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VSOCK: Fix missing msg_namelen update in vsock_stream_recvmsg() 

The code misses to update 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.

Cc: Andy King <acking@vmware.com>
Cc: Dmitry Torokhov <dtor@vmware.com>
Cc: George Zhang <georgezhang@vmware.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mathias Krause 2013-04-07 01:52:02 +00:00 committed by David S. Miller
parent 680d04e0ba
commit d5e0d0f607
1 changed files with 2 additions and 0 deletions
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2
net/vmw_vsock/af_vsock.c
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@ -1670,6 +1670,8 @@ vsock_stream_recvmsg(struct kiocb *kiocb,
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {