Description
In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
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
5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a to < 1425f1bb5df5239021fd09ebc2a5e8070e705d36affected094f3d9314d67691cb21ba091c1b528f6e3c4893 to < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205faffectedb22fd72bfebda3956efc4431b60ddfc0a51e03e0 to < cfe5b38c37720313eff0dec5517442c7ab3c9a20affected761564d93c8265f65543acf0a576b32d66bfa26a to < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678affected64dc8c732f5c2b406cc752e6aaa1bd5471159cab to < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02affected
Linux Linux
Default version status: unaffected
5.15.86 to < 5.15.87affected6.0.16 to < 6.0.17affected6.1.2 to < 6.1.3affected
References
- https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36 ↗
- https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f ↗
- https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20 ↗
- https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 ↗
- https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 ↗