X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftal%2Ftest%2Frun-overflow.c;h=c5daf97d2794b99966dd59e959cdab7d649be87f;hp=989fcd2aba2eee5e9339e06abdd3be4eb7549644;hb=680aa496521811e7c60afb940bcae5024f4c6adb;hpb=5582b011948769779b0d839d35873c2bc557f9cb

diff --git a/ccan/tal/test/run-overflow.c b/ccan/tal/test/run-overflow.c
index 989fcd2a..c5daf97d 100644
--- a/ccan/tal/test/run-overflow.c
+++ b/ccan/tal/test/run-overflow.c
@@ -13,8 +13,9 @@ int main(void)
 {
 	void *p;
 	int *pi, *origpi;
+	char *cp;
 
-	plan_tests(26);
+	plan_tests(30);
 
 	tal_set_backend(NULL, NULL, NULL, my_error);
 
@@ -81,5 +82,17 @@ int main(void)
 	ok1(error_count == 1);
 	ok1(!tal_first(NULL));
 
+	/* Overflow on expand addition. */
+	cp = tal_arr(p, char, 100);
+	ok1(!tal_expand(&cp, NULL, (size_t)-99UL));
+	ok1(error_count == 2);
+	tal_free(cp);
+
+	/* Overflow when multiplied by size */
+	origpi = tal_arr(NULL, int, 100);
+	ok1(!tal_expand(&origpi, NULL, (size_t)-1UL / sizeof(int)));
+	ok1(error_count == 3);
+	tal_free(origpi);
+
 	return exit_status();
 }