Commit acf6c991 authored by Hannes Frederic Sowa's avatar Hannes Frederic Sowa Committed by Lorenzo Colitti
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ping: prevent NULL pointer dereference on write to msg_name 



A plain read() on a socket does set msg->msg_name to NULL. So check for
NULL pointer first.

[Backport of net-next cf970c00]

Bug: 12780426
Change-Id: Ida66892d359d2dfbb32803d8b0872bf8c0bb3865
Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarLorenzo Colitti <lorenzo@google.com>
parent 2266676c
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