diff options
| author | xinhui pan <xinhui.pan@amd.com> | 2021-04-07 15:57:50 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-04-09 23:54:35 +0300 |
| commit | a441d7ea5c7b60943b8873d044eaa858b0caadf0 (patch) | |
| tree | 9c7ee846b5c868442bf666bda91bf4e2f77f7401 /drivers/gpu/drm/radeon/radeon_ttm.c | |
| parent | b16e685725a92bd7fd8496e38468622caf743771 (diff) | |
| download | linux-a441d7ea5c7b60943b8873d044eaa858b0caadf0.tar.xz | |
drm/radeon: Fix size overflow
ttm->num_pages is uint32. Hit overflow when << PAGE_SHIFT directly
Fixes: 230c079fdcf4 ("drm/ttm: make num_pages uint32_t")
Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_ttm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index cdb6d3efd07d..380b3007fd0b 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -360,7 +360,7 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) { /* check that we only pin down anonymous memory to prevent problems with writeback */ - unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE; + unsigned long end = gtt->userptr + (u64)ttm->num_pages * PAGE_SIZE; struct vm_area_struct *vma; vma = find_vma(gtt->usermm, gtt->userptr); if (!vma || vma->vm_file || vma->vm_end < end) @@ -382,7 +382,7 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm } while (pinned < ttm->num_pages); r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0, - ttm->num_pages << PAGE_SHIFT, + (u64)ttm->num_pages << PAGE_SHIFT, GFP_KERNEL); if (r) goto release_sg; |