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-rw-r--r--net/compat.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/compat.c b/net/compat.c
index a5848acc1738..8e39ff816fbf 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -69,6 +69,13 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
__get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
__get_user(kmsg->msg_flags, &umsg->msg_flags))
return -EFAULT;
+
+ if (!tmp1)
+ 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_name = compat_ptr(tmp1);