Am Montag, den 13.01.2020, 04:24 -0800 schrieb syzbot: > Hello, > > syzbot found the following crash on: > > HEAD commit: ae179410 usb: gadget: add raw-gadget interface > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=132223fee00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ad1d751a3a72ae57 > dashboard link: https://syzkaller.appspot.com/bug?extid=9a48339b077c5a80b869 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16857325e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142e069ee00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+9a48339b077c5a80b869@xxxxxxxxxxxxxxxxxxxxxxxxx > > usb 1-1: New USB device found, idVendor=0bd3, idProduct=0555, > bcdDevice=69.6a > usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 > usb 1-1: config 0 descriptor?? > usb 1-1: string descriptor 0 read error: -71 > uvcvideo: Found UVC 0.00 device <unnamed> (0bd3:0555) > ================================================================== > BUG: KASAN: use-after-free in uvc_register_terms > drivers/media/usb/uvc/uvc_driver.c:2038 [inline] > BUG: KASAN: use-after-free in uvc_register_chains > drivers/media/usb/uvc/uvc_driver.c:2070 [inline] > BUG: KASAN: use-after-free in uvc_probe.cold+0x2193/0x29de > drivers/media/usb/uvc/uvc_driver.c:2201 > Read of size 2 at addr ffff8881d4f1bc2e by task kworker/1:2/94 #syz test: https://github.com/google/kasan.git ae179410 >From db844641a5e30f3cfc0ce9cde156b3cc356b6c0c Mon Sep 17 00:00:00 2001 From: Oliver Neukum <oneukum@xxxxxxxx> Date: Mon, 10 Feb 2020 15:10:36 +0100 Subject: [PATCH] UVC: deal with unnamed streams The pointer can be NULL Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx> --- drivers/media/usb/uvc/uvc_driver.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 99883550375e..26558a89f2fe 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -2069,7 +2069,8 @@ static int uvc_register_terms(struct uvc_device *dev, stream = uvc_stream_by_id(dev, term->id); if (stream == NULL) { uvc_printk(KERN_INFO, "No streaming interface found " - "for terminal %u.", term->id); + "for terminal %u.", + term->id ? term->id : "(Unnamed)"); continue; } -- 2.16.4
