Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: zram: set default primary compressor in zram_destroy_comps() Patch series "zram: fix zram issues reported by sashiko". Sashiko drove by and reported [1] a couple of zram issues: a possible BUG_ON() in zlib code due to missing winbits range validation and one possible NULL-ptr dereference in zcomp. Both are low risk yet still worth fixing. This patch (of 2): zram_destroy_comps() resets all compressors and leaves them set to NULL, including the primary one, which is invalid device state, as now comp_algorithm_show()->strcmp() can be called on a NULL compressor. Set default primary compressor in zram_destroy_comps().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6e20720b12299595154857fa98222729f0d5823c before a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5; affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 before 4bf3328eeec9afc2a55632ff47fc18101ea62d73; affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 before 5cec3e60e9f2d1324179df3aa91656f90095cf8f; affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 before dea8f13c3dfad8b990f8ea96c997aabeebbc1d22; affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 before dde75313eed0b014c437f48dd75c0308b592cbf9; affected c4e5683c3031a33dc46954e99d37cbd2f706cdb6; affected 6.6.57 before 6.6.160; affected 6.11.4 before 6.12 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5
- https://git.kernel.org/stable/c/4bf3328eeec9afc2a55632ff47fc18101ea62d73
- https://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f
- https://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22
- https://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9