From 8dd10296be8562a45c6c6794dd492a2b7dccede8 Mon Sep 17 00:00:00 2001 From: Yihang Li Date: Thu, 14 Dec 2023 11:45:14 +0800 Subject: scsi: hisi_sas: Check before using pointer variables In commit 4b329abc9180 ("scsi: hisi_sas: Move slot variable definition in hisi_sas_abort_task()"), we move the variables slot to the function head. However, the variable slot may be NULL, we should check it in each branch. Fixes: 4b329abc9180 ("scsi: hisi_sas: Move slot variable definition in hisi_sas_abort_task()") Signed-off-by: Yihang Li Signed-off-by: Xiang Chen Link: https://lore.kernel.org/r/1702525516-51258-4-git-send-email-chenxiang66@hisilicon.com Signed-off-by: Martin K. Petersen --- drivers/scsi/hisi_sas/hisi_sas_main.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 16017064e96a..bbb7b2d9ffcf 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -1641,7 +1641,10 @@ static int hisi_sas_abort_task(struct sas_task *task) task->task_state_flags |= SAS_TASK_STATE_ABORTED; spin_unlock_irqrestore(&task->task_state_lock, flags); - if (slot && task->task_proto & SAS_PROTOCOL_SSP) { + if (!slot) + goto out; + + if (task->task_proto & SAS_PROTOCOL_SSP) { u16 tag = slot->idx; int rc2; @@ -1688,7 +1691,7 @@ static int hisi_sas_abort_task(struct sas_task *task) rc = hisi_sas_softreset_ata_disk(device); } } - } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) { + } else if (task->task_proto & SAS_PROTOCOL_SMP) { /* SMP */ u32 tag = slot->idx; struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; -- cgit