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  1. 03 Sep, 2023 17 commits
  3. 27 Aug, 2023 2 commits
  5. 26 Aug, 2023 7 commits
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2023-08-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 28f20a19
      Linus Torvalds authored 
      Pull x86 fixes from Ingo Molnar:
 "Fix an FPU invalidation bug on exec(), and fix a performance
  regression due to a missing setting of X86_FEATURE_OSXSAVE"

* tag 'x86-urgent-2023-08-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4
  x86/fpu: Invalidate FPU state correctly on exec()
      28f20a19
    • Linus Torvalds's avatar
      Merge tag 'irq-urgent-2023-08-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3b35375f
      Linus Torvalds authored 
      Pull irq fix from Thomas Gleixner:
 "A last minute fix for a regression introduced in the v6.5 merge
  window.

  The conversion of the software based interrupt resend mechanism to
  hlist missed to add a check whether the descriptor is already enqueued
  and dropped the interrupt descriptor lookup for nested interrupts.

  The missing check whether the descriptor is already queued causes
  hlist corruption and can be observed in the wild. The dropped parent
  descriptor lookup has not yet caused problems, but it would result in
  stale interrupt line in the worst case.

  Add the missing enqueued check and bring the descriptor lookup back to
  cure this"

* tag 'irq-urgent-2023-08-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Fix software resend lockup and nested resend
      3b35375f
    • Linus Torvalds's avatar
      Merge tag 'loongarch-fixes-6.5-2' of... · c3137613
      Linus Torvalds authored 
      Merge tag 'loongarch-fixes-6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Fix a ptrace bug, a hw_breakpoint bug, some build errors/warnings and
  some trivial cleanups"

* tag 'loongarch-fixes-6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: Fix hw_breakpoint_control() for watchpoints
  LoongArch: Ensure FP/SIMD registers in the core dump file is up to date
  LoongArch: Put the body of play_dead() into arch_cpu_idle_dead()
  LoongArch: Add identifier names to arguments of die() declaration
  LoongArch: Return earlier in die() if notify_die() returns NOTIFY_STOP
  LoongArch: Do not kill the task in die() if notify_die() returns NOTIFY_STOP
  LoongArch: Remove <asm/export.h>
  LoongArch: Replace #include <asm/export.h> with #include <linux/export.h>
  LoongArch: Remove unneeded #include <asm/export.h>
  LoongArch: Replace -ffreestanding with finer-grained -fno-builtin's
  LoongArch: Remove redundant "source drivers/firmware/Kconfig"
      c3137613
    • Johan Hovold's avatar
      genirq: Fix software resend lockup and nested resend · 9f5deb55
      Johan Hovold authored 
      The switch to using hlist for managing software resend of interrupts
broke resend in at least two ways:

First, unconditionally adding interrupt descriptors to the resend list can
corrupt the list when the descriptor in question has already been
added. This causes the resend tasklet to loop indefinitely with interrupts
disabled as was recently reported with the Lenovo ThinkPad X13s after
threaded NAPI was disabled in the ath11k WiFi driver.

This bug is easily fixed by restoring the old semantics of irq_sw_resend()
so that it can be called also for descriptors that have already been marked
for resend.

Second, the offending commit also broke software resend of nested
interrupts by simply discarding the code that made sure that such
interrupts are retriggered using the parent interrupt.

Add back the corresponding code that adds the parent descriptor to the
resend list.

Fixes: bc06a9e0 ("genirq: Use hlist for managing resend handlers")
Signed-off-by: default avatarJohan Hovold <johan+linaro@kernel.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/lkml/20230809073432.4193-1-johan+linaro@kernel.org/
Link: https://lore.kernel.org/r/20230826154004.1417-1-johan+linaro@kernel.org
      9f5deb55
    • Huacai Chen's avatar
      LoongArch: Fix hw_breakpoint_control() for watchpoints · 9730870b
      Huacai Chen authored 
      In hw_breakpoint_control(), encode_ctrl_reg() has already encoded the
MWPnCFG3_LoadEn/MWPnCFG3_StoreEn bits in info->ctrl. We don't need to
add (1 << MWPnCFG3_LoadEn | 1 << MWPnCFG3_StoreEn) unconditionally.

Otherwise we can't set read watchpoint and write watchpoint separately.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      9730870b
    • Huacai Chen's avatar
      LoongArch: Ensure FP/SIMD registers in the core dump file is up to date · 656f9aec
      Huacai Chen authored 
      This is a port of commit 379eb01c ("riscv: Ensure the value
of FP registers in the core dump file is up to date").

The values of FP/SIMD registers in the core dump file come from the
thread.fpu. However, kernel saves the FP/SIMD registers only before
scheduling out the process. If no process switch happens during the
exception handling, kernel will not have a chance to save the latest
values of FP/SIMD registers. So it may cause their values in the core
dump file incorrect. To solve this problem, force fpr_get()/simd_get()
to save the FP/SIMD registers into the thread.fpu if the target task
equals the current task.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      656f9aec
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · 7d2f353b
      Linus Torvalds authored 
      Pull clk fixes from Stephen Boyd:
 "One clk driver fix and two clk framework fixes:

   - Fix an OOB access when devm_get_clk_from_child() is used and
     devm_clk_release() casts the void pointer to the wrong type

   - Move clk_rate_exclusive_{get,put}() within the correct ifdefs in
     clk.h so that the stubs are used when CONFIG_COMMON_CLK=n

   - Register the proper clk provider function depending on the value of
     #clock-cells in the TI keystone driver"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: Fix slab-out-of-bounds error in devm_clk_release()
  clk: Fix undefined reference to `clk_rate_exclusive_{get,put}'
  clk: keystone: syscon-clk: Fix audio refclk
      7d2f353b
  7. 25 Aug, 2023 14 commits
    • Helge Deller's avatar
      lib/clz_ctz.c: Fix __clzdi2() and __ctzdi2() for 32-bit kernels · 382d4cd1
      Helge Deller authored 
      The gcc compiler translates on some architectures the 64-bit
__builtin_clzll() function to a call to the libgcc function __clzdi2(),
which should take a 64-bit parameter on 32- and 64-bit platforms.

But in the current kernel code, the built-in __clzdi2() function is
defined to operate (wrongly) on 32-bit parameters if BITS_PER_LONG ==
32, thus the return values on 32-bit kernels are in the range from
[0..31] instead of the expected [0..63] range.

This patch fixes the in-kernel functions __clzdi2() and __ctzdi2() to
take a 64-bit parameter on 32-bit kernels as well, thus it makes the
functions identical for 32- and 64-bit kernels.

This bug went unnoticed since kernel 3.11 for over 10 years, and here
are some possible reasons for that:

 a) Some architectures have assembly instructions to count the bits and
    which are used instead of calling __clzdi2(), e.g. on x86 the bsr
    instruction and on ppc cntlz is used. On such architectures the
    wrong __clzdi2() implementation isn't used and as such the bug has
    no effect and won't be noticed.

 b) Some architectures link to libgcc.a, and the in-kernel weak
    functions get replaced by the correct 64-bit variants from libgcc.a.

 c) __builtin_clzll() and __clzdi2() doesn't seem to be used in many
    places in the kernel, and most likely only in uncritical functions,
    e.g. when printing hex values via seq_put_hex_ll(). The wrong return
    value will still print the correct number, but just in a wrong
    formatting (e.g. with too many leading zeroes).

 d) 32-bit kernels aren't used that much any longer, so they are less
    tested.

A trivial testcase to verify if the currently running 32-bit kernel is
affected by the bug is to look at the output of /proc/self/maps:

Here the kernel uses a correct implementation of __clzdi2():

  root@debian:~# cat /proc/self/maps
  00010000-00019000 r-xp 00000000 08:05 787324     /usr/bin/cat
  00019000-0001a000 rwxp 00009000 08:05 787324     /usr/bin/cat
  0001a000-0003b000 rwxp 00000000 00:00 0          [heap]
  f7551000-f770d000 r-xp 00000000 08:05 794765     /usr/lib/hppa-linux-gnu/libc.so.6
  ...

and this kernel uses the broken implementation of __clzdi2():

  root@debian:~# cat /proc/self/maps
  0000000010000-0000000019000 r-xp 00000000 000000008:000000005 787324  /usr/bin/cat
  0000000019000-000000001a000 rwxp 000000009000 000000008:000000005 787324  /usr/bin/cat
  000000001a000-000000003b000 rwxp 00000000 00:00 0  [heap]
  00000000f73d1000-00000000f758d000 r-xp 00000000 000000008:000000005 794765  /usr/lib/hppa-linux-gnu/libc.so.6
  ...
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
Fixes: 4df87bb7 ("lib: add weak clz/ctz functions")
Cc: Chanho Min <chanho.min@lge.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      382d4cd1
    • Linus Torvalds's avatar
      Merge tag 'mm-hotfixes-stable-2023-08-25-11-07' of... · 6f0edbb8
      Linus Torvalds authored 
      Merge tag 'mm-hotfixes-stable-2023-08-25-11-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "18 hotfixes. 13 are cc:stable and the remainder pertain to post-6.4
  issues or aren't considered suitable for a -stable backport"

* tag 'mm-hotfixes-stable-2023-08-25-11-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  shmem: fix smaps BUG sleeping while atomic
  selftests: cachestat: catch failing fsync test on tmpfs
  selftests: cachestat: test for cachestat availability
  maple_tree: disable mas_wr_append() when other readers are possible
  madvise:madvise_free_pte_range(): don't use mapcount() against large folio for sharing check
  madvise:madvise_free_huge_pmd(): don't use mapcount() against large folio for sharing check
  madvise:madvise_cold_or_pageout_pte_range(): don't use mapcount() against large folio for sharing check
  mm: multi-gen LRU: don't spin during memcg release
  mm: memory-failure: fix unexpected return value in soft_offline_page()
  radix tree: remove unused variable
  mm: add a call to flush_cache_vmap() in vmap_pfn()
  selftests/mm: FOLL_LONGTERM need to be updated to 0x100
  nilfs2: fix general protection fault in nilfs_lookup_dirty_data_buffers()
  mm/gup: handle cont-PTE hugetlb pages correctly in gup_must_unshare() via GUP-fast
  selftests: cgroup: fix test_kmem_basic less than error
  mm: enable page walking API to lock vmas during the walk
  smaps: use vm_normal_page_pmd() instead of follow_trans_huge_pmd()
  mm/gup: reintroduce FOLL_NUMA as FOLL_HONOR_NUMA_FAULT
      6f0edbb8
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-6.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · 4942fed8
      Linus Torvalds authored 
      Pull RISC-V fixes from Palmer Dabbelt:
 "This is obviously not ideal, particularly for something this late in
  the cycle.

  Unfortunately we found some uABI issues in the vector support while
  reviewing the GDB port, which has triggered a revert -- probably a
  good sign we should have reviewed GDB before merging this, I guess I
  just dropped the ball because I was so worried about the context
  extension and libc suff I forgot. Hence the late revert.

  There's some risk here as we're still exposing the vector context for
  signal handlers, but changing that would have meant reverting all of
  the vector support. The issues we've found so far have been fixed
  already and they weren't absolute showstoppers, so we're essentially
  just playing it safe by holding ptrace support for another release (or
  until we get through a proper userspace code review).

  Summary:

   - The vector ucontext extension has been extended with vlenb

   - The vector registers ELF core dump note type has been changed to
     avoid aliasing with the CSR type used in embedded systems

   - Support for accessing vector registers via ptrace() has been
     reverted

   - Another build fix for the ISA spec changes around Zifencei/Zicsr
     that manifests on some systems built with binutils-2.37 and
     gcc-11.2"

* tag 'riscv-for-linus-6.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix build errors using binutils2.37 toolchains
  RISC-V: vector: export VLENB csr in __sc_riscv_v_state
  RISC-V: Remove ptrace support for vectors
      4942fed8
    • Linus Torvalds's avatar
      Merge tag 'gpio-fixes-for-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux · 98c6b8a5
      Linus Torvalds authored 
      Pull gpio fixes from Bartosz Golaszewski:

 - fix an irq mapping leak in gpio-sim

 - associate the GPIO device's software node with the irq domain in
   gpio-sim

* tag 'gpio-fixes-for-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: sim: pass the GPIO device's software node to irq domain
  gpio: sim: dispose of irq mappings before destroying the irq_sim domain
      98c6b8a5
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · a87eaffb
      Linus Torvalds authored 
      Pull pin control fixes from Linus Walleij:
 "Here are some Renesas and AMD driver fixes, the AMD fix affects
  important laptops in the wild so this one is pretty important. It
  seems a bit tough to get this right.

   - Fix DT parsing and related locking in the Renesas driver.

   - Fix wakeup IRQs in the AMD driver once again. Really tricky this
     one"

* tag 'pinctrl-v6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: amd: Mask wake bits on probe again
  pinctrl: renesas: rza2: Add lock around pinctrl_generic{{add,remove}_group,{add,remove}_function}
  pinctrl: renesas: rzv2m: Fix NULL pointer dereference in rzv2m_dt_subnode_to_map()
  pinctrl: renesas: rzg2l: Fix NULL pointer dereference in rzg2l_dt_subnode_to_map()
      a87eaffb
    • Linus Torvalds's avatar
      Merge tag 'sound-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · ced5bf24
      Linus Torvalds authored 
      Pull sound fixes from Takashi Iwai:
 "Hopefully the last bits for 6.5. It's slightly higher LOCs than
  wished, but it doesn't look scary.

  The biggest change is MAINTAINERS update for TI; it's good to have the
  update before the final release, so that people can contact to the
  right persons for bug reports (which shouldn't happen of course!)

  The rest are all device-specific fixes and quirks, most for various
  ASoC platforms"

* tag 'sound-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: amd: yc: Fix a non-functional mic on Lenovo 82SJ
  ALSA: ymfpci: Fix the missing snd_card_free() call at probe error
  ASoC: cs35l41: Correct amp_gain_tlv values
  ASoC: amd: yc: Add VivoBook Pro 15 to quirks list for acp6x
  ASoC: tas2781: fixed register access error when switching to other chips
  ASoC: cs35l56: Add an ACPI match table
  ASoC: cs35l56: Read firmware uuid from a device property instead of _SUB
  ASoC: SOF: ipc4-pcm: fix possible null pointer deference
  MAINTAINERS: Add entries for TEXAS INSTRUMENTS ASoC DRIVERS
      ced5bf24
    • Tiezhu Yang's avatar
      LoongArch: Put the body of play_dead() into arch_cpu_idle_dead() · c337c849
      Tiezhu Yang authored 
      The initial aim is to silence the following objtool warning:

arch/loongarch/kernel/process.o: warning: objtool: arch_cpu_idle_dead() falls through to next function start_thread()

According to tools/objtool/Documentation/objtool.txt, this is because
the last instruction of arch_cpu_idle_dead() is a call to a noreturn
function play_dead(). In order to silence the warning, one simple way
is to add the noreturn function play_dead() to objtool's hard-coded
global_noreturns array, that is to say, just put "NORETURN(play_dead)"
into tools/objtool/noreturns.h, it works well.

But I noticed that play_dead() is only defined once and only called by
arch_cpu_idle_dead(), so put the body of play_dead() into the caller
arch_cpu_idle_dead(), then remove the noreturn function play_dead() is
an alternative way which can reduce the overhead of the function call
at the same time.
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      c337c849
    • Tiezhu Yang's avatar
      LoongArch: Add identifier names to arguments of die() declaration · 8879515e
      Tiezhu Yang authored 
      Add identifier names to arguments of die() declaration in ptrace.h
to fix the following checkpatch warnings:

  WARNING: function definition argument 'const char *' should also have an identifier name
  WARNING: function definition argument 'struct pt_regs *' should also have an identifier name
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      8879515e
    • Tiezhu Yang's avatar
      LoongArch: Return earlier in die() if notify_die() returns NOTIFY_STOP · a038ae71
      Tiezhu Yang authored 
      After the call to oops_exit(), it should not panic or execute
the crash kernel if the oops is to be suppressed.
Suggested-by: default avatarMaciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      a038ae71
    • Tiezhu Yang's avatar
      LoongArch: Do not kill the task in die() if notify_die() returns NOTIFY_STOP · 6933c11f
      Tiezhu Yang authored 
      If notify_die() returns NOTIFY_STOP, honor the return value from the
handler chain invocation in die() and return without killing the task
as, through a debugger, the fault may have been fixed. It makes sense
even if ignoring the event will make the system unstable: by allowing
access through a debugger it has been compromised already anyway. It
makes our port consistent with x86, arm64, riscv and csky.

Commit 20c0d2d4 ("[PATCH] i386: pass proper trap numbers to die
chain handlers") may be the earliest of similar changes.

Link: https://lore.kernel.org/r/43DDF02E.76F0.0078.0@novell.com/Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      6933c11f
    • Masahiro Yamada's avatar
      LoongArch: Remove <asm/export.h> · a746ceb1
      Masahiro Yamada authored 
      All *.S files under arch/loongarch/ have been converted to include
<linux/export.h> instead of <asm/export.h>.

Remove <asm/export.h>.
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      a746ceb1
    • Masahiro Yamada's avatar
      LoongArch: Replace #include <asm/export.h> with #include <linux/export.h> · 55b46ff9
      Masahiro Yamada authored 
      Commit ddb5cdba ("kbuild: generate KSYMTAB entries by modpost")
deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>.

Replace #include <asm/export.h> with #include <linux/export.h>.

After all the <asm/export.h> lines are converted, <asm/export.h> and
<asm-generic/export.h> will be removed.
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      55b46ff9
    • Masahiro Yamada's avatar
      LoongArch: Remove unneeded #include <asm/export.h> · 347aa8de
      Masahiro Yamada authored 
      There is no EXPORT_SYMBOL() line there, hence #include <asm/export.h>
is unneeded.
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      347aa8de
    • WANG Xuerui's avatar
      LoongArch: Replace -ffreestanding with finer-grained -fno-builtin's · 3f301dc2
      WANG Xuerui authored 
      As explained by Nick in the original issue: the kernel usually does a
good job of providing library helpers that have similar semantics as
their ordinary userspace libc equivalents, but -ffreestanding disables
such libcall optimization and other related features in the compiler,
which can lead to unexpected things such as CONFIG_FORTIFY_SOURCE not
working (!).

However, due to the desire for better control over unaligned accesses
with respect to CONFIG_ARCH_STRICT_ALIGN, and also for avoiding the
GCC bug https://gcc.gnu.org/PR109465, we do want to still disable
optimizations for the memory libcalls (memcpy, memmove and memset for
now). Use finer-grained -fno-builtin-* toggles to achieve this without
losing source fortification and other libcall optimizations.

Closes: https://github.com/ClangBuiltLinux/linux/issues/1897Reported-by: default avatarNathan Chancellor <nathan@kernel.org>
Suggested-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarWANG Xuerui <git@xen0n.name>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
      3f301dc2
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