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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws-5.15 | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure-5.15 | < any | UNKNOWN |
git.kernel.org/linus/aa49c90894d06e18a1ee7c095edbd2f37c232d02 (6.7-rc1)
git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c
git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0
git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809
git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91
git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1
git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02
git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b
launchpad.net/bugs/cve/CVE-2023-52791
nvd.nist.gov/vuln/detail/CVE-2023-52791
security-tracker.debian.org/tracker/CVE-2023-52791
www.cve.org/CVERecord?id=CVE-2023-52791