1 files changed, 1 insertions, 1 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 0be4d24f6ae8..8ee85aa79fa7 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1845,7 +1845,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
                 if (UNIXCB(skb).fp)
                         siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
         }
-        err = size;
+        err = (flags & MSG_TRUNC) ? skb->len - skip : size;
 
         scm_recv(sock, msg, siocb->scm, flags);