{"id":"CVE-2024-50014","summary":"ext4: fix access to uninitialised lock in fc replay path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix access to uninitialised lock in fc replay path\n\nThe following kernel trace can be triggered with fstest generic/629 when\nexecuted against a filesystem with fast-commit feature enabled:\n\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nCPU: 0 PID: 866 Comm: mount Not tainted 6.10.0+ #11\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x66/0x90\n register_lock_class+0x759/0x7d0\n __lock_acquire+0x85/0x2630\n ? __find_get_block+0xb4/0x380\n lock_acquire+0xd1/0x2d0\n ? __ext4_journal_get_write_access+0xd5/0x160\n _raw_spin_lock+0x33/0x40\n ? __ext4_journal_get_write_access+0xd5/0x160\n __ext4_journal_get_write_access+0xd5/0x160\n ext4_reserve_inode_write+0x61/0xb0\n __ext4_mark_inode_dirty+0x79/0x270\n ? ext4_ext_replay_set_iblocks+0x2f8/0x450\n ext4_ext_replay_set_iblocks+0x330/0x450\n ext4_fc_replay+0x14c8/0x1540\n ? jread+0x88/0x2e0\n ? rcu_is_watching+0x11/0x40\n do_one_pass+0x447/0xd00\n jbd2_journal_recover+0x139/0x1b0\n jbd2_journal_load+0x96/0x390\n ext4_load_and_init_journal+0x253/0xd40\n ext4_fill_super+0x2cc6/0x3180\n...\n\nIn the replay path there's an attempt to lock sbi-\u003es_bdev_wb_lock in\nfunction ext4_check_bdev_write_error().  Unfortunately, at this point this\nspinlock has not been initialized yet.  Moving it's initialization to an\nearlier point in __ext4_fill_super() fixes this splat.","modified":"2026-04-02T12:21:12.818303Z","published":"2024-10-21T18:54:05.764Z","related":["SUSE-SU-2024:3983-1","SUSE-SU-2024:3985-1","SUSE-SU-2024:4314-1","SUSE-SU-2024:4316-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4364-1","SUSE-SU-2024:4387-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","USN-7276-1","USN-7277-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50014.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/23dfdb56581ad92a9967bcd720c8c23356af74c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e35f560daebe40264c95e9a1ab03110d4997df6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b002031d585a14eed511117dda8c6452a804d508"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d157fc20ca5239fd56965a5a8aa1a0e25919891a"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50014.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50014"},{"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":"01efe93a5aa20a19b390426718dc214898a7c2ec"},{"fixed":"6e35f560daebe40264c95e9a1ab03110d4997df6"},{"fixed":"d157fc20ca5239fd56965a5a8aa1a0e25919891a"},{"fixed":"b002031d585a14eed511117dda8c6452a804d508"},{"fixed":"23dfdb56581ad92a9967bcd720c8c23356af74c1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50014.json"}}],"schema_version":"1.7.5"}