[Qemu-devel] [PATCH 1/2] net: socket backend passes junk size to getsockname(), fix

[Markus Armbruster <armbru@redhat.com>]

net_socket_fd_init_dgram() passes an uninitialized address length to
getsockname().  I guess this happens to work as long as the junk value
is at least sizeof(sockaddr_in).

Spotted by Coverity.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 net/socket.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index e9ef128..eb3e0d6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -260,6 +260,7 @@ static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
      */
 
     if (is_connected) {
+        saddr_len = sizeof(saddr);
 	if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
 	    /* must be bound */
 	    if (saddr.sin_addr.s_addr==0) {
-- 
1.7.6.4