[PATCH] Wrong bo handles can be referenced in func call, drmModeAddFB2 due to uninitialized array elements in handles[4]

[Dongwon Kim]

Need all bo handles in the array, handles[4] to be initialized with integer value that
indicates "NOT VALID handle" to prevent any of those uninitialized from being processed as
"VALID" handles.

If any of these incorrect handles are passed to the Kernel, it either returns error saying
"invalid bo from userspace" if the handle doesn't exist or returns wrong resource if it
exists but is not for the current task.

Signed-off-by: Dongwon Kim <dongwon.kim at intel.com>
---
 src/compositor-drm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index 9d293bc..6aa405d 100644
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -328,7 +328,8 @@ drm_fb_get_from_bo(struct gbm_bo *bo,
 {
 	struct drm_fb *fb = gbm_bo_get_user_data(bo);
 	uint32_t width, height;
-	uint32_t handles[4], pitches[4], offsets[4];
+	uint32_t handles[4] = {0};
+	uint32_t pitches[4], offsets[4];
 	int ret;
 
 	if (fb)
-- 
1.7.9.5