Description
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < 7af5d66d0514b8f1d759d0e32b9d4c5d26263e4aaffected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < 71065f3d6864a101b77e7af84566757c4df415a0affected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < cc688475c56d34a2b584141f9544cbe23360080daffected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < c08a54df9d33dcd6ff089adc9434b2c008af3a39affected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < 0d1525fdcd3355672b7485d61e55df6824ab5ad1affected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < c875407c34dadaef0599834ad9c815f4c9f50d15affected61b4de4e0b384f4a22c55c3bada604da49cec4e1 to < 44081d708b5b885487bac792db78324b7b4c267daffected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected5.15.224 to ≤ 5.15.*unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7af5d66d0514b8f1d759d0e32b9d4c5d26263e4a ↗
- https://git.kernel.org/stable/c/71065f3d6864a101b77e7af84566757c4df415a0 ↗
- https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d ↗
- https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39 ↗
- https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1 ↗
- https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15 ↗
- https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d ↗