CVE-2022-48791 Information

Description

In the Linux kernel the following vulnerability has been resolved:

scsi: pm8001: Fix use-after-free for aborted TMF sas_task

Currently a use-after-free may occur if a TMF sas_task is aborted before we handle the IO completion in mpi_ssp_completion(). The abort occurs due to timeout.

When the timeout occurs the SAS_TASK_STATE_ABORTED flag is set and the sas_task is freed in pm8001_exec_internal_tmf_task().

However if the I/O completion occurs later the I/O completion still thinks that the sas_task is available. Fix this by clearing the ccb->task if the TMF times out - the I/O completion handler does nothing if this pointer is cleared.

Reference

https://git.kernel.org/stable/c/d872e7b5fe38f325f5206b6872746fa02c2b4819 https://git.kernel.org/stable/c/3c334cdfd94945b8edb94022a0371a8665b17366 https://git.kernel.org/stable/c/510b21442c3a2e3ecc071ba3e666b320e7acdd61 https://git.kernel.org/stable/c/61f162aa4381845acbdc7f2be4dfb694d027c018