Commit graph

172,738 commits

Author SHA1 Message Date
David Laight
af4e9ef3d7 uaccess: Fix scoped_user_read_access() for 'pointer to const'
If a 'const struct foo __user *ptr' is used for the address passed to
scoped_user_read_access() then you get a warning/error

  uaccess.h:691:1: error: initialization discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]

for the

  void __user *_tmpptr = __scoped_user_access_begin(mode, uptr, size, elbl)

assignment.

Fix by using 'auto' for both _tmpptr and the redeclaration of uptr.
Replace the CLASS() with explicit __cleanup() functions on uptr.

Fixes: e497310b4f ("uaccess: Provide scoped user access regions")
Signed-off-by: David Laight <david.laight.linux@gmail.com>
Reviewed-and-tested-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-03-02 09:24:32 -08:00
Linus Torvalds
949d0a46ad Arm:
* Make sure we don't leak any S1POE state from guest to guest when
   the feature is supported on the HW, but not enabled on the host
 
 * Propagate the ID registers from the host into non-protected VMs
   managed by pKVM, ensuring that the guest sees the intended feature set
 
 * Drop double kern_hyp_va() from unpin_host_sve_state(), which could
   bite us if we were to change kern_hyp_va() to not being idempotent
 
 * Don't leak stage-2 mappings in protected mode
 
 * Correctly align the faulting address when dealing with single page
   stage-2 mappings for PAGE_SIZE > 4kB
 
 * Fix detection of virtualisation-capable GICv5 IRS, due to the
   maintainer being obviously fat fingered... [his words, not mine]
 
 * Remove duplication of code retrieving the ASID for the purpose of
   S1 PT handling
 
 * Fix slightly abusive const-ification in vgic_set_kvm_info()
 
 Generic:
 
 * Remove internal Kconfigs that are now set on all architectures.
 
 * Remove per-architecture code to enable KVM_CAP_SYNC_MMU, all
   architectures finally enable it in Linux 7.0.
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCgAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmmkSMUUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroO2tggAgOHvH9lwgHxFADAOKXPEsv+Tw6cB
 zuUBPo6e5XQQx6BJQVo8ctveCBbA0ybRJXbju6lgS/Bg9qQYKjZbNrYdKwBwhw3b
 JBUFTIJgl7lLU5gEANNtvgiiNUc2z1GfG8NQ5ovMJ0/MDEEI0YZjkGoe8ZyJ54vg
 qrNHBROKvt54wVHXFGhZ1z8u4RqJ/WCmy21wYbwiMgQGXq9ugRRfhnu3iGNO8BcK
 bSSh4cP7qusO5Nj0m/XYD/68VwvyogaEkh4sNS1VH0FOoONRWs80Q6iT2HjCGgv6
 mAzCx/yB9ziSQRis3oYYEBH23HZxRVDVBeSBlPcbxE3VM7SGzp7O8L692g==
 =+mC+
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Arm:

   - Make sure we don't leak any S1POE state from guest to guest when
     the feature is supported on the HW, but not enabled on the host

   - Propagate the ID registers from the host into non-protected VMs
     managed by pKVM, ensuring that the guest sees the intended feature
     set

   - Drop double kern_hyp_va() from unpin_host_sve_state(), which could
     bite us if we were to change kern_hyp_va() to not being idempotent

   - Don't leak stage-2 mappings in protected mode

   - Correctly align the faulting address when dealing with single page
     stage-2 mappings for PAGE_SIZE > 4kB

   - Fix detection of virtualisation-capable GICv5 IRS, due to the
     maintainer being obviously fat fingered... [his words, not mine]

   - Remove duplication of code retrieving the ASID for the purpose of
     S1 PT handling

   - Fix slightly abusive const-ification in vgic_set_kvm_info()

  Generic:

   - Remove internal Kconfigs that are now set on all architectures

   - Remove per-architecture code to enable KVM_CAP_SYNC_MMU, all
     architectures finally enable it in Linux 7.0"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: always define KVM_CAP_SYNC_MMU
  KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER
  KVM: arm64: Deduplicate ASID retrieval code
  irqchip/gic-v5: Fix inversion of IRS_IDR0.virt flag
  KVM: arm64: Revert accidental drop of kvm_uninit_stage2_mmu() for non-NV VMs
  KVM: arm64: Fix protected mode handling of pages larger than 4kB
  KVM: arm64: vgic: Handle const qualifier from gic_kvm_info allocation type
  KVM: arm64: Remove redundant kern_hyp_va() in unpin_host_sve_state()
  KVM: arm64: Fix ID register initialization for non-protected pKVM guests
  KVM: arm64: Optimise away S1POE handling when not supported by host
  KVM: arm64: Hide S1POE from guests when not supported by the host
2026-03-01 15:34:47 -08:00
Linus Torvalds
f6542af922 Improve the inlining of jiffies_to_msecs() and jiffies_to_usecs(),
for the common HZ=100, 250 or 1000 cases, only inlining them
 for odd HZ values like HZ=300.
 
 The inlining overhead showed up in performance tests of the TCP code.
 
 (Marked as an RFC pull request, as it's not a regression.)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmmkA94RHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1ggmhAAqvNgH1vG+Ad1/r2aZ0iQNOJ3lLL9DKVU
 V0Q2iXiRPKvzjXaHB+C2B2GkGgBBxyvdl1wGPpknI/OkoC8aBzK8jSchmfLFfWdx
 C1MC0xoZRtaWDQaMYYQ83ZGQqdKHct4ZrwfsPu+g95NGvNg3m/W8p3cZjruknvH3
 bKZmbN2wQiSx6+PB7/FkEjV7eAlaskYYdKLNqZzd/62oQ6is4ppAjEAp+X/FidJv
 0lUVr7ILx6lZHjWnavUjex2iSvvZ8XqiaYVKlj5EE9cCaPhXDTpkaO8l/ELcjpHL
 ZBBV6rpbDo7+Mo3UnUiz+CaYi6XAAOwgj6wZBiBXhVQUAW0PIlMaefDjccWFlDw1
 oAcRCg5i3KF8cvrfQYUs4519W52eWOThqQ1fs5ql6P6ycHZ0KTsmaRAbNih811RN
 A2VMTkiyX25bXOUQ9e5Y7cYOvDMGGCWiocT6C7Is9gZQMfkj92NDCKURLwRYzzBr
 2XDjg46YekGXwy8OamMwXMRcdyUC5fAIaWOaq7IL1K3cgbS2qbZx55Y85+AOfngF
 DvFWDIfjslYMZqzQQ+4+MaJitRQ2V6CqdOP3kQbJ3Z6DmIcwi7DkOzqH1hEglb7O
 IjXCxjxosZv4iofpxr0FKJPx7KBVSzzxezjMLzeijM+zDdbF4GWFpqRD1ONh/4vm
 /1tfaC6TU/E=
 =duTI
 -----END PGP SIGNATURE-----

Merge tag 'timers-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fix from Ingo Molnar:
 "Improve the inlining of jiffies_to_msecs() and jiffies_to_usecs(), for
  the common HZ=100, 250 or 1000 cases. Only use a function call for odd
  HZ values like HZ=300 that generate more code.

  The function call overhead showed up in performance tests of the TCP
  code"

* tag 'timers-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time/jiffies: Inline jiffies_to_msecs() and jiffies_to_usecs()
2026-03-01 12:15:58 -08:00
Linus Torvalds
6170625149 Miscellaneous fixes:
- Fix zero_vruntime tracking when there's a single task running
 
  - Fix slice protection logic
 
  - Fix the ->vprot logic for reniced tasks
 
  - Fix lag clamping in mixed slice workloads
 
  - Fix objtool uaccess warning (and bug) in the
    !CONFIG_RSEQ_SLICE_EXTENSION case caused by unexpected
    un-inlining, which triggers with older compilers
 
  - Fix a comment in the rseq registration rseq_size bound check code
 
  - Fix a legacy RSEQ ABI quirk that handled 32-byte area sizes
    differently, which special size we now reached naturally and
    want to avoid. The visible ugliness of the new reserved field
    will be avoided the next time the RSEQ area is extended.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmmkAl0RHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1hdsg/+IdQpmtEXsugE1FqEuuptm0ld6hcFI9WC
 mlEXhid5Gq3a3KMBv0CLd73o+k8Ju/BDEdbfLMzY8A9h8OxfnuUL1T6Jt4q7dF1h
 76ja1R+i+GNFcXWmSG8z6FUns4bRBJeNWFs3dzCFE9N2qOCCj1xBr/9BqgKvNVfZ
 cbcaiMvmi3z/vPUmT8hdMdEcA0Zo2gVcKDmny4Tca9sigyLZD8FqtW1FhqL1HX8H
 Cx8fZ2lkD2z6gKtOAbC3QuWVmP88tvZldaMsGHTAQIa14PP5h2xhyuLxBF1Zjnwy
 aWl4iYr6ILu3LRi54CmQOiESdEf3Srdbl8JxDcvU9vh8ecqXvDGPUB2xCszlPvOx
 R+scskNgNyd1WtUF2VYFLTNkj0B7Xe6eTYfIu2d5r8GrRt0YjRzsK/JQallAkV6V
 KORDm4/Xyl5Ss6tNtfZP7lpHD2qykscRGxgr0HjjJCyjA1ZNtGc1A+JKZ8D8q9Nq
 rxEbaa65KfAtYJ4i5j9goFPQwNeHXm/emToVzEfyKwZHs3ns0LwffDGSFFOYSm/p
 FVVmi9iSoxRvRFHBflvBIwFaCnIyBLTJZlB/Bp8MVaFnv+6OzdE/nfcKNaYqcVaT
 mzCpY2DFTx5KISmJR7DAWsPntoRV6WPcxVApWicTaT5G3C2TLvvTAEq8g2WIYDFB
 j6oNyEkX/Xw=
 =Nxqx
 -----END PGP SIGNATURE-----

Merge tag 'sched-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:

 - Fix zero_vruntime tracking when there's a single task running

 - Fix slice protection logic

 - Fix the ->vprot logic for reniced tasks

 - Fix lag clamping in mixed slice workloads

 - Fix objtool uaccess warning (and bug) in the
   !CONFIG_RSEQ_SLICE_EXTENSION case caused by unexpected un-inlining,
   which triggers with older compilers

 - Fix a comment in the rseq registration rseq_size bound check code

 - Fix a legacy RSEQ ABI quirk that handled 32-byte area sizes
   differently, which special size we now reached naturally and want to
   avoid. The visible ugliness of the new reserved field will be avoided
   the next time the RSEQ area is extended.

* tag 'sched-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rseq: slice ext: Ensure rseq feature size differs from original rseq size
  rseq: Clarify rseq registration rseq_size bound check comment
  sched/core: Fix wakeup_preempt's next_class tracking
  rseq: Mark rseq_arm_slice_extension_timer() __always_inline
  sched/fair: Fix lag clamp
  sched/eevdf: Update se->vprot in reweight_entity()
  sched/fair: Only set slice protection at pick time
  sched/fair: Fix zero_vruntime tracking
2026-03-01 11:09:24 -08:00
Linus Torvalds
afa844360b Miscellaneous irqchip driver fixes:
- Fix frozen interrupt bug in the sifive-plic driver
 
  - Limit per-device MSI interrupts on uncommon gic-v3-its
    hardware variants
 
  - Address Sparse warning by constifying a variable in
    the MMP driver
 
  - Revert broken commit and also fix an error check
    in the ls-extirq driver
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmmj/MMRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1iRdg//eKX6ScDG6IT/hzKHBVP9tGqFcvfR+LWf
 3Q5I/5YipYNf2aqZS7UFcfhsOvMkwALF55CrNUCFatW2W4VAUR5pgt5JWNfMS4VO
 +9sGkkAhUenhLlGgGnIpuIHgIrkJFCqhQIy2pwMpVF5Sp/7jzJfIwonYziv3UUyD
 cWhv6zQULWFMzkLOjBC8Ba44gIfSSq6wERE0JZiE2aZMJ3Azjh+prKwkH5Q48adb
 Ni7b19wFFLDSvv8KGzpoFrA3S5Wwzppy4YJpTEKGXUq9AQr08BUtv2KNeLz660ma
 pWD9ZzPnclxUiWhmAdi3x+vmn8209Id3pYRGD2auZlT0+7cE1yvyFNl30IWwac5K
 IoGQ54F3nWYynT6ScYNJilKlN/kDDX6Azt1AELl+fHhOvp5VpjxlDpiUahvqJGpX
 bhNo1GC8fQSZFKehA987IZol1vp9z2utqxEQhm0hZX4FhIRaS8LfUa1e7A66FZ1Q
 cp+Hz/8oYczZAEb3vXNdEVkhtIFTzS90uRhrjaRLlO67Yo/0xWxwP34DuBv8MiL7
 XWK+rj3TSxYR3U6cAIAkU0bft+XFIVI8fKc92duE2Cx5Nx2s0gHRYsM/F2lFrhIw
 jETLC60lWj1Sf1HP03VKi7EjFht6qSVs4PgPVYopZtn94eXV+HK+sZ5CmkxqgfFT
 OYpG1VbMxEU=
 =hIKS
 -----END PGP SIGNATURE-----

Merge tag 'irq-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irqchip driver fixes from Ingo Molnar:

 - Fix frozen interrupt bug in the sifive-plic driver

 - Limit per-device MSI interrupts on uncommon gic-v3-its hardware
   variants

 - Address Sparse warning by constifying a variable in the MMP driver

 - Revert broken commit and also fix an error check in the ls-extirq
   driver

* tag 'irq-urgent-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/ls-extirq: Fix devm_of_iomap() error check
  Revert "irqchip/ls-extirq: Use for_each_of_imap_item iterator"
  irqchip/mmp: Make icu_irq_chip variable static const
  irqchip/gic-v3-its: Limit number of per-device MSIs to the range the ITS supports
  irqchip/sifive-plic: Fix frozen interrupt due to affinity setting
2026-03-01 10:58:16 -08:00
Linus Torvalds
eb71ab2bf7 bpf-fixes
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEE+soXsSLHKoYyzcli6rmadz2vbToFAmmjmDIACgkQ6rmadz2v
 bTq3gg//QQLOT/FxP2/dDurliDTXvQRr1tUxmIw6s3P6hnz9j/LLEVKpLRVkqd8t
 XEwbubPd1TXDRsJ4f26Ew01YUtf9xi6ZQoMe/BL1okxi0ZwQGGRVMkiKOQgRT+rj
 qYSN5JMfPzA2AuM6FjBF/hhw24yVRdgKRYBam6D7XLfFf3s8TOhHHjJ925PqEo0t
 uJOy4ddDYB9BcGmfoeyiFgUtpPqcYrKIUCLBdwFvT2fnPJvrFFoCF3t7NS9UJu/O
 wd6ZPuGWSOl9A7vSheldP6cJUDX8L/5WEGO4/LjN7plkySF0HNv8uq/b1T3kKqoY
 Y3unXerLGJUAA9D5wpYAekx9YmvRTPQ/o39oTbquEB4SSJVU/SPUpvFw7m2Moq10
 51yuyXLcPlI3xtk0Bd8c/CESSmkRenjWzsuZQhDGhsR0I9mIaALrhf9LaatHtXI5
 f5ct73e+beK7Fc0Ze+b0JxDeFvzA3CKfAF0/fvGt0r9VZjBaMD+a3NnscBlyKztW
 UCXazcfndMhNfUUWanktbT5YhYPmY7hzVQEOl7HAMGn4yG6XbXXmzzY6BqEXIucM
 etueW2msZJHGBHQGe2RK3lxtmiB7/FglJHd86xebkIU2gCzqt8fGUha8AIuJ4rLS
 7wxC33DycCofRGWdseVu7PsTasdhSGsHKbXz2fOFOFESOczYRw8=
 =fj3P
 -----END PGP SIGNATURE-----

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

 - Fix alignment of arm64 JIT buffer to prevent atomic tearing (Fuad
   Tabba)

 - Fix invariant violation for single value tnums in the verifier
   (Harishankar Vishwanathan, Paul Chaignon)

 - Fix a bunch of issues found by ASAN in selftests/bpf (Ihor Solodrai)

 - Fix race in devmpa and cpumap on PREEMPT_RT (Jiayuan Chen)

 - Fix show_fdinfo of kprobe_multi when cookies are not present (Jiri
   Olsa)

 - Fix race in freeing special fields in BPF maps to prevent memory
   leaks (Kumar Kartikeya Dwivedi)

 - Fix OOB read in dmabuf_collector (T.J. Mercier)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (36 commits)
  selftests/bpf: Avoid simplification of crafted bounds test
  selftests/bpf: Test refinement of single-value tnum
  bpf: Improve bounds when tnum has a single possible value
  bpf: Introduce tnum_step to step through tnum's members
  bpf: Fix race in devmap on PREEMPT_RT
  bpf: Fix race in cpumap on PREEMPT_RT
  selftests/bpf: Add tests for special fields races
  bpf: Retire rcu_trace_implies_rcu_gp() from local storage
  bpf: Delay freeing fields in local storage
  bpf: Lose const-ness of map in map_check_btf()
  bpf: Register dtor for freeing special fields
  selftests/bpf: Fix OOB read in dmabuf_collector
  selftests/bpf: Fix a memory leak in xdp_flowtable test
  bpf: Fix stack-out-of-bounds write in devmap
  bpf: Fix kprobe_multi cookies access in show_fdinfo callback
  bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
  selftests/bpf: Don't override SIGSEGV handler with ASAN
  selftests/bpf: Check BPFTOOL env var in detect_bpftool_path()
  selftests/bpf: Fix out-of-bounds array access bugs reported by ASAN
  selftests/bpf: Fix array bounds warning in jit_disasm_helpers
  ...
2026-02-28 19:54:28 -08:00
Paolo Bonzini
407fd8b8d8 KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER
All architectures now use MMU notifier for KVM page table management.
Remove the Kconfig symbol and the code that is used when it is
disabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2026-02-28 15:31:35 +01:00
Harishankar Vishwanathan
76e954155b bpf: Introduce tnum_step to step through tnum's members
This commit introduces tnum_step(), a function that, when given t, and a
number z returns the smallest member of t larger than z. The number z
must be greater or equal to the smallest member of t and less than the
largest member of t.

The first step is to compute j, a number that keeps all of t's known
bits, and matches all unknown bits to z's bits. Since j is a member of
the t, it is already a candidate for result. However, we want our result
to be (minimally) greater than z.

There are only two possible cases:

(1) Case j <= z. In this case, we want to increase the value of j and
make it > z.
(2) Case j > z. In this case, we want to decrease the value of j while
keeping it > z.

(Case 1) j <= z

t = xx11x0x0
z = 10111101 (189)
j = 10111000 (184)
         ^
         k

(Case 1.1) Let's first consider the case where j < z. We will address j
== z later.

Since z > j, there had to be a bit position that was 1 in z and a 0 in
j, beyond which all positions of higher significance are equal in j and
z. Further, this position could not have been unknown in a, because the
unknown positions of a match z. This position had to be a 1 in z and
known 0 in t.

Let k be position of the most significant 1-to-0 flip. In our example, k
= 3 (starting the count at 1 at the least significant bit).  Setting (to
1) the unknown bits of t in positions of significance smaller than
k will not produce a result > z. Hence, we must set/unset the unknown
bits at positions of significance higher than k. Specifically, we look
for the next larger combination of 1s and 0s to place in those
positions, relative to the combination that exists in z. We can achieve
this by concatenating bits at unknown positions of t into an integer,
adding 1, and writing the bits of that result back into the
corresponding bit positions previously extracted from z.

>From our example, considering only positions of significance greater
than k:

t =  xx..x
z =  10..1
    +    1
     -----
     11..0

This is the exact combination 1s and 0s we need at the unknown bits of t
in positions of significance greater than k. Further, our result must
only increase the value minimally above z. Hence, unknown bits in
positions of significance smaller than k should remain 0. We finally
have,

result = 11110000 (240)

(Case 1.2) Now consider the case when j = z, for example

t = 1x1x0xxx
z = 10110100 (180)
j = 10110100 (180)

Matching the unknown bits of the t to the bits of z yielded exactly z.
To produce a number greater than z, we must set/unset the unknown bits
in t, and *all* the unknown bits of t candidates for being set/unset. We
can do this similar to Case 1.1, by adding 1 to the bits extracted from
the masked bit positions of z. Essentially, this case is equivalent to
Case 1.1, with k = 0.

t =  1x1x0xxx
z =  .0.1.100
    +       1
    ---------
     .0.1.101

This is the exact combination of bits needed in the unknown positions of
t. After recalling the known positions of t, we get

result = 10110101 (181)

(Case 2) j > z

t = x00010x1
z = 10000010 (130)
j = 10001011 (139)
	^
	k

Since j > z, there had to be a bit position which was 0 in z, and a 1 in
j, beyond which all positions of higher significance are equal in j and
z. This position had to be a 0 in z and known 1 in t. Let k be the
position of the most significant 0-to-1 flip. In our example, k = 4.

Because of the 0-to-1 flip at position k, a member of t can become
greater than z if the bits in positions greater than k are themselves >=
to z. To make that member *minimally* greater than z, the bits in
positions greater than k must be exactly = z. Hence, we simply match all
of t's unknown bits in positions more significant than k to z's bits. In
positions less significant than k, we set all t's unknown bits to 0
to retain minimality.

In our example, in positions of greater significance than k (=4),
t=x000. These positions are matched with z (1000) to produce 1000. In
positions of lower significance than k, t=10x1. All unknown bits are set
to 0 to produce 1001. The final result is:

result = 10001001 (137)

This concludes the computation for a result > z that is a member of t.

The procedure for tnum_step() in this commit implements the idea
described above. As a proof of correctness, we verified the algorithm
against a logical specification of tnum_step. The specification asserts
the following about the inputs t, z and output res that:

1. res is a member of t, and
2. res is strictly greater than z, and
3. there does not exist another value res2 such that
	3a. res2 is also a member of t, and
	3b. res2 is greater than z
	3c. res2 is smaller than res

We checked the implementation against this logical specification using
an SMT solver. The verification formula in SMTLIB format is available
at [1]. The verification returned an "unsat": indicating that no input
assignment exists for which the implementation and the specification
produce different outputs.

In addition, we also automatically generated the logical encoding of the
C implementation using Agni [2] and verified it against the same
specification. This verification also returned an "unsat", confirming
that the implementation is equivalent to the specification. The formula
for this check is also available at [3].

Link: https://pastebin.com/raw/2eRWbiit [1]
Link: https://github.com/bpfverif/agni [2]
Link: https://pastebin.com/raw/EztVbBJ2 [3]
Co-developed-by: Srinivas Narayana <srinivas.narayana@rutgers.edu>
Signed-off-by: Srinivas Narayana <srinivas.narayana@rutgers.edu>
Co-developed-by: Santosh Nagarakatte <santosh.nagarakatte@rutgers.edu>
Signed-off-by: Santosh Nagarakatte <santosh.nagarakatte@rutgers.edu>
Signed-off-by: Harishankar Vishwanathan <harishankar.vishwanathan@gmail.com>
Link: https://lore.kernel.org/r/93fdf71910411c0f19e282ba6d03b4c65f9c5d73.1772225741.git.paul.chaignon@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-27 16:11:50 -08:00
Kumar Kartikeya Dwivedi
ae51772b1e bpf: Lose const-ness of map in map_check_btf()
BPF hash map may now use the map_check_btf() callback to decide whether
to set a dtor on its bpf_mem_alloc or not. Unlike C++ where members can
opt out of const-ness using mutable, we must lose the const qualifier on
the callback such that we can avoid the ugly cast. Make the change and
adjust all existing users, and lose the comment in hashtab.c.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260227224806.646888-3-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-27 15:39:00 -08:00
Kumar Kartikeya Dwivedi
1df97a7453 bpf: Register dtor for freeing special fields
There is a race window where BPF hash map elements can leak special
fields if the program with access to the map value recreates these
special fields between the check_and_free_fields done on the map value
and its eventual return to the memory allocator.

Several ways were explored prior to this patch, most notably [0] tried
to use a poison value to reject attempts to recreate special fields for
map values that have been logically deleted but still accessible to BPF
programs (either while sitting in the free list or when reused). While
this approach works well for task work, timers, wq, etc., it is harder
to apply the idea to kptrs, which have a similar race and failure mode.

Instead, we change bpf_mem_alloc to allow registering destructor for
allocated elements, such that when they are returned to the allocator,
any special fields created while they were accessible to programs in the
mean time will be freed. If these values get reused, we do not free the
fields again before handing the element back. The special fields thus
may remain initialized while the map value sits in a free list.

When bpf_mem_alloc is retired in the future, a similar concept can be
introduced to kmalloc_nolock-backed kmem_cache, paired with the existing
idea of a constructor.

Note that the destructor registration happens in map_check_btf, after
the BTF record is populated and (at that point) avaiable for inspection
and duplication. Duplication is necessary since the freeing of embedded
bpf_mem_alloc can be decoupled from actual map lifetime due to logic
introduced to reduce the cost of rcu_barrier()s in mem alloc free path in
9f2c6e96c6 ("bpf: Optimize rcu_barrier usage between hash map and bpf_mem_alloc.").

As such, once all callbacks are done, we must also free the duplicated
record. To remove dependency on the bpf_map itself, also stash the key
size of the map to obtain value from htab_elem long after the map is
gone.

  [0]: https://lore.kernel.org/bpf/20260216131341.1285427-1-mykyta.yatsenko5@gmail.com

Fixes: 14a324f6a6 ("bpf: Wire up freeing of referenced kptr")
Fixes: 1bfbc267ec ("bpf: Enable bpf_timer and bpf_wq in any context")
Reported-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: syzbot@syzkaller.appspotmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260227224806.646888-2-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-02-27 15:39:00 -08:00
Linus Torvalds
1c63df24be pci-v7.0-fixes-2
-----BEGIN PGP SIGNATURE-----
 
 iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAmmh9ZEUHGJoZWxnYWFz
 QGdvb2dsZS5jb20ACgkQWYigwDrT+vzh5RAAnapJg4KrABnDmsxyk2wFi0KTP1pA
 O0OUkdaAfpFsreGG9nUpRrrkG8QvMLB8sxoJ0PlFdL4kljp8gN56dTXhhSZuT9UA
 FZtoJgZWV+kjw8fk9vxnqc/yOzD8knXbF9AILTKRUDCUiEmWsVjcvEq5sDV7hpx/
 DRuLtbWH8cY5vKXl7DS1HpORal73X3yCMZ1kRofJ+8CYOWdNotJp3jDss9M61bIw
 inhDy2iOR6UuxAjfRujT2B/sDWzdZ9jTENahb5PB66lWxbSfHXfnItlhcXUu/ojK
 ap2oIf/ResUjbtlQZQ2BYtouNilwI9hB23PdyYX/rDcCsvoUeJrYhMIam3G1zfYC
 xDg7jI7JEctB7hndC/yDE6iN9BJaY+nWrK7dCkL1zstawagT3CLcWq/j3XvYuLSo
 t1Bp1tTuYW8WFoeSHkPuazpVgm+sM5hHP08TNY/ErZ3nIlEajsQH4/yW+8WTtaYv
 uUuW+W6ATMVe/K38qBpAqkbAjaQ5m0zFSEsTjQyhssU+Atpqd/pJtmC8FoWZZ4DL
 uR+o1QT94RFJFiB91m1tbH7n2ReYIl1VvW5z27d4WVCZE1PkBnQo3EU4uUvzGmHK
 1qLOGZiq4LEEG0E3KdeoZh6tqmjPsNk/ZJf/wcb02RkrvscpEymMvuvBLQk07U28
 nHTEYfryFYzIq1w=
 =8d7b
 -----END PGP SIGNATURE-----

Merge tag 'pci-v7.0-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull pci fixes from Bjorn Helgaas:

 - Update MAINTAINERS email address (Shawn Guo)

 - Refresh cached Endpoint driver MSI Message Address to fix a v7.0
   regression when kernel changes the address after firmware has
   configured it (Niklas Cassel)

 - Flush Endpoint MSI-X writes so they complete before the outbound ATU
   entry is unmapped (Niklas Cassel)

 - Correct the PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value, which broke VMM use
   of PCI capabilities (Bjorn Helgaas)

* tag 'pci-v7.0-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI: Correct PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value
  PCI: dwc: ep: Flush MSI-X write before unmapping its ATU entry
  PCI: dwc: ep: Refresh MSI Message Address cache on change
  MAINTAINERS: Update Shawn Guo's address for HiSilicon PCIe controller driver
2026-02-27 13:32:52 -08:00
Linus Torvalds
962336b9ff MMC core:
- Avoid bitfield RMW for claim/retune flags
 
 MMC host:
  - dw_mmc-rockchip: Fix runtime PM support for internal phase support
  - mmci: Fix device_node reference leak in of_get_dml_pipe_index()
  - sdhci-brcmstb: Use correct register offset for V1 pin_sel restore
 -----BEGIN PGP SIGNATURE-----
 
 iQJLBAABCgA1FiEEugLDXPmKSktSkQsV/iaEJXNYjCkFAmmhyS4XHHVsZi5oYW5z
 c29uQGxpbmFyby5vcmcACgkQ/iaEJXNYjCnhaA/+IzAHwVL1DGwZNbO/5cO84rkL
 vx7Hnzt0CMbwkBlEdFFXUDt1/ESSWNQk2e7ydNCElwBIz0PdBp5hlMIyumksx1D0
 sQibqz4kNywtAAVtFcgemKb8BVdf7bdwVD+5sGnFhHmX8+GyTjlTd9Qj/Yt7bgcA
 ywWfl+w45rR0bypGsfMJVQ3l2pslwiXTyo0K4TUJiZkCtpwu9hzSfFShGM2ipYFX
 HiSTGV240MvxYteuqgVJIFdQmEje1NczGjRS6s6BIvt7zwKcfJgJACpue6ZJu3Ra
 vy9NFnNXCQ2C1LFtr0MjjrdWBowed6/HJJoxCgfcmdxbnqYqZWMfDGrOtH6xP8HQ
 xGHJJF5BA3EvvyfBg5hgUKVvQ80yRnIYUJ52Tzwcm0U9gcHe1tu1rxRYwNPUpLBS
 L/smXIvt0j/WVPEjKO+I1TXB1XMqJFSh88vAut7UXbCtJZN9YBP/aRqXJSVc5gs/
 LKNWrNr1qymusvPagnlMnYGOdJKQbBNKYeN7oyEwyN/oW/JF6JGVuWctvJQuigVz
 xDw2g7cnI/CMh+gAQumd1H23Rnwy+kL16Ld9z27ih4PB54Vq7VlTxbpJCdREDxU6
 y8c3C09AKOjMfOPXwqnJ/2HH+y4IpYW9WykuaKJFRKekx87irKuc8BOC5cGwXL8H
 WXZbxqLrQM9GkPXiu+w=
 =zG3/
 -----END PGP SIGNATURE-----

Merge tag 'mmc-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Avoid bitfield RMW for claim/retune flags

  MMC host:
   - dw_mmc-rockchip: Fix runtime PM support for internal phase support
   - mmci: Fix device_node reference leak in of_get_dml_pipe_index()
   - sdhci-brcmstb: Use correct register offset for V1 pin_sel restore"

* tag 'mmc-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: Avoid bitfield RMW for claim/retune flags
  mmc: sdhci-brcmstb: use correct register offset for V1 pin_sel restore
  mmc: dw_mmc-rockchip: Fix runtime PM support for internal phase support
  mmc: mmci: Fix device_node reference leak in of_get_dml_pipe_index()
2026-02-27 10:49:54 -08:00
Linus Torvalds
3feb464fb7 slab fixes for 7.0-rc1
-----BEGIN PGP SIGNATURE-----
 
 iQFPBAABCAA5FiEEe7vIQRWZI0iWSE3xu+CwddJFiJoFAmmhvA4bFIAAAAAABAAO
 bWFudTIsMi41KzEuMTEsMiwyAAoJELvgsHXSRYiaqPEIAJAN0BlnFoaWew6YSiEO
 RjVx1G14Xdp4H9Vc93cg3pXXTvBlAMgNSxEhyiXXCwFTGjnsUqowDqDU6+cJCr7k
 KqVLPh1gHR4aIsXcgufOqu9W9hv/vQrd2d9/8qSD+k2jwcOEIk/oFyjRPrzxCrxg
 sH4hWy+zfJW1mllMXbMRj3RVRIrvITmnLK0J0ByzuTXjrswyHhsY+6Bl2G5Q7F4V
 MuHLZcUAcav/gi4r0d/RoK3m37lC7mGUBT7xsGvt/vRCTCgQvwHbKu47Wq7c+ozd
 dP2Dz3qNIR/q2BdDx5ftC8bacR+QE2E3EcYhraOVjLcEsMUO3e7n83umgOixyIT+
 fNU=
 =FjaS
 -----END PGP SIGNATURE-----

Merge tag 'slab-for-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fixes from Vlastimil Babka:

 - Fix for spurious page allocation warnings on sheaf refill (Harry Yoo)

 - Fix for CONFIG_MEM_ALLOC_PROFILING_DEBUG warnings (Suren
   Baghdasaryan)

 - Fix for kernel-doc warning on ksize() (Sanjay Chitroda)

 - Fix to avoid setting slab->stride later than on slab allocation.
   Doesn't yet fix the reports from powerpc; debugging is making
   progress (Harry Yoo)

* tag 'slab-for-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  mm/slab: initialize slab->stride early to avoid memory ordering issues
  mm/slub: drop duplicate kernel-doc for ksize()
  mm/slab: mark alloc tags empty for sheaves allocated with __GFP_NO_OBJ_EXT
  mm/slab: pass __GFP_NOWARN to refill_sheaf() if fallback is available
2026-02-27 09:54:02 -08:00
Linus Torvalds
466d6175e3 drm fixes for 7.0-rc2
i915/display:
 - Fix Panel Replay stuck with X during mode transitions on Panther Lake
 
 xe:
 - W/a fix for multi-cast registers
 - Fix xe_sync initialization issues
 
 amdgpu:
 - UserQ fixes
 - DC fix
 - RAS fixes
 - VCN 5 fix
 - Slot reset fix
 - Remove MES workaround that's no longer needed
 
 amdxdna:
 - deadlock fix
 - NULL ptr deref fix
 - suspend failure fix
 - OOB access fix
 - buffer overflow fix
 - input sanitiation fix
 - firmware loading fix
 
 dw-dp:
 - An error handling fix
 
 ethosu:
 - A binary shift overflow fix
 
 imx:
 - An error handling fix
 
 logicvc:
 - A dt node reference leak fix
 
 nouveau:
 - A WARN_ON removal
 
 samsung-dsim:
 - A memory leak fix
 
 tiny:
 - sharp-memory: NULL pointer deref fix
 
 vmwgfx:
 - A reference count and error handling fix
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEEKbZHaGwW9KfbeusDHTzWXnEhr4FAmmhNZoACgkQDHTzWXnE
 hr4F0hAAoc+Lbq0tePa+I6Pf6Yjq/ufzqBSWvEjN+5mXjBuY2oUytpGrGzqASczr
 03Q6zGVFzdXA5mJtRPxlhUVUn/SVbTGauTHs5wzZejiylw2+xngGAt81kIFab4km
 y2BLkOOCn96JhE/VqjrisydfwwXQD4TAbzpF12EZ4t+zyqmuEnuJ9TDTLcFDrOxn
 WfOY5neXtmntHavZ14IqghQNPUcj0x8KLC65BldNUfLdhnk5JwdsqdLwrID80fYW
 OBPGW1g1/4Ee4AKv+aKUB+1dm3fQGWh1K9C4Xh6g+OWIhn30Oo7BnTbu6N15GPN6
 rle+t5jnxkxhNcxEQNA8l1WJgexBJz4wKixwf7XwrF21OMom+QhS9hboCwhunQt6
 BTtw5HJubFXHRgEnTXiMeTLgW80TppDUjt5nEsy5CzP+5G8gqi1Xh3qMF0SjJHki
 Spxvt7Fh0qxHctzecOJi5aqVq2PiTeKNihI7OfZ5604OLlhbZE2WL556upJRLMz+
 u5CrdB3gCJ5aSNQyi3bP0Rg25jE8/mobdWJSgn3n2Z8v/XKdFX+s7cxyZiyTBEYu
 aQuQAfVOh5l1VT1ydQ0tki/sHyZ2cWDTukKHR7li8rJPC0kkZc28IE8T2YML8+A8
 1zgKhVHnTKoa/ngmTvmhBAfKaoLr+wgf646JGTllDw1z8hk5+3k=
 =/AzA
 -----END PGP SIGNATURE-----

Merge tag 'drm-fixes-2026-02-27' of https://gitlab.freedesktop.org/drm/kernel

Pull drm fixes from Dave Airlie:
 "Regular fixes pull, amdxdna and amdgpu are the main ones, with a
  couple of intel fixes, then a scattering of fixes across drivers,
  nothing too major.

  i915/display:
   - Fix Panel Replay stuck with X during mode transitions on Panther
     Lake

  xe:
   - W/a fix for multi-cast registers
   - Fix xe_sync initialization issues

  amdgpu:
   - UserQ fixes
   - DC fix
   - RAS fixes
   - VCN 5 fix
   - Slot reset fix
   - Remove MES workaround that's no longer needed

  amdxdna:
   - deadlock fix
   - NULL ptr deref fix
   - suspend failure fix
   - OOB access fix
   - buffer overflow fix
   - input sanitiation fix
   - firmware loading fix

  dw-dp:
   - An error handling fix

  ethosu:
   - A binary shift overflow fix

  imx:
   - An error handling fix

  logicvc:
   - A dt node reference leak fix

  nouveau:
   - A WARN_ON removal

  samsung-dsim:
   - A memory leak fix

  tiny:
   - sharp-memory: NULL pointer deref fix

  vmwgfx:
   - A reference count and error handling fix"

* tag 'drm-fixes-2026-02-27' of https://gitlab.freedesktop.org/drm/kernel: (39 commits)
  drm/amd: Disable MES LR compute W/A
  drm/amdgpu: Fix error handling in slot reset
  drm/amdgpu/vcn5: Add SMU dpm interface type
  drm/amdgpu: Fix locking bugs in error paths
  drm/amdgpu: Unlock a mutex before destroying it
  drm/amd/display: Use GFP_ATOMIC in dc_create_stream_for_sink
  drm/amdgpu: add upper bound check on user inputs in wait ioctl
  drm/amdgpu: add upper bound check on user inputs in signal ioctl
  drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings
  drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl
  accel/amdxdna: Use a different name for latest firmware
  drm/client: Do not destroy NULL modes
  drm/gpusvm: Fix drm_gpusvm_pages_valid_unlocked() kernel-doc
  drm/xe/sync: Fix user fence leak on alloc failure
  drm/xe/sync: Cleanup partially initialized sync on parse failure
  drm/xe/wa: Steer RMW of MCR registers while building default LRC
  accel/amdxdna: Validate command buffer payload count
  accel/amdxdna: Prevent ubuf size overflow
  accel/amdxdna: Fix out-of-bounds memset in command slot handling
  accel/amdxdna: Fix command hang on suspended hardware context
  ...
2026-02-27 08:56:07 -08:00
Bjorn Helgaas
39195990e4 PCI: Correct PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value
fb82437fdd ("PCI: Change capability register offsets to hex") incorrectly
converted the PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value from decimal 52 to hex
0x32:

  -#define PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 52      /* v2 endpoints with link end here */
  +#define PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 0x32    /* end of v2 EPs w/ link */

This broke PCI capabilities in a VMM because subsequent ones weren't
DWORD-aligned.

Change PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 to the correct value of 0x34.

fb82437fdd was from Baruch Siach <baruch@tkos.co.il>, but this was not
Baruch's fault; it's a mistake I made when applying the patch.

Fixes: fb82437fdd ("PCI: Change capability register offsets to hex")
Reported-by: David Woodhouse <dwmw2@infradead.org>
Closes: https://lore.kernel.org/all/3ae392a0158e9d9ab09a1d42150429dd8ca42791.camel@infradead.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
2026-02-27 10:24:25 -06:00
Linus Torvalds
69062f234a 12 hotfixes. 7 are cc:stable. 8 are for MM.
All are singletons - please see the changelogs for details.
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCaaDF4AAKCRDdBJ7gKXxA
 jhv5AQDv+B9rPkFJ0dlSS/hXqsDGqy3dGj/grJM0dw7LhkPHzgEAi/bV6D1jx0k3
 k0hcP3JUxE54+a7liLadPDLIObOMLgo=
 =R1ap
 -----END PGP SIGNATURE-----

Merge tag 'mm-hotfixes-stable-2026-02-26-14-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "12 hotfixes.  7 are cc:stable.  8 are for MM.

  All are singletons - please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-02-26-14-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  MAINTAINERS: update Yosry Ahmed's email address
  mailmap: add entry for Daniele Alessandrelli
  mm: fix NULL NODE_DATA dereference for memoryless nodes on boot
  mm/tracing: rss_stat: ensure curr is false from kthread context
  mm/kfence: fix KASAN hardware tag faults during late enablement
  mm/damon/core: disallow non-power of two min_region_sz
  Squashfs: check metadata block offset is within range
  MAINTAINERS, mailmap: update e-mail address for Vlastimil Babka
  liveupdate: luo_file: remember retrieve() status
  mm: thp: deny THP for files on anonymous inodes
  mm: change vma_alloc_folio_noprof() macro to inline function
  mm/kfence: disable KFENCE upon KASAN HW tags enablement
2026-02-26 15:27:41 -08:00
Linus Torvalds
db5781c407 Power management updates for 7.0-rc2
- Fix two issues in the intel_pstate driver causing it to crash when
    its sysfs interface is used on a system with some offline CPUs (David
    Arcari, Srinivas Pandruvada)
 
  - Update the last user of the pm_runtime_put() return value to discard
    it and turn pm_runtime_put() into a void function (Rafael Wysocki)
 
  - Update Daniel Lezcano's contact information in MAINTAINERS and
    .mailmap (Daniel Lezcano)
 -----BEGIN PGP SIGNATURE-----
 
 iQFGBAABCAAwFiEEcM8Aw/RY0dgsiRUR7l+9nS/U47UFAmmgsbkSHHJqd0Byand5
 c29ja2kubmV0AAoJEO5fvZ0v1OO19AsH/3gG3rKHACuNmqGC487gFux+zvT9rFJf
 A6BrhKUSAUXiKa32d9qfbGOC2sGvfNsIxUFo/lzxPWm5AreIGSMvAm6MlfS0J05v
 mhoPslsrY516p1l+kRsZkCq3vk58ZpEiwGrSEaHU7zGe0yldWPSeQ/hab7Ff/uZv
 /rNDE70eabvl572ch079JfqzXRZ4nar/mbTNNywwqq6m3TFkNTTHAfJ2KXY4iKv/
 VKeIrxecksOqslmMPHb1vnRaKdAx2WssRx3bVAvbCrObAoSs1hFiu7RK2DQOsUSy
 f3h4csixhItNI+ERDQY2AJPXnEyr+pFtkcv0WCG5CBOBx4CrubptwTs=
 =iFsD
 -----END PGP SIGNATURE-----

Merge tag 'pm-7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix two intel_pstate driver issues causing it to crash on sysfs
  attribute accesses when some CPUs in the system are offline, finalize
  changes related to turning pm_runtime_put() into a void function, and
  update Daniel Lezcano's contact information:

   - Fix two issues in the intel_pstate driver causing it to crash when
     its sysfs interface is used on a system with some offline CPUs
     (David Arcari, Srinivas Pandruvada)

   - Update the last user of the pm_runtime_put() return value to
     discard it and turn pm_runtime_put() into a void function (Rafael
     Wysocki)

   - Update Daniel Lezcano's contact information in MAINTAINERS and
     .mailmap (Daniel Lezcano)"

* tag 'pm-7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  MAINTAINERS: Update contact with the kernel.org address
  cpufreq: intel_pstate: Fix crash during turbo disable
  cpufreq: intel_pstate: Fix NULL pointer dereference in update_cpu_qos_request()
  PM: runtime: Change pm_runtime_put() return type to void
  pmdomain: imx: gpcv2: Discard pm_runtime_put() return value
2026-02-26 14:40:21 -08:00
Linus Torvalds
3f4a08e644 kmalloc_obj fixes for v7.0-rc2
- Fix pointer-to-array allocation types for ubd and kcsan
 
 - Force size overflow helpers to __always_inline
 
 - Bump __builtin_counted_by_ref to Clang 22.1 from 22.0 (Nathan Chancellor)
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRSPkdeREjth1dHnSE2KwveOeQkuwUCaaCJawAKCRA2KwveOeQk
 u2LdAQD/wZYe1YCCrUR+jM6EvAoI2CzUEQUQMyzLtjIyeSR6VAD8CSdZu0htnwwy
 Ca76IzSF8Aj0D7Hytxkk8HDAD4WuxA0=
 =QucI
 -----END PGP SIGNATURE-----

Merge tag 'kmalloc_obj-v7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull kmalloc_obj fixes from Kees Cook:

 - Fix pointer-to-array allocation types for ubd and kcsan

 - Force size overflow helpers to __always_inline

 - Bump __builtin_counted_by_ref to Clang 22.1 from 22.0 (Nathan Chancellor)

* tag 'kmalloc_obj-v7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kcsan: test: Adjust "expect" allocation type for kmalloc_obj
  overflow: Make sure size helpers are always inlined
  init/Kconfig: Adjust fixed clang version for __builtin_counted_by_ref
  ubd: Use pointer-to-pointers for io_thread_req arrays
2026-02-26 10:05:15 -08:00
Linus Torvalds
e3c81bae4f RDMA v7.0 first rc
Seems bigger than usual, a number of things were posted near/during the
 merg window:
 
 - Fix some compilation regressions related to the new DMABUF code
 
 - Close a race with ib_register_device() vs netdev events that causes
   GID table corruption
 
 - Compilation warnings with some compilers in bng_re
 
 - Correct error unwind in bng_re and the umem pinned dmabuf
 
 - Avoid NULL pointer crash in ionic during query_port()
 
 - Check the size for uAPI validation checks in EFA
 
 - Several system call stack leaks in drivers found with AI
 
 - Fix the new restricted_node_type so it works with wildcard listens too
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCaaBmHAAKCRCFwuHvBreF
 YZaiAP42BqmvK9JndjY37krvHZ6NG7kYyx2DeuFQKKTLXhOUkQD7BUnnInKMRDNX
 fYkc6vibEQ/C0p50cme1m2aRHba3Vg0=
 =4LA8
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Seems bigger than usual, a number of things were posted near/during
  the merg window:

   - Fix some compilation regressions related to the new DMABUF code

   - Close a race with ib_register_device() vs netdev events that causes
     GID table corruption

   - Compilation warnings with some compilers in bng_re

   - Correct error unwind in bng_re and the umem pinned dmabuf

   - Avoid NULL pointer crash in ionic during query_port()

   - Check the size for uAPI validation checks in EFA

   - Several system call stack leaks in drivers found with AI

   - Fix the new restricted_node_type so it works with wildcard listens
     too"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/uverbs: Import DMA-BUF module in uverbs_std_types_dmabuf file
  RDMA/umem: Fix double dma_buf_unpin in failure path
  RDMA/core: Check id_priv->restricted_node_type in cma_listen_on_dev()
  RDMA/ionic: Fix kernel stack leak in ionic_create_cq()
  RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()
  IB/mthca: Add missed mthca_unmap_user_db() for mthca_create_srq()
  RDMA/efa: Fix typo in efa_alloc_mr()
  RDMA/ionic: Fix potential NULL pointer dereference in ionic_query_port
  RDMA/bng_re: Unwind bng_re_dev_init properly
  RDMA/bng_re: Remove unnessary validity checks
  RDMA/core: Fix stale RoCE GIDs during netdev events at registration
  RDMA/uverbs: select CONFIG_DMA_SHARED_BUFFER
2026-02-26 08:37:18 -08:00
Sanjay Chitroda
2b351ea428 mm/slub: drop duplicate kernel-doc for ksize()
The implementation of ksize() was updated with kernel-doc by commit
fab0694646 ("mm/slab: move [__]ksize and slab_ksize() to mm/slub.c")
However, the public header still contains a kernel-doc comment
attached to the ksize() prototype.

Having documentation both in the header and next to the implementation
causes Sphinx to treat the function as being documented twice,
resulting in the warning:

  WARNING: Duplicate C declaration, also defined at core-api/mm-api:521
  Declaration is '.. c:function:: size_t ksize(const void *objp)'

Kernel-doc guidelines recommend keeping the documentation with the
function implementation. Therefore remove the redundant kernel-doc
block from include/linux/slab.h so that the implementation in slub.c
remains the canonical source for documentation.

No functional change.

Fixes: fab0694646 ("mm/slab: move [__]ksize and slab_ksize() to mm/slub.c")
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Link: https://patch.msgid.link/20260226054712.3610744-1-sanjayembedded@gmail.com
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
2026-02-26 17:30:32 +01:00
Suren Baghdasaryan
f3ec502b67 mm/slab: mark alloc tags empty for sheaves allocated with __GFP_NO_OBJ_EXT
alloc_empty_sheaf() allocates sheaves from SLAB_KMALLOC caches using
__GFP_NO_OBJ_EXT to avoid recursion, however it does not mark their
allocation tags empty before freeing, which results in a warning when
CONFIG_MEM_ALLOC_PROFILING_DEBUG is set. Fix this by marking allocation
tags for such sheaves as empty.

The problem was technically introduced in commit 4c0a17e283 but only
becomes possible to hit with commit 913ffd3a1b.

Fixes: 4c0a17e283 ("slab: prevent recursive kmalloc() in alloc_empty_sheaf()")
Fixes: 913ffd3a1b ("slab: handle kmalloc sheaves bootstrap")
Reported-by: David Wang <00107082@163.com>
Closes: https://lore.kernel.org/all/20260223155128.3849-1-00107082@163.com/
Analyzed-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Tested-by: Harry Yoo <harry.yoo@oracle.com>
Tested-by: David Wang <00107082@163.com>
Link: https://patch.msgid.link/20260225163407.2218712-1-surenb@google.com
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
2026-02-26 17:30:32 +01:00
Linus Torvalds
b9c8fc2cae Including fixes from IPsec, Bluetooth and netfilter
Current release - regressions:
 
   - wifi: fix dev_alloc_name() return value check
 
   - rds: fix recursive lock in rds_tcp_conn_slots_available
 
 Current release - new code bugs:
 
   - vsock: lock down child_ns_mode as write-once
 
 Previous releases - regressions:
 
   - core:
     - do not pass flow_id to set_rps_cpu()
     - consume xmit errors of GSO frames
 
   - netconsole: avoid OOB reads, msg is not nul-terminated
 
   - netfilter: h323: fix OOB read in decode_choice()
 
   - tcp: re-enable acceptance of FIN packets when RWIN is 0
 
   - udplite: fix null-ptr-deref in __udp_enqueue_schedule_skb().
 
   - wifi: brcmfmac: fix potential kernel oops when probe fails
 
   - phy: register phy led_triggers during probe to avoid AB-BA deadlock
 
   - eth: bnxt_en: fix deleting of Ntuple filters
 
   - eth: wan: farsync: fix use-after-free bugs caused by unfinished tasklets
 
   - eth: xscale: check for PTP support properly
 
 Previous releases - always broken:
 
   - tcp: fix potential race in tcp_v6_syn_recv_sock()
 
   - kcm: fix zero-frag skb in frag_list on partial sendmsg error
 
   - xfrm:
     - fix race condition in espintcp_close()
     - always flush state and policy upon NETDEV_UNREGISTER event
 
   - bluetooth:
     - purge error queues in socket destructors
     - fix response to L2CAP_ECRED_CONN_REQ
 
   - eth: mlx5:
     - fix circular locking dependency in dump
     - fix "scheduling while atomic" in IPsec MAC address query
 
   - eth: gve: fix incorrect buffer cleanup for QPL
 
   - eth: team: avoid NETDEV_CHANGEMTU event when unregistering slave
 
   - eth: usb: validate USB endpoints
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCgAwFiEEg1AjqC77wbdLX2LbKSR5jcyPE6QFAmmgYU4SHHBhYmVuaUBy
 ZWRoYXQuY29tAAoJECkkeY3MjxOkLBgQAINazHstJ0DoDkvmwXapRSN0Ffauyd46
 oX6nfeWOT3BzZbAhZHtGgCSs4aULifJWMevtT7pq7a7PgZwMwfa47BugR1G/u5UE
 hCqalNjRTB/U2KmFk6eViKSacD4FvUIAyAMOotn1aEdRRAkBIJnIW/o/ZR9ZUkm0
 5+UigO64aq57+FOc5EQdGjYDcTVdzW12iOZ8ZqwtSATdNd9aC+gn3voRomTEo+Fm
 kQinkFEPAy/YyHGmfpC/z87/RTgkYLpagmsT4ZvBJeNPrIRvFEibSpPNhuzTzg81
 /BW5M8sJmm3XFiTiRp6Blv+0n6HIpKjAZMHn5c9hzX9cxPZQ24EjkXEex9ClaxLd
 OMef79rr1HBwqBTpIlK7xfLKCdT5Iex88s8HxXRB/Psqk9pVP469cSoK6cpyiGiP
 I+4WT0wn9ukTiu/yV2L2byVr1sanlu54P+UBYJpDwqq3lZ1ngWtkJ+SY369jhwAS
 FYIBmUSKhmWz3FEULaGpgPy4m9Fl/fzN8IFh2Buoc/Puq61HH7MAMjRty2ZSFTqj
 gbHrRhlkCRqubytgjsnCDPLoJF4ZYcXtpo/8ogG3641H1I+dN+DyGGVZ/ioswkks
 My1ds0rKqA3BHCmn+pN/qqkuopDCOB95dqOpgDqHG7GePrpa/FJ1guhxexsCd+nL
 Run2RcgDmd+d
 =HBOu
 -----END PGP SIGNATURE-----

Merge tag 'net-7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from IPsec, Bluetooth and netfilter

  Current release - regressions:

   - wifi: fix dev_alloc_name() return value check

   - rds: fix recursive lock in rds_tcp_conn_slots_available

  Current release - new code bugs:

   - vsock: lock down child_ns_mode as write-once

  Previous releases - regressions:

   - core:
      - do not pass flow_id to set_rps_cpu()
      - consume xmit errors of GSO frames

   - netconsole: avoid OOB reads, msg is not nul-terminated

   - netfilter: h323: fix OOB read in decode_choice()

   - tcp: re-enable acceptance of FIN packets when RWIN is 0

   - udplite: fix null-ptr-deref in __udp_enqueue_schedule_skb().

   - wifi: brcmfmac: fix potential kernel oops when probe fails

   - phy: register phy led_triggers during probe to avoid AB-BA deadlock

   - eth:
      - bnxt_en: fix deleting of Ntuple filters
      - wan: farsync: fix use-after-free bugs caused by unfinished tasklets
      - xscale: check for PTP support properly

  Previous releases - always broken:

   - tcp: fix potential race in tcp_v6_syn_recv_sock()

   - kcm: fix zero-frag skb in frag_list on partial sendmsg error

   - xfrm:
      - fix race condition in espintcp_close()
      - always flush state and policy upon NETDEV_UNREGISTER event

   - bluetooth:
      - purge error queues in socket destructors
      - fix response to L2CAP_ECRED_CONN_REQ

   - eth:
      - mlx5:
         - fix circular locking dependency in dump
         - fix "scheduling while atomic" in IPsec MAC address query
      - gve: fix incorrect buffer cleanup for QPL
      - team: avoid NETDEV_CHANGEMTU event when unregistering slave
      - usb: validate USB endpoints"

* tag 'net-7.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (72 commits)
  netfilter: nf_conntrack_h323: fix OOB read in decode_choice()
  dpaa2-switch: validate num_ifs to prevent out-of-bounds write
  net: consume xmit errors of GSO frames
  vsock: document write-once behavior of the child_ns_mode sysctl
  vsock: lock down child_ns_mode as write-once
  selftests/vsock: change tests to respect write-once child ns mode
  net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query
  net/mlx5: Fix missing devlink lock in SRIOV enable error path
  net/mlx5: E-switch, Clear legacy flag when moving to switchdev
  net/mlx5: LAG, disable MPESW in lag_disable_change()
  net/mlx5: DR, Fix circular locking dependency in dump
  selftests: team: Add a reference count leak test
  team: avoid NETDEV_CHANGEMTU event when unregistering slave
  net: mana: Fix double destroy_workqueue on service rescan PCI path
  MAINTAINERS: Update maintainer entry for QUALCOMM ETHQOS ETHERNET DRIVER
  dpll: zl3073x: Remove redundant cleanup in devm_dpll_init()
  selftests/net: packetdrill: Verify acceptance of FIN packets when RWIN is 0
  tcp: re-enable acceptance of FIN packets when RWIN is 0
  vsock: Use container_of() to get net namespace in sysctl handlers
  net: usb: kaweth: validate USB endpoints
  ...
2026-02-26 08:00:13 -08:00
Bobby Eshleman
102eab95f0 vsock: lock down child_ns_mode as write-once
Two administrator processes may race when setting child_ns_mode as one
process sets child_ns_mode to "local" and then creates a namespace, but
another process changes child_ns_mode to "global" between the write and
the namespace creation. The first process ends up with a namespace in
"global" mode instead of "local". While this can be detected after the
fact by reading ns_mode and retrying, it is fragile and error-prone.

Make child_ns_mode write-once so that a namespace manager can set it
once and be sure it won't change. Writing a different value after the
first write returns -EBUSY. This applies to all namespaces, including
init_net, where an init process can write "local" to lock all future
namespaces into local mode.

Fixes: eafb64f40c ("vsock: add netns to vsock core")
Suggested-by: Daan De Meyer <daan.j.demeyer@gmail.com>
Suggested-by: Stefano Garzarella <sgarzare@redhat.com>
Co-developed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20260223-vsock-ns-write-once-v3-2-c0cde6959923@meta.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-02-26 11:10:03 +01:00
Linus Torvalds
0e335a7745 vfs-7.0-rc2.fixes
Please consider pulling these changes from the signed vfs-7.0-rc2.fixes tag.
 
 Thanks!
 Christian
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaZ7xWAAKCRCRxhvAZXjc
 onpeAP4qOrTURIAX9M/NGCHywvjI91ZJt20J6vm0X6KbVV/ebQD/eoJ21xzPhG9M
 gN7oRcZ9SW3e/AdtdnlqB0PEP+cyGwM=
 =9Ji+
 -----END PGP SIGNATURE-----

Merge tag 'vfs-7.0-rc2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:

 - Fix an uninitialized variable in file_getattr().

   The flags_valid field wasn't initialized before calling
   vfs_fileattr_get(), triggering KMSAN uninit-value reports in fuse

 - Fix writeback wakeup and logging timeouts when DETECT_HUNG_TASK is
   not enabled.

   sysctl_hung_task_timeout_secs is 0 in that case causing spurious
   "waiting for writeback completion for more than 1 seconds" warnings

 - Fix a null-ptr-deref in do_statmount() when the mount is internal

 - Add missing kernel-doc description for the @private parameter in
   iomap_readahead()

 - Fix mount namespace creation to hold namespace_sem across the mount
   copy in create_new_namespace().

   The previous drop-and-reacquire pattern was fragile and failed to
   clean up mount propagation links if the real rootfs was a shared or
   dependent mount

 - Fix /proc mount iteration where m->index wasn't updated when
   m->show() overflows, causing a restart to repeatedly show the same
   mount entry in a rapidly expanding mount table

 - Return EFSCORRUPTED instead of ENOSPC in minix_new_inode() when the
   inode number is out of range

 - Fix unshare(2) when CLONE_NEWNS is set and current->fs isn't shared.

   copy_mnt_ns() received the live fs_struct so if a subsequent
   namespace creation failed the rollback would leave pwd and root
   pointing to detached mounts. Always allocate a new fs_struct when
   CLONE_NEWNS is requested

 - fserror bug fixes:

    - Remove the unused fsnotify_sb_error() helper now that all callers
      have been converted to fserror_report_metadata

    - Fix a lockdep splat in fserror_report() where igrab() takes
      inode::i_lock which can be held in IRQ context.

      Replace igrab() with a direct i_count bump since filesystems
      should not report inodes that are about to be freed or not yet
      exposed

 - Handle error pointer in procfs for try_lookup_noperm()

 - Fix an integer overflow in ep_loop_check_proc() where recursive calls
   returning INT_MAX would overflow when +1 is added, breaking the
   recursion depth check

 - Fix a misleading break in pidfs

* tag 'vfs-7.0-rc2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  pidfs: avoid misleading break
  eventpoll: Fix integer overflow in ep_loop_check_proc()
  proc: Fix pointer error dereference
  fserror: fix lockdep complaint when igrabbing inode
  fsnotify: drop unused helper
  unshare: fix unshare_fs() handling
  minix: Correct errno in minix_new_inode
  namespace: fix proc mount iteration
  mount: hold namespace_sem across copy in create_new_namespace()
  iomap: Describe @private in iomap_readahead()
  statmount: Fix the null-ptr-deref in do_statmount()
  writeback: Fix wakeup and logging timeouts for !DETECT_HUNG_TASK
  fs: init flags_valid before calling vfs_fileattr_get
2026-02-25 10:34:23 -08:00
Stefan Metzmacher
93a4a9b732 RDMA/core: Check id_priv->restricted_node_type in cma_listen_on_dev()
When listening on wildcard addresses we have a global list for the application
layer rdma_cm_id and for any existing device or any device added in future we
try to listen on any wildcard listener.

When the listener has a restricted_node_type we should prevent listening on
devices with a different node type.

While there fix the documentation comment of rdma_restrict_node_type()
to include rdma_resolve_addr() instead of having rdma_bind_addr() twice.

Fixes: a760e80e90 ("RDMA/core: introduce rdma_restrict_node_type()")
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Steve French <smfrench@gmail.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: linux-rdma@vger.kernel.org
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Link: https://patch.msgid.link/20260224165951.3582093-2-metze@samba.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
2026-02-25 07:50:10 -05:00
Kees Cook
4b44cbb264 overflow: Make sure size helpers are always inlined
With kmalloc_obj() performing implicit size calculations, the embedded
size_mul() calls, while marked inline, were not always being inlined.
I noticed a couple places where allocations were making a call out for
things that would otherwise be compile-time calculated. Force the
compilers to always inline these calculations.

Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://patch.msgid.link/20260224232451.work.614-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-24 15:46:31 -08:00
Kalesh Singh
079c24d569 mm/tracing: rss_stat: ensure curr is false from kthread context
The rss_stat trace event allows userspace tools, like Perfetto [1], to
inspect per-process RSS metric changes over time.

The curr field was introduced to rss_stat in commit e4dcad204d
("rss_stat: add support to detect RSS updates of external mm").  Its
intent is to indicate whether the RSS update is for the mm_struct of the
current execution context; and is set to false when operating on a remote
mm_struct (e.g., via kswapd or a direct reclaimer).

However, an issue arises when a kernel thread temporarily adopts a user
process's mm_struct.  Kernel threads do not have their own mm_struct and
normally have current->mm set to NULL.  To operate on user memory, they
can "borrow" a memory context using kthread_use_mm(), which sets
current->mm to the user process's mm.

This can be observed, for example, in the USB Function Filesystem (FFS)
driver.  The ffs_user_copy_worker() handles AIO completions and uses
kthread_use_mm() to copy data to a user-space buffer.  If a page fault
occurs during this copy, the fault handler executes in the kthread's
context.

At this point, current is the kthread, but current->mm points to the user
process's mm.  Since the rss_stat event (from the page fault) is for that
same mm, the condition current->mm == mm becomes true, causing curr to be
incorrectly set to true when the trace event is emitted.

This is misleading because it suggests the mm belongs to the kthread,
confusing userspace tools that track per-process RSS changes and
corrupting their mm_id-to-process association.

Fix this by ensuring curr is always false when the trace event is emitted
from a kthread context by checking for the PF_KTHREAD flag.

Link: https://lkml.kernel.org/r/20260219233708.1971199-1-kaleshsingh@google.com
Link: https://perfetto.dev/ [1]
Fixes: e4dcad204d ("rss_stat: add support to detect RSS updates of external mm")
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Cc: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: <stable@vger.kernel.org>	[5.10+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-02-24 11:13:27 -08:00
Pratyush Yadav (Google)
f85b1c6af5 liveupdate: luo_file: remember retrieve() status
LUO keeps track of successful retrieve attempts on a LUO file.  It does so
to avoid multiple retrievals of the same file.  Multiple retrievals cause
problems because once the file is retrieved, the serialized data
structures are likely freed and the file is likely in a very different
state from what the code expects.

The retrieve boolean in struct luo_file keeps track of this, and is passed
to the finish callback so it knows what work was already done and what it
has left to do.

All this works well when retrieve succeeds.  When it fails,
luo_retrieve_file() returns the error immediately, without ever storing
anywhere that a retrieve was attempted or what its error code was.  This
results in an errored LIVEUPDATE_SESSION_RETRIEVE_FD ioctl to userspace,
but nothing prevents it from trying this again.

The retry is problematic for much of the same reasons listed above.  The
file is likely in a very different state than what the retrieve logic
normally expects, and it might even have freed some serialization data
structures.  Attempting to access them or free them again is going to
break things.

For example, if memfd managed to restore 8 of its 10 folios, but fails on
the 9th, a subsequent retrieve attempt will try to call
kho_restore_folio() on the first folio again, and that will fail with a
warning since it is an invalid operation.

Apart from the retry, finish() also breaks.  Since on failure the
retrieved bool in luo_file is never touched, the finish() call on session
close will tell the file handler that retrieve was never attempted, and it
will try to access or free the data structures that might not exist, much
in the same way as the retry attempt.

There is no sane way of attempting the retrieve again.  Remember the error
retrieve returned and directly return it on a retry.  Also pass this
status code to finish() so it can make the right decision on the work it
needs to do.

This is done by changing the bool to an integer.  A value of 0 means
retrieve was never attempted, a positive value means it succeeded, and a
negative value means it failed and the error code is the value.

Link: https://lkml.kernel.org/r/20260216132221.987987-1-pratyush@kernel.org
Fixes: 7c722a7f44 ("liveupdate: luo_file: implement file systems callbacks")
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-02-24 11:13:26 -08:00
Arnd Bergmann
eb9549346f mm: change vma_alloc_folio_noprof() macro to inline function
In a few rare configurations with extra warnings eanbled, the new
drm_pagemap_migrate_populate_ram_pfn() calls vma_alloc_folio_noprof() but
that does not use all the arguments, leading to a harmless warning:

drivers/gpu/drm/drm_pagemap.c: In function 'drm_pagemap_migrate_populate_ram_pfn':
drivers/gpu/drm/drm_pagemap.c:701:63: error: parameter 'addr' set but not used [-Werror=unused-but-set-parameter=]
  701 |                                                 unsigned long addr)
      |                                                 ~~~~~~~~~~~~~~^~~~

Replace the macro with an inline function so the compiler can see how the
argument would be used, but is still able to optimize out the assignments.

Link: https://lkml.kernel.org/r/20260216121751.2378374-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-02-24 11:13:26 -08:00
Paolo Abeni
1348659dc9 bluetooth pull request for net:
- purge error queues in socket destructors
  - hci_sync: Fix CIS host feature condition
  - L2CAP: Fix invalid response to L2CAP_ECRED_RECONF_REQ
  - L2CAP: Fix result of L2CAP_ECRED_CONN_RSP when MTU is too short
  - L2CAP: Fix response to L2CAP_ECRED_CONN_REQ
  - L2CAP: Fix not checking output MTU is acceptable on L2CAP_ECRED_CONN_REQ
  - L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
  - hci_qca: Cleanup on all setup failures
 -----BEGIN PGP SIGNATURE-----
 
 iQJNBAABCgA3FiEE7E6oRXp8w05ovYr/9JCA4xAyCykFAmmcw1EZHGx1aXoudm9u
 LmRlbnR6QGludGVsLmNvbQAKCRD0kIDjEDILKUTyD/4jtQwDrveC19zamF5n7lFY
 Oils6eftANcLFzLwTrMqGO7IxESga4qdNOf2vc/UgVSUfNqsPIUJ5El+LzpXZXAa
 sYBP/KudEX53CfU3fEVyPTUaWkZ4CdMRZeiCmgXqW7GxYbGw92SFuaSIHAP6Ep4s
 Z7Ryd1H0xhX9QPMc4g4IgoMiBiKzNs4GtlLSbDJcivAtbC/34nkMOxK9g+1DbU0F
 qzW+oPfYCpPzXTf20I1QIAMt5smnSM3Tuvo9u2pZRuEGpKjENxeY4hdAejfjeKA6
 RLWXm6JvMP2lUBT68plMQQdYyQ8DxG75sVjgSoQYIu2YTVnsX76t/kD2hhiHXH/Y
 nQoy4dtA1/5V7Ka0cfMhcvino4Rb9Gh3dsFKJOuWRT+aTY+gNhpyr56SuJh24Y3C
 7tUeEDI4fBkJGaRAbreVbaI5vw4kbSfi7IDOM/ccWDSLaG8HGaLOtn0IU8q4AgMa
 IkYzB5zwtiyM/zaSTO1k0HkpjR0wwftnTd+Fj2mUWdTwSeek64R9enmKYmg5UJrv
 14yhfLHFsbAQo+o1B3ZslnCdYQJpgFmyAInV6Jpunc78IE9+g/YA55K22JbDDSzI
 t9Zy25OWLyYZyuD1PzDkMlYU5OARNYeyRXbJ3w037LrpqRoEuFsK0qTmgi+kR9C7
 VR9IpCqgf4SJbL7ge83H8g==
 =JBaa
 -----END PGP SIGNATURE-----

Merge tag 'for-net-2026-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - purge error queues in socket destructors
 - hci_sync: Fix CIS host feature condition
 - L2CAP: Fix invalid response to L2CAP_ECRED_RECONF_REQ
 - L2CAP: Fix result of L2CAP_ECRED_CONN_RSP when MTU is too short
 - L2CAP: Fix response to L2CAP_ECRED_CONN_REQ
 - L2CAP: Fix not checking output MTU is acceptable on L2CAP_ECRED_CONN_REQ
 - L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
 - hci_qca: Cleanup on all setup failures

* tag 'for-net-2026-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
  Bluetooth: L2CAP: Fix not checking output MTU is acceptable on L2CAP_ECRED_CONN_REQ
  Bluetooth: Fix CIS host feature condition
  Bluetooth: L2CAP: Fix response to L2CAP_ECRED_CONN_REQ
  Bluetooth: hci_qca: Cleanup on all setup failures
  Bluetooth: purge error queues in socket destructors
  Bluetooth: L2CAP: Fix result of L2CAP_ECRED_CONN_RSP when MTU is too short
  Bluetooth: L2CAP: Fix invalid response to L2CAP_ECRED_RECONF_REQ
====================

Link: https://patch.msgid.link/20260223211634.3800315-1-luiz.dentz@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-02-24 15:03:08 +01:00
Sebastian Andrzej Siewior
983512f3a8 net: Drop the lock in skb_may_tx_timestamp()
skb_may_tx_timestamp() may acquire sock::sk_callback_lock. The lock must
not be taken in IRQ context, only softirq is okay. A few drivers receive
the timestamp via a dedicated interrupt and complete the TX timestamp
from that handler. This will lead to a deadlock if the lock is already
write-locked on the same CPU.

Taking the lock can be avoided. The socket (pointed by the skb) will
remain valid until the skb is released. The ->sk_socket and ->file
member will be set to NULL once the user closes the socket which may
happen before the timestamp arrives.
If we happen to observe the pointer while the socket is closing but
before the pointer is set to NULL then we may use it because both
pointer (and the file's cred member) are RCU freed.

Drop the lock. Use READ_ONCE() to obtain the individual pointer. Add a
matching WRITE_ONCE() where the pointer are cleared.

Link: https://lore.kernel.org/all/20260205145104.iWinkXHv@linutronix.de
Fixes: b245be1f4d ("net-timestamp: no-payload only sysctl")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260220183858.N4ERjFW6@linutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-02-24 11:27:29 +01:00
Luiz Augusto von Dentz
c28d2bff70 Bluetooth: L2CAP: Fix result of L2CAP_ECRED_CONN_RSP when MTU is too short
Test L2CAP/ECFC/BV-26-C expect the response to L2CAP_ECRED_CONN_REQ with
and MTU value < L2CAP_ECRED_MIN_MTU (64) to be L2CAP_CR_LE_INVALID_PARAMS
rather than L2CAP_CR_LE_UNACCEPT_PARAMS.

Also fix not including the correct number of CIDs in the response since
the spec requires all CIDs being rejected to be included in the
response.

Link: https://github.com/bluez/bluez/issues/1868
Fixes: 15f02b9105 ("Bluetooth: L2CAP: Add initial code for Enhanced Credit Based Mode")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2026-02-23 15:28:56 -05:00
Luiz Augusto von Dentz
7accb1c432 Bluetooth: L2CAP: Fix invalid response to L2CAP_ECRED_RECONF_REQ
This fixes responding with an invalid result caused by checking the
wrong size of CID which should have been (cmd_len - sizeof(*req)) and
on top of it the wrong result was use L2CAP_CR_LE_INVALID_PARAMS which
is invalid/reserved for reconf when running test like L2CAP/ECFC/BI-03-C:

> ACL Data RX: Handle 64 flags 0x02 dlen 14
      LE L2CAP: Enhanced Credit Reconfigure Request (0x19) ident 2 len 6
        MTU: 64
        MPS: 64
        Source CID: 64
< ACL Data TX: Handle 64 flags 0x00 dlen 10
      LE L2CAP: Enhanced Credit Reconfigure Respond (0x1a) ident 2 len 2
!        Result: Reserved (0x000c)
         Result: Reconfiguration failed - one or more Destination CIDs invalid (0x0003)

Fiix L2CAP/ECFC/BI-04-C which expects L2CAP_RECONF_INVALID_MPS (0x0002)
when more than one channel gets its MPS reduced:

> ACL Data RX: Handle 64 flags 0x02 dlen 16
      LE L2CAP: Enhanced Credit Reconfigure Request (0x19) ident 2 len 8
        MTU: 264
        MPS: 99
        Source CID: 64
!       Source CID: 65
< ACL Data TX: Handle 64 flags 0x00 dlen 10
      LE L2CAP: Enhanced Credit Reconfigure Respond (0x1a) ident 2 len 2
!        Result: Reconfiguration successful (0x0000)
         Result: Reconfiguration failed - reduction in size of MPS not allowed for more than one channel at a time (0x0002)

Fix L2CAP/ECFC/BI-05-C when SCID is invalid (85 unconnected):

> ACL Data RX: Handle 64 flags 0x02 dlen 14
      LE L2CAP: Enhanced Credit Reconfigure Request (0x19) ident 2 len 6
        MTU: 65
        MPS: 64
!        Source CID: 85
< ACL Data TX: Handle 64 flags 0x00 dlen 10
      LE L2CAP: Enhanced Credit Reconfigure Respond (0x1a) ident 2 len 2
!        Result: Reconfiguration successful (0x0000)
         Result: Reconfiguration failed - one or more Destination CIDs invalid (0x0003)

Fix L2CAP/ECFC/BI-06-C when MPS < L2CAP_ECRED_MIN_MPS (64):

> ACL Data RX: Handle 64 flags 0x02 dlen 14
      LE L2CAP: Enhanced Credit Reconfigure Request (0x19) ident 2 len 6
        MTU: 672
!       MPS: 63
        Source CID: 64
< ACL Data TX: Handle 64 flags 0x00 dlen 10
      LE L2CAP: Enhanced Credit Reconfigure Respond (0x1a) ident 2 len 2
!       Result: Reconfiguration failed - reduction in size of MPS not allowed for more than one channel at a time (0x0002)
        Result: Reconfiguration failed - other unacceptable parameters (0x0004)

Fix L2CAP/ECFC/BI-07-C when MPS reduced for more than one channel:

> ACL Data RX: Handle 64 flags 0x02 dlen 16
      LE L2CAP: Enhanced Credit Reconfigure Request (0x19) ident 3 len 8
        MTU: 84
!       MPS: 71
        Source CID: 64
!        Source CID: 65
< ACL Data TX: Handle 64 flags 0x00 dlen 10
      LE L2CAP: Enhanced Credit Reconfigure Respond (0x1a) ident 2 len 2
!       Result: Reconfiguration successful (0x0000)
        Result: Reconfiguration failed - reduction in size of MPS not allowed for more than one channel at a time (0x0002)

Link: https://github.com/bluez/bluez/issues/1865
Fixes: 15f02b9105 ("Bluetooth: L2CAP: Add initial code for Enhanced Credit Based Mode")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2026-02-23 15:23:37 -05:00
Linus Torvalds
551d442001 default_gfp(): avoid using the "newfangled" __VA_OPT__ trick
The default_gfp() helper that I added is not wrong, but it turns out
that it causes unnecessary headaches for 'sparse' which doesn't support
the use of __VA_OPT__ (introduced in C++20 and C23, and supported by gcc
and clang for a long time).

We do already use __VA_OPT__ in some other cases in the kernel (drm/xe
and btrfs), but it has been fairly limited.  Now it triggers for pretty
much everything, and sparse ends up not working at all.

We can use the traditional gcc ',##__VA_ARGS__' syntax instead: it may
not be the "C standard" way and is slightly less natural in this
context, but it is the traditional model for this and avoids the sparse
problem.

Reported-and-tested-by: Ricardo Ribalda <ribalda@chromium.org>
Reported-and-tested-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reported-by: Ben Dooks <ben.dooks@codethink.co.uk>
Fixes: e19e1b480a ("add default_gfp() helper macro and use it in the new *alloc_obj() helpers")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-23 09:33:08 -08:00
Rafael J. Wysocki
3afd8df024 PM: runtime: Change pm_runtime_put() return type to void
The primary role of pm_runtime_put() is to decrement the runtime PM
usage counter of the given device.  It always does that regardless of
the value returned by it later.

In addition, if the runtime PM usage counter after decrementation turns
out to be zero, a work item is queued up to check whether or not the
device can be suspended.  This is not guaranteed to succeed though and
even if it is successful, the device may still not be suspended going
forward.

There are multiple valid reasons why pm_runtime_put() may not decide to
queue up the work item mentioned above, including, but not limited to,
the case when user space has written "on" to the device's runtime PM
"control" file in sysfs.  In all of those cases, pm_runtime_put()
returns a negative error code (even though the device's runtime PM
usage counter has been successfully decremented by it) which is very
confusing.  In fact, its return value should only be used for debug
purposes and care should be taken when doing it even in that case.

Accordingly, to avoid the confusion mentioned above, change the return
type of pm_runtime_put() to void.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Link: https://patch.msgid.link/14387202.RDIVbhacDa@rafael.j.wysocki
2026-02-23 14:08:17 +01:00
Penghe Geng
901084c51a mmc: core: Avoid bitfield RMW for claim/retune flags
Move claimed and retune control flags out of the bitfield word to
avoid unrelated RMW side effects in asynchronous contexts.

The host->claimed bit shared a word with retune flags. Writes to claimed
in __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite
other bits when concurrent updates happen in other contexts, triggering
spurious WARN_ON(!host->claimed). Convert claimed, can_retune,
retune_now and retune_paused to bool to remove shared-word coupling.

Fixes: 6c0cedd1ef ("mmc: core: Introduce host claiming by context")
Fixes: 1e8e55b670 ("mmc: block: Add CQE support")
Cc: stable@vger.kernel.org
Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Penghe Geng <pgeng@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2026-02-23 13:45:50 +01:00
Mathieu Desnoyers
3b68df9781 rseq: slice ext: Ensure rseq feature size differs from original rseq size
Before rseq became extensible, its original size was 32 bytes even
though the active rseq area was only 20 bytes. This had the following
impact in terms of userspace ecosystem evolution:

* The GNU libc between 2.35 and 2.39 expose a __rseq_size symbol set
  to 32, even though the size of the active rseq area is really 20.
* The GNU libc 2.40 changes this __rseq_size to 20, thus making it
  express the active rseq area.
* Starting from glibc 2.41, __rseq_size corresponds to the
  AT_RSEQ_FEATURE_SIZE from getauxval(3).

This means that users of __rseq_size can always expect it to
correspond to the active rseq area, except for the value 32, for
which the active rseq area is 20 bytes.

Exposing a 32 bytes feature size would make life needlessly painful
for userspace. Therefore, add a reserved field at the end of the
rseq area to bump the feature size to 33 bytes. This reserved field
is expected to be replaced with whatever field will come next,
expecting that this field will be larger than 1 byte.

The effect of this change is to increase the size from 32 to 64 bytes
before we actually have fields using that memory.

Clarify the allocation size and alignment requirements in the struct
rseq uapi comment.

Change the value returned by getauxval(AT_RSEQ_ALIGN) to return the
value of the active rseq area size rounded up to next power of 2, which
guarantees that the rseq structure will always be aligned on the nearest
power of two large enough to contain it, even as it grows. Change the
alignment check in the rseq registration accordingly.

This will minimize the amount of ABI corner-cases we need to document
and require userspace to play games with. The rule stays simple when
__rseq_size != 32:

  #define rseq_field_available(field)	(__rseq_size >= offsetofend(struct rseq_abi, field))

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260220200642.1317826-3-mathieu.desnoyers@efficios.com
2026-02-23 11:19:19 +01:00
Arnd Bergmann
4c652a4772 rseq: Mark rseq_arm_slice_extension_timer() __always_inline
objtool warns about this function being called inside of a uaccess
section:

kernel/entry/common.o: warning: objtool: irqentry_exit+0x1dc: call to rseq_arm_slice_extension_timer() with UACCESS enabled

Interestingly, this happens with CONFIG_RSEQ_SLICE_EXTENSION disabled,
so this is an empty function, as the normal implementation is
already marked __always_inline.

I could reproduce this multiple times with gcc-11 but not with gcc-15,
so the compiler probably got better at identifying the trivial function.

Mark all the empty helpers for !RSEQ_SLICE_EXTENSION as __always_inline
for consistency, avoiding this warning.

Fixes: 0ac3b5c3dc ("rseq: Implement time slice extension enforcement timer")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260206074122.709580-1-arnd@kernel.org
2026-02-23 11:19:19 +01:00
Peter Zijlstra
6e3c0a4e1a sched/fair: Fix lag clamp
Vincent reported that he was seeing undue lag clamping in a mixed
slice workload. Implement the max_slice tracking as per the todo
comment.

Fixes: 147f3efaa2 ("sched/fair: Implement an EEVDF-like scheduling policy")
Reported-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: Shubhang Kaushik <shubhang@os.amperecomputing.com>
Link: https://patch.msgid.link/20250422101628.GA33555@noisy.programming.kicks-ass.net
2026-02-23 11:19:18 +01:00
Maxime Ripard
c17ee635fd
Merge drm/drm-fixes into drm-misc-fixes
7.0-rc1 was just released, let's merge it to kick the new release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>
2026-02-23 10:09:45 +01:00
Linus Torvalds
fbf3380361 fsverity fixes for v7.0-rc1
- Fix a build error on parisc
 
 - Remove the non-large-folio-aware function fsverity_verify_page()
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYIADIWIQSacvsUNc7UX4ntmEPzXCl4vpKOKwUCaZtg+xQcZWJpZ2dlcnNA
 a2VybmVsLm9yZwAKCRDzXCl4vpKOKwQ+AQCiXEYAibl3vHRgQo7qEPCC5or4FtkF
 HZ0ERRArhsU17AD/TKHE/AJkyFrwK4rGTb6I9Wi1OXnpG7jihZlYjj03Ag4=
 =CUql
 -----END PGP SIGNATURE-----

Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux

Pull fsverity fixes from Eric Biggers:

 - Fix a build error on parisc

 - Remove the non-large-folio-aware function fsverity_verify_page()

* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux:
  fsverity: fix build error by adding fsverity_readahead() stub
  fsverity: remove fsverity_verify_page()
  f2fs: make f2fs_verify_cluster() partially large-folio-aware
  f2fs: remove unnecessary ClearPageUptodate in f2fs_verify_cluster()
2026-02-22 13:12:04 -08:00
Linus Torvalds
d2ba6e9c0a rv fixes for v7.0
Summary of changes:
 
 - Fix multiple definition of __pcpu_unique_da_mon_this
 
   After refactoring monitors, we used static per-cpu variables with the
   same names across different per-cpu monitors. This is explicitly
   disallowed for modules on some architectures (alpha) or if
   CONFIG_DEBUG_FORCE_WEAK_PER_CPU is enabled (e.g. Fedora's debug
   kernel). Make sure all those variables have different names to avoid
   compilation issues.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCaZoJ1BQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6qkykAP41lj9VAe0dM81f20IfOBhqIBZPS6MP
 ajRGZ9bz1ZiJwwD/dHm+APheD7umImzoDXpW1IJxgNPlZTnpte3WyhIYaQs=
 =HxRz
 -----END PGP SIGNATURE-----

Merge tag 'trace-rv-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull runtime verifier fix from Steven Rostedt:

 - Fix multiple definition of __pcpu_unique_da_mon_this

   After refactoring monitors, we used static per-cpu variables with the
   same names across different per-cpu monitors. This is explicitly
   disallowed for modules on some architectures (alpha) or if
   CONFIG_DEBUG_FORCE_WEAK_PER_CPU is enabled (e.g. Fedora's debug
   kernel). Make sure all those variables have different names to avoid
   compilation issues.

* tag 'trace-rv-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  rv: Fix multiple definition of __pcpu_unique_da_mon_this
2026-02-22 08:40:13 -08:00
Linus Torvalds
32a92f8c89 Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
This converts some of the visually simpler cases that have been split
over multiple lines.  I only did the ones that are easy to verify the
resulting diff by having just that final GFP_KERNEL argument on the next
line.

Somebody should probably do a proper coccinelle script for this, but for
me the trivial script actually resulted in an assertion failure in the
middle of the script.  I probably had made it a bit _too_ trivial.

So after fighting that far a while I decided to just do some of the
syntactically simpler cases with variations of the previous 'sed'
scripts.

The more syntactically complex multi-line cases would mostly really want
whitespace cleanup anyway.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 20:03:00 -08:00
Linus Torvalds
bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00
Linus Torvalds
e19e1b480a add default_gfp() helper macro and use it in the new *alloc_obj() helpers
Most simple allocations use GFP_KERNEL, and with the new allocation
helpers being introduced, let's just take advantage of that to simplify
that default case.

It's a numbers game:

    git grep 'alloc_obj(' |
	sed 's/.*\(GFP_[_A-Z]*\).*/\1/' |
	sort | uniq -c | sort -n | tail

shows that about 90% of all those new allocator instances just use that
standard GFP_KERNEL.

Those helpers are already macros, and we can easily just make it be the
default case when the gfp argument is missing.

And yes, we could do that for all the legacy interfaces too, but let's
keep it to just the new ones at least for now, since those all got
converted recently anyway, so this is not any "extra" noise outside of
that limited conversion.

And, in fact, I want to do this before doing the -rc1 release, exactly
so that we don't get extra merge conflicts.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:50 -08:00
Linus Torvalds
fa5c82f4d2 slab.h: disable completely broken overflow handling in flex allocations
Commit 69050f8d6d ("treewide: Replace kmalloc with kmalloc_obj for
non-scalar types") started using the new allocation helpers, and in the
process showed that they were completely non-working.

The overflow logic in overflows_flex_counter_type() is completely the
wrong way around, and that broke __alloc_flex() completely.  By chance,
the resulting code was then such a mess that clang generated
sufficiently garbage code that objtool warned about it all.  Which made
it somewhat quicker to narrow things down.

While fixing overflows_flex_counter_type() would presumably fix this
all, I'm excising the whole broken overflow logic from __alloc_flex(),
because we don't want that kind of code in basic allocation functions
anyway.

That (no longer) broken overflows_flex_counter_type() thing needs to be
inserted into the actual __set_flex_counter() logic in the unlikely case
that we ever want this at all.  And made conditional.

Fixes: 81cee9166a ("compiler_types: Introduce __flex_counter() and family")
Fixes: 69050f8d6d ("treewide: Replace kmalloc with kmalloc_obj for non-scalar types")
Cc: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/all/CAHk-=whEd020BYzGTzYrENjD9Z5_82xx6h8HsQvH5xDSnv0=Hw@mail.gmail.com/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 15:12:09 -08:00
Linus Torvalds
8934827db5 kmalloc_obj treewide refactoring for v7.0-rc1
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRSPkdeREjth1dHnSE2KwveOeQkuwUCaZl14wAKCRA2KwveOeQk
 uz8aAQCBFLYlij3Y3ivVADkBxuVF3xECaznFya41ENYsBwlHdwEArXqMyNrw+DiG
 TvWCK/tiddNmGIRpI2sxBFzyRpsHfAY=
 =rVD3
 -----END PGP SIGNATURE-----

Merge tag 'kmalloc_obj-treewide-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull kmalloc_obj conversion from Kees Cook:
 "This does the tree-wide conversion to kmalloc_obj() and friends using
  coccinelle, with a subsequent small manual cleanup of whitespace
  alignment that coccinelle does not handle.

  This uncovered a clang bug in __builtin_counted_by_ref(), so the
  conversion is preceded by disabling that for current versions of
  clang.  The imminent clang 22.1 release has the fix.

  I've done allmodconfig build tests for x86_64, arm64, i386, and arm. I
  did defconfig builds for alpha, m68k, mips, parisc, powerpc, riscv,
  s390, sparc, sh, arc, csky, xtensa, hexagon, and openrisc"

* tag 'kmalloc_obj-treewide-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kmalloc_obj: Clean up after treewide replacements
  treewide: Replace kmalloc with kmalloc_obj for non-scalar types
  compiler_types: Disable __builtin_counted_by_ref for Clang
2026-02-21 11:02:58 -08:00
Linus Torvalds
9813616045 NTB updates include debugfs improvements, correctness fixes,
cleanups, and new hardware support. ntb_transport QP stats are
 converted to seq_file, a tx_memcpy_offload module parameter is
 introduced with associated ordering fixes, and a debugfs queue
 name truncation bug is corrected. Additional fixes address format
 specifier mismatches in ntb_tool and boundary conditions in the
 Switchtec driver, while unused MSI helpers are removed and the
 codebase migrates to dma_map_phys(). Intel Gen6 (Diamond Rapids)
 NTB support is also added.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEoE9b9c3U2JxX98mqbmZLrHqL0iMFAmmZvucACgkQbmZLrHqL
 0iMQ+w/9E6w4FMT5QN8WlSq51RKEyzmSekja0DGyKmUzsWqES+YPN1Tu7rnqZBaF
 TmX8n86Fr5oF+I/0gOx9AeBBTIuX4+ZpNi1W3DOTeV+ea8kHDzGzDKAYZixjntbL
 iYGGOrd5zFzeYVCSsMkuhPtFLUKOeX9+oGlQ7hHYiV0rqiOkRycLFksuTwHI3elm
 fUJPolTeKZrIWVeHUK11mYkQ62WfVCRq2LqGLgk47hvx2osAE6PAZ+TB4zJc5o5L
 OUX/XhZRzakjFjtcHiDyiLRQ12d9/i2Ct/HReaCJPKyyG0RZWotDvrXabgKfTzuP
 Sl1Xtkn290fl/1CtlFiJueEl5LU83JlOzNaFkFBc/G2erYUTrYV5SLTKraOU/VLY
 CKNqovI0elePTEA710g9f44VJkDsPZ4Y1JC0js7gb9kxFpj2S1mhxOjMhieQWUqX
 Rl0MAKA8yFnVsqk5QKCerGEHpr6rwWXKeuC0VRpe50Q8LbvwJmsu6FxTIlfeaI3d
 vIZRZoGRCJeho/YL2X4y71oe5VQrDvktWvd38jDhHeBwe5SDo9xYIie5KsdtcXsj
 HNwrj7xZxFDWG2XlirIR1KewjoG9JkqbB73KtVlRSm/3+Pb48xBD/mqXLnohrDDj
 YSXO9COR//iisWdY29vn1KV9INfktUQ59ZunU0HvFsX4xXcLj3o=
 =UZw9
 -----END PGP SIGNATURE-----

Merge tag 'ntb-7.0' of https://github.com/jonmason/ntb

Pull NTB (PCIe non-transparent bridge) updates from Jon Mason:
 "NTB updates include debugfs improvements, correctness fixes, cleanups,
  and new hardware support:

  ntb_transport QP stats are converted to seq_file, a tx_memcpy_offload
  module parameter is introduced with associated ordering fixes, and a
  debugfs queue name truncation bug is corrected.

  Additional fixes address format specifier mismatches in ntb_tool and
  boundary conditions in the Switchtec driver, while unused MSI helpers
  are removed and the codebase migrates to dma_map_phys().

  Intel Gen6 (Diamond Rapids) NTB support is also added"

* tag 'ntb-7.0' of https://github.com/jonmason/ntb:
  NTB: ntb_transport: Use seq_file for QP stats debugfs
  NTB: ntb_transport: Fix too small buffer for debugfs_name
  ntb/ntb_tool: correct sscanf format for u64 and size_t in tool_peer_mw_trans_write
  ntb: intel: Add Intel Gen6 NTB support for DiamondRapids
  NTB/msi: Remove unused functions
  ntb: ntb_hw_switchtec: Increase MAX_MWS limit to 256
  ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access
  ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut
  NTB: epf: allow built-in build
  ntb: migrate to dma_map_phys instead of map_page
  NTB: ntb_transport: Add 'tx_memcpy_offload' module option
  NTB: ntb_transport: Remove unused 'retries' field from ntb_queue_entry
2026-02-21 10:20:32 -08:00
Linus Torvalds
f9d66e64a2 io_uring-20260221
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmmZszYQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpvW9D/9qI0JrQ7zw9/zjFVOqFHVbwJUErTwUiSE/
 bKpbDOUcm1utiTIw8nWuhhmXbPq8MT+3Uyyk24UFpcIM+QZrqUHRRPYcqHwNy0mw
 3QXZut2QkwHKO/tWoKXIguCVQKtPteBjfH+La1IRZPLKK+MozQEloGMulbZwIP0j
 ynEX7tA8VYwuGtgmzBiTt7Ba2W5EIJ0SSfmdY9XajKDHrZCksx5iHnC/uJg0qEc0
 QQr4YZisyz4VxG4MxsJvpv6/wiic07MRSYa5cJXntknmPGc9zj6wg79WWB/lkbuA
 w95+X+EorHyCvKk2Ny9uwl1/UOp9VQbKQnVIZ58LBC4ILPj6Qk7a7WyxTbfl358d
 QNhrcspgcLwakQkVkhR1Z4SaCqMdc6i1hXx5m2nhXFevKipeyg11uoM75bZEzWsN
 63+6+S1upwSqFTk2nto8gKg+7aMGOvjT/Ae0kNvUD/WPXSkC66gSzADZdv2C4i4Y
 QdFs8UN8jKRXd5Rx7pthAM0E//XFHko/tGJnHUIzQ3Nk7xeXp4BeXOdp/m/FvpDe
 BakTvLHvvk5s1X9Bkv5hSXua6ZBFlgcsqn5VdVplQOdWPKwU0Mjg28z6AAzdZxLF
 mCcgDqDqls19E9HI7nFJOUJtBQjoCl4sVEuPvs06agY04sJTXWkYph5pwhkNJOKD
 NwumZJpb2A==
 =Pkge
 -----END PGP SIGNATURE-----

Merge tag 'io_uring-20260221' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull io_uring fixes from Jens Axboe:

 - A fix for a missing URING_CMD128 opcode check, fixing an issue with
   the SQE mixed mode support introduced in 6.19. Merged late due to
   having multiple dependencies

 - Add sqe->cmd size checking for big SQEs, similar to what we have for
   normal sized SQEs

 - Fix a race condition in zcrx, that leads to a double free

* tag 'io_uring-20260221' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: Add size check for sqe->cmd
  io_uring: add IORING_OP_URING_CMD128 to opcode checks
  io_uring/zcrx: fix user_ref race between scrub and refill paths
2026-02-21 10:05:49 -08:00
Kees Cook
7a70c15bd1 kmalloc_obj: Clean up after treewide replacements
Coccinelle doesn't handle re-indenting line escapes. Fix the 2 places
where these got misaligned.

Remove 2 now-redundant type casts, found with:
$ git grep -P 'struct (\S+).*\)\s*k\S+alloc_(objs?|flex)\(struct \1'

Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-21 01:02:52 -08:00