The sort function has the inbuilt reversal option.  We can use it to save
some time.

Link: https://lkml.kernel.org/r/20230106091319.3824-1-apantykhin@gmail.comSigned-off-by: Alexander Pantyukhin <apantykhin@gmail.com>
Cc: Nikolay Borisov <nborisov@suse.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

This command provides a way to traverse the entire page hierarchy by a
given virtual address on x86.  In addition to qemu's commands info
tlb/info mem it provides the complete information about the paging
structure for an arbitrary virtual address.  It supports 4KB/2MB/1GB and 5
level paging.

Here is an example output for 2MB success translation:

(gdb) translate-vm address
cr3:
    cr3 binary data                0x1085be003
    next entry physical address   0x1085be000
    ---
    bit  3          page level write through       False
    bit  4          page level cache disabled      False
level 4:
    entry address                  0xffff8881085be7f8
    page entry binary data         0x800000010ac83067
    next entry physical address   0x10ac83000
    ---
    bit  0          entry present                  True
    bit  1          read/write access allowed      True
    bit  2          user access allowed            True
    bit  3          page level write through       False
    bit  4          page level cache disabled      False
    bit  5          entry has been accessed        True
    bit  7          page size                      False
    bit  11         restart to ordinary            False
    bit  63         execute disable                True
level 3:
    entry address                  0xffff88810ac83a48
    page entry binary data         0x101af7067
    next entry physical address   0x101af7000
    ---
    bit  0          entry present                  True
    bit  1          read/write access allowed      True
    bit  2          user access allowed            True
    bit  3          page level write through       False
    bit  4          page level cache disabled      False
    bit  5          entry has been accessed        True
    bit  7          page size                      False
    bit  11         restart to ordinary            False
    bit  63         execute disable                False
level 2:
    entry address                  0xffff888101af7368
    page entry binary data         0x80000001634008e7
    page size                      2MB
    page physical address         0x163400000
    ---
    bit  0          entry present                  True
    bit  1          read/write access allowed      True
    bit  2          user access allowed            True
    bit  3          page level write through       False
    bit  4          page level cache disabled      False
    bit  5          entry has been accessed        True
    bit  7          page size                      True
    bit  6          page dirty                     True
    bit  8          global translation             False
    bit  11         restart to ordinary            True
    bit  12         pat                            False
    bits (59, 62)   protection key                 0
    bit  63         execute disable                True

[dmitrii.bundin.a@gmail.com: add SPDX line, other tweaks]
  Link: https://lkml.kernel.org/r/20230113175151.22278-1-dmitrii.bundin.a@gmail.com
[akpm@linux-foundation.org: s/physicall/physical/]
Link: https://lkml.kernel.org/r/20230102171014.31408-1-dmitrii.bundin.a@gmail.comSigned-off-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
Acked by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The header is the direct user of definitions from the math.h, include it.

Link: https://lkml.kernel.org/r/20230103121937.32085-1-andriy.shevchenko@linux.intel.comSigned-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

When destroying a kthread worker warn if there are still some pending
delayed works.  This indicates that the caller should clear all pending
delayed works before destroying the kthread worker.

Link: https://lkml.kernel.org/r/20230104144230.938521-1-qiang1.zhang@intel.comSigned-off-by: Zqiang <qiang1.zhang@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Add a few more typos that found from real patches[1,2] to 'spelling' file.

[1] https://lore.kernel.org/linux-mm/4bc4ab74-3ccd-f892-b387-d48451463d3c@huawei.com/
[2] https://lore.kernel.org/damon/20221228174621.34868-1-sj@kernel.org/

Link: https://lkml.kernel.org/r/20230104184017.1724-1-sj@kernel.orgSigned-off-by: SeongJae Park <sj@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Drew Fustini <dfustini@baylibre.com>
Cc: Joe Perches <joe@perches.com>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

/proc/cmdline is never removed, mark is as permanent for slightly faster
open and close.

Link: https://lkml.kernel.org/r/Y66xAveh2yUsP7m9@p183Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

It was suggested by Fabio that kunmap() be marked deprecated in
checkpatch.[1] This did not seem necessary until an invalid conversion of
kmap_local_page() appeared in mainline.[2][3] The introduction of this bug
would have been flagged with kunmap() being marked deprecated.

Add kunmap() and kunmap_atomic() to checkpatch to help prevent further
confusion.

[1] https://lore.kernel.org/all/1884934.6tgchFWduM@suse/
[2] d406d267 ("cifs: skip alloc when request has no pages")
[3] https://lore.kernel.org/r/20221229-cifs-kmap-v1-1-c70d0e9a53eb@intel.com

Link: https://lkml.kernel.org/r/20221229-kmap-checkpatch-v2-1-919fc4d4e3c2@intel.comSigned-off-by: Ira Weiny <ira.weiny@intel.com>
Suggested-by: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Patch series "spelling: Fix some trivial typos".

Seems like permitted has two t's :), Lets add that to spellings to help
others.


This patch (of 3):

Add another common typo. Noticed when I sent a patch with the typo and
in kvm and of.

[ribalda@chromium.org: fix trivial typo]
  Link: https://lkml.kernel.org/r/20221220-permited-v1-2-52ea9857fa61@chromium.org
Link: https://lkml.kernel.org/r/20221220-permited-v1-1-52ea9857fa61@chromium.orgSigned-off-by: Ricardo Ribalda <ribalda@chromium.org>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Variables are assigned first and then used.  Initialization is not
required.

[akpm@linux-foundation.org: give hfsplus_listxattr:key_len narrower scope]
Link: https://lkml.kernel.org/r/20221221032119.10037-1-xupengfei@nfschina.comSigned-off-by: XU pengfei <xupengfei@nfschina.com>
Reviewed-by: Andrew Morton <akpm@linux-foudation.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

When working on SoC bring-up, (a full) userspace may not be available,
making it hard to benchmark the CPU performance of the system under
development.  Still, one may want to have a rough idea of the (relative)
performance of one or more CPU cores, especially when working on e.g.  the
clock driver that controls the CPU core clock(s).

Hence make the classical Dhrystone 2.1 benchmark available as a Linux
kernel test module, based on[1].

When built-in, this benchmark can be run without any userspace present.

Parallel runs (run on multiple CPU cores) are supported, just kick the
"run" file multiple times.

Note that the actual figures depend on the configuration options that
control compiler optimization (e.g.  CONFIG_CC_OPTIMIZE_FOR_SIZE vs. 
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE), and on the compiler options used when
building the kernel in general.  Hence numbers may differ from those
obtained by running similar benchmarks in userspace.

[1] https://github.com/qris/dhrystone-deb.gitSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lkml.kernel.org/r/4d07ad990740a5f1e426ce4566fb514f60ec9bdd.1670509558.git.geert+renesas@glider.beSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: David Gow <davidgow@google.com>
[geert+renesas@glider.be: fix uninitialized use of ret]
 Link: https://lkml.kernel.org/r/alpine.DEB.2.22.394.2212190857310.137329@ramsan.of.borgSigned-off-by: Andrew Morton <akpm@linux-foundation.org>

The percpu interface is supposed to be preempt and irq safe.

But:
The uniprocessor implementation of percpu_counter_add() is not irq safe:
if an interrupt happens during the +=, then the result is undefined.

Therefore: switch from preempt_disable() to local_irq_save().
This prevents interrupts from interrupting the +=, and as a side effect
prevents preemption.

Link: https://lkml.kernel.org/r/20221216150441.200533-2-manfred@colorfullife.comSigned-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: "Sun, Jiebin" <jiebin.sun@intel.com>
Cc: <1vier1@web.de>
Cc: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Patch series "various irq handling fixes/docu updates".

If an interrupt happens between __this_cpu_read(*fbc->counters) and
this_cpu_add(*fbc->counters, amount), and that interrupt modifies the
per_cpu_counter, then the this_cpu_add() after the interrupt returns may
under/overflow.

Link: https://lkml.kernel.org/r/20221216150155.200389-1-manfred@colorfullife.com
Link: https://lkml.kernel.org/r/20221216150441.200533-1-manfred@colorfullife.comSigned-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: "Sun, Jiebin" <jiebin.sun@intel.com>
Cc: <1vier1@web.de>
Cc: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Syzbot found a kernel BUG in hfs_bnode_put():

 kernel BUG at fs/hfs/bnode.c:466!
 invalid opcode: 0000 [#1] PREEMPT SMP KASAN
 CPU: 0 PID: 3634 Comm: kworker/u4:5 Not tainted 6.1.0-rc7-syzkaller-00190-g97ee9d1c #0
 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
 Workqueue: writeback wb_workfn (flush-7:0)
 RIP: 0010:hfs_bnode_put+0x46f/0x480 fs/hfs/bnode.c:466
 Code: 8a 80 ff e9 73 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a0 fe ff ff 48 89 df e8 db 8a 80 ff e9 93 fe ff ff e8 a1 68 2c ff <0f> 0b e8 9a 68 2c ff 0f 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56
 RSP: 0018:ffffc90003b4f258 EFLAGS: 00010293
 RAX: ffffffff825e318f RBX: 0000000000000000 RCX: ffff8880739dd7c0
 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
 RBP: ffffc90003b4f430 R08: ffffffff825e2d9b R09: ffffed10045157d1
 R10: ffffed10045157d1 R11: 1ffff110045157d0 R12: ffff8880228abe80
 R13: ffff88807016c000 R14: dffffc0000000000 R15: ffff8880228abe00
 FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00007fa6ebe88718 CR3: 000000001e93d000 CR4: 00000000003506f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 Call Trace:
  <TASK>
  hfs_write_inode+0x1bc/0xb40
  write_inode fs/fs-writeback.c:1440 [inline]
  __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1652
  writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1878
  __writeback_inodes_wb+0x125/0x420 fs/fs-writeback.c:1949
  wb_writeback+0x440/0x7b0 fs/fs-writeback.c:2054
  wb_check_start_all fs/fs-writeback.c:2176 [inline]
  wb_do_writeback fs/fs-writeback.c:2202 [inline]
  wb_workfn+0x827/0xef0 fs/fs-writeback.c:2235
  process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
  worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
  kthread+0x266/0x300 kernel/kthread.c:376
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
  </TASK>

The BUG_ON() is triggered at here:

/* Dispose of resources used by a node */
void hfs_bnode_put(struct hfs_bnode *node)
{
	if (node) {
 		<skipped>
 		BUG_ON(!atomic_read(&node->refcnt)); <- we have issue here!!!!
 		<skipped>
 	}
}

By tracing the refcnt, I found the node is created by hfs_bmap_alloc()
with refcnt 1.  Then the node is used by hfs_btree_write().  There is a
missing of hfs_bnode_get() after find the node.  The issue happened in
following path:

<alloc>
 hfs_bmap_alloc
   hfs_bnode_find
     __hfs_bnode_create   <- allocate a new node with refcnt 1.
   hfs_bnode_put          <- decrease the refcnt

<write>
 hfs_btree_write
   hfs_bnode_find
     __hfs_bnode_create
       hfs_bnode_findhash <- find the node without refcnt increased.
   hfs_bnode_put	  <- trigger the BUG_ON() since refcnt is 0.

Link: https://lkml.kernel.org/r/20221212021627.3766829-1-liushixin2@huawei.com
Reported-by: syzbot+5b04b49a7ec7226c7426@syzkaller.appspotmail.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Cc: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Cc: Viacheslav Dubeyko <slava@dubeyko.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Add a section about the requirements of the error injectable functions and
the type of errors.

Since this section must be read before using ALLOW_ERROR_INJECTION()
macro, that section is referred from the comment of the macro too.

Link: https://lkml.kernel.org/r/167081321427.387937.15475445689482551048.stgit@devnote3
Link: https://lore.kernel.org/all/20221211115218.2e6e289bb85f8cf53c11aa97@kernel.org/T/#uSigned-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Chris Mason <clm@meta.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Florent Revest <revest@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Patch series "error-injection: Clarify the requirements of error
injectable functions".

Patches for clarifying the requirement of error injectable functions and
to remove the confusing EI_ETYPE_NONE.


This patch (of 2):

Since the EI_ETYPE_NONE is confusing type, replace it with appropriate
errno.  The EI_ETYPE_NONE has been introduced for a dummy (error) value,
but it can mislead people that they can use ALLOW_ERROR_INJECTION(func,
NONE).  So remove it from the EI_ETYPE and use appropriate errno instead.

[akpm@linux-foundation.org: include/linux/error-injection.h needs errno.h]
Link: https://lkml.kernel.org/r/167081319306.387937.10079195394503045678.stgit@devnote3
Link: https://lkml.kernel.org/r/167081320421.387937.4259807348852421112.stgit@devnote3
Fixes: 663faf9f ("error-injection: Add injectable error types")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Chris Mason <clm@meta.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Florent Revest <revest@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

generic_ptr is a void * type and does not require a cast.

Link: https://lkml.kernel.org/r/20221213073633.3586-1-zeming@nfschina.comSigned-off-by: Li zeming <zeming@nfschina.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The void * type pointer does not need to be cast and assigned to another
pointer.

Link: https://lkml.kernel.org/r/20221213074522.3738-1-zeming@nfschina.comSigned-off-by: Li zeming <zeming@nfschina.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Merge branch 'master' into mm-nonmm-stable

Pull x86 fixes from Borislav Petkov:

 - Make sure the poking PGD is pinned for Xen PV as it requires it this
   way

 - Fixes for two resctrl races when moving a task or creating a new
   monitoring group

 - Fix SEV-SNP guests running under HyperV where MTRRs are disabled to
   not return a UC- type mapping type on memremap() and thus cause a
   serious slowdown

 - Fix insn mnemonics in bioscall.S now that binutils is starting to fix
   confusing insn suffixes

* tag 'x86_urgent_for_v6.2_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: fix poking_init() for Xen PV guests
  x86/resctrl: Fix event counts regression in reused RMIDs
  x86/resctrl: Fix task CLOSID/RMID update race
  x86/pat: Fix pat_x_mtrr_type() for MTRR disabled case
  x86/boot: Avoid using Intel mnemonics in AT&T syntax asm

Pull EDAC fixes from Borislav Petkov:

 - Fix the EDAC device's confusion in the polling setting units

 - Fix a memory leak in highbank's probing function

* tag 'edac_urgent_for_v6.2_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/highbank: Fix memory leak in highbank_mc_probe()
  EDAC/device: Fix period calculation in edac_device_reset_delay_period()

Pull powerpc fixes from Michael Ellerman:

 - Fix a build failure with some versions of ld that have an odd version
   string

 - Fix incorrect use of mutex in the IMC PMU driver

Thanks to Kajol Jain, Michael Petlan, Ojaswin Mujoo, Peter Zijlstra, and
Yang Yingliang.

* tag 'powerpc-6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/hash: Make stress_hpt_timer_fn() static
  powerpc/imc-pmu: Fix use of mutex in IRQs disabled section
  powerpc/boot: Fix incorrect version calculation issue in ld_version

Pull iommu fixes from Joerg Roedel:

 - Core: Fix an iommu-group refcount leak

 - Fix overflow issue in IOVA alloc path

 - ARM-SMMU fixes from Will:
    - Fix VFIO regression on NXP SoCs by reporting IOMMU_CAP_CACHE_COHERENCY
    - Fix SMMU shutdown paths to avoid device unregistration race

 - Error handling fix for Mediatek IOMMU driver

* tag 'iommu-fixes-v6.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()
  iommu/iova: Fix alloc iova overflows issue
  iommu: Fix refcount leak in iommu_device_claim_dma_owner
  iommu/arm-smmu-v3: Don't unregister on shutdown
  iommu/arm-smmu: Don't unregister on shutdown
  iommu/arm-smmu: Report IOMMU_CAP_CACHE_COHERENCY even betterer

Pull memblock fix from Mike Rapoport:
 "memblock: always release pages to the buddy allocator in
  memblock_free_late()

  If CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, memblock_free_pages()
  only releases pages to the buddy allocator if they are not in the
  deferred range. This is correct for free pages (as defined by
  for_each_free_mem_pfn_range_in_zone()) because free pages in the
  deferred range will be initialized and released as part of the
  deferred init process.

  memblock_free_pages() is called by memblock_free_late(), which is used
  to free reserved ranges after memblock_free_all() has run. All pages
  in reserved ranges have been initialized at that point, and
  accordingly, those pages are not touched by the deferred init process.

  This means that currently, if the pages that memblock_free_late()
  intends to release are in the deferred range, they will never be
  released to the buddy allocator. They will forever be reserved.

  In addition, memblock_free_pages() calls kmsan_memblock_free_pages(),
  which is also correct for free pages but is not correct for reserved
  pages. KMSAN metadata for reserved pages is initialized by
  kmsan_init_shadow(), which runs shortly before memblock_free_all().

  For both of these reasons, memblock_free_pages() should only be called
  for free pages, and memblock_free_late() should call
  __free_pages_core() directly instead.

  One case where this issue can occur in the wild is EFI boot on x86_64.
  The x86 EFI code reserves all EFI boot services memory ranges via
  memblock_reserve() and frees them later via memblock_free_late()
  (efi_reserve_boot_services() and efi_free_boot_services(),
  respectively).

  If any of those ranges happens to fall within the deferred init range,
  the pages will not be released and that memory will be unavailable.

  For example, on an Amazon EC2 t3.micro VM (1 GB) booting via EFI:

    v6.2-rc2:
    Node 0, zone      DMA
          spanned  4095
          present  3999
          managed  3840
    Node 0, zone    DMA32
          spanned  246652
          present  245868
          managed  178867

    v6.2-rc2 + patch:
    Node 0, zone      DMA
          spanned  4095
          present  3999
          managed  3840
    Node 0, zone    DMA32
          spanned  246652
          present  245868
          managed  222816   # +43,949 pages"

* tag 'fixes-2023-01-14' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
  mm: Always release pages to the buddy allocator in memblock_free_late().

Pull kernel hardening fixes from Kees Cook:

 - Fix CFI hash randomization with KASAN (Sami Tolvanen)

 - Check size of coreboot table entry and use flex-array

* tag 'hardening-v6.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kbuild: Fix CFI hash randomization with KASAN
  firmware: coreboot: Check size of table entry and use flex-array

Pull module fix from Luis Chamberlain:
 "Just one fix for modules by Nick"

* tag 'modules-6.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
  kallsyms: Fix scheduling with interrupts disabled in self-test

Pull cifs fixes from Steve French:

 - memory leak and double free fix

 - two symlink fixes

 - minor cleanup fix

 - two smb1 fixes

* tag '6.2-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Fix uninitialized memory read for smb311 posix symlink create
  cifs: fix potential memory leaks in session setup
  cifs: do not query ifaces on smb1 mounts
  cifs: fix double free on failed kerberos auth
  cifs: remove redundant assignment to the variable match
  cifs: fix file info setting in cifs_open_file()
  cifs: fix file info setting in cifs_query_path_info()

Pull SCSI fixes from James Bottomley:
 "Two minor fixes in the hisi_sas driver which only impact enterprise
  style multi-expander and shared disk situations and no core changes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: hisi_sas: Set a port invalid only if there are no devices attached when refreshing port id
  scsi: hisi_sas: Use abort task set to reset SAS disks when discovered

Pull ATA fix from Damien Le Moal:
 "A single fix to prevent building the pata_cs5535 driver with user mode
  linux as it uses msr operations that are not defined with UML"

* tag 'ata-6.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: pata_cs5535: Don't build on UML

Pull block fixes from Jens Axboe:
 "Nothing major in here, just a collection of NVMe fixes and dropping a
  wrong might_sleep() that static checkers tripped over but which isn't
  valid"

* tag 'block-6.2-2023-01-13' of git://git.kernel.dk/linux:
  MAINTAINERS: stop nvme matching for nvmem files
  nvme: don't allow unprivileged passthrough on partitions
  nvme: replace the "bool vec" arguments with flags in the ioctl path
  nvme: remove __nvme_ioctl
  nvme-pci: fix error handling in nvme_pci_enable()
  nvme-pci: add NVME_QUIRK_IDENTIFY_CNS quirk to Apple T2 controllers
  nvme-apple: add NVME_QUIRK_IDENTIFY_CNS quirk to fix regression
  block: Drop spurious might_sleep() from blk_put_queue()

Pull io_uring fixes from Jens Axboe:
 "A fix for a regression that happened last week, rest is fixes that
  will be headed to stable as well. In detail:

   - Fix for a regression added with the leak fix from last week (me)

   - In writing a test case for that leak, inadvertently discovered a
     case where we a poll request can race. So fix that up and mark it
     for stable, and also ensure that fdinfo covers both the poll tables
     that we have. The latter was an oversight when the split poll table
     were added (me)

   - Fix for a lockdep reported issue with IOPOLL (Pavel)"

* tag 'io_uring-6.2-2023-01-13' of git://git.kernel.dk/linux:
  io_uring: lock overflowing for IOPOLL
  io_uring/poll: attempt request issue after racy poll wakeup
  io_uring/fdinfo: include locked hash table in fdinfo output
  io_uring/poll: add hash if ready poll request can't complete inline
  io_uring/io-wq: only free worker if it was allocated for creation

Pull pci fixes from Bjorn Helgaas:

 - Work around apparent firmware issue that made Linux reject MMCONFIG
   space, which broke PCI extended config space (Bjorn Helgaas)

 - Fix CONFIG_PCIE_BT1 dependency due to mid-air collision between a
   PCI_MSI_IRQ_DOMAIN -> PCI_MSI change and addition of PCIE_BT1 (Lukas
   Bulwahn)

* tag 'pci-v6.2-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space
  x86/pci: Simplify is_mmconf_reserved() messages
  PCI: dwc: Adjust to recent removal of PCI_MSI_IRQ_DOMAIN

Clang emits a asan.module_ctor constructor to each object file
when KASAN is enabled, and these functions are indirectly called
in do_ctors. With CONFIG_CFI_CLANG, the compiler also emits a CFI
type hash before each address-taken global function so they can
pass indirect call checks.

However, in commit 0c3e806e ("x86/cfi: Add boot time hash
randomization"), x86 implemented boot time hash randomization,
which relies on the .cfi_sites section generated by objtool. As
objtool is run against vmlinux.o instead of individual object
files with X86_KERNEL_IBT (enabled by default), CFI types in
object files that are not part of vmlinux.o end up not being
included in .cfi_sites, and thus won't get randomized and trip
CFI when called.

Only .vmlinux.export.o and init/version-timestamp.o are linked
into vmlinux separately from vmlinux.o. As these files don't
contain any functions, disable KASAN for both of them to avoid
breaking hash randomization.

Link: https://github.com/ClangBuiltLinux/linux/issues/1742
Fixes: 0c3e806e ("x86/cfi: Add boot time hash randomization")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230112224948.1479453-2-samitolvanen@google.com

The memcpy() of the data following a coreboot_table_entry couldn't
be evaluated by the compiler under CONFIG_FORTIFY_SOURCE. To make it
easier to reason about, add an explicit flexible array member to struct
coreboot_device so the entire entry can be copied at once. Additionally,
validate the sizes before copying. Avoids this run-time false positive
warning:

  memcpy: detected field-spanning write (size 168) of single field "&device->entry" at drivers/firmware/google/coreboot_table.c:103 (size 8)
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Link: https://lore.kernel.org/all/03ae2704-8c30-f9f0-215b-7cdf4ad35a9a@molgen.mpg.de/
Cc: Jack Rosenthal <jrosenth@chromium.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Link: https://lore.kernel.org/r/20230107031406.gonna.761-kees@kernel.orgReviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Link: https://lore.kernel.org/r/20230112230312.give.446-kees@kernel.org

kallsyms_on_each* may schedule so must not be called with interrupts
disabled. The iteration function could disable interrupts, but this
also changes lookup_symbol() to match the change to the other timing
code.
Reported-by: Erhard F. <erhard_f@mailbox.org>
Link: https://lore.kernel.org/all/bug-216902-206035@https.bugzilla.kernel.org%2F/Reported-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/oe-lkp/202212251728.8d0872ff-oliver.sang@intel.com
Fixes: 30f3bb09 ("kallsyms: Add self-test facility")
Tested-by: "Erhard F." <erhard_f@mailbox.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

This driver uses MSR functions that aren't implemented under UML.
Avoid building it to prevent tripping up allyesconfig.

e.g.
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x3a3): undefined reference to `__tracepoint_read_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x3d2): undefined reference to `__tracepoint_write_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x457): undefined reference to `__tracepoint_write_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x481): undefined reference to `do_trace_write_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x4d5): undefined reference to `do_trace_write_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x4f5): undefined reference to `do_trace_read_msr'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: pata_cs5535.c:(.text+0x51c): undefined reference to `do_trace_write_msr'
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

Pull kvm fixes from Paolo Bonzini:
 "ARM:

   - Fix the PMCR_EL0 reset value after the PMU rework

   - Correctly handle S2 fault triggered by a S1 page table walk by not
     always classifying it as a write, as this breaks on R/O memslots

   - Document why we cannot exit with KVM_EXIT_MMIO when taking a write
     fault from a S1 PTW on a R/O memslot

   - Put the Apple M2 on the naughty list for not being able to
     correctly implement the vgic SEIS feature, just like the M1 before
     it

   - Reviewer updates: Alex is stepping down, replaced by Zenghui

  x86:

   - Fix various rare locking issues in Xen emulation and teach lockdep
     to detect them

   - Documentation improvements

   - Do not return host topology information from KVM_GET_SUPPORTED_CPUID"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86/xen: Avoid deadlock by adding kvm->arch.xen.xen_lock leaf node lock
  KVM: Ensure lockdep knows about kvm->lock vs. vcpu->mutex ordering rule
  KVM: x86/xen: Fix potential deadlock in kvm_xen_update_runstate_guest()
  KVM: x86/xen: Fix lockdep warning on "recursive" gpc locking
  Documentation: kvm: fix SRCU locking order docs
  KVM: x86: Do not return host topology information from KVM_GET_SUPPORTED_CPUID
  KVM: nSVM: clarify recalc_intercepts() wrt CR8
  MAINTAINERS: Remove myself as a KVM/arm64 reviewer
  MAINTAINERS: Add Zenghui Yu as a KVM/arm64 reviewer
  KVM: arm64: vgic: Add Apple M2 cpus to the list of broken SEIS implementations
  KVM: arm64: Convert FSC_* over to ESR_ELx_FSC_*
  KVM: arm64: Document the behaviour of S1PTW faults on RO memslots
  KVM: arm64: Fix S1PTW handling on RO memslots
  KVM: arm64: PMU: Fix PMCR_EL0 reset value

On the x86-64 architecture even a failing cmpxchg grants exclusive
access to the cacheline, making it preferable to retry the failed op
immediately instead of stalling with the pause instruction.

To illustrate the impact, below are benchmark results obtained by
running various will-it-scale tests on top of the 6.2-rc3 kernel and
Cascade Lake (2 sockets * 24 cores * 2 threads) CPU.

All results in ops/s.  Note there is some variance in re-runs, but the
code is consistently faster when contention is present.

  open3 ("Same file open/close"):
  proc          stock       no-pause
     1         805603         814942       (+%1)
     2        1054980        1054781       (-0%)
     8        1544802        1822858      (+18%)
    24        1191064        2199665      (+84%)
    48         851582        1469860      (+72%)
    96         609481        1427170     (+134%)

  fstat2 ("Same file fstat"):
  proc          stock       no-pause
     1        3013872        3047636       (+1%)
     2        4284687        4400421       (+2%)
     8        3257721        5530156      (+69%)
    24        2239819        5466127     (+144%)
    48        1701072        5256609     (+209%)
    96        1269157        6649326     (+423%)

Additionally, a kernel with a private patch to help access() scalability:
access2 ("Same file access"):

  proc          stock        patched      patched
                                         +nopause
    24        2378041        2005501      5370335  (-15% / +125%)

That is, fixing the problems in access itself *reduces* scalability
after the cacheline ping-pong only happens in lockref with the pause
instruction.

Note that fstat and access benchmarks are not currently integrated into
will-it-scale, but interested parties can find them in pull requests to
said project.

Code at hand has a rather tortured history.  First modification showed
up in commit d472d9d9 ("lockref: Relax in cmpxchg loop"), written
with Itanium in mind.  Later it got patched up to use an arch-dependent
macro to stop doing it on s390 where it caused a significant regression.
Said macro had undergone revisions and was ultimately eliminated later,
going back to cpu_relax.

While I intended to only remove cpu_relax for x86-64, I got the
following comment from Linus:

    I would actually prefer just removing it entirely and see if
    somebody else hollers. You have the numbers to prove it hurts on
    real hardware, and I don't think we have any numbers to the
    contrary.

    So I think it's better to trust the numbers and remove it as a
    failure, than say "let's just remove it on x86-64 and leave
    everybody else with the potentially broken code"

Additionally, Will Deacon (maintainer of the arm64 port, one of the
architectures previously benchmarked):

    So, from the arm64 side of the fence, I'm perfectly happy just
    removing the cpu_relax() calls from lockref.

As such, come back full circle in history and whack it altogether.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/all/CAGudoHHx0Nqg6DE70zAVA75eV-HXfWyhVMWZ-aSeOofkA_=WdA@mail.gmail.com/
Acked-by: Tony Luck <tony.luck@intel.com> # ia64
Acked-by: Nicholas Piggin <npiggin@gmail.com> # powerpc
Acked-by: Will Deacon <will@kernel.org> # arm64
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Normally we reject ECAM space unless it is reported as reserved in the E820
table or via a PNP0C02 _CRS method (PCI Firmware, r3.3, sec 4.1.2).

07eab090 ("efi/x86: Remove EfiMemoryMappedIO from E820 map"), removes
E820 entries that correspond to EfiMemoryMappedIO regions because some
other firmware uses EfiMemoryMappedIO for PCI host bridge windows, and the
E820 entries prevent Linux from allocating BAR space for hot-added devices.

Some firmware doesn't report ECAM space via PNP0C02 _CRS methods, but does
mention it as an EfiMemoryMappedIO region via EFI GetMemoryMap(), which is
normally converted to an E820 entry by a bootloader or EFI stub.  After
07eab090, that E820 entry is removed, so we reject this ECAM space,
which makes PCI extended config space (offsets 0x100-0xfff) inaccessible.

The lack of extended config space breaks anything that relies on it,
including perf, VSEC telemetry, EDAC, QAT, SR-IOV, etc.

Allow use of ECAM for extended config space when the region is covered by
an EfiMemoryMappedIO region, even if it's not included in E820 or PNP0C02
_CRS.

Link: https://lore.kernel.org/r/ac2693d8-8ba3-72e0-5b66-b3ae008d539d@linux.intel.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216891
Fixes: 07eab090 ("efi/x86: Remove EfiMemoryMappedIO from E820 map")
Link: https://lore.kernel.org/r/20230110180243.1590045-3-helgaas@kernel.orgReported-by: Kan Liang <kan.liang@linux.intel.com>
Reported-by: Tony Luck <tony.luck@intel.com>
Reported-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reported-by: Yunying Sun <yunying.sun@intel.com>
Reported-by: Baowen Zheng <baowen.zheng@corigine.com>
Reported-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reported-by: Yang Lixiao <lixiao.yang@intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Tested-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Yunying Sun <yunying.sun@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>

Pull EFI fixes from Ard Biesheuvel:

 - avoid a potential crash on the efi_subsys_init() error path

 - use more appropriate error code for runtime services calls issued
   after a crash in the firmware occurred

 - avoid READ_ONCE() for accessing firmware tables that may appear
   misaligned in memory

* tag 'efi-fixes-for-v6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efi: tpm: Avoid READ_ONCE() for accessing the event log
  efi: rt-wrapper: Add missing include
  efi: fix userspace infinite retry read efivars after EFI runtime services page fault
  efi: fix NULL-deref in init error path