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drm/ttm: Read buffer overflow

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Check whether index is within bounds before grabbing the element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Roel Kluin 2009-08-03 14:22:53 +02:00 • committed by Dave Airlie
parent fa99239cb7
commit c96e7c7a3a
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/ttm/ttm_bo.c
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@ -1182,13 +1182,14 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
{ {
struct ttm_mem_type_manager *man = &bdev->man[mem_type]; struct ttm_mem_type_manager *man;
int ret = -EINVAL; int ret = -EINVAL;
if (mem_type >= TTM_NUM_MEM_TYPES) { if (mem_type >= TTM_NUM_MEM_TYPES) {
printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type); printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type);
return ret; return ret;
} }
man = &bdev->man[mem_type];
if (!man->has_type) { if (!man->has_type) {
printk(KERN_ERR TTM_PFX "Trying to take down uninitialized " printk(KERN_ERR TTM_PFX "Trying to take down uninitialized "