{"id":"CVE-2022-49304","summary":"drivers: tty: serial: Fix deadlock in sa1100_set_termios()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: tty: serial: Fix deadlock in sa1100_set_termios()\n\nThere is a deadlock in sa1100_set_termios(), which is shown\nbelow:\n\n   (Thread 1)              |      (Thread 2)\n                           | sa1100_enable_ms()\nsa1100_set_termios()       |  mod_timer()\n spin_lock_irqsave() //(1) |  (wait a time)\n ...                       | sa1100_timeout()\n del_timer_sync()          |  spin_lock_irqsave() //(2)\n (wait timer to stop)      |  ...\n\nWe hold sport-\u003eport.lock in position (1) of thread 1 and\nuse del_timer_sync() to wait timer to stop, but timer handler\nalso need sport-\u003eport.lock in position (2) of thread 2. As a result,\nsa1100_set_termios() will block forever.\n\nThis patch moves del_timer_sync() before spin_lock_irqsave()\nin order to prevent the deadlock.","modified":"2026-04-02T08:27:28.294344Z","published":"2025-02-26T02:10:37.726Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49304.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0976808d0d171ec837d4bd3e9f4ad4a00ab703b8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/09a5958a2452ad22d0cb638711ef34ea1863a829"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34d91e555e5582cffdbcbb75517bc9217866823e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/553213432ef0c295becdc08c0207d2094468f673"},{"type":"WEB","url":"https://git.kernel.org/stable/c/62b2caef400c1738b6d22f636c628d9f85cd4c4c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e2273eefab54a521d9c59efb6e1114e742bdf41"},{"type":"WEB","url":"https://git.kernel.org/stable/c/85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/920f0ae7a129ffee98a106e3bbdfd61a2a59e939"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49304.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49304"},{"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":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"0976808d0d171ec837d4bd3e9f4ad4a00ab703b8"},{"fixed":"85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2"},{"fixed":"920f0ae7a129ffee98a106e3bbdfd61a2a59e939"},{"fixed":"09a5958a2452ad22d0cb638711ef34ea1863a829"},{"fixed":"6e2273eefab54a521d9c59efb6e1114e742bdf41"},{"fixed":"2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b"},{"fixed":"553213432ef0c295becdc08c0207d2094468f673"},{"fixed":"34d91e555e5582cffdbcbb75517bc9217866823e"},{"fixed":"62b2caef400c1738b6d22f636c628d9f85cd4c4c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49304.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}