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=11c3005d200000 start commit: 65766ee0 ALSA: oss: Use kvzalloc() for local buffer alloca.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=13c3005d200000 console output: https://syzkaller.appspot.com/x/log.txt?x=15c3005d200000 kernel config: https://syzkaller.appspot.com/x/.config?x=73e2bc0cb6463446 dashboard link: https://syzkaller.appspot.com/bug?extid=d4503ae45b65c5bc1194 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1789354d400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162ebe2b400000
Reported-by: syzbot+d4503ae45b65c5bc1194@syzkaller.appspotmail.com Fixes: 65766ee0 ("ALSA: oss: Use kvzalloc() for local buffer allocations")