CVE-2023-52804
fs/jfs: Add validity check for db_maxag and db_agpref
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Description
In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Add validity check for db_maxag and db_agpref Both db_maxag and db_agpref are used as the index of the db_agfree array, but there is currently no validity check for db_maxag and db_agpref, which can lead to errors. The following is related bug reported by Syzbot: UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20 index 7936 is out of range for type 'atomic_t[128]' Add checking that the values of db_maxag and db_agpref are valid indexes for the db_agfree array.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/1f74d336990f37703a8eee77153463d65b67f70e
- https://git.kernel.org/stable/c/2323de34a3ae61a9f9b544c18583f71cea86721f
- https://git.kernel.org/stable/c/32bd8f1cbcf8b663e29dd1f908ba3a129541a11b
- https://git.kernel.org/stable/c/5013f8269887642cca784adc8db9b5f0b771533f
- https://git.kernel.org/stable/c/64933ab7b04881c6c18b21ff206c12278341c72e
References (9)
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