linux-kernel - [PATCH next] scsi: scsi_debug: Fix missing error code in scsi_debug

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Date:   Thu,  6 Apr 2023 00:46:07 -0700
From:   Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     error27@...il.com, kernel-janitors@...r.kernel.org,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        John Garry <john.g.garry@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH next] scsi: scsi_debug: Fix missing error code in scsi_debug_init()

Smatch reports: drivers/scsi/scsi_debug.c:6996
	scsi_debug_init() warn: missing error code 'ret'

Although it is unlikely that KMEM_CACHE might fail, but if
it does then ret might be zero. So to fix this explicitly
mark ret as "-ENOMEM" and then goto driver_unreg.

Fixes: 1107c7b24ee3 ("scsi: scsi_debug: Dynamically allocate sdebug_queued_cmd")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is from static analysis, Only compile tested.
---
 drivers/scsi/scsi_debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index cf3f58e8f733..f4fa1035a191 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -6992,8 +6992,10 @@ static int __init scsi_debug_init(void)
 	sdebug_add_host = 0;
 
 	queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
-	if (!queued_cmd_cache)
+	if (!queued_cmd_cache) {
+		ret = -ENOMEM;
 		goto driver_unreg;
+	}
 
 	for (k = 0; k < hosts_to_add; k++) {
 		if (want_store && k == 0) {
-- 
2.38.1