CVE-2024-46842

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.