diff options
| author | Alexandr Sapozhnikov <alsp705@gmail.com> | 2023-02-15 20:15:49 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-02-17 13:32:10 +0300 |
| commit | 7245e629dcaaf308f1868aeffa218e9849c77893 (patch) | |
| tree | 868f55613d2ca92a38cbfb437675761c1b38970f | |
| parent | a950b989ea29ab3b38ea7f6e3d2540700a3c54e8 (diff) | |
| download | linux-7245e629dcaaf308f1868aeffa218e9849c77893.tar.xz | |
drm/cirrus: NULL-check pipe->plane.state->fb in cirrus_pipe_update()
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@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230215171549.16305-1-alsp705@gmail.com
| -rw-r--r-- | drivers/gpu/drm/tiny/cirrus.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index 678c2ef1cae7..ffa7e61dd183 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); } |