{"id":"CVE-2023-52791","summary":"i2c: core: Run atomic i2c xfer when !preemptible","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Run atomic i2c xfer when !preemptible\n\nSince bae1d3a05a8b, i2c transfers are non-atomic if preemption is\ndisabled. However, non-atomic i2c transfers require preemption (e.g. in\nwait_for_completion() while waiting for the DMA).\n\npanic() calls preempt_disable_notrace() before calling\nemergency_restart(). Therefore, if an i2c device is used for the\nrestart, the xfer should be atomic. This avoids warnings like:\n\n[   12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0\n[   12.676926] Voluntary context switch within RCU read-side critical section!\n...\n[   12.742376]  schedule_timeout from wait_for_completion_timeout+0x90/0x114\n[   12.749179]  wait_for_completion_timeout from tegra_i2c_wait_completion+0x40/0x70\n...\n[   12.994527]  atomic_notifier_call_chain from machine_restart+0x34/0x58\n[   13.001050]  machine_restart from panic+0x2a8/0x32c\n\nUse !preemptible() instead, which is basically the same check as\npre-v5.2.","modified":"2026-04-02T09:43:20.851396Z","published":"2024-05-21T15:31:06.997Z","related":["ALSA-2024:5102","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52791.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52791.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52791"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bae1d3a05a8b99bd748168bbf8155a1d047c562e"},{"fixed":"25eb381a736e7ae39a4245ef5c96484eb1073809"},{"fixed":"25284c46b657f48c0f3880a2e0706c70d81182c0"},{"fixed":"f6237afabc349c1c7909db00e15d2816519e0d2b"},{"fixed":"185f3617adc8fe45e40489b458f03911f0dec46c"},{"fixed":"8c3fa52a46ff4d208cefb1a462ec94e0043a91e1"},{"fixed":"3473cf43b9068b9dfef2f545f833f33c6a544b91"},{"fixed":"aa49c90894d06e18a1ee7c095edbd2f37c232d02"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52791.json"}}],"schema_version":"1.7.5"}