On Mon 06-08-18 23:41:22, Tetsuo Handa wrote: > +David Howells > > On 2018/08/06 20:32, Michal Hocko wrote: > > On Mon 06-08-18 04:27:02, syzbot wrote: > >> Hello, > >> > >> syzbot has tested the proposed patch and the reproducer did not trigger > >> crash: > >> > >> Reported-and-tested-by: > >> syzbot+bab151e82a4e973fa325@xxxxxxxxxxxxxxxxxxxxxxxxx > >> > >> Tested on: > >> > >> commit: 8c8399e0a3fb Add linux-next specific files for 20180806 > >> git tree: linux-next > >> kernel config: https://syzkaller.appspot.com/x/.config?x=1b6bc1781e49e93e > >> compiler: gcc (GCC) 8.0.1 20180413 (experimental) > >> patch: https://syzkaller.appspot.com/x/patch.diff?x=14fe18e2400000 > >> > >> Note: testing is done by a robot and is best-effort only. > > > > OK, so this smells like a problem in the previous group oom changes. Or > > maybe it is not very easy to reproduce? > > > > Since I can't find mm related changes between next-20180803 (syzbot can reproduce) and > next-20180806 (syzbot has not reproduced), I can't guess what makes this problem go away. Hmm, but original report was against 4.18.0-rc6-next-20180725+ kernel. And that one had the old group oom code. /me confused. -- Michal Hocko SUSE Labs
