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linux-stable/drivers/gpu/drm/tests
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David Gow 7089003304
drm: tests: Fix a buffer overflow in format_helper_test 
The xrgb2101010 format conversion test (unlike for other formats) does
an endianness conversion on the results. However, it always converts
TEST_BUF_SIZE 32-bit integers, which results in reading from (and
writing to) more memory than in present in the result buffer. Instead,
use the buffer size, divided by sizeof(u32).

The issue could be reproduced with KASAN:
./tools/testing/kunit/kunit.py run --kunitconfig drivers/gpu/drm/tests \
	--kconfig_add CONFIG_KASAN=y --kconfig_add CONFIG_KASAN_VMALLOC=y \
	--kconfig_add CONFIG_KASAN_KUNIT_TEST=y \
	drm_format_helper_test.*xrgb2101010

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Fixes: 4531143196 ("drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_xrgb2101010()")
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Maíra Canal <mairacanal@riseup.net>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221019073239.3779180-1-davidgow@google.com
2022-10-20 09:56:05 +02:00
..
.kunitconfig
drm_buddy_test.c treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
drm_cmdline_parser_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
drm_damage_helper_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
drm_dp_mst_helper_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
drm_format_helper_test.c drm: tests: Fix a buffer overflow in format_helper_test 2022-10-20 09:56:05 +02:00
drm_format_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
drm_framebuffer_test.c drm/tests: Split drm_framebuffer_create_test into parameterized tests 2022-09-14 13:53:33 -03:00
drm_mm_test.c treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
drm_plane_helper_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
drm_rect_test.c drm/tests: Change "igt_" prefix to "drm_test_" 2022-09-14 13:53:33 -03:00
Makefile drm: selftest: convert drm_mm selftest to KUnit 2022-07-11 14:00:05 +02:00