Sasha Levin
2023-Mar-20 00:52 UTC
[PATCH AUTOSEL 6.2 01/30] drm/cirrus: NULL-check pipe->plane.state->fb in cirrus_pipe_update()
From: Alexandr Sapozhnikov <alsp705 at gmail.com> [ Upstream commit 7245e629dcaaf308f1868aeffa218e9849c77893 ] After having been compared to NULL value at cirrus.c:455, pointer 'pipe->plane.state->fb' is passed as 1st parameter in call to function 'cirrus_fb_blit_rect' at cirrus.c:461, where it is dereferenced at cirrus.c:316. Found by Linux Verification Center (linuxtesting.org) with SVACE. v2: * aligned commit message to line-length limits Signed-off-by: Alexandr Sapozhnikov <alsp705 at gmail.com> Reviewed-by: Thomas Zimmermann <tzimmermann at suse.de> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230215171549.16305-1-alsp705 at gmail.com Signed-off-by: Sasha Levin <sashal at kernel.org> --- drivers/gpu/drm/tiny/cirrus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index 678c2ef1cae70..ffa7e61dd1835 100644 --- a/drivers/gpu/drm/tiny/cirrus.c +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -455,7 +455,7 @@ static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe, if (state->fb && cirrus->cpp != cirrus_cpp(state->fb)) cirrus_mode_set(cirrus, &crtc->mode, state->fb); - if (drm_atomic_helper_damage_merged(old_state, state, &rect)) + if (state->fb && drm_atomic_helper_damage_merged(old_state, state, &rect)) cirrus_fb_blit_rect(state->fb, &shadow_plane_state->data[0], &rect); } -- 2.39.2
Maybe Matching Threads
- [PATCH AUTOSEL 5.15 01/17] drm/cirrus: NULL-check pipe->plane.state->fb in cirrus_pipe_update()
- [PATCH AUTOSEL 6.1 01/29] drm/cirrus: NULL-check pipe->plane.state->fb in cirrus_pipe_update()
- [PATCH] drm/cirrus: rewrite and modernize driver.
- [PATCH] drm/cirrus: rewrite and modernize driver.
- [PATCH 00/17] cirrus: Modernize the cirrus driver