CVE-2023-52791 Affecting dlm-kmp-default package, versions <6.4.0-150600.23.14.2
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Test your applications- Snyk ID SNYK-SLES156-DLMKMPDEFAULT-7549418
- published 23 Jul 2024
- disclosed 22 Jul 2024
Introduced: 22 Jul 2024
CVE-2023-52791 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 dlm-kmp-default to version 6.4.0-150600.23.14.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dlm-kmp-default package and not the dlm-kmp-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
i2c: core: Run atomic i2c xfer when !preemptible
Since bae1d3a05a8b, i2c transfers are non-atomic if preemption is disabled. However, non-atomic i2c transfers require preemption (e.g. in wait_for_completion() while waiting for the DMA).
panic() calls preempt_disable_notrace() before calling emergency_restart(). Therefore, if an i2c device is used for the restart, the xfer should be atomic. This avoids warnings like:
[ 12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0 [ 12.676926] Voluntary context switch within RCU read-side critical section! ... [ 12.742376] schedule_timeout from wait_for_completion_timeout+0x90/0x114 [ 12.749179] wait_for_completion_timeout from tegra_i2c_wait_completion+0x40/0x70 ... [ 12.994527] atomic_notifier_call_chain from machine_restart+0x34/0x58 [ 13.001050] machine_restart from panic+0x2a8/0x32c
Use !preemptible() instead, which is basically the same check as pre-v5.2.
References
- https://www.suse.com/security/cve/CVE-2023-52791.html
- https://bugzilla.suse.com/1225108
- https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c
- https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0
- https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809
- https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91
- https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1
- https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02
- https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b