ttm->num_pages is uint32. Hit overflow when << PAGE_SHIFT directly
Signed-off-by: xinhui pan <[email protected]> --- drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 2a61cff325e4..b3fb84b45923 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; -- 2.25.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
