isl_arg.c: drop_argument: avoid out-of-bounds array accesses

Reported-by: Tobias Grosser <tobias@grosser.es>
Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_arg.c b/isl_arg.c
index f2025ee..3e2188b 100644 (file)
--- a/isl_arg.c
+++ b/isl_arg.c
@@ -1117,7 +1117,7 @@ static void print_version_and_exit(struct isl_arg *decl)
 
 static int drop_argument(int argc, char **argv, int drop, int n)
 {
-       for (; drop < argc; ++drop)
+       for (; drop + n < argc; ++drop)
                argv[drop] = argv[drop + n];
 
        return argc - n;