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authorMathias Krause <minipli@googlemail.com>2013-04-07 01:51:47 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-07 16:28:00 -0400
commit9b3e617f3df53822345a8573b6d358f6b9e5ed87 (patch)
treebc6ccd35725dddd0b299372947f09532f9f44a74 /net/atm
parent50a75a8914539c5dcd441c5f54d237a666a426fd (diff)
downloadlinux-9b3e617f3df53822345a8573b6d358f6b9e5ed87.tar.gz
atm: update msg_namelen in vcc_recvmsg()
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 vcc_recvmsg() not filling the msg_name in case it was set. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/atm')
-rw-r--r--net/atm/common.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/atm/common.c b/net/atm/common.c
index 7b491006eaf..737bef59ce8 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -531,6 +531,8 @@ int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
struct sk_buff *skb;
int copied, error = -EINVAL;
+ msg->msg_namelen = 0;
+
if (sock->state != SS_CONNECTED)
return -ENOTCONN;