platform/kernel/linux-rpi.git
14 months agoselftests/user_events: Reenable build
Mark Brown [Sun, 6 Aug 2023 11:29:59 +0000 (12:29 +0100)]
selftests/user_events: Reenable build

The user_events selftests were removed from the standard set of
selftests due to the uapi header it relies on having been temporarily
removed.  That header is now reinstated so we can reenable the tests.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
14 months agoselftests/filesystems: Add six consecutive 'x' characters to mktemp
Hui Min Mina Chou [Tue, 18 Jul 2023 03:43:51 +0000 (11:43 +0800)]
selftests/filesystems: Add six consecutive 'x' characters to mktemp

In busybox, the mktemp requires that the generated filename be
suffixed with at least six consecutive 'X' characters. Otherwise,
it will return an "Invalid argument" error.

Signed-off-by: Hui Min Mina Chou <minachou@andestech.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/rseq: Use rseq_unqual_scalar_typeof in macros
Mathieu Desnoyers [Tue, 27 Jun 2023 15:29:23 +0000 (11:29 -0400)]
selftests/rseq: Use rseq_unqual_scalar_typeof in macros

Use rseq_unqual_scalar_typeof() rather than typeof() in macros to remove
the volatile qualifier (if there is one in the input argument), thus
generating better assembly code in those scenarios.

Also add extra brackets around the "p" parameter in RSEQ_READ_ONCE(),
RSEQ_WRITE_ONCE(), and rseq_unqual_scalar_typeof() across architectures
to preserve expectations of operator priority. Here is an example that
shows how operator priority may be an issue with missing parentheses:

    #define m(p) \
    do { \
            __typeof__(*p) v = 0; \
    } while (0)

    void fct(unsigned long long *p1)
    {
            m(p1 + 1);      /* works */
            m(1 + p1);      /* broken */
    }

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/rseq: Fix arm64 buggy load-acquire/store-release macros
Mathieu Desnoyers [Tue, 27 Jun 2023 15:29:22 +0000 (11:29 -0400)]
selftests/rseq: Fix arm64 buggy load-acquire/store-release macros

The arm64 load-acquire/store-release macros from the Linux kernel rseq
selftests are buggy. Remplace them by a working implementation.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/rseq: Implement rseq_unqual_scalar_typeof
Mathieu Desnoyers [Tue, 27 Jun 2023 15:29:21 +0000 (11:29 -0400)]
selftests/rseq: Implement rseq_unqual_scalar_typeof

Allow defining variables and perform cast with a typeof which removes
the volatile and const qualifiers.

This prevents declaring a stack variable with a volatile qualifier
within a macro, which would generate sub-optimal assembler.

This is imported from the "librseq" project.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/rseq: Fix CID_ID typo in Makefile
Mathieu Desnoyers [Tue, 27 Jun 2023 15:29:20 +0000 (11:29 -0400)]
selftests/rseq: Fix CID_ID typo in Makefile

Ensure that the basic percpu ops tests are effectively built against
mm_cid.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests:prctl: add set-process-name to .gitignore
Shuah Khan [Tue, 25 Jul 2023 15:22:05 +0000 (09:22 -0600)]
selftests:prctl: add set-process-name to .gitignore

Add newly addded set-process-name test to .gitignore

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests:prctl: Fix make clean override warning
Shuah Khan [Tue, 25 Jul 2023 15:17:37 +0000 (09:17 -0600)]
selftests:prctl: Fix make clean override warning

Remove clean target in Makefile to fix the following warning
and use the one in common lib.mk

Makefile:14: warning: overriding recipe for target 'clean'
../lib.mk:160: warning: ignoring old recipe for target 'clean'

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Remove test type checks from cat_val()
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:07 +0000 (16:15 +0300)]
selftests/resctrl: Remove test type checks from cat_val()

cat_val() is only used during CAT test but it checks for test type.

Remove test type checks and the unused else branch from cat_val().

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Pass the real number of tests to show_cache_info()
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:06 +0000 (16:15 +0300)]
selftests/resctrl: Pass the real number of tests to show_cache_info()

Results include warm-up test which is discarded before passing the sum
to show_cache_info(). show_cache_info() handles this by subtracting one
from the number of tests in divisor. It is a trappy construct to have
sum and number of tests parameters to disagree like this.

A more logical place for subtracting the skipped tests is where the sum
is calculated so move it there. Pass the correct number of tests to
show_cache_info() so it can be used directly as the divisor for
calculating the average.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Move CAT/CMT test global vars to function they are used in
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:05 +0000 (16:15 +0300)]
selftests/resctrl: Move CAT/CMT test global vars to function they are used in

CAT and CMT tests have count_of_bits, long_mask, cbm_mask, and
cache_size global variables that can be moved into the sole using
function.

Make the global variables local variables of the relevant function to
scope them better.

While at it, move cache_size initialization into the declaration line.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Don't use variable argument list for ->setup()
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:04 +0000 (16:15 +0300)]
selftests/resctrl: Don't use variable argument list for ->setup()

struct resctrl_val_param has ->setup() function that accepts variable
argument list. All test cases use only 1 argument as input and it's
the struct resctrl_val_param pointer.

Instead of variable argument list, directly pass struct
resctrl_val_param pointer as the only parameter to ->setup().

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Don't pass test name to fill_buf
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:03 +0000 (16:15 +0300)]
selftests/resctrl: Don't pass test name to fill_buf

Test name is passed to fill_buf functions so that they can loop around
buffer only once. This is required for CAT test case.

To loop around buffer only once, caller doesn't need to let fill_buf
know which test case it is. Instead, pass a boolean argument 'once'
which makes fill_buf more generic.

As run_benchmark() no longer needs to pass the test name to
run_fill_buf(), a few test running functions can be simplified to not
write the test name into the default benchmark_cmd. The has_ben
argument can also be removed now from those test running functions.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Improve parameter consistency in fill_buf
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:02 +0000 (16:15 +0300)]
selftests/resctrl: Improve parameter consistency in fill_buf

fill_buf's arguments can be improved in multiple ways:

  - Multiple functions in fill_buf have start_ptr as one of their
    argument which is a bit long and the extra "start" is pretty
    obvious when it comes to pointers.

  - Some of the functions take end_ptr and others size_t to indicate
    the end of the buffer.

  - Some arguments meaning buffer size are called just 's'

  - mem_flush() takes void * but immediately converts it to char *

Cleanup the parameters to make things simpler and more consistent:

  - Rename start_ptr to simply buf as it's shorter.

  - Replace end_ptr and s parameters with buf_size and only calculate
    end_ptr in the functions that truly use it.

  - Make mem_flush() parameters to follow the same convention as the
    other functions in fill_buf.

  - convert mem_flush() char * to unsigned char *.

While at it, fix also a typo in a comment.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Remove unnecessary startptr global from fill_buf
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:01 +0000 (16:15 +0300)]
selftests/resctrl: Remove unnecessary startptr global from fill_buf

fill_buf stores buffer pointer into global variable startptr that is
only used in fill_cache().

Remove startptr as global variable, the local variable in fill_cache()
is enough to keep the pointer.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Remove "malloc_and_init_memory" param from run_fill_buf()
Ilpo Järvinen [Mon, 17 Jul 2023 13:15:00 +0000 (16:15 +0300)]
selftests/resctrl: Remove "malloc_and_init_memory" param from run_fill_buf()

run_fill_buf()'s malloc_and_init_memory parameter is always 1. There's
also duplicated memory init code for malloc_and_init_memory == 0 case
in fill_buf() which is unused.

Remove the malloc_and_init_memory parameter and the duplicated mem init
code.

While at it, fix also a typo in run_fill_buf() prototype's argument.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Remove duplicated preparation for span arg
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:59 +0000 (16:14 +0300)]
selftests/resctrl: Remove duplicated preparation for span arg

When no benchmark_cmd is given, benchmark_cmd[1] is set to span in
main(). There's no need to do it again in run_mba_test().

Remove the duplicated preparation for span argument into
benchmark_cmd[1] from run_mba_test(). After this, the has_ben and span
arguments to run_mba_test() can be removed.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Express span internally in bytes
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:58 +0000 (16:14 +0300)]
selftests/resctrl: Express span internally in bytes

MBA and MBM tests to use megabytes to represent span. CMT test uses
bytes. The difference requires run_benchmark() to size the buffer
differently based on the test name, which in turn requires passing the
test name into run_benchmark().

Convert MBA and MBM tests to use span internally in bytes like CMT test
to remove the internal inconsistency between the tests. Remove the test
dependent buffer sizing from run_benchmark().

This change eliminates one of the reasons why the test name has to be
passed around but there are still other users too so the test name
passing cannot yet be removed.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Convert span to size_t
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:57 +0000 (16:14 +0300)]
selftests/resctrl: Convert span to size_t

Span is defined either as unsigned long or int.

Consistently use size_t everywhere for span as it refers to size of the
memory block.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Remove mum_resctrlfs from struct resctrl_val_param
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:56 +0000 (16:14 +0300)]
selftests/resctrl: Remove mum_resctrlfs from struct resctrl_val_param

Resctrl FS mount/umount are now cleanly paired leaving .mum_resctrlfs
in the struct resctrl_val_param unused.

Remove .mum_resctrlfs from struct resctrl_val_param.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Refactor remount_resctrl(bool mum_resctrlfs) to mount_resctrl()
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:55 +0000 (16:14 +0300)]
selftests/resctrl: Refactor remount_resctrl(bool mum_resctrlfs) to mount_resctrl()

Mount/umount of the resctrl FS is now paired nicely per test.

Rename remount_resctrl(bool mum_resctrlfs) to mount_resctrl(). Make
it unconditionally try to mount the resctrl FS and return error if
resctrl FS was mounted already.

While at it, group the mount/umount prototypes in the header.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Move resctrl FS mount/umount to higher level
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:54 +0000 (16:14 +0300)]
selftests/resctrl: Move resctrl FS mount/umount to higher level

A few places currently lack umounting resctrl FS on error paths:
  - cmt_resctrl_val() has multiple error paths with direct return.
  - cat_perf_miss_val() has multiple error paths with direct return.
In addition, validate_resctrl_feature_request() is called by
run_mbm_test() and run_mba_test(). Neither MBA nor MBM test tries to
umount resctrl FS.

Each and every test does require resctrl FS to be present already for
feature check. Thus, it makes sense to just mount it on higher level in
resctrl_tests.c and properly pair it with umount.

Move resctrl FS (re)mount/unmount into each test function in
resctrl_tests.c. Make feature validation to simply check that resctrl
FS is mounted.

As there's the final umount in main() before this change, the selftest
should not leave resctrl FS behind after the tests even if one of the
forementioned paths is taken (thus, no fixes tag).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Unmount resctrl FS before starting the first test
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:53 +0000 (16:14 +0300)]
selftests/resctrl: Unmount resctrl FS before starting the first test

Resctrl FS mount/remount/umount code is hard to track. Better approach
is to use mount/umount pair for each test but that assumes resctrl FS
is not mounted beforehand.

Change umount_resctrlfs() so that it can unmount resctrl FS from any
path, and enable further simplifications into mount/remount/umount
logic by unmounting resctrl FS at the start if a pre-existing
mountpoint is found.

Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Close perf value read fd on errors
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:52 +0000 (16:14 +0300)]
selftests/resctrl: Close perf value read fd on errors

Perf event fd (fd_lm) is not closed when run_fill_buf() returns error.

Close fd_lm only in cat_val() to make it easier to track it is always
closed.

Fixes: 790bf585b0ee ("selftests/resctrl: Add Cache Allocation Technology (CAT) selftest")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Unmount resctrl FS if child fails to run benchmark
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:51 +0000 (16:14 +0300)]
selftests/resctrl: Unmount resctrl FS if child fails to run benchmark

A child calls PARENT_EXIT() when it fails to run a benchmark to kill
the parent process. PARENT_EXIT() lacks unmount for the resctrl FS and
the parent won't be there to unmount it either after it gets killed.

Add the resctrl FS unmount also to PARENT_EXIT().

Fixes: 591a6e8588fc ("selftests/resctrl: Add basic resctrl file system operations and data")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Don't leak buffer in fill_cache()
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:50 +0000 (16:14 +0300)]
selftests/resctrl: Don't leak buffer in fill_cache()

The error path in fill_cache() does return before the allocated buffer
is freed leaking the buffer.

The leak was introduced when fill_cache_read() started to return errors
in commit c7b607fa9325 ("selftests/resctrl: Fix null pointer
dereference on open failed"), before that both fill functions always
returned 0.

Move free() earlier to prevent the mem leak.

Fixes: c7b607fa9325 ("selftests/resctrl: Fix null pointer dereference on open failed")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests/resctrl: Add resctrl.h into build deps
Ilpo Järvinen [Mon, 17 Jul 2023 13:14:49 +0000 (16:14 +0300)]
selftests/resctrl: Add resctrl.h into build deps

Makefile only lists *.c as build dependencies for the resctrl_tests
executable which excludes resctrl.h.

Add *.h to wildcard() to include resctrl.h.

Fixes: 591a6e8588fc ("selftests/resctrl: Add basic resctrl file system operations and data")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoselftests: prctl: Add new prctl test for PR_SET_NAME
Osama Muhammad [Wed, 7 Jun 2023 15:36:00 +0000 (20:36 +0500)]
selftests: prctl: Add new prctl test for PR_SET_NAME

This patch will add the new test, which covers the prctl call
PR_SET_NAME command. The test tries to give a name using the PR_SET_NAME
call and then confirm it that it changed correctly by using  PR_GET_NAME.
It also tries to rename it with empty name.In the test PR_GET_NAME is
tested by passing null pointer to it and check its behaviour.

Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
15 months agoLinux 6.5-rc3
Linus Torvalds [Sun, 23 Jul 2023 22:24:10 +0000 (15:24 -0700)]
Linux 6.5-rc3

15 months agoMerge tag 'trace-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
Linus Torvalds [Sun, 23 Jul 2023 22:19:14 +0000 (15:19 -0700)]
Merge tag 'trace-v6.5-rc2' of git://git./linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Swapping the ring buffer for snapshotting (for things like irqsoff)
   can crash if the ring buffer is being resized. Disable swapping when
   this happens. The missed swap will be reported to the tracer

 - Report error if the histogram fails to be created due to an error in
   adding a histogram variable, in event_hist_trigger_parse()

 - Remove unused declaration of tracing_map_set_field_descr()

* tag 'trace-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/histograms: Return an error if we fail to add histogram to hist_vars list
  ring-buffer: Do not swap cpu_buffer during resize process
  tracing: Remove unused extern declaration tracing_map_set_field_descr()

15 months agoMerge tag 'kbuild-fixes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahi...
Linus Torvalds [Sun, 23 Jul 2023 21:55:41 +0000 (14:55 -0700)]
Merge tag 'kbuild-fixes-v6.5' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix stale help text in gconfig

 - Support *.S files in compile_commands.json

 - Flatten KBUILD_CFLAGS

 - Fix external module builds with Rust so that temporary files are
   created in the modules directories instead of the kernel tree

* tag 'kbuild-fixes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: rust: avoid creating temporary files
  kbuild: flatten KBUILD_CFLAGS
  gen_compile_commands: add assembly files to compilation database
  kconfig: gconfig: correct program name in help text
  kconfig: gconfig: drop the Show Debug Info help text

15 months agokbuild: rust: avoid creating temporary files
Miguel Ojeda [Sun, 23 Jul 2023 14:21:28 +0000 (16:21 +0200)]
kbuild: rust: avoid creating temporary files

`rustc` outputs by default the temporary files (i.e. the ones saved
by `-Csave-temps`, such as `*.rcgu*` files) in the current working
directory when `-o` and `--out-dir` are not given (even if
`--emit=x=path` is given, i.e. it does not use those for temporaries).

Since out-of-tree modules are compiled from the `linux` tree,
`rustc` then tries to create them there, which may not be accessible.

Thus pass `--out-dir` explicitly, even if it is just for the temporary
files.

Similarly, do so for Rust host programs too.

Reported-by: Raphael Nestler <raphael.nestler@gmail.com>
Closes: https://github.com/Rust-for-Linux/linux/issues/1015
Reported-by: Andrea Righi <andrea.righi@canonical.com>
Tested-by: Raphael Nestler <raphael.nestler@gmail.com> # non-hostprogs
Tested-by: Andrea Righi <andrea.righi@canonical.com> # non-hostprogs
Fixes: 295d8398c67e ("kbuild: specify output names separately for each emission type from rustc")
Cc: stable@vger.kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Tested-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 23 Jul 2023 17:44:38 +0000 (10:44 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "ARM:

   - Avoid pKVM finalization if KVM initialization fails

   - Add missing BTI instructions in the hypervisor, fixing an early
     boot failure on BTI systems

   - Handle MMU notifiers correctly for non hugepage-aligned memslots

   - Work around a bug in the architecture where hypervisor timer
     controls have UNKNOWN behavior under nested virt

   - Disable preemption in kvm_arch_hardware_enable(), fixing a kernel
     BUG in cpu hotplug resulting from per-CPU accessor sanity checking

   - Make WFI emulation on GICv4 systems robust w.r.t. preemption,
     consistently requesting a doorbell interrupt on vcpu_put()

   - Uphold RES0 sysreg behavior when emulating older PMU versions

   - Avoid macro expansion when initializing PMU register names,
     ensuring the tracepoints pretty-print the sysreg

  s390:

   - Two fixes for asynchronous destroy

  x86 fixes will come early next week"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: s390: pv: fix index value of replaced ASCE
  KVM: s390: pv: simplify shutdown and fix race
  KVM: arm64: Fix the name of sys_reg_desc related to PMU
  KVM: arm64: Correctly handle RES0 bits PMEVTYPER<n>_EL0.evtCount
  KVM: arm64: vgic-v4: Make the doorbell request robust w.r.t preemption
  KVM: arm64: Add missing BTI instructions
  KVM: arm64: Correctly handle page aging notifiers for unaligned memslot
  KVM: arm64: Disable preemption in kvm_arch_hardware_enable()
  KVM: arm64: Handle kvm_arm_init failure correctly in finalize_pkvm
  KVM: arm64: timers: Use CNTHCTL_EL2 when setting non-CNTKCTL_EL1 bits

15 months agoMerge tag 'ext4_for_linus-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 23 Jul 2023 17:21:49 +0000 (10:21 -0700)]
Merge tag 'ext4_for_linus-6.5-rc3' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Bug and regression fixes for 6.5-rc3 for ext4's mballoc and jbd2's
  checkpoint code"

* tag 'ext4_for_linus-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix rbtree traversal bug in ext4_mb_use_preallocated
  ext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()
  ext4: correct inline offset when handling xattrs in inode body
  jbd2: remove __journal_try_to_free_buffer()
  jbd2: fix a race when checking checkpoint buffer busy
  jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint
  jbd2: remove journal_clean_one_cp_list()
  jbd2: remove t_checkpoint_io_list
  jbd2: recheck chechpointing non-dirty buffer

15 months agoMerge tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sun, 23 Jul 2023 17:16:44 +0000 (10:16 -0700)]
Merge tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fix from Steve French:
 "Add minor debugging improvement.

  The change improves ability to read a network trace to debug problems
  on encrypted connections which are very common (e.g. using wireshark
  or tcpdump).

  That works today with tools like 'smbinfo keys /mnt/file' but requires
  passing in a filename on the mount (see e.g. [1]), but it often makes
  more sense to just pass in the mount point path (ie a directory not a
  filename).

  So this fix was needed to debug some types of problems (an obvious
  example is on an encrypted connection failing operations on an empty
  share or with no files in the root of the directory) - so you can
  simply pass in the 'smbinfo keys <mntpoint>' and get the information
  that wireshark needs"

Link: https://wiki.samba.org/index.php/Wireshark_Decryption
* tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number for cifs.ko
  cifs: allow dumping keys for directories too

15 months agoMerge tag 'kvm-s390-master-6.5-1' of https://git.kernel.org/pub/scm/linux/kernel...
Paolo Bonzini [Sun, 23 Jul 2023 16:50:30 +0000 (12:50 -0400)]
Merge tag 'kvm-s390-master-6.5-1' of https://git./linux/kernel/git/kvms390/linux into HEAD

Two fixes for asynchronous destroy

15 months agoMerge tag 'kvmarm-fixes-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmar...
Paolo Bonzini [Sun, 23 Jul 2023 16:50:14 +0000 (12:50 -0400)]
Merge tag 'kvmarm-fixes-6.5-1' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.5, part #1

 - Avoid pKVM finalization if KVM initialization fails

 - Add missing BTI instructions in the hypervisor, fixing an early boot
   failure on BTI systems

 - Handle MMU notifiers correctly for non hugepage-aligned memslots

 - Work around a bug in the architecture where hypervisor timer controls
   have UNKNOWN behavior under nested virt.

 - Disable preemption in kvm_arch_hardware_enable(), fixing a kernel BUG
   in cpu hotplug resulting from per-CPU accessor sanity checking.

 - Make WFI emulation on GICv4 systems robust w.r.t. preemption,
   consistently requesting a doorbell interrupt on vcpu_put()

 - Uphold RES0 sysreg behavior when emulating older PMU versions

 - Avoid macro expansion when initializing PMU register names, ensuring
   the tracepoints pretty-print the sysreg.

15 months agotracing/histograms: Return an error if we fail to add histogram to hist_vars list
Mohamed Khalfella [Fri, 14 Jul 2023 20:33:41 +0000 (20:33 +0000)]
tracing/histograms: Return an error if we fail to add histogram to hist_vars list

Commit 6018b585e8c6 ("tracing/histograms: Add histograms to hist_vars if
they have referenced variables") added a check to fail histogram creation
if save_hist_vars() failed to add histogram to hist_vars list. But the
commit failed to set ret to failed return code before jumping to
unregister histogram, fix it.

Link: https://lore.kernel.org/linux-trace-kernel/20230714203341.51396-1-mkhalfella@purestorage.com
Cc: stable@vger.kernel.org
Fixes: 6018b585e8c6 ("tracing/histograms: Add histograms to hist_vars if they have referenced variables")
Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agoring-buffer: Do not swap cpu_buffer during resize process
Chen Lin [Wed, 19 Jul 2023 07:58:47 +0000 (15:58 +0800)]
ring-buffer: Do not swap cpu_buffer during resize process

When ring_buffer_swap_cpu was called during resize process,
the cpu buffer was swapped in the middle, resulting in incorrect state.
Continuing to run in the wrong state will result in oops.

This issue can be easily reproduced using the following two scripts:
/tmp # cat test1.sh
//#! /bin/sh
for i in `seq 0 100000`
do
         echo 2000 > /sys/kernel/debug/tracing/buffer_size_kb
         sleep 0.5
         echo 5000 > /sys/kernel/debug/tracing/buffer_size_kb
         sleep 0.5
done
/tmp # cat test2.sh
//#! /bin/sh
for i in `seq 0 100000`
do
        echo irqsoff > /sys/kernel/debug/tracing/current_tracer
        sleep 1
        echo nop > /sys/kernel/debug/tracing/current_tracer
        sleep 1
done
/tmp # ./test1.sh &
/tmp # ./test2.sh &

A typical oops log is as follows, sometimes with other different oops logs.

[  231.711293] WARNING: CPU: 0 PID: 9 at kernel/trace/ring_buffer.c:2026 rb_update_pages+0x378/0x3f8
[  231.713375] Modules linked in:
[  231.714735] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.5.0-rc1-00276-g20edcec23f92 #15
[  231.716750] Hardware name: linux,dummy-virt (DT)
[  231.718152] Workqueue: events update_pages_handler
[  231.719714] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  231.721171] pc : rb_update_pages+0x378/0x3f8
[  231.722212] lr : rb_update_pages+0x25c/0x3f8
[  231.723248] sp : ffff800082b9bd50
[  231.724169] x29: ffff800082b9bd50 x28: ffff8000825f7000 x27: 0000000000000000
[  231.726102] x26: 0000000000000001 x25: fffffffffffff010 x24: 0000000000000ff0
[  231.728122] x23: ffff0000c3a0b600 x22: ffff0000c3a0b5c0 x21: fffffffffffffe0a
[  231.730203] x20: ffff0000c3a0b600 x19: ffff0000c0102400 x18: 0000000000000000
[  231.732329] x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffffe7aa8510
[  231.734212] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000002
[  231.736291] x11: ffff8000826998a8 x10: ffff800082b9baf0 x9 : ffff800081137558
[  231.738195] x8 : fffffc00030e82c8 x7 : 0000000000000000 x6 : 0000000000000001
[  231.740192] x5 : ffff0000ffbafe00 x4 : 0000000000000000 x3 : 0000000000000000
[  231.742118] x2 : 00000000000006aa x1 : 0000000000000001 x0 : ffff0000c0007208
[  231.744196] Call trace:
[  231.744892]  rb_update_pages+0x378/0x3f8
[  231.745893]  update_pages_handler+0x1c/0x38
[  231.746893]  process_one_work+0x1f0/0x468
[  231.747852]  worker_thread+0x54/0x410
[  231.748737]  kthread+0x124/0x138
[  231.749549]  ret_from_fork+0x10/0x20
[  231.750434] ---[ end trace 0000000000000000 ]---
[  233.720486] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[  233.721696] Mem abort info:
[  233.721935]   ESR = 0x0000000096000004
[  233.722283]   EC = 0x25: DABT (current EL), IL = 32 bits
[  233.722596]   SET = 0, FnV = 0
[  233.722805]   EA = 0, S1PTW = 0
[  233.723026]   FSC = 0x04: level 0 translation fault
[  233.723458] Data abort info:
[  233.723734]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[  233.724176]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[  233.724589]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  233.725075] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000104943000
[  233.725592] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
[  233.726231] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
[  233.726720] Modules linked in:
[  233.727007] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.5.0-rc1-00276-g20edcec23f92 #15
[  233.727777] Hardware name: linux,dummy-virt (DT)
[  233.728225] Workqueue: events update_pages_handler
[  233.728655] pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  233.729054] pc : rb_update_pages+0x1a8/0x3f8
[  233.729334] lr : rb_update_pages+0x154/0x3f8
[  233.729592] sp : ffff800082b9bd50
[  233.729792] x29: ffff800082b9bd50 x28: ffff8000825f7000 x27: 0000000000000000
[  233.730220] x26: 0000000000000000 x25: ffff800082a8b840 x24: ffff0000c0102418
[  233.730653] x23: 0000000000000000 x22: fffffc000304c880 x21: 0000000000000003
[  233.731105] x20: 00000000000001f4 x19: ffff0000c0102400 x18: ffff800082fcbc58
[  233.731727] x17: 0000000000000000 x16: 0000000000000001 x15: 0000000000000001
[  233.732282] x14: ffff8000825fe0c8 x13: 0000000000000001 x12: 0000000000000000
[  233.732709] x11: ffff8000826998a8 x10: 0000000000000ae0 x9 : ffff8000801b760c
[  233.733148] x8 : fefefefefefefeff x7 : 0000000000000018 x6 : ffff0000c03298c0
[  233.733553] x5 : 0000000000000002 x4 : 0000000000000000 x3 : 0000000000000000
[  233.733972] x2 : ffff0000c3a0b600 x1 : 0000000000000000 x0 : 0000000000000000
[  233.734418] Call trace:
[  233.734593]  rb_update_pages+0x1a8/0x3f8
[  233.734853]  update_pages_handler+0x1c/0x38
[  233.735148]  process_one_work+0x1f0/0x468
[  233.735525]  worker_thread+0x54/0x410
[  233.735852]  kthread+0x124/0x138
[  233.736064]  ret_from_fork+0x10/0x20
[  233.736387] Code: 92400000 910006b5 aa000021 aa0303f7 (f9400060)
[  233.736959] ---[ end trace 0000000000000000 ]---

After analysis, the seq of the error is as follows [1-5]:

int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
int cpu_id)
{
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
//1. get cpu_buffer, aka cpu_buffer(A)
...
...
schedule_work_on(cpu,
 &cpu_buffer->update_pages_work);
//2. 'update_pages_work' is queue on 'cpu', cpu_buffer(A) is passed to
// update_pages_handler, do the update process, set 'update_done' in
// complete(&cpu_buffer->update_done) and to wakeup resize process.
//---->
//3. Just at this moment, ring_buffer_swap_cpu is triggered,
//cpu_buffer(A) be swaped to cpu_buffer(B), the max_buffer.
//ring_buffer_swap_cpu is called as the 'Call trace' below.

Call trace:
 dump_backtrace+0x0/0x2f8
 show_stack+0x18/0x28
 dump_stack+0x12c/0x188
 ring_buffer_swap_cpu+0x2f8/0x328
 update_max_tr_single+0x180/0x210
 check_critical_timing+0x2b4/0x2c8
 tracer_hardirqs_on+0x1c0/0x200
 trace_hardirqs_on+0xec/0x378
 el0_svc_common+0x64/0x260
 do_el0_svc+0x90/0xf8
 el0_svc+0x20/0x30
 el0_sync_handler+0xb0/0xb8
 el0_sync+0x180/0x1c0
//<----

/* wait for all the updates to complete */
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
//4. get cpu_buffer, cpu_buffer(B) is used in the following process,
//the state of cpu_buffer(A) and cpu_buffer(B) is totally wrong.
//for example, cpu_buffer(A)->update_done will leave be set 1, and will
//not 'wait_for_completion' at the next resize round.
  if (!cpu_buffer->nr_pages_to_update)
continue;

if (cpu_online(cpu))
wait_for_completion(&cpu_buffer->update_done);
cpu_buffer->nr_pages_to_update = 0;
}
...
}
//5. the state of cpu_buffer(A) and cpu_buffer(B) is totally wrong,
//Continuing to run in the wrong state, then oops occurs.

Link: https://lore.kernel.org/linux-trace-kernel/202307191558478409990@zte.com.cn
Signed-off-by: Chen Lin <chen.lin5@zte.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agotracing: Remove unused extern declaration tracing_map_set_field_descr()
YueHaibing [Sat, 22 Jul 2023 03:21:23 +0000 (11:21 +0800)]
tracing: Remove unused extern declaration tracing_map_set_field_descr()

Since commit 08d43a5fa063 ("tracing: Add lock-free tracing_map"),
this is never used, so can be removed.

Link: https://lore.kernel.org/linux-trace-kernel/20230722032123.24664-1-yuehaibing@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agokbuild: flatten KBUILD_CFLAGS
Alexey Dobriyan [Thu, 13 Jul 2023 18:52:28 +0000 (21:52 +0300)]
kbuild: flatten KBUILD_CFLAGS

Make it slightly easier to see which compiler options are added and
removed (and not worry about column limit too!).

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agogen_compile_commands: add assembly files to compilation database
Benjamin Gray [Wed, 19 Jul 2023 03:19:12 +0000 (13:19 +1000)]
gen_compile_commands: add assembly files to compilation database

Like C source files, tooling can find it useful to have the assembly
source file compilation recorded.

The .S extension appears to used across all architectures.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agoext4: fix rbtree traversal bug in ext4_mb_use_preallocated
Ojaswin Mujoo [Sat, 22 Jul 2023 17:15:24 +0000 (22:45 +0530)]
ext4: fix rbtree traversal bug in ext4_mb_use_preallocated

During allocations, while looking for preallocations(PA) in the per
inode rbtree, we can't do a direct traversal of the tree because
ext4_mb_discard_group_preallocation() can paralelly mark the pa deleted
and that can cause direct traversal to skip some entries. This was
leading to a BUG_ON() being hit [1] when we missed a PA that could satisfy
our request and ultimately tried to create a new PA that would overlap
with the missed one.

To makes sure we handle that case while still keeping the performance of
the rbtree, we make use of the fact that the only pa that could possibly
overlap the original goal start is the one that satisfies the below
conditions:

  1. It must have it's logical start immediately to the left of
  (ie less than) original logical start.

  2. It must not be deleted

To find this pa we use the following traversal method:

1. Descend into the rbtree normally to find the immediate neighboring
PA. Here we keep descending irrespective of if the PA is deleted or if
it overlaps with our request etc. The goal is to find an immediately
adjacent PA.

2. If the found PA is on right of original goal, use rb_prev() to find
the left adjacent PA.

3. Check if this PA is deleted and keep moving left with rb_prev() until
a non deleted PA is found.

4. This is the PA we are looking for. Now we can check if it can satisfy
the original request and proceed accordingly.

This approach also takes care of having deleted PAs in the tree.

(While we are at it, also fix a possible overflow bug in calculating the
end of a PA)

[1] https://lore.kernel.org/linux-ext4/CA+G9fYv2FRpLqBZf34ZinR8bU2_ZRAUOjKAD3+tKRFaEQHtt8Q@mail.gmail.com/

Cc: stable@kernel.org # 6.4
Fixes: 3872778664e3 ("ext4: Use rbtrees to manage PAs instead of inode i_prealloc_list")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reviewed-by: Ritesh Harjani (IBM) ritesh.list@gmail.com
Tested-by: Ritesh Harjani (IBM) ritesh.list@gmail.com
Link: https://lore.kernel.org/r/edd2efda6a83e6343c5ace9deea44813e71dbe20.1690045963.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()
Ojaswin Mujoo [Fri, 9 Jun 2023 10:34:03 +0000 (16:04 +0530)]
ext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()

In ext4_mb_choose_next_group_best_avail(), we want the start order to be
1 less than goal length and the min_order to be, at max, 1 more than the
original length. This commit fixes an off by one issue that arose due to
the fact that 1 << fls(n) > (n).

After all the processing:

order = 1 order below goal len
min_order = maximum of the three:-
             - order - trim_order
             - 1 order below B2C(s_stripe)
             - 1 order above original len

Cc: stable@kernel.org
Fixes: 33122aa930 ("ext4: Add allocation criteria 1.5 (CR1_5)")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/20230609103403.112807-1-ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoext4: correct inline offset when handling xattrs in inode body
Eric Whitney [Mon, 22 May 2023 18:15:20 +0000 (14:15 -0400)]
ext4: correct inline offset when handling xattrs in inode body

When run on a file system where the inline_data feature has been
enabled, xfstests generic/269, generic/270, and generic/476 cause ext4
to emit error messages indicating that inline directory entries are
corrupted.  This occurs because the inline offset used to locate
inline directory entries in the inode body is not updated when an
xattr in that shared region is deleted and the region is shifted in
memory to recover the space it occupied.  If the deleted xattr precedes
the system.data attribute, which points to the inline directory entries,
that attribute will be moved further up in the region.  The inline
offset continues to point to whatever is located in system.data's former
location, with unfortunate effects when used to access directory entries
or (presumably) inline data in the inode body.

Cc: stable@kernel.org
Signed-off-by: Eric Whitney <enwlinux@gmail.com>
Link: https://lore.kernel.org/r/20230522181520.1570360-1-enwlinux@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoMerge tag 'powerpc-6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sun, 23 Jul 2023 02:32:00 +0000 (19:32 -0700)]
Merge tag 'powerpc-6.5-4' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Reinstate support for little endian ELFv1 binaries, which it turns
   out still exist in the wild.

 - Revert a change which used asm goto for WARN_ON/__WARN_FLAGS, as it
   lead to dead code generation and seemed to trigger compiler bugs in
   some edge cases.

 - Fix a deadlock in the pseries VAS code, between live migration and
   the driver's mmap handler.

 - Disable KCOV instrumentation in the powerpc KASAN code.

Thanks to Andrew Donnellan, Benjamin Gray, Christophe Leroy, Haren
Myneni, Russell Currey, and Uwe Kleine-König.

* tag 'powerpc-6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  Revert "powerpc/64s: Remove support for ELFv1 little endian userspace"
  powerpc/kasan: Disable KCOV in KASAN code
  powerpc/512x: lpbfifo: Convert to platform remove callback returning void
  powerpc/crypto: Add gitignore for generated P10 AES/GCM .S files
  Revert "powerpc/bug: Provide better flexibility to WARN_ON/__WARN_FLAGS() with asm goto"
  powerpc/pseries/vas: Hold mmap_mutex after mmap lock during window close

15 months agocifs: update internal module version number for cifs.ko
Steve French [Thu, 20 Jul 2023 13:30:32 +0000 (08:30 -0500)]
cifs: update internal module version number for cifs.ko

From 2.43 to 2.44

Signed-off-by: Steve French <stfrench@microsoft.com>
15 months agocifs: allow dumping keys for directories too
Shyam Prasad N [Fri, 16 Jun 2023 10:37:46 +0000 (10:37 +0000)]
cifs: allow dumping keys for directories too

Dumping the enc/dec keys is a session wide operation.
And it should not matter if the ioctl was run on
a regular file or a directory.

Currently, we obtain the tcon pointer from the
cifs file handle. But since there's no dir open call
in cifs, this is not populated for dirs.

This change allows dumping of session keys using ioctl
even for directories. To do this, we'll now get the
tcon pointer from the superblock, and not from the file
handle.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
15 months agoMerge tag 's390-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 22 Jul 2023 18:24:03 +0000 (11:24 -0700)]
Merge tag 's390-6.5-3' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - Fix per vma lock fault handling: add missing !(fault & VM_FAULT_ERROR)
   check to fault handler to prevent error handling for return values
   that don't indicate an error

 - Use kfree_sensitive() instead of kfree() in paes crypto code to clear
   memory that may contain keys before freeing it

 - Fix reply buffer size calculation for CCA replies in zcrypt device
   driver

* tag 's390-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/zcrypt: fix reply buffer calculations for CCA replies
  s390/crypto: use kfree_sensitive() instead of kfree()
  s390/mm: fix per vma lock fault handling

15 months agoMerge tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 22 Jul 2023 18:05:15 +0000 (11:05 -0700)]
Merge tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - Fix for loop regressions (Mauricio)

 - Fix a potential stall with batched wakeups in sbitmap (David)

 - Fix for stall with recursive plug flushes (Ross)

 - Skip accounting of empty requests for blk-iocost (Chengming)

 - Remove a dead field in struct blk_mq_hw_ctx (Chengming)

* tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux:
  loop: do not enforce max_loop hard limit by (new) default
  loop: deprecate autoloading callback loop_probe()
  sbitmap: fix batching wakeup
  blk-iocost: skip empty flush bio in iocost
  blk-mq: delete dead struct blk_mq_hw_ctx->queued field
  blk-mq: Fix stall due to recursive flush plug

15 months agoMerge tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 22 Jul 2023 17:46:30 +0000 (10:46 -0700)]
Merge tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:

 - Fix for io-wq not always honoring REQ_F_NOWAIT, if it was set and
   punted directly (eg via DRAIN) (me)

 - Capability check fix (Ondrej)

 - Regression fix for the mmap changes that went into 6.4, which
   apparently broke IA64 (Helge)

* tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux:
  ia64: mmap: Consider pgoff when searching for free mapping
  io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()
  io_uring: treat -EAGAIN for REQ_F_NOWAIT as final for io-wq
  io_uring: don't audit the capability check in io_uring_create()

15 months agoMerge tag 'devicetree-fixes-for-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Jul 2023 17:28:22 +0000 (10:28 -0700)]
Merge tag 'devicetree-fixes-for-6.5-1' of git://git./linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Fix moortec,mr75203 schema usage of 'multipleOf' keyword

 - Fix regression in systems depending on "of-display" device name

 - Build fix for s390 with CONFIG_PCI=n and OF_EARLY_FLATTREE=y

 - Drop two obsolete serial .txt bindings

* tag 'devicetree-fixes-for-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt
  dt-bindings: serial: Remove obsolete cavium-uart.txt
  dt-bindings: hwmon: moortec,mr75203: fix multipleOf for coefficients
  of: Preserve "of-display" device name for compatibility
  of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

15 months agoMerge tag 'regmap-fix-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 22 Jul 2023 17:20:56 +0000 (10:20 -0700)]
Merge tag 'regmap-fix-v6.5-rc2' of git://git./linux/kernel/git/broonie/regmap

Pull regmap fixes from Mark Brown:
 "Three fixes here:

   - The issues with accounting for register and padding length on raw
     buses turn out to be quite widespread in custom buses.

     In order to avoid disturbing anything drop the initial fixes and
     fall back to a point fix in the SMBus code where the issue was
     originally noticed, a more substantial refactoring of the API which
     ensures that all buses make the same assumptions will follow.

   - The generic regcache code had been forcing on async I/O which did
     not work with the new maple tree sync code when used with SPI.

     Since that was mainly for the rbtree cache and the assumptions
     about hardware that drove the choice are probably not true any more
     fix this by pushing the enablement of async down into the rbtree
     code.

     This probably also makes cache syncs for systems faster though it's
     not the point.

   - The test code was triggering use of the rbtree and maple tree
     caches with dynamic allocation of nodes since all the testing is
     with RAM backed caches with no I/O performance issues.

     Just disable the locking in the tests to avoid triggering warnings
     when allocation debugging is turned on, it's not really what's
     being tested"

* tag 'regmap-fix-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: Disable locking for RBTREE and MAPLE unit tests
  regcache: Push async I/O request down into the rbtree cache
  regmap: Account for register length in SMBus I/O limits
  regmap: Drop initial version of maximum transfer length fixes

15 months agoMerge tag 'gpio-fixes-for-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Jul 2023 17:14:04 +0000 (10:14 -0700)]
Merge tag 'gpio-fixes-for-v6.5-rc3' of git://git./linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix initial value handling for output-only pins in gpio-tps68470

 - fix two resource leaks in gpio-mvebu

* tag 'gpio-fixes-for-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: mvebu: fix irq domain leak
  gpio: mvebu: Make use of devm_pwmchip_add
  gpio: tps68470: Make tps68470_gpio_output() always set the initial value

15 months agodt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt
Rob Herring [Fri, 7 Jul 2023 22:16:06 +0000 (16:16 -0600)]
dt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt

nxp,lpc1850-uart.txt binding is already covered by 8250.yaml, so remove
it.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230707221607.1064888-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
15 months agodt-bindings: serial: Remove obsolete cavium-uart.txt
Rob Herring [Fri, 7 Jul 2023 22:16:02 +0000 (16:16 -0600)]
dt-bindings: serial: Remove obsolete cavium-uart.txt

cavium-uart.txt binding is already covered by 8250.yaml, so remove it.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230707221602.1063972-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
15 months agoloop: do not enforce max_loop hard limit by (new) default
Mauricio Faria de Oliveira [Thu, 20 Jul 2023 14:30:33 +0000 (11:30 -0300)]
loop: do not enforce max_loop hard limit by (new) default

Problem:

The max_loop parameter is used for 2 different purposes:

1) initial number of loop devices to pre-create on init
2) maximum number of loop devices to add on access/open()

Historically, its default value (zero) caused 1) to create non-zero
number of devices (CONFIG_BLK_DEV_LOOP_MIN_COUNT), and no hard limit on
2) to add devices with autoloading.

However, the default value changed in commit 85c50197716c ("loop: Fix
the max_loop commandline argument treatment when it is set to 0") to
CONFIG_BLK_DEV_LOOP_MIN_COUNT, for max_loop=0 not to pre-create devices.

That does improve 1), but unfortunately it breaks 2), as the default
behavior changed from no-limit to hard-limit.

Example:

For example, this userspace code broke for N >= CONFIG, if the user
relied on the default value 0 for max_loop:

    mknod("/dev/loopN");
    open("/dev/loopN");  // now fails with ENXIO

Though affected users may "fix" it with (loop.)max_loop=0, this means to
require a kernel parameter change on stable kernel update (that commit
Fixes: an old commit in stable).

Solution:

The original semantics for the default value in 2) can be applied if the
parameter is not set (ie, default behavior).

This still keeps the intended function in 1) and 2) if set, and that
commit's intended improvement in 1) if max_loop=0.

Before 85c50197716c:
  - default:     1) CONFIG devices   2) no limit
  - max_loop=0:  1) CONFIG devices   2) no limit
  - max_loop=X:  1) X devices        2) X limit

After 85c50197716c:
  - default:     1) CONFIG devices   2) CONFIG limit (*)
  - max_loop=0:  1) 0 devices (*)    2) no limit
  - max_loop=X:  1) X devices        2) X limit

This commit:
  - default:     1) CONFIG devices   2) no limit (*)
  - max_loop=0:  1) 0 devices        2) no limit
  - max_loop=X:  1) X devices        2) X limit

Future:

The issue/regression from that commit only affects code under the
CONFIG_BLOCK_LEGACY_AUTOLOAD deprecation guard, thus the fix too is
contained under it.

Once that deprecated functionality/code is removed, the purpose 2) of
max_loop (hard limit) is no longer in use, so the module parameter
description can be changed then.

Tests:

Linux 6.4-rc7
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
CONFIG_BLOCK_LEGACY_AUTOLOAD=y

- default (original)

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
open: /dev/loop8: No such device or address

- default (patched)

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
#

- max_loop=0 (original & patched):

# ls -1 /dev/loop*
/dev/loop-control

# ./test-loop
#

- max_loop=8 (original & patched):

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
open: /dev/loop8: No such device or address

- max_loop=0 (patched; CONFIG_BLOCK_LEGACY_AUTOLOAD is not set)

# ls -1 /dev/loop*
/dev/loop-control

# ./test-loop
open: /dev/loop8: No such device or address

Fixes: 85c50197716c ("loop: Fix the max_loop commandline argument treatment when it is set to 0")
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230720143033.841001-3-mfo@canonical.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoloop: deprecate autoloading callback loop_probe()
Mauricio Faria de Oliveira [Thu, 20 Jul 2023 14:30:32 +0000 (11:30 -0300)]
loop: deprecate autoloading callback loop_probe()

The 'probe' callback in __register_blkdev() is only used under the
CONFIG_BLOCK_LEGACY_AUTOLOAD deprecation guard.

The loop_probe() function is only used for that callback, so guard it
too, accordingly.

See commit fbdee71bb5d8 ("block: deprecate autoloading based on dev_t").

Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230720143033.841001-2-mfo@canonical.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agosbitmap: fix batching wakeup
David Jeffery [Fri, 21 Jul 2023 09:57:15 +0000 (17:57 +0800)]
sbitmap: fix batching wakeup

Current code supposes that it is enough to provide forward progress by
just waking up one wait queue after one completion batch is done.

Unfortunately this way isn't enough, cause waiter can be added to wait
queue just after it is woken up.

Follows one example(64 depth, wake_batch is 8)

1) all 64 tags are active

2) in each wait queue, there is only one single waiter

3) each time one completion batch(8 completions) wakes up just one
   waiter in each wait queue, then immediately one new sleeper is added
   to this wait queue

4) after 64 completions, 8 waiters are wakeup, and there are still 8
   waiters in each wait queue

5) after another 8 active tags are completed, only one waiter can be
   wakeup, and the other 7 can't be waken up anymore.

Turns out it isn't easy to fix this problem, so simply wakeup enough
waiters for single batch.

Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Chengming Zhou <zhouchengming@bytedance.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20230721095715.232728-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 21 Jul 2023 17:24:21 +0000 (10:24 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "I've picked up a handful of arm64 fixes while Catalin's been away, so
  here they are. Below is the usual summary, but we have basically have
  two cleanups, a fix for an SME crash and a fix for hibernation:

   - Fix saving of SME state after SVE vector length is changed

   - Fix sparse warnings for missing vDSO function prototypes

   - Fix hibernation resume path when kfence is enabled

   - Fix field names for the HFGxTR_EL2 register"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
  arm64: vdso: Clear common make C=2 warnings
  arm64: mm: Make hibernation aware of KFENCE
  arm64: Fix HFGxTR_EL2 field naming

15 months agoMerge tag 'pm-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 21 Jul 2023 17:16:20 +0000 (10:16 -0700)]
Merge tag 'pm-6.5-rc3' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Revert three recent intel_idle commits that introduced a functional
  issue, included a coding mistake and have been questioned at the
  design level"

* tag 'pm-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "intel_idle: Add support for using intel_idle in a VM guest using just hlt"
  Revert "intel_idle: Add a "Long HLT" C1 state for the VM guest mode"
  Revert "intel_idle: Add __init annotation to matchup_vm_state_with_baremetal()"

15 months agoMerge tag 'sound-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 21 Jul 2023 17:10:18 +0000 (10:10 -0700)]
Merge tag 'sound-6.5-rc3' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A pile of fixes that have been gathered since the previous pull. Most
  of changes are device-specific, and nothing looks too scary.

   - A memory leak fix in ALSA sequencer code in 6.5-rc

   - Many fixes for ASoC Qualcomm CODEC drivers, covering SoundWire
     probe problems

   - A series of ASoC AMD fixes

   - A few fixes and cleanups of selftest stuff

   - HD-audio codec fixes and quirks for Clevo, HP, Lenovo, Dell"

* tag 'sound-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (52 commits)
  ALSA: hda/realtek: Add support for DELL Oasis 13/14/16 laptops
  ALSA: hda/realtek: Fix generic fixup definition for cs35l41 amp
  ALSA: hda/realtek: Enable Mute LED on HP Laptop 15s-eq2xxx
  selftests: ALSA: Add test-pcmtest-driver to .gitignore
  ALSA: hda/realtek: Add quirk for Clevo NS70AU
  ASoC: fsl_sai: Disable bit clock with transmitter
  ALSA: seq: Fix memory leak at error path in snd_seq_create_port()
  ASoC: SOF: ipc3-dtrace: uninitialized data in dfsentry_trace_filter_write()
  ASoC: cs42l51: fix driver to properly autoload with automatic module loading
  MAINTAINERS: Redo addition of ssm3515 to APPLE SOUND
  ASoC: rt5640: Fix the issue of speaker noise
  ALSA: hda/realtek - remove 3k pull low procedure
  selftests: ALSA: Fix fclose on an already fclosed file pointer
  ALSA: pcmtest: Don't use static storage to track per device data
  ALSA: pcmtest: Convert to platform remove callback returning void
  ASoC: dt-bindings: audio-graph-card2: Drop incomplete example
  ASoC: dt-bindings: Update maintainer email id
  ASoC: amd: ps: Fix extraneous error messages
  ASoC: fsl_sai: Revert "ASoC: fsl_sai: Enable MCTL_MCLK_EN bit for master mode"
  ASoC: codecs: SND_SOC_WCD934X should select REGMAP_IRQ
  ...

15 months agoMerge tag 'fbdev-for-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 21 Jul 2023 17:00:09 +0000 (10:00 -0700)]
Merge tag 'fbdev-for-6.5-rc3' of git://git./linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes and cleanups from Helge Deller:
 "Just the usual bunch of code cleanups in various drivers, this time
  mostly in vgacon and imxfb:

   - Code cleanup in vgacon (Jiri Slaby)

   - Explicitly include correct DT includes (Rob Herring)

   - imxfb code cleanup (Yangtao Li, Martin Kaiser)

   - kyrofb: make arrays const and smaller (Colin Ian King)

   - ep93xx-fb: return value check fix (Yuanjun Gong)

   - au1200fb: add missing IRQ check (Zhang Shurong)"

* tag 'fbdev-for-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: Explicitly include correct DT includes
  fbdev: ep93xx-fb: fix return value check in ep93xxfb_probe
  fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe
  fbdev: kyro: make some const read-only arrays static and reduce type size
  fbcon: remove unused display (p) from fbcon_redraw()
  sticon: make sticon_set_def_font() void and remove op parameter
  vgacon: cache vc_cell_height in vgacon_cursor()
  vgacon: let vgacon_doresize() return void
  vgacon: remove unused xpos from vgacon_set_cursor_size()
  vgacon: remove unneeded forward declarations
  vgacon: switch vgacon_scrolldelta() and vgacon_restore_screen()
  fbdev: imxfb: remove unneeded labels
  fbdev: imxfb: Convert to devm_platform_ioremap_resource()
  fbdev: imxfb: Convert to devm_kmalloc_array()
  fbdev: imxfb: Removed unneeded release_mem_region
  fbdev: imxfb: switch to DEFINE_SIMPLE_DEV_PM_OPS
  fbdev: imxfb: warn about invalid left/right margin

15 months agodrm/atomic: Fix potential use-after-free in nonblocking commits
Daniel Vetter [Fri, 21 Jul 2023 13:58:38 +0000 (15:58 +0200)]
drm/atomic: Fix potential use-after-free in nonblocking commits

This requires a bit of background.  Properly done a modeset driver's
unload/remove sequence should be

drm_dev_unplug();
drm_atomic_helper_shutdown();
drm_dev_put();

The trouble is that the drm_dev_unplugged() checks are by design racy,
they do not synchronize against all outstanding ioctl.  This is because
those ioctl could block forever (both for modeset and for driver
specific ioctls), leading to deadlocks in hotunplug.  Instead the code
sections that touch the hardware need to be annotated with
drm_dev_enter/exit, to avoid accessing hardware resources after the
unload/remove has finished.

To avoid use-after-free issues all the involved userspace visible
objects are supposed to hold a reference on the underlying drm_device,
like drm_file does.

The issue now is that we missed one, the atomic modeset ioctl can be run
in a nonblocking fashion, and in that case it cannot rely on the implied
drm_device reference provided by the ioctl calling context.  This can
result in a use-after-free if an nonblocking atomic commit is carefully
raced against a driver unload.

Fix this by unconditionally grabbing a drm_device reference for any
drm_atomic_state structures.  Strictly speaking this isn't required for
blocking commits and TEST_ONLY calls, but it's the simpler approach.

Thanks to shanzhulig for the initial idea of grabbing an unconditional
reference, I just added comments, a condensed commit message and fixed a
minor potential issue in where exactly we drop the final reference.

Reported-by: shanzhulig <shanzhulig@gmail.com>
Suggested-by: shanzhulig <shanzhulig@gmail.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 months agoia64: mmap: Consider pgoff when searching for free mapping
Helge Deller [Fri, 21 Jul 2023 15:24:32 +0000 (17:24 +0200)]
ia64: mmap: Consider pgoff when searching for free mapping

IA64 is the only architecture which does not consider the pgoff value when
searching for a possible free memory region with vm_unmapped_area().
Adding this seems to have no negative side effect on IA64, so add it now
to make IA64 consistent with all other architectures.

Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-ia64@vger.kernel.org
Link: https://lore.kernel.org/r/20230721152432.196382-3-deller@gmx.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoio_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()
Helge Deller [Fri, 21 Jul 2023 15:24:31 +0000 (17:24 +0200)]
io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()

The io_uring testcase is broken on IA-64 since commit d808459b2e31
("io_uring: Adjust mapping wrt architecture aliasing requirements").

The reason is, that this commit introduced an own architecture
independend get_unmapped_area() search algorithm which finds on IA-64 a
memory region which is outside of the regular memory region used for
shared userspace mappings and which can't be used on that platform
due to aliasing.

To avoid similar problems on IA-64 and other platforms in the future,
it's better to switch back to the architecture-provided
get_unmapped_area() function and adjust the needed input parameters
before the call. Beside fixing the issue, the function now becomes
easier to understand and maintain.

This patch has been successfully tested with the io_uring testcase on
physical x86-64, ppc64le, IA-64 and PA-RISC machines. On PA-RISC the LTP
mmmap testcases did not report any regressions.

Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Fixes: d808459b2e31 ("io_uring: Adjust mapping wrt architecture aliasing requirements")
Link: https://lore.kernel.org/r/20230721152432.196382-2-deller@gmx.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoarm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
Mark Brown [Thu, 20 Jul 2023 18:38:58 +0000 (19:38 +0100)]
arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes

When we reconfigure the SVE vector length we discard the backing storage
for the SVE vectors and then reallocate on next SVE use, leaving the SME
specific state alone. This means that we do not enable SME traps if they
were already disabled. That means that userspace code can enter streaming
mode without trapping, putting the task in a state where if we try to save
the state of the task we will fault.

Since the ABI does not specify that changing the SVE vector length disturbs
SME state, and since SVE code may not be aware of SME code in the process,
we shouldn't simply discard any ZA state. Instead immediately reallocate
the storage for SVE, and disable SME if we change the SVE vector length
while there is no SME state active.

Disabling SME traps on SVE vector length changes would make the overall
code more complex since we would have a state where we have valid SME state
stored but might get a SME trap.

Fixes: 9e4ab6c89109 ("arm64/sme: Implement vector length configuration prctl()s")
Reported-by: David Spickett <David.Spickett@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230720-arm64-fix-sve-sme-vl-change-v2-1-8eea06b82d57@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
15 months agoMerge tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 21 Jul 2023 03:35:38 +0000 (20:35 -0700)]
Merge tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Mostly amdgpu fixes, a couple of i915 fixes, some nouveau and then a
  few misc accel and other fixes.

  client:
   - memory leak fix

  dma-buf:
   - memory leak fix

  qaic:
   - bound check fixes
   - map_user_pages leak
   - int overflow fixes

  habanalabs:
   - debugfs stub helper

  nouveau:
   - aux event slot fixes
   - anx9805 cards fixes

  i915:
   - Add sentinel to xehp_oa_b_counters
   - Revert "drm/i915: use localized __diag_ignore_all() instead of per
     file"

  amdgpu:
   - More PCIe DPM fixes for Intel platforms
   - DCN3.0.1 fixes
   - Virtual display timer fix
   - Async flip fix
   - SMU13 clock reporting fixes
   - Add missing PSP firmware declaration
   - DP MST fix
   - DCN3.1.x fixes
   - Slab out of bounds fix"

* tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm: (31 commits)
  accel/habanalabs: add more debugfs stub helpers
  drm/nouveau/kms/nv50-: init hpd_irq_lock for PIOR DP
  drm/nouveau/disp: PIOR DP uses GPIO for HPD, not PMGR AUX interrupts
  drm/nouveau/i2c: fix number of aux event slots
  drm/amdgpu: use a macro to define no xcp partition case
  drm/amdgpu/vm: use the same xcp_id from root PD
  drm/amdgpu: fix slab-out-of-bounds issue in amdgpu_vm_pt_create
  drm/amdgpu: Allocate root PD on correct partition
  drm/amd/display: Keep PHY active for DP displays on DCN31
  drm/amd/display: Prevent vtotal from being set to 0
  drm/amd/display: Disable MPC split by default on special asic
  drm/amd/display: check TG is non-null before checking if enabled
  drm/amd/display: Add polling method to handle MST reply packet
  drm/amd/display: Clean up errors & warnings in amdgpu_dm.c
  drm/amdgpu: Allow the initramfs generator to include psp_13_0_6_ta
  drm/amdgpu/pm: make mclk consistent for smu 13.0.7
  drm/amdgpu/pm: make gfxclock consistent for sienna cichlid
  drm/amd/display: only accept async flips for fast updates
  drm/amdgpu/vkms: relax timer deactivation by hrtimer_try_to_cancel
  drm/amd/display: add DCN301 specific logic for OTG programming
  ...

15 months agoMerge tag 'amd-drm-fixes-6.5-2023-07-20' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 21 Jul 2023 02:16:41 +0000 (12:16 +1000)]
Merge tag 'amd-drm-fixes-6.5-2023-07-20' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.5-2023-07-20:

amdgpu:
- More PCIe DPM fixes for Intel platforms
- DCN3.0.1 fixes
- Virtual display timer fix
- Async flip fix
- SMU13 clock reporting fixes
- Add missing PSP firmware declaration
- DP MST fix
- DCN3.1.x fixes
- Slab out of bounds fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230720133456.7826-1-alexander.deucher@amd.com
15 months agoMerge tag 'drm-intel-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 21 Jul 2023 02:15:09 +0000 (12:15 +1000)]
Merge tag 'drm-intel-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Add sentinel to xehp_oa_b_counters [perf] (Andrzej Hajda)
- Revert "drm/i915: use localized __diag_ignore_all() instead of per file" (Jani Nikula)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZLjuwhLhwab5B7RY@tursulin-desk
15 months agoMerge tag 'drm-misc-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 21 Jul 2023 02:02:31 +0000 (12:02 +1000)]
Merge tag 'drm-misc-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Memory leak fixes in drm/client, memory access/leak fixes for
accel/qaic, another leak fix in dma-buf and three nouveau fixes around
hotplugging.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fmj5nok7zggux2lcpdtls2iknweba54wfc6o4zxq6i6s3dgi2r@7z3eawwhyhen
15 months agoMerge tag 'ata-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Fri, 21 Jul 2023 02:10:50 +0000 (19:10 -0700)]
Merge tag 'ata-6.5-rc3' of git://git./linux/kernel/git/dlemoal/libata

Pull ata fix from Damien Le Moal:

 - Add missing MODULE_DESCRIPTION() in the many of the protocol modules
   for the pata_parport driver to avoid compilation warnings with "make
   W=1".

* tag 'ata-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: pata_parport: Add missing protocol modules description

15 months agoMerge tag 'net-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 20 Jul 2023 21:46:39 +0000 (14:46 -0700)]
Merge tag 'net-6.5-rc3' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from BPF, netfilter, bluetooth and CAN.

  Current release - regressions:

   - eth: r8169: multiple fixes for PCIe ASPM-related problems

   - vrf: fix RCU lockdep splat in output path

  Previous releases - regressions:

   - gso: fall back to SW segmenting with GSO_UDP_L4 dodgy bit set

   - dsa: mv88e6xxx: do a final check before timing out when polling

   - nf_tables: fix sleep in atomic in nft_chain_validate

  Previous releases - always broken:

   - sched: fix undoing tcf_bind_filter() in multiple classifiers

   - bpf, arm64: fix BTI type used for freplace attached functions

   - can: gs_usb: fix time stamp counter initialization

   - nft_set_pipapo: fix improper element removal (leading to UAF)

  Misc:

   - net: support STP on bridge in non-root netns, STP prevents packet
     loops so not supporting it results in freezing systems of
     unsuspecting users, and in turn very upset noises being made

   - fix kdoc warnings

   - annotate various bits of TCP state to prevent data races"

* tag 'net-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (95 commits)
  net: phy: prevent stale pointer dereference in phy_init()
  tcp: annotate data-races around fastopenq.max_qlen
  tcp: annotate data-races around icsk->icsk_user_timeout
  tcp: annotate data-races around tp->notsent_lowat
  tcp: annotate data-races around rskq_defer_accept
  tcp: annotate data-races around tp->linger2
  tcp: annotate data-races around icsk->icsk_syn_retries
  tcp: annotate data-races around tp->keepalive_probes
  tcp: annotate data-races around tp->keepalive_intvl
  tcp: annotate data-races around tp->keepalive_time
  tcp: annotate data-races around tp->tsoffset
  tcp: annotate data-races around tp->tcp_tx_delay
  Bluetooth: MGMT: Use correct address for memcpy()
  Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014
  Bluetooth: SCO: fix sco_conn related locking and validity issues
  Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link
  Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()
  Bluetooth: coredump: fix building with coredump disabled
  Bluetooth: ISO: fix iso_conn related locking and validity issues
  Bluetooth: hci_event: call disconnect callback before deleting conn
  ...

15 months agoblk-iocost: skip empty flush bio in iocost
Chengming Zhou [Thu, 20 Jul 2023 12:14:41 +0000 (20:14 +0800)]
blk-iocost: skip empty flush bio in iocost

The flush bio may have data, may have no data (empty flush), we couldn't
calculate cost for empty flush bio. So we'd better just skip it for now.

Another side effect is that empty flush bio's bio_end_sector() is 0, cause
iocg->cursor reset to 0, may break the cost calculation of other bios.

This isn't good enough, since flush bio still consume the device bandwidth,
but flush request is special, can be merged randomly in the flush state
machine, we don't know how to calculate cost for it for now.

Its completion time also has flaws, which may include the pre-flush or
post-flush completion time, but I don't know if we need to fix that and
how to fix it.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230720121441.1408522-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoMerge tag 'for-net-2023-07-20' of git://git.kernel.org/pub/scm/linux/kernel/git/bluet...
Jakub Kicinski [Thu, 20 Jul 2023 19:57:55 +0000 (12:57 -0700)]
Merge tag 'for-net-2023-07-20' of git://git./linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - Fix building with coredump disabled
 - Fix use-after-free in hci_remove_adv_monitor
 - Use RCU for hci_conn_params and iterate safely in hci_sync
 - Fix locking issues on ISO and SCO
 - Fix bluetooth on Intel Macbook 2014

* tag 'for-net-2023-07-20' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: MGMT: Use correct address for memcpy()
  Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014
  Bluetooth: SCO: fix sco_conn related locking and validity issues
  Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link
  Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()
  Bluetooth: coredump: fix building with coredump disabled
  Bluetooth: ISO: fix iso_conn related locking and validity issues
  Bluetooth: hci_event: call disconnect callback before deleting conn
  Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
====================

Link: https://lore.kernel.org/r/20230720190201.446469-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge tag 'nf-23-07-20' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Jakub Kicinski [Thu, 20 Jul 2023 19:54:21 +0000 (12:54 -0700)]
Merge tag 'nf-23-07-20' of https://git./linux/kernel/git/netfilter/nf

Florian Westphal says:

====================
Netfilter fixes for net:

The following patchset contains Netfilter fixes for net:

1. Fix spurious -EEXIST error from userspace due to
   padding holes, this was broken since 4.9 days
   when 'ignore duplicate entries on insert' feature was
   added.

2. Fix a sched-while-atomic bug, present since 5.19.

3. Properly remove elements if they lack an "end range".
   nft userspace always sets an end range attribute, even
   when its the same as the start, but the abi doesn't
   have such a restriction. Always broken since it was
   added in 5.6, all three from myself.

4 + 5: Bound chain needs to be skipped in netns release
   and on rule flush paths, from Pablo Neira.

* tag 'nf-23-07-20' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nf_tables: skip bound chain on rule flush
  netfilter: nf_tables: skip bound chain in netns release path
  netfilter: nft_set_pipapo: fix improper element removal
  netfilter: nf_tables: can't schedule in nft_chain_validate
  netfilter: nf_tables: fix spurious set element insertion failure
====================

Link: https://lore.kernel.org/r/20230720165143.30208-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: phy: prevent stale pointer dereference in phy_init()
Vladimir Oltean [Thu, 20 Jul 2023 00:02:31 +0000 (03:02 +0300)]
net: phy: prevent stale pointer dereference in phy_init()

mdio_bus_init() and phy_driver_register() both have error paths, and if
those are ever hit, ethtool will have a stale pointer to the
phy_ethtool_phy_ops stub structure, which references memory from a
module that failed to load (phylib).

It is probably hard to force an error in this code path even manually,
but the error teardown path of phy_init() should be the same as
phy_exit(), which is now simply not the case.

Fixes: 55d8f053ce1b ("net: phy: Register ethtool PHY operations")
Link: https://lore.kernel.org/netdev/ZLaiJ4G6TaJYGJyU@shell.armlinux.org.uk/
Suggested-by: Russell King (Oracle) <linux@armlinux.org.uk>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230720000231.1939689-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge branch 'tcp-add-missing-annotations'
Jakub Kicinski [Thu, 20 Jul 2023 19:34:24 +0000 (12:34 -0700)]
Merge branch 'tcp-add-missing-annotations'

Eric Dumazet says:

====================
tcp: add missing annotations

This series was inspired by one syzbot (KCSAN) report.

do_tcp_getsockopt() does not lock the socket, we need to
annotate most of the reads there (and other places as well).

This is a first round, another series will come later.
====================

Link: https://lore.kernel.org/r/20230719212857.3943972-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around fastopenq.max_qlen
Eric Dumazet [Wed, 19 Jul 2023 21:28:57 +0000 (21:28 +0000)]
tcp: annotate data-races around fastopenq.max_qlen

This field can be read locklessly.

Fixes: 1536e2857bd3 ("tcp: Add a TCP_FASTOPEN socket option to get a max backlog on its listner")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-12-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around icsk->icsk_user_timeout
Eric Dumazet [Wed, 19 Jul 2023 21:28:56 +0000 (21:28 +0000)]
tcp: annotate data-races around icsk->icsk_user_timeout

This field can be read locklessly from do_tcp_getsockopt()

Fixes: dca43c75e7e5 ("tcp: Add TCP_USER_TIMEOUT socket option.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-11-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->notsent_lowat
Eric Dumazet [Wed, 19 Jul 2023 21:28:55 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->notsent_lowat

tp->notsent_lowat can be read locklessly from do_tcp_getsockopt()
and tcp_poll().

Fixes: c9bee3b7fdec ("tcp: TCP_NOTSENT_LOWAT socket option")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-10-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around rskq_defer_accept
Eric Dumazet [Wed, 19 Jul 2023 21:28:54 +0000 (21:28 +0000)]
tcp: annotate data-races around rskq_defer_accept

do_tcp_getsockopt() reads rskq_defer_accept while another cpu
might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-9-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->linger2
Eric Dumazet [Wed, 19 Jul 2023 21:28:53 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->linger2

do_tcp_getsockopt() reads tp->linger2 while another cpu
might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-8-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around icsk->icsk_syn_retries
Eric Dumazet [Wed, 19 Jul 2023 21:28:52 +0000 (21:28 +0000)]
tcp: annotate data-races around icsk->icsk_syn_retries

do_tcp_getsockopt() and reqsk_timer_handler() read
icsk->icsk_syn_retries while another cpu might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-7-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->keepalive_probes
Eric Dumazet [Wed, 19 Jul 2023 21:28:51 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->keepalive_probes

do_tcp_getsockopt() reads tp->keepalive_probes while another cpu
might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->keepalive_intvl
Eric Dumazet [Wed, 19 Jul 2023 21:28:50 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->keepalive_intvl

do_tcp_getsockopt() reads tp->keepalive_intvl while another cpu
might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->keepalive_time
Eric Dumazet [Wed, 19 Jul 2023 21:28:49 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->keepalive_time

do_tcp_getsockopt() reads tp->keepalive_time while another cpu
might change its value.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-4-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->tsoffset
Eric Dumazet [Wed, 19 Jul 2023 21:28:48 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->tsoffset

do_tcp_getsockopt() reads tp->tsoffset while another cpu
might change its value.

Fixes: 93be6ce0e91b ("tcp: set and get per-socket timestamp")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agotcp: annotate data-races around tp->tcp_tx_delay
Eric Dumazet [Wed, 19 Jul 2023 21:28:47 +0000 (21:28 +0000)]
tcp: annotate data-races around tp->tcp_tx_delay

do_tcp_getsockopt() reads tp->tcp_tx_delay while another cpu
might change its value.

Fixes: a842fe1425cb ("tcp: add optional per socket transmit delay")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719212857.3943972-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoblk-mq: delete dead struct blk_mq_hw_ctx->queued field
Chengming Zhou [Thu, 20 Jul 2023 09:55:12 +0000 (17:55 +0800)]
blk-mq: delete dead struct blk_mq_hw_ctx->queued field

This counter is not used anywhere, so delete it.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230720095512.1403123-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoio_uring: treat -EAGAIN for REQ_F_NOWAIT as final for io-wq
Jens Axboe [Thu, 20 Jul 2023 19:16:53 +0000 (13:16 -0600)]
io_uring: treat -EAGAIN for REQ_F_NOWAIT as final for io-wq

io-wq assumes that an issue is blocking, but it may not be if the
request type has asked for a non-blocking attempt. If we get
-EAGAIN for that case, then we need to treat it as a final result
and not retry or arm poll for it.

Cc: stable@vger.kernel.org # 5.10+
Link: https://github.com/axboe/liburing/issues/897
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoBluetooth: MGMT: Use correct address for memcpy()
Andy Shevchenko [Mon, 17 Jul 2023 09:32:14 +0000 (12:32 +0300)]
Bluetooth: MGMT: Use correct address for memcpy()

In function ‘fortify_memcpy_chk’,
    inlined from ‘get_conn_info_complete’ at net/bluetooth/mgmt.c:7281:2:
include/linux/fortify-string.h:592:25: error: call to
‘__read_overflow2_field’ declared with attribute warning: detected read
beyond size of field (2nd parameter); maybe use struct_group()?
[-Werror=attribute-warning]
  592 |                         __read_overflow2_field(q_size_field, size);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

This is due to the wrong member is used for memcpy(). Use correct one.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: btusb: Fix bluetooth on Intel Macbook 2014
Tomasz Moń [Thu, 13 Jul 2023 10:25:14 +0000 (12:25 +0200)]
Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014

Commit c13380a55522 ("Bluetooth: btusb: Do not require hardcoded
interface numbers") inadvertedly broke bluetooth on Intel Macbook 2014.
The intention was to keep behavior intact when BTUSB_IFNUM_2 is set and
otherwise allow any interface numbers. The problem is that the new logic
condition omits the case where bInterfaceNumber is 0.

Fix BTUSB_IFNUM_2 handling by allowing both interface number 0 and 2
when the flag is set.

Fixes: c13380a55522 ("Bluetooth: btusb: Do not require hardcoded interface numbers")
Reported-by: John Holland <johnbholland@icloud.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217651
Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
Tested-by: John Holland<johnbholland@icloud.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: SCO: fix sco_conn related locking and validity issues
Pauli Virtanen [Mon, 10 Jul 2023 16:48:19 +0000 (19:48 +0300)]
Bluetooth: SCO: fix sco_conn related locking and validity issues

Operations that check/update sk_state and access conn should hold
lock_sock, otherwise they can race.

The order of taking locks is hci_dev_lock > lock_sock > sco_conn_lock,
which is how it is in connect/disconnect_cfm -> sco_conn_del ->
sco_chan_del.

Fix locking in sco_connect to take lock_sock around updating sk_state
and conn.

sco_conn_del must not occur during sco_connect, as it frees the
sco_conn. Hold hdev->lock longer to prevent that.

sco_conn_add shall return sco_conn with valid hcon. Make it so also when
reusing an old SCO connection waiting for disconnect timeout (see
__sco_sock_close where conn->hcon is set to NULL).

This should not reintroduce the issue fixed in the earlier
commit 9a8ec9e8ebb5 ("Bluetooth: SCO: Fix possible circular locking
dependency on sco_connect_cfm"), the relevant fix of releasing lock_sock
in sco_sock_connect before acquiring hdev->lock is retained.

These changes mirror similar fixes earlier in ISO sockets.

Fixes: 9a8ec9e8ebb5 ("Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link
Siddh Raman Pant [Tue, 11 Jul 2023 13:13:53 +0000 (18:43 +0530)]
Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link

hci_connect_sco currently returns NULL when there is no link (i.e. when
hci_conn_link() returns NULL).

sco_connect() expects an ERR_PTR in case of any error (see line 266 in
sco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which
tries to get hcon->hdev, resulting in dereferencing a NULL pointer as
reported by syzkaller.

The same issue exists for iso_connect_cis() calling hci_connect_cis().

Thus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR
instead of NULL.

Reported-and-tested-by: syzbot+37acd5d80d00d609d233@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=37acd5d80d00d609d233
Fixes: 06149746e720 ("Bluetooth: hci_conn: Add support for linking multiple hcon")
Signed-off-by: Siddh Raman Pant <code@siddh.me>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()
Douglas Anderson [Fri, 30 Jun 2023 22:33:14 +0000 (15:33 -0700)]
Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()

KASAN reports that there's a use-after-free in
hci_remove_adv_monitor(). Trawling through the disassembly, you can
see that the complaint is from the access in bt_dev_dbg() under the
HCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because
msft_remove_monitor() can end up freeing the monitor
structure. Specifically:
  hci_remove_adv_monitor() ->
  msft_remove_monitor() ->
  msft_remove_monitor_sync() ->
  msft_le_cancel_monitor_advertisement_cb() ->
  hci_free_adv_monitor()

Let's fix the problem by just stashing the relevant data when it's
still valid.

Fixes: 7cf5c2978f23 ("Bluetooth: hci_sync: Refactor remove Adv Monitor")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: coredump: fix building with coredump disabled
Arnd Bergmann [Mon, 3 Jul 2023 11:30:48 +0000 (13:30 +0200)]
Bluetooth: coredump: fix building with coredump disabled

The btmtk driver uses an IS_ENABLED() check to conditionally compile
the coredump support, but this fails to build because the hdev->dump
member is in an #ifdef:

drivers/bluetooth/btmtk.c: In function 'btmtk_process_coredump':
drivers/bluetooth/btmtk.c:386:30: error: 'struct hci_dev' has no member named 'dump'
  386 |   schedule_delayed_work(&hdev->dump.dump_timeout,
      |                              ^~

The struct member doesn't really make a huge difference in the total size,
so just remove the #ifdef around it to avoid adding similar checks
around each user.

Fixes: 872f8c253cb9e ("Bluetooth: btusb: mediatek: add MediaTek devcoredump support")
Fixes: 9695ef876fd12 ("Bluetooth: Add support for hci devcoredump")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: ISO: fix iso_conn related locking and validity issues
Pauli Virtanen [Sun, 18 Jun 2023 22:04:33 +0000 (01:04 +0300)]
Bluetooth: ISO: fix iso_conn related locking and validity issues

sk->sk_state indicates whether iso_pi(sk)->conn is valid. Operations
that check/update sk_state and access conn should hold lock_sock,
otherwise they can race.

The order of taking locks is hci_dev_lock > lock_sock > iso_conn_lock,
which is how it is in connect/disconnect_cfm -> iso_conn_del ->
iso_chan_del.

Fix locking in iso_connect_cis/bis and sendmsg/recvmsg to take lock_sock
around updating sk_state and conn.

iso_conn_del must not occur during iso_connect_cis/bis, as it frees the
iso_conn. Hold hdev->lock longer to prevent that.

This should not reintroduce the issue fixed in commit 241f51931c35
("Bluetooth: ISO: Avoid circular locking dependency"), since the we
acquire locks in order. We retain the fix in iso_sock_connect to release
lock_sock before iso_connect_* acquires hdev->lock.

Similarly for commit 6a5ad251b7cd ("Bluetooth: ISO: Fix possible
circular locking dependency"). We retain the fix in iso_conn_ready to
not acquire iso_conn_lock before lock_sock.

iso_conn_add shall return iso_conn with valid hcon. Make it so also when
reusing an old CIS connection waiting for disconnect timeout (see
__iso_sock_close where conn->hcon is set to NULL).

Trace with iso_conn_del after iso_chan_add in iso_connect_cis:
===============================================================
iso_sock_create:771: sock 00000000be9b69b7
iso_sock_init:693: sk 000000004dff667e
iso_sock_bind:827: sk 000000004dff667e 70:1a:b8:98:ff:a2 type 1
iso_sock_setsockopt:1289: sk 000000004dff667e
iso_sock_setsockopt:1289: sk 000000004dff667e
iso_sock_setsockopt:1289: sk 000000004dff667e
iso_sock_connect:875: sk 000000004dff667e
iso_connect_cis:353: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da
hci_get_route:1199: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da
hci_conn_add:1005: hci0 dst 28:3d:c2:4a:7e:da
iso_conn_add:140: hcon 000000007b65d182 conn 00000000daf8625e
__iso_chan_add:214: conn 00000000daf8625e
iso_connect_cfm:1700: hcon 000000007b65d182 bdaddr 28:3d:c2:4a:7e:da status 12
iso_conn_del:187: hcon 000000007b65d182 conn 00000000daf8625e, err 16
iso_sock_clear_timer:117: sock 000000004dff667e state 3
    <Note: sk_state is BT_BOUND (3), so iso_connect_cis is still
    running at this point>
iso_chan_del:153: sk 000000004dff667e, conn 00000000daf8625e, err 16
hci_conn_del:1151: hci0 hcon 000000007b65d182 handle 65535
hci_conn_unlink:1102: hci0: hcon 000000007b65d182
hci_chan_list_flush:2780: hcon 000000007b65d182
iso_sock_getsockopt:1376: sk 000000004dff667e
iso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e
iso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e
iso_sock_getsockopt:1376: sk 000000004dff667e
iso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e
iso_sock_getname:1070: sock 00000000be9b69b7, sk 000000004dff667e
iso_sock_shutdown:1434: sock 00000000be9b69b7, sk 000000004dff667e, how 1
__iso_sock_close:632: sk 000000004dff667e state 5 socket 00000000be9b69b7
     <Note: sk_state is BT_CONNECT (5), even though iso_chan_del sets
     BT_CLOSED (6). Only iso_connect_cis sets it to BT_CONNECT, so it
     must be that iso_chan_del occurred between iso_chan_add and end of
     iso_connect_cis.>
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD 8000000006467067 P4D 8000000006467067 PUD 3f5f067 PMD 0
Oops: 0000 [#1] PREEMPT SMP PTI
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
RIP: 0010:__iso_sock_close (net/bluetooth/iso.c:664) bluetooth
===============================================================

Trace with iso_conn_del before iso_chan_add in iso_connect_cis:
===============================================================
iso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da
...
iso_conn_add:140: hcon 0000000093bc551f conn 00000000768ae504
hci_dev_put:1487: hci0 orig refcnt 21
hci_event_packet:7607: hci0: event 0x0e
hci_cmd_complete_evt:4231: hci0: opcode 0x2062
hci_cc_le_set_cig_params:3846: hci0: status 0x07
hci_sent_cmd_data:3107: hci0 opcode 0x2062
iso_connect_cfm:1703: hcon 0000000093bc551f bdaddr 28:3d:c2:4a:7e:da status 7
iso_conn_del:187: hcon 0000000093bc551f conn 00000000768ae504, err 12
hci_conn_del:1151: hci0 hcon 0000000093bc551f handle 65535
hci_conn_unlink:1102: hci0: hcon 0000000093bc551f
hci_chan_list_flush:2780: hcon 0000000093bc551f
__iso_chan_add:214: conn 00000000768ae504
    <Note: this conn was already freed in iso_conn_del above>
iso_sock_clear_timer:117: sock 0000000098323f95 state 3
general protection fault, probably for non-canonical address 0x30b29c630930aec8: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 1920 Comm: bluetoothd Tainted: G            E      6.3.0-rc7+ #4
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
RIP: 0010:detach_if_pending+0x28/0xd0
Code: 90 90 0f 1f 44 00 00 48 8b 47 08 48 85 c0 0f 84 ad 00 00 00 55 89 d5 53 48 83 3f 00 48 89 fb 74 7d 66 90 48 8b 03 48 8b 53 08 <>
RSP: 0018:ffffb90841a67d08 EFLAGS: 00010007
RAX: 0000000000000000 RBX: ffff9141bd5061b8 RCX: 0000000000000000
RDX: 30b29c630930aec8 RSI: ffff9141fdd21e80 RDI: ffff9141bd5061b8
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffb90841a67b88
R10: 0000000000000003 R11: ffffffff8613f558 R12: ffff9141fdd21e80
R13: 0000000000000000 R14: ffff9141b5976010 R15: ffff914185755338
FS:  00007f45768bd840(0000) GS:ffff9141fdd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000619000424074 CR3: 0000000009f5e005 CR4: 0000000000170ee0
Call Trace:
 <TASK>
 timer_delete+0x48/0x80
 try_to_grab_pending+0xdf/0x170
 __cancel_work+0x37/0xb0
 iso_connect_cis+0x141/0x400 [bluetooth]
===============================================================

Trace with NULL conn->hcon in state BT_CONNECT:
===============================================================
__iso_sock_close:619: sk 00000000f7c71fc5 state 1 socket 00000000d90c5fe5
...
__iso_sock_close:619: sk 00000000f7c71fc5 state 8 socket 00000000d90c5fe5
iso_chan_del:153: sk 00000000f7c71fc5, conn 0000000022c03a7e, err 104
...
iso_sock_connect:862: sk 00000000129b56c3
iso_connect_cis:348: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7d:2a
hci_get_route:1199: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7d:2a
hci_dev_hold:1495: hci0 orig refcnt 19
__iso_chan_add:214: conn 0000000022c03a7e
    <Note: reusing old conn>
iso_sock_clear_timer:117: sock 00000000129b56c3 state 3
...
iso_sock_ready:1485: sk 00000000129b56c3
...
iso_sock_sendmsg:1077: sock 00000000e5013966, sk 00000000129b56c3
BUG: kernel NULL pointer dereference, address: 00000000000006a8
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 1403 Comm: wireplumber Tainted: G            E      6.3.0-rc7+ #4
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
RIP: 0010:iso_sock_sendmsg+0x63/0x2a0 [bluetooth]
===============================================================

Fixes: 241f51931c35 ("Bluetooth: ISO: Avoid circular locking dependency")
Fixes: 6a5ad251b7cd ("Bluetooth: ISO: Fix possible circular locking dependency")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: hci_event: call disconnect callback before deleting conn
Pauli Virtanen [Sun, 18 Jun 2023 22:04:32 +0000 (01:04 +0300)]
Bluetooth: hci_event: call disconnect callback before deleting conn

In hci_cs_disconnect, we do hci_conn_del even if disconnection failed.

ISO, L2CAP and SCO connections refer to the hci_conn without
hci_conn_get, so disconn_cfm must be called so they can clean up their
conn, otherwise use-after-free occurs.

ISO:
==========================================================
iso_sock_connect:880: sk 00000000eabd6557
iso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da
...
iso_conn_add:140: hcon 000000001696f1fd conn 00000000b6251073
hci_dev_put:1487: hci0 orig refcnt 17
__iso_chan_add:214: conn 00000000b6251073
iso_sock_clear_timer:117: sock 00000000eabd6557 state 3
...
hci_rx_work:4085: hci0 Event packet
hci_event_packet:7601: hci0: event 0x0f
hci_cmd_status_evt:4346: hci0: opcode 0x0406
hci_cs_disconnect:2760: hci0: status 0x0c
hci_sent_cmd_data:3107: hci0 opcode 0x0406
hci_conn_del:1151: hci0 hcon 000000001696f1fd handle 2560
hci_conn_unlink:1102: hci0: hcon 000000001696f1fd
hci_conn_drop:1451: hcon 00000000d8521aaf orig refcnt 2
hci_chan_list_flush:2780: hcon 000000001696f1fd
hci_dev_put:1487: hci0 orig refcnt 21
hci_dev_put:1487: hci0 orig refcnt 20
hci_req_cmd_complete:3978: opcode 0x0406 status 0x0c
... <no iso_* activity on sk/conn> ...
iso_sock_sendmsg:1098: sock 00000000dea5e2e0, sk 00000000eabd6557
BUG: kernel NULL pointer dereference, address: 0000000000000668
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP PTI
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
RIP: 0010:iso_sock_sendmsg (net/bluetooth/iso.c:1112) bluetooth
==========================================================

L2CAP:
==================================================================
hci_cmd_status_evt:4359: hci0: opcode 0x0406
hci_cs_disconnect:2760: hci0: status 0x0c
hci_sent_cmd_data:3085: hci0 opcode 0x0406
hci_conn_del:1151: hci0 hcon ffff88800c999000 handle 3585
hci_conn_unlink:1102: hci0: hcon ffff88800c999000
hci_chan_list_flush:2780: hcon ffff88800c999000
hci_chan_del:2761: hci0 hcon ffff88800c999000 chan ffff888018ddd280
...
BUG: KASAN: slab-use-after-free in hci_send_acl+0x2d/0x540 [bluetooth]
Read of size 8 at addr ffff888018ddd298 by task bluetoothd/1175

CPU: 0 PID: 1175 Comm: bluetoothd Tainted: G            E      6.4.0-rc4+ #2
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x5b/0x90
 print_report+0xcf/0x670
 ? __virt_addr_valid+0xf8/0x180
 ? hci_send_acl+0x2d/0x540 [bluetooth]
 kasan_report+0xa8/0xe0
 ? hci_send_acl+0x2d/0x540 [bluetooth]
 hci_send_acl+0x2d/0x540 [bluetooth]
 ? __pfx___lock_acquire+0x10/0x10
 l2cap_chan_send+0x1fd/0x1300 [bluetooth]
 ? l2cap_sock_sendmsg+0xf2/0x170 [bluetooth]
 ? __pfx_l2cap_chan_send+0x10/0x10 [bluetooth]
 ? lock_release+0x1d5/0x3c0
 ? mark_held_locks+0x1a/0x90
 l2cap_sock_sendmsg+0x100/0x170 [bluetooth]
 sock_write_iter+0x275/0x280
 ? __pfx_sock_write_iter+0x10/0x10
 ? __pfx___lock_acquire+0x10/0x10
 do_iter_readv_writev+0x176/0x220
 ? __pfx_do_iter_readv_writev+0x10/0x10
 ? find_held_lock+0x83/0xa0
 ? selinux_file_permission+0x13e/0x210
 do_iter_write+0xda/0x340
 vfs_writev+0x1b4/0x400
 ? __pfx_vfs_writev+0x10/0x10
 ? __seccomp_filter+0x112/0x750
 ? populate_seccomp_data+0x182/0x220
 ? __fget_light+0xdf/0x100
 ? do_writev+0x19d/0x210
 do_writev+0x19d/0x210
 ? __pfx_do_writev+0x10/0x10
 ? mark_held_locks+0x1a/0x90
 do_syscall_64+0x60/0x90
 ? lockdep_hardirqs_on_prepare+0x149/0x210
 ? do_syscall_64+0x6c/0x90
 ? lockdep_hardirqs_on_prepare+0x149/0x210
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff45cb23e64
Code: 15 d1 1f 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 80 3d 9d a7 0d 00 00 74 13 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 89 54 24 1c 48 89
RSP: 002b:00007fff21ae09b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007ff45cb23e64
RDX: 0000000000000001 RSI: 00007fff21ae0aa0 RDI: 0000000000000017
RBP: 00007fff21ae0aa0 R08: 000000000095a8a0 R09: 0000607000053f40
R10: 0000000000000001 R11: 0000000000000202 R12: 00007fff21ae0ac0
R13: 00000fffe435c150 R14: 00007fff21ae0a80 R15: 000060f000000040
 </TASK>

Allocated by task 771:
 kasan_save_stack+0x33/0x60
 kasan_set_track+0x25/0x30
 __kasan_kmalloc+0xaa/0xb0
 hci_chan_create+0x67/0x1b0 [bluetooth]
 l2cap_conn_add.part.0+0x17/0x590 [bluetooth]
 l2cap_connect_cfm+0x266/0x6b0 [bluetooth]
 hci_le_remote_feat_complete_evt+0x167/0x310 [bluetooth]
 hci_event_packet+0x38d/0x800 [bluetooth]
 hci_rx_work+0x287/0xb20 [bluetooth]
 process_one_work+0x4f7/0x970
 worker_thread+0x8f/0x620
 kthread+0x17f/0x1c0
 ret_from_fork+0x2c/0x50

Freed by task 771:
 kasan_save_stack+0x33/0x60
 kasan_set_track+0x25/0x30
 kasan_save_free_info+0x2e/0x50
 ____kasan_slab_free+0x169/0x1c0
 slab_free_freelist_hook+0x9e/0x1c0
 __kmem_cache_free+0xc0/0x310
 hci_chan_list_flush+0x46/0x90 [bluetooth]
 hci_conn_cleanup+0x7d/0x330 [bluetooth]
 hci_cs_disconnect+0x35d/0x530 [bluetooth]
 hci_cmd_status_evt+0xef/0x2b0 [bluetooth]
 hci_event_packet+0x38d/0x800 [bluetooth]
 hci_rx_work+0x287/0xb20 [bluetooth]
 process_one_work+0x4f7/0x970
 worker_thread+0x8f/0x620
 kthread+0x17f/0x1c0
 ret_from_fork+0x2c/0x50
==================================================================

Fixes: b8d290525e39 ("Bluetooth: clean up connection in hci_cs_disconnect")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
Pauli Virtanen [Sun, 18 Jun 2023 22:04:31 +0000 (01:04 +0300)]
Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync

hci_update_accept_list_sync iterates over hdev->pend_le_conns and
hdev->pend_le_reports, and waits for controller events in the loop body,
without holding hdev lock.

Meanwhile, these lists and the items may be modified e.g. by
le_scan_cleanup. This can invalidate the list cursor or any other item
in the list, resulting to invalid behavior (eg use-after-free).

Use RCU for the hci_conn_params action lists. Since the loop bodies in
hci_sync block and we cannot use RCU or hdev->lock for the whole loop,
copy list items first and then iterate on the copy. Only the flags field
is written from elsewhere, so READ_ONCE/WRITE_ONCE should guarantee we
read valid values.

Free params everywhere with hci_conn_params_free so the cleanup is
guaranteed to be done properly.

This fixes the following, which can be triggered e.g. by BlueZ new
mgmt-tester case "Add + Remove Device Nowait - Success", or by changing
hci_le_set_cig_params to always return false, and running iso-tester:

==================================================================
BUG: KASAN: slab-use-after-free in hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)
Read of size 8 at addr ffff888001265018 by task kworker/u3:0/32

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014
Workqueue: hci0 hci_cmd_sync_work
Call Trace:
<TASK>
dump_stack_lvl (./arch/x86/include/asm/irqflags.h:134 lib/dump_stack.c:107)
print_report (mm/kasan/report.c:320 mm/kasan/report.c:430)
? __virt_addr_valid (./include/linux/mmzone.h:1915 ./include/linux/mmzone.h:2011 arch/x86/mm/physaddr.c:65)
? hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)
kasan_report (mm/kasan/report.c:538)
? hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)
hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)
? __pfx_hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2780)
? mutex_lock (kernel/locking/mutex.c:282)
? __pfx_mutex_lock (kernel/locking/mutex.c:282)
? __pfx_mutex_unlock (kernel/locking/mutex.c:538)
? __pfx_update_passive_scan_sync (net/bluetooth/hci_sync.c:2861)
hci_cmd_sync_work (net/bluetooth/hci_sync.c:306)
process_one_work (./arch/x86/include/asm/preempt.h:27 kernel/workqueue.c:2399)
worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2538)
? __pfx_worker_thread (kernel/workqueue.c:2480)
kthread (kernel/kthread.c:376)
? __pfx_kthread (kernel/kthread.c:331)
ret_from_fork (arch/x86/entry/entry_64.S:314)
</TASK>

Allocated by task 31:
kasan_save_stack (mm/kasan/common.c:46)
kasan_set_track (mm/kasan/common.c:52)
__kasan_kmalloc (mm/kasan/common.c:374 mm/kasan/common.c:383)
hci_conn_params_add (./include/linux/slab.h:580 ./include/linux/slab.h:720 net/bluetooth/hci_core.c:2277)
hci_connect_le_scan (net/bluetooth/hci_conn.c:1419 net/bluetooth/hci_conn.c:1589)
hci_connect_cis (net/bluetooth/hci_conn.c:2266)
iso_connect_cis (net/bluetooth/iso.c:390)
iso_sock_connect (net/bluetooth/iso.c:899)
__sys_connect (net/socket.c:2003 net/socket.c:2020)
__x64_sys_connect (net/socket.c:2027)
do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)

Freed by task 15:
kasan_save_stack (mm/kasan/common.c:46)
kasan_set_track (mm/kasan/common.c:52)
kasan_save_free_info (mm/kasan/generic.c:523)
__kasan_slab_free (mm/kasan/common.c:238 mm/kasan/common.c:200 mm/kasan/common.c:244)
__kmem_cache_free (mm/slub.c:1807 mm/slub.c:3787 mm/slub.c:3800)
hci_conn_params_del (net/bluetooth/hci_core.c:2323)
le_scan_cleanup (net/bluetooth/hci_conn.c:202)
process_one_work (./arch/x86/include/asm/preempt.h:27 kernel/workqueue.c:2399)
worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2538)
kthread (kernel/kthread.c:376)
ret_from_fork (arch/x86/entry/entry_64.S:314)
==================================================================

Fixes: e8907f76544f ("Bluetooth: hci_sync: Make use of hci_cmd_sync_queue set 3")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>