CVE-2024-36966 (GCVE-0-2024-36966)

Vulnerability from cvelistv5 – Published: 2024-06-08 12:52 – Updated: 2025-05-04 09:12
VLAI?
Title
erofs: reliably distinguish block based and fscache mode
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < f9b877a7ee312ec8ce17598a7ef85cb820d7c371 (git)
Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < dcdd49701e429c55b3644fd70fc58d85745f8cfe (git)
Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < 7af2ae1b1531feab5d38ec9c8f472dc6cceb4606 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.32 , ≤ 6.6.* (semver)
Unaffected: 6.8.11 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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