Merge tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull hotfixes from Andrew Morton:
 "16 hotfixes. Six are cc:stable and the remainder address post-6.4
  issues"

The merge undoes the disabling of the CONFIG_PER_VMA_LOCK feature, since
it was all hopefully fixed in mainline.

* tag 'mm-hotfixes-stable-2023-07-08-10-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  lib: dhry: fix sleeping allocations inside non-preemptable section
  kasan, slub: fix HW_TAGS zeroing with slub_debug
  kasan: fix type cast in memory_is_poisoned_n
  mailmap: add entries for Heiko Stuebner
  mailmap: update manpage link
  bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page
  MAINTAINERS: add linux-next info
  mailmap: add Markus Schneider-Pargmann
  writeback: account the number of pages written back
  mm: call arch_swap_restore() from do_swap_page()
  squashfs: fix cache race with migration
  mm/hugetlb.c: fix a bug within a BUG(): inconsistent pte comparison
  docs: update ocfs2-devel mailing list address
  MAINTAINERS: update ocfs2-devel mailing list address
  mm: disable CONFIG_PER_VMA_LOCK until its fixed
  fork: lock VMAs of the parent process when forking

When forking a child process, the parent write-protects anonymous pages
and COW-shares them with the child being forked using copy_present_pte().

We must not take any concurrent page faults on the source vma's as they
are being processed, as we expect both the vma and the pte's behind it
to be stable.  For example, the anon_vma_fork() expects the parents
vma->anon_vma to not change during the vma copy.

A concurrent page fault on a page newly marked read-only by the page
copy might trigger wp_page_copy() and a anon_vma_prepare(vma) on the
source vma, defeating the anon_vma_clone() that wasn't done because the
parent vma originally didn't have an anon_vma, but we now might end up
copying a pte entry for a page that has one.

Before the per-vma lock based changes, the mmap_lock guaranteed
exclusion with concurrent page faults.  But now we need to do a
vma_start_write() to make sure no concurrent faults happen on this vma
while it is being processed.

This fix can potentially regress some fork-heavy workloads.  Kernel
build time did not show noticeable regression on a 56-core machine while
a stress test mapping 10000 VMAs and forking 5000 times in a tight loop
shows ~5% regression.  If such fork time regression is unacceptable,
disabling CONFIG_PER_VMA_LOCK should restore its performance.  Further
optimizations are possible if this regression proves to be problematic.
Suggested-by: David Hildenbrand <david@redhat.com>
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Closes: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@applied-asynchrony.com/Reported-by: Jacob Young <jacobly.alt@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624
Fixes: 0bff0aae ("x86/mm: try VMA lock-based page fault handling first")
Cc: stable@vger.kernel.org
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mmap_region adds a newly created VMA into VMA tree and might modify it
afterwards before dropping the mmap_lock.  This poses a problem for page
faults handled under per-VMA locks because they don't take the mmap_lock
and can stumble on this VMA while it's still being modified.  Currently
this does not pose a problem since post-addition modifications are done
only for file-backed VMAs, which are not handled under per-VMA lock.
However, once support for handling file-backed page faults with per-VMA
locks is added, this will become a race.

Fix this by write-locking the VMA before inserting it into the VMA tree.
Other places where a new VMA is added into VMA tree do not modify it
after the insertion, so do not need the same locking.

Cc: stable@vger.kernel.org
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

With recent changes necessitating mmap_lock to be held for write while
expanding a stack, per-VMA locks should follow the same rules and be
write-locked to prevent page faults into the VMA being expanded. Add
the necessary locking.

Cc: stable@vger.kernel.org
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull more SCSI updates from James Bottomley:
 "A few late arriving patches that missed the initial pull request. It's
  mostly bug fixes (the dt-bindings is a fix for the initial pull)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Remove unused function declaration
  scsi: target: docs: Remove tcm_mod_builder.py
  scsi: target: iblock: Quiet bool conversion warning with pr_preempt use
  scsi: dt-bindings: ufs: qcom: Fix ICE phandle
  scsi: core: Simplify scsi_cdl_check_cmd()
  scsi: isci: Fix comment typo
  scsi: smartpqi: Replace one-element arrays with flexible-array members
  scsi: target: tcmu: Replace strlcpy() with strscpy()
  scsi: ncr53c8xx: Replace strlcpy() with strscpy()
  scsi: lpfc: Fix lpfc_name struct packing

Pull more i2c updates from Wolfram Sang:

 - xiic patch should have been in the original pull but slipped through

 - mpc patch fixes a build regression

 - nomadik cleanup

* tag 'i2c-for-6.5-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mpc: Drop unused variable
  i2c: nomadik: Remove a useless call in the remove function
  i2c: xiic: Don't try to handle more interrupt events after error

Pull hardening fixes from Kees Cook:

 - Check for NULL bdev in LoadPin (Matthias Kaehlcke)

 - Revert unwanted KUnit FORTIFY build default

 - Fix 1-element array causing boot warnings with xhci-hub

* tag 'hardening-v6.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  usb: ch9: Replace bmSublinkSpeedAttr 1-element array with flexible array
  Revert "fortify: Allow KUnit test to build without FORTIFY"
  dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter

Merge tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next

Pull more perf tools updates from Namhyung Kim:
 "These are remaining changes and fixes for this cycle.

  Build:

   - Allow generating vmlinux.h from BTF using `make GEN_VMLINUX_H=1`
     and skip if the vmlinux has no BTF.

   - Replace deprecated clang -target xxx option by --target=xxx.

  perf record:

   - Print event attributes with well known type and config symbols in
     the debug output like below:

       # perf record -e cycles,cpu-clock -C0 -vv true
       <SNIP>
       ------------------------------------------------------------
       perf_event_attr:
         type                             0 (PERF_TYPE_HARDWARE)
         size                             136
         config                           0 (PERF_COUNT_HW_CPU_CYCLES)
         { sample_period, sample_freq }   4000
         sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
         read_format                      ID
         disabled                         1
         inherit                          1
         freq                             1
         sample_id_all                    1
         exclude_guest                    1
       ------------------------------------------------------------
       sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 5
       ------------------------------------------------------------
       perf_event_attr:
         type                             1 (PERF_TYPE_SOFTWARE)
         size                             136
         config                           0 (PERF_COUNT_SW_CPU_CLOCK)
         { sample_period, sample_freq }   4000
         sample_type                      IP|TID|TIME|CPU|PERIOD|IDENTIFIER
         read_format                      ID
         disabled                         1
         inherit                          1
         freq                             1
         sample_id_all                    1
         exclude_guest                    1

   - Update AMD IBS event error message since it now support per-process
     profiling but no priviledge filters.

       $ sudo perf record -e ibs_op//k -C 0
       Error:
       AMD IBS doesn't support privilege filtering. Try again without
       the privilege modifiers (like 'k') at the end.

  perf lock contention:

   - Support CSV style output using -x option

       $ sudo perf lock con -ab -x, sleep 1
       # output: contended, total wait, max wait, avg wait, type, caller
       19, 194232, 21415, 10222, spinlock, process_one_work+0x1f0
       15, 162748, 23843, 10849, rwsem:R, do_user_addr_fault+0x40e
       4, 86740, 23415, 21685, rwlock:R, ep_poll_callback+0x2d
       1, 84281, 84281, 84281, mutex, iwl_mvm_async_handlers_wk+0x135
       8, 67608, 27404, 8451, spinlock, __queue_work+0x174
       3, 58616, 31125, 19538, rwsem:W, do_mprotect_pkey+0xff
       3, 52953, 21172, 17651, rwlock:W, do_epoll_wait+0x248
       2, 30324, 19704, 15162, rwsem:R, do_madvise+0x3ad
       1, 24619, 24619, 24619, spinlock, rcu_core+0xd4

   - Add --output option to save the data to a file not to be interfered
     by other debug messages.

  Test:

   - Fix event parsing test on ARM where there's no raw PMU nor supports
     PERF_PMU_CAP_EXTENDED_HW_TYPE.

   - Update the lock contention test case for CSV output.

   - Fix a segfault in the daemon command test.

  Vendor events (JSON):

   - Add has_event() to check if the given event is available on system
     at runtime. On Intel machines, some transaction events may not be
     present when TSC extensions are disabled.

   - Update Intel event metrics.

  Misc:

   - Sort symbols by name using an external array of pointers instead of
     a rbtree node in the symbol. This will save 16-bytes or 24-bytes
     per symbol whether the sorting is actually requested or not.

   - Fix unwinding DWARF callstacks using libdw when --symfs option is
     used"

* tag 'perf-tools-for-v6.5-2-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next: (38 commits)
  perf test: Fix event parsing test when PERF_PMU_CAP_EXTENDED_HW_TYPE isn't supported.
  perf test: Fix event parsing test on Arm
  perf evsel amd: Fix IBS error message
  perf: unwind: Fix symfs with libdw
  perf symbol: Fix uninitialized return value in symbols__find_by_name()
  perf test: Test perf lock contention CSV output
  perf lock contention: Add --output option
  perf lock contention: Add -x option for CSV style output
  perf lock: Remove stale comments
  perf vendor events intel: Update tigerlake to 1.13
  perf vendor events intel: Update skylakex to 1.31
  perf vendor events intel: Update skylake to 57
  perf vendor events intel: Update sapphirerapids to 1.14
  perf vendor events intel: Update icelakex to 1.21
  perf vendor events intel: Update icelake to 1.19
  perf vendor events intel: Update cascadelakex to 1.19
  perf vendor events intel: Update meteorlake to 1.03
  perf vendor events intel: Add rocketlake events/metrics
  perf vendor metrics intel: Make transaction metrics conditional
  perf jevents: Support for has_event function
  ...

Pull bitmap updates from Yury Norov:
 "Fixes for different bitmap pieces:

   - lib/test_bitmap: increment failure counter properly

     The tests that don't use expect_eq() macro to determine that a test
     is failured must increment failed_tests explicitly.

   - lib/bitmap: drop optimization of bitmap_{from,to}_arr64

     bitmap_{from,to}_arr64() optimization is overly optimistic
     on 32-bit LE architectures when it's wired to
     bitmap_copy_clear_tail().

   - nodemask: Drop duplicate check in for_each_node_mask()

     As the return value type of first_node() became unsigned, the node
     >= 0 became unnecessary.

   - cpumask: fix function description kernel-doc notation

   - MAINTAINERS: Add bits.h and bitfield.h to the BITMAP API record

     Add linux/bits.h and linux/bitfield.h for visibility"

* tag 'bitmap-6.5-rc1' of https://github.com/norov/linux:
  MAINTAINERS: Add bitfield.h to the BITMAP API record
  MAINTAINERS: Add bits.h to the BITMAP API record
  cpumask: fix function description kernel-doc notation
  nodemask: Drop duplicate check in for_each_node_mask()
  lib/bitmap: drop optimization of bitmap_{from,to}_arr64
  lib/test_bitmap: increment failure counter properly

The Smatch static checker reports the following warnings:

    lib/dhry_run.c:38 dhry_benchmark() warn: sleeping in atomic context
    lib/dhry_run.c:43 dhry_benchmark() warn: sleeping in atomic context

Indeed, dhry() does sleeping allocations inside the non-preemptable
section delimited by get_cpu()/put_cpu().

Fix this by using atomic allocations instead.
Add error handling, as atomic these allocations may fail.

Link: https://lkml.kernel.org/r/bac6d517818a7cd8efe217c1ad649fffab9cc371.1688568764.git.geert+renesas@glider.be
Fixes: 13684e96 ("lib: dhry: fix unstable smp_processor_id(_) usage")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/0469eb3a-02eb-4b41-b189-de20b931fa56@moroto.mountainSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Commit 946fa0db ("mm/slub: extend redzone check to extra allocated
kmalloc space than requested") added precise kmalloc redzone poisoning to
the slub_debug functionality.

However, this commit didn't account for HW_TAGS KASAN fully initializing
the object via its built-in memory initialization feature.  Even though
HW_TAGS KASAN memory initialization contains special memory initialization
handling for when slub_debug is enabled, it does not account for in-object
slub_debug redzones.  As a result, HW_TAGS KASAN can overwrite these
redzones and cause false-positive slub_debug reports.

To fix the issue, avoid HW_TAGS KASAN memory initialization when
slub_debug is enabled altogether.  Implement this by moving the
__slub_debug_enabled check to slab_post_alloc_hook.  Common slab code
seems like a more appropriate place for a slub_debug check anyway.

Link: https://lkml.kernel.org/r/678ac92ab790dba9198f9ca14f405651b97c8502.1688561016.git.andreyknvl@google.com
Fixes: 946fa0db ("mm/slub: extend redzone check to extra allocated kmalloc space than requested")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reported-by: Will Deacon <will@kernel.org>
Acked-by: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: kasan-dev@googlegroups.com
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Commit bb6e04a1 ("kasan: use internal prototypes matching gcc-13
builtins") introduced a bug into the memory_is_poisoned_n implementation:
it effectively removed the cast to a signed integer type after applying
KASAN_GRANULE_MASK.

As a result, KASAN started failing to properly check memset, memcpy, and
other similar functions.

Fix the bug by adding the cast back (through an additional signed integer
variable to make the code more readable).

Link: https://lkml.kernel.org/r/8c9e0251c2b8b81016255709d4ec42942dcaf018.1688431866.git.andreyknvl@google.com
Fixes: bb6e04a1 ("kasan: use internal prototypes matching gcc-13 builtins")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

I am going to lose my vrull.eu address at the end of july, and while
adding it to mailmap I also realised that there are more old addresses
from me dangling, so update .mailmap for all of them.

Link: https://lkml.kernel.org/r/20230704163919.1136784-3-heiko@sntech.deSigned-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Patch series "Update .mailmap for my work address and fix manpage".

While updating mailmap for the going-away address, I also found that on
current systems the manpage linked from the header comment changed.

And in fact it looks like the git mailmap feature got its own manpage.


This patch (of 2):

On recent systems the git-shortlog manpage only tells people to
    See gitmailmap(5)

So instead of sending people on a scavenger hunt, put that info into the
header directly.  Though keep the old reference around for older systems.

Link: https://lkml.kernel.org/r/20230704163919.1136784-1-heiko@sntech.de
Link: https://lkml.kernel.org/r/20230704163919.1136784-2-heiko@sntech.deSigned-off-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

commit dd0ff4d1 ("bootmem: remove the vmemmap pages from kmemleak in
put_page_bootmem") fix an overlaps existing problem of kmemleak.  But the
problem still existed when HAVE_BOOTMEM_INFO_NODE is disabled, because in
this case, free_bootmem_page() will call free_reserved_page() directly.

Fix the problem by adding kmemleak_free_part() in free_bootmem_page() when
HAVE_BOOTMEM_INFO_NODE is disabled.

Link: https://lkml.kernel.org/r/20230704101942.2819426-1-liushixin2@huawei.com
Fixes: f41f2ed4 ("mm: hugetlb: free the vmemmap pages associated with each HugeTLB page")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Add linux-next info to MAINTAINERS for ease of finding this data.

Link: https://lkml.kernel.org/r/20230704054410.12527-1-rdunlap@infradead.orgSigned-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Add my old mail address and update my name.

Link: https://lkml.kernel.org/r/20230628081341.3470229-1-msp@baylibre.comSigned-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

nr_to_write is a count of pages, so we need to decrease it by the number
of pages in the folio we just wrote, not by 1.  Most callers specify
either LONG_MAX or 1, so are unaffected, but writeback_sb_inodes() might
end up writing 512x as many pages as it asked for.

Dave added:

: XFS is the only filesystem this would affect, right?  AFAIA, nothing
: else enables large folios and uses writeback through
: write_cache_pages() at this point...
: 
: In which case, I'd be surprised if much difference, if any, gets
: noticed by anyone.

Link: https://lkml.kernel.org/r/20230628185548.981888-1-willy@infradead.org
Fixes: 793917d9 ("mm/readahead: Add large folio readahead")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Commit c145e0b4 ("mm: streamline COW logic in do_swap_page()") moved
the call to swap_free() before the call to set_pte_at(), which meant that
the MTE tags could end up being freed before set_pte_at() had a chance to
restore them.  Fix it by adding a call to the arch_swap_restore() hook
before the call to swap_free().

Link: https://lkml.kernel.org/r/20230523004312.1807357-2-pcc@google.com
Link: https://linux-review.googlesource.com/id/I6470efa669e8bd2f841049b8c61020c510678965
Fixes: c145e0b4 ("mm: streamline COW logic in do_swap_page()")
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reported-by: Qun-wei Lin <Qun-wei.Lin@mediatek.com>
Closes: https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>	[6.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Migration replaces the page in the mapping before copying the contents and
the flags over from the old page, so check that the page in the page cache
is really up to date before using it.  Without this, stressing squashfs
reads with parallel compaction sometimes results in squashfs reporting
data corruption.

Link: https://lkml.kernel.org/r/20230629-squashfs-cache-migration-v1-1-d50ebe55099d@axis.com
Fixes: e994f5b6 ("squashfs: cache partial compressed blocks")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The following crash happens for me when running the -mm selftests (below).
Specifically, it happens while running the uffd-stress subtests:

kernel BUG at mm/hugetlb.c:7249!
invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 3238 Comm: uffd-stress Not tainted 6.4.0-hubbard-github+ #109
Hardware name: ASUS X299-A/PRIME X299-A, BIOS 1503 08/03/2018
RIP: 0010:huge_pte_alloc+0x12c/0x1a0
...
Call Trace:
 <TASK>
 ? __die_body+0x63/0xb0
 ? die+0x9f/0xc0
 ? do_trap+0xab/0x180
 ? huge_pte_alloc+0x12c/0x1a0
 ? do_error_trap+0xc6/0x110
 ? huge_pte_alloc+0x12c/0x1a0
 ? handle_invalid_op+0x2c/0x40
 ? huge_pte_alloc+0x12c/0x1a0
 ? exc_invalid_op+0x33/0x50
 ? asm_exc_invalid_op+0x16/0x20
 ? __pfx_put_prev_task_idle+0x10/0x10
 ? huge_pte_alloc+0x12c/0x1a0
 hugetlb_fault+0x1a3/0x1120
 ? finish_task_switch+0xb3/0x2a0
 ? lock_is_held_type+0xdb/0x150
 handle_mm_fault+0xb8a/0xd40
 ? find_vma+0x5d/0xa0
 do_user_addr_fault+0x257/0x5d0
 exc_page_fault+0x7b/0x1f0
 asm_exc_page_fault+0x22/0x30

That happens because a BUG() statement in huge_pte_alloc() attempts to
check that a pte, if present, is a hugetlb pte, but it does so in a
non-lockless-safe manner that leads to a false BUG() report.

We got here due to a couple of bugs, each of which by itself was not quite
enough to cause a problem:

First of all, before commit c33c7948("mm: ptep_get() conversion"), the
BUG() statement in huge_pte_alloc() was itself fragile: it relied upon
compiler behavior to only read the pte once, despite using it twice in the
same conditional.

Next, commit c33c7948 ("mm: ptep_get() conversion") broke that
delicate situation, by causing all direct pte reads to be done via
READ_ONCE().  And so READ_ONCE() got called twice within the same BUG()
conditional, leading to comparing (potentially, occasionally) different
versions of the pte, and thus to false BUG() reports.

Fix this by taking a single snapshot of the pte before using it in the
BUG conditional.

Now, that commit is only partially to blame here but, people doing
bisections will invariably land there, so this will help them find a fix
for a real crash.  And also, the previous behavior was unlikely to ever
expose this bug--it was fragile, yet not actually broken.

So that's why I chose this commit for the Fixes tag, rather than the
commit that created the original BUG() statement.

Link: https://lkml.kernel.org/r/20230701010442.2041858-1-jhubbard@nvidia.com
Fixes: c33c7948 ("mm: ptep_get() conversion")
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: James Houghton <jthoughton@google.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The ocfs2-devel mailing list has been migrated to the kernel.org
infrastructure, update all related documentation pointers to reflect the
change.

Link: https://lkml.kernel.org/r/20230628013437.47030-3-ailiop@suse.comSigned-off-by: Anthony Iliopoulos <ailiop@suse.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The ocfs2-devel mailing list has been migrated to the kernel.org
infrastructure, update the related entry to reflect the change.

Link: https://lkml.kernel.org/r/20230628013437.47030-2-ailiop@suse.comSigned-off-by: Anthony Iliopoulos <ailiop@suse.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

A memory corruption was reported in [1] with bisection pointing to the
patch [2] enabling per-VMA locks for x86.  Disable per-VMA locks config to
prevent this issue until the fix is confirmed.  This is expected to be a
temporary measure.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=217624
[2] https://lore.kernel.org/all/20230227173632.3292573-30-surenb@google.com

Link: https://lkml.kernel.org/r/20230706011400.2949242-3-surenb@google.comReported-by: Jiri Slaby <jirislaby@kernel.org>
Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/Reported-by: Jacob Young <jacobly.alt@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217624
Fixes: 0bff0aae ("x86/mm: try VMA lock-based page fault handling first")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Holger Hoffstätte <holger@applied-asynchrony.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Patch series "Avoid memory corruption caused by per-VMA locks", v4.

A memory corruption was reported in [1] with bisection pointing to the
patch [2] enabling per-VMA locks for x86.  Based on the reproducer
provided in [1] we suspect this is caused by the lack of VMA locking while
forking a child process.

Patch 1/2 in the series implements proper VMA locking during fork.  I
tested the fix locally using the reproducer and was unable to reproduce
the memory corruption problem.

This fix can potentially regress some fork-heavy workloads.  Kernel build
time did not show noticeable regression on a 56-core machine while a
stress test mapping 10000 VMAs and forking 5000 times in a tight loop
shows ~7% regression.  If such fork time regression is unacceptable,
disabling CONFIG_PER_VMA_LOCK should restore its performance.  Further
optimizations are possible if this regression proves to be problematic.

Patch 2/2 disables per-VMA locks until the fix is tested and verified.


This patch (of 2):

When forking a child process, parent write-protects an anonymous page and
COW-shares it with the child being forked using copy_present_pte(). 
Parent's TLB is flushed right before we drop the parent's mmap_lock in
dup_mmap().  If we get a write-fault before that TLB flush in the parent,
and we end up replacing that anonymous page in the parent process in
do_wp_page() (because, COW-shared with the child), this might lead to some
stale writable TLB entries targeting the wrong (old) page.  Similar issue
happened in the past with userfaultfd (see flush_tlb_page() call inside
do_wp_page()).

Lock VMAs of the parent process when forking a child, which prevents
concurrent page faults during fork operation and avoids this issue.  This
fix can potentially regress some fork-heavy workloads.  Kernel build time
did not show noticeable regression on a 56-core machine while a stress
test mapping 10000 VMAs and forking 5000 times in a tight loop shows ~7%
regression.  If such fork time regression is unacceptable, disabling
CONFIG_PER_VMA_LOCK should restore its performance.  Further optimizations
are possible if this regression proves to be problematic.

Link: https://lkml.kernel.org/r/20230706011400.2949242-1-surenb@google.com
Link: https://lkml.kernel.org/r/20230706011400.2949242-2-surenb@google.com
Fixes: 0bff0aae ("x86/mm: try VMA lock-based page fault handling first")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: David Hildenbrand <david@redhat.com>
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Closes: https://lore.kernel.org/all/dbdef34c-3a07-5951-e1ae-e9c6e3cdf51b@kernel.org/Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Closes: https://lore.kernel.org/all/b198d649-f4bf-b971-31d0-e8433ec2a34c@applied-asynchrony.com/Reported-by: Jacob Young <jacobly.alt@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=3D217624Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Tested-by: Holger Hoffsttte <holger@applied-asynchrony.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Pull mmc fix from Ulf Hansson:

 - Fix regression of detection of eMMC/SD/SDIO cards

* tag 'mmc-v6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: Revert "mmc: core: Allow mmc_start_host() synchronously detect a card"

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes that have been gathered recently:

   - Two code-typo fixes in the new UMP core

   - A fix in jack reporting to avoid the usage of mutex

   - A potential data race fix in HD-audio core regmap code

   - A potential data race fix in PCM allocation helper code

   - HD-audio quirks for ASUS, Clevo and Unis machines

   - Constifications in FireWire drivers"

* tag 'sound-fix-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: Add quirk for ASUS ROG GZ301V
  ALSA: jack: Fix mutex call in snd_jack_report()
  ALSA: seq: ump: fix typo in system_2p_ev_to_ump_midi1()
  ALSA: hda/realtek: Whitespace fix
  ALSA: hda/realtek: Add quirk for ASUS ROG G614Jx
  ALSA: hda/realtek: Amend G634 quirk to enable rear speakers
  ALSA: hda/realtek: Add quirk for ASUS ROG GA402X
  ALSA: hda/realtek: Add quirk for ASUS ROG GX650P
  ALSA: pcm: Fix potential data race at PCM memory allocation helpers
  ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()
  ALSA: hda/realtek: Add quirks for Unis H3C Desktop B760 & Q760
  ALSA: hda/realtek: Add quirk for Clevo NPx0SNx
  ALSA: ump: Correct wrong byte size at converting a UMP System message
  ALSA: fireface: make read-only const array for model names static
  ALSA: oxfw: make read-only const array models static

Pull ceph updates from Ilya Dryomov:
 "A bunch of CephFS fixups from Xiubo, mostly around dropping caps,
  along with a fix for a regression in the readahead handling code which
  sneaked in with the switch to netfs helpers"

* tag 'ceph-for-6.5-rc1' of https://github.com/ceph/ceph-client:
  ceph: don't let check_caps skip sending responses for revoke msgs
  ceph: issue a cap release immediately if no cap exists
  ceph: trigger to flush the buffer when making snapshot
  ceph: fix blindly expanding the readahead windows
  ceph: add a dedicated private data for netfs rreq
  ceph: voluntarily drop Xx caps for requests those touch parent mtime
  ceph: try to dump the msgs when decoding fails
  ceph: only send metrics when the MDS rank is ready

Pull ntfs3 updates from Konstantin Komarov:
 "Updates:
   - support /proc/fs/ntfs3/<dev>/volinfo and label
   - alternative boot if primary boot is corrupted
   - small optimizations

  Fixes:
   - fix endian problems
   - fix logic errors
   - code refactoring and reformatting"

* tag 'ntfs3_for_6.5' of https://github.com/Paragon-Software-Group/linux-ntfs3:
  fs/ntfs3: Correct mode for label entry inside /proc/fs/ntfs3/
  fs/ntfs3: Add support /proc/fs/ntfs3/<dev>/volinfo and /proc/fs/ntfs3/<dev>/label
  fs/ntfs3: Fix endian problem
  fs/ntfs3: Add ability to format new mft records with bigger/smaller header
  fs/ntfs3: Code refactoring
  fs/ntfs3: Code formatting
  fs/ntfs3: Do not update primary boot in ntfs_init_from_boot()
  fs/ntfs3: Alternative boot if primary boot is corrupted
  fs/ntfs3: Mark ntfs dirty when on-disk struct is corrupted
  fs/ntfs3: Fix ntfs_atomic_open
  fs/ntfs3: Correct checking while generating attr_list
  fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_load_attr_list()
  fs: ntfs3: Fix possible null-pointer dereferences in mi_read()
  fs/ntfs3: Return error for inconsistent extended attributes
  fs/ntfs3: Enhance sanity check while generating attr_list
  fs/ntfs3: Use wrapper i_blocksize() in ntfs_zero_range()
  ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()

Pull fsnotify fix from Jan Kara:
 "A fix for fanotify to disallow creating of mount or superblock marks
  for kernel internal pseudo filesystems"

* tag 'fsnotify_for_v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fanotify: disallow mount/sb marks on kernel internal pseudo fs

Pull more RISC-V updates from Palmer Dabbelt:

 - A bunch of fixes/cleanups from the first part of the merge window,
   mostly related to ACPI and vector as those were large

 - Some documentation improvements, mostly related to the new code

 - The "riscv,isa" DT key is deprecated

 - Support for link-time dead code elimination

 - Support for minor fault registration in userfaultd

 - A handful of cleanups around CMO alternatives

* tag 'riscv-for-linus-6.5-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (23 commits)
  riscv: mm: mark noncoherent_supported as __ro_after_init
  riscv: mm: mark CBO relate initialization funcs as __init
  riscv: errata: thead: only set cbom size & noncoherent during boot
  riscv: Select HAVE_ARCH_USERFAULTFD_MINOR
  RISC-V: Document the ISA string parsing rules for ACPI
  risc-v: Fix order of IPI enablement vs RCU startup
  mm: riscv: fix an unsafe pte read in huge_pte_alloc()
  dt-bindings: riscv: deprecate riscv,isa
  RISC-V: drop error print from riscv_hartid_to_cpuid()
  riscv: Discard vector state on syscalls
  riscv: move memblock_allow_resize() after linear mapping is ready
  riscv: Enable ARCH_SUSPEND_POSSIBLE for s2idle
  riscv: vdso: include vdso/vsyscall.h for vdso_data
  selftests: Test RISC-V Vector's first-use handler
  riscv: vector: clear V-reg in the first-use trap
  riscv: vector: only enable interrupts in the first-use trap
  RISC-V: Fix up some vector state related build failures
  RISC-V: Document that V registers are clobbered on syscalls
  riscv: disable HAVE_LD_DEAD_CODE_DATA_ELIMINATION for LLD
  riscv: enable HAVE_LD_DEAD_CODE_DATA_ELIMINATION
  ...

Pull powerpc fixes from Michael Ellerman:

 - Fix PCIe MEM size for pci2 node on Turris 1.x boards

 - Two minor build fixes

Thanks to Christophe Leroy, Douglas Anderson, Pali Rohár, Petr Mladek,
and Randy Dunlap.

* tag 'powerpc-6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: dts: turris1x.dts: Fix PCIe MEM size for pci2 node
  powerpc: Include asm/nmi.c in mobility.c for watchdog_hardlockup_set_timeout_pct()
  powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y

Merge tag 'apparmor-pr-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

Pull apparmor updates from John Johansen:

 - fix missing error check for rhashtable_insert_fast

 - add missing failure check in compute_xmatch_perms

 - fix policy_compat permission remap with extended permissions

 - fix profile verification and enable it

 - fix kzalloc perms tables for shared dfas

 - Fix kernel-doc header for verify_dfa_accept_index

 - aa_buffer: Convert 1-element array to flexible array

 - Return directly after a failed kzalloc() in two functions

 - fix use of strcpy in policy_unpack_test

 - fix kernel-doc complaints

 - Fix some kernel-doc comments

* tag 'apparmor-pr-2023-07-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
  apparmor: Fix kernel-doc header for verify_dfa_accept_index
  apparmor: fix: kzalloc perms tables for shared dfas
  apparmor: fix profile verification and enable it
  apparmor: fix policy_compat permission remap with extended permissions
  apparmor: aa_buffer: Convert 1-element array to flexible array
  apparmor: add missing failure check in compute_xmatch_perms
  apparmor: fix missing error check for rhashtable_insert_fast
  apparmor: Return directly after a failed kzalloc() in two functions
  AppArmor: Fix some kernel-doc comments
  apparmor: fix use of strcpy in policy_unpack_test
  apparmor: fix kernel-doc complaints

Adds the required quirk to enable the Cirrus amp and correct pins
on the ASUS ROG GZ301V series which uses an SPI connected Cirrus amp.

While this works if the related _DSD properties are made available, these
aren't included in the ACPI of these laptops (yet).
Signed-off-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/20230706223323.30871-2-luke@ljones.devSigned-off-by: Takashi Iwai <tiwai@suse.de>

Pull drm fixes from Dave Airlie:
 "Lots of fixes, mostly i915 and amdgpu. It's two weeks of i915, and I
  think three weeks of amdgpu.

  fbdev:
   - Fix module infos on sparc

  panel:
   - Fix mode on Starry-ili9882t

  i915:
   - Allow DC states along with PW2 only for PWB functionality [adlp+]
   - Fix SSC selection for MPLLA [mtl]
   - Use hw.adjusted mode when calculating io/fast wake times [psr]
   - Apply min softlimit correctly [guc/slpc]
   - Assign correct hdcp content type [hdcp]
   - Add missing forward declarations/includes to display power headers
   - Fix BDW PSR AUX CH data register offsets [psr]
   - Use mock device info for creating mock device

  amdgpu:
   - Misc cleanups
   - GFX 9.4.3 fixes
   - DEBUGFS build fix
   - Fix LPDDR5 reporting
   - ASPM fixes
   - DCN 3.1.4 fixes
   - DP MST fixes
   - DCN 3.2.x fixes
   - Display PSR TCON fixes
   - SMU 13.x fixes
   - RAS fixes
   - Vega12/20 SMU fixes
   - PSP flashing cleanup
   - GFX9 MCBP fixes
   - SR-IOV fixes
   - GPUVM clear mappings fix for always valid BOs
   - Add FAMS quirk for problematic monitor
   - Fix possible UAF
   - Better handle monentary temperature fluctuations
   - SDMA 4.4.2 fixes
   - Fencing fix"

* tag 'drm-next-2023-07-07' of git://anongit.freedesktop.org/drm/drm: (83 commits)
  drm/i915: use mock device info for creating mock device
  drm/i915/psr: Fix BDW PSR AUX CH data register offsets
  drm/amdgpu: Fix potential fence use-after-free v2
  drm/amd/pm: avoid unintentional shutdown due to temperature momentary fluctuation
  drm/amd/pm: expose swctf threshold setting for legacy powerplay
  drm/amd/display: 3.2.241
  drm/amd/display: Take full update path if number of planes changed
  drm/amd/display: Create debugging mechanism for Gaming FAMS
  drm/amd/display: Add monitor specific edid quirk
  drm/amd/display: For new fast update path, loop through each surface
  drm/amd/display: Remove Phantom Pipe Check When Calculating K1 and K2
  drm/amd/display: Limit new fast update path to addr and gamma / color
  drm/amd/display: Fix the delta clamping for shaper LUT
  drm/amdgpu: Keep non-psp path for partition switch
  drm/amd/display: program DPP shaper and 3D LUT if updated
  Revert "drm/amd/display: edp do not add non-edid timings"
  drm/amdgpu: share drm device for pci amdgpu device with 1st partition device
  drm/amd/pm: Add GFX v9.4.3 unique id to sysfs
  drm/amd/pm: Enable pp_feature attribute
  drm/amdgpu/vcn: Need to unpause dpg before stop dpg
  ...

Pull more ACPI updates from Rafael Wysocki:
 "These fix a couple of compiler warnings, refine an ACPI device
  enumeration quirk to address a driver regression and clean up code.

  Specifics:

   - Make acpi_companion_match() return a const pointer and update its
     callers accordingly (Andy Shevchenko)

   - Move the extern declaration of the acpi_root variable to a header
     file so as to address a compiler warning (Andy Shevchenko)

   - Address compiler warnings in the ACPI device enumeration code by
     adding a missing header file include to it (Ben Dooks)

   - Refine the SMB0001 quirk in the ACPI device enumeration code so as
     to address an i2c-scmi driver regression (Andy Shevchenko)

   - Clean up two pieces of the ACPI device enumeration code (Andy
     Shevchenko)"

* tag 'acpi-6.5-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: scan: Use the acpi_match_acpi_device() helper
  ACPI: platform: Move SMB0001 HID to the header and reuse
  ACPI: platform: Ignore SMB0001 only when it has resources
  ACPI: bus: Introduce acpi_match_acpi_device() helper
  ACPI: scan: fix undeclared variable warnings by including sleep.h
  ACPI: bus: Constify acpi_companion_match() returned value
  ACPI: scan: Move acpi_root to internal header

Pull mode documentation updates from Jonathan Corbet:
 "A half-dozen late arriving docs patches. They are mostly fixes, but we
  also have a kernel-doc tweak for enums and the long-overdue removal of
  the outdated and redundant patch-submission comments at the top of the
  MAINTAINERS file"

* tag 'docs-6.5-2' of git://git.lwn.net/linux:
  scripts: kernel-doc: support private / public marking for enums
  Documentation: KVM: SEV: add a missing backtick
  Documentation: ACPI: fix typo in ssdt-overlays.rst
  Fix documentation of panic_on_warn
  docs: remove the tips on how to submit patches from MAINTAINERS
  docs: fix typo in zh_TW and zh_CN translation

Pull spi fixes from Mark Brown:
 "A few mostly minor fixes that came in during the merge window, plus
  one administrative update for Jonas' e-mail address.

  The spi-geni-qcom fix is more major than the others, fixing the newly
  added DMA support for large reads which trigger DMA"

* tag 'spi-fix-v6.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: bcm{63xx,bca}-hsspi: update my email address
  spi: rzv2m-csi: Fix SoC product name
  spi: bcm-qspi: return error if neither hif_mspi nor mspi is available
  spi: spi-geni-qcom: enable SPI_CONTROLLER_MUST_TX for GPI DMA mode

Merge tag 'regulator-fix-v6.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "A simple dependency fix for a newly added driver"

* tag 'regulator-fix-v6.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: raa215300: Add build dependency with COMMON_CLK

Pull tracing fixes from Steven Rostedt:

 - Fix bad git merge of #endif in arm64 code

   A merge of the arm64 tree caused #endif to go into the wrong place

 - Fix crash on lseek of write access to tracefs/error_log

   Opening error_log as write only, and then doing an lseek() causes a
   kernel panic, because the lseek() handle expects a "seq_file" to
   exist (which is not done on write only opens). Use tracing_lseek()
   that tests for this instead of calling the default seq lseek handler.

 - Check for negative instead of -E2BIG for error on strscpy() returns

   Instead of testing for -E2BIG from strscpy(), to be more robust,
   check for less than zero, which will make sure it catches any error
   that strscpy() may someday return.

* tag 'trace-v6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/boot: Test strscpy() against less than zero for error
  arm64: ftrace: fix build error with CONFIG_FUNCTION_GRAPH_TRACER=n
  tracing: Fix null pointer dereference in tracing_err_log_open()