review.tizen.org Git - platform/kernel/linux-starfive.git/log

Merge tag 'x86_mm_for_v6.0_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 mm updates from Borislav Petkov:

- Rename a PKRU macro to make more sense when reading the code

- Update pkeys documentation

- Avoid reading contended mm's TLB generation var if not absolutely
   necessary along with fixing a case where arch_tlbbatch_flush()
   doesn't adhere to the generation scheme and thus violates the
   conditions for the above avoidance.

* tag 'x86_mm_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/tlb: Ignore f->new_tlb_gen when zero
  x86/pkeys: Clarify PKRU_AD_KEY macro
  Documentation/protection-keys: Clean up documentation for User Space pkeys
  x86/mm/tlb: Avoid reading mm_tlb_gen when possible

Merge tag 'x86_cleanups_for_v6.0_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 cleanup from Borislav Petkov:

- A single CONFIG_ symbol correction in a comment

* tag 'x86_cleanups_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Refer to the intended config STRICT_DEVMEM in a comment

Merge tag 'x86_vmware_for_v6.0_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 vmware cleanup from Borislav Petkov:

- A single statement simplification by using the BIT() macro

* tag 'x86_vmware_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/vmware: Use BIT() macro for shifting

Merge tag 'ras_core_for_v6.0_rc1' of git://git./linux/kernel/git/tip/tip

Pull RAS update from Borislav Petkov:
"A single RAS change:

   - Probe whether hardware error injection (direct MSR writes) is
     possible when injecting errors on AMD platforms. In some cases, the
     platform could prohibit those"

* tag 'ras_core_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Check whether writes to MCA_STATUS are getting ignored

Merge tag 'fs.idmapped.overlay.acl.v5.20' of git://git./linux/kernel/git/brauner/linux

Pull acl updates from Christian Brauner:
"Last cycle we introduced support for mounting overlayfs on top of
  idmapped mounts. While looking into additional testing we realized
  that posix acls don't really work correctly with stacking filesystems
  on top of idmapped layers.

  We already knew what the fix were but it would require work that is
  more suitable for the merge window so we turned off posix acls for
  v5.19 for overlayfs on top of idmapped layers with Miklos routing my
  patch upstream in 72a8e05d4f66 ("Merge tag 'ovl-fixes-5.19-rc7' [..]").

  This contains the work to support posix acls for overlayfs on top of
  idmapped layers. Since the posix acl fixes should use the new
  vfs{g,u}id_t work the associated branch has been merged in. (We sent a
  pull request for this earlier.)

  We've also pulled in Miklos pull request containing my patch to turn
  of posix acls on top of idmapped layers. This allowed us to avoid
  rebasing the branch which we didn't like because we were already at
  rc7 by then. Merging it in allows this branch to first fix posix acls
  and then to cleanly revert the temporary fix it brought in by commit
  4a47c6385bb4 ("ovl: turn of SB_POSIXACL with idmapped layers
  temporarily").

  The last patch in this series adds Seth Forshee as a co-maintainer for
  idmapped mounts. Seth has been integral to all of this work and is
  also the main architect behind the filesystem idmapping work which
  ultimately made filesystems such as FUSE and overlayfs available in
  containers. He continues to be active in both development and review.
  I'm very happy he decided to help and he has my full trust. This
  increases the bus factor which is always great for work like this. I'm
  honestly very excited about this because I think in general we don't
  do great in the bringing on new maintainers department"

For more explanations of the ACL issues, see

  https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org/

* tag 'fs.idmapped.overlay.acl.v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  Add Seth Forshee as co-maintainer for idmapped mounts
  Revert "ovl: turn of SB_POSIXACL with idmapped layers temporarily"
  ovl: handle idmappings in ovl_get_acl()
  acl: make posix_acl_clone() available to overlayfs
  acl: port to vfs{g,u}id_t
  acl: move idmapped mount fixup into vfs_{g,s}etxattr()
  mnt_idmapping: add vfs[g,u]id_into_k[g,u]id()

Merge tag 'fs.idmapped.vfsuid.v5.20' of git://git./linux/kernel/git/brauner/linux

Pull fs idmapping updates from Christian Brauner:
"This introduces the new vfs{g,u}id_t types we agreed on. Similar to
  k{g,u}id_t the new types are just simple wrapper structs around
  regular {g,u}id_t types.

  They allow to establish a type safety boundary in the VFS for idmapped
  mounts preventing confusion betwen {g,u}ids mapped into an idmapped
  mount and {g,u}ids mapped into the caller's or the filesystem's
  idmapping.

  An initial set of helpers is introduced that allows to operate on
  vfs{g,u}id_t types. We will remove all references to non-type safe
  idmapped mounts helpers in the very near future. The patches do
  already exist.

  This converts the core attribute changing codepaths which become
  significantly easier to reason about because of this change.

  Just a few highlights here as the patches give detailed overviews of
  what is happening in the commit messages:

   - The kernel internal struct iattr contains type safe vfs{g,u}id_t
     values clearly communicating that these values have to take a given
     mount's idmapping into account.

   - The ownership values placed in struct iattr to change ownership are
     identical for idmapped and non-idmapped mounts going forward. This
     also allows to simplify stacking filesystems such as overlayfs that
     change attributes In other words, they always represent the values.

   - Instead of open coding checks for whether ownership changes have
     been requested and an actual update of the inode is required we now
     have small static inline wrappers that abstract this logic away
     removing a lot of code duplication from individual filesystems that
     all open-coded the same checks"

* tag 'fs.idmapped.vfsuid.v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  mnt_idmapping: align kernel doc and parameter order
  mnt_idmapping: use new helpers in mapped_fs{g,u}id()
  fs: port HAS_UNMAPPED_ID() to vfs{g,u}id_t
  mnt_idmapping: return false when comparing two invalid ids
  attr: fix kernel doc
  attr: port attribute changes to new types
  security: pass down mount idmapping to setattr hook
  quota: port quota helpers mount ids
  fs: port to iattr ownership update helpers
  fs: introduce tiny iattr ownership update helpers
  fs: use mount types in iattr
  fs: add two type safe mapping helpers
  mnt_idmapping: add vfs{g,u}id_t

Merge tag 'filelock-v6.0' of git://git./linux/kernel/git/jlayton/linux

Pull file locking updates from Jeff Layton:
"Just a couple of flock() patches from Kuniyuki Iwashima.

  The main change is that this moves a file_lock allocation from the
  slab to the stack"

* tag 'filelock-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  fs/lock: Rearrange ops in flock syscall.
  fs/lock: Don't allocate file_lock in flock_make_lock().

Merge tag 'erofs-for-5.20-rc1' of git://git./linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
"First of all, we'd like to add Yue Hu and Jeffle Xu as two new
  reviewers. Thank them for spending time working on EROFS!

  There is no major feature outstanding in this cycle, mainly a patchset
  I worked on to prepare for rolling hash deduplication and folios for
  compressed data as the next big features. It kills the unneeded
  PG_error flag dependency as well.

  Apart from that, there are bugfixes and cleanups as always. Details
  are listed below:

   - Add Yue Hu and Jeffle Xu as reviewers

   - Add the missing wake_up when updating lzma streams

   - Avoid consecutive detection for Highmem memory

   - Prepare for multi-reference pclusters and get rid of PG_error

   - Fix ctx->pos update for NFS export

   - minor cleanups"

* tag 'erofs-for-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: (23 commits)
  erofs: update ctx->pos for every emitted dirent
  erofs: get rid of the leftover PAGE_SIZE in dir.c
  erofs: get rid of erofs_prepare_dio() helper
  erofs: introduce multi-reference pclusters (fully-referenced)
  erofs: record the longest decompressed size in this round
  erofs: introduce z_erofs_do_decompressed_bvec()
  erofs: try to leave (de)compressed_pages on stack if possible
  erofs: introduce struct z_erofs_decompress_backend
  erofs: get rid of `z_pagemap_global'
  erofs: clean up `enum z_erofs_collectmode'
  erofs: get rid of `enum z_erofs_page_type'
  erofs: rework online page handling
  erofs: switch compressed_pages[] to bufvec
  erofs: introduce `z_erofs_parse_in_bvecs'
  erofs: drop the old pagevec approach
  erofs: introduce bufvec to store decompressed buffers
  erofs: introduce `z_erofs_parse_out_bvecs()'
  erofs: clean up z_erofs_collector_begin()
  erofs: get rid of unneeded `inode', `map' and `sb'
  erofs: avoid consecutive detection for Highmem memory
  ...

Merge tag 'fsnotify_for_v5.20-rc1' of git://git./linux/kernel/git/jack/linux-fs

Pull fsnotify updates from Jan Kara:

- support for FAN_MARK_IGNORE which untangles some of the not well
   defined corner cases with fanotify ignore masks

- small cleanups

* tag 'fsnotify_for_v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fsnotify: Fix comment typo
  fanotify: introduce FAN_MARK_IGNORE
  fanotify: cleanups for fanotify_mark() input validations
  fanotify: prepare for setting event flags in ignore mask
  fs: inotify: Fix typo in inotify comment

Merge tag 'fs_for_v5.20-rc1' of git://git./linux/kernel/git/jack/linux-fs

Pull ext2 and reiserfs updates from Jan Kara:
"A fix for ext2 handling of a corrupted fs image and cleanups in ext2
  and reiserfs"

* tag 'fs_for_v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2: Add more validity checks for inode counts
  fs/reiserfs/inode: remove dead code in _get_block_create_0()
  fs/ext2: replace ternary operator with min_t()

Merge tag 'dlm-6.0' of git://git./linux/kernel/git/teigland/linux-dlm

Pull dlm updates from David Teigland:

- Delay the cleanup of interrupted posix lock requests until the user
   space result arrives. Previously, the immediate cleanup would lead to
   extraneous warnings when the result arrived.

- Tracepoint improvements, e.g. adding the lock resource name.

- Delay the completion of lockspace creation until one full recovery
   cycle has completed. This allows more error cases to be returned to
   the caller.

- Remove warnings from the locking layer about delayed network replies.
   The recently added midcomms warnings are much more useful.

- Begin the process of deprecating two unused lock-timeout-related
   features. These features now require enabling via a Kconfig option,
   and enabling them triggers deprecation warnings. We expect to remove
   the code in v6.2.

* tag 'dlm-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  fs: dlm: move kref_put assert for lkb structs
  fs: dlm: don't use deprecated timeout features by default
  fs: dlm: add deprecation Kconfig and warnings for timeouts
  fs: dlm: remove timeout from dlm_user_adopt_orphan
  fs: dlm: remove waiter warnings
  fs: dlm: fix grammar in lowcomms output
  fs: dlm: add comment about lkb IFL flags
  fs: dlm: handle recovery result outside of ls_recover
  fs: dlm: make new_lockspace() wait until recovery completes
  fs: dlm: call dlm_lsop_recover_prep once
  fs: dlm: update comments about recovery and membership handling
  fs: dlm: add resource name to tracepoints
  fs: dlm: remove additional dereference of lksb
  fs: dlm: change ast and bast trace order
  fs: dlm: change posix lock sigint handling
  fs: dlm: use dlm_plock_info for do_unlock_close
  fs: dlm: change plock interrupted message to debug again
  fs: dlm: add pid to debug log
  fs: dlm: plock use list_first_entry

fs: dlm: move kref_put assert for lkb structs

The unhold_lkb() function decrements the lock's kref, and
asserts that the ref count was not the final one. Use the
kref_put release function (which should not be called) to
call the assert, rather than doing the assert based on the
kref_put return value. Using kill_lkb() as the release
function doesn't make sense if we only want to assert.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs: dlm: don't use deprecated timeout features by default

This patch will disable use of deprecated timeout features if
CONFIG_DLM_DEPRECATED_API is not set. The deprecated features
will be removed in upcoming kernel release v6.2.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs: dlm: add deprecation Kconfig and warnings for timeouts

This patch adds a CONFIG_DLM_DEPRECATED_API Kconfig option
that must be enabled to use two timeout-related features
that we intend to remove in kernel v6.2.  Warnings are
printed if either is enabled and used.  Neither has ever
been used as far as we know.

. The DLM_LSFL_TIMEWARN lockspace creation flag will be
  removed, along with the associated configfs entry for
  setting the timeout.  Setting the flag and configfs file
  would cause dlm to track how long locks were waiting
  for reply messages.  After a timeout, a kernel message
  would be logged, and a netlink message would be sent
  to userspace.  Recently, midcomms messages have been
  added that produce much better logging about actual
  problems with messages.  No use has ever been found
  for the netlink messages.

. The userspace libdlm API has allowed the DLM_LKF_TIMEOUT
  flag with a timeout value to be set in lock requests.
  The lock request would be cancelled after the timeout.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

Linux 5.19

Merge tag 'clk-fixes-for-linus' of git://git./linux/kernel/git/clk/linux

Pull clk fix from Stephen Boyd:
"One-liner fix of a NULL pointer deref in the Allwinner clk driver"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: sunxi-ng: Fix H6 RTC clock definition

Merge tag 'x86_urgent_for_v5.19' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

- Update the 'mitigations=' kernel param documentation

- Check the IBPB feature flag before enabling IBPB in firmware calls
   because cloud vendors' fantasy when it comes to creating guest
   configurations is unlimited

- Unexport sev_es_ghcb_hv_call() before 5.19 releases now that HyperV
   doesn't need it anymore

- Remove dead CONFIG_* items

* tag 'x86_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  docs/kernel-parameters: Update descriptions for "mitigations=" param with retbleed
  x86/bugs: Do not enable IBPB at firmware entry when IBPB is not available
  Revert "x86/sev: Expose sev_es_ghcb_hv_call() for use by HyperV"
  x86/configs: Update configs in x86_debug.config

Merge tag 'locking_urgent_for_v5.19' of git://git./linux/kernel/git/tip/tip

Pull locking fix from Borislav Petkov:

- Avoid rwsem lockups in certain situations when handling the handoff
bit

* tag 'locking_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/rwsem: Allow slowpath writer to ignore handoff bit if not set by first waiter

Merge tag 'edac_urgent_for_v5.19' of git://git./linux/kernel/git/ras/ras

Pull EDAC fixes from Borislav Petkov:

- Relax the condition under which the DIMM label in ghes_edac is set in
   order to accomodate an HPE BIOS which sets only the device but not
   the bank

- Two forgotten fixes to synopsys_edac when handling error interrupts

* tag 'edac_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/ghes: Set the DIMM label unconditionally
  EDAC/synopsys: Re-enable the error interrupts on v3 hw
  EDAC/synopsys: Use the correct register to disable the error interrupt on v3 hw

erofs: update ctx->pos for every emitted dirent

erofs_readdir update ctx->pos after filling a batch of dentries
and it may cause dir/files duplication for NFS readdirplus which
depends on ctx->pos to fill dir correctly. So update ctx->pos for
every emitted dirent in erofs_fill_dentries to fix it.

Also fix the update of ctx->pos when the initial file position has
exceeded nameoff.

Fixes: 3e917cc305c6 ("erofs: make filesystem exportable")
Signed-off-by: Hongnan Li <hongnan.li@linux.alibaba.com>
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20220722082732.30935-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
"Last set of ARM fixes for 5.19:

   - fix for MAX_DMA_ADDRESS overflow

   - fix for find_*_bit performing an out of bounds memory access"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: findbit: fix overflowing offset
  ARM: 9216/1: Fix MAX_DMA_ADDRESS overflow

locking/rwsem: Allow slowpath writer to ignore handoff bit if not set by first waiter

With commit d257cc8cb8d5 ("locking/rwsem: Make handoff bit handling more
consistent"), the writer that sets the handoff bit can be interrupted
out without clearing the bit if the wait queue isn't empty. This disables
reader and writer optimistic lock spinning and stealing.

Now if a non-first writer in the queue is somehow woken up or a new
waiter enters the slowpath, it can't acquire the lock. This is not the
case before commit d257cc8cb8d5 as the writer that set the handoff bit
will clear it when exiting out via the out_nolock path. This is less
efficient as the busy rwsem stays in an unlock state for a longer time.

In some cases, this new behavior may cause lockups as shown in [1] and
[2].

This patch allows a non-first writer to ignore the handoff bit if it
is not originally set or initiated by the first waiter. This patch is
shown to be effective in fixing the lockup problem reported in [1].

[1] https://lore.kernel.org/lkml/20220617134325.GC30825@techsingularity.net/
[2] https://lore.kernel.org/lkml/3f02975c-1a9d-be20-32cf-f1d8e3dfafcc@oracle.com/

Fixes: d257cc8cb8d5 ("locking/rwsem: Make handoff bit handling more consistent")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: John Donnelly <john.p.donnelly@oracle.com>
Tested-by: Mel Gorman <mgorman@techsingularity.net>
Link: https://lore.kernel.org/r/20220622200419.778799-1-longman@redhat.com

Merge tag 'mm-hotfixes-stable-2022-07-29' of git://git./linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
"Two hotfixes, both cc:stable"

* tag 'mm-hotfixes-stable-2022-07-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/hmm: fault non-owner device private entries
page_alloc: fix invalid watermark check on a negative value

Merge tag 'block-5.19-2022-07-29' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
"Just a single fix for NVMe, yet another quirk addition"

* tag 'block-5.19-2022-07-29' of git://git.kernel.dk/linux-block:
nvme-pci: Crucial P2 has bogus namespace ids

Merge tag 'drm-fixes-2022-07-30' of git://anongit.freedesktop.org/drm/drm

Pull more drm fixes from Dave Airlie:
"Maxime had the dog^Wmailing list server eat his homework^Wmisc pull
  request.

  Two more small fixes, one in nouveau svm code and the other in
  simpledrm.

  nouveau:
   - page migration fix

  simpledrm:
   - fix mode_valid return value"

* tag 'drm-fixes-2022-07-30' of git://anongit.freedesktop.org/drm/drm:
  nouveau/svm: Fix to migrate all requested pages
  drm/simpledrm: Fix return type of simpledrm_simple_display_pipe_mode_valid()

Merge tag 'drm-misc-fixes-2022-07-29' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

One fix to fix simpledrm mode_valid return value, and one for page
migration in nouveau

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220729094514.sfzhc3gqjgwgal62@penduick

Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
"Four fixes, three in drivers.

  The two biggest fixes are ufs and the remaining driver and core fix
  are small and obvious (and the core fix is low risk)"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Fix a race condition related to device management
  scsi: core: Fix warning in scsi_alloc_sgtables()
  scsi: ufs: host: Hold reference returned by of_parse_phandle()
  scsi: mpt3sas: Stop fw fault watchdog work item during system shutdown

docs/kernel-parameters: Update descriptions for "mitigations=" param with retbleed

Updates descriptions for "mitigations=off" and "mitigations=auto,nosmt"
with the respective retbleed= settings.

Signed-off-by: Eiichi Tsukata <eiichi.tsukata@nutanix.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: corbet@lwn.net
Link: https://lore.kernel.org/r/20220728043907.165688-1-eiichi.tsukata@nutanix.com

mm/hmm: fault non-owner device private entries

If hmm_range_fault() is called with the HMM_PFN_REQ_FAULT flag and a
device private PTE is found, the hmm_range::dev_private_owner page is used
to determine if the device private page should not be faulted in.
However, if the device private page is not owned by the caller,
hmm_range_fault() returns an error instead of calling migrate_to_ram() to
fault in the page.

For example, if a page is migrated to GPU private memory and a RDMA fault
capable NIC tries to read the migrated page, without this patch it will
get an error. With this patch, the page will be migrated back to system
memory and the NIC will be able to read the data.

Link: https://lkml.kernel.org/r/20220727000837.4128709-2-rcampbell@nvidia.com
Link: https://lkml.kernel.org/r/20220725183615.4118795-2-rcampbell@nvidia.com
Fixes: 08ddddda667b ("mm/hmm: check the device private page owner in hmm_range_fault()")
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reported-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Cc: Philip Yang <Philip.Yang@amd.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

page_alloc: fix invalid watermark check on a negative value

There was a report that a task is waiting at the
throttle_direct_reclaim. The pgscan_direct_throttle in vmstat was
increasing.

This is a bug where zone_watermark_fast returns true even when the free
is very low. The commit f27ce0e14088 ("page_alloc: consider highatomic
reserve in watermark fast") changed the watermark fast to consider
highatomic reserve. But it did not handle a negative value case which
can be happened when reserved_highatomic pageblock is bigger than the
actual free.

If watermark is considered as ok for the negative value, allocating
contexts for order-0 will consume all free pages without direct reclaim,
and finally free page may become depleted except highatomic free.

Then allocating contexts may fall into throttle_direct_reclaim. This
symptom may easily happen in a system where wmark min is low and other
reclaimers like kswapd does not make free pages quickly.

Handle the negative case by using MIN.

Link: https://lkml.kernel.org/r/20220725095212.25388-1-jaewon31.kim@samsung.com
Fixes: f27ce0e14088 ("page_alloc: consider highatomic reserve in watermark fast")
Signed-off-by: Jaewon Kim <jaewon31.kim@samsung.com>
Reported-by: GyeongHwan Hong <gh21.hong@samsung.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Yong-Taek Lee <ytk.lee@samsung.com>
Cc: <stable@vger.kerenl.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Merge tag 'perf-tools-fixes-for-v5.19-2022-07-29' of git://git./linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

- Fix addresses for bss symbols, describing variables used in resolving
   data access in tools such as 'perf c2c' and 'perf mem'.

- Skip symbols if SHF_ALLOC flag is not set, a technique used for
   listing deprecated symbols, its addresses are zeros, so not useful.

- Remove undefined behavior from bpf_perf_object__next() when dealing
   with an empty bpf_objects_list list.

- Make a ARM CoreSight disasm script work with both python2 and
   python3.

- Sync x86's cpufeatures header with with the kernel sources.

* tag 'perf-tools-fixes-for-v5.19-2022-07-29' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf bpf: Remove undefined behavior from bpf_perf_object__next()
  perf symbol: Skip symbols if SHF_ALLOC flag is not set
  perf symbol: Correct address for bss symbols
  perf scripts python: Let script to be python2 compliant
  tools headers cpufeatures: Sync with the kernel sources

Merge tag 'wq-for-5.19-rc8-fixes' of git://git./linux/kernel/git/tj/wq

Pull workqueue fix from Tejun Heo:
"Just one commit to suppress a spurious warning added during the 5.19
cycle"

* tag 'wq-for-5.19-rc8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: Avoid a false warning in unbind_workers()

Merge tag 'pm-5.19-rc9' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
"Make some false positive RCU splats resulting from a recent intel_idle
driver change go away (Waiman Long)"

* tag 'pm-5.19-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
intel_idle: Fix false positive RCU splats due to incorrect hardirqs state

workqueue: Avoid a false warning in unbind_workers()

Doing set_cpus_allowed_ptr() with wq_unbound_cpumask can be possible
fails and trigger the false warning.

Use cpu_possible_mask instead when wq_unbound_cpumask has no active CPUs.

It is very easy to trigger the warning:
  Set wq_unbound_cpumask to a small set of CPUs.
  Offline all the CPUs of wq_unbound_cpumask.
  Offline an extra CPU and trigger the warning.

Fixes: 10a5a651e3af ("workqueue: Restrict kworker in the offline CPU pool running on housekeeping CPUs")
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Merge tag 'riscv-for-linus-5.19-rc9' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fix from Palmer Dabbelt:
"A build fix for 'make vdso_install' that avoids an issue trying to
install the compat VDSO"

* tag 'riscv-for-linus-5.19-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: compat: vdso: Fix vdso_install target

Merge tag 'loongarch-fixes-5.19-5' of git://git./linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:

- Fix cache size calculation, stack protection attributes, ptrace's
   fpr_set and "ROM Size" in boardinfo

- Some cleanups and improvements of assembly

- Some cleanups of unused code and useless code

* tag 'loongarch-fixes-5.19-5' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: Fix wrong "ROM Size" of boardinfo
  LoongArch: Fix missing fcsr in ptrace's fpr_set
  LoongArch: Fix shared cache size calculation
  LoongArch: Disable executable stack by default
  LoongArch: Remove unused variables
  LoongArch: Remove clock setting during cpu hotplug stage
  LoongArch: Remove useless header compiler.h
  LoongArch: Remove several syntactic sugar macros for branches
  LoongArch: Re-tab the assembly files
  LoongArch: Simplify "BGT foo, zero" with BGTZ
  LoongArch: Simplify "BLT foo, zero" with BLTZ
  LoongArch: Simplify "BEQ/BNE foo, zero" with BEQZ/BNEZ
  LoongArch: Use the "move" pseudo-instruction where applicable
  LoongArch: Use the "jr" pseudo-instruction where applicable
  LoongArch: Use ABI names of registers where appropriate

Merge tag 'powerpc-5.19-6' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

- Re-enable the new amdgpu display engine for powerpc, as long as the
   compiler is correctly configured.

- Disable stack variable initialisation in prom_init to fix GCC 12
   allmodconfig.

Thanks to Dan Horák and Sudip Mukherjee.

* tag 'powerpc-5.19-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  drm/amdgpu: Re-enable DCN for 64-bit powerpc
  powerpc/64s: Disable stack variable initialisation for prom_init

LoongArch: Fix wrong "ROM Size" of boardinfo

We can see the "ROM Size" is different in the following outputs:

[root@linux loongson]# cat /sys/firmware/loongson/boardinfo
BIOS Information
Vendor                  : Loongson
Version                 : vUDK2018-LoongArch-V2.0.pre-beta8
ROM Size                : 63 KB
Release Date            : 06/15/2022

Board Information
Manufacturer            : Loongson
Board Name              : Loongson-LS3A5000-7A1000-1w-A2101
Family                  : LOONGSON64

[root@linux loongson]# dmidecode | head -11
...
Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
Vendor: Loongson
Version: vUDK2018-LoongArch-V2.0.pre-beta8
Release Date: 06/15/2022
ROM Size: 4 MB

According to "BIOS Information (Type 0) structure" in the SMBIOS
Reference Specification [1], it shows 64K * (n+1) is the size of
the physical device containing the BIOS if the size is less than
16M.

Additionally, we can see the related code in dmidecode [2]:

  u64 s = { .l = (code1 + 1) << 6 };

So the output of dmidecode is correct, the output of boardinfo
is wrong, fix it.

By the way, at present no need to consider the size is 16M or
greater on LoongArch, because it is usually 4M or 8M which is
enough to use.

[1] https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf
[2] https://git.savannah.nongnu.org/cgit/dmidecode.git/tree/dmidecode.c#n347

Fixes: 628c3bb40e9a ("LoongArch: Add boot and setup routines")
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Fix missing fcsr in ptrace's fpr_set

In file ptrace.c, function fpr_set does not copy fcsr data from ubuf
to kbuf. That's the reason why fcsr cannot be modified by ptrace.

This patch fixs this problem and allows users using ptrace to modify
the fcsr.

Co-developed-by: Xu Li <lixu@loongson.cn>
Signed-off-by: Qi Hu <huqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Fix shared cache size calculation

Current calculation of shared cache size is from the node (die) scope,
but we hope 'lscpu' to show the shared cache size of the whole package
for multi-die chips (e.g., Loongson-3C5000L, which contains 4 dies in
one package). So fix it by multiplying nodes_per_package.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Disable executable stack by default

Disable executable stack for LoongArch by default, as all modern
architectures do.

Reported-by: Andreas Schwab <schwab@suse.de>
Suggested-by: WANG Xuerui <git@xen0n.name>
Link: https://sourceware.org/pipermail/binutils/2022-July/121992.html
Tested-by: WANG Xuerui <git@xen0n.name>
Tested-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Remove unused variables

There are some variables never used or referenced, this patch
removes these varaibles and make the code cleaner.

Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Remove clock setting during cpu hotplug stage

On physical machine we can save power by disabling clock of hot removed
cpu. However as different platforms require different methods to
configure clocks, the code is platform-specific, and probably belongs to
firmware/pmu or cpu regulator, rather than generic arch/loongarch code.

Also, there is no such register on QEMU virt machine since the
clock/frequency regulation is not emulated.

This patch removes the hard-coded clock register accesses in generic
LoongArch cpu hotplug flow.

Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Remove useless header compiler.h

The content of LoongArch's compiler.h is trivial, with some unused
anywhere, so inline the definitions and remove the header.

Signed-off-by: Jun Yi <yijun@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Remove several syntactic sugar macros for branches

These syntactic sugars have been supported by upstream binutils from the
beginning, so no need to patch them locally.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Re-tab the assembly files

Reflow the *.S files for better stylistic consistency, namely hard tabs
after mnemonic position, and vertical alignment of the first operand
with hard tabs. Tab width is obviously 8. Some pre-existing intra-block
vertical alignments are preserved.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Simplify "BGT foo, zero" with BGTZ

Support for the syntactic sugar is present in upstream binutils port
from the beginning. Use it for shorter lines and better consistency.
Generated code should be identical.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Simplify "BLT foo, zero" with BLTZ

Support for the syntactic sugar is present in upstream binutils port
from the beginning. Use it for shorter lines and better consistency.
Generated code should be identical.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Simplify "BEQ/BNE foo, zero" with BEQZ/BNEZ

While B{EQ,NE}Z and B{EQ,NE} are different instructions, and the vastly
expanded range for branch destination does not really matter in the few
cases touched, use the B{EQ,NE}Z where possible for shorter lines and
better consistency (e.g. some places used "BEQ foo, zero", while some
used "BEQ zero, foo").

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Use the "move" pseudo-instruction where applicable

Some of the assembly code in the LoongArch port likely originated
from a time when the assembler did not support pseudo-instructions like
"move" or "jr", so the desugared form was used and readability suffers
(to a minor degree) as a result.

As the upstream toolchain supports these pseudo-instructions from the
beginning, migrate the existing few usages to them for better
readability.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Use the "jr" pseudo-instruction where applicable

Some of the assembly code in the LoongArch port likely originated
from a time when the assembler did not support pseudo-instructions like
"move" or "jr", so the desugared form was used and readability suffers
(to a minor degree) as a result.

As the upstream toolchain supports these pseudo-instructions from the
beginning, migrate the existing few usages to them for better
readability.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch: Use ABI names of registers where appropriate

Some of the assembly in the LoongArch port seem to come from a
prehistoric time, when the assembler didn't even have support for the
ABI names we all come to know and love, thus used raw register numbers
which hampered readability.

The usages are found with a regex match inside arch/loongarch, then
manually adjusted for those non-definitions.

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

ARM: findbit: fix overflowing offset

When offset is larger than the size of the bit array, we should not
attempt to access the array as we can perform an access beyond the
end of the array. Fix this by changing the pre-condition.

Using "cmp r2, r1; bhs ..." covers us for the size == 0 case, since
this will always take the branch when r1 is zero, irrespective of
the value of r2. This means we can fix this bug without adding any
additional code!

Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

x86/bugs: Do not enable IBPB at firmware entry when IBPB is not available

Some cloud hypervisors do not provide IBPB on very recent CPU processors,
including AMD processors affected by Retbleed.

Using IBPB before firmware calls on such systems would cause a GPF at boot
like the one below. Do not enable such calls when IBPB support is not
present.

  EFI Variables Facility v0.08 2004-May-17
  general protection fault, maybe for address 0x1: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 0 PID: 24 Comm: kworker/u2:1 Not tainted 5.19.0-rc8+ #7
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015
  Workqueue: efi_rts_wq efi_call_rts
  RIP: 0010:efi_call_rts
  Code: e8 37 33 58 ff 41 bf 48 00 00 00 49 89 c0 44 89 f9 48 83 c8 01 4c 89 c2 48 c1 ea 20 66 90 b9 49 00 00 00 b8 01 00 00 00 31 d2 <0f> 30 e8 7b 9f 5d ff e8 f6 f8 ff ff 4c 89 f1 4c 89 ea 4c 89 e6 48
  RSP: 0018:ffffb373800d7e38 EFLAGS: 00010246
  RAX: 0000000000000001 RBX: 0000000000000006 RCX: 0000000000000049
  RDX: 0000000000000000 RSI: ffff94fbc19d8fe0 RDI: ffff94fbc1b2b300
  RBP: ffffb373800d7e70 R08: 0000000000000000 R09: 0000000000000000
  R10: 000000000000000b R11: 000000000000000b R12: ffffb3738001fd78
  R13: ffff94fbc2fcfc00 R14: ffffb3738001fd80 R15: 0000000000000048
  FS:  0000000000000000(0000) GS:ffff94fc3da00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: ffff94fc30201000 CR3: 000000006f610000 CR4: 00000000000406f0
  Call Trace:
   <TASK>
   ? __wake_up
   process_one_work
   worker_thread
   ? rescuer_thread
   kthread
   ? kthread_complete_and_exit
   ret_from_fork
   </TASK>
  Modules linked in:

Fixes: 28a99e95f55c ("x86/amd: Use IBPB for firmware calls")
Reported-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220728122602.2500509-1-cascardo@canonical.com

Merge tag 'drm-fixes-2022-07-29' of git://anongit.freedesktop.org/drm/drm

Pull drm fix from Dave Airlie:
"Quiet extra week, just a single fix for i915 workaround with execlist
  backend.

  i915:

   - Further reset robustness improvements for execlists [Wa_22011802037]"

* tag 'drm-fixes-2022-07-29' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/reset: Add additional steps for Wa_22011802037 for execlist backend

Merge tag 'drm-intel-fixes-2022-07-28-1' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Further reset robustness improvements for execlists [Wa_22011802037] (Umesh Nerlige Ramappa)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YuJIWaEbKcs/q0NY@tursulin-desk

nouveau/svm: Fix to migrate all requested pages

Users may request that pages from an OpenCL SVM allocation be migrated
to the GPU with clEnqueueSVMMigrateMem(). In Nouveau this will call into
nouveau_dmem_migrate_vma() to do the migration. If the total range to be
migrated exceeds SG_MAX_SINGLE_ALLOC the pages will be migrated in
chunks of size SG_MAX_SINGLE_ALLOC. However a typo in updating the
starting address means that only the first chunk will get migrated.

Fix the calculation so that the entire range will get migrated if
possible.

Signed-off-by: Alistair Popple <apopple@nvidia.com>
Fixes: e3d8b0890469 ("drm/nouveau/svm: map pages after migration")
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220720062745.960701-1-apopple@nvidia.com
Cc: <stable@vger.kernel.org> # v5.8+

Merge tag 'net-5.19-final' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
"Including fixes from bluetooth and netfilter, no known blockers for
  the release.

  Current release - regressions:

   - wifi: mac80211: do not abuse fq.lock in ieee80211_do_stop(), fix
     taking the lock before its initialized

   - Bluetooth: mgmt: fix double free on error path

  Current release - new code bugs:

   - eth: ice: fix tunnel checksum offload with fragmented traffic

  Previous releases - regressions:

   - tcp: md5: fix IPv4-mapped support after refactoring, don't take the
     pure v6 path

   - Revert "tcp: change pingpong threshold to 3", improving detection
     of interactive sessions

   - mld: fix netdev refcount leak in mld_{query | report}_work() due to
     a race

   - Bluetooth:
      - always set event mask on suspend, avoid early wake ups
      - L2CAP: fix use-after-free caused by l2cap_chan_put

   - bridge: do not send empty IFLA_AF_SPEC attribute

  Previous releases - always broken:

   - ping6: fix memleak in ipv6_renew_options()

   - sctp: prevent null-deref caused by over-eager error paths

   - virtio-net: fix the race between refill work and close, resulting
     in NAPI scheduled after close and a BUG()

   - macsec:
      - fix three netlink parsing bugs
      - avoid breaking the device state on invalid change requests
      - fix a memleak in another error path

  Misc:

   - dt-bindings: net: ethernet-controller: rework 'fixed-link' schema

   - two more batches of sysctl data race adornment"

* tag 'net-5.19-final' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (67 commits)
  stmmac: dwmac-mediatek: fix resource leak in probe
  ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr
  net: ping6: Fix memleak in ipv6_renew_options().
  net/funeth: Fix fun_xdp_tx() and XDP packet reclaim
  sctp: leave the err path free in sctp_stream_init to sctp_stream_free
  sfc: disable softirqs for ptp TX
  ptp: ocp: Select CRC16 in the Kconfig.
  tcp: md5: fix IPv4-mapped support
  virtio-net: fix the race between refill work and close
  mptcp: Do not return EINPROGRESS when subflow creation succeeds
  Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put
  Bluetooth: Always set event mask on suspend
  Bluetooth: mgmt: Fix double free on error path
  wifi: mac80211: do not abuse fq.lock in ieee80211_do_stop()
  ice: do not setup vlan for loopback VSI
  ice: check (DD | EOF) bits on Rx descriptor rather than (EOP | RS)
  ice: Fix VSIs unable to share unicast MAC
  ice: Fix tunnel checksum offload with fragmented traffic
  ice: Fix max VLANs available for VF
  netfilter: nft_queue: only allow supported familes and hooks
  ...

stmmac: dwmac-mediatek: fix resource leak in probe

If mediatek_dwmac_clks_config() fails, then call stmmac_remove_config_dt()
before returning. Otherwise it is a resource leak.

Fixes: fa4b3ca60e80 ("stmmac: dwmac-mediatek: fix clock issue")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YuJ4aZyMUlG6yGGa@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr

Change net device's MTU to smaller than IPV6_MIN_MTU or unregister
device while matching route. That may trigger null-ptr-deref bug
for ip6_ptr probability as following.

=========================================================
BUG: KASAN: null-ptr-deref in find_match.part.0+0x70/0x134
Read of size 4 at addr 0000000000000308 by task ping6/263

CPU: 2 PID: 263 Comm: ping6 Not tainted 5.19.0-rc7+ #14
Call trace:
dump_backtrace+0x1a8/0x230
show_stack+0x20/0x70
dump_stack_lvl+0x68/0x84
print_report+0xc4/0x120
kasan_report+0x84/0x120
__asan_load4+0x94/0xd0
find_match.part.0+0x70/0x134
__find_rr_leaf+0x408/0x470
fib6_table_lookup+0x264/0x540
ip6_pol_route+0xf4/0x260
ip6_pol_route_output+0x58/0x70
fib6_rule_lookup+0x1a8/0x330
ip6_route_output_flags_noref+0xd8/0x1a0
ip6_route_output_flags+0x58/0x160
ip6_dst_lookup_tail+0x5b4/0x85c
ip6_dst_lookup_flow+0x98/0x120
rawv6_sendmsg+0x49c/0xc70
inet_sendmsg+0x68/0x94

Reproducer as following:
Firstly, prepare conditions:
$ip netns add ns1
$ip netns add ns2
$ip link add veth1 type veth peer name veth2
$ip link set veth1 netns ns1
$ip link set veth2 netns ns2
$ip netns exec ns1 ip -6 addr add 2001:0db8:0:f101::1/64 dev veth1
$ip netns exec ns2 ip -6 addr add 2001:0db8:0:f101::2/64 dev veth2
$ip netns exec ns1 ifconfig veth1 up
$ip netns exec ns2 ifconfig veth2 up
$ip netns exec ns1 ip -6 route add 2000::/64 dev veth1 metric 1
$ip netns exec ns2 ip -6 route add 2001::/64 dev veth2 metric 1

Secondly, execute the following two commands in two ssh windows
respectively:
$ip netns exec ns1 sh
$while true; do ip -6 addr add 2001:0db8:0:f101::1/64 dev veth1; ip -6 route add 2000::/64 dev veth1 metric 1; ping6 2000::2; done

$ip netns exec ns1 sh
$while true; do ip link set veth1 mtu 1000; ip link set veth1 mtu 1500; sleep 5; done

It is because ip6_ptr has been assigned to NULL in addrconf_ifdown() firstly,
then ip6_ignore_linkdown() accesses ip6_ptr directly without NULL check.

cpu0 cpu1
fib6_table_lookup
__find_rr_leaf
addrconf_notify [ NETDEV_CHANGEMTU ]
addrconf_ifdown
RCU_INIT_POINTER(dev->ip6_ptr, NULL)
find_match
ip6_ignore_linkdown

So we can add NULL check for ip6_ptr before using in ip6_ignore_linkdown() to
fix the null-ptr-deref bug.

Fixes: dcd1f572954f ("net/ipv6: Remove fib6_idev")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220728013307.656257-1-william.xuanziyang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: ping6: Fix memleak in ipv6_renew_options().

When we close ping6 sockets, some resources are left unfreed because
pingv6_prot is missing sk->sk_prot->destroy().  As reported by
syzbot [0], just three syscalls leak 96 bytes and easily cause OOM.

    struct ipv6_sr_hdr *hdr;
    char data[24] = {0};
    int fd;

    hdr = (struct ipv6_sr_hdr *)data;
    hdr->hdrlen = 2;
    hdr->type = IPV6_SRCRT_TYPE_4;

    fd = socket(AF_INET6, SOCK_DGRAM, NEXTHDR_ICMP);
    setsockopt(fd, IPPROTO_IPV6, IPV6_RTHDR, data, 24);
    close(fd);

To fix memory leaks, let's add a destroy function.

Note the socket() syscall checks if the GID is within the range of
net.ipv4.ping_group_range.  The default value is [1, 0] so that no
GID meets the condition (1 <= GID <= 0).  Thus, the local DoS does
not succeed until we change the default value.  However, at least
Ubuntu/Fedora/RHEL loosen it.

    $ cat /usr/lib/sysctl.d/50-default.conf
    ...
    -net.ipv4.ping_group_range = 0 2147483647

Also, there could be another path reported with these options, and
some of them require CAP_NET_RAW.

  setsockopt
      IPV6_ADDRFORM (inet6_sk(sk)->pktoptions)
      IPV6_RECVPATHMTU (inet6_sk(sk)->rxpmtu)
      IPV6_HOPOPTS (inet6_sk(sk)->opt)
      IPV6_RTHDRDSTOPTS (inet6_sk(sk)->opt)
      IPV6_RTHDR (inet6_sk(sk)->opt)
      IPV6_DSTOPTS (inet6_sk(sk)->opt)
      IPV6_2292PKTOPTIONS (inet6_sk(sk)->opt)

  getsockopt
      IPV6_FLOWLABEL_MGR (inet6_sk(sk)->ipv6_fl_list)

For the record, I left a different splat with syzbot's one.

  unreferenced object 0xffff888006270c60 (size 96):
    comm "repro2", pid 231, jiffies 4294696626 (age 13.118s)
    hex dump (first 32 bytes):
      01 00 00 00 44 00 00 00 00 00 00 00 00 00 00 00  ....D...........
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace:
      [<00000000f6bc7ea9>] sock_kmalloc (net/core/sock.c:2564 net/core/sock.c:2554)
      [<000000006d699550>] do_ipv6_setsockopt.constprop.0 (net/ipv6/ipv6_sockglue.c:715)
      [<00000000c3c3b1f5>] ipv6_setsockopt (net/ipv6/ipv6_sockglue.c:1024)
      [<000000007096a025>] __sys_setsockopt (net/socket.c:2254)
      [<000000003a8ff47b>] __x64_sys_setsockopt (net/socket.c:2265 net/socket.c:2262 net/socket.c:2262)
      [<000000007c409dcb>] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
      [<00000000e939c4a9>] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)

[0]: https://syzkaller.appspot.com/bug?extid=a8430774139ec3ab7176

Fixes: 6d0bfe226116 ("net: ipv6: Add IPv6 support to the ping socket.")
Reported-by: syzbot+a8430774139ec3ab7176@syzkaller.appspotmail.com
Reported-by: Ayushman Dutta <ayudutta@amazon.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220728012220.46918-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

watch_queue: Fix missing locking in add_watch_to_object()

If a watch is being added to a queue, it needs to guard against
interference from addition of a new watch, manual removal of a watch and
removal of a watch due to some other queue being destroyed.

KEYCTL_WATCH_KEY guards against this for the same {key,queue} pair by
holding the key->sem writelocked and by holding refs on both the key and
the queue - but that doesn't prevent interaction from other {key,queue}
pairs.

While add_watch_to_object() does take the spinlock on the event queue,
it doesn't take the lock on the source's watch list. The assumption was
that the caller would prevent that (say by taking key->sem) - but that
doesn't prevent interference from the destruction of another queue.

Fix this by locking the watcher list in add_watch_to_object().

Fixes: c73be61cede5 ("pipe: Add general notification queue support")
Reported-by: syzbot+03d7b43290037d1f87ca@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: keyrings@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

watch_queue: Fix missing rcu annotation

Since __post_watch_notification() walks wlist->watchers with only the
RCU read lock held, we need to use RCU methods to add to the list (we
already use RCU methods to remove from the list).

Fix add_watch_to_object() to use hlist_add_head_rcu() instead of
hlist_add_head() for that list.

Fixes: c73be61cede5 ("pipe: Add general notification queue support")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/funeth: Fix fun_xdp_tx() and XDP packet reclaim

The current implementation of fun_xdp_tx(), used for XPD_TX, is
incorrect in that it takes an address/length pair and later releases it
with page_frag_free(). It is OK for XDP_TX but the same code is used by
ndo_xdp_xmit. In that case it loses the XDP memory type and releases the
packet incorrectly for some of the types. Assorted breakage follows.

Change fun_xdp_tx() to take xdp_frame and rely on xdp_return_frame() in
reclaim.

Fixes: db37bc177dae ("net/funeth: add the data path")
Signed-off-by: Dimitris Michailidis <dmichail@fungible.com>
Link: https://lore.kernel.org/r/20220726215923.7887-1-dmichail@fungible.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Merge branch '100GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2022-07-26

This series contains updates to ice driver only.

Przemyslaw corrects accounting for VF VLANs to allow for correct number
of VLANs for untrusted VF. He also correct issue with checksum offload
on VXLAN tunnels.

Ani allows for two VSIs to share the same MAC address.

Maciej corrects checked bits for descriptor completion of loopback

* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  ice: do not setup vlan for loopback VSI
  ice: check (DD | EOF) bits on Rx descriptor rather than (EOP | RS)
  ice: Fix VSIs unable to share unicast MAC
  ice: Fix tunnel checksum offload with fragmented traffic
  ice: Fix max VLANs available for VF
====================

Link: https://lore.kernel.org/r/20220726204646.2171589-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

sctp: leave the err path free in sctp_stream_init to sctp_stream_free

A NULL pointer dereference was reported by Wei Chen:

  BUG: kernel NULL pointer dereference, address: 0000000000000000
  RIP: 0010:__list_del_entry_valid+0x26/0x80
  Call Trace:
   <TASK>
   sctp_sched_dequeue_common+0x1c/0x90
   sctp_sched_prio_dequeue+0x67/0x80
   __sctp_outq_teardown+0x299/0x380
   sctp_outq_free+0x15/0x20
   sctp_association_free+0xc3/0x440
   sctp_do_sm+0x1ca7/0x2210
   sctp_assoc_bh_rcv+0x1f6/0x340

This happens when calling sctp_sendmsg without connecting to server first.
In this case, a data chunk already queues up in send queue of client side
when processing the INIT_ACK from server in sctp_process_init() where it
calls sctp_stream_init() to alloc stream_in. If it fails to alloc stream_in
all stream_out will be freed in sctp_stream_init's err path. Then in the
asoc freeing it will crash when dequeuing this data chunk as stream_out
is missing.

As we can't free stream out before dequeuing all data from send queue, and
this patch is to fix it by moving the err path stream_out/in freeing in
sctp_stream_init() to sctp_stream_free() which is eventually called when
freeing the asoc in sctp_association_free(). This fix also makes the code
in sctp_process_init() more clear.

Note that in sctp_association_init() when it fails in sctp_stream_init(),
sctp_association_free() will not be called, and in that case it should
go to 'stream_free' err path to free stream instead of 'fail_init'.

Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations")
Reported-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/831a3dc100c4908ff76e5bcc363be97f2778bc0b.1658787066.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

sfc: disable softirqs for ptp TX

Sending a PTP packet can imply to use the normal TX driver datapath but
invoked from the driver's ptp worker. The kernel generic TX code
disables softirqs and preemption before calling specific driver TX code,
but the ptp worker does not. Although current ptp driver functionality
does not require it, there are several reasons for doing so:

   1) The invoked code is always executed with softirqs disabled for non
      PTP packets.
   2) Better if a ptp packet transmission is not interrupted by softirq
      handling which could lead to high latencies.
   3) netdev_xmit_more used by the TX code requires preemption to be
      disabled.

Indeed a solution for dealing with kernel preemption state based on static
kernel configuration is not possible since the introduction of dynamic
preemption level configuration at boot time using the static calls
functionality.

Fixes: f79c957a0b537 ("drivers: net: sfc: use netdev_xmit_more helper")
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@amd.com>
Link: https://lore.kernel.org/r/20220726064504.49613-1-alejandro.lucero-palau@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

ptp: ocp: Select CRC16 in the Kconfig.

The crc16() function is used to check the firmware validity, but
the library was not explicitly selected.

Fixes: 3c3673bde50c ("ptp: ocp: Add firmware header checks")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Vadim Fedorenko <vadfed@fb.com>
Link: https://lore.kernel.org/r/20220726220604.1339972-1-jonathan.lemon@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

clk: sunxi-ng: Fix H6 RTC clock definition

While RTC clock was added in H616 ccu_common list, it was not in H6
list. That caused invalid pointer dereference like this:

Unable to handle kernel NULL pointer dereference at virtual address 000000000000020c
Mem abort info:
  ESR = 0x96000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000004d574000
[000000000000020c] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 96000004 [#1] PREEMPT SMP
CPU: 3 PID: 339 Comm: cat Tainted: G    B             5.18.0-rc1+ #1352
Hardware name: Tanix TX6 (DT)
pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ccu_gate_is_enabled+0x48/0x74
lr : ccu_gate_is_enabled+0x40/0x74
sp : ffff80000c0b76d0
x29: ffff80000c0b76d0 x28: 00000000016e3600 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000002 x24: ffff00000952fe08
x23: ffff800009611400 x22: ffff00000952fe79 x21: 0000000000000000
x20: 0000000000000001 x19: ffff80000aad6f08 x18: 0000000000000000
x17: 2d2d2d2d2d2d2d2d x16: 2d2d2d2d2d2d2d2d x15: 2d2d2d2d2d2d2d2d
x14: 0000000000000000 x13: 00000000f2f2f2f2 x12: ffff700001816e89
x11: 1ffff00001816e88 x10: ffff700001816e88 x9 : dfff800000000000
x8 : ffff80000c0b7447 x7 : 0000000000000001 x6 : ffff700001816e88
x5 : ffff80000c0b7440 x4 : 0000000000000001 x3 : ffff800008935c50
x2 : dfff800000000000 x1 : 0000000000000000 x0 : 000000000000020c
Call trace:
ccu_gate_is_enabled+0x48/0x74
clk_core_is_enabled+0x7c/0x1c0
clk_summary_show_subtree+0x1dc/0x334
clk_summary_show_subtree+0x250/0x334
clk_summary_show_subtree+0x250/0x334
clk_summary_show_subtree+0x250/0x334
clk_summary_show_subtree+0x250/0x334
clk_summary_show+0x90/0xdc
seq_read_iter+0x248/0x6d4
seq_read+0x17c/0x1fc
full_proxy_read+0x90/0xf0
vfs_read+0xdc/0x28c
ksys_read+0xc8/0x174
__arm64_sys_read+0x44/0x5c
invoke_syscall+0x60/0x190
el0_svc_common.constprop.0+0x7c/0x160
do_el0_svc+0x38/0xa0
el0_svc+0x68/0x160
el0t_64_sync_handler+0x10c/0x140
el0t_64_sync+0x18c/0x190
Code: d1006260 97e5c981 785e8260 8b0002a0 (b9400000)
---[ end trace 0000000000000000 ]---

Fix that by adding rtc clock to H6 ccu_common list too.

Fixes: 38d321b61bda ("clk: sunxi-ng: h6-r: Add RTC gate clock")
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220719183725.2605141-1-jernej.skrabec@gmail.com
Reviewed-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

tcp: md5: fix IPv4-mapped support

After the blamed commit, IPv4 SYN packets handled
by a dual stack IPv6 socket are dropped, even if
perfectly valid.

$ nstat | grep MD5
TcpExtTCPMD5Failure 5 0.0

For a dual stack listener, an incoming IPv4 SYN packet
would call tcp_inbound_md5_hash() with @family == AF_INET,
while tp->af_specific is pointing to tcp_sock_ipv6_specific.

Only later when an IPv4-mapped child is created, tp->af_specific
is changed to tcp_sock_ipv6_mapped_specific.

Fixes: 7bbb765b7349 ("net/tcp: Merge TCP-MD5 inbound callbacks")
Reported-by: Brian Vazquez <brianvv@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Dmitry Safonov <dima@arista.com>
Tested-by: Leonard Crestez <cdleonard@gmail.com>
Link: https://lore.kernel.org/r/20220726115743.2759832-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

ARM: 9216/1: Fix MAX_DMA_ADDRESS overflow

Commit 26f09e9b3a06 ("mm/memblock: add memblock memory allocation apis")
added a check to determine whether arm_dma_zone_size is exceeding the
amount of kernel virtual address space available between the upper 4GB
virtual address limit and PAGE_OFFSET in order to provide a suitable
definition of MAX_DMA_ADDRESS that should fit within the 32-bit virtual
address space. The quantity used for comparison was off by a missing
trailing 0, leading to MAX_DMA_ADDRESS to be overflowing a 32-bit
quantity.

This was caught thanks to CONFIG_DEBUG_VIRTUAL on the bcm2711 platform
where we define a dma_zone_size of 1GB and we have a PAGE_OFFSET value
of 0xc000_0000 (CONFIG_VMSPLIT_3G) leading to MAX_DMA_ADDRESS being
0x1_0000_0000 which overflows the unsigned long type used throughout
__pa() and then __virt_addr_valid(). Because the virtual address passed
to __virt_addr_valid() would now be 0, the function would loudly warn
and flood the kernel log, thus making the platform unable to boot
properly.

Fixes: 26f09e9b3a06 ("mm/memblock: add memblock memory allocation apis")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Merge tag 'asm-generic-fixes-5.19-2' of git://git./linux/kernel/git/arnd/asm-generic

Pull asm-generic fixes from Arnd Bergmann:
"Two more bug fixes for asm-generic, one addressing an incorrect
  Kconfig symbol reference and another one fixing a build failure for
  the perf tool on mips and possibly others"

* tag 'asm-generic-fixes-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: remove a broken and needless ifdef conditional
  tools: Fixed MIPS builds due to struct flock re-definition

Merge tag 'soc-fixes-5.19-4' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
"One last set of changes for the soc tree:

   - fix clock frequency on lan966x

   - fix incorrect GPIO numbers on some pxa machines

   - update Baolin's email address"

* tag 'soc-fixes-5.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: pxa2xx: Fix GPIO descriptor tables
  mailmap: update Baolin Wang's email
  ARM: dts: lan966x: fix sys_clk frequency

Revert "x86/sev: Expose sev_es_ghcb_hv_call() for use by HyperV"

This reverts commit 007faec014cb5d26983c1f86fd08c6539b41392e.

Now that hyperv does its own protocol negotiation:

49d6a3c062a1 ("x86/Hyper-V: Add SEV negotiate protocol support in Isolation VM")

revert this exposure of the sev_es_ghcb_hv_call() helper.

Cc: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by：Tianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/r/20220614014553.1915929-1-ltykernel@gmail.com

x86/configs: Update configs in x86_debug.config

Commit

4675ff05de2d ("kmemcheck: rip it out")

removed kmemcheck and its corresponding build config KMEMCHECK.

Commit

0f620cefd775 ("objtool: Rename "VMLINUX_VALIDATION" -> "NOINSTR_VALIDATION"")

renamed the debug config option.

Adjust x86_debug.config to those changes in debug configs.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220722121815.27535-1-lukas.bulwahn@gmail.com

Merge tag 'nvme-5.19-2022-07-27' of git://git.infradead.org/nvme into block-5.19

Pull NVMe fix from Christoph:

"nvme fix for Linux 5.19

- yet another duplicate ID quirk (Tobias Gruetzmacher)"

* tag 'nvme-5.19-2022-07-27' of git://git.infradead.org/nvme:
nvme-pci: Crucial P2 has bogus namespace ids

perf bpf: Remove undefined behavior from bpf_perf_object__next()

bpf_perf_object__next() folded the last element in the list test with the
empty list test. However, this meant that offsets were computed against
null and that a struct list_head was compared against a 'struct
bpf_perf_object'.

Working around this with clang's undefined behavior sanitizer required
-fno-sanitize=null and -fno-sanitize=object-size.

Remove the undefined behavior by using the regular Linux list APIs and
handling the starting case separately from the end testing case.

Looking at uses like bpf_perf_object__for_each(), as the constant NULL
or non-NULL argument can be constant propagated, the code is no less
efficient.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Christy Lee <christylee@fb.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Rix <trix@redhat.com>
Cc: bpf@vger.kernel.org
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20220726220921.2567761-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf symbol: Skip symbols if SHF_ALLOC flag is not set

Some symbols are observed with the 'st_value' field zeroed. E.g.
libc.so.6 in Ubuntu contains a symbol '__evoke_link_warning_getwd' which
resides in the '.gnu.warning.getwd' section.

Unlike normal sections, such kind of sections are used for linker
warning when a file calls deprecated functions, but they are not part of
memory images, the symbols in these sections should be dropped.

This patch checks the section attribute SHF_ALLOC bit, if the bit is not
set, it skips symbols to avoid spurious ones.

Suggested-by: Fangrui Song <maskray@google.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Chang Rui <changruinj@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220724060013.171050-3-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf symbol: Correct address for bss symbols

When using 'perf mem' and 'perf c2c', an issue is observed that tool
reports the wrong offset for global data symbols.  This is a common
issue on both x86 and Arm64 platforms.

Let's see an example, for a test program, below is the disassembly for
its .bss section which is dumped with objdump:

  ...

  Disassembly of section .bss:

  0000000000004040 <completed.0>:
   ...

  0000000000004080 <buf1>:
   ...

  00000000000040c0 <buf2>:
   ...

  0000000000004100 <thread>:
   ...

First we used 'perf mem record' to run the test program and then used
'perf --debug verbose=4 mem report' to observe what's the symbol info
for 'buf1' and 'buf2' structures.

  # ./perf mem record -e ldlat-loads,ldlat-stores -- false_sharing.exe 8
  # ./perf --debug verbose=4 mem report
    ...
    dso__load_sym_internal: adjusting symbol: st_value: 0x40c0 sh_addr: 0x4040 sh_offset: 0x3028
    symbol__new: buf2 0x30a8-0x30e8
    ...
    dso__load_sym_internal: adjusting symbol: st_value: 0x4080 sh_addr: 0x4040 sh_offset: 0x3028
    symbol__new: buf1 0x3068-0x30a8
    ...

The perf tool relies on libelf to parse symbols, in executable and
shared object files, 'st_value' holds a virtual address; 'sh_addr' is
the address at which section's first byte should reside in memory, and
'sh_offset' is the byte offset from the beginning of the file to the
first byte in the section.  The perf tool uses below formula to convert
a symbol's memory address to a file address:

  file_address = st_value - sh_addr + sh_offset
                    ^
                    ` Memory address

We can see the final adjusted address ranges for buf1 and buf2 are
[0x30a8-0x30e8) and [0x3068-0x30a8) respectively, apparently this is
incorrect, in the code, the structure for 'buf1' and 'buf2' specifies
compiler attribute with 64-byte alignment.

The problem happens for 'sh_offset', libelf returns it as 0x3028 which
is not 64-byte aligned, combining with disassembly, it's likely libelf
doesn't respect the alignment for .bss section, therefore, it doesn't
return the aligned value for 'sh_offset'.

Suggested by Fangrui Song, ELF file contains program header which
contains PT_LOAD segments, the fields p_vaddr and p_offset in PT_LOAD
segments contain the execution info.  A better choice for converting
memory address to file address is using the formula:

  file_address = st_value - p_vaddr + p_offset

This patch introduces elf_read_program_header() which returns the
program header based on the passed 'st_value', then it uses the formula
above to calculate the symbol file address; and the debugging log is
updated respectively.

After applying the change:

  # ./perf --debug verbose=4 mem report
    ...
    dso__load_sym_internal: adjusting symbol: st_value: 0x40c0 p_vaddr: 0x3d28 p_offset: 0x2d28
    symbol__new: buf2 0x30c0-0x3100
    ...
    dso__load_sym_internal: adjusting symbol: st_value: 0x4080 p_vaddr: 0x3d28 p_offset: 0x2d28
    symbol__new: buf1 0x3080-0x30c0
    ...

Fixes: f17e04afaff84b5c ("perf report: Fix ELF symbol parsing")
Reported-by: Chang Rui <changruinj@gmail.com>
Suggested-by: Fangrui Song <maskray@google.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220724060013.171050-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf scripts python: Let script to be python2 compliant

The mainline kernel can be used for relative old distros, e.g. RHEL 7.
The distro doesn't upgrade from python2 to python3, this causes the
building error that the python script is not python2 compliant.

To fix the building failure, this patch changes from the python f-string
format to traditional string format.

Fixes: 12fdd6c009da0d02 ("perf scripts python: Support Arm CoreSight trace data disassembly")
Reported-by: Akemi Yagi <toracat@elrepo.org>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: ElRepo <contact@elrepo.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220725104220.1106663-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools headers cpufeatures: Sync with the kernel sources

To pick the changes from:

  28a99e95f55c6185 ("x86/amd: Use IBPB for firmware calls")

This only causes these perf files to be rebuilt:

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  CC       /tmp/build/perf/bench/mem-memset-x86-64-asm.o

And addresses this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org
Link: https://lore.kernel.org/lkml/Yt6oWce9UDAmBAtX@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

virtio-net: fix the race between refill work and close

We try using cancel_delayed_work_sync() to prevent the work from
enabling NAPI. This is insufficient since we don't disable the source
of the refill work scheduling. This means an NAPI poll callback after
cancel_delayed_work_sync() can schedule the refill work then can
re-enable the NAPI that leads to use-after-free [1].

Since the work can enable NAPI, we can't simply disable NAPI before
calling cancel_delayed_work_sync(). So fix this by introducing a
dedicated boolean to control whether or not the work could be
scheduled from NAPI.

[1]
==================================================================
BUG: KASAN: use-after-free in refill_work+0x43/0xd4
Read of size 2 at addr ffff88810562c92e by task kworker/2:1/42

CPU: 2 PID: 42 Comm: kworker/2:1 Not tainted 5.19.0-rc1+ #480
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
Workqueue: events refill_work
Call Trace:
<TASK>
dump_stack_lvl+0x34/0x44
print_report.cold+0xbb/0x6ac
? _printk+0xad/0xde
? refill_work+0x43/0xd4
kasan_report+0xa8/0x130
? refill_work+0x43/0xd4
refill_work+0x43/0xd4
process_one_work+0x43d/0x780
worker_thread+0x2a0/0x6f0
? process_one_work+0x780/0x780
kthread+0x167/0x1a0
? kthread_exit+0x50/0x50
ret_from_fork+0x22/0x30
</TASK>
...

Fixes: b2baed69e605c ("virtio_net: set/cancel work on ndo_open/ndo_stop")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

EDAC/ghes: Set the DIMM label unconditionally

The commit

  cb51a371d08e ("EDAC/ghes: Setup DIMM label from DMI and use it in error reports")

enforced that both the bank and device strings passed to
dimm_setup_label() are not NULL.

However, there are BIOSes, for example on a

  HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 03/15/2019

which don't populate both strings:

  Handle 0x0020, DMI type 17, 84 bytes
  Memory Device
          Array Handle: 0x0013
          Error Information Handle: Not Provided
          Total Width: 72 bits
          Data Width: 64 bits
          Size: 32 GB
          Form Factor: DIMM
          Set: None
          Locator: PROC 1 DIMM 1        <===== device
          Bank Locator: Not Specified   <===== bank

This results in a buffer overflow because ghes_edac_register() calls
strlen() on an uninitialized label, which had non-zero values left over
from krealloc_array():

  detected buffer overflow in __fortify_strlen
   ------------[ cut here ]------------
   kernel BUG at lib/string_helpers.c:983!
   invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
   CPU: 1 PID: 1 Comm: swapper/0 Tainted: G          I       5.18.6-200.fc36.x86_64 #1
   Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 03/15/2019
   RIP: 0010:fortify_panic
   ...
   Call Trace:
    <TASK>
    ghes_edac_register.cold
    ghes_probe
    platform_probe
    really_probe
    __driver_probe_device
    driver_probe_device
    __driver_attach
    ? __device_attach_driver
    bus_for_each_dev
    bus_add_driver
    driver_register
    acpi_ghes_init
    acpi_init
    ? acpi_sleep_proc_init
    do_one_initcall

The label contains garbage because the commit in Fixes reallocs the
DIMMs array while scanning the system but doesn't clear the newly
allocated memory.

Change dimm_setup_label() to always initialize the label to fix the
issue. Set it to the empty string in case BIOS does not provide both
bank and device so that ghes_edac_register() can keep the default label
given by edac_mc_alloc_dimms().

  [ bp: Rewrite commit message. ]

Fixes: b9cae27728d1f ("EDAC/ghes: Scan the system once on driver init")
Co-developed-by: Robert Richter <rric@kernel.org>
Signed-off-by: Robert Richter <rric@kernel.org>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Robert Elliott <elliott@hpe.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220719220124.760359-1-toshi.kani@hpe.com

Add Seth Forshee as co-maintainer for idmapped mounts

Seth has been integral in the design and implementation of idmapped
mounts and was the main architect behind the s_user_ns work which
ultimately made filesystems such as FUSE and overlayfs available in
containers. He continues to be active in both development and review.
I'm very happy he decided to maintain this feature. He has my full
trust.

Link: https://lore.kernel.org/r/20220726141615.1046027-1-brauner@kernel.org
Cc: Seth Forshee <sforshee@digitalocean.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

mptcp: Do not return EINPROGRESS when subflow creation succeeds

New subflows are created within the kernel using O_NONBLOCK, so
EINPROGRESS is the expected return value from kernel_connect().
__mptcp_subflow_connect() has the correct logic to consider EINPROGRESS
to be a successful case, but it has also used that error code as its
return value.

Before v5.19 this was benign: all the callers ignored the return
value. Starting in v5.19 there is a MPTCP_PM_CMD_SUBFLOW_CREATE generic
netlink command that does use the return value, so the EINPROGRESS gets
propagated to userspace.

Make __mptcp_subflow_connect() always return 0 on success instead.

Fixes: ec3edaa7ca6c ("mptcp: Add handling of outgoing MP_JOIN requests")
Fixes: 702c2f646d42 ("mptcp: netlink: allow userspace-driven subflow establishment")
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Link: https://lore.kernel.org/r/20220725205231.87529-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge git://git./linux/kernel/git/netfilter/nf

Florian Westphal says:

====================
netfilter updates for net

Three late fixes for netfilter:

1) If nf_queue user requests packet truncation below size of l3 header,
   we corrupt the skb, then crash.  Reject such requests.

2) add cond_resched() calls when doing cycle detection in the
   nf_tables graph.  This avoids softlockup warning with certain
   rulesets.

3) Reject rulesets that use nftables 'queue' expression in family/chain
   combinations other than those that are supported.  Currently the ruleset
   will load, but when userspace attempts to reinject you get WARN splat +
   packet drops.

* git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nft_queue: only allow supported familes and hooks
  netfilter: nf_tables: add rescheduling points during loop detection walks
  netfilter: nf_queue: do not allow packet truncation below transport header offset
====================

Link: https://lore.kernel.org/r/20220726192056.13497-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge tag 'for-net-2022-07-26' of git://git./linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

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

- Fix early wakeup after suspend
- Fix double free on error
- Fix use-after-free on l2cap_chan_put

* tag 'for-net-2022-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put
  Bluetooth: Always set event mask on suspend
  Bluetooth: mgmt: Fix double free on error path
====================

Link: https://lore.kernel.org/r/20220726221328.423714-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge tag 'mm-hotfixes-stable-2022-07-26' of git://git./linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
"Thirteen hotfixes.

  Eight are cc:stable and the remainder are for post-5.18 issues or are
  too minor to warrant backporting"

* tag 'mm-hotfixes-stable-2022-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mailmap: update Gao Xiang's email addresses
  userfaultfd: provide properly masked address for huge-pages
  Revert "ocfs2: mount shared volume without ha stack"
  hugetlb: fix memoryleak in hugetlb_mcopy_atomic_pte
  fs: sendfile handles O_NONBLOCK of out_fd
  ntfs: fix use-after-free in ntfs_ucsncmp()
  secretmem: fix unhandled fault in truncate
  mm/hugetlb: separate path for hwpoison entry in copy_hugetlb_page_range()
  mm: fix missing wake-up event for FSDAX pages
  mm: fix page leak with multiple threads mapping the same page
  mailmap: update Seth Forshee's email address
  tmpfs: fix the issue that the mount and remount results are inconsistent.
  mm: kfence: apply kmemleak_ignore_phys on early allocated pool

scsi: ufs: core: Fix a race condition related to device management

If a device management command completion happens after
wait_for_completion_timeout() times out and before ufshcd_clear_cmds() is
called, then the completion code may crash on the complete() call in
__ufshcd_transfer_req_compl().

Fix the following crash:

  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
  Call trace:
   complete+0x64/0x178
   __ufshcd_transfer_req_compl+0x30c/0x9c0
   ufshcd_poll+0xf0/0x208
   ufshcd_sl_intr+0xb8/0xf0
   ufshcd_intr+0x168/0x2f4
   __handle_irq_event_percpu+0xa0/0x30c
   handle_irq_event+0x84/0x178
   handle_fasteoi_irq+0x150/0x2e8
   __handle_domain_irq+0x114/0x1e4
   gic_handle_irq.31846+0x58/0x300
   el1_irq+0xe4/0x1c0
   efi_header_end+0x110/0x680
   __irq_exit_rcu+0x108/0x124
   __handle_domain_irq+0x118/0x1e4
   gic_handle_irq.31846+0x58/0x300
   el1_irq+0xe4/0x1c0
   cpuidle_enter_state+0x3ac/0x8c4
   do_idle+0x2fc/0x55c
   cpu_startup_entry+0x84/0x90
   kernel_init+0x0/0x310
   start_kernel+0x0/0x608
   start_kernel+0x4ec/0x608

Link: https://lore.kernel.org/r/20220720170228.1598842-1-bvanassche@acm.org
Fixes: 5a0b0cb9bee7 ("[SCSI] ufs: Add support for sending NOP OUT UPIU")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: Fix warning in scsi_alloc_sgtables()

As explained in SG_IO howto[1]:

"If iovec_count is non-zero then 'dxfer_len' should be equal to the sum of
iov_len lengths. If not, the minimum of the two is the transfer length."

When iovec_count is non-zero and dxfer_len is zero, the sg_io() just
genarated a null bio, and finally caused a warning below. To fix it, skip
generating a bio for this request if dxfer_len is zero.

[1] https://tldp.org/HOWTO/SCSI-Generic-HOWTO/x198.html

WARNING: CPU: 2 PID: 3643 at drivers/scsi/scsi_lib.c:1032 scsi_alloc_sgtables+0xc7d/0xf70 drivers/scsi/scsi_lib.c:1032
Modules linked in:

CPU: 2 PID: 3643 Comm: syz-executor397 Not tainted
5.17.0-rc3-syzkaller-00316-gb81b1829e7e3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-204/01/2014
RIP: 0010:scsi_alloc_sgtables+0xc7d/0xf70 drivers/scsi/scsi_lib.c:1032
Code: e7 fc 31 ff 44 89 f6 e8 c1 4e e7 fc 45 85 f6 0f 84 1a f5 ff ff e8
93 4c e7 fc 83 c5 01 0f b7 ed e9 0f f5 ff ff e8 83 4c e7 fc <0f> 0b 41
   bc 0a 00 00 00 e9 2b fb ff ff 41 bc 09 00 00 00 e9 20 fb
RSP: 0018:ffffc90000d07558 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88801bfc96a0 RCX: 0000000000000000
RDX: ffff88801c876000 RSI: ffffffff849060bd RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff849055b9 R11: 0000000000000000 R12: ffff888012b8c000
R13: ffff88801bfc9580 R14: 0000000000000000 R15: ffff88801432c000
FS:  00007effdec8e700(0000) GS:ffff88802cc00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007effdec6d718 CR3: 00000000206d6000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
scsi_setup_scsi_cmnd drivers/scsi/scsi_lib.c:1219 [inline]
scsi_prepare_cmd drivers/scsi/scsi_lib.c:1614 [inline]
scsi_queue_rq+0x283e/0x3630 drivers/scsi/scsi_lib.c:1730
blk_mq_dispatch_rq_list+0x6ea/0x22e0 block/blk-mq.c:1851
__blk_mq_sched_dispatch_requests+0x20b/0x410 block/blk-mq-sched.c:299
blk_mq_sched_dispatch_requests+0xfb/0x180 block/blk-mq-sched.c:332
__blk_mq_run_hw_queue+0xf9/0x350 block/blk-mq.c:1968
__blk_mq_delay_run_hw_queue+0x5b6/0x6c0 block/blk-mq.c:2045
blk_mq_run_hw_queue+0x30f/0x480 block/blk-mq.c:2096
blk_mq_sched_insert_request+0x340/0x440 block/blk-mq-sched.c:451
blk_execute_rq+0xcc/0x340 block/blk-mq.c:1231
sg_io+0x67c/0x1210 drivers/scsi/scsi_ioctl.c:485
scsi_ioctl_sg_io drivers/scsi/scsi_ioctl.c:866 [inline]
scsi_ioctl+0xa66/0x1560 drivers/scsi/scsi_ioctl.c:921
sd_ioctl+0x199/0x2a0 drivers/scsi/sd.c:1576
blkdev_ioctl+0x37a/0x800 block/ioctl.c:588
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7effdecdc5d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 48 89 f8 48 89
f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007effdec8e2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007effded664c0 RCX: 00007effdecdc5d9
RDX: 0000000020002300 RSI: 0000000000002285 RDI: 0000000000000004
RBP: 00007effded34034 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007effded34054 R14: 2f30656c69662f2e R15: 00007effded664c8

Link: https://lore.kernel.org/r/20220720025120.3226770-1-yanaijie@huawei.com
Fixes: 25636e282fe9 ("block: fix SG_IO vector request data length handling")
Reported-by: syzbot+d44b35ecfb807e5af0b5@syzkaller.appspotmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: host: Hold reference returned by of_parse_phandle()

In ufshcd_populate_vreg(), we should hold the reference returned by
of_parse_phandle() and then use it to call of_node_put() for refcount
balance.

Link: https://lore.kernel.org/r/20220719071529.1081166-1-windhl@126.com
Fixes: aa4976130934 ("ufs: Add regulator enable support")
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mpt3sas: Stop fw fault watchdog work item during system shutdown

During system shutdown or reboot, mpt3sas will reset the firmware back to
ready state. However, the driver leaves running a watchdog work item
intended to keep the firmware in operational state. This causes a second,
unneeded reset on shutdown and moves the firmware back to operational
instead of in ready state as intended. And if the mpt3sas_fwfault_debug
module parameter is set, this extra reset also panics the system.

mpt3sas's scsih_shutdown needs to stop the watchdog before resetting the
firmware back to ready state.

Link: https://lore.kernel.org/r/20220722142448.6289-1-djeffery@redhat.com
Fixes: fae21608c31c ("scsi: mpt3sas: Transition IOC to Ready state during shutdown")
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

mailmap: update Gao Xiang's email addresses

I've been in Alibaba Cloud for more than one year, mainly to address
cloud-native challenges (such as high-performance container images) for
open source communities.

Update my email addresses on behalf of my current employer (Alibaba Cloud)
to support all my (team) work in this area. Also add an outdated
@redhat.com address of me.

Link: https://lkml.kernel.org/r/20220719154246.62970-1-xiang@kernel.org
Signed-off-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

userfaultfd: provide properly masked address for huge-pages

Commit 824ddc601adc ("userfaultfd: provide unmasked address on
page-fault") was introduced to fix an old bug, in which the offset in the
address of a page-fault was masked.  Concerns were raised - although were
never backed by actual code - that some userspace code might break because
the bug has been around for quite a while.  To address these concerns a
new flag was introduced, and only when this flag is set by the user,
userfaultfd provides the exact address of the page-fault.

The commit however had a bug, and if the flag is unset, the offset was
always masked based on a base-page granularity.  Yet, for huge-pages, the
behavior prior to the commit was that the address is masked to the
huge-page granulrity.

While there are no reports on real breakage, fix this issue.  If the flag
is unset, use the address with the masking that was done before.

Link: https://lkml.kernel.org/r/20220711165906.2682-1-namit@vmware.com
Fixes: 824ddc601adc ("userfaultfd: provide unmasked address on page-fault")
Signed-off-by: Nadav Amit <namit@vmware.com>
Reported-by: James Houghton <jthoughton@google.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: James Houghton <jthoughton@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put

This fixes the following trace which is caused by hci_rx_work starting up
*after* the final channel reference has been put() during sock_close() but
*before* the references to the channel have been destroyed, so instead
the code now rely on kref_get_unless_zero/l2cap_chan_hold_unless_zero to
prevent referencing a channel that is about to be destroyed.

  refcount_t: increment on 0; use-after-free.
  BUG: KASAN: use-after-free in refcount_dec_and_test+0x20/0xd0
  Read of size 4 at addr ffffffc114f5bf18 by task kworker/u17:14/705

  CPU: 4 PID: 705 Comm: kworker/u17:14 Tainted: G S      W
  4.14.234-00003-g1fb6d0bd49a4-dirty #28
  Hardware name: Qualcomm Technologies, Inc. SM8150 V2 PM8150
  Google Inc. MSM sm8150 Flame DVT (DT)
  Workqueue: hci0 hci_rx_work
  Call trace:
   dump_backtrace+0x0/0x378
   show_stack+0x20/0x2c
   dump_stack+0x124/0x148
   print_address_description+0x80/0x2e8
   __kasan_report+0x168/0x188
   kasan_report+0x10/0x18
   __asan_load4+0x84/0x8c
   refcount_dec_and_test+0x20/0xd0
   l2cap_chan_put+0x48/0x12c
   l2cap_recv_frame+0x4770/0x6550
   l2cap_recv_acldata+0x44c/0x7a4
   hci_acldata_packet+0x100/0x188
   hci_rx_work+0x178/0x23c
   process_one_work+0x35c/0x95c
   worker_thread+0x4cc/0x960
   kthread+0x1a8/0x1c4
   ret_from_fork+0x10/0x18

Cc: stable@kernel.org
Reported-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Tested-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Bluetooth: Always set event mask on suspend

When suspending, always set the event mask once disconnects are
successful. Otherwise, if wakeup is disallowed, the event mask is not
set before suspend continues and can result in an early wakeup.

Fixes: 182ee45da083 ("Bluetooth: hci_sync: Rework hci_suspend_notifier")
Cc: stable@vger.kernel.org
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Bluetooth: mgmt: Fix double free on error path

Don't call mgmt_pending_remove() twice (double free).

Fixes: 6b88eff43704 ("Bluetooth: hci_sync: Refactor remove Adv Monitor")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

wifi: mac80211: do not abuse fq.lock in ieee80211_do_stop()

lockdep complains use of uninitialized spinlock at ieee80211_do_stop() [1],
for commit f856373e2f31ffd3 ("wifi: mac80211: do not wake queues on a vif
that is being stopped") guards clear_bit() using fq.lock even before
fq_init() from ieee80211_txq_setup_flows() initializes this spinlock.

According to discussion [2], Toke was not happy with expanding usage of
fq.lock. Since __ieee80211_wake_txqs() is called under RCU read lock, we
can instead use synchronize_rcu() for flushing ieee80211_wake_txqs().

Link: https://syzkaller.appspot.com/bug?extid=eceab52db7c4b961e9d6
Link: https://lkml.kernel.org/r/874k0zowh2.fsf@toke.dk
Reported-by: syzbot <syzbot+eceab52db7c4b961e9d6@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: f856373e2f31ffd3 ("wifi: mac80211: do not wake queues on a vif that is being stopped")
Tested-by: syzbot <syzbot+eceab52db7c4b961e9d6@syzkaller.appspotmail.com>
Acked-by: Toke Høiland-Jørgensen <toke@kernel.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/9cc9b81d-75a3-3925-b612-9d0ad3cab82b@I-love.SAKURA.ne.jp
[ pick up commit 3598cb6e1862 ("wifi: mac80211: do not abuse fq.lock in ieee80211_do_stop()") from -next]
Link: https://lore.kernel.org/all/87o7xcq6qt.fsf@kernel.org/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

ice: do not setup vlan for loopback VSI

Currently loopback test is failiing due to the error returned from
ice_vsi_vlan_setup(). Skip calling it when preparing loopback VSI.

Fixes: 0e674aeb0b77 ("ice: Add handler for ethtool selftest")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

ice: check (DD | EOF) bits on Rx descriptor rather than (EOP | RS)

Tx side sets EOP and RS bits on descriptors to indicate that a
particular descriptor is the last one and needs to generate an irq when
it was sent. These bits should not be checked on completion path
regardless whether it's the Tx or the Rx. DD bit serves this purpose and
it indicates that a particular descriptor is either for Rx or was
successfully Txed. EOF is also set as loopback test does not xmit
fragmented frames.

Look at (DD | EOF) bits setting in ice_lbtest_receive_frames() instead
of EOP and RS pair.

Fixes: 0e674aeb0b77 ("ice: Add handler for ethtool selftest")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>