Commit 5ae94c0d authored by Mathias Krause's avatar Mathias Krause Committed by David S. Miller

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: default avatarMathias Krause <minipli@googlemail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2d6fbfe7
...@@ -1386,6 +1386,8 @@ static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock, ...@@ -1386,6 +1386,8 @@ static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
IRDA_DEBUG(4, "%s()\n", __func__); IRDA_DEBUG(4, "%s()\n", __func__);
msg->msg_namelen = 0;
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &err); flags & MSG_DONTWAIT, &err);
if (!skb) if (!skb)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment