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authorMathias Krause <minipli@googlemail.com>2013-04-07 01:51:53 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-01 08:56:39 -0700
commit65f4ea22548ffdd868d9d98cf91f50bc9978fb69 (patch)
tree5bd59194a56265ce8e4c33ba0c86dcdbf67de5fc /net
parent3aa981cd3ed0ebaecde34fda510602f43180b37e (diff)
irda: Fix missing msg_namelen update in irda_recvmsg_dgram()
[ 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. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/irda/af_irda.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 8ad05f88b45..402af94b968 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)