{"id":"CVE-2024-36966","summary":"erofs: reliably distinguish block based and fscache mode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: reliably distinguish block based and fscache mode\n\nWhen erofs_kill_sb() is called in block dev based mode, s_bdev may not\nhave been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled,\nit will be mistaken for fscache mode, and then attempt to free an anon_dev\nthat has never been allocated, triggering the following warning:\n\n============================================\nida_free called for id=0 which is not allocated.\nWARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140\nModules linked in:\nCPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630\nRIP: 0010:ida_free+0x134/0x140\nCall Trace:\n \u003cTASK\u003e\n erofs_kill_sb+0x81/0x90\n deactivate_locked_super+0x35/0x80\n get_tree_bdev+0x136/0x1e0\n vfs_get_tree+0x2c/0xf0\n do_new_mount+0x190/0x2f0\n [...]\n============================================\n\nNow when erofs_kill_sb() is called, erofs_sb_info must have been\ninitialised, so use sbi-\u003efsid to distinguish between the two modes.","modified":"2026-04-02T12:16:35.421076Z","published":"2024-06-08T12:52:59.148Z","related":["MGASA-2024-0263","MGASA-2024-0266"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36966.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36966.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36966"},{"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":"aca740cecbe57b12bd9c1fc632092af5ebacda0c"},{"fixed":"f9b877a7ee312ec8ce17598a7ef85cb820d7c371"},{"fixed":"dcdd49701e429c55b3644fd70fc58d85745f8cfe"},{"fixed":"7af2ae1b1531feab5d38ec9c8f472dc6cceb4606"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-36966.json"}}],"schema_version":"1.7.5"}