A zero page count reaches drm_mm_init() and causes its zero-range BUG
check to fire. Return an error before allocating and installing the
range manager.
Fixes: 77ef8bbc87be ("drm: make drm_mm_init() return void")
Signed-off-by: Jiale Yao <[email protected]>
---
drivers/gpu/drm/ttm/ttm_range_manager.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_range_manager.c
b/drivers/gpu/drm/ttm/ttm_range_manager.c
index b818836f0726..5fd484ae1706 100644
--- a/drivers/gpu/drm/ttm/ttm_range_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_range_manager.c
@@ -184,6 +184,9 @@ int ttm_range_man_init_nocheck(struct ttm_device *bdev,
struct ttm_resource_manager *man;
struct ttm_range_manager *rman;
+ if (!p_size)
+ return -EINVAL;
+
rman = kzalloc_obj(*rman);
if (!rman)
return -ENOMEM;
--
2.34.1
