We have an application with a lot of threads that use a shared mmap backed
by tmpfs mounted with -o huge=within_size.  This application started
leaking loads of huge pages when we upgraded to a recent kernel.

Using the page ref tracepoints and a BPF program written by Tejun Heo we
were able to determine that these pages would have multiple refcounts from
the page fault path, but when it came to unmap time we wouldn't drop the
number of refs we had added from the faults.

I wrote a reproducer that mmap'ed a file backed by tmpfs with -o
huge=always, and then spawned 20 threads all looping faulting random
offsets in this map, while using madvise(MADV_DONTNEED) randomly for huge
page aligned ranges.  This very quickly reproduced the problem.

The problem here is that we check for the case that we have multiple
threads faulting in a range that was previously unmapped.  One thread maps
the PMD, the other thread loses the race and then returns 0.  However at
this point we already have the page, and we are no longer putting this
page into the processes address space, and so we leak the page.  We
actually did the correct thing prior to f9ce0be7, however it looks
like Kirill copied what we do in the anonymous page case.  In the
anonymous page case we don't yet have a page, so we don't have to drop a
reference on anything.  Previously we did the correct thing for file based
faults by returning VM_FAULT_NOPAGE so we correctly drop the reference on
the page we faulted in.

Fix this by returning VM_FAULT_NOPAGE in the pmd_devmap_trans_unstable()
case, this makes us drop the ref on the page properly, and now my
reproducer no longer leaks the huge pages.

[josef@toxicpanda.com: v2]
  Link: https://lkml.kernel.org/r/e90c8f0dbae836632b669c2afc434006a00d4a67.1657721478.git.josef@toxicpanda.com
Link: https://lkml.kernel.org/r/2b798acfd95c9ab9395fe85e8d5a835e2e10a920.1657051137.git.josef@toxicpanda.com
Fixes: f9ce0be7

 ("mm: Cleanup faultaround and finish_fault() codepaths")
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Chris Mason <clm@fb.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

seth.forshee@canonical.com is no longer valid, use sforshee@kernel.org
instead.

Link: https://lkml.kernel.org/r/20220628200734.424495-1-sforshee@kernel.org


Signed-off-by: Seth Forshee <sforshee@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

An undefined-behavior issue has not been completely fixed since commit
d14f5efa ("tmpfs: fix undefined-behaviour in shmem_reconfigure()"). 
In the commit, check in the shmem_reconfigure() is added in remount
process to avoid the Ubsan problem.  However, the check is not added to
the mount process.  It causes inconsistent results between mount and
remount.  The operations to reproduce the problem in user mode as follows:

If nr_blocks is set to 0x8000000000000000, the mounting is successful.

  # mount tmpfs /dev/shm/ -t tmpfs -o nr_blocks=0x8000000000000000

However, when -o remount is used, the mount fails because of the
check in the shmem_reconfigure()

  # mount tmpfs /dev/shm/ -t tmpfs -o remount,nr_blocks=0x8000000000000000
  mount: /dev/shm: mount point not mounted or bad option.

Therefore, add checks in the shmem_parse_one() function and remove the
check in shmem_reconfigure() to avoid this problem.

Link: https://lkml.kernel.org/r/20220629124324.1640807-1-wangzhaolong1@huawei.com


Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>
Cc: Luo Meng <luomeng12@huawei.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Zhihao Cheng <chengzhihao1@huawei.com>
Cc: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

This patch solves two issues.

(1) The pool allocated by memblock needs to unregister from
kmemleak scanning. Apply kmemleak_ignore_phys to replace the
original kmemleak_free as its address now is stored in the phys tree.

(2) The pool late allocated by page-alloc doesn't need to unregister.
Move out the freeing operation from its call path.

Link: https://lkml.kernel.org/r/20220628113714.7792-2-yee.lee@mediatek.com
Fixes: 0c24e061

 ("mm: kmemleak: add rbtree and store physical address for objects allocated with PA")
Signed-off-by: Yee Lee <yee.lee@mediatek.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Marco Elver <elver@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Currently the implementation will split the PUD when a fallback is taken
inside the create_huge_pud function.  This isn't where it should be done:
the splitting should be done in wp_huge_pud, just like it's done for PMDs.
Reason being that if a callback is taken during create, there is no PUD
yet so nothing to split, whereas if a fallback is taken when encountering
a write protection fault there is something to split.

It looks like this was the original intention with the commit where the
splitting was introduced, but somehow it got moved to the wrong place
between v1 and v2 of the patch series.  Rebase mistake perhaps.

Link: https://lkml.kernel.org/r/6f48d622eb8bce1ae5dd75327b0b73894a2ec407.camel@amazon.com
Fixes: 327e9fd4

 ("mm: Split huge pages on write-notify or COW")
Signed-off-by: James Gowans <jgowans@amazon.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The permission flags of newly created symlinks are wrongly dropped on
nilfs2 with the current umask value even though symlinks should have 777
(rwxrwxrwx) permissions:

 $ umask
 0022
 $ touch file && ln -s file symlink; ls -l file symlink
 -rw-r--r--. 1 root root 0 Jun 23 16:29 file
 lrwxr-xr-x. 1 root root 4 Jun 23 16:29 symlink -> file

This fixes the bug by inserting a missing check that excludes
symlinks.

Link: https://lkml.kernel.org/r/1655974441-5612-1-git-send-email-konishi.ryusuke@gmail.com


Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: Tommy Pettersson <ptp@lysator.liu.se>
Reported-by: Ciprian Craciun <ciprian.craciun@gmail.com>
Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The subpage we calculate is an invalid pointer for device private pages,
because device private pages are mapped via non-present device private
entries, not ordinary present PTEs.

Let's just not compute broken pointers and fixup later.  Move the proper
assignment of the correct subpage to the beginning of the function and
assert that we really only have a single page in our folio.

This currently results in a BUG when tying to compute anon_exclusive,
because:

[  528.727237] BUG: unable to handle page fault for address: ffffea1fffffffc0
[  528.739585] #PF: supervisor read access in kernel mode
[  528.745324] #PF: error_code(0x0000) - not-present page
[  528.751062] PGD 44eaf2067 P4D 44eaf2067 PUD 0
[  528.756026] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  528.760890] CPU: 120 PID: 18275 Comm: hmm-tests Not tainted 5.19.0-rc3-kfd-alex #257
[  528.769542] Hardware name: AMD Corporation BardPeak/BardPeak, BIOS RTY1002BDS 09/17/2021
[  528.778579] RIP: 0010:try_to_migrate_one+0x21a/0x1000
[  528.784225] Code: f6 48 89 c8 48 2b 05 45 d1 6a 01 48 c1 f8 06 48 29
c3 48 8b 45 a8 48 c1 e3 06 48 01 cb f6 41 18 01 48 89 85 50 ff ff ff 74
0b <4c> 8b 33 49 c1 ee 11 41 83 e6 01 48 8b bd 48 ff ff ff e8 3f 99 02
[  528.805194] RSP: 0000:ffffc90003cdfaa0 EFLAGS: 00010202
[  528.811027] RAX: 00007ffff7ff4000 RBX: ffffea1fffffffc0 RCX: ffffeaffffffffc0
[  528.818995] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003cdfaf8
[  528.826962] RBP: ffffc90003cdfb70 R08: 0000000000000000 R09: 0000000000000000
[  528.834930] R10: ffffc90003cdf910 R11: 0000000000000002 R12: ffff888194450540
[  528.842899] R13: ffff888160d057c0 R14: 0000000000000000 R15: 03ffffffffffffff
[  528.850865] FS:  00007ffff7fdb740(0000) GS:ffff8883b0600000(0000) knlGS:0000000000000000
[  528.859891] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  528.866308] CR2: ffffea1fffffffc0 CR3: 00000001562b4003 CR4: 0000000000770ee0
[  528.874275] PKRU: 55555554
[  528.877286] Call Trace:
[  528.880016]  <TASK>
[  528.882356]  ? lock_is_held_type+0xdf/0x130
[  528.887033]  rmap_walk_anon+0x167/0x410
[  528.891316]  try_to_migrate+0x90/0xd0
[  528.895405]  ? try_to_unmap_one+0xe10/0xe10
[  528.900074]  ? anon_vma_ctor+0x50/0x50
[  528.904260]  ? put_anon_vma+0x10/0x10
[  528.908347]  ? invalid_mkclean_vma+0x20/0x20
[  528.913114]  migrate_vma_setup+0x5f4/0x750
[  528.917691]  dmirror_devmem_fault+0x8c/0x250 [test_hmm]
[  528.923532]  do_swap_page+0xac0/0xe50
[  528.927623]  ? __lock_acquire+0x4b2/0x1ac0
[  528.932199]  __handle_mm_fault+0x949/0x1440
[  528.936876]  handle_mm_fault+0x13f/0x3e0
[  528.941256]  do_user_addr_fault+0x215/0x740
[  528.945928]  exc_page_fault+0x75/0x280
[  528.950115]  asm_exc_page_fault+0x27/0x30
[  528.954593] RIP: 0033:0x40366b
...

Link: https://lkml.kernel.org/r/20220623205332.319257-1-david@redhat.com
Fixes: 6c287605

 ("mm: remember exclusively mapped anonymous pages with PG_anon_exclusive")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: "Sierra Guiza, Alejandro (Alex)" <alex.sierra@amd.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Tested-by: Alistair Popple <apopple@nvidia.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/page_table_check.c: In function `__page_table_check_pte_clear':
mm/page_table_check.c:148:6: error: implicit declaration of function `pte_user_accessible_page'; did you mean `user_access_save'? [-Werror=implicit-function-declaration]
  if (pte_user_accessible_page(pte)) {
      ^~~~~~~~~~~~~~~~~~~~~~~~
      user_access_save

ARCH_SUPPORTS_PAGE_TABLE_CHECK should only enabled with MMU.

Link: https://lkml.kernel.org/r/20220624085236.18544-1-yuehaibing@huawei.com
Fixes: 3fee229a

 ("riscv/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Tong Tiangen <tongtiangen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

When building htmldocs on Linus's tree, there are inline emphasis warnings
on include/linux/highmem.h:

Documentation/vm/highmem:166: ./include/linux/highmem.h:154: WARNING: Inline emphasis start-string without end-string.
Documentation/vm/highmem:166: ./include/linux/highmem.h:157: WARNING: Inline emphasis start-string without end-string.

These warnings above are due to comments in code example at the mentioned
lines above are enclosed by double dash (--), which confuses Sphinx as
inline markup delimiters instead.

Fix these warnings by indenting the code example with literal block
indentation and making the comments C comments.

Link: https://lkml.kernel.org/r/20220622084546.17745-1-bagasdotme@gmail.com
Fixes: 85a85e76

 ("Documentation/vm: move "Using kmap-atomic" to highmem.h")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Higher order allocations for vmemmap pages from buddy allocator must be
able to be treated as indepdenent small pages as they can be freed
individually by the caller.  There is no problem for higher order vmemmap
pages allocated at boot time since each individual small page will be
initialized at boot time.  However, it will be an issue for memory hotplug
case since those higher order vmemmap pages are allocated from buddy
allocator without initializing each individual small page's refcount.  The
system will panic in put_page_testzero() when CONFIG_DEBUG_VM is enabled
if the vmemmap page is freed.

Link: https://lkml.kernel.org/r/20220620023019.94257-1-songmuchun@bytedance.com
Fixes: d8d55f56

 ("mm: sparsemem: use page table lock to protect kernel pmd operations")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The huge_ptep_set_access_flags() can not make the huge pte old according
to the discussion [1], that means we will always mornitor the young state
of the hugetlb though we stopped accessing the hugetlb, as a result DAMON
will get inaccurate accessing statistics.

So changing to use set_huge_pte_at() to make the huge pte old to fix this
issue.

[1] https://lore.kernel.org/all/Yqy97gXI4Nqb7dYo@arm.com/

Link: https://lkml.kernel.org/r/1655692482-28797-1-git-send-email-baolin.wang@linux.alibaba.com
Fixes: 49f4203a

 ("mm/damon: add access checking for hugetlb pages")
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Recently, nommu iounmap() was converted from a static inline function to a
macro again, basically reverting commit 4580ba4a ("sh: Convert
iounmap() macros to inline functions").  With -Werror, this leads to build
failures like:

    drivers/iio/adc/xilinx-ams.c: In function `ams_iounmap_ps':
    drivers/iio/adc/xilinx-ams.c:1195:14: error: unused variable `ams' [-Werror=unused-variable]
     1195 |  struct ams *ams = data;
	  |              ^~~

Fix this by replacing the macros for ioremap() and iounmap() by static
inline functions, based on <asm-generic/io.h>.

Link: https://lkml.kernel.org/r/8d1b1766260961799b04035e7bc39a7f59729f72.1655708312.git.geert+renesas@glider.be
Fixes: 13f1fc87

 ("sh: move the ioremap implementation out of line")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

When fallocate() is used on a shmem file, the pages we allocate can end up
with !PageUptodate.

Since UFFDIO_CONTINUE tries to find the existing page the user wants to
map with SGP_READ, we would fail to find such a page, since
shmem_getpage_gfp returns with a "NULL" pagep for SGP_READ if it discovers
!PageUptodate.  As a result, UFFDIO_CONTINUE returns -EFAULT, as it would
do if the page wasn't found in the page cache at all.

This isn't the intended behavior.  UFFDIO_CONTINUE is just trying to find
if a page exists, and doesn't care whether it still needs to be cleared or
not.  So, instead of SGP_READ, pass in SGP_NOALLOC.  This is the same,
except for one critical difference: in the !PageUptodate case, SGP_NOALLOC
will clear the page and then return it.  With this change, UFFDIO_CONTINUE
works properly (succeeds) on a shmem file which has been fallocated, but
otherwise not modified.

Link: https://lkml.kernel.org/r/20220610173812.1768919-1-axelrasmussen@google.com
Fixes: 15313257

 ("userfaultfd/shmem: support UFFDIO_CONTINUE for shmem")
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Pull ARM SoC fixes from Arnd Bergmann:
 "A number of fixes have accumulated, but they are largely for harmless
  issues:

   - Several OF node leak fixes

   - A fix to the Exynos7885 UART clock description

   - DTS fixes to prevent boot failures on TI AM64 and J721s2

   - Bus probe error handling fixes for Baikal-T1

   - A fixup to the way STM32 SoCs use separate dts files for different
     firmware stacks

   - Multiple code fixes for Arm SCMI firmware, all dealing with
     robustness of the implementation

   - Multiple NXP i.MX devicetree fixes, addressing incorrect data in DT
     nodes

   - Three updates to the MAINTAINERS file, including Florian Fainelli
     taking over BCM283x/BCM2711 (Raspberry Pi) from Nicolas Saenz
     Julienne"

* tag 'soc-fixes-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (29 commits)
  ARM: dts: aspeed: nuvia: rename vendor nuvia to qcom
  arm: mach-spear: Add missing of_node_put() in time.c
  ARM: cns3xxx: Fix refcount leak in cns3xxx_init
  MAINTAINERS: Update email address
  arm64: dts: ti: k3-am64-main: Remove support for HS400 speed mode
  arm64: dts: ti: k3-j721s2: Fix overlapping GICD memory region
  ARM: dts: bcm2711-rpi-400: Fix GPIO line names
  bus: bt1-axi: Don't print error on -EPROBE_DEFER
  bus: bt1-apb: Don't print error on -EPROBE_DEFER
  ARM: Fix refcount leak in axxia_boot_secondary
  ARM: dts: stm32: move SCMI related nodes in a dedicated file for stm32mp15
  soc: imx: imx8m-blk-ctrl: fix display clock for LCDIF2 power domain
  ARM: dts: imx6qdl-colibri: Fix capacitive touch reset polarity
  ARM: dts: imx6qdl: correct PU regulator ramp delay
  firmware: arm_scmi: Fix incorrect error propagation in scmi_voltage_descriptors_get
  firmware: arm_scmi: Avoid using extended string-buffers sizes if not necessary
  firmware: arm_scmi: Fix SENSOR_AXIS_NAME_GET behaviour when unsupported
  ARM: dts: imx7: Move hsic_phy power domain to HSIC PHY node
  soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe
  MAINTAINERS: Update BCM2711/BCM2835 maintainer
  ...

Pull hotfixes from Andrew Morton:
 "Minor things, mainly - mailmap updates, MAINTAINERS updates, etc.

  Fixes for this merge window:

   - fix for a damon boot hang, from SeongJae

   - fix for a kfence warning splat, from Jason Donenfeld

   - fix for zero-pfn pinning, from Alex Williamson

   - fix for fallocate hole punch clearing, from Mike Kravetz

  Fixes for previous releases:

   - fix for a performance regression, from Marcelo

   - fix for a hwpoisining BUG from zhenwei pi"

* tag 'mm-hotfixes-stable-2022-06-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mailmap: add entry for Christian Marangi
  mm/memory-failure: disable unpoison once hw error happens
  hugetlbfs: zero partial pages during fallocate hole punch
  mm: memcontrol: reference to tools/cgroup/memcg_slabinfo.py
  mm: re-allow pinning of zero pfns
  mm/kfence: select random number before taking raw lock
  MAINTAINERS: add maillist information for LoongArch
  MAINTAINERS: update MM tree references
  MAINTAINERS: update Abel Vesa's email
  MAINTAINERS: add MEMORY HOT(UN)PLUG section and add David as reviewer
  MAINTAINERS: add Miaohe Lin as a memory-failure reviewer
  mailmap: add alias for jarkko@profian.com
  mm/damon/reclaim: schedule 'damon_reclaim_timer' only after 'system_wq' is initialized
  kthread: make it clear that kthread_create_on_node() might be terminated by any fatal signal
  mm: lru_cache_disable: use synchronize_rcu_expedited
  mm/page_isolation.c: fix one kernel-doc comment

Merge tag 'perf-tools-fixes-for-v5.19-2022-06-26' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Enable ignore_missing_thread in 'perf stat', enabling counting with
   '--pid' when threads disappear during counting session setup

 - Adjust output data offset for backward compatibility in 'perf inject'

 - Fix missing free in copy_kcore_dir() in 'perf inject'

 - Fix caching files with a wrong build ID

 - Sync drm, cpufeatures, vhost and svn headers with the kernel

* tag 'perf-tools-fixes-for-v5.19-2022-06-26' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  tools headers UAPI: Synch KVM's svm.h header with the kernel
  tools include UAPI: Sync linux/vhost.h with the kernel sources
  perf stat: Enable ignore_missing_thread
  perf inject: Adjust output data offset for backward compatibility
  perf trace beauty: Fix generation of errno id->str table on ALT Linux
  perf build-id: Fix caching files with a wrong build ID
  tools headers cpufeatures: Sync with the kernel sources
  tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
  perf inject: Fix missing free in copy_kcore_dir()

Pull btrfs fixes from David Sterba:

 - zoned relocation fixes:
      - fix critical section end for extent writeback, this could lead
        to out of order write
      - prevent writing to previous data relocation block group if space
        gets low

 - reflink fixes:
      - fix race between reflinking and ordered extent completion
      - proper error handling when block reserve migration fails
      - add missing inode iversion/mtime/ctime updates on each iteration
        when replacing extents

 - fix deadlock when running fsync/fiemap/commit at the same time

 - fix false-positive KCSAN report regarding pid tracking for read locks
   and data race

 - minor documentation update and link to new site

* tag 'for-5.19-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  Documentation: update btrfs list of features and link to readthedocs.io
  btrfs: fix deadlock with fsync+fiemap+transaction commit
  btrfs: don't set lock_owner when locking extent buffer for reading
  btrfs: zoned: fix critical section of relocation inode writeback
  btrfs: zoned: prevent allocation from previous data relocation BG
  btrfs: do not BUG_ON() on failure to migrate space when replacing extents
  btrfs: add missing inode updates on each iteration when replacing extents
  btrfs: fix race between reflinking and ordered extent completion

Pull dma-mapping fix from Christoph Hellwig:

 - pass the correct size to dma_set_encrypted() when freeing memory
   (Dexuan Cui)

* tag 'dma-mapping-5.19-2022-06-26' of git://git.infradead.org/users/hch/dma-mapping:
  dma-direct: use the correct size for dma_set_encrypted()

Pull fbdev fixes from Helge Deller:
 "Two bug fixes for the pxa3xx and intelfb drivers:

   - pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write

   - intelfb: Initialize value of stolen size

  The other changes are small cleanups, simplifications and
  documentation updates to the cirrusfb, skeletonfb, omapfb,
  intelfb, au1100fb and simplefb drivers"

* tag 'for-5.19/fbdev-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  video: fbdev: omap: Remove duplicate 'the' in comment
  video: fbdev: omapfb: Align '*' in comment
  video: fbdev: simplefb: Check before clk_put() not needed
  video: fbdev: au1100fb: Drop unnecessary NULL ptr check
  video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write
  video: fbdev: skeletonfb: Convert to generic power management
  video: fbdev: cirrusfb: Remove useless reference to PCI power management
  video: fbdev: intelfb: Initialize value of stolen size
  video: fbdev: intelfb: Use aperture size from pci_resource_len
  video: fbdev: skeletonfb: Fix syntax errors in comments

Pull parisc architecture fixes from Helge Deller:

 - enable ARCH_HAS_STRICT_MODULE_RWX to prevent a boot crash on c8000
   machines

 - flush all mappings of a shared anonymous page on PA8800/8900 machines
   via flushing the whole data cache. This may slow down such machines
   but makes sure that the cache is consistent

 - Fix duplicate definition build error regarding fb_is_primary_device()

* tag 'for-5.19/parisc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Enable ARCH_HAS_STRICT_MODULE_RWX
  parisc: Fix flush_anon_page on PA8800/PA8900
  parisc: align '*' in comment in math-emu code
  parisc/stifb: Fix fb_is_primary_device() only available with CONFIG_FB_STI

Pull xtensa fixes from Max Filippov:

 - fix OF reference leaks in xtensa arch code

 - replace '.bss' with '.section .bss' to fix entry.S build with old
   assembler

* tag 'xtensa-20220626' of https://github.com/jcmvbkbc/linux-xtensa:
  xtensa: change '.bss' to '.section .bss'
  xtensa: xtfpga: Fix refcount leak bug in setup
  xtensa: Fix refcount leak bug in time.c

Pull powerpc fixes from Michael Ellerman:

 - A fix for a CMA change that broke booting guests with > 2G RAM on
   Power8 hosts.

 - Fix the RTAS call filter to allow a special case that applications
   rely on.

 - A change to our execve path, to make the execve syscall exit
   tracepoint work.

 - Three fixes to wire up our various RNGs earlier in boot so they're
   available for use in the initial seeding in random_init().

 - A build fix for when KASAN is enabled along with
   STRUCTLEAK_BYREF_ALL.

Thanks to Andrew Donnellan, Aneesh Kumar K.V, Christophe Leroy, Jason
Donenfeld, Nathan Lynch, Naveen N. Rao, Sathvika Vasireddy, Sumit
Dubey2, Tyrel Datwyler, and Zi Yan.

* tag 'powerpc-5.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/powernv: wire up rng during setup_arch
  powerpc/prom_init: Fix build failure with GCC_PLUGIN_STRUCTLEAK_BYREF_ALL and KASAN
  powerpc/rtas: Allow ibm,platform-dump RTAS call with null buffer address
  powerpc: Enable execve syscall exit tracepoint
  powerpc/pseries: wire up rng during setup_arch()
  powerpc/microwatt: wire up rng during setup_arch()
  powerpc/mm: Move CMA reservations after initmem_init()

Merge tag 'kbuild-fixes-v5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix modpost to detect EXPORT_SYMBOL marked as __init or__exit

 - Update the supported arch list in the LLVM document

 - Avoid the second link of vmlinux for CONFIG_TRIM_UNUSED_KSYMS

 - Avoid false __KSYM___this_module define in include/generated/autoksyms.h

* tag 'kbuild-fixes-v5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: Ignore __this_module in gen_autoksyms.sh
  kbuild: link vmlinux only once for CONFIG_TRIM_UNUSED_KSYMS (2nd attempt)
  Documentation/llvm: Update Supported Arch table
  modpost: fix section mismatch check for exported init/exit sections

Pull exfat fix from Namjae Jeon:

 - Use updated exfat_chain directly instead of snapshot values in
   rename.

* tag 'exfat-for-5.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: use updated exfat_chain directly during renaming

Pull cifs client fixes from Steve French:
 "Fixes addressing important multichannel, and reconnect issues.

  Multichannel mounts when the server network interfaces changed, or ip
  addresses changed, uncovered problems, especially in reconnect, but
  the patches for this were held up until recently due to some lock
  conflicts that are now addressed.

  Included in this set of fixes:

   - three fixes relating to multichannel reconnect, dynamically
     adjusting the list of server interfaces to avoid problems during
     reconnect

   - a lock conflict fix related to the above

   - two important fixes for negotiate on secondary channels (null
     netname can unintentionally cause multichannel to be disabled to
     some servers)

   - a reconnect fix (reporting incorrect IP address in some cases)"

* tag '5.19-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update cifs_ses::ip_addr after failover
  cifs: avoid deadlocks while updating iface
  cifs: periodically query network interfaces from server
  cifs: during reconnect, update interface if necessary
  cifs: change iface_list from array to sorted linked list
  smb3: use netname when available on secondary channels
  smb3: fix empty netname context on secondary channels

To pick up the changes from:

  d5af44dd ("x86/sev: Provide support for SNP guest request NAEs")
  0afb6b66 ("x86/sev: Use SEV-SNP AP creation to start secondary CPUs")
  dc3f3d24 ("x86/mm: Validate memory when changing the C-bit")
  cbd3d4f7

 ("x86/sev: Check SEV-SNP features support")

That gets these new SVM exit reasons:

+       { SVM_VMGEXIT_PSC,              "vmgexit_page_state_change" }, \
+       { SVM_VMGEXIT_GUEST_REQUEST,    "vmgexit_guest_request" }, \
+       { SVM_VMGEXIT_EXT_GUEST_REQUEST, "vmgexit_ext_guest_request" }, \
+       { SVM_VMGEXIT_AP_CREATION,      "vmgexit_ap_creation" }, \
+       { SVM_VMGEXIT_HV_FEATURES,      "vmgexit_hypervisor_feature" }, \

Addressing this perf build warning:

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

This causes these changes:

  CC      /tmp/build/perf-urgent/arch/x86/util/kvm-stat.o
  LD      /tmp/build/perf-urgent/arch/x86/util/perf-in.o
  LD      /tmp/build/perf-urgent/arch/x86/perf-in.o
  LD      /tmp/build/perf-urgent/arch/perf-in.o
  LD      /tmp/build/perf-urgent/perf-in.o
  LINK    /tmp/build/perf-urgent/perf

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To get the changes in:

  84d7c8fd ("vhost-vdpa: introduce uAPI to set group ASID")
  2d1fcb77 ("vhost-vdpa: uAPI to get virtqueue group id")
  a0c95f20 ("vhost-vdpa: introduce uAPI to get the number of address spaces")
  3ace88bd ("vhost-vdpa: introduce uAPI to get the number of virtqueue groups")
  175d493c ("vhost: move the backend feature bits to vhost_types.h")

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/vhost.h' differs from latest version at 'include/uapi/linux/vhost.h'
  diff -u tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h

To pick up these changes and support them:

  $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > before
  $ cp include/uapi/linux/vhost.h tools/include/uapi/linux/vhost.h
  $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > after
  $ diff -u before after
  --- before	2022-06-26 12:04:35.982003781 -0300
  +++ after	2022-06-26 12:04:43.819972476 -0300
  @@ -28,6 +28,7 @@
   	[0x74] = "VDPA_SET_CONFIG",
   	[0x75] = "VDPA_SET_VRING_ENABLE",
   	[0x77] = "VDPA_SET_CONFIG_CALL",
  +	[0x7C] = "VDPA_SET_GROUP_ASID",
   };
   static const char *vhost_virtio_ioctl_read_cmds[] = {
   	[0x00] = "GET_FEATURES",
  @@ -39,5 +40,8 @@
   	[0x76] = "VDPA_GET_VRING_NUM",
   	[0x78] = "VDPA_GET_IOVA_RANGE",
   	[0x79] = "VDPA_GET_CONFIG_SIZE",
  +	[0x7A] = "VDPA_GET_AS_NUM",
  +	[0x7B] = "VDPA_GET_VRING_GROUP",
   	[0x80] = "VDPA_GET_VQS_COUNT",
  +	[0x81] = "VDPA_GET_GROUP_NUM",
   };
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Gautam Dawar <gautam.dawar@xilinx.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/Yrh3xMYbfeAD0MFL@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf already support ignore_missing_thread for -p, but not yet
applied to `perf stat -p <pid>`. This patch enables ignore_missing_thread
for `perf stat -p <pid>`.

Committer notes:

And here is a refresher about the 'ignore_missing_thread' knob, from a
previous patch using it:

  ca800068

 ("perf evsel: Enable ignore_missing_thread for pid option")

  ---
    While monitoring a multithread process with pid option, perf sometimes
    may return sys_perf_event_open failure with 3(No such process) if any of
    the process's threads die before we open the event. However, we want
    perf continue monitoring the remaining threads and do not exit with
    error.
  ---

Signed-off-by: Gang Li <ligang.bdlg@bytedance.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.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/20220622030037.15005-1-ligang.bdlg@bytedance.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

When 'perf inject' creates a new file, it reuses the data offset from
the input file. If there has been a change on the size of the header, as
happened in v5.12 -> v5.13, the new offsets will be wrong, resulting in
a corrupted output file.

This change adds the function perf_session__data_offset to compute the
data offset based on the current header size, and uses that instead of
the offset from the original input file.

Signed-off-by: Raul Silvera <rsilvera@google.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Colin Ian King <colin.king@intel.com>
Cc: Dave Marchevsky <davemarchevsky@fb.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: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220621152725.2668041-1-rsilvera@google.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

For some reason using:

         cat <<EoFuncBegin
  static const char *errno_to_name__$arch(int err)
  {
         switch (err) {
  EoFuncBegin

In tools/perf/trace/beauty/arch_errno_names.sh isn't working on ALT
Linux sisyphus (development version), which could be some distro
specific glitch, so just get this done in an alternative way that works
everywhere while giving notice to the people working on that distro to
try and figure our what really took place.

Cc: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Build ID events associate a file name with a build ID.  However, when
using perf inject, there is no guarantee that the file on the current
machine at the current time has that build ID. Fix by comparing the
build IDs and skip adding to the cache if they are different.

Example:

  $ echo "int main() {return 0;}" > prog.c
  $ gcc -o prog prog.c
  $ perf record --buildid-all ./prog
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.019 MB perf.data ]
  $ file-buildid() { file $1 | awk -F= '{print $2}' | awk -F, '{print $1}' ; }
  $ file-buildid prog
  444ad9be165d8058a48ce2ffb4e9f55854a3293e
  $ file-buildid ~/.debug/$(pwd)/prog/444ad9be165d8058a48ce2ffb4e9f55854a3293e/elf
  444ad9be165d8058a48ce2ffb4e9f55854a3293e
  $ echo "int main() {return 1;}" > prog.c
  $ gcc -o prog prog.c
  $ file-buildid prog
  885524d5aaa24008a3e2b06caa3ea95d013c0fc5

Before:

  $ perf buildid-cache --purge $(pwd)/prog
  $ perf inject -i perf.data -o junk
  $ file-buildid ~/.debug/$(pwd)/prog/444ad9be165d8058a48ce2ffb4e9f55854a3293e/elf
  885524d5aaa24008a3e2b06caa3ea95d013c0fc5
  $

After:

  $ perf buildid-cache --purge $(pwd)/prog
  $ perf inject -i perf.data -o junk
  $ file-buildid ~/.debug/$(pwd)/prog/444ad9be165d8058a48ce2ffb4e9f55854a3293e/elf

  $

Fixes: 454c407e

 ("perf: add perf-inject builtin")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Link: https://lore.kernel.org/r/20220621125144.5623-1-adrian.hunter@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick the changes from:

  d6d0c7f6 ("x86/cpufeatures: Add PerfMonV2 feature bit")
  296d5a17 ("KVM: SEV-ES: Use V_TSC_AUX if available instead of RDTSC/MSR_TSC_AUX intercepts")
  f3090339 ("x86/cpufeatures: Add virtual TSC_AUX feature bit")
  8ad7e8f6 ("x86/fpu/xsave: Support XSAVEC in the kernel")
  59bd54a8 ("x86/tdx: Detect running as a TDX guest in early boot")
  a77d41ac ("x86/cpufeatures: Add AMD Fam19h Branch Sampling feature")

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

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Babu Moger <babu.moger@amd.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/lkml/YrDkgmwhLv+nKeOo@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

To pick up the changes in:

  ecf8eca5 ("drm/i915/xehp: Add compute engine ABI")
  991b4de3 ("drm/i915/uapi: Add kerneldoc for engine class enum")
  c94fde8f ("drm/i915/uapi: Add DRM_I915_QUERY_GEOMETRY_SUBSLICES")
  1c671ad7 ("drm/i915/doc: Link query items to their uapi structs")
  a2e54026 ("drm/i915/doc: Convert perf UAPI comments to kerneldoc")
  462ac1cd ("drm/i915/doc: Convert drm_i915_query_topology_info comment to kerneldoc")
  034d47b2 ("drm/i915/uapi: Document DRM_I915_QUERY_HWCONFIG_BLOB")
  78e1fb31 ("drm/i915/uapi: Add query for hwconfig blob")

That don't add any new ioctl, so no changes in tooling.

This silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from latest version at 'include/uapi/drm/i915_drm.h'
  diff -u tools/include/uapi/drm/i915_drm.h include/uapi/drm/i915_drm.h

Cc: John Harrison <John.C.Harrison@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://lore.kernel.org/lkml/YrDi4ALYjv9Mdocq@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Free string allocated by asprintf().

Fixes: d8fc0855

 ("perf inject: Keep a copy of kcore_dir")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220620103904.7960-1-adrian.hunter@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Fix a boot crash on a c8000 machine as reported by Dave.  Basically it changes
patch_map() to return an alias mapping to the to-be-patched code in order to
prevent writing to write-protected memory.

Signed-off-by: Helge Deller <deller@gmx.de>
Suggested-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org   # v5.2+
Link: https://lore.kernel.org/all/e8ec39e8-25f8-e6b4-b7ed-4cb23efc756e@bell.net/

Anonymous pages are allocated with the shared mappings colouring,
SHM_COLOUR. Since the alias boundary on machines with PA8800 and
PA8900 processors is unknown, flush_user_cache_page() might not
flush all mappings of a shared anonymous page. Flushing the whole
data cache flushes all mappings.

This won't fix all coherency issues with shared mappings but it
seems to work well in practice.  I haven't seen any random memory
faults in almost a month on a rp3440 running as a debian buildd
machine.

There is a small preformance hit.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v5.18+

Signed-off-by: Jiang Jian <jiangjian@cdjrlc.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Helge Deller <deller@gmx.de>

Module object files can contain an undefined reference to __this_module,
which isn't resolved until we link the final .ko. The kernel doesn't
export this symbol, so ignore it in gen_autoksyms.sh.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Steve Muckle <smuckle@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Ramji Jiyani <ramjiyani@google.com>

If CONFIG_TRIM_UNUSED_KSYMS is enabled and the kernel is built from
a pristine state, the vmlinux is linked twice.

Commit 3fdc7d3f ("kbuild: link vmlinux only once for
CONFIG_TRIM_UNUSED_KSYMS") explains why this happens, but it did not fix
the issue at all.

Now I realized I had applied a wrong patch.

In v1 patch [1], the autoksyms_recursive target correctly recurses to
"$(MAKE) -f $(srctree)/Makefile autoksyms_recursive".

In v2 patch [2], I accidentally dropped the diff line, and it recurses to
"$(MAKE) -f $(srctree)/Makefile vmlinux".

Restore the code I intended in v1.

[1]: https://lore.kernel.org/linux-kbuild/1521045861-22418-8-git-send-email-yamada.masahiro@socionext.com/
[2]: https://lore.kernel.org/linux-kbuild/1521166725-24157-8-git-send-email-yamada.masahiro@socionext.com/

Fixes: 3fdc7d3f

 ("kbuild: link vmlinux only once for CONFIG_TRIM_UNUSED_KSYMS")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>