1 files changed, 2 insertions, 0 deletions

diff --git a/net/core/scm.c b/net/core/scm.c
index 3b6899b7d810..8a1741b14302 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -305,6 +305,8 @@ void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
                         err = put_user(cmlen, &cm->cmsg_len);
                 if (!err) {
                         cmlen = CMSG_SPACE(i*sizeof(int));
+                        if (msg->msg_controllen < cmlen)
+                                cmlen = msg->msg_controllen;
                         msg->msg_control += cmlen;
                         msg->msg_controllen -= cmlen;
                 }