syzbot has bisected this bug to:
commit 65766ee0bf7fe8b3be80e2e1c3ef54ad59b29476 Author: Takashi Iwai tiwai@suse.de Date: Fri Nov 9 10:59:45 2018 +0000
ALSA: oss: Use kvzalloc() for local buffer allocations
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11b70c2b200000 start commit: 65766ee0 ALSA: oss: Use kvzalloc() for local buffer alloca.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=13b70c2b200000 console output: https://syzkaller.appspot.com/x/log.txt?x=15b70c2b200000 kernel config: https://syzkaller.appspot.com/x/.config?x=7e1aaa1cfbfe1abf dashboard link: https://syzkaller.appspot.com/bug?extid=a39b5d3c50e55e24fb4d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=113945fb200000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ed3cf7200000
Reported-by: syzbot+a39b5d3c50e55e24fb4d@syzkaller.appspotmail.com Fixes: 65766ee0 ("ALSA: oss: Use kvzalloc() for local buffer allocations")