diff options
| author | Rob Clark <robdclark@chromium.org> | 2022-12-16 15:33:55 -0800 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2023-01-10 02:17:50 +0300 |
| commit | 52531258318ed59a2dc5a43df2eaf0eb1d65438e (patch) | |
| tree | 6cc50280fa286f3ae4ebb2d577ca72d8a96653f3 /drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | |
| parent | 0688773f0710528e1ab302c3d6317e269f2e2e6e (diff) | |
drm/virtio: Fix GEM handle creation UAF
Userspace can guess the handle value and try to race GEM object creation
with handle close, resulting in a use-after-free if we dereference the
object after dropping the handle's reference. For that reason, dropping
the handle's reference must be done *after* we are done dereferencing
the object.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Fixes: 62fb7a5e1096 ("virtio-gpu: add 3d/virgl support")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221216233355.542197-2-robdclark@gmail.com
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c')
0 files changed, 0 insertions, 0 deletions