powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-56701
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-12-28 10:15:17 UTC
Updated2026-11-05 21:17:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore The dtl_access_lock needs to be a rw_sempahore, a sleeping lock, because the code calls kmalloc() while holding it, which can sleep: # echo 1 > /proc/powerpc/vcpudispatch_stats BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh preempt_count: 1, expected: 0 3 locks held by sh/199: #0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x324/0x438 #1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, at: vcpudispatch_stats_write+0xd4/0x5f4 #2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, at: vcpudispatch_stats_write+0x220/0x5f4 CPU: 0 PID: 199 Comm: sh Not tainted 6.10.0-rc4 #152 Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries Call Trace: dump_stack_lvl+0x130/0x148 (unreliable) __might_resched+0x174/0x410 kmem_cache_alloc_noprof+0x340/0x3d0 alloc_dtl_buffers+0x124/0x1ac vcpudispatch_stats_write+0x2a8/0x5f4 proc_reg_write+0xf4/0x150 vfs_write+0xfc/0x438 ksys_write+0x88/0x148 system_call_exception+0x1c4/0x5a0 system_call_common+0xf4/0x258

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 6956c0e7346ce1bbfc726755aa8da10d26e84276 git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 f6ec133668757f84e5143f1eb141fd0b83778b9e git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 fa5b5ea257135e771b489c83a2e93b5935d0108e git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 a246daa26b717e755ccc9061f47f7cd1c0b358dd git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 b125d0cf1adde7b2b47d7337fed7e9133eea3463 git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 525e18f1ba7c2b098c8ba587fb397efb34a6574c git Not specified
CNA Linux Linux affected 06220d78f24a20549757be1014e57c382406cc92 cadae3a45d23aa4f6485938a67cbc47aaaa25e38 git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 semver Not specified
CNA Linux Linux unaffected 5.10.231 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.174 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.120 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.64 6.6.* semver Not specified
CNA Linux Linux unaffected 6.11.11 6.11.* semver Not specified
CNA Linux Linux unaffected 6.12.2 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6956c0e7346ce1bbfc726755aa8da10d26e84276 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fa5b5ea257135e771b489c83a2e93b5935d0108e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a246daa26b717e755ccc9061f47f7cd1c0b358dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f6ec133668757f84e5143f1eb141fd0b83778b9e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/525e18f1ba7c2b098c8ba587fb397efb34a6574c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b125d0cf1adde7b2b47d7337fed7e9133eea3463 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/cadae3a45d23aa4f6485938a67cbc47aaaa25e38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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