diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 01:51:47 +0000 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2013-06-10 11:43:40 +0200 |
| commit | 531539ab21be455b59226d241a3274bead7458ab (patch) | |
| tree | 4b9c9f0869df3e68fa521b10db9aab76a539907a | |
| parent | 75ca20885ed80079d507fddda00b805e88258094 (diff) | |
atm: update msg_namelen in vcc_recvmsg()
[ Upstream commit 9b3e617f3df53822345a8573b6d358f6b9e5ed87 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | net/atm/common.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/atm/common.c b/net/atm/common.c index 950bd16d2383..6c82d72687f9 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -473,6 +473,8 @@ 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; if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ |