[SRU][F][PATCH v2 0/1] CVE-2024-36952
Massimiliano Pellizzer
massimiliano.pellizzer at canonical.com
Thu Nov 7 07:30:31 UTC 2024
[Impact]
scsi: lpfc: Move NPIV's transport unregistration to after resource clean up
There are cases after NPIV deletion where the fabric switch still believes
the NPIV is logged into the fabric. This occurs when a vport is
unregistered before the Remove All DA_ID CT and LOGO ELS are sent to the
fabric.
Currently fc_remove_host(), which calls dev_loss_tmo for all D_IDs including
the fabric D_ID, removes the last ndlp reference and frees the ndlp rport
object. This sometimes causes the race condition where the final DA_ID and
LOGO are skipped from being sent to the fabric switch.
Fix by moving the fc_remove_host() and scsi_remove_host() calls after DA_ID
and LOGO are sent.
[Fix]
Noble: Fixed through stable updates (eab2dce13aebd)
Jammy: Fixed
Focal: Backported from linux-5.15.y
Bionic: Sent to ESM ML
Xenial: Sent to ESM ML
[Test Case]
Compile tested only.
[Where problems could occur]
The fix affectrs the driver/scsi/lpfc subsystem. A bug in the patch
could introduce issues during virtual port removal, leading to leftover
references in the subsystem. Users might see kernel warnings, experience
crashes, olr notice delays and disconnections in storage access,
particularly under heavy SAN workloads.
[Changes between v1 and v2]
Backported only the changes strictly necessary to fix the CVE
Justin Tee (1):
scsi: lpfc: Move NPIV's transport unregistration to after resource
clean up
drivers/scsi/lpfc/lpfc_vport.c | 28 +++-------------------------
1 file changed, 3 insertions(+), 25 deletions(-)
--
2.43.0
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