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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Commit Graph

45181 Commits

Author SHA1 Message Date
Linus Torvalds
a382b06d29 KVM/arm64 fixes for 6.14, take #4
* Fix a couple of bugs affecting pKVM's PSCI relay implementation
   when running in the hVHE mode, resulting in the host being entered
   with the MMU in an unknown state, and EL2 being in the wrong mode.
 
 x86:
 
 * Set RFLAGS.IF in C code on SVM to get VMRUN out of the STI shadow.
 
 * Ensure DEBUGCTL is context switched on AMD to avoid running the guest with
   the host's value, which can lead to unexpected bus lock #DBs.
 
 * Suppress DEBUGCTL.BTF on AMD (to match Intel), as KVM doesn't properly
   emulate BTF.  KVM's lack of context switching has meant BTF has always been
   broken to some extent.
 
 * Always save DR masks for SNP vCPUs if DebugSwap is *supported*, as the guest
   can enable DebugSwap without KVM's knowledge.
 
 * Fix a bug in mmu_stress_tests where a vCPU could finish the "writes to RO
   memory" phase without actually generating a write-protection fault.
 
 * Fix a printf() goof in the SEV smoke test that causes build failures with
   -Werror.
 
 * Explicitly zero EAX and EBX in CPUID.0x8000_0022 output when PERFMON_V2
   isn't supported by KVM.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "arm64:

   - Fix a couple of bugs affecting pKVM's PSCI relay implementation
     when running in the hVHE mode, resulting in the host being entered
     with the MMU in an unknown state, and EL2 being in the wrong mode

  x86:

   - Set RFLAGS.IF in C code on SVM to get VMRUN out of the STI shadow

   - Ensure DEBUGCTL is context switched on AMD to avoid running the
     guest with the host's value, which can lead to unexpected bus lock
     #DBs

   - Suppress DEBUGCTL.BTF on AMD (to match Intel), as KVM doesn't
     properly emulate BTF. KVM's lack of context switching has meant BTF
     has always been broken to some extent

   - Always save DR masks for SNP vCPUs if DebugSwap is *supported*, as
     the guest can enable DebugSwap without KVM's knowledge

   - Fix a bug in mmu_stress_tests where a vCPU could finish the "writes
     to RO memory" phase without actually generating a write-protection
     fault

   - Fix a printf() goof in the SEV smoke test that causes build
     failures with -Werror

   - Explicitly zero EAX and EBX in CPUID.0x8000_0022 output when
     PERFMON_V2 isn't supported by KVM"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Explicitly zero EAX and EBX when PERFMON_V2 isn't supported by KVM
  KVM: selftests: Fix printf() format goof in SEV smoke test
  KVM: selftests: Ensure all vCPUs hit -EFAULT during initial RO stage
  KVM: SVM: Don't rely on DebugSwap to restore host DR0..DR3
  KVM: SVM: Save host DR masks on CPUs with DebugSwap
  KVM: arm64: Initialize SCTLR_EL1 in __kvm_hyp_init_cpu()
  KVM: arm64: Initialize HCR_EL2.E2H early
  KVM: x86: Snapshot the host's DEBUGCTL after disabling IRQs
  KVM: SVM: Manually context switch DEBUGCTL if LBR virtualization is disabled
  KVM: x86: Snapshot the host's DEBUGCTL in common x86
  KVM: SVM: Suppress DEBUGCTL.BTF on AMD
  KVM: SVM: Drop DEBUGCTL[5:2] from guest's effective value
  KVM: selftests: Assert that STI blocking isn't set after event injection
  KVM: SVM: Set RFLAGS.IF=1 in C code, to get VMRUN out of the STI shadow
2025-03-09 09:04:08 -10:00
Paolo Bonzini
ea9bd29a9c KVM x86 fixes for 6.14-rcN #2
- Set RFLAGS.IF in C code on SVM to get VMRUN out of the STI shadow.
 
  - Ensure DEBUGCTL is context switched on AMD to avoid running the guest with
    the host's value, which can lead to unexpected bus lock #DBs.
 
  - Suppress DEBUGCTL.BTF on AMD (to match Intel), as KVM doesn't properly
    emulate BTF.  KVM's lack of context switching has meant BTF has always been
    broken to some extent.
 
  - Always save DR masks for SNP vCPUs if DebugSwap is *supported*, as the guest
    can enable DebugSwap without KVM's knowledge.
 
  - Fix a bug in mmu_stress_tests where a vCPU could finish the "writes to RO
    memory" phase without actually generating a write-protection fault.
 
  - Fix a printf() goof in the SEV smoke test that causes build failures with
    -Werror.
 
  - Explicitly zero EAX and EBX in CPUID.0x8000_0022 output when PERFMON_V2
    isn't supported by KVM.
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Merge tag 'kvm-x86-fixes-6.14-rcN.2' of https://github.com/kvm-x86/linux into HEAD

KVM x86 fixes for 6.14-rcN #2

 - Set RFLAGS.IF in C code on SVM to get VMRUN out of the STI shadow.

 - Ensure DEBUGCTL is context switched on AMD to avoid running the guest with
   the host's value, which can lead to unexpected bus lock #DBs.

 - Suppress DEBUGCTL.BTF on AMD (to match Intel), as KVM doesn't properly
   emulate BTF.  KVM's lack of context switching has meant BTF has always been
   broken to some extent.

 - Always save DR masks for SNP vCPUs if DebugSwap is *supported*, as the guest
   can enable DebugSwap without KVM's knowledge.

 - Fix a bug in mmu_stress_tests where a vCPU could finish the "writes to RO
   memory" phase without actually generating a write-protection fault.

 - Fix a printf() goof in the SEV smoke test that causes build failures with
   -Werror.

 - Explicitly zero EAX and EBX in CPUID.0x8000_0022 output when PERFMON_V2
   isn't supported by KVM.
2025-03-09 03:44:06 -04:00
Linus Torvalds
1110ce6a1e 33 hotfixes. 24 are cc:stable and the remainder address post-6.13 issues
or aren't considered necessary for -stable kernels.
 
 26 are for MM and 7 are for non-MM.
 
 - "mm: memory_failure: unmap poisoned folio during migrate properly"
   from Ma Wupeng fixes a couple of two year old bugs involving the
   migration of hwpoisoned folios.
 
 - "selftests/damon: three fixes for false results" from SeongJae Park
   fixes three one year old bugs in the SAMON selftest code.
 
 The remainder are singletons and doubletons.  Please see the individual
 changelogs for details.
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Merge tag 'mm-hotfixes-stable-2025-03-08-16-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "33 hotfixes. 24 are cc:stable and the remainder address post-6.13
  issues or aren't considered necessary for -stable kernels.

  26 are for MM and 7 are for non-MM.

   - "mm: memory_failure: unmap poisoned folio during migrate properly"
     from Ma Wupeng fixes a couple of two year old bugs involving the
     migration of hwpoisoned folios.

   - "selftests/damon: three fixes for false results" from SeongJae Park
     fixes three one year old bugs in the SAMON selftest code.

  The remainder are singletons and doubletons. Please see the individual
  changelogs for details"

* tag 'mm-hotfixes-stable-2025-03-08-16-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (33 commits)
  mm/page_alloc: fix uninitialized variable
  rapidio: add check for rio_add_net() in rio_scan_alloc_net()
  rapidio: fix an API misues when rio_add_net() fails
  MAINTAINERS: .mailmap: update Sumit Garg's email address
  Revert "mm/page_alloc.c: don't show protection in zone's ->lowmem_reserve[] for empty zone"
  mm: fix finish_fault() handling for large folios
  mm: don't skip arch_sync_kernel_mappings() in error paths
  mm: shmem: remove unnecessary warning in shmem_writepage()
  userfaultfd: fix PTE unmapping stack-allocated PTE copies
  userfaultfd: do not block on locking a large folio with raised refcount
  mm: zswap: use ATOMIC_LONG_INIT to initialize zswap_stored_pages
  mm: shmem: fix potential data corruption during shmem swapin
  mm: fix kernel BUG when userfaultfd_move encounters swapcache
  selftests/damon/damon_nr_regions: sort collected regiosn before checking with min/max boundaries
  selftests/damon/damon_nr_regions: set ops update for merge results check to 100ms
  selftests/damon/damos_quota: make real expectation of quota exceeds
  include/linux/log2.h: mark is_power_of_2() with __always_inline
  NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback
  mm, swap: avoid BUG_ON in relocate_cluster()
  mm: swap: use correct step in loop to wait all clusters in wait_for_allocation()
  ...
2025-03-08 14:34:06 -10:00
Linus Torvalds
2a520073e7 s390 updates for 6.14-rc6
- Fix return address recovery of traced function in ftrace to ensure
   reliable stack unwinding
 
 - Fix compiler warnings and runtime crashes of vDSO selftests on s390 by
   introducing a dedicated GNU hash bucket pointer with correct 32-bit
   entry size
 
 - Fix test_monitor_call() inline asm, which misses CC clobber, by
   switching to an instruction that doesn't modify CC
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Merge tag 's390-6.14-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Vasily Gorbik:

 - Fix return address recovery of traced function in ftrace to ensure
   reliable stack unwinding

 - Fix compiler warnings and runtime crashes of vDSO selftests on s390
   by introducing a dedicated GNU hash bucket pointer with correct
   32-bit entry size

 - Fix test_monitor_call() inline asm, which misses CC clobber, by
   switching to an instruction that doesn't modify CC

* tag 's390-6.14-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/ftrace: Fix return address recovery of traced function
  selftests/vDSO: Fix GNU hash table entry size for s390x
  s390/traps: Fix test_monitor_call() inline assembly
2025-03-07 16:21:02 -10:00
SeongJae Park
582ccf78f6 selftests/damon/damon_nr_regions: sort collected regiosn before checking with min/max boundaries
damon_nr_regions.py starts DAMON, periodically collect number of regions
in snapshots, and see if it is in the requested range.  The check code
assumes the numbers are sorted on the collection list, but there is no
such guarantee.  Hence this can result in false positive test success. 
Sort the list before doing the check.

Link: https://lkml.kernel.org/r/20250225222333.505646-4-sj@kernel.org
Fixes: 781497347d ("selftests/damon: implement test for min/max_nr_regions")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-05 21:36:16 -08:00
SeongJae Park
695469c07a selftests/damon/damon_nr_regions: set ops update for merge results check to 100ms
damon_nr_regions.py updates max_nr_regions to a number smaller than
expected number of real regions and confirms DAMON respect the harsh
limit.  To give time for DAMON to make changes for the regions, 3
aggregation intervals (300 milliseconds) are given.

The internal mechanism works with not only the max_nr_regions, but also
sz_limit, though.  It avoids merging region if that casn make region of
size larger than sz_limit.  In the test, sz_limit is set too small to
achive the new max_nr_regions, unless it is updated for the new
min_nr_regions.  But the update is done only once per operations set
update interval, which is one second by default.

Hence, the test randomly incurs false positive failures.  Fix it by
setting the ops interval same to aggregation interval, to make sure
sz_limit is updated by the time of the check.

Link: https://lkml.kernel.org/r/20250225222333.505646-3-sj@kernel.org
Fixes: 8bf890c816 ("selftests/damon/damon_nr_regions: test online-tuned max_nr_regions")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-05 21:36:16 -08:00
SeongJae Park
1c684d77df selftests/damon/damos_quota: make real expectation of quota exceeds
Patch series "selftests/damon: three fixes for false results".

Fix three DAMON selftest bugs that cause two and one false positive
failures and successes.


This patch (of 3):

damos_quota.py assumes the quota will always exceeded.  But whether quota
will be exceeded or not depend on the monitoring results.  Actually the
monitored workload has chaning access pattern and hence sometimes the
quota may not really be exceeded.  As a result, false positive test
failures happen.  Expect how much time the quota will be exceeded by
checking the monitoring results, and use it instead of the naive
assumption.

Link: https://lkml.kernel.org/r/20250225222333.505646-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20250225222333.505646-2-sj@kernel.org
Fixes: 51f58c9da1 ("selftests/damon: add a test for DAMOS quota")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-05 21:36:16 -08:00
SeongJae Park
349db086a6 selftests/damon/damos_quota_goal: handle minimum quota that cannot be further reduced
damos_quota_goal.py selftest see if DAMOS quota goals tuning feature
increases or reduces the effective size quota for given score as expected.
The tuning feature sets the minimum quota size as one byte, so if the
effective size quota is already one, we cannot expect it further be
reduced.  However the test is not aware of the edge case, and fails since
it shown no expected change of the effective quota.  Handle the case by
updating the failure logic for no change to see if it was the case, and
simply skips to next test input.

Link: https://lkml.kernel.org/r/20250217182304.45215-1-sj@kernel.org
Fixes: f1c07c0a16 ("selftests/damon: add a test for DAMOS quota goal")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202502171423.b28a918d-lkp@intel.com
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>	[6.10.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-05 21:36:12 -08:00
John Hubbard
0a7565ee6e Revert "selftests/mm: remove local __NR_* definitions"
This reverts commit a5c6bc5900.

The general approach described in commit e076eaca59 ("selftests: break
the dependency upon local header files") was taken one step too far here:
it should not have been extended to include the syscall numbers.  This is
because doing so would require per-arch support in tools/include/uapi, and
no such support exists.

This revert fixes two separate reports of test failures, from Dave
Hansen[1], and Li Wang[2].  An excerpt of Dave's report:

Before this commit (a5c6bc5900) things are
fine.  But after, I get:

	running PKEY tests for unsupported CPU/OS

An excerpt of Li's report:

    I just found that mlock2_() return a wrong value in mlock2-test

[1] https://lore.kernel.org/dc585017-6740-4cab-a536-b12b37a7582d@intel.com
[2] https://lore.kernel.org/CAEemH2eW=UMu9+turT2jRie7+6ewUazXmA6kL+VBo3cGDGU6RA@mail.gmail.com

Link: https://lkml.kernel.org/r/20250214033850.235171-1-jhubbard@nvidia.com
Fixes: a5c6bc5900 ("selftests/mm: remove local __NR_* definitions")
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Li Wang <liwang@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: Andrei Vagin <avagin@google.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-05 21:36:12 -08:00
Thomas Weißschuh
a22ee38d2e selftests/vDSO: Fix GNU hash table entry size for s390x
Commit 14be4e6f35 ("selftests: vDSO: fix ELF hash table entry size for s390x")
changed the type of the ELF hash table entries to 64bit on s390x.
However the *GNU* hash tables entries are always 32bit.
The "bucket" pointer is shared between both hash algorithms.
On s390, this caused the GNU hash algorithm to access its 32-bit entries as if they
were 64-bit, triggering compiler warnings (assignment between "Elf64_Xword *" and
"Elf64_Word *") and runtime crashes.

Introduce a new dedicated "gnu_bucket" pointer which is used by the GNU hash.

Fixes: e0746bde6f ("selftests/vDSO: support DT_GNU_HASH")
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250217-selftests-vdso-s390-gnu-hash-v2-1-f6c2532ffe2a@linutronix.de
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2025-03-04 17:15:18 +01:00
Sean Christopherson
3b2d3db368 KVM: selftests: Fix printf() format goof in SEV smoke test
Print out the index of mismatching XSAVE bytes using unsigned decimal
format.  Some versions of clang complain about trying to print an integer
as an unsigned char.

  x86/sev_smoke_test.c:55:51: error: format specifies type 'unsigned char'
                                     but the argument has type 'int' [-Werror,-Wformat]

Fixes: 8c53183dba ("selftests: kvm: add test for transferring FPU state into VMSA")
Link: https://lore.kernel.org/r/20250228233852.3855676-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2025-03-03 07:45:34 -08:00
Sean Christopherson
d88ed5fb7c KVM: selftests: Ensure all vCPUs hit -EFAULT during initial RO stage
During the initial mprotect(RO) stage of mmu_stress_test, keep vCPUs
spinning until all vCPUs have hit -EFAULT, i.e. until all vCPUs have tried
to write to a read-only page.  If a vCPU manages to complete an entire
iteration of the loop without hitting a read-only page, *and* the vCPU
observes mprotect_ro_done before starting a second iteration, then the
vCPU will prematurely fall through to GUEST_SYNC(3) (on x86 and arm64) and
get out of sequence.

Replace the "do-while (!r)" loop around the associated _vcpu_run() with
a single invocation, as barring a KVM bug, the vCPU is guaranteed to hit
-EFAULT, and retrying on success is super confusion, hides KVM bugs, and
complicates this fix.  The do-while loop was semi-unintentionally added
specifically to fudge around a KVM x86 bug, and said bug is unhittable
without modifying the test to force x86 down the !(x86||arm64) path.

On x86, if forced emulation is enabled, vcpu_arch_put_guest() may trigger
emulation of the store to memory.  Due a (very, very) longstanding bug in
KVM x86's emulator, emulate writes to guest memory that fail during
__kvm_write_guest_page() unconditionally return KVM_EXIT_MMIO.  While that
is desirable in the !memslot case, it's wrong in this case as the failure
happens due to __copy_to_user() hitting a read-only page, not an emulated
MMIO region.

But as above, x86 only uses vcpu_arch_put_guest() if the __x86_64__ guards
are clobbered to force x86 down the common path, and of course the
unexpected MMIO is a KVM bug, i.e. *should* cause a test failure.

Fixes: b6c304aec6 ("KVM: selftests: Verify KVM correctly handles mprotect(PROT_READ)")
Reported-by: Yan Zhao <yan.y.zhao@intel.com>
Closes: https://lore.kernel.org/all/20250208105318.16861-1-yan.y.zhao@intel.com
Debugged-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Yan Zhao <yan.y.zhao@intel.com>
Tested-by: Yan Zhao <yan.y.zhao@intel.com>
Link: https://lore.kernel.org/r/20250228230804.3845860-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2025-03-03 07:37:28 -08:00
Linus Torvalds
ad69e02128 Fix an objtool false positive, and objtool related
build warnings that happens on PIE-enabled architectures
 such as LoongArch.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-urgent-2025-02-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fixes from Ingo Molnar:
 "Fix an objtool false positive, and objtool related build warnings that
  happens on PIE-enabled architectures such as LoongArch"

* tag 'objtool-urgent-2025-02-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Add bch2_trans_unlocked_or_in_restart_error() to bcachefs noreturns
  objtool: Fix C jump table annotations for Clang
  vmlinux.lds: Ensure that const vars with relocations are mapped R/O
2025-02-28 16:45:36 -08:00
Linus Torvalds
5c44ddaf7d Tracing fixes for v6.14:
- Fix crash from bad histogram entry
 
   An error path in the histogram creation could leave an entry
   in a link list that gets freed. Then when a new entry is added
   it can cause a u-a-f bug. This is fixed by restructuring the code
   so that the histogram is consistent on failure and everything is
   cleaned up appropriately.
 
 - Fix fprobe self test
 
   The fprobe self test relies on no function being attached by ftrace.
   BPF programs can attach to functions via ftrace and systemd now
   does so. This causes those functions to appear in the enabled_functions
   list which holds all functions attached by ftrace. The selftest also
   uses that file to see if functions are being connected correctly.
   It counts the functions in the file, but if there's already functions
   in the file, it fails. Instead, add the number of functions in the file
   at the start of the test to all the calculations during the test.
 
 - Fix potential division by zero of the function profiler stddev
 
   The calculated divisor that calculates the standard deviation of
   the function times can overflow. If the overflow happens to land
   on zero, that can cause a division by zero. Check for zero from
   the calculation before doing the division.
 
   TODO: Catch when it ever overflows and report it accordingly.
         For now, just prevent the system from crashing.
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Merge tag 'trace-v6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Fix crash from bad histogram entry

   An error path in the histogram creation could leave an entry in a
   link list that gets freed. Then when a new entry is added it can
   cause a u-a-f bug. This is fixed by restructuring the code so that
   the histogram is consistent on failure and everything is cleaned up
   appropriately.

 - Fix fprobe self test

   The fprobe self test relies on no function being attached by ftrace.
   BPF programs can attach to functions via ftrace and systemd now does
   so. This causes those functions to appear in the enabled_functions
   list which holds all functions attached by ftrace. The selftest also
   uses that file to see if functions are being connected correctly. It
   counts the functions in the file, but if there's already functions in
   the file, it fails. Instead, add the number of functions in the file
   at the start of the test to all the calculations during the test.

 - Fix potential division by zero of the function profiler stddev

   The calculated divisor that calculates the standard deviation of the
   function times can overflow. If the overflow happens to land on zero,
   that can cause a division by zero. Check for zero from the
   calculation before doing the division.

   TODO: Catch when it ever overflows and report it accordingly. For
   now, just prevent the system from crashing.

* tag 'trace-v6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ftrace: Avoid potential division by zero in function_stat_show()
  selftests/ftrace: Let fprobe test consider already enabled functions
  tracing: Fix bad hist from corrupting named_triggers list
2025-02-28 15:43:32 -08:00
Sean Christopherson
f3513a335e KVM: selftests: Assert that STI blocking isn't set after event injection
Add an L1 (guest) assert to the nested exceptions test to verify that KVM
doesn't put VMRUN in an STI shadow (AMD CPUs bleed the shadow into the
guest's int_state if a #VMEXIT occurs before VMRUN fully completes).

Add a similar assert to the VMX side as well, because why not.

Reviewed-by: Jim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20250224165442.2338294-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2025-02-28 09:15:23 -08:00
Heiko Carstens
3908b6baf2 selftests/ftrace: Let fprobe test consider already enabled functions
The fprobe test fails on Fedora 41 since the fprobe test assumption that
the number of enabled_functions is zero before the test starts is not
necessarily true. Some user space tools, like systemd, add BPF programs
that attach to functions. Those will show up in the enabled_functions table
and must be taken into account by the fprobe test.

Therefore count the number of lines of enabled_functions before tests
start, and use that as base when comparing expected results.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Link: https://lore.kernel.org/20250226142703.910860-1-hca@linux.ibm.com
Fixes: e85c5e9792 ("selftests/ftrace: Update fprobe test to check enabled_functions file")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-02-27 21:02:09 -05:00
Linus Torvalds
1e15510b71 Including fixes from bluetooth. We didn't get netfilter or wireless PRs
this week, so next week's PR is probably going to be bigger. A healthy
 dose of fixes for bugs introduced in the current release nonetheless.
 
 Current release - regressions:
 
  - Bluetooth: always allow SCO packets for user channel
 
  - af_unix: fix memory leak in unix_dgram_sendmsg()
 
  - rxrpc:
    - remove redundant peer->mtu_lock causing lockdep splats
    - fix spinlock flavor issues with the peer record hash
 
  - eth: iavf: fix circular lock dependency with netdev_lock
 
  - net: use rtnl_net_dev_lock() in register_netdevice_notifier_dev_net()
    RDMA driver register notifier after the device
 
 Current release - new code bugs:
 
  - ethtool: fix ioctl confusing drivers about desired HDS user config
 
  - eth: ixgbe: fix media cage present detection for E610 device
 
 Previous releases - regressions:
 
  - loopback: avoid sending IP packets without an Ethernet header
 
  - mptcp: reset connection when MPTCP opts are dropped after join
 
 Previous releases - always broken:
 
  - net: better track kernel sockets lifetime
 
  - ipv6: fix dst ref loop on input in seg6 and rpl lw tunnels
 
  - phy: qca807x: use right value from DTS for DAC_DSP_BIAS_CURRENT
 
  - eth: enetc: number of error handling fixes
 
  - dsa: rtl8366rb: reshuffle the code to fix config / build issue
    with LED support
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bluetooth.

  We didn't get netfilter or wireless PRs this week, so next week's PR
  is probably going to be bigger. A healthy dose of fixes for bugs
  introduced in the current release nonetheless.

  Current release - regressions:

   - Bluetooth: always allow SCO packets for user channel

   - af_unix: fix memory leak in unix_dgram_sendmsg()

   - rxrpc:
       - remove redundant peer->mtu_lock causing lockdep splats
       - fix spinlock flavor issues with the peer record hash

   - eth: iavf: fix circular lock dependency with netdev_lock

   - net: use rtnl_net_dev_lock() in
     register_netdevice_notifier_dev_net() RDMA driver register notifier
     after the device

  Current release - new code bugs:

   - ethtool: fix ioctl confusing drivers about desired HDS user config

   - eth: ixgbe: fix media cage present detection for E610 device

  Previous releases - regressions:

   - loopback: avoid sending IP packets without an Ethernet header

   - mptcp: reset connection when MPTCP opts are dropped after join

  Previous releases - always broken:

   - net: better track kernel sockets lifetime

   - ipv6: fix dst ref loop on input in seg6 and rpl lw tunnels

   - phy: qca807x: use right value from DTS for DAC_DSP_BIAS_CURRENT

   - eth: enetc: number of error handling fixes

   - dsa: rtl8366rb: reshuffle the code to fix config / build issue with
     LED support"

* tag 'net-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (53 commits)
  net: ti: icss-iep: Reject perout generation request
  idpf: fix checksums set in idpf_rx_rsc()
  selftests: drv-net: Check if combined-count exists
  net: ipv6: fix dst ref loop on input in rpl lwt
  net: ipv6: fix dst ref loop on input in seg6 lwt
  usbnet: gl620a: fix endpoint checking in genelink_bind()
  net/mlx5: IRQ, Fix null string in debug print
  net/mlx5: Restore missing trace event when enabling vport QoS
  net/mlx5: Fix vport QoS cleanup on error
  net: mvpp2: cls: Fixed Non IP flow, with vlan tag flow defination.
  af_unix: Fix memory leak in unix_dgram_sendmsg()
  net: Handle napi_schedule() calls from non-interrupt
  net: Clear old fragment checksum value in napi_reuse_skb
  gve: unlink old napi when stopping a queue using queue API
  net: Use rtnl_net_dev_lock() in register_netdevice_notifier_dev_net().
  tcp: Defer ts_recent changes until req is owned
  net: enetc: fix the off-by-one issue in enetc_map_tx_tso_buffs()
  net: enetc: remove the mm_lock from the ENETC v4 driver
  net: enetc: add missing enetc4_link_deinit()
  net: enetc: update UDP checksum when updating originTimestamp field
  ...
2025-02-27 09:32:42 -08:00
Linus Torvalds
f09d694cf7 sound fixes for 6.14-rc5
A collection of fixes.  The only slightly large change is for ASoC
 Cirrus codec, but that's still in a normal range.
 All the rest are small device-specific fixes and should be fairly
 safe to take.
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Merge tag 'sound-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of fixes. The only slightly large change is for ASoC
  Cirrus codec, but that's still in a normal range. All the rest are
  small device-specific fixes and should be fairly safe to take"

* tag 'sound-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: Fix microphone regression on ASUS N705UD
  ALSA: hda/realtek: Fix wrong mic setup for ASUS VivoBook 15
  ASoC: cs35l56: Prevent races when soft-resetting using SPI control
  firmware: cs_dsp: Remove async regmap writes
  ASoC: Intel: sof_sdw: warn both sdw and pch dmic are used
  ASoC: SOF: Intel: don't check number of sdw links when set dmic_fixup
  ASoC: dapm-graph: set fill colour of turned on nodes
  ASoC: fsl: Rename stream name of SAI DAI driver
  ASoC: es8328: fix route from DAC to output
  ALSA: usb-audio: Re-add sample rate quirk for Pioneer DJM-900NXS2
  ASoC: tas2764: Set the SDOUT polarity correctly
  ASoC: tas2764: Fix power control mask
  ALSA: usb-audio: Avoid dropping MIDI events at closing multiple ports
  ASoC: tas2770: Fix volume scale
2025-02-27 08:41:19 -08:00
Joe Damato
1cbddbddee selftests: drv-net: Check if combined-count exists
Some drivers, like tg3, do not set combined-count:

$ ethtool -l enp4s0f1
Channel parameters for enp4s0f1:
Pre-set maximums:
RX:		4
TX:		4
Other:		n/a
Combined:	n/a
Current hardware settings:
RX:		4
TX:		1
Other:		n/a
Combined:	n/a

In the case where combined-count is not set, the ethtool netlink code
in the kernel elides the value and the code in the test:

  netnl.channels_get(...)

With a tg3 device, the returned dictionary looks like:

{'header': {'dev-index': 3, 'dev-name': 'enp4s0f1'},
 'rx-max': 4,
 'rx-count': 4,
 'tx-max': 4,
 'tx-count': 1}

Note that the key 'combined-count' is missing. As a result of this
missing key the test raises an exception:

 # Exception|     if channels['combined-count'] == 0:
 # Exception|        ~~~~~~~~^^^^^^^^^^^^^^^^^^
 # Exception| KeyError: 'combined-count'

Change the test to check if 'combined-count' is a key in the dictionary
first and if not assume that this means the driver has separate RX and
TX queues.

With this change, the test now passes successfully on tg3 and mlx5
(which does have a 'combined-count').

Fixes: 1cf2704242 ("net: selftest: add test for netdev netlink queue-get API")
Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: David Wei <dw@davidwei.uk>
Link: https://patch.msgid.link/20250226181957.212189-1-jdamato@fastly.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-27 07:30:32 -08:00
Linus Torvalds
c0d35086a2 Landlock fix for v6.14-rc5
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Merge tag 'landlock-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

Pull landlock fixes from Mickaël Salaün:
 "Fixes to TCP socket identification, documentation, and tests"

* tag 'landlock-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
  selftests/landlock: Add binaries to .gitignore
  selftests/landlock: Test that MPTCP actions are not restricted
  selftests/landlock: Test TCP accesses with protocol=IPPROTO_TCP
  landlock: Fix non-TCP sockets restriction
  landlock: Minor typo and grammar fixes in IPC scoping documentation
  landlock: Fix grammar error
  selftests/landlock: Enable the new CONFIG_AF_UNIX_OOB
2025-02-26 11:55:44 -08:00
Linus Torvalds
9f5270d758 perf tools fixes for v6.14: 2nd batch
- Fix tools/ quiet build Makefile infrastructure that was broken when
   working on tools/perf/ without testing on other tools/ living
   utilities.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v6.14-2-2025-02-25' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix tools/ quiet build Makefile infrastructure that was broken when
   working on tools/perf/ without testing on other tools/ living
   utilities.

* tag 'perf-tools-fixes-for-v6.14-2-2025-02-25' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  tools: Remove redundant quiet setup
  tools: Unify top-level quiet infrastructure
2025-02-25 13:32:32 -08:00
Youling Tang
b4ae43b053 objtool: Add bch2_trans_unlocked_or_in_restart_error() to bcachefs noreturns
Fix the following objtool warning during build time:

  fs/bcachefs/btree_cache.o: warning: objtool: btree_node_lock.constprop.0() falls through to next function bch2_recalc_btree_reserve()
  fs/bcachefs/btree_update.o: warning: objtool: bch2_trans_update_get_key_cache() falls through to next function need_whiteout_for_snapshot()

bch2_trans_unlocked_or_in_restart_error() is an Obviously Correct (tm)
panic() wrapper, add it to the list of known noreturns.

Fixes: b318882022 ("bcachefs: bch2_trans_verify_not_unlocked_or_in_restart()")
Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: Youling Tang <tangyouling@kylinos.cn>
Reviewed-by: Kent Overstreet <kent.overstreet@linux.dev>
Link: https://lore.kernel.org/r/20250218064230.219997-1-youling.tang@linux.dev
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
2025-02-25 10:16:31 -08:00
Ard Biesheuvel
73cfc53cc3 objtool: Fix C jump table annotations for Clang
A C jump table (such as the one used by the BPF interpreter) is a const
global array of absolute code addresses, and this means that the actual
values in the table may not be known until the kernel is booted (e.g.,
when using KASLR or when the kernel VA space is sized dynamically).

When using PIE codegen, the compiler will default to placing such const
global objects in .data.rel.ro (which is annotated as writable), rather
than .rodata (which is annotated as read-only). As C jump tables are
explicitly emitted into .rodata, this used to result in warnings for
LoongArch builds (which uses PIE codegen for the entire kernel) like

  Warning: setting incorrect section attributes for .rodata..c_jump_table

due to the fact that the explicitly specified .rodata section inherited
the read-write annotation that the compiler uses for such objects when
using PIE codegen.

This warning was suppressed by explicitly adding the read-only
annotation to the __attribute__((section(""))) string, by commit

  c5b1184dec ("compiler.h: specify correct attribute for .rodata..c_jump_table")

Unfortunately, this hack does not work on Clang's integrated assembler,
which happily interprets the appended section type and permission
specifiers as part of the section name, which therefore no longer
matches the hard-coded pattern '.rodata..c_jump_table' that objtool
expects, causing it to emit a warning

  kernel/bpf/core.o: warning: objtool: ___bpf_prog_run+0x20: sibling call from callable instruction with modified stack frame

Work around this, by emitting C jump tables into .data.rel.ro instead,
which is treated as .rodata by the linker script for all builds, not
just PIE based ones.

Fixes: c5b1184dec ("compiler.h: specify correct attribute for .rodata..c_jump_table")
Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn> # on LoongArch
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250221135704.431269-6-ardb+git@google.com
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
2025-02-25 09:46:16 -08:00
Linus Torvalds
2a1944bff5 RISC-V Fixes for 6.14-rc5
* A fix for cacheinfo DT probing to avoid reading non-boolean properties
   as booleans.
 * A fix for cpufeature to use bitmap_equal() instead of memcmp(), so
   unused bits are ignored.
 * Fixes for cmpxchg and futex cmpxchg that properly encode the sign
   extension requirements on inline asm, which results in spurious
   successes.  This manifests in at least inode_set_ctime_current, but is
   likely just a disaster waiting to happen.
 * A fix for the rseq selftests, which was using an invalid constraint.
 * A pair of fixes for signal frame size handling:
     * We were reserving space for an extra empty extension context
       header on systems with extended signal context, thus resulting in
       unnecessarily large allocations.
     * We weren't properly checking for available extensions before
       calculating the signal stack size, which resulted in undersized
       stack allocations on some systems (at least those with T-Head
       custom vectors).
 
 Also, we've added Alex as a reviewer.  He's been helping out a ton
 lately, thanks!
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Merge tag 'riscv-for-linus-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A fix for cacheinfo DT probing to avoid reading non-boolean
   properties as booleans.

 - A fix for cpufeature to use bitmap_equal() instead of memcmp(), so
   unused bits are ignored.

 - Fixes for cmpxchg and futex cmpxchg that properly encode the sign
   extension requirements on inline asm, which results in spurious
   successes. This manifests in at least inode_set_ctime_current, but is
   likely just a disaster waiting to happen.

 - A fix for the rseq selftests, which was using an invalid constraint.

 - A pair of fixes for signal frame size handling:

     - We were reserving space for an extra empty extension context
       header on systems with extended signal context, thus resulting in
       unnecessarily large allocations.

     - We weren't properly checking for available extensions before
       calculating the signal stack size, which resulted in undersized
       stack allocations on some systems (at least those with T-Head
       custom vectors).

Also, we've added Alex as a reviewer.  He's been helping out a ton
lately, thanks!

* tag 'riscv-for-linus-6.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  MAINTAINERS: Add myself as a riscv reviewer
  riscv: signal: fix signal_minsigstksz
  riscv: signal: fix signal frame size
  rseq/selftests: Fix riscv rseq_offset_deref_addv inline asm
  riscv/futex: sign extend compare value in atomic cmpxchg
  riscv/atomic: Do proper sign extension also for unsigned in arch_cmpxchg
  riscv: cpufeature: use bitmap_equal() instead of memcmp()
  riscv: cacheinfo: Use of_property_present() for non-boolean properties
2025-02-24 16:40:32 -08:00
Jakub Kicinski
29b036be1b selftests: drv-net: test XDP, HDS auto and the ioctl path
Test XDP and HDS interaction. While at it add a test for using the IOCTL,
as that turned out to be the real culprit.

Testing bnxt:

  # NETIF=eth0 ./ksft-net-drv/drivers/net/hds.py
  KTAP version 1
  1..12
  ok 1 hds.get_hds
  ok 2 hds.get_hds_thresh
  ok 3 hds.set_hds_disable # SKIP disabling of HDS not supported by the device
  ok 4 hds.set_hds_enable
  ok 5 hds.set_hds_thresh_zero
  ok 6 hds.set_hds_thresh_max
  ok 7 hds.set_hds_thresh_gt
  ok 8 hds.set_xdp
  ok 9 hds.enabled_set_xdp
  ok 10 hds.ioctl
  ok 11 hds.ioctl_set_xdp
  ok 12 hds.ioctl_enabled_set_xdp
  # Totals: pass:11 fail:0 xfail:0 xpass:0 skip:1 error:0

and netdevsim:

  # ./ksft-net-drv/drivers/net/hds.py
  KTAP version 1
  1..12
  ok 1 hds.get_hds
  ok 2 hds.get_hds_thresh
  ok 3 hds.set_hds_disable
  ok 4 hds.set_hds_enable
  ok 5 hds.set_hds_thresh_zero
  ok 6 hds.set_hds_thresh_max
  ok 7 hds.set_hds_thresh_gt
  ok 8 hds.set_xdp
  ok 9 hds.enabled_set_xdp
  ok 10 hds.ioctl
  ok 11 hds.ioctl_set_xdp
  ok 12 hds.ioctl_enabled_set_xdp
  # Totals: pass:12 fail:0 xfail:0 xpass:0 skip:0 error:0

Netdevsim needs a sane default for tx/rx ring size.

ethtool 6.11 is needed for the --disable-netlink option.

Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Tested-by: Taehee Yoo <ap420073@gmail.com>
Link: https://patch.msgid.link/20250221025141.1132944-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-24 14:16:37 -08:00
Nicolas Frattaroli
d31babd7e3
ASoC: dapm-graph: set fill colour of turned on nodes
Some tools like KGraphViewer interpret the "ON" nodes not having an
explicitly set fill colour as them being entirely black, which obscures
the text on them and looks funny. In fact, I thought they were off for
the longest time. Comparing to the output of the `dot` tool, I assume
they are supposed to be white.

Instead of speclawyering over who's in the wrong and must immediately
atone for their wickedness at the altar of RFC2119, just be explicit
about it, set the fillcolor to white, and nobody gets confused.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patch.msgid.link/20250221-dapm-graph-node-colour-v1-1-514ed0aa7069@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2025-02-24 18:35:54 +00:00
Linus Torvalds
b8c8c1414f tracing fixes for v6.14:
Function graph accounting fixes:
 
 - Fix the manage ops hashes
 
   The function graph registers a "manager ops" and "sub-ops" to ftrace.
   The manager ops does not have any callback but calls the sub-ops
   callbacks. The manage ops hashes (what is used to tell ftrace what
   functions to attach to) is built on the sub-ops it manages.
 
   There was an error in the way it built the hash. An empty hash means to
   attach to all functions. When the manager ops had one sub-ops it properly
   copied its hash. But when the manager ops had more than one sub-ops, it
   went into a loop to make a set of all functions it needed to add to the
   hash. If any of the subops hashes was empty, that would mean to attach
   to all functions. The error was that the first iteration of the loop
   passed in an empty hash to start with in order to add the other hashes.
   That starting hash was mistaken as to attach to all functions. This made
   the manage ops attach to all functions whenever it had two or more
   sub-ops, even if each sub-op was attached to only a single function.
 
 - Do not add duplicate entries to the manager ops hash
 
   If two or more subops hashes trace the same function, an entry for that
   function will be added to the manager ops for each subops. This causes
   waste and extra overhead.
 
 Fprobe accounting fixes:
 
 - Remove last function from fprobe hash
 
   Fprobes has a ftrace hash to manage which functions an fprobe is attached
   to. It also has a counter of how many fprobes are attached. When the last
   fprobe is removed, it unregisters the fprobe from ftrace but does not
   remove the functions the last fprobe was attached to from the hash. This
   leaves the old functions attached. When a new fprobe is added, the fprobe
   infrastructure attaches to not only the functions of the new fprobe, but
   also to the functions of the last fprobe.
 
 - Fix accounting of the fprobe counter
 
   When a fprobe is added, it updates a counter. If the counter goes from
   zero to one, it attaches its ops to ftrace. When an fprobe is removed, the
   counter is decremented. If the counter goes from 1 to zero, it removes the
   fprobes ops from ftrace. There was an issue where if two fprobes trace the
   same function, the addition of each fprobe would increment the counter.
   But when removing the first of the fprobes, it would notice that another
   fprobe is still attached to one of its functions no it does not remove
   the functions from the ftrace ops. But it also did not decrement the
   counter. When the last fprobe is removed, the counter is still one. This
   leaves the fprobes callback still registered with ftrace and it being
   called by the functions defined by the fprobes ops hash.  Worse yet,
   because all the functions from the fprobe ops hash have been removed, that
   tells ftrace that it wants to trace all functions. Thus, this puts the
   state of the system where every function is calling the fprobe callback
   handler (which does nothing as there are no registered fprobes), but this
   causes a good 13% slow down of the entire system.
 
 Other updates:
 
 - Add a selftest to test the above issues to prevent regressions.
 
 - Fix preempt count accounting in function tracing
 
   Better recursion protection was added to function tracing which added
   another layer of preempt disable. As the preempt_count gets traced in the
   event, it needs to subtract the amount of preempt disabling the tracer
   does to record what the preempt_count was when the trace was triggered.
 
 - Fix memory leak in output of set_event
 
   A variable is passed by the seq_file functions in the location that is
   set by the return of the next() function. The start() function allocates
   it and the stop() function frees it. But when the last item is found, the
   next() returns NULL which leaks the data that was allocated in start().
   The m->private is used for something else, so have next() free the data
   when it returns NULL, as stop() will then just receive NULL in that case.
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Merge tag 'ftrace-v6.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Function graph accounting fixes:

   - Fix the manage ops hashes

     The function graph registers a "manager ops" and "sub-ops" to
     ftrace. The manager ops does not have any callback but calls the
     sub-ops callbacks. The manage ops hashes (what is used to tell
     ftrace what functions to attach to) is built on the sub-ops it
     manages.

     There was an error in the way it built the hash. An empty hash
     means to attach to all functions. When the manager ops had one
     sub-ops it properly copied its hash. But when the manager ops had
     more than one sub-ops, it went into a loop to make a set of all
     functions it needed to add to the hash. If any of the subops hashes
     was empty, that would mean to attach to all functions. The error
     was that the first iteration of the loop passed in an empty hash to
     start with in order to add the other hashes. That starting hash was
     mistaken as to attach to all functions. This made the manage ops
     attach to all functions whenever it had two or more sub-ops, even
     if each sub-op was attached to only a single function.

   - Do not add duplicate entries to the manager ops hash

     If two or more subops hashes trace the same function, an entry for
     that function will be added to the manager ops for each subops.
     This causes waste and extra overhead.

  Fprobe accounting fixes:

   - Remove last function from fprobe hash

     Fprobes has a ftrace hash to manage which functions an fprobe is
     attached to. It also has a counter of how many fprobes are
     attached. When the last fprobe is removed, it unregisters the
     fprobe from ftrace but does not remove the functions the last
     fprobe was attached to from the hash. This leaves the old functions
     attached. When a new fprobe is added, the fprobe infrastructure
     attaches to not only the functions of the new fprobe, but also to
     the functions of the last fprobe.

   - Fix accounting of the fprobe counter

     When a fprobe is added, it updates a counter. If the counter goes
     from zero to one, it attaches its ops to ftrace. When an fprobe is
     removed, the counter is decremented. If the counter goes from 1 to
     zero, it removes the fprobes ops from ftrace.

     There was an issue where if two fprobes trace the same function,
     the addition of each fprobe would increment the counter. But when
     removing the first of the fprobes, it would notice that another
     fprobe is still attached to one of its functions no it does not
     remove the functions from the ftrace ops.

     But it also did not decrement the counter, so when the last fprobe
     is removed, the counter is still one. This leaves the fprobes
     callback still registered with ftrace and it being called by the
     functions defined by the fprobes ops hash. Worse yet, because all
     the functions from the fprobe ops hash have been removed, that
     tells ftrace that it wants to trace all functions.

     Thus, this puts the state of the system where every function is
     calling the fprobe callback handler (which does nothing as there
     are no registered fprobes), but this causes a good 13% slow down of
     the entire system.

  Other updates:

   - Add a selftest to test the above issues to prevent regressions.

   - Fix preempt count accounting in function tracing

     Better recursion protection was added to function tracing which
     added another layer of preempt disable. As the preempt_count gets
     traced in the event, it needs to subtract the amount of preempt
     disabling the tracer does to record what the preempt_count was when
     the trace was triggered.

   - Fix memory leak in output of set_event

     A variable is passed by the seq_file functions in the location that
     is set by the return of the next() function. The start() function
     allocates it and the stop() function frees it. But when the last
     item is found, the next() returns NULL which leaks the data that
     was allocated in start(). The m->private is used for something
     else, so have next() free the data when it returns NULL, as stop()
     will then just receive NULL in that case"

* tag 'ftrace-v6.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing: Fix memory leak when reading set_event file
  ftrace: Correct preemption accounting for function tracing.
  selftests/ftrace: Update fprobe test to check enabled_functions file
  fprobe: Fix accounting of when to unregister from function graph
  fprobe: Always unregister fgraph function from ops
  ftrace: Do not add duplicate entries in subops manager ops
  ftrace: Fix accounting of adding subops to a manager ops
2025-02-22 09:03:54 -08:00
Steven Rostedt
e85c5e9792 selftests/ftrace: Update fprobe test to check enabled_functions file
A few bugs were found in the fprobe accounting logic along with it using
the function graph infrastructure. Update the fprobe selftest to catch
those bugs in case they or something similar shows up in the future.

The test now checks the enabled_functions file which shows all the
functions attached to ftrace or fgraph. When enabling a fprobe, make sure
that its corresponding function is also added to that file. Also add two
more fprobes to enable to make sure that the fprobe logic works properly
with multiple probes.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Link: https://lore.kernel.org/20250220202055.733001756@goodmis.org
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Tested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-02-21 09:36:12 -05:00
Linus Torvalds
319fc77f8f BPF fixes:
- Fix a soft-lockup in BPF arena_map_free on 64k page size
   kernels (Alan Maguire)
 
 - Fix a missing allocation failure check in BPF verifier's
   acquire_lock_state (Kumar Kartikeya Dwivedi)
 
 - Fix a NULL-pointer dereference in trace_kfree_skb by adding
   kfree_skb to the raw_tp_null_args set (Kuniyuki Iwashima)
 
 - Fix a deadlock when freeing BPF cgroup storage (Abel Wu)
 
 - Fix a syzbot-reported deadlock when holding BPF map's
   freeze_mutex (Andrii Nakryiko)
 
 - Fix a use-after-free issue in bpf_test_init when
   eth_skb_pkt_type is accessing skb data not containing an
   Ethernet header (Shigeru Yoshida)
 
 - Fix skipping non-existing keys in generic_map_lookup_batch
   (Yan Zhai)
 
 - Several BPF sockmap fixes to address incorrect TCP copied_seq
   calculations, which prevented correct data reads from recv(2)
   in user space (Jiayuan Chen)
 
 - Two fixes for BPF map lookup nullness elision (Daniel Xu)
 
 - Fix a NULL-pointer dereference from vmlinux BTF lookup in
   bpf_sk_storage_tracing_allowed (Jared Kangas)
 
 Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull BPF fixes from Daniel Borkmann:

 - Fix a soft-lockup in BPF arena_map_free on 64k page size kernels
   (Alan Maguire)

 - Fix a missing allocation failure check in BPF verifier's
   acquire_lock_state (Kumar Kartikeya Dwivedi)

 - Fix a NULL-pointer dereference in trace_kfree_skb by adding kfree_skb
   to the raw_tp_null_args set (Kuniyuki Iwashima)

 - Fix a deadlock when freeing BPF cgroup storage (Abel Wu)

 - Fix a syzbot-reported deadlock when holding BPF map's freeze_mutex
   (Andrii Nakryiko)

 - Fix a use-after-free issue in bpf_test_init when eth_skb_pkt_type is
   accessing skb data not containing an Ethernet header (Shigeru
   Yoshida)

 - Fix skipping non-existing keys in generic_map_lookup_batch (Yan Zhai)

 - Several BPF sockmap fixes to address incorrect TCP copied_seq
   calculations, which prevented correct data reads from recv(2) in user
   space (Jiayuan Chen)

 - Two fixes for BPF map lookup nullness elision (Daniel Xu)

 - Fix a NULL-pointer dereference from vmlinux BTF lookup in
   bpf_sk_storage_tracing_allowed (Jared Kangas)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  selftests: bpf: test batch lookup on array of maps with holes
  bpf: skip non exist keys in generic_map_lookup_batch
  bpf: Handle allocation failure in acquire_lock_state
  bpf: verifier: Disambiguate get_constant_map_key() errors
  bpf: selftests: Test constant key extraction on irrelevant maps
  bpf: verifier: Do not extract constant map keys for irrelevant maps
  bpf: Fix softlockup in arena_map_free on 64k page kernel
  net: Add rx_skb of kfree_skb to raw_tp_null_args[].
  bpf: Fix deadlock when freeing cgroup storage
  selftests/bpf: Add strparser test for bpf
  selftests/bpf: Fix invalid flag of recv()
  bpf: Disable non stream socket for strparser
  bpf: Fix wrong copied_seq calculation
  strparser: Add read_sock callback
  bpf: avoid holding freeze_mutex during mmap operation
  bpf: unify VM_WRITE vs VM_MAYWRITE use in BPF map mmaping logic
  selftests/bpf: Adjust data size to have ETH_HLEN
  bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()
  bpf: Remove unnecessary BTF lookups in bpf_sk_storage_tracing_allowed
2025-02-20 15:37:17 -08:00
Linus Torvalds
27eddbf344 Smaller than usual with no fixes from any subtree.
Current release - regressions:
 
   - core: fix race of rtnl_net_lock(dev_net(dev)).
 
 Previous releases - regressions:
 
   - core: remove the single page frag cache for good
 
   - flow_dissector: fix handling of mixed port and port-range keys
 
   - sched: cls_api: fix error handling causing NULL dereference
 
   - tcp:
     - adjust rcvq_space after updating scaling ratio
     - drop secpath at the same time as we currently drop dst
 
   - eth: gtp: suppress list corruption splat in gtp_net_exit_batch_rtnl().
 
 Previous releases - always broken:
 
   - vsock:
     - fix variables initialization during resuming
     - for connectible sockets allow only connected
 
   - eth: geneve: fix use-after-free in geneve_find_dev().
 
   - eth: ibmvnic: don't reference skb after sending to VIOS
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Smaller than usual with no fixes from any subtree.

  Current release - regressions:

   - core: fix race of rtnl_net_lock(dev_net(dev))

  Previous releases - regressions:

   - core: remove the single page frag cache for good

   - flow_dissector: fix handling of mixed port and port-range keys

   - sched: cls_api: fix error handling causing NULL dereference

   - tcp:
       - adjust rcvq_space after updating scaling ratio
       - drop secpath at the same time as we currently drop dst

   - eth: gtp: suppress list corruption splat in gtp_net_exit_batch_rtnl().

  Previous releases - always broken:

   - vsock:
       - fix variables initialization during resuming
       - for connectible sockets allow only connected

   - eth:
       - geneve: fix use-after-free in geneve_find_dev()
       - ibmvnic: don't reference skb after sending to VIOS"

* tag 'net-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (34 commits)
  Revert "net: skb: introduce and use a single page frag cache"
  net: allow small head cache usage with large MAX_SKB_FRAGS values
  nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
  tcp: drop secpath at the same time as we currently drop dst
  net: axienet: Set mac_managed_pm
  arp: switch to dev_getbyhwaddr() in arp_req_set_public()
  net: Add non-RCU dev_getbyhwaddr() helper
  sctp: Fix undefined behavior in left shift operation
  selftests/bpf: Add a specific dst port matching
  flow_dissector: Fix port range key handling in BPF conversion
  selftests/net/forwarding: Add a test case for tc-flower of mixed port and port-range
  flow_dissector: Fix handling of mixed port and port-range keys
  geneve: Suppress list corruption splat in geneve_destroy_tunnels().
  gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().
  dev: Use rtnl_net_dev_lock() in unregister_netdev().
  net: Fix dev_net(dev) race in unregister_netdevice_notifier_dev_net().
  net: Add net_passive_inc() and net_passive_dec().
  net: pse-pd: pd692x0: Fix power limit retrieval
  MAINTAINERS: trim the GVE entry
  gve: set xdp redirect target only when it is available
  ...
2025-02-20 10:19:54 -08:00
Cong Wang
15de6ba95d selftests/bpf: Add a specific dst port matching
After this patch:

 #102/1   flow_dissector_classification/ipv4:OK
 #102/2   flow_dissector_classification/ipv4_continue_dissect:OK
 #102/3   flow_dissector_classification/ipip:OK
 #102/4   flow_dissector_classification/gre:OK
 #102/5   flow_dissector_classification/port_range:OK
 #102/6   flow_dissector_classification/ipv6:OK
 #102     flow_dissector_classification:OK
 Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://patch.msgid.link/20250218043210.732959-5-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:59 -08:00
Cong Wang
dfc1580f96 selftests/net/forwarding: Add a test case for tc-flower of mixed port and port-range
After this patch:

 # ./tc_flower_port_range.sh
 TEST: Port range matching - IPv4 UDP                                [ OK ]
 TEST: Port range matching - IPv4 TCP                                [ OK ]
 TEST: Port range matching - IPv6 UDP                                [ OK ]
 TEST: Port range matching - IPv6 TCP                                [ OK ]
 TEST: Port range matching - IPv4 UDP Drop                           [ OK ]

Cc: Qiang Zhang <dtzq01@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20250218043210.732959-3-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:59 -08:00
Yan Zhai
d66b773917 selftests: bpf: test batch lookup on array of maps with holes
Iterating through array of maps may encounter non existing keys. The
batch operation should not fail on when this happens.

Signed-off-by: Yan Zhai <yan@cloudflare.com>
Acked-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/9007237b9606dc2ee44465a4447fe46e13f3bea6.1739171594.git.yan@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-02-18 17:27:37 -08:00
Charlie Jenkins
42367eca76 tools: Remove redundant quiet setup
Q is exported from Makefile.include so it is not necessary to manually
set it.

Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <qmo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Benjamin Tissoires <bentiss@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Lukasz Luba <lukasz.luba@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Mykola Lysenko <mykolal@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20250213-quiet_tools-v3-2-07de4482a581@rivosinc.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-02-18 16:27:43 -03:00
Charlie Jenkins
293f324ce9 tools: Unify top-level quiet infrastructure
Commit f2868b1a66 ("perf tools: Expose quiet/verbose variables in
Makefile.perf") moved the quiet infrastructure out of
tools/build/Makefile.build and into the top-level Makefile.perf file so
that the quiet infrastructure could be used throughout perf and not just
in Makefile.build.

Extract out the quiet infrastructure into Makefile.include so that it
can be leveraged outside of perf.

Fixes: f2868b1a66 ("perf tools: Expose quiet/verbose variables in Makefile.perf")
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Benjamin Tissoires <bentiss@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Lukasz Luba <lukasz.luba@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Mykola Lysenko <mykolal@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Monnet <qmo@kernel.org>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20250213-quiet_tools-v3-1-07de4482a581@rivosinc.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-02-18 15:31:45 -03:00
Michal Luczaj
85928e9c43 selftest/bpf: Add vsock test for sockmap rejecting unconnected
Verify that for a connectible AF_VSOCK socket, merely having a transport
assigned is insufficient; socket must be connected for the sockmap to
accept.

This does not test datagram vsocks. Even though it hardly matters. VMCI is
the only transport that features VSOCK_TRANSPORT_F_DGRAM, but it has an
unimplemented vsock_transport::readskb() callback, making it unsupported by
BPF/sockmap.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-18 12:00:01 +01:00
Michal Luczaj
8350695bfb selftest/bpf: Adapt vsock_delete_on_close to sockmap rejecting unconnected
Commit 515745445e ("selftest/bpf: Add test for vsock removal from sockmap
on close()") added test that checked if proto::close() callback was invoked
on AF_VSOCK socket release. I.e. it verified that a close()d vsock does
indeed get removed from the sockmap.

It was done simply by creating a socket pair and attempting to replace a
close()d one with its peer. Since, due to a recent change, sockmap does not
allow updating index with a non-established connectible vsock, redo it with
a freshly established one.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-18 12:00:01 +01:00
Mark Brown
5dcf52e2ce selftests/mm: fix check for running THP tests
When testing if we should try to compact memory or drop caches before we
run the THP or HugeTLB tests we use | as an or operator.  This doesn't
work since run_vmtests.sh is written in shell where this is used to pipe
the output of the first argument into the second.  Instead use the shell's
-o operator.

Link: https://lkml.kernel.org/r/20250212-kselftest-mm-no-hugepages-v1-1-44702f538522@kernel.org
Fixes: b433ffa8db ("selftests: mm: perform some system cleanup before using hugepages")
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Nico Pache <npache@redhat.com>
Cc: Mariano Pache <npache@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-17 22:40:04 -08:00
Wang Yaxin
2272dbc471 getdelays: fix error format characters
getdelays had a compilation issue because the format string was not
updated when the "delay min" was added.  For example, after adding the
"delay min" in printf, there were 7 strings but only 6 "%s" format
specifiers.  Similarly, after adding the 't->cpu_delay_total', there were
7 variables but only 6 format characters specifiers, causing compilation
issues as follows.  This commit fixes these issues to ensure that
getdelays compiles correctly.

root@xx:~/linux-next/tools/accounting$ make
getdelays.c:199:9: warning: format `%llu' expects argument of type
`long long unsigned int', but argument 8 has type `char *' [-Wformat=]
  199 |  printf("\n\nCPU   %15s%15s%15s%15s%15s%15s\n"
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.....
  216 |         "delay total", "delay average", "delay max", "delay min",
      |                                                      ~~~~~~~~~~~
      |                                                      |
      |                                                      char *
getdelays.c:200:21: note: format string is defined here
  200 |         "      %15llu%15llu%15llu%15llu%15.3fms%13.6fms\n"
      |                ~~~~~^
      |                     |
      |                     long long unsigned int
      |                %15s
getdelays.c:199:9: warning: format `%f' expects argument of type
`double', but argument 12 has type `long long unsigned int' [-Wformat=]
  199 |  printf("\n\nCPU   %15s%15s%15s%15s%15s%15s\n"
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.....
  220 |         (unsigned long long)t->cpu_delay_total,
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |         |
      |         long long unsigned int
.....

Link: https://lkml.kernel.org/r/20250208144400544RduNRhwIpT3m2JyRBqskZ@zte.com.cn
Fixes: f65c64f311 ("delayacct: add delay min to record delay peak")
Reviewed-by: xu xin <xu.xin16@zte.com.cn>
Signed-off-by: Wang Yaxin <wang.yaxin@zte.com.cn>
Signed-off-by: Kun Jiang <jiang.kun2@zte.com.cn>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Fan Yu <fan.yu9@zte.com.cn>
Cc: Peilin He <he.peilin@zte.com.cn>
Cc: Qiang Tu <tu.qiang35@zte.com.cn>
Cc: wangyong <wang.yong12@zte.com.cn>
Cc: ye xingchen <ye.xingchen@zte.com.cn>
Cc: Yunkai Zhang <zhang.yunkai@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-17 22:40:02 -08:00
Florian Fainelli
035d3c7787 tools/mm: fix build warnings with musl-libc
musl-libc warns about the following:

/home/florian/dev/buildroot/output/arm64/rpi4-b/host/aarch64-buildroot-linux-musl/sysroot/usr/include/sys/errno.h:1:2: attention: #warning redirecting incorrect #include <sys/errno.h> to <errno.h> [-Wcpp]
    1 | #warning redirecting incorrect #include <sys/errno.h> to <errno.h>
      |  ^~~~~~~
/home/florian/dev/buildroot/output/arm64/rpi4-b/host/aarch64-buildroot-linux-musl/sysroot/usr/include/sys/fcntl.h:1:2: attention: #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> [-Wcpp]
    1 | #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h>
      |  ^~~~~~~

include errno.h and fcntl.h directly.

Link: https://lkml.kernel.org/r/20250210200518.1137295-1-florian.fainelli@broadcom.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-17 22:40:02 -08:00
Linus Torvalds
592c358ea9 - Move a warning about a lld.ld breakage into the verbose setting as said
breakage has been fixed in the meantime
 
 - Teach objtool to ignore dangling jump table entries added by Clang
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Merge tag 'objtool_urgent_for_v6.14_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fixes from Borislav Petkov:

 - Move a warning about a lld.ld breakage into the verbose setting as
   said breakage has been fixed in the meantime

 - Teach objtool to ignore dangling jump table entries added by Clang

* tag 'objtool_urgent_for_v6.14_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Move dodgy linker warn to verbose
  objtool: Ignore dangling jump table entries
2025-02-16 10:30:58 -08:00
Linus Torvalds
82ff316456 ARM:
- Large set of fixes for vector handling, specially in the interactions
   between host and guest state. This fixes a number of bugs affecting
   actual deployments, and greatly simplifies the FP/SIMD/SVE handling.
   Thanks to Mark Rutland for dealing with this thankless task.
 
 - Fix an ugly race between vcpu and vgic creation/init, resulting in
   unexpected behaviours.
 
 - Fix use of kernel VAs at EL2 when emulating timers with nVHE.
 
 - Small set of pKVM improvements and cleanups.
 
 x86:
 
 - Fix broken SNP support with KVM module built-in, ensuring the PSP
   module is initialized before KVM even when the module infrastructure
   cannot be used to order initcalls
 
 - Reject Hyper-V SEND_IPI hypercalls if the local APIC isn't being emulated
   by KVM to fix a NULL pointer dereference.
 
 - Enter guest mode (L2) from KVM's perspective before initializing the vCPU's
   nested NPT MMU so that the MMU is properly tagged for L2, not L1.
 
 - Load the guest's DR6 outside of the innermost .vcpu_run() loop, as the
   guest's value may be stale if a VM-Exit is handled in the fastpath.
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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:

   - Large set of fixes for vector handling, especially in the
     interactions between host and guest state.

     This fixes a number of bugs affecting actual deployments, and
     greatly simplifies the FP/SIMD/SVE handling. Thanks to Mark Rutland
     for dealing with this thankless task.

   - Fix an ugly race between vcpu and vgic creation/init, resulting in
     unexpected behaviours

   - Fix use of kernel VAs at EL2 when emulating timers with nVHE

   - Small set of pKVM improvements and cleanups

  x86:

   - Fix broken SNP support with KVM module built-in, ensuring the PSP
     module is initialized before KVM even when the module
     infrastructure cannot be used to order initcalls

   - Reject Hyper-V SEND_IPI hypercalls if the local APIC isn't being
     emulated by KVM to fix a NULL pointer dereference

   - Enter guest mode (L2) from KVM's perspective before initializing
     the vCPU's nested NPT MMU so that the MMU is properly tagged for
     L2, not L1

   - Load the guest's DR6 outside of the innermost .vcpu_run() loop, as
     the guest's value may be stale if a VM-Exit is handled in the
     fastpath"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (25 commits)
  x86/sev: Fix broken SNP support with KVM module built-in
  KVM: SVM: Ensure PSP module is initialized if KVM module is built-in
  crypto: ccp: Add external API interface for PSP module initialization
  KVM: arm64: vgic: Hoist SGI/PPI alloc from vgic_init() to kvm_create_vgic()
  KVM: arm64: timer: Drop warning on failed interrupt signalling
  KVM: arm64: Fix alignment of kvm_hyp_memcache allocations
  KVM: arm64: Convert timer offset VA when accessed in HYP code
  KVM: arm64: Simplify warning in kvm_arch_vcpu_load_fp()
  KVM: arm64: Eagerly switch ZCR_EL{1,2}
  KVM: arm64: Mark some header functions as inline
  KVM: arm64: Refactor exit handlers
  KVM: arm64: Refactor CPTR trap deactivation
  KVM: arm64: Remove VHE host restore of CPACR_EL1.SMEN
  KVM: arm64: Remove VHE host restore of CPACR_EL1.ZEN
  KVM: arm64: Remove host FPSIMD saving for non-protected KVM
  KVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state
  KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop
  KVM: nSVM: Enter guest mode before initializing nested NPT MMU
  KVM: selftests: Add CPUID tests for Hyper-V features that need in-kernel APIC
  KVM: selftests: Manage CPUID array in Hyper-V CPUID test's core helper
  ...
2025-02-16 10:25:12 -08:00
Linus Torvalds
243899076c Rust fixes for v6.14 (2nd)
Toolchain and infrastructure:
 
  - Fix objtool warning due to future Rust 1.85.0 (to be released in
    a few days).
 
  - Clean future Rust 1.86.0 (to be released 2025-04-03) Clippy warning.
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Merge tag 'rust-fixes-6.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

Pull rust fixes from Miguel Ojeda:

 - Fix objtool warning due to future Rust 1.85.0 (to be released in a
   few days)

 - Clean future Rust 1.86.0 (to be released 2025-04-03) Clippy warning

* tag 'rust-fixes-6.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux:
  rust: rbtree: fix overindented list item
  objtool/rust: add one more `noreturn` Rust function
2025-02-15 09:54:46 -08:00
Stafford Horne
713e788c0e
rseq/selftests: Fix riscv rseq_offset_deref_addv inline asm
When working on OpenRISC support for restartable sequences I noticed
and fixed these two issues with the riscv support bits.

 1 The 'inc' argument to RSEQ_ASM_OP_R_DEREF_ADDV was being implicitly
   passed to the macro.  Fix this by adding 'inc' to the list of macro
   arguments.
 2 The inline asm input constraints for 'inc' and 'off' use "er",  The
   riscv gcc port does not have an "e" constraint, this looks to be
   copied from the x86 port.  Fix this by just using an "r" constraint.

I have compile tested this only for riscv.  However, the same fixes I
use in the OpenRISC rseq selftests and everything passes with no issues.

Fixes: 171586a6ab ("selftests/rseq: riscv: Template memory ordering and percpu access mode")
Signed-off-by: Stafford Horne <shorne@gmail.com>
Tested-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250114170721.3613280-1-shorne@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2025-02-14 13:06:36 -08:00
Linus Torvalds
04f41cbf03 sched_ext: Fixes for v6.14-rc2
- Fix lock imbalance in a corner case of dispatch_to_local_dsq().
 
 - Migration disabled tasks were confusing some BPF schedulers and its
   handling had a bug. Fix it and simplify the default behavior by
   dispatching them automatically.
 
 - ops.tick(), ops.disable() and ops.exit_task() were incorrectly disallowing
   kfuncs that require the task argument to be the rq operation is currently
   operating on and thus is rq-locked. Allow them.
 
 - Fix autogroup migration handling bug which was occasionally triggering a
   warning in the cgroup migration path.
 
 - tools/sched_ext, selftest and other misc updates.
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Merge tag 'sched_ext-for-6.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

Pull sched_ext fixes from Tejun Heo:

 - Fix lock imbalance in a corner case of dispatch_to_local_dsq()

 - Migration disabled tasks were confusing some BPF schedulers and its
   handling had a bug. Fix it and simplify the default behavior by
   dispatching them automatically

 - ops.tick(), ops.disable() and ops.exit_task() were incorrectly
   disallowing kfuncs that require the task argument to be the rq
   operation is currently operating on and thus is rq-locked.
   Allow them.

 - Fix autogroup migration handling bug which was occasionally
   triggering a warning in the cgroup migration path

 - tools/sched_ext, selftest and other misc updates

* tag 'sched_ext-for-6.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
  sched_ext: Use SCX_CALL_OP_TASK in task_tick_scx
  sched_ext: Fix the incorrect bpf_list kfunc API in common.bpf.h.
  sched_ext: selftests: Fix grammar in tests description
  sched_ext: Fix incorrect assumption about migration disabled tasks in task_can_run_on_remote_rq()
  sched_ext: Fix migration disabled handling in targeted dispatches
  sched_ext: Implement auto local dispatching of migration disabled tasks
  sched_ext: Fix incorrect time delta calculation in time_delta()
  sched_ext: Fix lock imbalance in dispatch_to_local_dsq()
  sched_ext: selftests/dsp_local_on: Fix selftest on UP systems
  tools/sched_ext: Add helper to check task migration state
  sched_ext: Fix incorrect autogroup migration detection
  sched_ext: selftests/dsp_local_on: Fix sporadic failures
  selftests/sched_ext: Fix enum resolution
  sched_ext: Include task weight in the error state dump
  sched_ext: Fixes typos in comments
2025-02-14 11:14:24 -08:00
Linus Torvalds
80868f5d3d cgroup: Fixes for v6.14-rc2
- Fix a race window where a newly forked task could escape cgroup.kill.
 
 - Remove incorrectly included steal time from cpu.stat::usage_usec.
 
 - Minor update in selftest.
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Merge tag 'cgroup-for-6.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - Fix a race window where a newly forked task could escape cgroup.kill

 - Remove incorrectly included steal time from cpu.stat::usage_usec

 - Minor update in selftest

* tag 'cgroup-for-6.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Remove steal time from usage_usec
  selftests/cgroup: use bash in test_cpuset_v1_hp.sh
  cgroup: fix race between fork and cgroup.kill
2025-02-14 11:00:42 -08:00
Bharadwaj Raju
78332fdb95
selftests/landlock: Add binaries to .gitignore
Building the test creates binaries 'wait-pipe' and
'sandbox-and-launch' which need to be gitignore'd.

Signed-off-by: Bharadwaj Raju <bharadwaj.raju777@gmail.com>
Link: https://lore.kernel.org/r/20250210161101.6024-1-bharadwaj.raju777@gmail.com
[mic: Sort entries]
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2025-02-14 09:23:11 +01:00
Mikhail Ivanov
3d4033985f
selftests/landlock: Test that MPTCP actions are not restricted
Extend protocol fixture with test suits for MPTCP protocol.
Add CONFIG_MPTCP and CONFIG_MPTCP_IPV6 options in config.

Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Link: https://lore.kernel.org/r/20250205093651.1424339-4-ivanov.mikhail1@huawei-partners.com
Cc: <stable@vger.kernel.org> # 6.7.x
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2025-02-14 09:23:10 +01:00
Mikhail Ivanov
f5534d511b
selftests/landlock: Test TCP accesses with protocol=IPPROTO_TCP
Extend protocol_variant structure with protocol field (Cf. socket(2)).

Extend protocol fixture with TCP test suits with protocol=IPPROTO_TCP
which can be used as an alias for IPPROTO_IP (=0) in socket(2).

Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Link: https://lore.kernel.org/r/20250205093651.1424339-3-ivanov.mikhail1@huawei-partners.com
Cc: <stable@vger.kernel.org> # 6.7.x
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2025-02-14 09:23:09 +01:00
Mickaël Salaün
89cb121e94
selftests/landlock: Enable the new CONFIG_AF_UNIX_OOB
Since commit 5155cbcdbf ("af_unix: Add a prompt to
CONFIG_AF_UNIX_OOB"), the Landlock selftests's configuration is not
enough to build a minimal kernel.  Because scoped_signal_test checks
with the MSG_OOB flag, we need to enable CONFIG_AF_UNIX_OOB for tests:

 #  RUN           fown.no_sandbox.sigurg_socket ...
 # scoped_signal_test.c:420:sigurg_socket:Expected 1 (1) == send(client_socket, ".", 1, MSG_OOB) (-1)
 # sigurg_socket: Test terminated by assertion
 #          FAIL  fown.no_sandbox.sigurg_socket
 ...

Cc: Günther Noack <gnoack@google.com>
Acked-by: Florent Revest <revest@chromium.org>
Link: https://lore.kernel.org/r/20250211132531.1625566-1-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2025-02-14 09:23:06 +01:00