svn commit: r362176 - head/sys/compat/linux

[Edward Tomasz Napierala]

Author: trasz
Date: Sun Jun 14 14:38:40 2020
New Revision: 362176
URL: https://svnweb.freebsd.org/changeset/base/362176

Log:
  Make linux(4) warn about unsupported CMSG level/type.
  
  MFC after:	2 weeks
  Sponsored by:	The FreeBSD Foundation
  Differential Revision:	https://reviews.freebsd.org/D25255

Modified:
  head/sys/compat/linux/linux_socket.c

Modified: head/sys/compat/linux/linux_socket.c
==============================================================================
--- head/sys/compat/linux/linux_socket.c	Sun Jun 14 11:41:57 2020	(r362175)
+++ head/sys/compat/linux/linux_socket.c	Sun Jun 14 14:38:40 2020	(r362176)
@@ -1042,8 +1042,12 @@ linux_sendmsg_common(struct thread *td, l_int s, struc
 			cmsg->cmsg_level =
 			    linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
 			if (cmsg->cmsg_type == -1
-			    || cmsg->cmsg_level != SOL_SOCKET)
+			    || cmsg->cmsg_level != SOL_SOCKET) {
+				linux_msg(curthread,
+				    "unsupported sendmsg cmsg level %d type %d",
+				    linux_cmsg.cmsg_level, linux_cmsg.cmsg_type);
 				goto bad;
+			}
 
 			/*
 			 * Some applications (e.g. pulseaudio) attempt to
@@ -1228,6 +1232,9 @@ linux_recvmsg_common(struct thread *td, l_int s, struc
 			    bsd_to_linux_sockopt_level(cm->cmsg_level);
 			if (linux_cmsg->cmsg_type == -1 ||
 			    cm->cmsg_level != SOL_SOCKET) {
+				linux_msg(curthread,
+				    "unsupported recvmsg cmsg level %d type %d",
+				    cm->cmsg_level, cm->cmsg_type);
 				error = EINVAL;
 				goto bad;
 			}