Do not allocate zero-length mbuf in sosend_generic().

Found by: pho Sponsored by: Nginx, Inc.
2014-11-19 14:27:38 +00:00 · 2014-11-19 14:27:38 +00:00 · 79b6f9c70a
commit 79b6f9c70a
parent aee9f2a5a3
1 changed files with 1 additions and 1 deletions
--- a/sys/kern/uipc_socket.c
+++ b/sys/kern/uipc_socket.c
@ -1310,7 +1310,7 @@ sosend_generic(struct socket *so, struct sockaddr *addr, struct uio *uio,
 				resid = 0;
 				if (flags & MSG_EOR)
 					top->m_flags |= M_EOR;
-			} else {
+			} else if (resid > 0) {
 				/*
 				 * Copy the data from userland into a mbuf
 				 * chain.  If no data is to be copied in,