[ Sasha's backport helper bot ]
Hi,
✅ All tests passed successfully. No issues detected. No action required from the submitter.
The upstream commit SHA1 provided is correct: 0a2ed70a549e61c5181bad5db418d223b68ae932
WARNING: Author mismatch between patch and upstream commit: Backport author: Nobuhiro Iwamatsunobuhiro1.iwamatsu@toshiba.co.jp Commit author: Seiji Nishikawasnishika@redhat.com
Status in newer kernel trees: 6.15.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Present (different SHA1: 68a8e45743d6) 6.1.y | Present (different SHA1: 68a599da16eb) 5.15.y | Present (different SHA1: 92e5661b7d07) 5.10.y | Not found
Note: The patch differs from the upstream commit: --- 1: 0a2ed70a549e6 ! 1: bc54e445630f7 ACPI: PAD: fix crash in exit_round_robin() @@ Metadata ## Commit message ## ACPI: PAD: fix crash in exit_round_robin()
+ commit 0a2ed70a549e61c5181bad5db418d223b68ae932 upstream. + The kernel occasionally crashes in cpumask_clear_cpu(), which is called within exit_round_robin(), because when executing clear_bit(nr, addr) with nr set to 0xffffffff, the address calculation may cause misalignment within @@ Commit message Link: https://patch.msgid.link/20240825141352.25280-1-snishika@redhat.com [ rjw: Subject edit, avoid updates to the same value ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com + Link: https://nvd.nist.gov/vuln/detail/CVE-2024-49935 + Signed-off-by: Nobuhiro Iwamatsu (CIP) nobuhiro1.iwamatsu@toshiba.co.jp
## drivers/acpi/acpi_pad.c ## -@@ drivers/acpi/acpi_pad.c: static void exit_round_robin(unsigned int tsk_index) +@@ drivers/acpi/acpi_pad.c: static void round_robin_cpu(unsigned int tsk_index) + static void exit_round_robin(unsigned int tsk_index) { struct cpumask *pad_busy_cpus = to_cpumask(pad_busy_cpus_bits); - - cpumask_clear_cpu(tsk_in_cpu[tsk_index], pad_busy_cpus); - tsk_in_cpu[tsk_index] = -1; ++ + if (tsk_in_cpu[tsk_index] != -1) { + cpumask_clear_cpu(tsk_in_cpu[tsk_index], pad_busy_cpus); + tsk_in_cpu[tsk_index] = -1; ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-5.4.y | Success | Success | | stable/linux-5.10.y | Success | Success |