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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)
committerDavid S. Miller <davem@davemloft.net>
Thu, 21 Nov 2013 02:52:30 +0000 (21:52 -0500)
commit68c6beb373955da0886d8f4f5995b3922ceda4be
tree9e5d243a17858f1b21cb4f011d472a7a57187866tree | snapshot
parentf3d3342602f8bcbf37d7c46641cb9bca7618eb1ccommit | diff
net: add BUG_ON if kernel advertises msg_namelen > sizeof(struct sockaddr_storage)

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>
net/socket.c diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;