X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=net%2Fcompat.c;h=f7bd286a82807148bed32622e5de2f975450c877;hb=f5f321c43150cb4db8f342c8479c6fbdbe20b338;hp=94d3d5e978832cba85b7212988f735780ceed9dd;hpb=39ed853a2447ce85cf29b3c0357998ff968beeb5;p=karo-tx-linux.git

diff --git a/net/compat.c b/net/compat.c
index 94d3d5e97883..f7bd286a8280 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -49,6 +49,13 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
 	    __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
 	    __get_user(kmsg->msg_flags, &umsg->msg_flags))
 		return -EFAULT;
+
+	if (!uaddr)
+		kmsg->msg_namelen = 0;
+
+	if (kmsg->msg_namelen < 0)
+		return -EINVAL;
+
 	if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
 		kmsg->msg_namelen = sizeof(struct sockaddr_storage);
 	kmsg->msg_control = compat_ptr(tmp3);