In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info

The MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and the
routine unconditionally frees submitted mailbox commands regardless of
return status.  The issue is that for MBX_TIMEOUT cases, when firmware
returns SFP information at a later time, that same mailbox memory region
references previously freed memory in its cmpl routine.

Fix by adding checks for the MBX_TIMEOUT return code.  During mailbox
resource cleanup, check the mbox flag to make sure that the wait did not
timeout.  If the MBOX_WAKE flag is not set, then do not free the resources
because it will be freed when firmware completes the mailbox at a later
time in its cmpl routine.

Also, increase the timeout from 30 to 60 seconds to accommodate boot
scripts requiring longer timeouts.

kernel.org https://git.kernel.org/stable/c/bba47fe3b038cca3d3ebd799665ce69d6d273b58 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ede596b1434b57c0b3fd5c02b326efe5c54f6e48 [No types assigned]