From: Alberto Leiva Popper <ydahhrk@gmail.com>
Date: Mon, 11 Mar 2019 18:35:28 +0000 (-0600)
Subject: Prevent integer underflow on sarray_contains()
X-Git-Tag: v0.0.2~73
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e6458b4f307781c626464789e849a03fef6fd10;p=thirdparty%2FFORT-validator.git

Prevent integer underflow on sarray_contains()

Was triggering a segfault during testing.
---

diff --git a/src/sorted_array.c b/src/sorted_array.c
index 6c29b715..35369ca9 100644
--- a/src/sorted_array.c
+++ b/src/sorted_array.c
@@ -150,6 +150,8 @@ sarray_contains(struct sorted_array *sarray, void *elem)
 		switch (cmp) {
 		case SACMP_LEFT:
 		case SACMP_ADJACENT_LEFT:
+			if (mid == 0) /* Prevents underflow */
+				return false;
 			right = mid - 1;
 			continue;
 		case SACMP_RIGHT: