scsi: mpi3mr: Fix potential deadlock in mpi3mr_fault_uevent_emit

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mpi3mr_fault_uevent_emit() runs from the fault watchdog and reset paths
where host I/O may already be blocked. GFP_KERNEL allocations here, both
the local kzalloc_obj() and the ones inside kobject_uevent_env() itself,
can trigger reclaim that waits on that blocked I/O and deadlock.

Use memalloc_noio_save()/restore() to cover the whole call instead of
just the local allocation.

Fixes: ec54b348f2 ("scsi: mpi3mr: Record and report controller firmware faults")
Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260724164630.924288-1-chandrakanth.patil%40broadcom.com
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Link: https://patch.msgid.link/20260724175231.935192-1-chandrakanth.patil@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Chandrakanth Patil 2026-07-24 23:22:31 +05:30 • committed by Martin K. Petersen

parent a8ddfd2425

commit ccff8c9257

1 changed files with 7 additions and 2 deletions

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drivers/scsi/mpi3mr/mpi3mr_fw.c

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