1 files changed, 5 insertions, 0 deletions
diff --git a/src/src/lookups/readsock.c b/src/src/lookups/readsock.c
index 06058ed17..61f729618 100644
--- a/src/src/lookups/readsock.c
+++ b/src/src/lookups/readsock.c
@@ -256,6 +256,11 @@ if (!cctx->tls_ctx)
 #endif
   {
   FILE * fp = fdopen(cctx->sock, "rb");
+  if (!fp)
+    {
+    log_write(0, LOG_MAIN|LOG_PANIC, "readsock fdopen: %s\n", strerror(errno));
+    goto out;
+    }
   ALARM(timeout);
   yield = cat_file(fp, NULL, eol);
   }