CVE-2024-46842 Information

Description

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.

Reference

https://git.kernel.org/stable/c/bba47fe3b038cca3d3ebd799665ce69d6d273b58 https://git.kernel.org/stable/c/ede596b1434b57c0b3fd5c02b326efe5c54f6e48