linux-kernel - [PATCH v2] media: sq905.c: fix uninitialized variable

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Date:   Fri, 26 Mar 2021 23:02:52 +0200
From:   Alaa Emad <alaaemadhossney.ae@...il.com>
To:     hverkuil@...all.nl
Cc:     gregkh@...uxfoundation.org, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller@...glegroups.com,
        Alaa Emad <alaaemadhossney.ae@...il.com>,
        syzbot+a4e309017a5f3a24c7b3@...kaller.appspotmail.com
Subject: [PATCH v2] media: sq905.c: fix uninitialized variable

Reported-by: syzbot+a4e309017a5f3a24c7b3@...kaller.appspotmail.com
Signed-off-by: Alaa Emad <alaaemadhossney.ae@...il.com>

---
Changes in v2:
  - Fix the error occured because of pervious fix.
---
 drivers/media/usb/gspca/sq905.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/gspca/sq905.c b/drivers/media/usb/gspca/sq905.c
index 97799cfb832e..57206dd2e1a0 100644
--- a/drivers/media/usb/gspca/sq905.c
+++ b/drivers/media/usb/gspca/sq905.c
@@ -157,8 +157,8 @@ static int sq905_ack_frame(struct gspca_dev *gspca_dev)
 static int
 sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock)
 {
-	int ret;
-	int act_len;
+	int ret;
+	int act_len;
 
 	gspca_dev->usb_buf[0] = '\0';
 	if (need_lock)
@@ -180,8 +180,8 @@ sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock)
 			   data, size, &act_len, SQ905_DATA_TIMEOUT);
 
 	/* successful, it returns 0, otherwise  negative */
-	if (ret < 0 || act_len != size) {
-		pr_err("bulk read fail (%d) len %d/%d\n", ret, act_len, size);
+	if (ret < 0 || act_len != size) {
+	       pr_err("bulk read fail (%d) len %d/%d\n", ret, ret < 0 ? -1 : act_len, size);
 		return -EIO;
 	}
 	return 0;
-- 
2.25.1