ipv6: IPV6_PKTINFO relied userspace providing correct length
authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Mon, 5 Jan 2009 01:27:31 +0000 (17:27 -0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 5 Jan 2009 01:27:31 +0000 (17:27 -0800)
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ipv6_sockglue.c

index eeeaad2..40f3246 100644 (file)
@@ -404,7 +404,7 @@ sticky_done:
                else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
                        goto e_inval;
 
-               if (copy_from_user(&pkt, optval, optlen)) {
+               if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
                                retv = -EFAULT;
                                break;
                }