CVE-2024-36966 (GCVE-0-2024-36966)
Vulnerability from cvelistv5
Published
2024-06-08 12:52
Modified
2025-05-04 09:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: reliably distinguish block based and fscache mode When erofs_kill_sb() is called in block dev based mode, s_bdev may not have been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled, it will be mistaken for fscache mode, and then attempt to free an anon_dev that has never been allocated, triggering the following warning: ============================================ ida_free called for id=0 which is not allocated. WARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140 Modules linked in: CPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630 RIP: 0010:ida_free+0x134/0x140 Call Trace: <TASK> erofs_kill_sb+0x81/0x90 deactivate_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ============================================ Now when erofs_kill_sb() is called, erofs_sb_info must have been initialised, so use sbi->fsid to distinguish between the two modes.
References
Impacted products
Vendor Product Version
Linux Linux Version: aca740cecbe57b12bd9c1fc632092af5ebacda0c
Version: aca740cecbe57b12bd9c1fc632092af5ebacda0c
Version: aca740cecbe57b12bd9c1fc632092af5ebacda0c
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