From: Danila Chernetsov <listdansp@mail.ru>
Date: Fri, 17 Mar 2023 17:51:09 +0000 (+0000)
Subject: scsi: megaraid: Fix mega_cmd_done() CMDID_INT_CMDS
X-Git-Tag: v6.2.15~347
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d22984c830df81eeadd5e796a2c8c0bbc4159c77;p=thirdparty%2Fkernel%2Fstable.git

scsi: megaraid: Fix mega_cmd_done() CMDID_INT_CMDS

[ Upstream commit 75cb113cd43f06aaf4f1bda0069cfd5b98e909eb ]

When cmdid == CMDID_INT_CMDS, the 'cmds' pointer is NULL but is
dereferenced below.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 0f2bb84d2a68 ("[SCSI] megaraid: simplify internal command handling")
Signed-off-by: Danila Chernetsov <listdansp@mail.ru>
Link: https://lore.kernel.org/r/20230317175109.18585-1-listdansp@mail.ru
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index bf491af9f0d65..16e2cf848c6ef 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -1441,6 +1441,7 @@ mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
 		 */
 		if (cmdid == CMDID_INT_CMDS) {
 			scb = &adapter->int_scb;
+			cmd = scb->cmd;
 
 			list_del_init(&scb->list);
 			scb->state = SCB_FREE;