Subject: Work around glibc/regex/msan bug regexec returns 0 but does initialize pmatch
Origin: FILE5_30-41-g393dafa4
Upstream-Author: Christos Zoulas <christos@zoulas.com>
Date: Fri Apr 7 20:10:24 2017 +0000

    Found by oss-fuzz.

--- a/src/funcs.c
+++ b/src/funcs.c
@@ -509,6 +509,8 @@
     regmatch_t* pmatch, int eflags)
 {
 	assert(rx->rc == 0);
+	/* XXX: force initialization because glibc does not always do this */
+	memset(pmatch, 0, nmatch * sizeof(*pmatch));
 	return regexec(&rx->rx, str, nmatch, pmatch, eflags);
 }