Description
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid double completion in async IOCB timeout qla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When qla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the SRB_CTRL_VP/default path scan outstanding_cmds[] for the SRB and then call sp->done(sp, QLA_FUNCTION_TIMEOUT) unconditionally, without checking whether the SRB was actually found and removed. If the response ISR completes the same handle first, it removes the SRB under qp_lock_ptr and runs sp->done() -> complete(sp->comp). The submitter qla24xx_control_vp() wakes from wait_for_completion(), clears sp->comp, drops its reference and returns, reclaiming the on-stack completion. The timer reference keeps the SRB alive across the timeout handler, but not the submitter's stack. The timeout then issues a second sp->done() -> qla_ctrlvp_sp_done(), which evaluates "if (sp->comp) complete(sp->comp)"; with the pointer loaded before the submitter's NULL store, complete() writes into the freed stack frame, a use-after-free. Track whether this path removed the SRB from outstanding_cmds and only call sp->done() when it did, so the command is completed exactly once by whichever path owns it. This mirrors the sp_found guard already used in qla24xx_abort_iocb_timeout().
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
f6145e86d21fccd59bbb87bc1e1eb076658fd79a to < 71a7b6e3c7f121439f51a058e53d4a8e05b63decaffectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < 7257b5e1fb6c9387714f66e01b79ec82b717eedeaffectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < f5b660e0b0d9190d8853c795c2522cc5f8c93003affectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < 6e217a9482eabbd8b29847be334c74cf468d3544affectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < d6d856c722f40f0694ff755208552e658db6dd42affectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < 9fa1d71233a82416492d9c9de9756ebe140fe714affectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < 845d4abd92cd2f97551356c8b281ad6e197acb07affectedf6145e86d21fccd59bbb87bc1e1eb076658fd79a to < bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8affected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.51 to ≤ 6.18.*unaffected7.2.5 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec ↗
- https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede ↗
- https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003 ↗
- https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544 ↗
- https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42 ↗
- https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714 ↗
- https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07 ↗
- https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8 ↗