linux-kernel - Re: [syzbot] [media?] WARNING in uvc_status

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Message-Id: <20241020080658.2124-1-hdanton@sina.com>
Date: Sun, 20 Oct 2024 16:06:58 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+9446d5e0d25571e6a212@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [media?] WARNING in uvc_status_unregister

On Sat, 19 Oct 2024 23:44:28 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    15e7d45e786a Add linux-next specific files for 20241016
> git tree:       linux-next
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10560240580000

#syz test

--- x/drivers/media/usb/uvc/uvc_status.c
+++ y/drivers/media/usb/uvc/uvc_status.c
@@ -372,6 +372,8 @@ int uvc_status_resume(struct uvc_device
 
 void uvc_status_suspend(struct uvc_device *dev)
 {
+	if (!dev->int_urb)
+		return;
 	guard(mutex)(&dev->status_lock);
 
 	if (dev->status_users)
--