tree 6ea783a53cab3815f147b9ade4bda5b3ad09b177
parent c77a4b9cffb6215a15196ec499490d116dfad181
author Mathias Krause <minipli@googlemail.com> 1365299517 +0000
committer David S. Miller <davem@davemloft.net> 1365366482 -0400

netrom: fix info leak via msg_name in nr_recvmsg()

In case msg_name is set the sockaddr info gets filled out, as
requested, but the code fails to initialize the padding bytes of
struct sockaddr_ax25 inserted by the compiler for alignment. Also
the sax25_ndigis member does not get assigned, leaking four more
bytes.

Both issues lead to the fact that the code will leak uninitialized
kernel stack bytes in net/socket.c.

Fix both issues by initializing the memory with memset(0).

Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>