CVE - CVE-2024-56701

CVE-ID
CVE-2024-56701	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/525e18f1ba7c2b098c8ba587fb397efb34a6574c URL:https://git.kernel.org/stable/c/525e18f1ba7c2b098c8ba587fb397efb34a6574c MISC:https://git.kernel.org/stable/c/6956c0e7346ce1bbfc726755aa8da10d26e84276 URL:https://git.kernel.org/stable/c/6956c0e7346ce1bbfc726755aa8da10d26e84276 MISC:https://git.kernel.org/stable/c/a246daa26b717e755ccc9061f47f7cd1c0b358dd URL:https://git.kernel.org/stable/c/a246daa26b717e755ccc9061f47f7cd1c0b358dd MISC:https://git.kernel.org/stable/c/b125d0cf1adde7b2b47d7337fed7e9133eea3463 URL:https://git.kernel.org/stable/c/b125d0cf1adde7b2b47d7337fed7e9133eea3463 MISC:https://git.kernel.org/stable/c/cadae3a45d23aa4f6485938a67cbc47aaaa25e38 URL:https://git.kernel.org/stable/c/cadae3a45d23aa4f6485938a67cbc47aaaa25e38 MISC:https://git.kernel.org/stable/c/f6ec133668757f84e5143f1eb141fd0b83778b9e URL:https://git.kernel.org/stable/c/f6ec133668757f84e5143f1eb141fd0b83778b9e MISC:https://git.kernel.org/stable/c/fa5b5ea257135e771b489c83a2e93b5935d0108e URL:https://git.kernel.org/stable/c/fa5b5ea257135e771b489c83a2e93b5935d0108e
Assigning CNA
kernel.org
Date Record Created
20241227	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241227)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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