From 8215014c1d9d78ef14260a46ee2a136acc3d283a Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 14 Sep 2011 06:08:06 +1000 Subject: [PATCH] drm/ttm: request zeroed system memory pages for new TT buffer objects commit ff02b13f6867af72682d7a9bb9bd705f9af2bab0 upstream. Fixes an information leak to userspace, we were handing out un-zeroed pages for any newly created TTM_PL_TT buffer. Reported-by: Marcin Slusarz Signed-off-by: Ben Skeggs Tested-by: Marcin Slusarz Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/ttm/ttm_bo.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index e2b2d7866877..81b68508dc13 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -394,7 +394,8 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { if (bo->ttm == NULL) { - ret = ttm_bo_add_ttm(bo, false); + bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); + ret = ttm_bo_add_ttm(bo, zero); if (ret) goto out_err; } -- 2.39.5