CVE-2024-56701 | THREATINT

Description

In 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

PUBLISHED Reserved 2024-12-27 | Published 2024-12-28 | Updated 2025-11-03 | Assigner Linux

Product status

Default status

unaffected

06220d78f24a20549757be1014e57c382406cc92 (git) before 6956c0e7346ce1bbfc726755aa8da10d26e84276

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before f6ec133668757f84e5143f1eb141fd0b83778b9e

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before fa5b5ea257135e771b489c83a2e93b5935d0108e

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before a246daa26b717e755ccc9061f47f7cd1c0b358dd

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before b125d0cf1adde7b2b47d7337fed7e9133eea3463

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before 525e18f1ba7c2b098c8ba587fb397efb34a6574c

affected

06220d78f24a20549757be1014e57c382406cc92 (git) before cadae3a45d23aa4f6485938a67cbc47aaaa25e38

affected

Default status

affected

5.3

affected

Any version before 5.3

unaffected

5.10.231 (semver)

unaffected

5.15.174 (semver)

unaffected

6.1.120 (semver)

unaffected

6.6.64 (semver)

unaffected

6.11.11 (semver)

unaffected

6.12.2 (semver)

unaffected

6.13 (original_commit_for_fix)

unaffected

References

lists.debian.org/debian-lts-announce/2025/03/msg00001.html

git.kernel.org/...c/6956c0e7346ce1bbfc726755aa8da10d26e84276

git.kernel.org/...c/f6ec133668757f84e5143f1eb141fd0b83778b9e

git.kernel.org/...c/fa5b5ea257135e771b489c83a2e93b5935d0108e

git.kernel.org/...c/a246daa26b717e755ccc9061f47f7cd1c0b358dd

git.kernel.org/...c/b125d0cf1adde7b2b47d7337fed7e9133eea3463

git.kernel.org/...c/525e18f1ba7c2b098c8ba587fb397efb34a6574c

git.kernel.org/...c/cadae3a45d23aa4f6485938a67cbc47aaaa25e38

cve.org (CVE-2024-56701)

nvd.nist.gov (CVE-2024-56701)

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