{"id":"CVE-2023-52699","summary":"sysv: don't call sb_bread() with pointers_lock held","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsysv: don't call sb_bread() with pointers_lock held\n\nsyzbot is reporting sleep in atomic context in SysV filesystem [1], for\nsb_bread() is called with rw_spinlock held.\n\nA \"write_lock(&pointers_lock) =\u003e read_lock(&pointers_lock) deadlock\" bug\nand a \"sb_bread() with write_lock(&pointers_lock)\" bug were introduced by\n\"Replace BKL for chain locking with sysvfs-private rwlock\" in Linux 2.5.12.\n\nThen, \"[PATCH] err1-40: sysvfs locking fix\" in Linux 2.6.8 fixed the\nformer bug by moving pointers_lock lock to the callers, but instead\nintroduced a \"sb_bread() with read_lock(&pointers_lock)\" bug (which made\nthis problem easier to hit).\n\nAl Viro suggested that why not to do like get_branch()/get_block()/\nfind_shared() in Minix filesystem does. And doing like that is almost a\nrevert of \"[PATCH] err1-40: sysvfs locking fix\" except that get_branch()\n from with find_shared() is called without write_lock(&pointers_lock).","modified":"2026-04-02T09:43:16.522470Z","published":"2024-05-19T10:10:30.381Z","related":["SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","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-2023-52699.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09"},{"type":"WEB","url":"https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52699.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52699"},{"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":"13b33feb2ebddc2b1aa607f553566b18a4af1d76"},{"fixed":"1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f"},{"fixed":"674c1c4229e743070e09db63a23442950ff000d1"},{"fixed":"fd203d2c671bdee9ab77090ff394d3b71b627927"},{"fixed":"53cb1e52c9db618c08335984d1ca80db220ccf09"},{"fixed":"89e8524135a3902e7563a5a59b7b5ec1bf4904ac"},{"fixed":"a69224223746ab96d43e5db9d22d136827b7e2d3"},{"fixed":"f123dc86388cb669c3d6322702dc441abc35c31e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52699.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}