svn commit: r364704 - stable/12/sys/compat/linux

[Edward Tomasz Napierala]

Author: trasz
Date: Mon Aug 24 16:21:03 2020
New Revision: 364704
URL: https://svnweb.freebsd.org/changeset/base/364704

Log:
  MFC r362176:
  
  Make linux(4) warn about unsupported CMSG level/type.
  
  Sponsored by:	The FreeBSD Foundation

Modified:
  stable/12/sys/compat/linux/linux_socket.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/compat/linux/linux_socket.c
==============================================================================
--- stable/12/sys/compat/linux/linux_socket.c	Mon Aug 24 16:15:12 2020	(r364703)
+++ stable/12/sys/compat/linux/linux_socket.c	Mon Aug 24 16:21:03 2020	(r364704)
@@ -1041,8 +1041,12 @@ 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
@@ -1227,6 +1231,9 @@ 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;
 			}