syzbot <syzbot+7a1cff37dbbef9e7b...@syzkaller.appspotmail.com> writes:
> Hello, > > syzbot hit the following crash on upstream commit > 9dd2326890d89a5179967c947dab2bab34d7ddee (Fri Mar 30 17:29:47 2018 +0000) > Merge tag 'ceph-for-4.16-rc8' of git://github.com/ceph/ceph-client > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=7a1cff37dbbef9e7ba4c > > So far this crash happened 4 times on upstream. > > Unfortunately, I don't have any reproducer for this crash yet. Do you have any of the other traces? This looks like a something is calling put_pid_ns more than it is calling get_pid_ns causing a reference count mismatch. If this is not: 9ee332d99e4d5a97548943b81c54668450ce641b I could use a few more hints to help narrow down what is going wrong. It would be nice to know what the other 3 crashes looked like and exactly which upstream they were on. Eric
