From: xinhui pan xinhui.pan@amd.com
commit 1b0b6e939f112949089e32ec89fd27796677263a upstream.
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 Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -907,7 +907,7 @@ static int amdgpu_ttm_tt_pin_userptr(str
/* 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, + (u64)ttm->num_pages << PAGE_SHIFT, GFP_KERNEL); if (r) goto release_sg;