Re: [PATCH v2 net] ping: implement proper locking

From: Eric Dumazet <redacted>
Date: Fri, 24 Mar 2017 19:36:13 -0700

From: Eric Dumazet <edumazet@google.com>

We got a report of yet another bug in ping

http://www.openwall.com/lists/oss-security/2017/03/24/6

->disconnect() is not called with socket lock held.

Fix this by acquiring ping rwlock earlier.

Thanks to Daniel, Alexander and Andrey for letting us know this problem.

Fixes: c319b4d76b9e ("net: ipv4: add IPPROTO_ICMP socket kind")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Daniel Jiang <redacted>
Reported-by: Solar Designer <redacted>
Reported-by: Andrey Konovalov <redacted>

Applied and queued up for -stable, thanks.