CVE - CVE-2023-52791

CVE-ID
CVE-2023-52791	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: 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
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/185f3617adc8fe45e40489b458f03911f0dec46c URL:https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c MISC:https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0 URL:https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0 MISC:https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809 URL:https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809 MISC:https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91 URL:https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91 MISC:https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1 URL:https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1 MISC:https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02 URL:https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02 MISC:https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b URL:https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b
Assigning CNA
kernel.org
Date Record Created
20240521	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 (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)