{"id":"CVE-2026-80879","summary":"ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix circular locking dependency in ocfs2_dio_end_io_write\n\nA circular locking dependency involves INODE_ALLOC_SYSTEM_INODE,\nEXTENT_ALLOC_SYSTEM_INODE, and ORPHAN_DIR_SYSTEM_INODE.\n\n1. ocfs2_mknod() acquires INODE_ALLOC then EXTENT_ALLOC.\n\n2. ocfs2_dio_end_io_write() acquires EXTENT_ALLOC for unwritten\n   extents, then ORPHAN_DIR via ocfs2_del_inode_from_orphan() while still\n   holding EXTENT_ALLOC.\n\n3. ocfs2_wipe_inode() acquires ORPHAN_DIR then INODE_ALLOC via\n   ocfs2_remove_inode.\n\nBreak the cycle in ocfs2_dio_end_io_write() by freeing the allocation\ncontexts (releasing EXTENT_ALLOC) before acquiring ORPHAN_DIR.\n\nWARNING: possible circular locking dependency detected\n------------------------------------------------------\nis trying to acquire lock:\nffff8881e78b33a0\n(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at:\nocfs2_evict_inode+0x1539/0x43b0 fs/ocfs2/inode.c:1299\n\nbut task is already holding lock:\nffff8881e78b4fa0\n(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at:\nocfs2_evict_inode+0xe97/0x43b0 fs/ocfs2/inode.c:1299\n\nthe existing dependency chain (in reverse order) is:\n\n-\u003e #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:\n       inode_lock include/linux/fs.h:1029 [inline]\n       ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2728\n       ocfs2_dio_end_io+0xf9c/0x1370 fs/ocfs2/aops.c:2418\n       dio_complete+0x25b/0x790 fs/direct-io.c:281\n\n-\u003e #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:\n       inode_lock include/linux/fs.h:1029 [inline]\n       ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882\n       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0\n       fs/ocfs2/suballoc.c:1078\n       ocfs2_mknod+0x10f3/0x2260 fs/ocfs2/namei.c:351\n\n-\u003e #0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:\n       __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237\n       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868\n       down_write+0x96/0x200 kernel/locking/rwsem.c:1625\n       inode_lock include/linux/fs.h:1029 [inline]\n       ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]\n       ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]\n       ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]\n       ocfs2_evict_inode+0x1539/0x43b0 fs/ocfs2/inode.c:1299\n\nChain exists of:\n  &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] --\u003e\n  &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --\u003e\n  &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]\n\n Possible unsafe locking scenario:\n\n       CPU0                    CPU1\n       ----                    ----\n  lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);\n                               lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);\n                               lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);\n  lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);\n\n *** DEADLOCK ***","modified":"2026-09-06T03:47:07.271683193Z","published":"2026-09-04T16:49:02.905Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80879.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/137e8b4823a9a11928428d4ec0a0cacb2f50a769"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4273548e418bd935430d35e9d052870f323441f3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/49b34bd3ad69611af03590a23abf2cda9ac1073d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae1f3460833d3e427420ab260278ec0e45d68c86"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f0ae0a6ca87dc2d4a789f71cdedb808ba6c16990"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f3dd1e534e9de64669415f8239e0094afecfed78"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff187c502b39389b0d732cb7050a3db8e5ebfcd6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff6f26c58421614b02694ac9d219ac61d924bc68"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80879.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80879"},{"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":"97c03c0e9f73a5049794b3c69ee60fb5e8b0ebd8"},{"fixed":"f0ae0a6ca87dc2d4a789f71cdedb808ba6c16990"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1e99bb19994246514d63e656492904176f9d5edd"},{"fixed":"137e8b4823a9a11928428d4ec0a0cacb2f50a769"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"91e05ac2336d00d5b99fc774be4bd50039084796"},{"fixed":"4273548e418bd935430d35e9d052870f323441f3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"886f97fa59d0bbfa9859fb1a66dd9e014b522d89"},{"fixed":"49b34bd3ad69611af03590a23abf2cda9ac1073d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ea5bb1d20da756e4f41a48dad42b2e7d6e73f71e"},{"fixed":"ff187c502b39389b0d732cb7050a3db8e5ebfcd6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3c636a3edca9c3f180b3079f94fe7e115730d9c6"},{"fixed":"ae1f3460833d3e427420ab260278ec0e45d68c86"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d647c5b2fbf81560818dacade360abc8c00a9665"},{"fixed":"f3dd1e534e9de64669415f8239e0094afecfed78"},{"fixed":"ff6f26c58421614b02694ac9d219ac61d924bc68"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"069c3fb310e9336cf48cfdf8748a32c29fd0193d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.258"},{"fixed":"5.10.261"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.209"},{"fixed":"5.15.212"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.175"},{"fixed":"6.1.178"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.140"},{"fixed":"6.6.145"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.86"},{"fixed":"6.12.97"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.18.27"},{"fixed":"6.18.40"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7.0.4"},{"fixed":"7.1"}]}],"versions":["v5.10.260","v5.10.259","v5.10.258","v5.15.211","v5.15.210","v5.15.209","v6.1.177","v6.1.176","v6.1.175","v6.6.144","v6.6.143","v6.6.142","v6.6.141","v6.6.140","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.18.39","v6.18.38","v6.18.37","v6.18.36","v6.18.35","v6.18.34","v6.18.33","v6.18.32","v6.18.31","v6.18.30","v6.18.29","v6.18.28","v6.18.27","v7.0","v7.0.3","v7.0-rc1","v7.0.2","v7.0.1","v7.0-rc5","v7.0-rc6","v7.0-rc7","v7.0-rc3","v7.0-rc4","v6.19-rc2","v7.0-rc2","v6.19","v6.19-rc8","v6.19-rc1","v6.19-rc6","v6.19-rc7","v6.19-rc5","v6.19-rc4","v6.19-rc3","v6.18","v6.18-rc1","v6.18-rc7","v6.18-rc3","v6.18-rc5","v6.18-rc6","v6.18-rc2","v6.18-rc4","v6.17","v6.17-rc7","v6.17-rc1","v6.17-rc2","v6.17-rc6","v6.17-rc4","v6.17-rc5","v6.17-rc3","v6.16","v6.16-rc6","v6.16-rc1","v6.16-rc4","v6.16-rc2","v6.16-rc5","v6.16-rc7","v6.16-rc3","v6.14-rc3","v6.15"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