1 files changed, 25 insertions, 1 deletions

diff --git a/monitor_fdpass.c b/monitor_fdpass.c
index 641ce721e..6508c9e47 100644
--- a/monitor_fdpass.c
+++ b/monitor_fdpass.c
@@ -27,10 +27,34 @@
 RCSID("$OpenBSD: monitor_fdpass.c,v 1.4 2002/06/26 14:50:04 deraadt Exp $");
 
 #include <sys/uio.h>
+#include <sys/utsname.h>
 
 #include "log.h"
 #include "monitor_fdpass.h"
 
+static int
+cmsg_type_is_broken(void)
+{
+        static int broken_cmsg_type = -1;
+
+        if (broken_cmsg_type != -1)
+                return broken_cmsg_type;
+        else {
+                struct utsname uts;
+                /* If uname() fails, play safe and assume that cmsg_type
+                 * isn't broken.
+                 */
+                if (!uname(&uts) &&
+                    strcmp(uts.sysname, "Linux") == 0 &&
+                    strncmp(uts.release, "2.0.", 4) == 0)
+                        broken_cmsg_type = 1;
+                else
+                        broken_cmsg_type = 0;
+        }
+
+        return broken_cmsg_type;
+}
+
 void
 mm_send_fd(int socket, int fd)
 {
@@ -113,7 +137,7 @@ mm_receive_fd(int socket)
                 fatal("%s: no fd", __func__);
 #else
         cmsg = CMSG_FIRSTHDR(&msg);
-        if (cmsg->cmsg_type != SCM_RIGHTS)
+        if (!cmsg_type_is_broken() && cmsg->cmsg_type != SCM_RIGHTS)
                 fatal("%s: expected type %d got %d", __func__,
                     SCM_RIGHTS, cmsg->cmsg_type);
         fd = (*(int *)CMSG_DATA(cmsg));