[PATCH v2 1/7] drm/panic: Fix uninitialized drm_scanout_buffer.set_pixel() crash

[Geert Uytterhoeven]

No implementations of drm_plane_helper_funcs.get_scanout_buffer() fill
in the optional drm_scanout_buffer.set_pixel() member.  Hence the member
may contain non-zero garbage, causing a crash when deferencing it during
drm panic.

Fix this by pre-initializing the drm_scanout_buffer object before
calling drm_plane_helper_funcs.get_scanout_buffer().

Fixes: 24d07f114e4ec760 ("drm/panic: Add a set_pixel() callback to drm_scanout_buffer")
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
v2:
  - New.
---
 drivers/gpu/drm/drm_panic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 293d4dcbc80da7ba..fc04ed4e0b399f55 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -582,7 +582,7 @@ static void draw_panic_dispatch(struct drm_scanout_buffer *sb)
 
 static void draw_panic_plane(struct drm_plane *plane)
 {
-	struct drm_scanout_buffer sb;
+	struct drm_scanout_buffer sb = { };
 	int ret;
 	unsigned long flags;
 
-- 
2.34.1