CVE-2024-46842: scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
First published: Fri Sep 27 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.10.10 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.119-1 | 6.11.10-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/bba47fe3b038cca3d3ebd799665ce69d6d273b58
- https://git.kernel.org/stable/c/ede596b1434b57c0b3fd5c02b326efe5c54f6e48
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46842
- https://nvd.nist.gov/vuln/detail/CVE-2024-46842
- https://launchpad.net/bugs/cve/CVE-2024-46842
- https://security-tracker.debian.org/tracker/CVE-2024-46842
- https://ubuntu.com/security/CVE-2024-46842
- https://git.kernel.org/linus/ede596b1434b57c0b3fd5c02b326efe5c54f6e48
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