syzbot has bisected this bug to:
commit 428490e38b2e352812e0b765d8bceafab0ec441d
Author: Jason A. Donenfeld <Jason@xxxxxxxxx>
Date: Wed Sep 20 14:58:39 2017 +0000
security/keys: rewrite all of big_key crypto
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=160eabcf200000
start commit: 428490e3 security/keys: rewrite all of big_key crypto
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=150eabcf200000
console output: https://syzkaller.appspot.com/x/log.txt?x=110eabcf200000
kernel config: https://syzkaller.appspot.com/x/.config?x=9384ecb1c973baed
dashboard link: https://syzkaller.appspot.com/bug?extid=e736399a2c4054612307
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17902f5b400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111377e5400000
Reported-by: syzbot+e736399a2c4054612307@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 428490e38b2e ("security/keys: rewrite all of big_key crypto")
