net: add BUG_ON if kernel advertises msg_namelen > sizeof(struct sockaddr_storage)
authorHannes Frederic Sowa <hannes@stressinduktion.org>
Thu, 21 Nov 2013 02:14:34 +0000 (03:14 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 8 Dec 2013 15:29:25 +0000 (07:29 -0800)
commit5c586f163dc452d8cc19b456f6f2f3e704025462
tree2b36cbc645e4714ae946801fe45413b85caff0af
parent2f73d7fde99d702cba6a05062c27605a6eef1b78
net: add BUG_ON if kernel advertises msg_namelen > sizeof(struct sockaddr_storage)

[ Upstream commit 68c6beb373955da0886d8f4f5995b3922ceda4be ]

In that case it is probable that kernel code overwrote part of the
stack. So we should bail out loudly here.

The BUG_ON may be removed in future if we are sure all protocols are
conformant.

Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/socket.c