diff mbox series

[5.11,022/210] drm/amdgpu: Fix size overflow

Message ID 20210412084016.751526558@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 12, 2021, 8:38 a.m. UTC 
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(-)
diff mbox series

Patch

--- 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;