[PATCH] drm/ttm: Initialize local lists in ttm_bo_bulk_move_helper

[PATCH] drm/ttm: Initialize local lists in ttm_bo_bulk_move_helper

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer@amd.com>

The first parameter of list_cut_position() must point to an initialized
list.

Noticed thanks to KASAN pointing out something's fishy here.

Fixes: "drm/ttm: add bulk move function on LRU"
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 39d9d559b279..35d53d81f486 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -250,7 +250,8 @@ EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
 static void ttm_bo_bulk_move_helper(struct ttm_lru_bulk_move_pos *pos,
 				    struct list_head *lru, bool is_swap)
 {
-	struct list_head entries, before;
+	LIST_HEAD(entries);
+	LIST_HEAD(before);
 	struct list_head *list1, *list2;
 
 	list1 = is_swap ? &pos->last->swap : &pos->last->lru;
-- 
2.18.0

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Re: [PATCH] drm/ttm: Initialize local lists in ttm_bo_bulk_move_helper

[Christian König]

Am 28.08.2018 um 18:58 schrieb Michel Dänzer:
> From: Michel Dänzer <michel.daenzer@amd.com>
>
> The first parameter of list_cut_position() must point to an initialized
> list.
>
> Noticed thanks to KASAN pointing out something's fishy here.
>
> Fixes: "drm/ttm: add bulk move function on LRU"
> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 39d9d559b279..35d53d81f486 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -250,7 +250,8 @@ EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
>   static void ttm_bo_bulk_move_helper(struct ttm_lru_bulk_move_pos *pos,
>   				    struct list_head *lru, bool is_swap)
>   {
> -	struct list_head entries, before;
> +	LIST_HEAD(entries);
> +	LIST_HEAD(before);
>   	struct list_head *list1, *list2;
>   
>   	list1 = is_swap ? &pos->last->swap : &pos->last->lru;

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