syzbot


WARNING: bad unlock balance in mptcp_poll
Status: fixed on 2020/06/18 13:57
Reported-by: syzbot+e56606435b7bfeea8cf5@syzkaller.appspotmail.com
Fix commit: e154659ba39a mptcp: fix double-unlock in mptcp_poll
First crash: 608d, last: 603d

Cause bisection: introduced by (bisect log) :
commit 59832e246515ab6a4f5aa878073e6f415aa35166
Author: Florian Westphal <fw@strlen.de>
Date: Thu Apr 2 11:44:52 2020 +0000

  mptcp: subflow: check parent mptcp socket on subflow state change

Crash: WARNING: bad unlock balance in mptcp_poll (log)
Repro: C syz .config
duplicates (2):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
WARNING: bad unlock balance in mptcp_listen 2 604d 605d 0/22 closed as dup on 2020/04/12 08:32
WARNING: bad unlock balance in mptcp_shutdown 2 609d 606d 0/22 closed as dup on 2020/04/11 22:44

Sample crash report:

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2020/04/09 11:00 upstream ae46d2aa6a7f a8c6a3f8 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/04/09 11:26 net f691a25ce5e5 a8c6a3f8 .config log report syz C
ci-upstream-net-kasan-gce 2020/04/09 11:30 net-next 63bef48fd6c9 a8c6a3f8 .config log report syz C
ci-upstream-kasan-gce 2020/04/11 13:56 upstream 5b8b9d0c6d0e a8c6a3f8 .config log report
ci-upstream-kasan-gce-root 2020/04/11 08:07 upstream ab6f762f0f53 a8c6a3f8 .config log report
ci-upstream-kasan-gce 2020/04/10 22:30 upstream c0cc271173b2 a8c6a3f8 .config log report
ci-upstream-kasan-gce 2020/04/09 10:26 upstream ae46d2aa6a7f a8c6a3f8 .config log report
ci-upstream-net-this-kasan-gce 2020/04/12 04:00 net 3b72f84f8fb6 a8c6a3f8 .config log report
ci-upstream-net-this-kasan-gce 2020/04/11 18:35 net 9d8592896fd9 a8c6a3f8 .config log report
ci-upstream-net-kasan-gce 2020/04/14 10:45 net-next 63bef48fd6c9 3f3c5574 .config log report