Description
In the Linux kernel, the following vulnerability has been resolved: qed: fix double free in qed_cxt_tables_alloc() If one of the later PF or VF CID bitmap allocations fails, qed_cid_map_alloc() jumps to cid_map_fail and frees the previously allocated CID bitmaps before returning an error. qed_cxt_tables_alloc() then calls qed_cxt_mngr_free(), which invokes qed_cid_map_free() again. Fix this by setting each CID bitmap pointer to NULL after bitmap_free() to avoid double free. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3. Runtime reproduction was not attempted because exercising the failing allocation path requires device-specific setup.
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
fe56b9e6a8d957d6a20729d626027f800c17a2da to < 9fe030719bd083b766602692ee96c8c985798e3caffectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < 06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227affectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < 8cf5e4d2ca6b101d163c7423a426fb0aec34f7bbaffectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < 3904b993cc17ec5d7c5d3b57dbd0b775dafb9684affectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < bdf678a273cadbccc347f331ae2e93ff4d14834caffectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < 0e47fc1c9181ae029e0e35a865cbf2adcbae626caffectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < a04c207f0801abdd23a169b5f902a9845059a65aaffectedfe56b9e6a8d957d6a20729d626027f800c17a2da to < 2bccfb8476ca5f3548afbd623dc7a6980d4e77deaffected
Linux Linux
Default version status: affected
4.4affected0 to < 4.4unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.142 to ≤ 6.6.*unaffected6.12.92 to ≤ 6.12.*unaffected6.18.34 to ≤ 6.18.*unaffected7.0.11 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c ↗
- https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227 ↗
- https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb ↗
- https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684 ↗
- https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c ↗
- https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c ↗
- https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a ↗
- https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de ↗