irda: Fix missing msg_namelen update in irda_recvmsg_dgram()
authorMathias Krause <minipli@googlemail.com>
Sun, 7 Apr 2013 01:51:53 +0000 (01:51 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 7 Apr 2013 20:28:01 +0000 (16:28 -0400)
commit5ae94c0d2f0bed41d6718be743985d61b7f5c47d
tree9c2fa1836abb56a44492a41b56121a7dd9e6e6b3
parent2d6fbfe733f35c6b355c216644e08e149c61b271
irda: Fix missing msg_namelen update in irda_recvmsg_dgram()

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 irda_recvmsg_dgram() not filling the msg_name in case it was
set.

Cc: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/irda/af_irda.c