From eaaea4681984c79d2b2b160387b297477f0c1aab Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Date: Thu, 11 Mar 2021 15:46:40 +0100
Subject: [PATCH] media: gspca/sq905.c: fix uninitialized variable
Git-commit: eaaea4681984c79d2b2b160387b297477f0c1aab
Patch-mainline: v5.13-rc1
References: git-fixes
act_len can be uninitialized if usb_bulk_msg() returns an error.
Set it to 0 to avoid a KMSAN error.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+a4e309017a5f3a24c7b3@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/usb/gspca/sq905.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/gspca/sq905.c b/drivers/media/usb/gspca/sq905.c
index 97799cfb832e..949111070971 100644
--- a/drivers/media/usb/gspca/sq905.c
+++ b/drivers/media/usb/gspca/sq905.c
@@ -158,7 +158,7 @@ static int
sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock)
{
int ret;
- int act_len;
+ int act_len = 0;
gspca_dev->usb_buf[0] = '\0';
if (need_lock)
--
2.26.2