Am Montag, den 29.07.2019, 09:38 -0700 schrieb syzbot: > Hello, > > syzbot found the following crash on: > > HEAD commit: 7f7867ff usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=1503f4ec600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=792eb47789f57810 > dashboard link: https://syzkaller.appspot.com/bug?extid=199ea16c7f26418b4365 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=173e4442600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115482b2600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+199ea16c7f26418b4365@xxxxxxxxxxxxxxxxxxxxxxxxx #syz test: https://github.com/google/kasan.git usb-fuzzer >From 29b755588bd353d0e10ae384c2c551dffa1b3e7b Mon Sep 17 00:00:00 2001 From: Oliver Neukum <oneukum@xxxxxxxx> Date: Tue, 30 Jul 2019 12:00:27 +0200 Subject: [PATCH] usbtouchscreen: add proper initialization Mutexes shall be initialized before they are used. Fixes: 12e510dbc57b2 ("Input: usbtouchscreen - fix deadlock in autosuspend") Reported-by: syzbot+199ea16c7f26418b4365@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx> --- drivers/input/touchscreen/usbtouchscreen.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index a2cec6cacf57..caacf211f51b 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -1658,6 +1658,7 @@ static int usbtouch_probe(struct usb_interface *intf, input_dev = input_allocate_device(); if (!usbtouch || !input_dev) goto out_free; + mutex_init(&usbtouch->pm_mutex); type = &usbtouch_dev_info[id->driver_info]; usbtouch->type = type; -- 2.16.4
