| Date | Mon, 06 May 2013 23:58:52 -0400 | From | Steven Rostedt <> | Subject | [100/126] irda: Fix missing msg_namelen update in irda_recvmsg_dgram() |
| |
3.6.11.3 stable review patch. If anyone has any objections, please let me know.
------------------
From: Mathias Krause <minipli@googlemail.com>
[ Upstream commit 5ae94c0d2f0bed41d6718be743985d61b7f5c47d ]
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> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- net/irda/af_irda.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c index 73dfe2c..927ff4d 100644 --- a/net/irda/af_irda.c +++ b/net/irda/af_irda.c @@ -1386,6 +1386,8 @@ static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock, IRDA_DEBUG(4, "%s()\n", __func__); + msg->msg_namelen = 0; + skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &err); if (!skb) -- 1.7.10.4
|