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scsi: mpt3sas: Fix use-after-free warning

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commit 991df3dd5144f2e6b1c38b8d20ed3d4d21e20b34 upstream.

Fix the following use-after-free warning which is observed during
controller reset:

refcount_t: underflow; use-after-free.
WARNING: CPU: 23 PID: 5399 at lib/refcount.c:28 refcount_warn_saturate+0xa6/0xf0

Link: https://lore.kernel.org/r/20220906134908.1039-2-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sreekanth Reddy 2022-09-06 19:19:08 +05:30 committed by Greg Kroah-Hartman
parent 8d66989b5f
commit 5682c94644
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/mpt3sas/mpt3sas_scsih.c
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@ -3238,6 +3238,7 @@ static struct fw_event_work *dequeue_next_fw_event(struct MPT3SAS_ADAPTER *ioc)
fw_event = list_first_entry(&ioc->fw_event_list,
struct fw_event_work, list);
list_del_init(&fw_event->list);
fw_event_work_put(fw_event);
}
spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
@ -3272,7 +3273,6 @@ _scsih_fw_event_cleanup_queue(struct MPT3SAS_ADAPTER *ioc)
if (cancel_work_sync(&fw_event->work))
fw_event_work_put(fw_event);
fw_event_work_put(fw_event);
}
}