From: Sreekanth Reddy sreekanth.reddy@broadcom.com

mainline inclusion from mainline-v6.0-rc5 commit 991df3dd5144f2e6b1c38b8d20ed3d4d21e20b34 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9LKDT CVE: CVE-2022-48695

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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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

Conflicts: drivers/scsi/mpt3sas/mpt3sas_scsih.c [Commit 9e73ed2e4cf5 add fw_events_cleanup in _scsih_fw_event_cleanup_queue().] Signed-off-by: Li Lingfeng lilingfeng3@huawei.com --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index d3c944d99703..90e5fb48961a 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -3215,6 +3215,7 @@ 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);

@@ -3249,7 +3250,6 @@ _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); } }