Avoid a potential out of bounds read found by enh while fuzzing

with address sanitizer enabled.

diff --git a/lib/util/fnmatch.c b/lib/util/fnmatch.c
index 8861937d48cbad0ecab4796bff5ed596a6ad7d22..18855992d9322f23c642c17034c8d35ebc93cf74 100644 (file)
--- a/lib/util/fnmatch.c
+++ b/lib/util/fnmatch.c
@@ -188,6 +188,8 @@ static int fnmatch_ch(const char **pattern, const char **string, int flags)
                 result = 0;
                 continue;
             }
+            if (!**pattern)
+                break;
 
 leadingclosebrace:
             /* Look at only well-formed range patterns;