caif: Fix missing msg_namelen update in caif_seqpkt_recvmsg()
authorMathias Krause <minipli@googlemail.com>
Sun, 7 Apr 2013 01:51:52 +0000 (01:51 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 1 May 2013 16:41:04 +0000 (09:41 -0700)
commit3300687d7ebb7a8abd9945843629b09194d97430
tree295d964990f8c342f62b0816a04df330f309f5b6
parent2d97f68d03180ad0a47fdb7c02f0fecdac9ad9a7
caif: Fix missing msg_namelen update in caif_seqpkt_recvmsg()

[ Upstream commit 2d6fbfe733f35c6b355c216644e08e149c61b271 ]

The current code does not fill the msg_name member in case it is set.
It also does not set the msg_namelen member to 0 and therefore makes
net/socket.c leak the local, uninitialized sockaddr_storage variable
to userland -- 128 bytes of kernel stack memory.

Fix that by simply setting msg_namelen to 0 as obviously nobody cared
about caif_seqpkt_recvmsg() not filling the msg_name in case it was
set.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/caif/caif_socket.c