Commit Graph

1367943 Commits

Author SHA1 Message Date
Namhyung Kim
317fa41b47 perf trace: Show zero value in STRARRAY
The STRARRAY macro is to print values in a pre-defined array.  But
sometimes it hides the value because it's 0.  The value of 0 can have a
meaning in this case so set 'show_zero' field.

For example, it can show CREATE_MAP cmd in the bpf syscall.

Acked-by: Howard Chu <howardchu95@gmail.com>
Link: https://lore.kernel.org/r/20250502204056.973977-1-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:50 -07:00
Sergei Trofimovich
c21986d33d perf unwind-libdw: skip non-regular files
Without the change `perf `hangs up on charaster devices. On my system
it's enough to run system-wide sampler for a few seconds to get the
hangup:

    $ perf record -a -g --call-graph=dwarf
    $ perf report
    # hung

`strace` shows that hangup happens on reading on a character device
`/dev/dri/renderD128`

    $ strace -y -f -p 2780484
    strace: Process 2780484 attached
    pread64(101</dev/dri/renderD128>, strace: Process 2780484 detached

It's call trace descends into `elfutils`:

    $ gdb -p 2780484
    (gdb) bt
    #0  0x00007f5e508f04b7 in __libc_pread64 (fd=101, buf=0x7fff9df7edb0, count=0, offset=0)
        at ../sysdeps/unix/sysv/linux/pread64.c:25
    #1  0x00007f5e52b79515 in read_file () from /<<NIX>>/elfutils-0.192/lib/libelf.so.1
    #2  0x00007f5e52b25666 in libdw_open_elf () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #3  0x00007f5e52b25907 in __libdw_open_file () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #4  0x00007f5e52b120a9 in dwfl_report_elf@@ELFUTILS_0.156 ()
       from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #5  0x000000000068bf20 in __report_module (al=al@entry=0x7fff9df80010, ip=ip@entry=139803237033216, ui=ui@entry=0x5369b5e0)
        at util/dso.h:537
    #6  0x000000000068c3d1 in report_module (ip=139803237033216, ui=0x5369b5e0) at util/unwind-libdw.c:114
    #7  frame_callback (state=0x535aef10, arg=0x5369b5e0) at util/unwind-libdw.c:242
    #8  0x00007f5e52b261d3 in dwfl_thread_getframes () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #9  0x00007f5e52b25bdb in get_one_thread_cb () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #10 0x00007f5e52b25faa in dwfl_getthreads () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #11 0x00007f5e52b26514 in dwfl_getthread_frames () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
    #12 0x000000000068c6ce in unwind__get_entries (cb=cb@entry=0x5d4620 <unwind_entry>, arg=arg@entry=0x10cd5fa0,
        thread=thread@entry=0x1076a290, data=data@entry=0x7fff9df80540, max_stack=max_stack@entry=127,
        best_effort=best_effort@entry=false) at util/thread.h:152
    #13 0x00000000005dae95 in thread__resolve_callchain_unwind (evsel=0x106006d0, thread=0x1076a290, cursor=0x10cd5fa0,
        sample=0x7fff9df80540, max_stack=127, symbols=true) at util/machine.c:2939
    #14 thread__resolve_callchain_unwind (thread=0x1076a290, cursor=0x10cd5fa0, evsel=0x106006d0, sample=0x7fff9df80540,
        max_stack=127, symbols=true) at util/machine.c:2920
    #15 __thread__resolve_callchain (thread=0x1076a290, cursor=0x10cd5fa0, evsel=0x106006d0, evsel@entry=0x7fff9df80440,
        sample=0x7fff9df80540, parent=parent@entry=0x7fff9df804a0, root_al=root_al@entry=0x7fff9df80440, max_stack=127, symbols=true)
        at util/machine.c:2970
    #16 0x00000000005d0cb2 in thread__resolve_callchain (thread=<optimized out>, cursor=<optimized out>, evsel=0x7fff9df80440,
        sample=<optimized out>, parent=0x7fff9df804a0, root_al=0x7fff9df80440, max_stack=127) at util/machine.h:198
    #17 sample__resolve_callchain (sample=<optimized out>, cursor=<optimized out>, parent=parent@entry=0x7fff9df804a0,
        evsel=evsel@entry=0x106006d0, al=al@entry=0x7fff9df80440, max_stack=max_stack@entry=127) at util/callchain.c:1127
    #18 0x0000000000617e08 in hist_entry_iter__add (iter=iter@entry=0x7fff9df80480, al=al@entry=0x7fff9df80440, max_stack_depth=127,
        arg=arg@entry=0x7fff9df81ae0) at util/hist.c:1255
    #19 0x000000000045d2d0 in process_sample_event (tool=0x7fff9df81ae0, event=<optimized out>, sample=0x7fff9df80540,
        evsel=0x106006d0, machine=<optimized out>) at builtin-report.c:334
    #20 0x00000000005e3bb1 in perf_session__deliver_event (session=0x105ff2c0, event=0x7f5c7d735ca0, tool=0x7fff9df81ae0,
        file_offset=2914716832, file_path=0x105ffbf0 "perf.data") at util/session.c:1367
    #21 0x00000000005e8d93 in do_flush (oe=0x105ffa50, show_progress=false) at util/ordered-events.c:245
    #22 __ordered_events__flush (oe=0x105ffa50, how=OE_FLUSH__ROUND, timestamp=<optimized out>) at util/ordered-events.c:324
    #23 0x00000000005e1f64 in perf_session__process_user_event (session=0x105ff2c0, event=0x7f5c7d752b18, file_offset=2914835224,
        file_path=0x105ffbf0 "perf.data") at util/session.c:1419
    #24 0x00000000005e47c7 in reader__read_event (rd=rd@entry=0x7fff9df81260, session=session@entry=0x105ff2c0,
    --Type <RET> for more, q to quit, c to continue without paging--
    quit
        prog=prog@entry=0x7fff9df81220) at util/session.c:2132
    #25 0x00000000005e4b37 in reader__process_events (rd=0x7fff9df81260, session=0x105ff2c0, prog=0x7fff9df81220)
        at util/session.c:2181
    #26 __perf_session__process_events (session=0x105ff2c0) at util/session.c:2226
    #27 perf_session__process_events (session=session@entry=0x105ff2c0) at util/session.c:2390
    #28 0x0000000000460add in __cmd_report (rep=0x7fff9df81ae0) at builtin-report.c:1076
    #29 cmd_report (argc=<optimized out>, argv=<optimized out>) at builtin-report.c:1827
    #30 0x00000000004c5a40 in run_builtin (p=p@entry=0xd8f7f8 <commands+312>, argc=argc@entry=1, argv=argv@entry=0x7fff9df844b0)
        at perf.c:351
    #31 0x00000000004c5d63 in handle_internal_command (argc=argc@entry=1, argv=argv@entry=0x7fff9df844b0) at perf.c:404
    #32 0x0000000000442de3 in run_argv (argcp=<synthetic pointer>, argv=<synthetic pointer>) at perf.c:448
    #33 main (argc=<optimized out>, argv=0x7fff9df844b0) at perf.c:556

The hangup happens because nothing in` perf` or `elfutils` checks if a
mapped file is easily readable.

The change conservatively skips all non-regular files.

Signed-off-by: Sergei Trofimovich <slyich@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20250505174419.2814857-1-slyich@gmail.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:50 -07:00
Arnaldo Carvalho de Melo
970ae86307 perf build: The bfd features are opt-in, stop testing for them by default
These are leftovers noticed while updating a build container.

We don't need those so that test-all.c can build and thus speed up the
feature detection.

Test for those features only if the user asks for BUILD_NONDISTRO=1 to
build with libbfd.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250620212435.93846-4-acme@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:50 -07:00
Arnaldo Carvalho de Melo
7c750d399b perf build: Add the libpfm devel fedora package name to the hint
Just to follow the pattern with other devel packages.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250620212435.93846-3-acme@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:50 -07:00
Arnaldo Carvalho de Melo
c335a4e927 perf build: Suggest java-latest-openjdk-devel instead of old 1.8.0 one
Just tidying up the suggestion to pick the latest and not some specific
version.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250620212435.93846-2-acme@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:49 -07:00
Ian Rogers
3317dc9ebd perf srcline: Lower verbosity on addr2line debug messages
Lower non-error debug messages to verbose 3 or larger.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250623161930.1421216-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24 10:27:49 -07:00
Namhyung Kim
c833e8cc4d Linux 6.16-rc3
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Merge tag 'v6.16-rc3' into perf-tools-next

To get the fixes in libbpf and perf tools.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-22 21:54:03 -07:00
Linus Torvalds
86731a2a65 Linux 6.16-rc3 2025-06-22 13:30:08 -07:00
Linus Torvalds
b67ec63901 i2c-for-6.16-rc3
- subsystem: convert drivers to use recent callbacks of struct i2c_algorithm
   A typical after-rc1 cleanup, which I couldn't send in time for rc2
 - tegra: fix YAML conversion of device tree bindings
 - k1: re-add a check which got lost during upstreaming
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Merge tag 'i2c-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:

 - subsystem: convert drivers to use recent callbacks of struct
   i2c_algorithm A typical after-rc1 cleanup, which I couldn't send in
   time for rc2

 - tegra: fix YAML conversion of device tree bindings

 - k1: re-add a check which got lost during upstreaming

* tag 'i2c-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: k1: check for transfer error
  i2c: use inclusive callbacks in struct i2c_algorithm
  dt-bindings: i2c: nvidia,tegra20-i2c: Specify the required properties
2025-06-22 10:50:36 -07:00
Linus Torvalds
5c00eca95a - Make sure the array tracking which kernel text positions need to be
alternatives-patched doesn't get mishandled by out-of-order modifications,
   leading to it overflowing and causing page faults when patching
 
 - Avoid an infinite loop when early code does a ranged TLB invalidation before
   the broadcast TLB invalidation count of how many pages it can flush, has
   been read from CPUID
 
 - Fix a CONFIG_MODULES typo
 
 - Disable broadcast TLB invalidation when PTI is enabled to avoid an overflow
   of the bitmap tracking dynamic ASIDs which need to be flushed when the
   kernel switches between the user and kernel address space
 
 - Handle the case of a CPU going offline and thus reporting zeroes when
   reading top-level events in the resctrl code
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Merge tag 'x86_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Make sure the array tracking which kernel text positions need to be
   alternatives-patched doesn't get mishandled by out-of-order
   modifications, leading to it overflowing and causing page faults when
   patching

 - Avoid an infinite loop when early code does a ranged TLB invalidation
   before the broadcast TLB invalidation count of how many pages it can
   flush, has been read from CPUID

 - Fix a CONFIG_MODULES typo

 - Disable broadcast TLB invalidation when PTI is enabled to avoid an
   overflow of the bitmap tracking dynamic ASIDs which need to be
   flushed when the kernel switches between the user and kernel address
   space

 - Handle the case of a CPU going offline and thus reporting zeroes when
   reading top-level events in the resctrl code

* tag 'x86_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/alternatives: Fix int3 handling failure from broken text_poke array
  x86/mm: Fix early boot use of INVPLGB
  x86/its: Fix an ifdef typo in its_alloc()
  x86/mm: Disable INVLPGB when PTI is enabled
  x86,fs/resctrl: Remove inappropriate references to cacheinfo in the resctrl subsystem
2025-06-22 10:30:44 -07:00
Linus Torvalds
33efa7dbab - Fix missing prototypes warnings
- Properly initialize work context when allocating it
 
 - Remove a method tracking when managed interrupts are suspended during
   hotplug, in favor of the code using a IRQ disable depth tracking now,
   and have interrupts get properly enabled again on restore
 
 - Make sure multiple CPUs getting hotplugged don't cause wrong tracking of the
   managed IRQ disable depth
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Merge tag 'irq_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fixes from Borislav Petkov:

 - Fix missing prototypes warnings

 - Properly initialize work context when allocating it

 - Remove a method tracking when managed interrupts are suspended during
   hotplug, in favor of the code using a IRQ disable depth tracking now,
   and have interrupts get properly enabled again on restore

 - Make sure multiple CPUs getting hotplugged don't cause wrong tracking
   of the managed IRQ disable depth

* tag 'irq_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/ath79-misc: Fix missing prototypes warnings
  genirq/irq_sim: Initialize work context pointers properly
  genirq/cpuhotplug: Restore affinity even for suspended IRQ
  genirq/cpuhotplug: Rebalance managed interrupts across multi-CPU hotplug
2025-06-22 10:17:51 -07:00
Linus Torvalds
17ef32ae66 - Avoid a crash on a heterogeneous machine where not all cores support the
same hw events features
 
 - Avoid a deadlock when throttling events
 
 - Document the perf event states more
 
 - Make sure a number of perf paths switching off or rescheduling events call
   perf_cgroup_event_disable()
 
 - Make sure perf does task sampling before its userspace mapping is torn down,
   and not after
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Merge tag 'perf_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Avoid a crash on a heterogeneous machine where not all cores support
   the same hw events features

 - Avoid a deadlock when throttling events

 - Document the perf event states more

 - Make sure a number of perf paths switching off or rescheduling events
   call perf_cgroup_event_disable()

 - Make sure perf does task sampling before its userspace mapping is
   torn down, and not after

* tag 'perf_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Fix crash in icl_update_topdown_event()
  perf: Fix the throttle error of some clock events
  perf: Add comment to enum perf_event_state
  perf/core: Fix WARN in perf_cgroup_switch()
  perf: Fix dangling cgroup pointer in cpuctx
  perf: Fix cgroup state vs ERROR
  perf: Fix sample vs do_exit()
2025-06-22 10:11:45 -07:00
Linus Torvalds
aff2a7e23f - Make sure the switch to the global hash is requested always under a lock so
that two threads requesting that simultaneously cannot get to inconsistent
   state
 
 - Reject negative NUMA nodes earlier in the futex NUMA interface handling code
 
 - Selftests fixes
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Merge tag 'locking_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fixes from Borislav Petkov:

 - Make sure the switch to the global hash is requested always under a
   lock so that two threads requesting that simultaneously cannot get to
   inconsistent state

 - Reject negative NUMA nodes earlier in the futex NUMA interface
   handling code

 - Selftests fixes

* tag 'locking_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Verify under the lock if hash can be replaced
  futex: Handle invalid node numbers supplied by user
  selftests/futex: Set the home_node in futex_numa_mpol
  selftests/futex: getopt() requires int as return value.
2025-06-22 10:09:23 -07:00
Linus Torvalds
73543bad76 - amd64: Correct the number of memory controllers on some AMD Zen clients
- igen6: Handle firmware-disabled memory controllers properly
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Merge tag 'edac_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull EDAC fixes from Borislav Petkov:

 - amd64: Correct the number of memory controllers on some AMD Zen
   clients

 - igen6: Handle firmware-disabled memory controllers properly

* tag 'edac_urgent_for_v6.16_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/igen6: Fix NULL pointer dereference
  EDAC/amd64: Correct number of UMCs for family 19h models 70h-7fh
2025-06-22 10:05:33 -07:00
Linus Torvalds
e669e322c5 ARM:
- Fix another set of FP/SIMD/SVE bugs affecting NV, and plugging some
   missing synchronisation
 
 - A small fix for the irqbypass hook fixes, tightening the check and
   ensuring that we only deal with MSI for both the old and the new
   route entry
 
 - Rework the way the shadow LRs are addressed in a nesting
   configuration, plugging an embarrassing bug as well as simplifying
   the whole process
 
 - Add yet another fix for the dreaded arch_timer_edge_cases selftest
 
 RISC-V:
 
 - Fix the size parameter check in SBI SFENCE calls
 
 - Don't treat SBI HFENCE calls as NOPs
 
 x86 TDX:
 
 - Complete API for handling complex TDVMCALLs in userspace.  This was
   delayed because the spec lacked a way for userspace to deny supporting
   these calls; the new exit code is now approved.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "ARM:

   - Fix another set of FP/SIMD/SVE bugs affecting NV, and plugging some
     missing synchronisation

   - A small fix for the irqbypass hook fixes, tightening the check and
     ensuring that we only deal with MSI for both the old and the new
     route entry

   - Rework the way the shadow LRs are addressed in a nesting
     configuration, plugging an embarrassing bug as well as simplifying
     the whole process

   - Add yet another fix for the dreaded arch_timer_edge_cases selftest

  RISC-V:

   - Fix the size parameter check in SBI SFENCE calls

   - Don't treat SBI HFENCE calls as NOPs

  x86 TDX:

   - Complete API for handling complex TDVMCALLs in userspace.

     This was delayed because the spec lacked a way for userspace to
     deny supporting these calls; the new exit code is now approved"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: TDX: Exit to userspace for GetTdVmCallInfo
  KVM: TDX: Handle TDG.VP.VMCALL<GetQuote>
  KVM: TDX: Add new TDVMCALL status code for unsupported subfuncs
  KVM: arm64: VHE: Centralize ISBs when returning to host
  KVM: arm64: Remove cpacr_clear_set()
  KVM: arm64: Remove ad-hoc CPTR manipulation from kvm_hyp_handle_fpsimd()
  KVM: arm64: Remove ad-hoc CPTR manipulation from fpsimd_sve_sync()
  KVM: arm64: Reorganise CPTR trap manipulation
  KVM: arm64: VHE: Synchronize CPTR trap deactivation
  KVM: arm64: VHE: Synchronize restore of host debug registers
  KVM: arm64: selftests: Close the GIC FD in arch_timer_edge_cases
  KVM: arm64: Explicitly treat routing entry type changes as changes
  KVM: arm64: nv: Fix tracking of shadow list registers
  RISC-V: KVM: Don't treat SBI HFENCE calls as NOPs
  RISC-V: KVM: Fix the size parameter check in SBI SFENCE calls
2025-06-22 09:58:23 -07:00
Linus Torvalds
75f99f8cf4 nine smb3 client fixes
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Merge tag 'v6.16-rc2-smb3-client-fixes-v2' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fixes from Steve French:

 - Multichannel channel allocation fix for Kerberos mounts

 - Two reconnect fixes

 - Fix netfs_writepages crash with smbdirect/RDMA

 - Directory caching fix

 - Three minor cleanup fixes

 - Log error when close cached dirs fails

* tag 'v6.16-rc2-smb3-client-fixes-v2' of git://git.samba.org/sfrench/cifs-2.6:
  smb: minor fix to use SMB2_NTLMV2_SESSKEY_SIZE for auth_key size
  smb: minor fix to use sizeof to initialize flags_string buffer
  smb: Use loff_t for directory position in cached_dirents
  smb: Log an error when close_all_cached_dirs fails
  cifs: Fix prepare_write to negotiate wsize if needed
  smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma()
  smb: client: fix first command failure during re-negotiation
  cifs: Remove duplicate fattr->cf_dtype assignment from wsl_to_fattr() function
  smb: fix secondary channel creation issue with kerberos by populating hostname when adding channels
2025-06-22 09:46:11 -07:00
Alex Elder
a6c23dac75 i2c: k1: check for transfer error
If spacemit_i2c_xfer_msg() times out waiting for a message transfer to
complete, or if the hardware reports an error, it returns a negative
error code (-ETIMEDOUT, -EAGAIN, -ENXIO. or -EIO).

The sole caller of spacemit_i2c_xfer_msg() is spacemit_i2c_xfer(),
which is the i2c_algorithm->xfer callback function.  It currently
does not save the value returned by spacemit_i2c_xfer_msg().

The result is that transfer errors go unreported, and a caller
has no indication anything is wrong.

When this code was out for review, the return value *was* checked
in early versions.  But for some reason, that assignment got dropped
between versions 5 and 6 of the series, perhaps related to reworking
the code to merge spacemit_i2c_xfer_core() into spacemit_i2c_xfer().

Simply assigning the value returned to "ret" fixes the problem.

Fixes: 5ea558473f ("i2c: spacemit: add support for SpacemiT K1 SoC")
Signed-off-by: Alex Elder <elder@riscstar.com>
Cc: <stable@vger.kernel.org> # v6.15+
Reviewed-by: Troy Mitchell <troymitchell988@gmail.com>
Link: https://lore.kernel.org/r/20250616125137.1555453-1-elder@riscstar.com
Signed-off-by: Andi Shyti <andi@smida.it>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2025-06-21 22:17:02 +02:00
Linus Torvalds
739a6c93cc nfsd-6.16 fixes:
- Two fixes for commits in the nfsd-6.16 merge
 - One fix for the recently-added NFSD netlink facility
 - One fix for a remote SunRPC crasher
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Merge tag 'nfsd-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Two fixes for commits in the nfsd-6.16 merge

 - One fix for the recently-added NFSD netlink facility

 - One fix for a remote SunRPC crasher

* tag 'nfsd-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  sunrpc: handle SVC_GARBAGE during svc auth processing as auth error
  nfsd: use threads array as-is in netlink interface
  SUNRPC: Cleanup/fix initial rq_pages allocation
  NFSD: Avoid corruption of a referring call list
2025-06-21 09:20:15 -07:00
Linus Torvalds
1f9378d4a7 Changes since the last update:
- Use the mounter’s credentials for file-backed mounts to resolve
    Android SELinux permission issues;
 
  - Remove the unused trace event `erofs_destroy_inode`;
 
  - Error out on crafted out-of-file-range encoded extents;
 
  - Remove an incorrect check for encoded extents.
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Merge tag 'erofs-for-6.16-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs fixes from Gao Xiang:

 - Use the mounter’s credentials for file-backed mounts to resolve
   Android SELinux permission issues

 - Remove the unused trace event `erofs_destroy_inode`

 - Error out on crafted out-of-file-range encoded extents

 - Remove an incorrect check for encoded extents

* tag 'erofs-for-6.16-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: remove a superfluous check for encoded extents
  erofs: refuse crafted out-of-file-range encoded extents
  erofs: remove unused trace event erofs_destroy_inode
  erofs: impersonate the opener's credentials when accessing backing file
2025-06-21 09:15:08 -07:00
Bharath SM
27e9d5d021 smb: minor fix to use SMB2_NTLMV2_SESSKEY_SIZE for auth_key size
Replaced hardcoded value 16 with SMB2_NTLMV2_SESSKEY_SIZE
in the auth_key definition and memcpy call.

Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:25 -05:00
Bharath SM
4d360cfe8c smb: minor fix to use sizeof to initialize flags_string buffer
Replaced hardcoded length with sizeof(flags_string).

Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:25 -05:00
Bharath SM
4eb11a34b7 smb: Use loff_t for directory position in cached_dirents
Change the pos field in struct cached_dirents from int to loff_t
to support large directory offsets. This avoids overflow and
matches kernel conventions for directory positions.

Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:25 -05:00
Paul Aurich
a2182743a8 smb: Log an error when close_all_cached_dirs fails
Under low-memory conditions, close_all_cached_dirs() can't move the
dentries to a separate list to dput() them once the locks are dropped.
This will result in a "Dentry still in use" error, so add an error
message that makes it clear this is what happened:

[  495.281119] CIFS: VFS: \\otters.example.com\share Out of memory while dropping dentries
[  495.281595] ------------[ cut here ]------------
[  495.281887] BUG: Dentry ffff888115531138{i=78,n=/}  still in use (2) [unmount of cifs cifs]
[  495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0

Also, bail out of looping through all tcons as soon as a single
allocation fails, since we're already in trouble, and kmalloc() attempts
for subseqeuent tcons are likely to fail just like the first one did.

Signed-off-by: Paul Aurich <paul@darkrain42.org>
Acked-by: Bharath SM <bharathsm@microsoft.com>
Suggested-by: Ruben Devos <rdevos@oxya.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:25 -05:00
David Howells
2c4fd3d141 cifs: Fix prepare_write to negotiate wsize if needed
Fix cifs_prepare_write() to negotiate the wsize if it is unset.

Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
Reviewed-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paulo Alcantara <pc@manguebit.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:24 -05:00
Stefan Metzmacher
a379a8a2a0 smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma()
This fixes the following problem:

[  749.901015] [   T8673] run fstests cifs/001 at 2025-06-17 09:40:30
[  750.346409] [   T9870] ==================================================================
[  750.346814] [   T9870] BUG: KASAN: slab-out-of-bounds in smb_set_sge+0x2cc/0x3b0 [cifs]
[  750.347330] [   T9870] Write of size 8 at addr ffff888011082890 by task xfs_io/9870
[  750.347705] [   T9870]
[  750.348077] [   T9870] CPU: 0 UID: 0 PID: 9870 Comm: xfs_io Kdump: loaded Not tainted 6.16.0-rc2-metze.02+ #1 PREEMPT(voluntary)
[  750.348082] [   T9870] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[  750.348085] [   T9870] Call Trace:
[  750.348086] [   T9870]  <TASK>
[  750.348088] [   T9870]  dump_stack_lvl+0x76/0xa0
[  750.348106] [   T9870]  print_report+0xd1/0x640
[  750.348116] [   T9870]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[  750.348120] [   T9870]  ? kasan_complete_mode_report_info+0x26/0x210
[  750.348124] [   T9870]  kasan_report+0xe7/0x130
[  750.348128] [   T9870]  ? smb_set_sge+0x2cc/0x3b0 [cifs]
[  750.348262] [   T9870]  ? smb_set_sge+0x2cc/0x3b0 [cifs]
[  750.348377] [   T9870]  __asan_report_store8_noabort+0x17/0x30
[  750.348381] [   T9870]  smb_set_sge+0x2cc/0x3b0 [cifs]
[  750.348496] [   T9870]  smbd_post_send_iter+0x1990/0x3070 [cifs]
[  750.348625] [   T9870]  ? __pfx_smbd_post_send_iter+0x10/0x10 [cifs]
[  750.348741] [   T9870]  ? update_stack_state+0x2a0/0x670
[  750.348749] [   T9870]  ? cifs_flush+0x153/0x320 [cifs]
[  750.348870] [   T9870]  ? cifs_flush+0x153/0x320 [cifs]
[  750.348990] [   T9870]  ? update_stack_state+0x2a0/0x670
[  750.348995] [   T9870]  smbd_send+0x58c/0x9c0 [cifs]
[  750.349117] [   T9870]  ? __pfx_smbd_send+0x10/0x10 [cifs]
[  750.349231] [   T9870]  ? unwind_get_return_address+0x65/0xb0
[  750.349235] [   T9870]  ? __pfx_stack_trace_consume_entry+0x10/0x10
[  750.349242] [   T9870]  ? arch_stack_walk+0xa7/0x100
[  750.349250] [   T9870]  ? stack_trace_save+0x92/0xd0
[  750.349254] [   T9870]  __smb_send_rqst+0x931/0xec0 [cifs]
[  750.349374] [   T9870]  ? kernel_text_address+0x173/0x190
[  750.349379] [   T9870]  ? kasan_save_stack+0x39/0x70
[  750.349382] [   T9870]  ? kasan_save_track+0x18/0x70
[  750.349385] [   T9870]  ? __kasan_slab_alloc+0x9d/0xa0
[  750.349389] [   T9870]  ? __pfx___smb_send_rqst+0x10/0x10 [cifs]
[  750.349508] [   T9870]  ? smb2_mid_entry_alloc+0xb4/0x7e0 [cifs]
[  750.349626] [   T9870]  ? cifs_call_async+0x277/0xb00 [cifs]
[  750.349746] [   T9870]  ? cifs_issue_write+0x256/0x610 [cifs]
[  750.349867] [   T9870]  ? netfs_do_issue_write+0xc2/0x340 [netfs]
[  750.349900] [   T9870]  ? netfs_advance_write+0x45b/0x1270 [netfs]
[  750.349929] [   T9870]  ? netfs_write_folio+0xd6c/0x1be0 [netfs]
[  750.349958] [   T9870]  ? netfs_writepages+0x2e9/0xa80 [netfs]
[  750.349987] [   T9870]  ? do_writepages+0x21f/0x590
[  750.349993] [   T9870]  ? filemap_fdatawrite_wbc+0xe1/0x140
[  750.349997] [   T9870]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.350002] [   T9870]  smb_send_rqst+0x22e/0x2f0 [cifs]
[  750.350131] [   T9870]  ? __pfx_smb_send_rqst+0x10/0x10 [cifs]
[  750.350255] [   T9870]  ? local_clock_noinstr+0xe/0xd0
[  750.350261] [   T9870]  ? kasan_save_alloc_info+0x37/0x60
[  750.350268] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.350271] [   T9870]  ? _raw_spin_lock+0x81/0xf0
[  750.350275] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.350278] [   T9870]  ? smb2_setup_async_request+0x293/0x580 [cifs]
[  750.350398] [   T9870]  cifs_call_async+0x477/0xb00 [cifs]
[  750.350518] [   T9870]  ? __pfx_smb2_writev_callback+0x10/0x10 [cifs]
[  750.350636] [   T9870]  ? __pfx_cifs_call_async+0x10/0x10 [cifs]
[  750.350756] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.350760] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.350763] [   T9870]  ? __smb2_plain_req_init+0x933/0x1090 [cifs]
[  750.350891] [   T9870]  smb2_async_writev+0x15ff/0x2460 [cifs]
[  750.351008] [   T9870]  ? sched_clock_noinstr+0x9/0x10
[  750.351012] [   T9870]  ? local_clock_noinstr+0xe/0xd0
[  750.351018] [   T9870]  ? __pfx_smb2_async_writev+0x10/0x10 [cifs]
[  750.351144] [   T9870]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[  750.351150] [   T9870]  ? _raw_spin_unlock+0xe/0x40
[  750.351154] [   T9870]  ? cifs_pick_channel+0x242/0x370 [cifs]
[  750.351275] [   T9870]  cifs_issue_write+0x256/0x610 [cifs]
[  750.351554] [   T9870]  ? cifs_issue_write+0x256/0x610 [cifs]
[  750.351677] [   T9870]  netfs_do_issue_write+0xc2/0x340 [netfs]
[  750.351710] [   T9870]  netfs_advance_write+0x45b/0x1270 [netfs]
[  750.351740] [   T9870]  ? rolling_buffer_append+0x12d/0x440 [netfs]
[  750.351769] [   T9870]  netfs_write_folio+0xd6c/0x1be0 [netfs]
[  750.351798] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.351804] [   T9870]  netfs_writepages+0x2e9/0xa80 [netfs]
[  750.351835] [   T9870]  ? __pfx_netfs_writepages+0x10/0x10 [netfs]
[  750.351864] [   T9870]  ? exit_files+0xab/0xe0
[  750.351867] [   T9870]  ? do_exit+0x148f/0x2980
[  750.351871] [   T9870]  ? do_group_exit+0xb5/0x250
[  750.351874] [   T9870]  ? arch_do_signal_or_restart+0x92/0x630
[  750.351879] [   T9870]  ? exit_to_user_mode_loop+0x98/0x170
[  750.351882] [   T9870]  ? do_syscall_64+0x2cf/0xd80
[  750.351886] [   T9870]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.351890] [   T9870]  do_writepages+0x21f/0x590
[  750.351894] [   T9870]  ? __pfx_do_writepages+0x10/0x10
[  750.351897] [   T9870]  filemap_fdatawrite_wbc+0xe1/0x140
[  750.351901] [   T9870]  __filemap_fdatawrite_range+0xba/0x100
[  750.351904] [   T9870]  ? __pfx___filemap_fdatawrite_range+0x10/0x10
[  750.351912] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.351916] [   T9870]  filemap_write_and_wait_range+0x7d/0xf0
[  750.351920] [   T9870]  cifs_flush+0x153/0x320 [cifs]
[  750.352042] [   T9870]  filp_flush+0x107/0x1a0
[  750.352046] [   T9870]  filp_close+0x14/0x30
[  750.352049] [   T9870]  put_files_struct.part.0+0x126/0x2a0
[  750.352053] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.352058] [   T9870]  exit_files+0xab/0xe0
[  750.352061] [   T9870]  do_exit+0x148f/0x2980
[  750.352065] [   T9870]  ? __pfx_do_exit+0x10/0x10
[  750.352069] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.352072] [   T9870]  ? _raw_spin_lock_irq+0x8a/0xf0
[  750.352076] [   T9870]  do_group_exit+0xb5/0x250
[  750.352080] [   T9870]  get_signal+0x22d3/0x22e0
[  750.352086] [   T9870]  ? __pfx_get_signal+0x10/0x10
[  750.352089] [   T9870]  ? fpregs_assert_state_consistent+0x68/0x100
[  750.352101] [   T9870]  ? folio_add_lru+0xda/0x120
[  750.352105] [   T9870]  arch_do_signal_or_restart+0x92/0x630
[  750.352109] [   T9870]  ? __pfx_arch_do_signal_or_restart+0x10/0x10
[  750.352115] [   T9870]  exit_to_user_mode_loop+0x98/0x170
[  750.352118] [   T9870]  do_syscall_64+0x2cf/0xd80
[  750.352123] [   T9870]  ? __kasan_check_read+0x11/0x20
[  750.352126] [   T9870]  ? count_memcg_events+0x1b4/0x420
[  750.352132] [   T9870]  ? handle_mm_fault+0x148/0x690
[  750.352136] [   T9870]  ? _raw_spin_lock_irq+0x8a/0xf0
[  750.352140] [   T9870]  ? __kasan_check_read+0x11/0x20
[  750.352143] [   T9870]  ? fpregs_assert_state_consistent+0x68/0x100
[  750.352146] [   T9870]  ? irqentry_exit_to_user_mode+0x2e/0x250
[  750.352151] [   T9870]  ? irqentry_exit+0x43/0x50
[  750.352154] [   T9870]  ? exc_page_fault+0x75/0xe0
[  750.352160] [   T9870]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.352163] [   T9870] RIP: 0033:0x7858c94ab6e2
[  750.352167] [   T9870] Code: Unable to access opcode bytes at 0x7858c94ab6b8.
[  750.352175] [   T9870] RSP: 002b:00007858c9248ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000022
[  750.352179] [   T9870] RAX: fffffffffffffdfe RBX: 00007858c92496c0 RCX: 00007858c94ab6e2
[  750.352182] [   T9870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[  750.352184] [   T9870] RBP: 00007858c9248d10 R08: 0000000000000000 R09: 0000000000000000
[  750.352185] [   T9870] R10: 0000000000000000 R11: 0000000000000246 R12: fffffffffffffde0
[  750.352187] [   T9870] R13: 0000000000000020 R14: 0000000000000002 R15: 00007ffc072d2230
[  750.352191] [   T9870]  </TASK>
[  750.352195] [   T9870]
[  750.395206] [   T9870] Allocated by task 9870 on cpu 0 at 750.346406s:
[  750.395523] [   T9870]  kasan_save_stack+0x39/0x70
[  750.395532] [   T9870]  kasan_save_track+0x18/0x70
[  750.395536] [   T9870]  kasan_save_alloc_info+0x37/0x60
[  750.395539] [   T9870]  __kasan_slab_alloc+0x9d/0xa0
[  750.395543] [   T9870]  kmem_cache_alloc_noprof+0x13c/0x3f0
[  750.395548] [   T9870]  mempool_alloc_slab+0x15/0x20
[  750.395553] [   T9870]  mempool_alloc_noprof+0x135/0x340
[  750.395557] [   T9870]  smbd_post_send_iter+0x63e/0x3070 [cifs]
[  750.395694] [   T9870]  smbd_send+0x58c/0x9c0 [cifs]
[  750.395819] [   T9870]  __smb_send_rqst+0x931/0xec0 [cifs]
[  750.395950] [   T9870]  smb_send_rqst+0x22e/0x2f0 [cifs]
[  750.396081] [   T9870]  cifs_call_async+0x477/0xb00 [cifs]
[  750.396232] [   T9870]  smb2_async_writev+0x15ff/0x2460 [cifs]
[  750.396359] [   T9870]  cifs_issue_write+0x256/0x610 [cifs]
[  750.396492] [   T9870]  netfs_do_issue_write+0xc2/0x340 [netfs]
[  750.396544] [   T9870]  netfs_advance_write+0x45b/0x1270 [netfs]
[  750.396576] [   T9870]  netfs_write_folio+0xd6c/0x1be0 [netfs]
[  750.396608] [   T9870]  netfs_writepages+0x2e9/0xa80 [netfs]
[  750.396639] [   T9870]  do_writepages+0x21f/0x590
[  750.396643] [   T9870]  filemap_fdatawrite_wbc+0xe1/0x140
[  750.396647] [   T9870]  __filemap_fdatawrite_range+0xba/0x100
[  750.396651] [   T9870]  filemap_write_and_wait_range+0x7d/0xf0
[  750.396656] [   T9870]  cifs_flush+0x153/0x320 [cifs]
[  750.396787] [   T9870]  filp_flush+0x107/0x1a0
[  750.396791] [   T9870]  filp_close+0x14/0x30
[  750.396795] [   T9870]  put_files_struct.part.0+0x126/0x2a0
[  750.396800] [   T9870]  exit_files+0xab/0xe0
[  750.396803] [   T9870]  do_exit+0x148f/0x2980
[  750.396808] [   T9870]  do_group_exit+0xb5/0x250
[  750.396813] [   T9870]  get_signal+0x22d3/0x22e0
[  750.396817] [   T9870]  arch_do_signal_or_restart+0x92/0x630
[  750.396822] [   T9870]  exit_to_user_mode_loop+0x98/0x170
[  750.396827] [   T9870]  do_syscall_64+0x2cf/0xd80
[  750.396832] [   T9870]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.396836] [   T9870]
[  750.397150] [   T9870] The buggy address belongs to the object at ffff888011082800
                           which belongs to the cache smbd_request_0000000008f3bd7b of size 144
[  750.397798] [   T9870] The buggy address is located 0 bytes to the right of
                           allocated 144-byte region [ffff888011082800, ffff888011082890)
[  750.398469] [   T9870]
[  750.398800] [   T9870] The buggy address belongs to the physical page:
[  750.399141] [   T9870] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11082
[  750.399148] [   T9870] flags: 0xfffffc0000000(node=0|zone=1|lastcpupid=0x1fffff)
[  750.399155] [   T9870] page_type: f5(slab)
[  750.399161] [   T9870] raw: 000fffffc0000000 ffff888022d65640 dead000000000122 0000000000000000
[  750.399165] [   T9870] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
[  750.399169] [   T9870] page dumped because: kasan: bad access detected
[  750.399172] [   T9870]
[  750.399505] [   T9870] Memory state around the buggy address:
[  750.399863] [   T9870]  ffff888011082780: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  750.400247] [   T9870]  ffff888011082800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  750.400618] [   T9870] >ffff888011082880: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  750.400982] [   T9870]                          ^
[  750.401370] [   T9870]  ffff888011082900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  750.401774] [   T9870]  ffff888011082980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  750.402171] [   T9870] ==================================================================
[  750.402696] [   T9870] Disabling lock debugging due to kernel taint
[  750.403202] [   T9870] BUG: unable to handle page fault for address: ffff8880110a2000
[  750.403797] [   T9870] #PF: supervisor write access in kernel mode
[  750.404204] [   T9870] #PF: error_code(0x0003) - permissions violation
[  750.404581] [   T9870] PGD 5ce01067 P4D 5ce01067 PUD 5ce02067 PMD 78aa063 PTE 80000000110a2021
[  750.404969] [   T9870] Oops: Oops: 0003 [#1] SMP KASAN PTI
[  750.405394] [   T9870] CPU: 0 UID: 0 PID: 9870 Comm: xfs_io Kdump: loaded Tainted: G    B               6.16.0-rc2-metze.02+ #1 PREEMPT(voluntary)
[  750.406510] [   T9870] Tainted: [B]=BAD_PAGE
[  750.406967] [   T9870] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[  750.407440] [   T9870] RIP: 0010:smb_set_sge+0x15c/0x3b0 [cifs]
[  750.408065] [   T9870] Code: 48 83 f8 ff 0f 84 b0 00 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 e1 48 c1 e9 03 80 3c 11 00 0f 85 69 01 00 00 49 8d 7c 24 08 <49> 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f
[  750.409283] [   T9870] RSP: 0018:ffffc90005e2e758 EFLAGS: 00010246
[  750.409803] [   T9870] RAX: ffff888036c53400 RBX: ffffc90005e2e878 RCX: 1ffff11002214400
[  750.410323] [   T9870] RDX: dffffc0000000000 RSI: dffffc0000000000 RDI: ffff8880110a2008
[  750.411217] [   T9870] RBP: ffffc90005e2e798 R08: 0000000000000001 R09: 0000000000000400
[  750.411770] [   T9870] R10: ffff888011082800 R11: 0000000000000000 R12: ffff8880110a2000
[  750.412325] [   T9870] R13: 0000000000000000 R14: ffffc90005e2e888 R15: ffff88801a4b6000
[  750.412901] [   T9870] FS:  0000000000000000(0000) GS:ffff88812bc68000(0000) knlGS:0000000000000000
[  750.413477] [   T9870] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  750.414077] [   T9870] CR2: ffff8880110a2000 CR3: 000000005b0a6005 CR4: 00000000000726f0
[  750.414654] [   T9870] Call Trace:
[  750.415211] [   T9870]  <TASK>
[  750.415748] [   T9870]  smbd_post_send_iter+0x1990/0x3070 [cifs]
[  750.416449] [   T9870]  ? __pfx_smbd_post_send_iter+0x10/0x10 [cifs]
[  750.417128] [   T9870]  ? update_stack_state+0x2a0/0x670
[  750.417685] [   T9870]  ? cifs_flush+0x153/0x320 [cifs]
[  750.418380] [   T9870]  ? cifs_flush+0x153/0x320 [cifs]
[  750.419055] [   T9870]  ? update_stack_state+0x2a0/0x670
[  750.419624] [   T9870]  smbd_send+0x58c/0x9c0 [cifs]
[  750.420297] [   T9870]  ? __pfx_smbd_send+0x10/0x10 [cifs]
[  750.420936] [   T9870]  ? unwind_get_return_address+0x65/0xb0
[  750.421456] [   T9870]  ? __pfx_stack_trace_consume_entry+0x10/0x10
[  750.421954] [   T9870]  ? arch_stack_walk+0xa7/0x100
[  750.422460] [   T9870]  ? stack_trace_save+0x92/0xd0
[  750.422948] [   T9870]  __smb_send_rqst+0x931/0xec0 [cifs]
[  750.423579] [   T9870]  ? kernel_text_address+0x173/0x190
[  750.424056] [   T9870]  ? kasan_save_stack+0x39/0x70
[  750.424813] [   T9870]  ? kasan_save_track+0x18/0x70
[  750.425323] [   T9870]  ? __kasan_slab_alloc+0x9d/0xa0
[  750.425831] [   T9870]  ? __pfx___smb_send_rqst+0x10/0x10 [cifs]
[  750.426548] [   T9870]  ? smb2_mid_entry_alloc+0xb4/0x7e0 [cifs]
[  750.427231] [   T9870]  ? cifs_call_async+0x277/0xb00 [cifs]
[  750.427882] [   T9870]  ? cifs_issue_write+0x256/0x610 [cifs]
[  750.428909] [   T9870]  ? netfs_do_issue_write+0xc2/0x340 [netfs]
[  750.429425] [   T9870]  ? netfs_advance_write+0x45b/0x1270 [netfs]
[  750.429882] [   T9870]  ? netfs_write_folio+0xd6c/0x1be0 [netfs]
[  750.430345] [   T9870]  ? netfs_writepages+0x2e9/0xa80 [netfs]
[  750.430809] [   T9870]  ? do_writepages+0x21f/0x590
[  750.431239] [   T9870]  ? filemap_fdatawrite_wbc+0xe1/0x140
[  750.431652] [   T9870]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.432041] [   T9870]  smb_send_rqst+0x22e/0x2f0 [cifs]
[  750.432586] [   T9870]  ? __pfx_smb_send_rqst+0x10/0x10 [cifs]
[  750.433108] [   T9870]  ? local_clock_noinstr+0xe/0xd0
[  750.433482] [   T9870]  ? kasan_save_alloc_info+0x37/0x60
[  750.433855] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.434214] [   T9870]  ? _raw_spin_lock+0x81/0xf0
[  750.434561] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.434903] [   T9870]  ? smb2_setup_async_request+0x293/0x580 [cifs]
[  750.435394] [   T9870]  cifs_call_async+0x477/0xb00 [cifs]
[  750.435892] [   T9870]  ? __pfx_smb2_writev_callback+0x10/0x10 [cifs]
[  750.436388] [   T9870]  ? __pfx_cifs_call_async+0x10/0x10 [cifs]
[  750.436881] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.437237] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.437579] [   T9870]  ? __smb2_plain_req_init+0x933/0x1090 [cifs]
[  750.438062] [   T9870]  smb2_async_writev+0x15ff/0x2460 [cifs]
[  750.438557] [   T9870]  ? sched_clock_noinstr+0x9/0x10
[  750.438906] [   T9870]  ? local_clock_noinstr+0xe/0xd0
[  750.439293] [   T9870]  ? __pfx_smb2_async_writev+0x10/0x10 [cifs]
[  750.439786] [   T9870]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[  750.440143] [   T9870]  ? _raw_spin_unlock+0xe/0x40
[  750.440495] [   T9870]  ? cifs_pick_channel+0x242/0x370 [cifs]
[  750.440989] [   T9870]  cifs_issue_write+0x256/0x610 [cifs]
[  750.441492] [   T9870]  ? cifs_issue_write+0x256/0x610 [cifs]
[  750.441987] [   T9870]  netfs_do_issue_write+0xc2/0x340 [netfs]
[  750.442387] [   T9870]  netfs_advance_write+0x45b/0x1270 [netfs]
[  750.442969] [   T9870]  ? rolling_buffer_append+0x12d/0x440 [netfs]
[  750.443376] [   T9870]  netfs_write_folio+0xd6c/0x1be0 [netfs]
[  750.443768] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.444145] [   T9870]  netfs_writepages+0x2e9/0xa80 [netfs]
[  750.444541] [   T9870]  ? __pfx_netfs_writepages+0x10/0x10 [netfs]
[  750.444936] [   T9870]  ? exit_files+0xab/0xe0
[  750.445312] [   T9870]  ? do_exit+0x148f/0x2980
[  750.445672] [   T9870]  ? do_group_exit+0xb5/0x250
[  750.446028] [   T9870]  ? arch_do_signal_or_restart+0x92/0x630
[  750.446402] [   T9870]  ? exit_to_user_mode_loop+0x98/0x170
[  750.446762] [   T9870]  ? do_syscall_64+0x2cf/0xd80
[  750.447132] [   T9870]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.447499] [   T9870]  do_writepages+0x21f/0x590
[  750.447859] [   T9870]  ? __pfx_do_writepages+0x10/0x10
[  750.448236] [   T9870]  filemap_fdatawrite_wbc+0xe1/0x140
[  750.448595] [   T9870]  __filemap_fdatawrite_range+0xba/0x100
[  750.448953] [   T9870]  ? __pfx___filemap_fdatawrite_range+0x10/0x10
[  750.449336] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.449697] [   T9870]  filemap_write_and_wait_range+0x7d/0xf0
[  750.450062] [   T9870]  cifs_flush+0x153/0x320 [cifs]
[  750.450592] [   T9870]  filp_flush+0x107/0x1a0
[  750.450952] [   T9870]  filp_close+0x14/0x30
[  750.451322] [   T9870]  put_files_struct.part.0+0x126/0x2a0
[  750.451678] [   T9870]  ? __pfx__raw_spin_lock+0x10/0x10
[  750.452033] [   T9870]  exit_files+0xab/0xe0
[  750.452401] [   T9870]  do_exit+0x148f/0x2980
[  750.452751] [   T9870]  ? __pfx_do_exit+0x10/0x10
[  750.453109] [   T9870]  ? __kasan_check_write+0x14/0x30
[  750.453459] [   T9870]  ? _raw_spin_lock_irq+0x8a/0xf0
[  750.453787] [   T9870]  do_group_exit+0xb5/0x250
[  750.454082] [   T9870]  get_signal+0x22d3/0x22e0
[  750.454406] [   T9870]  ? __pfx_get_signal+0x10/0x10
[  750.454709] [   T9870]  ? fpregs_assert_state_consistent+0x68/0x100
[  750.455031] [   T9870]  ? folio_add_lru+0xda/0x120
[  750.455347] [   T9870]  arch_do_signal_or_restart+0x92/0x630
[  750.455656] [   T9870]  ? __pfx_arch_do_signal_or_restart+0x10/0x10
[  750.455967] [   T9870]  exit_to_user_mode_loop+0x98/0x170
[  750.456282] [   T9870]  do_syscall_64+0x2cf/0xd80
[  750.456591] [   T9870]  ? __kasan_check_read+0x11/0x20
[  750.456897] [   T9870]  ? count_memcg_events+0x1b4/0x420
[  750.457280] [   T9870]  ? handle_mm_fault+0x148/0x690
[  750.457616] [   T9870]  ? _raw_spin_lock_irq+0x8a/0xf0
[  750.457925] [   T9870]  ? __kasan_check_read+0x11/0x20
[  750.458297] [   T9870]  ? fpregs_assert_state_consistent+0x68/0x100
[  750.458672] [   T9870]  ? irqentry_exit_to_user_mode+0x2e/0x250
[  750.459191] [   T9870]  ? irqentry_exit+0x43/0x50
[  750.459600] [   T9870]  ? exc_page_fault+0x75/0xe0
[  750.460130] [   T9870]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  750.460570] [   T9870] RIP: 0033:0x7858c94ab6e2
[  750.461206] [   T9870] Code: Unable to access opcode bytes at 0x7858c94ab6b8.
[  750.461780] [   T9870] RSP: 002b:00007858c9248ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000022
[  750.462327] [   T9870] RAX: fffffffffffffdfe RBX: 00007858c92496c0 RCX: 00007858c94ab6e2
[  750.462653] [   T9870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[  750.462969] [   T9870] RBP: 00007858c9248d10 R08: 0000000000000000 R09: 0000000000000000
[  750.463290] [   T9870] R10: 0000000000000000 R11: 0000000000000246 R12: fffffffffffffde0
[  750.463640] [   T9870] R13: 0000000000000020 R14: 0000000000000002 R15: 00007ffc072d2230
[  750.463965] [   T9870]  </TASK>
[  750.464285] [   T9870] Modules linked in: siw ib_uverbs ccm cmac nls_utf8 cifs cifs_arc4 nls_ucs2_utils rdma_cm iw_cm ib_cm ib_core cifs_md4 netfs softdog vboxsf vboxguest cpuid intel_rapl_msr intel_rapl_common intel_uncore_frequency_common intel_pmc_core pmt_telemetry pmt_class intel_pmc_ssram_telemetry intel_vsec polyval_clmulni ghash_clmulni_intel sha1_ssse3 aesni_intel rapl i2c_piix4 i2c_smbus joydev input_leds mac_hid sunrpc binfmt_misc kvm_intel kvm irqbypass sch_fq_codel efi_pstore nfnetlink vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock vmw_vmci dmi_sysfs ip_tables x_tables autofs4 hid_generic vboxvideo usbhid drm_vram_helper psmouse vga16fb vgastate drm_ttm_helper serio_raw hid ahci libahci ttm pata_acpi video wmi [last unloaded: vboxguest]
[  750.467127] [   T9870] CR2: ffff8880110a2000

cc: Tom Talpey <tom@talpey.com>
cc: linux-cifs@vger.kernel.org
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: Tom Talpey <tom@talpey.com>
Fixes: c45ebd636c ("cifs: Provide the capability to extract from ITER_FOLIOQ to RDMA SGEs")
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:24 -05:00
zhangjian
34331d7bee smb: client: fix first command failure during re-negotiation
after fabc4ed200f9, server_unresponsive add a condition to check whether client
need to reconnect depending on server->lstrp. When client failed to reconnect
for some time and abort connection, server->lstrp is updated for the last time.
In the following scene, server->lstrp is too old. This cause next command
failure in re-negotiation rather than waiting for re-negotiation done.

1. mount -t cifs -o username=Everyone,echo_internal=10 //$server_ip/export /mnt
2. ssh $server_ip "echo b > /proc/sysrq-trigger &"
3. ls /mnt
4. sleep 21s
5. ssh $server_ip "service firewalld stop"
6. ls # return EHOSTDOWN

If the interval between 5 and 6 is too small, 6 may trigger sending negotiation
request. Before backgrounding cifsd thread try to receive negotiation response
from server in cifs_readv_from_socket, server_unresponsive may trigger
cifs_reconnect which cause 6 to be failed:

ls thread
----------------
  smb2_negotiate
    server->tcpStatus = CifsInNegotiate
    compound_send_recv
      wait_for_compound_request

cifsd thread
----------------
  cifs_readv_from_socket
    server_unresponsive
      server->tcpStatus == CifsInNegotiate && jiffies > server->lstrp + 20s
        cifs_reconnect
          cifs_abort_connection: mid_state = MID_RETRY_NEEDED

ls thread
----------------
      cifs_sync_mid_result return EAGAIN
  smb2_negotiate return EHOSTDOWN

Though server->lstrp means last server response time, it is updated in
cifs_abort_connection and cifs_get_tcp_session. We can also update server->lstrp
before switching into CifsInNegotiate state to avoid failure in 6.

Fixes: 7ccc146546 ("smb: client: fix hang in wait_for_response() for negproto")
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Acked-by: Meetakshi Setiya <msetiya@microsoft.com>
Signed-off-by: zhangjian <zhangjian496@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-21 11:03:24 -05:00
Linus Torvalds
f7301f856d io_uring-6.16-20250621
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Merge tag 'io_uring-6.16-20250621' of git://git.kernel.dk/linux

Pull io_uring fix from Jens Axboe:
 "A single fix to hopefully wrap up the saga of receive bundles"

* tag 'io_uring-6.16-20250621' of git://git.kernel.dk/linux:
  io_uring/net: always use current transfer count for buffer put
2025-06-21 08:40:45 -07:00
Linus Torvalds
26fef998eb ACPI fix for 6.16-rc3
Fix a crash in ACPICA while attempting to evaluate a control method
 that expects more arguments than are being passed to it, which was
 exposed by a defective firmware update from a prominent OEM on multiple
 systems (Rafael Wysocki).
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Merge tag 'acpi-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Fix a crash in ACPICA while attempting to evaluate a control method
  that expects more arguments than are being passed to it, which was
  exposed by a defective firmware update from a prominent OEM on
  multiple systems (Rafael Wysocki)"

* tag 'acpi-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Refuse to evaluate a method if arguments are missing
2025-06-21 08:27:12 -07:00
Linus Torvalds
f0eeb5f6f6 pci-v6.16-fixes-1
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Merge tag 'pci-v6.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI fixes from Bjorn Helgaas:

 - Set up runtime PM even for devices that lack a PM Capability as we
   did before 4d4c10f763 ("PCI: Explicitly put devices into D0 when
   initializing"), which broke resume in some VFIO scenarios (Mario
   Limonciello)

 - Ignore pciehp Presence Detect Changed events caused by DPC, even if
   they occur after a Data Link Layer State Changed event, to fix a VFIO
   GPU passthrough regression in v6.13 (Lukas Wunner)

* tag 'pci-v6.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI: pciehp: Ignore belated Presence Detect Changed caused by DPC
  PCI/PM: Set up runtime PM even for devices without PCI PM
2025-06-21 08:21:10 -07:00
Linus Torvalds
afa3d8b6e0 We recently got a report of a crash [1] with misuse of call_rcu().
Instead of crashing the kernel, a warning and graceful return is better.
 [1] https://lore.kernel.org/all/aEnVuzK7VhGSizWj@pc636/
 
 Uladzislau Rezki (Sony) (1):
       rcu: Return early if callback is not specified
 
  kernel/rcu/tree.c | 4 ++++
  1 file changed, 4 insertions(+)
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Merge tag 'rcu/fixes-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

Pull RCU fix from Joel Fernandes:
 "We recently got a report of a crash [1] with misuse of call_rcu().

  Instead of crashing the kernel, a warning and graceful return is
  better:

   - rcu: Return early if callback is not specified (Uladzislau Rezki)"

Link: https://lore.kernel.org/all/aEnVuzK7VhGSizWj@pc636/ [1]

* tag 'rcu/fixes-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux:
  rcu: Return early if callback is not specified
2025-06-21 08:10:21 -07:00
Linus Torvalds
7c7f9dd1ea perf tools fixes for v6.16, 1st batch:
- Fix some file descriptor leaks that stand out with recent changes to
   'perf list'.
 
 - Fix prctl include to fix building 'perf bench futex' hash with musl libc.
 
 - Restrict 'perf test' uniquifying entry to machines with 'uncore_imc' PMUs.
 
 - Document new output fields (op, cache, mem, dtlb, snoop) used with
   'perf mem'.
 
 - Synchronize kernel header copies.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v6.16-1-2025-06-20' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix some file descriptor leaks that stand out with recent changes to
   'perf list'

 - Fix prctl include to fix building 'perf bench futex' hash with musl
   libc

 - Restrict 'perf test' uniquifying entry to machines with 'uncore_imc'
   PMUs

 - Document new output fields (op, cache, mem, dtlb, snoop) used with
   'perf mem'

 - Synchronize kernel header copies

* tag 'perf-tools-fixes-for-v6.16-1-2025-06-20' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  tools headers x86 cpufeatures: Sync with the kernel sources
  perf bench futex: Fix prctl include in musl libc
  perf test: Directory file descriptor leak
  perf evsel: Missed close() when probing hybrid core PMUs
  tools headers: Synchronize linux/bits.h with the kernel sources
  tools arch amd ibs: Sync ibs.h with the kernel sources
  tools arch x86: Sync the msr-index.h copy with the kernel sources
  tools headers: Syncronize linux/build_bug.h with the kernel sources
  tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench'
  tools headers UAPI: Sync linux/kvm.h with the kernel sources
  tools headers UAPI: Sync the drm/drm.h with the kernel sources
  perf beauty: Update copy of linux/socket.h with the kernel sources
  tools headers UAPI: Sync kvm header with the kernel sources
  tools headers x86 svm: Sync svm headers with the kernel sources
  tools headers UAPI: Sync KVM's vmx.h header with the kernel sources
  tools kvm headers arm64: Update KVM header from the kernel sources
  tools headers UAPI: Sync linux/prctl.h with the kernel sources to pick FUTEX knob
  perf mem: Document new output fields (op, cache, mem, dtlb, snoop)
  tools headers: Update the fs headers with the kernel sources
  perf test: Restrict uniquifying test to machines with 'uncore_imc'
2025-06-21 07:59:45 -07:00
Linus Torvalds
3f75bfff44 The main fix that really needs to get in is the revert of the patch
adding the new mtd_master class, because it entirely fails the
 partitioning if a specific Kconfig option is set. We need to think how
 to handle that differently, so let's revert it as we need to get back to
 the pen and paper situation again.
 
 Otherwise the definition of some Winbond SPI NAND chips are receiving
 some fixes (geometry and maximum frequency, mostly).
 
 And finally a small memory leak gets also fixed.
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Merge tag 'mtd/fixes-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull mtd fixes from Miquel Raynal:
 "The main fix that really needs to get in is the revert of the patch
  adding the new mtd_master class, because it entirely fails the
  partitioning if a specific Kconfig option is set. We need to think how
  to handle that differently, so let's revert it as we need to get back
  to the pen and paper situation again.

  Otherwise the definition of some Winbond SPI NAND chips are receiving
  some fixes (geometry and maximum frequency, mostly).

  And finally a small memory leak gets also fixed"

* tag 'mtd/fixes-for-6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: spinand: fix memory leak of ECC engine conf
  mtd: spinand: winbond: Prevent unsupported frequencies on dual/quad I/O variants
  mtd: spinand: winbond: Increase maximum frequency on an octal operation
  mtd: spinand: winbond: Fix W35N number of planes/LUN
  Revert "mtd: core: always create master device"
2025-06-20 22:36:48 -07:00
Linus Torvalds
a765b9e6db SCSI fixes on 20250620
Two small and obvious driver fixes.
 
 Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two small and obvious driver fixes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: elx: efct: Fix memory leak in efct_hw_parse_filter()
  scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()
2025-06-20 22:34:52 -07:00
Blake Jones
edf2cadf01 perf test: add test for BPF metadata collection
This is an end-to-end test for the PERF_RECORD_BPF_METADATA support.
It adds a new "bpf_metadata_perf_version" variable to perf's BPF programs,
so that when they are loaded, there will be at least one BPF program with
some metadata to parse. The test invokes "perf record" in a way that loads
one of those BPF programs, and then sifts through the output to find its
BPF metadata.

Signed-off-by: Blake Jones <blakejones@google.com>
Link: https://lore.kernel.org/r/20250612194939.162730-6-blakejones@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 14:55:24 -07:00
Blake Jones
f19860ea94 perf tools: display the new PERF_RECORD_BPF_METADATA event
Here's some example "perf script -D" output for the new event type. The
": unhandled!" message is from tool.c, analogous to other behavior there.
I've elided some rows with all NUL characters for brevity, and I wrapped
one of the >75-column lines to fit in the commit guidelines.

0x50fc8@perf.data [0x260]: event: 84
.
. ... raw event: size 608 bytes
.  0000:  54 00 00 00 00 00 60 02 62 70 66 5f 70 72 6f 67  T.....`.bpf_prog
.  0010:  5f 31 65 30 61 32 65 33 36 36 65 35 36 66 31 61  _1e0a2e366e56f1a
.  0020:  32 5f 70 65 72 66 5f 73 61 6d 70 6c 65 5f 66 69  2_perf_sample_fi
.  0030:  6c 74 65 72 00 00 00 00 00 00 00 00 00 00 00 00  lter............
.  0040:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[...]
.  0110:  74 65 73 74 5f 76 61 6c 75 65 00 00 00 00 00 00  test_value......
.  0120:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[...]
.  0150:  34 32 00 00 00 00 00 00 00 00 00 00 00 00 00 00  42..............
.  0160:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[...]

0 0x50fc8 [0x260]: PERF_RECORD_BPF_METADATA \
      prog bpf_prog_1e0a2e366e56f1a2_perf_sample_filter
  entry 0:           test_value = 42
: unhandled!

Signed-off-by: Blake Jones <blakejones@google.com>
Link: https://lore.kernel.org/r/20250612194939.162730-5-blakejones@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 14:48:56 -07:00
Blake Jones
fdc3441f2d perf record: collect BPF metadata from new programs
This collects metadata for any BPF programs that were loaded during a
"perf record" run, and emits it at the end of the run.

Signed-off-by: Blake Jones <blakejones@google.com>
Link: https://lore.kernel.org/r/20250612194939.162730-4-blakejones@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 14:48:49 -07:00
Blake Jones
ab38e84ba9 perf record: collect BPF metadata from existing BPF programs
Look for .rodata maps, find ones with 'bpf_metadata_' variables, extract
their values as strings, and create a new PERF_RECORD_BPF_METADATA
synthetic event using that data. The code gets invoked from the existing
routine perf_event__synthesize_one_bpf_prog().

For example, a BPF program with the following variables:

    const char bpf_metadata_version[] SEC(".rodata") = "3.14159";
    int bpf_metadata_value[] SEC(".rodata") = 42;

would generate a PERF_RECORD_BPF_METADATA record with:

    .prog_name        = <BPF program name, e.g. "bpf_prog_a1b2c3_foo">
    .nr_entries       = 2
    .entries[0].key   = "version"
    .entries[0].value = "3.14159"
    .entries[1].key   = "value"
    .entries[1].value = "42"

Each of the BPF programs and subprograms that share those variables would
get a distinct PERF_RECORD_BPF_METADATA record, with the ".prog_name"
showing the name of each program or subprogram. The prog_name is
deliberately the same as the ".name" field in the corresponding
PERF_RECORD_KSYMBOL record.

This code only gets invoked if support for displaying BTF char arrays
as strings is detected.

Signed-off-by: Blake Jones <blakejones@google.com>
Link: https://lore.kernel.org/r/20250612194939.162730-3-blakejones@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 14:48:35 -07:00
Blake Jones
1d0654b7fd perf build: detect support for libbpf's emit_strings option
This creates a config option that detects libbpf's ability to display
character arrays as strings, which was just added to the BPF tree
(https://git.kernel.org/bpf/bpf-next/c/87c9c79a02b4).

To test this change, I built perf (from later in this patch set) with:

 - static libbpf (default, using source from kernel tree)
 - dynamic libbpf (LIBBPF_DYNAMIC=1 LIBBPF_INCLUDE=/usr/local/include)

For both the static and dynamic versions, I used headers with and without
the ".emit_strings" option.

I verified that of the four resulting binaries, the two with
".emit_strings" would successfully record BPF_METADATA events, and the two
without wouldn't.  All four binaries would successfully display
BPF_METADATA events, because the relevant bit of libbpf code is only used
during "perf record".

Signed-off-by: Blake Jones <blakejones@google.com>
Link: https://lore.kernel.org/r/20250612194939.162730-2-blakejones@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 14:48:14 -07:00
Anubhav Shelat
13b38e6b80 perf header: remove unecessary core id test
It is possible for systems to have a greater socket id number than the
number of cpus present on a machine, so this test is obselete and should
be removed.

Signed-off-by: Anubhav Shelat <ashelat@redhat.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250618142921.4053400-2-ashelat@redhat.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 13:49:46 -07:00
Ian Rogers
2d58468864 perf test: Add header shell test
Add a shell test that sanity checks perf data and pipe mode produce
expected header fields.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250619002555.100896-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 13:37:42 -07:00
Namhyung Kim
dcbe6e51a0 perf parse-events: Set default GH modifier properly
Commit 7b100989b4 ("perf evlist: Remove __evlist__add_default")
changed to use "cycles:P" as a default event.  But the problem is it
cannot set other default modifiers correctly.

perf kvm needs to set attr.exclude_host by default but it didn't work
because of the logic in the parse_events__modifier_list().  Also the
exclude_GH_default was applied only if ":u" modifier was specified -
which is strange.  Move it out after handling the ":GH" and check
perf_host and perf_guest properly.

Before:
  $ ./perf kvm record -vv true |& grep exclude
  (nothing)

But specifying an event (without a modifier) works:

  $ ./perf kvm record -vv -e cycles true |& grep exclude
    exclude_host                     1

After:
It now works for the both cases:

  $ ./perf kvm record -vv true |& grep exclude
    exclude_host                     1

  $ ./perf kvm record -vv -e cycles true |& grep exclude
    exclude_host                     1

Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250606225431.2109754-1-namhyung@kernel.org
Fixes: 35c8d21371 ("perf tools: Don't set attr.exclude_guest by default")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 13:33:30 -07:00
Ian Rogers
588d22b404 perf test: Expand user space event reading (rdpmc) tests
Test that disabling rdpmc support via /sys/bus/event_source/cpu*/rdpmc
disables reading in the mmap (libperf read support will fallback to
using a system call).
Test all hybrid PMUs support rdpmc.
Ensure hybrid PMUs use the correct CPU to rdpmc the correct
event. Previously the test would open cycles or instructions with no
extended type then rdpmc it on whatever CPU. This could fail/skip due
to which CPU the test was scheduled upon.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20250614004528.1652860-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 13:14:07 -07:00
Kotaro, Tokai
ce3d5af2a9 perf vendor events arm64: Update FUJITSU-MONAKA pmu event
Update pmu events for FUJITSU-MONAKA.
And, also updated common-and-microarch.json.

FUJITSU-MONAKA PMU Events Specification v1.1 and Errata v1.0 URL:
https://github.com/fujitsu/FUJITSU-MONAKA

Arm Architecture Reference Version L.b URL:
https://developer.arm.com/documentation/ddi0487/lb/?lang=en

Signed-off-by: Kotaro, Tokai <fj0635gf@aa.jp.fujitsu.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250618063618.1244363-1-fj0635gf@aa.jp.fujitsu.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20 13:02:03 -07:00
Shiji Yang
3085ef9d9e irqchip/ath79-misc: Fix missing prototypes warnings
ath79_misc_irq_init() was defined but unused since commit 51fa4f8912
("MIPS: ath79: drop legacy IRQ code"), so it's time to drop it.

The build also warns about a missing prototype of get_c0_perfcount_int().

Remove the stale leftover function and add the missing include.

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/OSBPR01MB167032D2017645200787AAEBBC72A@OSBPR01MB1670.jpnprd01.prod.outlook.com
2025-06-20 21:38:52 +02:00
Uladzislau Rezki (Sony)
33b6a1f155 rcu: Return early if callback is not specified
Currently the call_rcu() API does not check whether a callback
pointer is NULL. If NULL is passed, rcu_core() will try to invoke
it, resulting in NULL pointer dereference and a kernel crash.

To prevent this and improve debuggability, this patch adds a check
for NULL and emits a kernel stack trace to help identify a faulty
caller.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
2025-06-20 15:31:48 -04:00
Binbin Wu
25e8b1dd48 KVM: TDX: Exit to userspace for GetTdVmCallInfo
Exit to userspace for TDG.VP.VMCALL<GetTdVmCallInfo> via KVM_EXIT_TDX,
to allow userspace to provide information about the support of
TDVMCALLs when r12 is 1 for the TDVMCALLs beyond the GHCI base API.

GHCI spec defines the GHCI base TDVMCALLs: <GetTdVmCallInfo>, <MapGPA>,
<ReportFatalError>, <Instruction.CPUID>, <#VE.RequestMMIO>,
<Instruction.HLT>, <Instruction.IO>, <Instruction.RDMSR> and
<Instruction.WRMSR>. They must be supported by VMM to support TDX guests.

For GetTdVmCallInfo
- When leaf (r12) to enumerate TDVMCALL functionality is set to 0,
  successful execution indicates all GHCI base TDVMCALLs listed above are
  supported.

  Update the KVM TDX document with the set of the GHCI base APIs.

- When leaf (r12) to enumerate TDVMCALL functionality is set to 1, it
  indicates the TDX guest is querying the supported TDVMCALLs beyond
  the GHCI base TDVMCALLs.
  Exit to userspace to let userspace set the TDVMCALL sub-function bit(s)
  accordingly to the leaf outputs.  KVM could set the TDVMCALL bit(s)
  supported by itself when the TDVMCALLs don't need support from userspace
  after returning from userspace and before entering guest. Currently, no
  such TDVMCALLs implemented, KVM just sets the values returned from
  userspace.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
[Adjust userspace API. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2025-06-20 13:55:47 -04:00
Binbin Wu
cf207eac06 KVM: TDX: Handle TDG.VP.VMCALL<GetQuote>
Handle TDVMCALL for GetQuote to generate a TD-Quote.

GetQuote is a doorbell-like interface used by TDX guests to request VMM
to generate a TD-Quote signed by a service hosting TD-Quoting Enclave
operating on the host.  A TDX guest passes a TD Report (TDREPORT_STRUCT) in
a shared-memory area as parameter.  Host VMM can access it and queue the
operation for a service hosting TD-Quoting enclave.  When completed, the
Quote is returned via the same shared-memory area.

KVM only checks the GPA from the TDX guest has the shared-bit set and drops
the shared-bit before exiting to userspace to avoid bleeding the shared-bit
into KVM's exit ABI.  KVM forwards the request to userspace VMM (e.g. QEMU)
and userspace VMM queues the operation asynchronously.  KVM sets the return
code according to the 'ret' field set by userspace to notify the TDX guest
whether the request has been queued successfully or not.  When the request
has been queued successfully, the TDX guest can poll the status field in
the shared-memory area to check whether the Quote generation is completed
or not.  When completed, the generated Quote is returned via the same
buffer.

Add KVM_EXIT_TDX as a new exit reason to userspace. Userspace is
required to handle the KVM exit reason as the initial support for TDX,
by reentering KVM to ensure that the TDVMCALL is complete.  While at it,
add a note that KVM_EXIT_HYPERCALL also requires reentry with KVM_RUN.

Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Tested-by: Mikko Ylinen <mikko.ylinen@linux.intel.com>
Acked-by: Kai Huang <kai.huang@intel.com>
[Adjust userspace API. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2025-06-20 13:09:32 -04:00
Binbin Wu
b5aafcb4ef KVM: TDX: Add new TDVMCALL status code for unsupported subfuncs
Add the new TDVMCALL status code TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED and
return it for unimplemented TDVMCALL subfunctions.

Returning TDVMCALL_STATUS_INVALID_OPERAND when a subfunction is not
implemented is vague because TDX guests can't tell the error is due to
the subfunction is not supported or an invalid input of the subfunction.
New GHCI spec adds TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED to avoid the
ambiguity. Use it instead of TDVMCALL_STATUS_INVALID_OPERAND.

Before the change, for common guest implementations, when a TDX guest
receives TDVMCALL_STATUS_INVALID_OPERAND, it has two cases:
1. Some operand is invalid. It could change the operand to another value
   retry.
2. The subfunction is not supported.

For case 1, an invalid operand usually means the guest implementation bug.
Since the TDX guest can't tell which case is, the best practice for
handling TDVMCALL_STATUS_INVALID_OPERAND is stopping calling such leaf,
treating the failure as fatal if the TDVMCALL is essential or ignoring
it if the TDVMCALL is optional.

With this change, TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED could be sent to
old TDX guest that do not know about it, but it is expected that the
guest will make the same action as TDVMCALL_STATUS_INVALID_OPERAND.
Currently, no known TDX guest checks TDVMCALL_STATUS_INVALID_OPERAND
specifically; for example Linux just checks for success.

Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
[Return it for untrapped KVM_HC_MAP_GPA_RANGE. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2025-06-20 13:09:31 -04:00
Linus Torvalds
11313e2f78 gpio fixes for v6.16-rc3
- correct the ACPI GPIO access mode in gpio-loongson-64bit
 - only obtain the interrupt for a single instance of the chip controlled
   by gpio-mlxbf3
 - fix an invalid value return from probe() in gpio-pca953x
 - add missing MODULE_DEVICE_TABLE() to gpio-spacemit
 - update the HiSilicon GPIO driver maintainer entry
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Merge tag 'gpio-fixes-for-v6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - correct the ACPI GPIO access mode in gpio-loongson-64bit

 - only obtain the interrupt for a single instance of the chip
   controlled by gpio-mlxbf3

 - fix an invalid value return from probe() in gpio-pca953x

 - add missing MODULE_DEVICE_TABLE() to gpio-spacemit

 - update the HiSilicon GPIO driver maintainer entry

* tag 'gpio-fixes-for-v6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: mlxbf3: only get IRQ for device instance 0
  gpio: pca953x: fix wrong error probe return value
  gpio: spacemit: Add missing MODULE_DEVICE_TABLE
  gpio: loongson-64bit: Correct Loongson-7A2000 ACPI GPIO access mode
  MAINTAINERS: Update HiSilicon GPIO driver maintainer
2025-06-20 10:07:56 -07:00
Paolo Bonzini
2f3fc29ae8 KVM/riscv fixes for 6.16, take #1
- Fix the size parameter check in SBI SFENCE calls
 - Don't treat SBI HFENCE calls as NOPs
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Merge tag 'kvm-riscv-fixes-6.16-1' of https://github.com/kvm-riscv/linux into HEAD

KVM/riscv fixes for 6.16, take #1

- Fix the size parameter check in SBI SFENCE calls
- Don't treat SBI HFENCE calls as NOPs
2025-06-20 13:07:24 -04:00