1 files changed, 10 insertions, 0 deletions
diff --git a/net/core/scm.c b/net/core/scm.c
index 4f6a14babe5a..733c0cbd393d 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -282,6 +282,16 @@ efault:
 }
 EXPORT_SYMBOL(put_cmsg);
 
+int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len,
+		     void *data)
+{
+	/* Don't produce truncated CMSGs */
+	if (!msg->msg_control || msg->msg_controllen < CMSG_LEN(len))
+		return -ETOOSMALL;
+
+	return put_cmsg(msg, level, type, len, data);
+}
+
 void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss_internal)
 {
 	struct scm_timestamping64 tss;