This is a note to let you know that I've just added the patch titled drm/amdgpu: Fix size overflow to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-fix-size-overflow.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 1b0b6e939f112949089e32ec89fd27796677263a Mon Sep 17 00:00:00 2001 From: xinhui pan <xinhui.pan@xxxxxxx> Date: Wed, 7 Apr 2021 19:29:39 +0800 Subject: drm/amdgpu: Fix size overflow MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: xinhui pan <xinhui.pan@xxxxxxx> 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@xxxxxxx> Reviewed-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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; Patches currently in stable-queue which might be from xinhui.pan@xxxxxxx are queue-5.11/drm-radeon-fix-size-overflow.patch queue-5.11/drm-amdgpu-fix-size-overflow.patch