syzbot has bisected this bug to:
commit a32e236eb93e62a0f692e79b7c3c9636689559b9
Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Fri Aug 3 19:22:09 2018 +0000
Partially revert "block: fail op_is_write() requests to read-only
partitions"
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=119503d2e00000
start commit: 60f5a217 Merge tag 'usercopy-fix-v4.18-rc8' of git://git.k..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=139503d2e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=159503d2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2dc0cd7c2eefb46f
dashboard link: https://syzkaller.appspot.com/bug?extid=21cfe1f803e0e158acf1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b87bfc400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117ccc8c400000
Reported-by: syzbot+21cfe1f803e0e158acf1@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a32e236eb93e ("Partially revert "block: fail op_is_write() requests
to read-only partitions"")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
