Am 07.04.21 um 13:35 schrieb xinhui pan:
ttm->num_pages is uint32. Hit overflow when << PAGE_SHIFT directly
Fix: 230c079fd (drm/ttm: make num_pages uint32_t)
Signed-off-by: xinhui pan <xinhui.pan@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index fbaa4c148cca..01a5c487505c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -830,7 +830,7 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_device *bdev,
/* Allocate an SG array and squash pages into it */
r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
- ttm->num_pages << PAGE_SHIFT,
+ ttm->num_pages * (1ULL << PAGE_SHIFT),
Good catch, but please make this ((u64)ttm->num_pages) << PAGE_SHIFT
Christian.
GFP_KERNEL);
if (r)
goto release_sg;
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