syzbot has bisected this issue to:
commit 40947e13997a1cba4e875893ca6e5d5e61a0689d
Author: Florian Westphal <fw@xxxxxxxxx>
Date: Fri Feb 12 23:59:56 2021 +0000
mptcp: schedule worker when subflow is closed
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=109b88f2d00000
start commit: 9ec5eea5 lib/parman: Delete newline
git tree: net-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=129b88f2d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=149b88f2d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=dbc1ca9e55dc1f9f
dashboard link: https://syzkaller.appspot.com/bug?extid=b0f5178b61ed7f3bbb46
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=177a6d14d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10caeb02d00000
Reported-by: syzbot+b0f5178b61ed7f3bbb46@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 40947e13997a ("mptcp: schedule worker when subflow is closed")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
