CVE-2022-48791

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.