selftests/bpf: Add negative test cases for snprintf

pchaigno · Kernel Patches Daemon · commit 5901255c1a47 · 2025-06-26T09:53:49.000-07:00
This patch adds a couple negative test cases with a trailing % at the
end of the format string.

Signed-off-by: Paul Chaignon &lt;paul.chaignon@gmail.com&gt;
diff --git a/tools/testing/selftests/bpf/prog_tests/snprintf.c b/tools/testing/selftests/bpf/prog_tests/snprintf.c
@@ -116,6 +116,8 @@ static void test_snprintf_negative(void)
 	ASSERT_ERR(load_single_snprintf("%llc"), "invalid specifier 7");
 	ASSERT_ERR(load_single_snprintf("\x80"), "non ascii character");
 	ASSERT_ERR(load_single_snprintf("\x1"), "non printable character");
+	ASSERT_ERR(load_single_snprintf("%p%"), "invalid specifier 8");
+	ASSERT_ERR(load_single_snprintf("%s%"), "invalid specifier 9");
 }
 
 void test_snprintf(void)

Original file line number	Diff line number	Diff line change
`@@ -116,6 +116,8 @@ static void test_snprintf_negative(void)`
`116`	`116`	`ASSERT_ERR(load_single_snprintf("%llc"), "invalid specifier 7");`
`117`	`117`	`ASSERT_ERR(load_single_snprintf("\x80"), "non ascii character");`
`118`	`118`	`ASSERT_ERR(load_single_snprintf("\x1"), "non printable character");`
	`119`	`+ ASSERT_ERR(load_single_snprintf("%p%"), "invalid specifier 8");`
	`120`	`+ ASSERT_ERR(load_single_snprintf("%s%"), "invalid specifier 9");`
`119`	`121`	`}`
`120`	`122`
`121`	`123`	`void test_snprintf(void)`