[master] 1daa9be Error checking for vsb allocation failure in VRT_synth_page() / VCL synthetic()

[Nils Goroll]

commit 1daa9be95e283e9e73376c45ae7cf28c67cfb054
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Thu Sep 21 17:05:45 2017 +0200

    Error checking for vsb allocation failure in VRT_synth_page() / VCL synthetic()

diff --git a/bin/varnishd/cache/cache_vrt.c b/bin/varnishd/cache/cache_vrt.c
index ecd2374..cf57413 100644
--- a/bin/varnishd/cache/cache_vrt.c
+++ b/bin/varnishd/cache/cache_vrt.c
@@ -438,7 +438,11 @@ VRT_synth_page(VRT_CTX, const char *str, ...)
 	while (p != vrt_magic_string_end) {
 		if (p == NULL)
 			p = "(null)";
-		VSB_cat(vsb, p);
+		if (VSB_cat(vsb, p)) {
+			VRT_fail(ctx, "synthetic(): %s",
+				 strerror(VSB_error(vsb)));
+			break;
+		}
 		p = va_arg(ap, const char *);
 	}
 	va_end(ap);