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-rw-r--r--sbin/isakmpd/monitor_fdpass.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sbin/isakmpd/monitor_fdpass.c b/sbin/isakmpd/monitor_fdpass.c
index 8031416e7e4..8f3d1a44320 100644
--- a/sbin/isakmpd/monitor_fdpass.c
+++ b/sbin/isakmpd/monitor_fdpass.c
@@ -94,6 +94,10 @@ mm_receive_fd(int socket)
return -1;
}
cmsg = CMSG_FIRSTHDR(&msg);
+ if (cmsg == NULL) {
+ log_error("%s: no message header", __func__);
+ return -1;
+ }
if (cmsg->cmsg_type != SCM_RIGHTS) {
log_error("%s: expected type %d got %d", __func__, SCM_RIGHTS,
cmsg->cmsg_type);