From 0a045eac8d0427b64577a24d74bb8347c905ac65 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin <paskripkin@gmail.com>
Date: Mon, 17 May 2021 21:18:14 +0200
Subject: [PATCH] media: zr364xx: fix memory leak in zr364xx_start_readpipe
Git-commit: 0a045eac8d0427b64577a24d74bb8347c905ac65
Patch-mainline: v5.14-rc1
References: git-fixes
syzbot reported memory leak in zr364xx driver.
The problem was in non-freed urb in case of
usb_submit_urb() fail.
Backtrace: [<ffffffff82baedf6>] kmalloc include/linux/slab.h:561 [inline] [<ffffffff82baedf6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74 [<ffffffff82f7cce8>] zr364xx_start_readpipe+0x78/0x130 drivers/media/usb/zr364xx/zr364xx.c:1022 [<ffffffff84251dfc>] zr364xx_board_init drivers/media/usb/zr364xx/zr364xx.c:1383 [inline] [<ffffffff84251dfc>] zr364xx_probe+0x6a3/0x851 drivers/media/usb/zr364xx/zr364xx.c:1516 [<ffffffff82bb6507>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff826018a9>] really_probe+0x159/0x500 drivers/base/dd.c:576
Fixes: ccbf035ae5de ("V4L/DVB (12278): zr364xx: implement V4L2_CAP_STREAMING")
Cc: stable@vger.kernel.org
Reported-by: syzbot+af4fa391ef18efdd5f69@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/usb/zr364xx/zr364xx.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/media/usb/zr364xx/zr364xx.c b/drivers/media/usb/zr364xx/zr364xx.c
index 1ef611e08323..538a330046ec 100644
--- a/drivers/media/usb/zr364xx/zr364xx.c
+++ b/drivers/media/usb/zr364xx/zr364xx.c
@@ -1032,6 +1032,7 @@ static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
DBG("submitting URB %p\n", pipe_info->stream_urb);
retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
if (retval) {
+ usb_free_urb(pipe_info->stream_urb);
printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
return retval;
}
--
2.26.2