On Tue, Mar 9, 2021 at 12:38 PM Takashi Iwai <tiwai@xxxxxxx> wrote: > > On Tue, 09 Mar 2021 12:32:18 +0100, > syzbot wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 4641b323 Add linux-next specific files for 20210305 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=103252ead00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=b87b6a083d302a90 > > dashboard link: https://syzkaller.appspot.com/bug?extid=ffad4c74b3b3ea3aa9c3 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1122d35cd00000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f6476cd00000 > > > > The issue was bisected to: > > > > commit 9799110825dba087c2bdce886977cf84dada2005 > > Author: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> > > Date: Thu Mar 4 04:34:16 2021 +0000 > > > > ALSA: usb-audio: Disable USB autosuspend properly in setup_disable_autosuspend() > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=166d91ead00000 > > final oops: https://syzkaller.appspot.com/x/report.txt?x=156d91ead00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=116d91ead00000 > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+ffad4c74b3b3ea3aa9c3@xxxxxxxxxxxxxxxxxxxxxxxxx > > Fixes: 9799110825db ("ALSA: usb-audio: Disable USB autosuspend properly in setup_disable_autosuspend()") > > > > usb 1-1: USB disconnect, device number 2 > > ================================================================== > > BUG: KASAN: use-after-free in usb_audio_disconnect+0x750/0x800 sound/usb/card.c:918 > > This must be fixed by the commit that was already merged to sound.git > tree today: > c5aa956eaeb0 ("ALSA: usb-audio: fix use after free in usb_audio_disconnect") #syz fix: ALSA: usb-audio: fix use after free in usb_audio_disconnect
