"WARNING: locking bug in do_ipv6_setsockopt" should share the same root cause with "WARNING: locking bug in do_ipv6_getsockopt"

[慕冬亮]

I found that on the syzbot dashboard, “WARNING: locking bug in
do_ipv6_setsockopt”(https://syzkaller.appspot.com/bug?id=6a970baf20aa5a64455be86fb920f468def703c6)
and
"WARNING: locking bug in do_ipv6_getsockopt"
(https://syzkaller.appspot.com/bug?id=e97be0bf4d30813e951bcc6249e72c592a790164)
should share the same root cause.

The reason for my above statement is that their PoCs have a high
similarity except for the last syscall - "setsockopt vs getsockopt".
In the last syscall, when it invokes lock_sock(sk) and accesses
sk->sk_lock.slock, the WARNING happens.

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--
My best regards to you.

     No System Is Safe!
     Dongliang Mu