Paolo Valente [Thu, 14 Nov 2019 09:33:11 +0000 (10:33 +0100)]
block, bfq: deschedule empty bfq_queues not referred by any process
Since commit
3726112ec731 ("block, bfq: re-schedule empty queues if
they deserve I/O plugging"), to prevent the service guarantees of a
bfq_queue from being violated, the bfq_queue may be left busy, i.e.,
scheduled for service, even if empty (see comments in
__bfq_bfqq_expire() for details). But, if no process will send
requests to the bfq_queue any longer, then there is no point in
keeping the bfq_queue scheduled for service.
In addition, keeping the bfq_queue scheduled for service, but with no
process reference any longer, may cause the bfq_queue to be freed when
descheduled from service. But this is assumed to never happen, and
causes a UAF if it happens. This, in turn, caused crashes [1, 2].
This commit fixes this issue by descheduling an empty bfq_queue when
it remains with not process reference.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1767539
[2] https://bugzilla.kernel.org/show_bug.cgi?id=205447
Fixes:
3726112ec731 ("block, bfq: re-schedule empty queues if they deserve I/O plugging")
Reported-by: Chris Evich <cevich@redhat.com>
Reported-by: Patrick Dung <patdung100@gmail.com>
Reported-by: Thorsten Schubert <tschubert@bafh.org>
Tested-by: Thorsten Schubert <tschubert@bafh.org>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Wed, 13 Nov 2019 23:12:46 +0000 (16:12 -0700)]
io_uring: ensure registered buffer import returns the IO length
A test case was reported where two linked reads with registered buffers
failed the second link always. This is because we set the expected value
of a request in req->result, and if we don't get this result, then we
fail the dependent links. For some reason the registered buffer import
returned -ERROR/0, while the normal import returns -ERROR/length. This
broke linked commands with registered buffers.
Fix this by making io_import_fixed() correctly return the mapped length.
Cc: stable@vger.kernel.org # v5.3
Reported-by: 李通洲 <carter.li@eoitek.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pavel Begunkov [Wed, 13 Nov 2019 21:59:19 +0000 (00:59 +0300)]
io_uring: Fix getting file for timeout
For timeout requests io_uring tries to grab a file with specified fd,
which is usually stdin/fd=0.
Update io_op_needs_file()
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Junichi Nomura [Tue, 12 Nov 2019 07:19:58 +0000 (07:19 +0000)]
block: check bi_size overflow before merge
__bio_try_merge_page() may merge a page to bio without bio_full() check
and cause bi_size overflow.
The overflow typically ends up with sd_init_command() warning on zero
segment request with call trace like this:
------------[ cut here ]------------
WARNING: CPU: 2 PID: 1986 at drivers/scsi/scsi_lib.c:1025 scsi_init_io+0x156/0x180
CPU: 2 PID: 1986 Comm: kworker/2:1H Kdump: loaded Not tainted 5.4.0-rc7 #1
Workqueue: kblockd blk_mq_run_work_fn
RIP: 0010:scsi_init_io+0x156/0x180
RSP: 0018:
ffffa11487663bf0 EFLAGS:
00010246
RAX:
00000000002be0a0 RBX:
ffff8e6e9ff30118 RCX:
0000000000000000
RDX:
00000000ffffffe1 RSI:
0000000000000000 RDI:
ffff8e6e9ff30118
RBP:
ffffa11487663c18 R08:
ffffa11487663d28 R09:
ffff8e6e9ff30150
R10:
0000000000000001 R11:
0000000000000000 R12:
ffff8e6e9ff30000
R13:
0000000000000001 R14:
ffff8e74a1cf1800 R15:
ffff8e6e9ff30000
FS:
0000000000000000(0000) GS:
ffff8e6ea7680000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
00007fff18cf0fe8 CR3:
0000000659f0a001 CR4:
00000000001606e0
Call Trace:
sd_init_command+0x326/0xb40 [sd_mod]
scsi_queue_rq+0x502/0xaa0
? blk_mq_get_driver_tag+0xe7/0x120
blk_mq_dispatch_rq_list+0x256/0x5a0
? elv_rb_del+0x24/0x30
? deadline_remove_request+0x7b/0xc0
blk_mq_do_dispatch_sched+0xa3/0x140
blk_mq_sched_dispatch_requests+0xfb/0x170
__blk_mq_run_hw_queue+0x81/0x130
blk_mq_run_work_fn+0x1b/0x20
process_one_work+0x179/0x390
worker_thread+0x4f/0x3e0
kthread+0x105/0x140
? max_active_store+0x80/0x80
? kthread_bind+0x20/0x20
ret_from_fork+0x35/0x40
---[ end trace
f9036abf5af4a4d3 ]---
blk_update_request: I/O error, dev sdd, sector 2875552 op 0x1:(WRITE) flags 0x0 phys_seg 0 prio class 0
XFS (sdd1): writeback error on sector 2875552
__bio_try_merge_page() should check the overflow before actually doing
merge.
Fixes:
07173c3ec276c ("block: enable multipage bvecs")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Tue, 12 Nov 2019 06:34:31 +0000 (23:34 -0700)]
io_uring: make timeout sequence == 0 mean no sequence
Currently we make sequence == 0 be the same as sequence == 1, but that's
not super useful if the intent is really to have a timeout that's just
a pure timeout.
If the user passes in sqe->off == 0, then don't apply any sequence logic
to the request, let it purely be driven by the timeout specified.
Reported-by: 李通洲 <carter.li@eoitek.com>
Reviewed-by: 李通洲 <carter.li@eoitek.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Fri, 8 Nov 2019 20:18:29 +0000 (12:18 -0800)]
cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead
cgroup writeback tries to refresh the associated wb immediately if the
current wb is dead. This is to avoid keeping issuing IOs on the stale
wb after memcg - blkcg association has changed (ie. when blkcg got
disabled / enabled higher up in the hierarchy).
Unfortunately, the logic gets triggered spuriously on inodes which are
associated with dead cgroups. When the logic is triggered on dead
cgroups, the attempt fails only after doing quite a bit of work
allocating and initializing a new wb.
While
c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping
has no dirty pages") alleviated the issue significantly as it now only
triggers when the inode has dirty pages. However, the condition can
still be triggered before the inode is switched to a different cgroup
and the logic simply doesn't make sense.
Skip the immediate switching if the associated memcg is dying.
This is a simplified version of the following two patches:
* https://lore.kernel.org/linux-mm/
20190513183053.GA73423@dennisz-mbp/
* http://lkml.kernel.org/r/
156355839560.2063.
5265687291430814589.stgit@buzz
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes:
e8a7abf5a5bd ("writeback: disassociate inodes from dying bdi_writebacks")
Acked-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Dan Carpenter [Thu, 7 Nov 2019 07:48:47 +0000 (10:48 +0300)]
block: drbd: remove a stray unlock in __drbd_send_protocol()
There are two callers of this function and they both unlock the mutex so
this ends up being a double unlock.
Fixes:
44ed167da748 ("drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Tejun Heo [Tue, 5 Nov 2019 16:09:51 +0000 (08:09 -0800)]
blkcg: make blkcg_print_stat() print stats only for online blkgs
blkcg_print_stat() iterates blkgs under RCU and doesn't test whether
the blkg is online. This can call into pd_stat_fn() on a pd which is
still being initialized leading to an oops.
The heaviest operation - recursively summing up rwstat counters - is
already done while holding the queue_lock. Expand queue_lock to cover
the other operations and skip the blkg if it isn't online yet. The
online state is protected by both blkcg and queue locks, so this
guarantees that only online blkgs are processed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Roman Gushchin <guro@fb.com>
Cc: Josef Bacik <jbacik@fb.com>
Fixes:
903d23f0a354 ("blk-cgroup: allow controllers to output their own stats")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Tue, 5 Nov 2019 22:34:10 +0000 (15:34 -0700)]
Merge branch 'nvme-5.4-rc7' of git://git.infradead.org/nvme into for-linus
Pull NVMe fixes from Keith:
"We have a few late nvme fixes for a couple device removal kernel
crashes, and a compat fix for a new ioctl introduced during this merge
window."
* 'nvme-5.4-rc7' of git://git.infradead.org/nvme:
nvme: change nvme_passthru_cmd64 to explicitly mark rsvd
nvme-multipath: fix crash in nvme_mpath_clear_ctrl_paths
nvme-rdma: fix a segmentation fault during module unload
Charles Machalow [Tue, 5 Nov 2019 06:15:10 +0000 (22:15 -0800)]
nvme: change nvme_passthru_cmd64 to explicitly mark rsvd
Changing nvme_passthru_cmd64 to add a field: rsvd2. This field is an explicit
marker for the padding space added on certain platforms as a result of the
enlargement of the result field from 32 bit to 64 bits in size, and
fixes differences in struct size when using compat ioctl for 32-bit
binaries on 64-bit architecture.
Fixes:
65e68edce0db ("nvme: allow 64-bit results in passthru commands")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Charles Machalow <csm10495@gmail.com>
[changelog]
Signed-off-by: Keith Busch <kbusch@kernel.org>
Anton Eidelman [Sat, 2 Nov 2019 00:27:55 +0000 (17:27 -0700)]
nvme-multipath: fix crash in nvme_mpath_clear_ctrl_paths
nvme_mpath_clear_ctrl_paths() iterates through
the ctrl->namespaces list while holding ctrl->scan_lock.
This does not seem to be the correct way of protecting
from concurrent list modification.
Specifically, nvme_scan_work() sorts ctrl->namespaces
AFTER unlocking scan_lock.
This may result in the following (rare) crash in ctrl disconnect
during scan_work:
BUG: kernel NULL pointer dereference, address:
0000000000000050
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 3995 Comm: nvme 5.3.5-050305-generic
RIP: 0010:nvme_mpath_clear_current_path+0xe/0x90 [nvme_core]
...
Call Trace:
nvme_mpath_clear_ctrl_paths+0x3c/0x70 [nvme_core]
nvme_remove_namespaces+0x35/0xe0 [nvme_core]
nvme_do_delete_ctrl+0x47/0x90 [nvme_core]
nvme_sysfs_delete+0x49/0x60 [nvme_core]
dev_attr_store+0x17/0x30
sysfs_kf_write+0x3e/0x50
kernfs_fop_write+0x11e/0x1a0
__vfs_write+0x1b/0x40
vfs_write+0xb9/0x1a0
ksys_write+0x67/0xe0
__x64_sys_write+0x1a/0x20
do_syscall_64+0x5a/0x130
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f8d02bfb154
Fix:
After taking scan_lock in nvme_mpath_clear_ctrl_paths()
down_read(&ctrl->namespaces_rwsem) as well to make list traversal safe.
This will not cause deadlocks because taking scan_lock never happens
while holding the namespaces_rwsem.
Moreover, scan work downs namespaces_rwsem in the same order.
Alternative: sort ctrl->namespaces in nvme_scan_work()
while still holding the scan_lock.
This would leave nvme_mpath_clear_ctrl_paths() without correct protection
against ctrl->namespaces modification by anyone other than scan_work.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Max Gurtovoy [Tue, 29 Oct 2019 14:42:27 +0000 (16:42 +0200)]
nvme-rdma: fix a segmentation fault during module unload
In case there are controllers that are not associated with any RDMA
device (e.g. during unsuccessful reconnection) and the user will unload
the module, these controllers will not be freed and will access already
freed memory. The same logic appears in other fabric drivers as well.
Fixes:
87fd125344d6 ("nvme-rdma: remove redundant reference between ib_device and tagset")
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Dan Carpenter [Thu, 31 Oct 2019 10:53:41 +0000 (13:53 +0300)]
iocost: don't nest spin_lock_irq in ioc_weight_write()
This code causes a static analysis warning:
block/blk-iocost.c:2113 ioc_weight_write() error: double lock 'irq'
We disable IRQs in blkg_conf_prep() and re-enable them in
blkg_conf_finish(). IRQ disable/enable should not be nested because
that means the IRQs will be enabled at the first unlock instead of the
second one.
Fixes:
7caa47151ab2 ("blkcg: implement blk-iocost")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Wed, 30 Oct 2019 19:53:09 +0000 (13:53 -0600)]
io_uring: ensure we clear io_kiocb->result before each issue
We use io_kiocb->result == -EAGAIN as a way to know if we need to
re-submit a polled request, as -EAGAIN reporting happens out-of-line
for IO submission failures. This field is cleared when we originally
allocate the request, but it isn't reset when we retry the submission
from async context. This can cause issues where we think something
needs a re-issue, but we're really just reading stale data.
Reset ->result whenever we re-prep a request for polled submission.
Cc: stable@vger.kernel.org
Fixes:
9e645e1105ca ("io_uring: add support for sqe links")
Reported-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Anton Ivanov [Tue, 29 Oct 2019 09:13:34 +0000 (09:13 +0000)]
um-ubd: Entrust re-queue to the upper layers
Fixes crashes due to ubd requeue logic conflicting with the block-mq
logic. Crash is reproducible in 5.0 - 5.3.
Fixes:
53766defb8c8 ("um: Clean-up command processing in UML UBD driver")
Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Anton Eidelman [Fri, 18 Oct 2019 18:32:51 +0000 (11:32 -0700)]
nvme-multipath: remove unused groups_only mode in ana log
groups_only mode in nvme_read_ana_log() is no longer used: remove it.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Anton Eidelman [Fri, 18 Oct 2019 18:32:50 +0000 (11:32 -0700)]
nvme-multipath: fix possible io hang after ctrl reconnect
The following scenario results in an IO hang:
1) ctrl completes a request with NVME_SC_ANA_TRANSITION.
NVME_NS_ANA_PENDING bit in ns->flags is set and ana_work is triggered.
2) ana_work: nvme_read_ana_log() tries to get the ANA log page from the ctrl.
This fails because ctrl disconnects.
Therefore nvme_update_ns_ana_state() is not called
and NVME_NS_ANA_PENDING bit in ns->flags is not cleared.
3) ctrl reconnects: nvme_mpath_init(ctrl,...) calls
nvme_read_ana_log(ctrl, groups_only=true).
However, nvme_update_ana_state() does not update namespaces
because nr_nsids = 0 (due to groups_only mode).
4) scan_work calls nvme_validate_ns() finds the ns and re-validates OK.
Result:
The ctrl is now live but NVME_NS_ANA_PENDING bit in ns->flags is still set.
Consequently ctrl will never be considered a viable path by __nvme_find_path().
IO will hang if ctrl is the only or the last path to the namespace.
More generally, while ctrl is reconnecting, its ANA state may change.
And because nvme_mpath_init() requests ANA log in groups_only mode,
these changes are not propagated to the existing ctrl namespaces.
This may result in a mal-function or an IO hang.
Solution:
nvme_mpath_init() will nvme_read_ana_log() with groups_only set to false.
This will not harm the new ctrl case (no namespaces present),
and will make sure the ANA state of namespaces gets updated after reconnect.
Note: Another option would be for nvme_mpath_init() to invoke
nvme_parse_ana_log(..., nvme_set_ns_ana_state) for each existing namespace.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Mon, 28 Oct 2019 15:15:33 +0000 (09:15 -0600)]
io_uring: don't touch ctx in setup after ring fd install
syzkaller reported an issue where it looks like a malicious app can
trigger a use-after-free of reading the ctx ->sq_array and ->rings
value right after having installed the ring fd in the process file
table.
Defer ring fd installation until after we're done reading those
values.
Fixes:
75b28affdd6a ("io_uring: allocate the two rings together")
Reported-by: syzbot+6f03d895a6cd0d06187f@syzkaller.appspotmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pavel Begunkov [Sun, 27 Oct 2019 19:10:36 +0000 (22:10 +0300)]
io_uring: Fix leaked shadow_req
io_queue_link_head() owns shadow_req after taking it as an argument.
By not freeing it in case of an error, it can leak the request along
with taken ctx->refs.
Reviewed-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linus Torvalds [Sun, 27 Oct 2019 17:19:19 +0000 (13:19 -0400)]
Linux 5.4-rc5
Linus Torvalds [Sun, 27 Oct 2019 11:14:40 +0000 (07:14 -0400)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"Two fixes for the VMWare guest support:
- Unbreak VMWare platform detection which got wreckaged by converting
an integer constant to a string constant.
- Fix the clang build of the VMWAre hypercall by explicitely
specifying the ouput register for INL instead of using the short
form"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/vmware: Fix platform detection VMWARE_PORT macro
x86/cpu/vmware: Use the full form of INL in VMWARE_HYPERCALL, for clang/llvm
Linus Torvalds [Sun, 27 Oct 2019 11:04:22 +0000 (07:04 -0400)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A small set of fixes for time(keeping):
- Add a missing include to prevent compiler warnings.
- Make the VDSO implementation of clock_getres() POSIX compliant
again. A recent change dropped the NULL pointer guard which is
required as NULL is a valid pointer value for this function.
- Fix two function documentation typos"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-cpu-timers: Fix two trivial comments
timers/sched_clock: Include local timekeeping.h for missing declarations
lib/vdso: Make clock_getres() POSIX compliant again
Linus Torvalds [Sun, 27 Oct 2019 10:59:34 +0000 (06:59 -0400)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A set of perf fixes:
kernel:
- Unbreak the tracking of auxiliary buffer allocations which got
imbalanced causing recource limit failures.
- Fix the fallout of splitting of ToPA entries which missed to shift
the base entry PA correctly.
- Use the correct context to lookup the AUX event when unmapping the
associated AUX buffer so the event can be stopped and the buffer
reference dropped.
tools:
- Fix buildiid-cache mode setting in copyfile_mode_ns() when copying
/proc/kcore
- Fix freeing id arrays in the event list so the correct event is
closed.
- Sync sched.h anc kvm.h headers with the kernel sources.
- Link jvmti against tools/lib/ctype.o to have weak strlcpy().
- Fix multiple memory and file descriptor leaks, found by coverity in
perf annotate.
- Fix leaks in error handling paths in 'perf c2c', 'perf kmem', found
by a static analysis tool"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/aux: Fix AUX output stopping
perf/aux: Fix tracking of auxiliary trace buffer allocation
perf/x86/intel/pt: Fix base for single entry topa
perf kmem: Fix memory leak in compact_gfp_flags()
tools headers UAPI: Sync sched.h with the kernel
tools headers kvm: Sync kvm.h headers with the kernel sources
tools headers kvm: Sync kvm headers with the kernel sources
tools headers kvm: Sync kvm headers with the kernel sources
perf c2c: Fix memory leak in build_cl_output()
perf tools: Fix mode setting in copyfile_mode_ns()
perf annotate: Fix multiple memory and file descriptor leaks
perf tools: Fix resource leak of closedir() on the error paths
perf evlist: Fix fix for freed id arrays
perf jvmti: Link against tools/lib/ctype.h to have weak strlcpy()
Linus Torvalds [Sun, 27 Oct 2019 10:55:55 +0000 (06:55 -0400)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"Two fixes for interrupt controller drivers:
- Skip IRQ_M_EXT entries in the device tree when initializing the
RISCV PLIC controller to avoid a double init attempt.
- Use the correct ITS list when issuing the VMOVP synchronization
command so the operation works only on the ITS instances which are
associated to a VM"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/sifive-plic: Skip contexts except supervisor in plic_init()
irqchip/gic-v3-its: Use the exact ITSList for VMOVP
Linus Torvalds [Sun, 27 Oct 2019 10:41:52 +0000 (06:41 -0400)]
Merge tag '5.4-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Seven cifs/smb3 fixes, including three for stable"
* tag '5.4-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs
CIFS: Fix use after free of file info structures
CIFS: Fix retry mid list corruption on reconnects
cifs: Fix missed free operations
CIFS: avoid using MID 0xFFFF
cifs: clarify comment about timestamp granularity for old servers
cifs: Handle -EINPROGRESS only when noblockcnt is set
Linus Torvalds [Sun, 27 Oct 2019 10:36:57 +0000 (06:36 -0400)]
Merge tag 'riscv/for-v5.4-rc5-b' of git://git./linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
"Several minor fixes and cleanups for v5.4-rc5:
- Three build fixes for various SPARSEMEM-related kernel
configurations
- Two cleanup patches for the kernel bug and breakpoint trap handler
code"
* tag 'riscv/for-v5.4-rc5-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: cleanup do_trap_break
riscv: cleanup <asm/bug.h>
riscv: Fix undefined reference to vmemmap_populate_basepages
riscv: Fix implicit declaration of 'page_to_section'
riscv: fix fs/proc/kcore.c compilation with sparsemem enabled
Linus Torvalds [Sat, 26 Oct 2019 23:43:12 +0000 (19:43 -0400)]
Merge tag 'mips_fixes_5.4_3' of git://git./linux/kernel/git/mips/linux
Pull MIPS fixes from Paul Burton:
"A few MIPS fixes:
- Fix VDSO time-related function behavior for systems where we need
to fall back to syscalls, but were instead returning bogus results.
- A fix to TLB exception handlers for Cavium Octeon systems where
they would inadvertently clobber the $1/$at register.
- A build fix for bcm63xx configurations.
- Switch to using my @kernel.org email address"
* tag 'mips_fixes_5.4_3' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: tlbex: Fix build_restore_pagemask KScratch restore
MIPS: bmips: mark exception vectors as char arrays
mips: vdso: Fix __arch_get_hw_counter()
MAINTAINERS: Use @kernel.org address for Paul Burton
Linus Torvalds [Sat, 26 Oct 2019 20:40:04 +0000 (16:40 -0400)]
Merge tag 'tty-5.4-rc5' of git://git./linux/kernel/git/gregkh/tty
Pull tty/serial driver fix from Greg KH:
"Here is a single tty/serial driver fix for 5.4-rc5 that resolves a
reported issue.
It has been in linux-next for a while with no problems"
* tag 'tty-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
8250-men-mcb: fix error checking when get_num_ports returns -ENODEV
Linus Torvalds [Sat, 26 Oct 2019 20:36:47 +0000 (16:36 -0400)]
Merge tag 'staging-5.4-rc5' of git://git./linux/kernel/git/gregkh/staging
Pull staging driver fix from Greg KH:
"Here is a single staging driver fix, for the wlan-ng driver, that
resolves a reported issue.
It is been in linux-next for a while with no reported issues"
* tag 'staging-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: wlan-ng: fix exit return when sme->key_idx >= NUM_WEPKEYS
Linus Torvalds [Sat, 26 Oct 2019 19:23:08 +0000 (15:23 -0400)]
Merge tag 'driver-core-5.4-rc5' of git://git./linux/kernel/git/gregkh/driver-core
Pull driver core fix from Greg KH:
"Here is a single sysfs fix for 5.4-rc5.
It resolves an error if you actually try to use the __BIN_ATTR_WO()
macro, seems I never tested it properly before :(
This has been in linux-next for a while with no reported issues"
* tag 'driver-core-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
sysfs: Fixes __BIN_ATTR_WO() macro
Linus Torvalds [Sat, 26 Oct 2019 19:17:54 +0000 (15:17 -0400)]
Merge tag 'char-misc-5.4-rc5' of git://git./linux/kernel/git/gregkh/char-misc
Pull binder fix from Greg KH:
"This is a single binder fix to resolve a reported issue by Jann. It's
been in linux-next for a while with no reported issues"
* tag 'char-misc-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
binder: Don't modify VMA bounds in ->mmap handler
Linus Torvalds [Sat, 26 Oct 2019 19:14:55 +0000 (15:14 -0400)]
Merge tag 'usb-5.4-rc5' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a number of small USB driver fixes for 5.4-rc5.
More "fun" with some of the misc USB drivers as found by syzbot, and
there are a number of other small bugfixes in here for reported
issues.
All have been in linux-next for a while with no reported issues"
* tag 'usb-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: cdns3: Error out if USB_DR_MODE_UNKNOWN in cdns3_core_init_role()
USB: ldusb: fix read info leaks
USB: serial: ti_usb_3410_5052: clean up serial data access
USB: serial: ti_usb_3410_5052: fix port-close races
USB: usblp: fix use-after-free on disconnect
usb: udc: lpc32xx: fix bad bit shift operation
usb: cdns3: Fix dequeue implementation.
USB: legousbtower: fix a signedness bug in tower_probe()
USB: legousbtower: fix memleak on disconnect
USB: ldusb: fix memleak on disconnect
Linus Torvalds [Sat, 26 Oct 2019 19:06:58 +0000 (15:06 -0400)]
Merge branch 'i2c/for-current-fixed' of git://git./linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"A few driver fixes for the I2C subsystem"
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: stm32f7: remove warning when compiling with W=1
i2c: stm32f7: fix a race in slave mode with arbitration loss irq
i2c: stm32f7: fix first byte to send in slave mode
i2c: mt65xx: fix NULL ptr dereference
i2c: aspeed: fix master pending state handling
Linus Torvalds [Sat, 26 Oct 2019 18:59:51 +0000 (14:59 -0400)]
Merge tag 'for-linus-2019-10-26' of git://git.kernel.dk/linux-block
Pull block and io_uring fixes from Jens Axboe:
"A bit bigger than usual at this point in time, mostly due to some good
bug hunting work by Pavel that resulted in three io_uring fixes from
him and two from me. Anyway, this pull request contains:
- Revert of the submit-and-wait optimization for io_uring, it can't
always be done safely. It depends on commands always making
progress on their own, which isn't necessarily the case outside of
strict file IO. (me)
- Series of two patches from me and three from Pavel, fixing issues
with shared data and sequencing for io_uring.
- Lastly, two timeout sequence fixes for io_uring (zhangyi)
- Two nbd patches fixing races (Josef)
- libahci regulator_get_optional() fix (Mark)"
* tag 'for-linus-2019-10-26' of git://git.kernel.dk/linux-block:
nbd: verify socket is supported during setup
ata: libahci_platform: Fix regulator_get_optional() misuse
nbd: handle racing with error'ed out commands
nbd: protect cmd->status with cmd->lock
io_uring: fix bad inflight accounting for SETUP_IOPOLL|SETUP_SQTHREAD
io_uring: used cached copies of sq->dropped and cq->overflow
io_uring: Fix race for sqes with userspace
io_uring: Fix broken links with offloading
io_uring: Fix corrupted user_data
io_uring: correct timeout req sequence when inserting a new entry
io_uring : correct timeout req sequence when waiting timeout
io_uring: revert "io_uring: optimize submit_and_wait API"
Linus Torvalds [Sat, 26 Oct 2019 10:35:46 +0000 (06:35 -0400)]
Merge tag 's390-5.4-5' of git://git./linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Add R_390_GLOB_DAT relocation type support. This fixes boot problem
on linux-next.
- Fix memory leak in zcrypt
* tag 's390-5.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/kaslr: add support for R_390_GLOB_DAT relocation type
s390/zcrypt: fix memleak at release
Linus Torvalds [Sat, 26 Oct 2019 10:32:12 +0000 (06:32 -0400)]
Merge tag 'for-linus-5.4-rc5-tag' of git://git./linux/kernel/git/xen/tip
Pull xen fixlet from Juergen Gross:
"Just one patch for issuing a deprecation warning for 32-bit Xen pv
guests"
* tag 'for-linus-5.4-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: issue deprecation warning for 32-bit pv guest
Linus Torvalds [Sat, 26 Oct 2019 10:29:04 +0000 (06:29 -0400)]
Merge tag 'dma-mapping-5.4-2' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fix from Christoph Hellwig:
"Fix a regression in the intel-iommu get_required_mask conversion
(Arvind Sankar)"
* tag 'dma-mapping-5.4-2' of git://git.infradead.org/users/hch/dma-mapping:
iommu/vt-d: Return the correct dma mask when we are bypassing the IOMMU
Linus Torvalds [Sat, 26 Oct 2019 10:26:04 +0000 (06:26 -0400)]
Merge tag 'dax-fix-5.4-rc5' of git://git./linux/kernel/git/nvdimm/nvdimm
Pull dax fix from Dan Williams:
"Fix a performance regression that followed from a fix to the
conversion of the fsdax implementation to the xarray. v5.3 users
report that they stop seeing huge page mappings on an application +
filesystem layout that was seeing huge pages previously on v5.2"
* tag 'dax-fix-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
fs/dax: Fix pmd vs pte conflict detection
Linus Torvalds [Sat, 26 Oct 2019 00:11:33 +0000 (20:11 -0400)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Nine changes, eight to drivers (qla2xxx, hpsa, lpfc, alua, ch,
53c710[x2], target) and one core change that tries to close a race
between sysfs delete and module removal"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: lpfc: remove left-over BUILD_NVME defines
scsi: core: try to get module before removing device
scsi: hpsa: add missing hunks in reset-patch
scsi: target: core: Do not overwrite CDB byte 1
scsi: ch: Make it possible to open a ch device multiple times again
scsi: fix kconfig dependency warning related to 53C700_LE_ON_BE
scsi: sni_53c710: fix compilation error
scsi: scsi_dh_alua: handle RTPG sense code correctly during state transitions
scsi: qla2xxx: fix a potential NULL pointer dereference
Christoph Hellwig [Thu, 17 Oct 2019 17:37:30 +0000 (19:37 +0200)]
riscv: cleanup do_trap_break
If we always compile the get_break_insn_length inline function we can
remove the ifdefs and let dead code elimination take care of the warn
branch that is now unreadable because the report_bug stub always
returns BUG_TRAP_TYPE_BUG.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Linus Torvalds [Fri, 25 Oct 2019 21:31:53 +0000 (17:31 -0400)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull input fix from Dmitry Torokhov:
"A fix for st1232 driver to properly report coordinates for 2nd and
subsequent fingers when more than one is on the surface"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: st1232 - fix reporting multitouch coordinates
Mike Christie [Thu, 17 Oct 2019 21:27:34 +0000 (16:27 -0500)]
nbd: verify socket is supported during setup
nbd requires socket families to support the shutdown method so the nbd
recv workqueue can be woken up from its sock_recvmsg call. If the socket
does not support the callout we will leave recv works running or get hangs
later when the device or module is removed.
This adds a check during socket connection/reconnection to make sure the
socket being passed in supports the needed callout.
Reported-by: syzbot+24c12fa8d218ed26011a@syzkaller.appspotmail.com
Fixes:
e9e006f5fcf2 ("nbd: fix max number of supported devs")
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Mark Brown [Wed, 16 Oct 2019 10:51:05 +0000 (11:51 +0100)]
ata: libahci_platform: Fix regulator_get_optional() misuse
This driver is using regulator_get_optional() to handle all the supplies
that it handles, and only ever enables and disables all supplies en masse
without ever doing any other configuration of the device to handle missing
power. These are clear signs that the API is being misused - it should only
be used for supplies that may be physically absent from the system and in
these cases the hardware usually needs different configuration if the
supply is missing. Instead use normal regualtor_get(), if the supply is
not described in DT then the framework will substitute a dummy regulator in
so no special handling is needed by the consumer driver.
In the case of the PHY regulator the handling in the driver is a hack to
deal with integrated PHYs; the supplies are only optional in the sense
that that there's some confusion in the code about where they're bound to.
From a code point of view they function exactly as normal supplies so can
be treated as such. It'd probably be better to model this by instantiating
a PHY object for integrated PHYs.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Josef Bacik [Mon, 21 Oct 2019 19:56:28 +0000 (15:56 -0400)]
nbd: handle racing with error'ed out commands
We hit the following warning in production
print_req_error: I/O error, dev nbd0, sector
7213934408 flags 80700
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 25 PID: 32407 at lib/refcount.c:190 refcount_sub_and_test_checked+0x53/0x60
Workqueue: knbd-recv recv_work [nbd]
RIP: 0010:refcount_sub_and_test_checked+0x53/0x60
Call Trace:
blk_mq_free_request+0xb7/0xf0
blk_mq_complete_request+0x62/0xf0
recv_work+0x29/0xa1 [nbd]
process_one_work+0x1f5/0x3f0
worker_thread+0x2d/0x3d0
? rescuer_thread+0x340/0x340
kthread+0x111/0x130
? kthread_create_on_node+0x60/0x60
ret_from_fork+0x1f/0x30
---[ end trace
b079c3c67f98bb7c ]---
This was preceded by us timing out everything and shutting down the
sockets for the device. The problem is we had a request in the queue at
the same time, so we completed the request twice. This can actually
happen in a lot of cases, we fail to get a ref on our config, we only
have one connection and just error out the command, etc.
Fix this by checking cmd->status in nbd_read_stat. We only change this
under the cmd->lock, so we are safe to check this here and see if we've
already error'ed this command out, which would indicate that we've
completed it as well.
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Josef Bacik [Mon, 21 Oct 2019 19:56:27 +0000 (15:56 -0400)]
nbd: protect cmd->status with cmd->lock
We already do this for the most part, except in timeout and clear_req.
For the timeout case we take the lock after we grab a ref on the config,
but that isn't really necessary because we're safe to touch the cmd at
this point, so just move the order around.
For the clear_req cause this is initiated by the user, so again is safe.
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linus Torvalds [Fri, 25 Oct 2019 20:11:55 +0000 (16:11 -0400)]
Merge tag 'modules-for-v5.4-rc5' of git://git./linux/kernel/git/jeyu/linux
Pull modules fixes from Jessica Yu:
- Revert __ksymtab_$namespace.$symbol naming scheme back to
__ksymtab_$symbol, as it was causing issues with depmod.
Instead, have modpost extract a symbol's namespace from __kstrtabns
and __ksymtab_strings.
- Fix `make nsdeps` for out of tree kernel builds (make O=...) caused
by unescaped '/'.
Use a different sed delimiter to avoid this problem.
* tag 'modules-for-v5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
scripts/nsdeps: use alternative sed delimiter
symbol namespaces: revert to previous __ksymtab name scheme
modpost: make updating the symbol namespace explicit
modpost: delegate updating namespaces to separate function
Linus Torvalds [Fri, 25 Oct 2019 20:00:47 +0000 (16:00 -0400)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/soc/soc
Pull ARM SoC fixes from Olof Johansson:
"A slightly larger set of fixes have accrued in the last two weeks.
Mostly a collection of the usual smaller fixes:
- Marvell Armada: USB phy setup issues on Turris Mox
- Broadcom: GPIO/pinmux DT mapping corrections for Stingray, MMC bus
width fix for RPi Zero W, GPIO LED removal for RPI CM3. Also some
maintainer updates.
- OMAP: Fixlets for display config, interrupt settings for wifi, some
clock/PM pieces. Also IOMMU regression fix and a ti-sysc
no-watchdog regression fix.
- i.MX: A few fixes around PM/settings, some devicetree fixlets and
catching up with config option changes in DRM
- Rockchip: RockRro64 misc DT fixups, Hugsun X99 USB-C, Kevin display
panel settings
... and some smaller fixes for Davinci (backlight, McBSP DMA),
Allwinner (phy regulators, PMU removal on A64, etc)"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (42 commits)
ARM: dts: stm32: relax qspi pins slew-rate for stm32mp157
MAINTAINERS: Update the Spreadtrum SoC maintainer
MAINTAINERS: Remove Gregory and Brian for ARCH_BRCMSTB
ARM: dts: bcm2837-rpi-cm3: Avoid leds-gpio probing issue
bus: ti-sysc: Fix watchdog quirk handling
ARM: OMAP2+: Add pdata for OMAP3 ISP IOMMU
ARM: OMAP2+: Plug in device_enable/idle ops for IOMMUs
ARM: davinci_all_defconfig: enable GPIO backlight
ARM: davinci: dm365: Fix McBSP dma_slave_map entry
ARM: dts: bcm2835-rpi-zero-w: Fix bus-width of sdhci
ARM: imx_v6_v7_defconfig: Enable CONFIG_DRM_MSM
arm64: dts: imx8mn: Use correct clock for usdhc's ipg clk
arm64: dts: imx8mm: Use correct clock for usdhc's ipg clk
arm64: dts: imx8mq: Use correct clock for usdhc's ipg clk
ARM: dts: imx7s: Correct GPT's ipg clock source
ARM: dts: vf610-zii-scu4-aib: Specify 'i2c-mux-idle-disconnect'
ARM: dts: imx6q-logicpd: Re-Enable SNVS power key
arm64: dts: lx2160a: Correct CPU core idle state name
mailmap: Add Simon Arlott (replacement for expired email address)
arm64: dts: rockchip: Fix override mode for rk3399-kevin panel
...
Linus Torvalds [Fri, 25 Oct 2019 19:52:05 +0000 (15:52 -0400)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Bugfixes for ARM, PPC and x86, plus selftest improvements"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: nVMX: Don't leak L1 MMIO regions to L2
KVM: SVM: Fix potential wrong physical id in avic_handle_ldr_update
kvm: clear kvmclock MSR on reset
KVM: x86: fix bugon.cocci warnings
KVM: VMX: Remove specialized handling of unexpected exit-reasons
selftests: kvm: fix sync_regs_test with newer gccs
selftests: kvm: vmx_dirty_log_test: skip the test when VMX is not supported
selftests: kvm: consolidate VMX support checks
selftests: kvm: vmx_set_nested_state_test: don't check for VMX support twice
KVM: Don't shrink/grow vCPU halt_poll_ns if host side polling is disabled
selftests: kvm: synchronize .gitignore to Makefile
kvm: x86: Expose RDPID in KVM_GET_SUPPORTED_CPUID
KVM: arm64: pmu: Reset sample period on overflow handling
KVM: arm64: pmu: Set the CHAINED attribute before creating the in-kernel event
arm64: KVM: Handle PMCR_EL0.LC as RES1 on pure AArch64 systems
KVM: arm64: pmu: Fix cycle counter truncation
KVM: PPC: Book3S HV: XIVE: Ensure VP isn't already in use
Linus Torvalds [Fri, 25 Oct 2019 19:41:14 +0000 (15:41 -0400)]
Merge tag 'drm-fixes-2019-10-25' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Quiet week this week, which I suspect means some people just didn't
get around to sending me fixes pulls in time. This has 2 komeda and a
bunch of amdgpu fixes in it:
komeda:
- typo fixes
- flushing pipes fix
amdgpu:
- Fix suspend/resume issue related to multi-media engines
- Fix memory leak in user ptr code related to hmm conversion
- Fix possible VM faults when allocating page table memory
- Fix error handling in bo list ioctl"
* tag 'drm-fixes-2019-10-25' of git://anongit.freedesktop.org/drm/drm:
drm/komeda: Fix typos in komeda_splitter_validate
drm/komeda: Don't flush inactive pipes
drm/amdgpu/vce: fix allocation size in enc ring test
drm/amdgpu: fix error handling in amdgpu_bo_list_create
drm/amdgpu: fix potential VM faults
drm/amdgpu: user pages array memory leak fix
drm/amdgpu/vcn: fix allocation size in enc ring test
drm/amdgpu/uvd7: fix allocation size in enc ring test (v2)
drm/amdgpu/uvd6: fix allocation size in enc ring test (v2)
Linus Torvalds [Fri, 25 Oct 2019 19:25:51 +0000 (15:25 -0400)]
Merge tag 'mmc-v5.4-rc4' of git://git./linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC host fixes:
- mxs: Fix flags passed to dmaengine_prep_slave_sg
- cqhci: Add a missing memory barrier
- sdhci-omap: Fix tuning procedure for temperatures < -20C"
* tag 'mmc-v5.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: mxs: fix flags passed to dmaengine_prep_slave_sg
mmc: cqhci: Commit descriptors before setting the doorbell
mmc: sdhci-omap: Fix Tuning procedure for temperatures < -20C
Jens Axboe [Fri, 25 Oct 2019 16:06:15 +0000 (10:06 -0600)]
io_uring: fix bad inflight accounting for SETUP_IOPOLL|SETUP_SQTHREAD
We currently assume that submissions from the sqthread are successful,
and if IO polling is enabled, we use that value for knowing how many
completions to look for. But if we overflowed the CQ ring or some
requests simply got errored and already completed, they won't be
available for polling.
For the case of IO polling and SQTHREAD usage, look at the pending
poll list. If it ever hits empty then we know that we don't have
anymore pollable requests inflight. For that case, simply reset
the inflight count to zero.
Reported-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Fri, 25 Oct 2019 16:04:25 +0000 (10:04 -0600)]
io_uring: used cached copies of sq->dropped and cq->overflow
We currently use the ring values directly, but that can lead to issues
if the application is malicious and changes these values on our behalf.
Created in-kernel cached versions of them, and just overwrite the user
side when we update them. This is similar to how we treat the sq/cq
ring tail/head updates.
Reported-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Patrice Chotard [Fri, 25 Oct 2019 13:01:22 +0000 (15:01 +0200)]
ARM: dts: stm32: relax qspi pins slew-rate for stm32mp157
Relax qspi pins slew-rate to minimize peak currents.
Fixes:
844030057339 ("ARM: dts: stm32: add flash nor support on stm32mp157c eval board")
Link: https://lore.kernel.org/r/20191025130122.11407-1-alexandre.torgue@st.com
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Pavel Begunkov [Fri, 25 Oct 2019 09:31:31 +0000 (12:31 +0300)]
io_uring: Fix race for sqes with userspace
io_ring_submit() finalises with
1. io_commit_sqring(), which releases sqes to the userspace
2. Then calls to io_queue_link_head(), accessing released head's sqe
Reorder them.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pavel Begunkov [Fri, 25 Oct 2019 09:31:30 +0000 (12:31 +0300)]
io_uring: Fix broken links with offloading
io_sq_thread() processes sqes by 8 without considering links. As a
result, links will be randomely subdivided.
The easiest way to fix it is to call io_get_sqring() inside
io_submit_sqes() as do io_ring_submit().
Downsides:
1. This removes optimisation of not grabbing mm_struct for fixed files
2. It submitting all sqes in one go, without finer-grained sheduling
with cq processing.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pavel Begunkov [Fri, 25 Oct 2019 09:31:29 +0000 (12:31 +0300)]
io_uring: Fix corrupted user_data
There is a bug, where failed linked requests are returned not with
specified @user_data, but with garbage from a kernel stack.
The reason is that io_fail_links() uses req->user_data, which is
uninitialised when called from io_queue_sqe() on fail path.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Juergen Gross [Fri, 25 Oct 2019 07:38:58 +0000 (09:38 +0200)]
xen: issue deprecation warning for 32-bit pv guest
Support for the kernel as Xen 32-bit PV guest will soon be removed.
Issue a warning when booted as such.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Thomas Gleixner [Fri, 25 Oct 2019 12:25:15 +0000 (14:25 +0200)]
Merge tag 'irqchip-fixes-5.4-2' of git://git./linux/kernel/git/maz/arm-platforms into irq/urgent
Pull the second lot of irqchip updates for 5.4 from Marc Zyngier:
- Sifive PLIC: force driver to skip non-relevant contexts
- GICv4: Don't send VMOVP commands to ITSs that don't have
this vPE mapped
Alan Mikhak [Thu, 24 Oct 2019 16:11:43 +0000 (09:11 -0700)]
irqchip/sifive-plic: Skip contexts except supervisor in plic_init()
Modify plic_init() to skip .dts interrupt contexts other
than supervisor external interrupt.
The .dts entry for plic may specify multiple interrupt contexts.
For example, it may assign two entries IRQ_M_EXT and IRQ_S_EXT,
in that order, to the same interrupt controller. This patch
modifies plic_init() to skip the IRQ_M_EXT context since
IRQ_S_EXT is currently the only supported context.
If IRQ_M_EXT is not skipped, plic_init() will report "handler
already present for context" when it comes across the IRQ_S_EXT
context in the next iteration of its loop.
Without this patch, .dts would have to be edited to replace the
value of IRQ_M_EXT with -1 for it to be skipped.
Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # arch/riscv
Link: https://lkml.kernel.org/r/1571933503-21504-1-git-send-email-alan.mikhak@sifive.com
Dave Airlie [Fri, 25 Oct 2019 04:48:53 +0000 (14:48 +1000)]
Merge tag 'drm-fixes-5.4-2019-10-23' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
drm-fixes-5.4-2019-10-23:
amdgpu:
- Fix suspend/resume issue related to multi-media engines
- Fix memory leak in user ptr code related to hmm conversion
- Fix possible VM faults when allocating page table memory
- Fix error handling in bo list ioctl
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024031809.3155-1-alexander.deucher@amd.com
Dave Airlie [Fri, 25 Oct 2019 04:45:12 +0000 (14:45 +1000)]
Merge tag 'drm-misc-fixes-2019-10-23' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Two fixes for komeda, one for typos and one to prevent an hardware issue
when flushing inactive pipes
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191023112643.evpp6f23mpjwdsn4@gilmour
Dave Wysochanski [Wed, 23 Oct 2019 09:02:33 +0000 (05:02 -0400)]
cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs
There's a deadlock that is possible and can easily be seen with
a test where multiple readers open/read/close of the same file
and a disruption occurs causing reconnect. The deadlock is due
a reader thread inside cifs_strict_readv calling down_read and
obtaining lock_sem, and then after reconnect inside
cifs_reopen_file calling down_read a second time. If in
between the two down_read calls, a down_write comes from
another process, deadlock occurs.
CPU0 CPU1
---- ----
cifs_strict_readv()
down_read(&cifsi->lock_sem);
_cifsFileInfo_put
OR
cifs_new_fileinfo
down_write(&cifsi->lock_sem);
cifs_reopen_file()
down_read(&cifsi->lock_sem);
Fix the above by changing all down_write(lock_sem) calls to
down_write_trylock(lock_sem)/msleep() loop, which in turn
makes the second down_read call benign since it will never
block behind the writer while holding lock_sem.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Suggested-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed--by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Pavel Shilovsky [Wed, 23 Oct 2019 22:37:19 +0000 (15:37 -0700)]
CIFS: Fix use after free of file info structures
Currently the code assumes that if a file info entry belongs
to lists of open file handles of an inode and a tcon then
it has non-zero reference. The recent changes broke that
assumption when putting the last reference of the file info.
There may be a situation when a file is being deleted but
nothing prevents another thread to reference it again
and start using it. This happens because we do not hold
the inode list lock while checking the number of references
of the file info structure. Fix this by doing the proper
locking when doing the check.
Fixes:
487317c99477d ("cifs: add spinlock for the openFileList to cifsInodeInfo")
Fixes:
cb248819d209d ("cifs: use cifsInodeInfo->open_file_lock while iterating to avoid a panic")
Cc: Stable <stable@vger.kernel.org>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pavel Shilovsky [Tue, 22 Oct 2019 15:41:42 +0000 (08:41 -0700)]
CIFS: Fix retry mid list corruption on reconnects
When the client hits reconnect it iterates over the mid
pending queue marking entries for retry and moving them
to a temporary list to issue callbacks later without holding
GlobalMid_Lock. In the same time there is no guarantee that
mids can't be removed from the temporary list or even
freed completely by another thread. It may cause a temporary
list corruption:
[ 430.454897] list_del corruption. prev->next should be
ffff98d3a8f316c0, but was
2e885cb266355469
[ 430.464668] ------------[ cut here ]------------
[ 430.466569] kernel BUG at lib/list_debug.c:51!
[ 430.468476] invalid opcode: 0000 [#1] SMP PTI
[ 430.470286] CPU: 0 PID: 13267 Comm: cifsd Kdump: loaded Not tainted 5.4.0-rc3+ #19
[ 430.473472] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
[ 430.475872] RIP: 0010:__list_del_entry_valid.cold+0x31/0x55
...
[ 430.510426] Call Trace:
[ 430.511500] cifs_reconnect+0x25e/0x610 [cifs]
[ 430.513350] cifs_readv_from_socket+0x220/0x250 [cifs]
[ 430.515464] cifs_read_from_socket+0x4a/0x70 [cifs]
[ 430.517452] ? try_to_wake_up+0x212/0x650
[ 430.519122] ? cifs_small_buf_get+0x16/0x30 [cifs]
[ 430.521086] ? allocate_buffers+0x66/0x120 [cifs]
[ 430.523019] cifs_demultiplex_thread+0xdc/0xc30 [cifs]
[ 430.525116] kthread+0xfb/0x130
[ 430.526421] ? cifs_handle_standard+0x190/0x190 [cifs]
[ 430.528514] ? kthread_park+0x90/0x90
[ 430.530019] ret_from_fork+0x35/0x40
Fix this by obtaining extra references for mids being retried
and marking them as MID_DELETED which indicates that such a mid
has been dequeued from the pending list.
Also move mid cleanup logic from DeleteMidQEntry to
_cifs_mid_q_entry_release which is called when the last reference
to a particular mid is put. This allows to avoid any use-after-free
of response buffers.
The patch needs to be backported to stable kernels. A stable tag
is not mentioned below because the patch doesn't apply cleanly
to any actively maintained stable kernel.
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-and-tested-by: David Wysochanski <dwysocha@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Linus Torvalds [Thu, 24 Oct 2019 22:29:40 +0000 (18:29 -0400)]
Merge tag 'devicetree-fixes-for-5.4-2' of git://git./linux/kernel/git/robh/linux
Pull Devicetree fixes from Rob Herring:
"A couple more DT fixes for 5.4: fix a ref count, memory leak, and
Risc-V cpu schema warnings"
* tag 'devicetree-fixes-for-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: reserved_mem: add missing of_node_put() for proper ref-counting
of: unittest: fix memory leak in unittest_data_add
dt-bindings: riscv: Fix CPU schema errors
Linus Torvalds [Thu, 24 Oct 2019 19:49:32 +0000 (15:49 -0400)]
Merge tag 'acpi-5.4-rc5' of git://git./linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Fix locking issue in the error code path of a function that belongs to
the sysfs interface exposed by the ACPI NFIT handling code (Dan
Carpenter)"
* tag 'acpi-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: NFIT: Fix unlock on error in scrub_show()
Linus Torvalds [Thu, 24 Oct 2019 19:36:11 +0000 (15:36 -0400)]
Merge tag 'pm-5.4-rc5' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix problems related to frequency limits management in cpufreq
that were introduced during the 5.3 cycle (when PM QoS had started to
be used for that), fix a few issues in the OPP (operating performance
points) library code and fix up the recently added haltpoll cpuidle
driver.
The cpufreq changes are somewhat bigger that I would like them to be
at this stage of the cycle, but the problems fixed by them include
crashes on boot and shutdown in some cases (among other things) and in
my view it is better to address the root of the issue right away.
Specifics:
- Using device PM QoS of CPU devices for managing frequency limits in
cpufreq does not work, so introduce frequency QoS (based on the
original low-level PM QoS) for this purpose, switch cpufreq and
related code over to using it and fix a race involving deferred
updates of frequency limits on top of that (Rafael Wysocki, Sudeep
Holla).
- Avoid calling regulator_enable()/disable() from the OPP framework
to avoid side-effects on boot-enabled regulators that may change
their initial voltage due to performing initial voltage balancing
without all restrictions from the consumers (Marek Szyprowski).
- Avoid a kref management issue in the OPP library code and drop an
incorrectly added lockdep_assert_held() from it (Viresh Kumar).
- Make the recently added haltpoll cpuidle driver take the 'idle='
override into account as appropriate (Zhenzhong Duan)"
* tag 'pm-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
opp: Reinitialize the list_kref before adding the static OPPs again
cpufreq: Cancel policy update work scheduled before freeing
cpuidle: haltpoll: Take 'idle=' override into account
opp: core: Revert "add regulators enable and disable"
PM: QoS: Drop frequency QoS types from device PM QoS
cpufreq: Use per-policy frequency QoS
PM: QoS: Introduce frequency QoS
opp: of: drop incorrect lockdep_assert_held()
Linus Torvalds [Thu, 24 Oct 2019 19:31:55 +0000 (15:31 -0400)]
Merge tag 'gfs2-v5.4-rc4.fixes' of git://git./linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 fix from Andreas Gruenbacher:
"Fix a memory leak introduced in -rc1"
* tag 'gfs2-v5.4-rc4.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: Fix memory leak when gfs2meta's fs_context is freed
Alain Volmat [Tue, 15 Oct 2019 13:11:58 +0000 (15:11 +0200)]
i2c: stm32f7: remove warning when compiling with W=1
Remove the following warning:
drivers/i2c/busses/i2c-stm32f7.c:315:
warning: cannot understand function prototype:
'struct stm32f7_i2c_spec i2c_specs[] =
Replace a comment starting with /** by simply /* to avoid having
it interpreted as a kernel-doc comment.
Fixes:
aeb068c57214 ("i2c: i2c-stm32f7: add driver")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fabrice Gasnier [Tue, 1 Oct 2019 08:51:09 +0000 (10:51 +0200)]
i2c: stm32f7: fix a race in slave mode with arbitration loss irq
When in slave mode, an arbitration loss (ARLO) may be detected before the
slave had a chance to detect the stop condition (STOPF in ISR).
This is seen when two master + slave adapters switch their roles. It
provokes the i2c bus to be stuck, busy as SCL line is stretched.
- the I2C_SLAVE_STOP event is never generated due to STOPF flag is set but
don't generate an irq (race with ARLO irq, STOPIE is masked). STOPF flag
remains set until next master xfer (e.g. when STOPIE irq get unmasked).
In this case, completion is generated too early: immediately upon new
transfer request (then it doesn't send all data).
- Some data get stuck in TXDR register. As a consequence, the controller
stretches the SCL line: the bus gets busy until a future master transfer
triggers the bus busy / recovery mechanism (this can take time... and
may never happen at all)
So choice is to let the STOPF being detected by the slave isr handler,
to properly handle this stop condition. E.g. don't mask IRQs in error
handler, when the slave is running.
Fixes:
60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fabrice Gasnier [Mon, 30 Sep 2019 15:28:01 +0000 (17:28 +0200)]
i2c: stm32f7: fix first byte to send in slave mode
The slave-interface documentation [1] states "the bus driver should
transmit the first byte" upon I2C_SLAVE_READ_REQUESTED slave event:
- 'val': backend returns first byte to be sent
The driver currently ignores the 1st byte to send on this event.
[1] https://www.kernel.org/doc/Documentation/i2c/slave-interface
Fixes:
60d609f30de2 ("i2c: i2c-stm32f7: Add slave support")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fabien Parent [Fri, 18 Oct 2019 17:32:13 +0000 (19:32 +0200)]
i2c: mt65xx: fix NULL ptr dereference
Since commit
abf4923e97c3 ("i2c: mediatek: disable zero-length transfers
for mt8183"), there is a NULL pointer dereference for all the SoCs
that don't have any quirk. mtk_i2c_functionality is not checking that
the quirks pointer is not NULL before starting to use it.
This commit add a call to i2c_check_quirks which will check whether
the quirks pointer is set, and if so will check if the IP has the
NO_ZERO_LEN quirk.
Fixes:
abf4923e97c3 ("i2c: mediatek: disable zero-length transfers for mt8183")
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Cengiz Can <cengiz@kernel.wtf>
Reviewed-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Ulrich Hecht <uli@fpond.eu>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Zenghui Yu [Wed, 23 Oct 2019 03:46:26 +0000 (03:46 +0000)]
irqchip/gic-v3-its: Use the exact ITSList for VMOVP
On a system without Single VMOVP support (say GITS_TYPER.VMOVP == 0),
we will map vPEs only on ITSs that will actually control interrupts
for the given VM. And when moving a vPE, the VMOVP command will be
issued only for those ITSs.
But when issuing VMOVPs we seemed fail to present the exact ITSList
to ITSs who are actually included in the synchronization operation.
The its_list_map we're currently using includes all ITSs in the system,
even though some of them don't have the corresponding vPE mapping at all.
Introduce get_its_list() to get the per-VM its_list_map, to indicate
which ITSs have vPE mappings for the given VM, and use this map as
the expected ITSList when building VMOVP. This is hopefully a performance
gain not to do some synchronization with those unsuspecting ITSs.
And initialize the whole command descriptor to zero at beginning, since
the seq_num and its_list should be RES0 when GITS_TYPER.VMOVP == 1.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1571802386-2680-1-git-send-email-yuzenghui@huawei.com
Andrew Price [Fri, 4 Oct 2019 16:51:58 +0000 (11:51 -0500)]
gfs2: Fix memory leak when gfs2meta's fs_context is freed
gfs2 and gfs2meta share an ->init_fs_context function which allocates an
args structure stored in fc->fs_private. gfs2 registers a ->free
function to free this memory when the fs_context is cleaned up, but
there was not one registered for gfs2meta, causing a leak.
Register a ->free function for gfs2meta. The existing gfs2_fc_free
function does what we need.
Reported-by: syzbot+c2fdfd2b783754878fb6@syzkaller.appspotmail.com
Fixes:
1f52aa08d12f ("gfs2: Convert gfs2 to fs_context")
Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Rafael J. Wysocki [Thu, 24 Oct 2019 14:00:43 +0000 (16:00 +0200)]
Merge branches 'pm-cpuidle' and 'pm-opp'
* pm-cpuidle:
cpuidle: haltpoll: Take 'idle=' override into account
* pm-opp:
opp: Reinitialize the list_kref before adding the static OPPs again
opp: core: Revert "add regulators enable and disable"
opp: of: drop incorrect lockdep_assert_held()
Linus Torvalds [Thu, 24 Oct 2019 10:13:45 +0000 (06:13 -0400)]
Merge tag 'mfd-fixes-5.4' of git://git./linux/kernel/git/lee/mfd
Pull MFD fix from Lee Jones:
"Fix broken support for BananaPi-r2"
* tag 'mfd-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
mfd: mt6397: Fix probe after changing mt6397-core
Linus Torvalds [Thu, 24 Oct 2019 10:09:42 +0000 (06:09 -0400)]
Merge tag 'sound-5.4-rc5' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This is a usual small bump in the middle, we've got a set of ASoC
fixes in this week as shown in diffstat.
The only change in the core stuff is about (somewhat minor) PCM
debugfs error handling. The major changes are rather for Intel SOF and
topology coverage, as well as other platform (rockchip, samsung, stm)
and codec fixes.
As non-ASoC changes, a couple of new HD-audio chip fixes and a typo
correction of USB-audio driver validation code are found"
* tag 'sound-5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (29 commits)
ALSA: hda: Add Tigerlake/Jasperlake PCI ID
ALSA: usb-audio: Fix copy&paste error in the validator
ALSA: hda/realtek - Add support for ALC711
ASoC: SOF: control: return true when kcontrol values change
ASoC: stm32: sai: fix sysclk management on shutdown
ASoC: Intel: sof-rt5682: add a check for devm_clk_get
ASoC: rsnd: Reinitialize bit clock inversion flag for every format setting
ASoC: simple_card_utils.h: Fix potential multiple redefinition error
ASoC: msm8916-wcd-digital: add missing MIX2 path for RX1/2
ASoC: core: Fix pcm code debugfs error
ASoc: rockchip: i2s: Fix RPM imbalance
ASoC: wm_adsp: Don't generate kcontrols without READ flags
ASoC: intel: bytcr_rt5651: add null check to support_button_press
ASoC: intel: sof_rt5682: add remove function to disable jack
ASoC: rt5682: add NULL handler to set_jack function
ASoC: intel: sof_rt5682: use separate route map for dmic
ASoC: SOF: Intel: hda: Disable DMI L1 entry during capture
ASoC: SOF: Intel: initialise and verify FW crash dump data.
ASoC: SOF: Intel: hda: fix warnings during FW load
ASoC: SOF: pcm: harden PCM STOP sequence
...
Frank Wunderlich [Thu, 3 Oct 2019 18:53:23 +0000 (20:53 +0200)]
mfd: mt6397: Fix probe after changing mt6397-core
Part 3 from this series [1] was not merged due to wrong splitting
and breaks mt6323 pmic on bananapi-r2
dmesg prints this line and at least switch is not initialized on bananapi-r2
mt6397
1000d000.pwrap:mt6323: unsupported chip: 0x0
this patch contains only the probe-changes and chip_data structs
from original part 3 by Hsin-Hsiung Wang
[1] https://patchwork.kernel.org/project/linux-mediatek/list/?series=164155
Fixes:
a4872e80ce7d ("mfd: mt6397: Extract IRQ related code from core driver")
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Paul Burton [Fri, 18 Oct 2019 22:38:48 +0000 (15:38 -0700)]
MIPS: tlbex: Fix build_restore_pagemask KScratch restore
build_restore_pagemask() will restore the value of register $1/$at when
its restore_scratch argument is non-zero, and aims to do so by filling a
branch delay slot. Commit
0b24cae4d535 ("MIPS: Add missing EHB in mtc0
-> mfc0 sequence.") added an EHB instruction (Execution Hazard Barrier)
prior to restoring $1 from a KScratch register, in order to resolve a
hazard that can result in stale values of the KScratch register being
observed. In particular, P-class CPUs from MIPS with out of order
execution pipelines such as the P5600 & P6600 are affected.
Unfortunately this EHB instruction was inserted in the branch delay slot
causing the MFC0 instruction which performs the restoration to no longer
execute along with the branch. The result is that the $1 register isn't
actually restored, ie. the TLB refill exception handler clobbers it -
which is exactly the problem the EHB is meant to avoid for the P-class
CPUs.
Similarly build_get_pgd_vmalloc() will restore the value of $1/$at when
its mode argument equals refill_scratch, and suffers from the same
problem.
Fix this by in both cases moving the EHB earlier in the emitted code.
There's no reason it needs to immediately precede the MFC0 - it simply
needs to be between the MTC0 & MFC0.
This bug only affects Cavium Octeon systems which use
build_fast_tlb_refill_handler().
Signed-off-by: Paul Burton <paulburton@kernel.org>
Fixes:
0b24cae4d535 ("MIPS: Add missing EHB in mtc0 -> mfc0 sequence.")
Cc: Dmitry Korotin <dkorotin@wavecomp.com>
Cc: stable@vger.kernel.org # v3.15+
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
zhangyi (F) [Wed, 23 Oct 2019 07:10:09 +0000 (15:10 +0800)]
io_uring: correct timeout req sequence when inserting a new entry
The sequence number of the timeout req (req->sequence) indicate the
expected completion request. Because of each timeout req consume a
sequence number, so the sequence of each timeout req on the timeout
list shouldn't be the same. But now, we may get the same number (also
incorrect) if we insert a new entry before the last one, such as submit
such two timeout reqs on a new ring instance below.
req->sequence
req_1 (count = 2): 2
req_2 (count = 1): 2
Then, if we submit a nop req, req_2 will still timeout even the nop req
finished. This patch fix this problem by adjust the sequence number of
each reordered reqs when inserting a new entry.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
zhangyi (F) [Wed, 23 Oct 2019 07:10:08 +0000 (15:10 +0800)]
io_uring : correct timeout req sequence when waiting timeout
The sequence number of reqs on the timeout_list before the timeout req
should be adjusted in io_timeout_fn(), because the current timeout req
will consumes a slot in the cq_ring and cq_tail pointer will be
increased, otherwise other timeout reqs may return in advance without
waiting for enough wait_nr.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jens Axboe [Tue, 22 Oct 2019 19:14:37 +0000 (13:14 -0600)]
io_uring: revert "io_uring: optimize submit_and_wait API"
There are cases where it isn't always safe to block for submission,
even if the caller asked to wait for events as well. Revert the
previous optimization of doing that.
This reverts two commits:
bf7ec93c644cb
c576666863b78
Fixes:
c576666863b78 ("io_uring: optimize submit_and_wait API")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Jonas Gorski [Tue, 22 Oct 2019 19:11:00 +0000 (21:11 +0200)]
MIPS: bmips: mark exception vectors as char arrays
The vectors span more than one byte, so mark them as arrays.
Fixes the following build error when building when using GCC 8.3:
In file included from ./include/linux/string.h:19,
from ./include/linux/bitmap.h:9,
from ./include/linux/cpumask.h:12,
from ./arch/mips/include/asm/processor.h:15,
from ./arch/mips/include/asm/thread_info.h:16,
from ./include/linux/thread_info.h:38,
from ./include/asm-generic/preempt.h:5,
from ./arch/mips/include/generated/asm/preempt.h:1,
from ./include/linux/preempt.h:81,
from ./include/linux/spinlock.h:51,
from ./include/linux/mmzone.h:8,
from ./include/linux/bootmem.h:8,
from arch/mips/bcm63xx/prom.c:10:
arch/mips/bcm63xx/prom.c: In function 'prom_init':
./arch/mips/include/asm/string.h:162:11: error: '__builtin_memcpy' forming offset [2, 32] is out of the bounds [0, 1] of object 'bmips_smp_movevec' with type 'char' [-Werror=array-bounds]
__ret = __builtin_memcpy((dst), (src), __len); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/mips/bcm63xx/prom.c:97:3: note: in expansion of macro 'memcpy'
memcpy((void *)0xa0000200, &bmips_smp_movevec, 0x20);
^~~~~~
In file included from arch/mips/bcm63xx/prom.c:14:
./arch/mips/include/asm/bmips.h:80:13: note: 'bmips_smp_movevec' declared here
extern char bmips_smp_movevec;
Fixes:
18a1eef92dcd ("MIPS: BMIPS: Introduce bmips.h")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Olof Johansson [Thu, 24 Oct 2019 03:01:24 +0000 (20:01 -0700)]
Merge tag 'arm-soc/for-5.5/maintainers' of https://github.com/Broadcom/stblinux into arm/fixes
This pull request contains MAINTAINERS file updates for Broadcom SoCs
for the 5.5 kernel, please pull the following:
- Simon adds a .mailmap alias for his old email
- Stefan updates the existing BCM2835 with BCM2711 which is the chip
name for the Raspberry Pi 4
- Florian removes Gregory and Brian from the MAINTAINERS file for
BRCMSTB SoCs
* tag 'arm-soc/for-5.5/maintainers' of https://github.com/Broadcom/stblinux:
MAINTAINERS: Remove Gregory and Brian for ARCH_BRCMSTB
mailmap: Add Simon Arlott (replacement for expired email address)
MAINTAINERS: Add BCM2711 to BCM2835 ARCH
Link: https://lore.kernel.org/r/20191023212814.30622-3-f.fainelli@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Baolin Wang [Thu, 24 Oct 2019 02:05:10 +0000 (10:05 +0800)]
MAINTAINERS: Update the Spreadtrum SoC maintainer
Change my email address, and add more Spreadtrum SC27xx series PMIC
drivers to maintain.
Link: https://lore.kernel.org/r/a48483d13243450ecf3b777d49e741b6367f2c6b.1571881956.git.baolin.wang@linaro.org
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Christoph Hellwig [Thu, 17 Oct 2019 17:37:29 +0000 (19:37 +0200)]
riscv: cleanup <asm/bug.h>
Remove various not required ifdefs and externs.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Kefeng Wang [Wed, 23 Oct 2019 03:23:02 +0000 (11:23 +0800)]
riscv: Fix undefined reference to vmemmap_populate_basepages
Using CONFIG_SPARSEMEM_VMEMMAP instead of CONFIG_SPARSEMEM to fix
following build issue.
riscv64-linux-ld: arch/riscv/mm/init.o: in function 'vmemmap_populate':
init.c:(.meminit.text+0x8): undefined reference to 'vmemmap_populate_basepages'
Cc: Logan Gunthorpe <logang@deltatee.com>
Fixes:
d95f1a542c3d ("RISC-V: Implement sparsemem")
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Kefeng Wang [Wed, 23 Oct 2019 03:23:01 +0000 (11:23 +0800)]
riscv: Fix implicit declaration of 'page_to_section'
With CONFIG_SPARSEMEM and !CONFIG_SPARSEMEM_VMEMMAP,
arch/riscv/include/asm/pgtable.h: In function ‘mk_pte’:
include/asm-generic/memory_model.h:64:14: error: implicit declaration of function ‘page_to_section’; did you mean ‘present_section’? [-Werror=implicit-function-declaration]
int __sec = page_to_section(__pg); \
^~~~~~~~~~~~~~~
Fixed by changing mk_pte() from inline function to macro.
Cc: Logan Gunthorpe <logang@deltatee.com>
Fixes:
d95f1a542c3d ("RISC-V: Implement sparsemem")
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
[paul.walmsley@sifive.com: fixed checkpatch errors]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
David Abdurachmanov [Tue, 22 Oct 2019 16:21:35 +0000 (19:21 +0300)]
riscv: fix fs/proc/kcore.c compilation with sparsemem enabled
Failed to compile Fedora/RISCV kernel (5.4-rc3+) with sparsemem enabled:
fs/proc/kcore.c: In function 'read_kcore':
fs/proc/kcore.c:510:8: error: implicit declaration of function 'kern_addr_valid'; did you mean 'virt_addr_valid'? [-Werror=implicit-function-declaration]
510 | if (kern_addr_valid(start)) {
| ^~~~~~~~~~~~~~~
| virt_addr_valid
Looking at other architectures I don't see kern_addr_valid being guarded by
CONFIG_FLATMEM.
Fixes:
d95f1a542c3d ("RISC-V: Implement sparsemem")
Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
Tested-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Chris Goldsworthy [Sun, 20 Oct 2019 01:57:24 +0000 (18:57 -0700)]
of: reserved_mem: add missing of_node_put() for proper ref-counting
Commit
d698a388146c ("of: reserved-memory: ignore disabled memory-region
nodes") added an early return in of_reserved_mem_device_init_by_idx(), but
didn't call of_node_put() on a device_node whose ref-count was incremented
in the call to of_parse_phandle() preceding the early exit.
Fixes:
d698a388146c ("of: reserved-memory: ignore disabled memory-region nodes")
Signed-off-by: Chris Goldsworthy <cgoldswo@codeaurora.org>
Cc: stable@vger.kernel.org
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Linus Torvalds [Wed, 23 Oct 2019 19:43:51 +0000 (15:43 -0400)]
Merge tag 'trace-v5.4-rc3-3' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Two minor fixes:
- A race in perf trace initialization (missing mutexes)
- Minor fix to represent gfp_t in synthetic events as properly
signed"
* tag 'trace-v5.4-rc3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix race in perf_trace_buf initialization
tracing: Fix "gfp_t" format for synthetic events
Navid Emamdoost [Fri, 4 Oct 2019 18:58:43 +0000 (13:58 -0500)]
of: unittest: fix memory leak in unittest_data_add
In unittest_data_add, a copy buffer is created via kmemdup. This buffer
is leaked if of_fdt_unflatten_tree fails. The release for the
unittest_data buffer is added.
Fixes:
b951f9dc7f25 ("Enabling OF selftest to run without machine's devicetree")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Rob Herring [Tue, 24 Sep 2019 19:37:56 +0000 (14:37 -0500)]
dt-bindings: riscv: Fix CPU schema errors
Fix the errors in the RiscV CPU DT schema:
Documentation/devicetree/bindings/riscv/cpus.example.dt.yaml: cpu@0: 'timebase-frequency' is a required property
Documentation/devicetree/bindings/riscv/cpus.example.dt.yaml: cpu@1: 'timebase-frequency' is a required property
Documentation/devicetree/bindings/riscv/cpus.example.dt.yaml: cpu@0: compatible:0: 'riscv' is not one of ['sifive,rocket0', 'sifive,e5', 'sifive,e51', 'sifive,u54-mc', 'sifive,u54', 'sifive,u5']
Documentation/devicetree/bindings/riscv/cpus.example.dt.yaml: cpu@0: compatible: ['riscv'] is too short
Documentation/devicetree/bindings/riscv/cpus.example.dt.yaml: cpu@0: 'timebase-frequency' is a required property
The DT spec allows for 'timebase-frequency' to be in 'cpu' or 'cpus' node
and RiscV requires it in /cpus node, so make it disallowed in cpu
nodes.
Fixes:
4fd669a8c487 ("dt-bindings: riscv: convert cpu binding to json-schema")
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org
Acked-by: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Linus Torvalds [Wed, 23 Oct 2019 19:39:02 +0000 (15:39 -0400)]
Merge tag 'vfio-v5.4-rc5' of git://github.com/awilliam/linux-vfio
Pull VFIO fixlet from Alex Williamson:
"Fix (false) uninitialized variable warning (Joerg Roedel)"
* tag 'vfio-v5.4-rc5' of git://github.com/awilliam/linux-vfio:
vfio/type1: Initialize resv_msi_base
Linus Torvalds [Wed, 23 Oct 2019 19:31:17 +0000 (15:31 -0400)]
Merge tag 'regulator-fix-v5.4-rc4' of git://git./linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"There are a few core fixes here around error handling and handling if
suspend mode configuration and some driver specific fixes here but the
most important change is the fix to the fixed-regulator DT schema
conversion introduced during the last merge window.
That fixes one of the last two errors preventing successful execution
of "make dt_binding_check" which will be enormously helpful for DT
schema development"
* tag 'regulator-fix-v5.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: qcom-rpmh: Fix PMIC5 BoB min voltage
regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized
regulator: lochnagar: Add on_off_delay for VDDCORE
regulator: ti-abb: Fix timeout in ti_abb_wait_txdone/ti_abb_clear_all_txdone
regulator: da9062: fix suspend_enable/disable preparation
dt-bindings: fixed-regulator: fix compatible enum
regulator: fixed: Prevent NULL pointer dereference when !CONFIG_OF
regulator: core: make regulator_register() EPROBE_DEFER aware
regulator: of: fix suspend-min/max-voltage parsing
Florian Fainelli [Fri, 18 Oct 2019 17:18:35 +0000 (10:18 -0700)]
MAINTAINERS: Remove Gregory and Brian for ARCH_BRCMSTB
The last time Gregory and Brian did a review was sometime around 2015,
since then, they have not been active for ARCH_BRCMSTB changes.
Following the position of other maintainers and Harald Welte's position
here:
[1] http://laforge.gnumonks.org/blog/
20180307-mchardy-gpl/
remove both of them.
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Olof Johansson [Wed, 23 Oct 2019 17:08:11 +0000 (10:08 -0700)]
Merge tag 'omap-for-v5.4/fixes-rc4-signed' of git://git./linux/kernel/git/tmlind/linux-omap into arm/fixes
Three fixes for omaps for v5.4-rc cycle
Two regression fixes for omap3 iommu. I missed applying two omap3
related iommu pdata quirks patches earlier because the kbuild test
robot produced errors on them for missing dependencies.
Fix ti-sysc interconnect target module driver handling for watchdog
quirk. I must have tested this earlier only with watchdog service
running, but clearly it does not do what it needs to do.
* tag 'omap-for-v5.4/fixes-rc4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
bus: ti-sysc: Fix watchdog quirk handling
ARM: OMAP2+: Add pdata for OMAP3 ISP IOMMU
ARM: OMAP2+: Plug in device_enable/idle ops for IOMMUs
Link: https://lore.kernel.org/r/pull-1571848757-282222@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Olof Johansson [Wed, 23 Oct 2019 15:34:08 +0000 (08:34 -0700)]
Merge tag 'sunxi-fixes-for-5.4-1' of https://git./linux/kernel/git/sunxi/linux into arm/fixes
A number of fixes for this release, but mostly:
- A fixup for the A10 CSI DT binding merged during the 5.4-rc1 window
- A fix for a dt-binding error
- Addition of phy regulator delays
- The PMU on the A64 was found to be non-functional, so we've dropped it for now
* tag 'sunxi-fixes-for-5.4-1' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
ARM: dts: sun7i: Drop the module clock from the device tree
dt-bindings: media: sun4i-csi: Drop the module clock
media: dt-bindings: Fix building error for dt_binding_check
arm64: dts: allwinner: a64: sopine-baseboard: Add PHY regulator delay
arm64: dts: allwinner: a64: Drop PMU node
arm64: dts: allwinner: a64: pine64-plus: Add PHY regulator delay
Link: https://lore.kernel.org/r/80085a57-c40f-4bed-a9c3-19858d87564e.lettre@localhost
Signed-off-by: Olof Johansson <olof@lixom.net>
Yi Wang [Mon, 21 Oct 2019 07:44:12 +0000 (15:44 +0800)]
posix-cpu-timers: Fix two trivial comments
Recent changes modified the function arguments of
thread_group_sample_cputime() and task_cputimers_expired(), but forgot to
update the comments. Fix it up.
[ tglx: Changed the argument name of task_cputimers_expired() as the pointer
points to an array of samples. ]
Fixes:
b7be4ef1365d ("posix-cpu-timers: Switch thread group sampling to array")
Fixes:
001f7971433a ("posix-cpu-timers: Make expiry checks array based")
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1571643852-21848-1-git-send-email-wang.yi59@zte.com.cn
Ben Dooks (Codethink) [Tue, 22 Oct 2019 13:12:26 +0000 (14:12 +0100)]
timers/sched_clock: Include local timekeeping.h for missing declarations
Include the timekeeping.h header to get the declaration of the
sched_clock_{suspend,resume} functions. Fixes the following sparse
warnings:
kernel/time/sched_clock.c:275:5: warning: symbol 'sched_clock_suspend' was not declared. Should it be static?
kernel/time/sched_clock.c:286:6: warning: symbol 'sched_clock_resume' was not declared. Should it be static?
Signed-off-by: Ben Dooks (Codethink) <ben.dooks@codethink.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191022131226.11465-1-ben.dooks@codethink.co.uk