Extend the ring-buffer mapping test coverage by checking an out-of-bound
pgoff which has proven to be problematic in the past.
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Signed-off-by: Vincent Donnefort <vdonnefort@xxxxxxxxxx>
diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c
index d10a847130fb..a58f520f2f41 100644
--- a/tools/testing/selftests/ring-buffer/map_test.c
+++ b/tools/testing/selftests/ring-buffer/map_test.c
@@ -233,12 +233,18 @@ TEST_F(map, data_mmap)
ASSERT_NE(data, MAP_FAILED);
munmap(data, data_len);
- /* Overflow the available subbufs by 1 */
+ /* Offset within ring-buffer bounds, mapping size overflow */
meta_len += desc->meta->subbuf_size * 2;
data = mmap(NULL, data_len, PROT_READ, MAP_SHARED,
desc->cpu_fd, meta_len);
ASSERT_EQ(data, MAP_FAILED);
+ /* Offset outside ring-buffer bounds */
+ data_len = desc->meta->subbuf_size * desc->meta->nr_subbufs;
+ data = mmap(NULL, data_len, PROT_READ, MAP_SHARED,
+ desc->cpu_fd, data_len + (desc->meta->subbuf_size * 2));
+ ASSERT_EQ(data, MAP_FAILED);
+
/* Verify meta-page padding */
if (desc->meta->meta_page_size > getpagesize()) {
data_len = desc->meta->meta_page_size;
base-commit: 61baee2dc5341c936e7fa7b1ca33c5607868de69
--
2.47.1.613.gc27f4b7a9f-goog
