From: Amol Grover <redacted>
Date: Fri, 21 Feb 2020 23:27:14 +0530

md5sig->head maybe traversed using hlist_for_each_entry_rcu
outside an RCU read-side critical section but under the protection
of socket lock.

Hence, add corresponding lockdep expression to silence false-positive
warnings, and harden RCU lists.

Signed-off-by: Amol Grover <redacted>

Applied.