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authorBen Skeggs <bskeggs@redhat.com>2011-09-14 06:08:06 +1000
committerDave Airlie <airlied@redhat.com>2011-09-14 13:34:51 +0100
commitff02b13f6867af72682d7a9bb9bd705f9af2bab0 (patch)
tree09ab99dd19a289a5c079f02c19e95991ffb0c2c8 /drivers/gpu/drm
parent003f6c9df54970d8b19578d195b3e2b398cdbde2 (diff)
drm/ttm: request zeroed system memory pages for new TT buffer objects
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 <marcin.slusarz@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Tested-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index a4d38d85909a..ef06194c5aa6 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;
}

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