High · published May 21, 2024
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | < 4.14.331 | 4.14.331 |
| linux/linux_kernel | ≥ 4.15, < 4.19.300 | 4.19.300 |
| linux/linux_kernel | ≥ 4.20, < 5.4.262 | 5.4.262 |
| linux/linux_kernel | ≥ 5.5, < 5.10.202 | 5.10.202 |
| linux/linux_kernel | ≥ 5.11, < 5.15.140 | 5.15.140 |
| linux/linux_kernel | ≥ 5.16, < 6.1.64 | 6.1.64 |
| linux/linux_kernel | ≥ 6.2, < 6.5.13 | 6.5.13 |
| linux/linux_kernel | ≥ 6.6, < 6.6.3 | 6.6.3 |