diff options
| author | Gustavo Padovan <gustavo.padovan@collabora.com> | 2017-01-13 17:22:09 +0300 |
|---|---|---|
| committer | Gustavo Padovan <gustavo.padovan@collabora.com> | 2017-01-17 01:00:54 +0300 |
| commit | 7e9081c5aac73b8a0bc22e0b3e7a12c3e9cf5256 (patch) | |
| tree | 44fbde9719a4eaa462447e2049f30fd1e408bb0c /include/drm | |
| parent | 3846fd9b86001bea171943cc3bb9222cb6da6b42 (diff) | |
| download | linux-7e9081c5aac73b8a0bc22e0b3e7a12c3e9cf5256.tar.xz | |
drm/fence: fix memory overwrite when setting out_fence fd
Currently if the userspace declares a int variable to store the out_fence
fd and pass it to OUT_FENCE_PTR the kernel will overwrite the 32 bits
above the int variable on 64 bits systems.
Fix this by making the internal storage of out_fence in the kernel a s32
pointer.
Reported-by: Chad Versace <chadversary@chromium.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Fixes: beaf5af48034 ("drm/fence: add out-fences support")
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-and-Tested-by: Chad Versace <chadversary@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1484317329-9293-1-git-send-email-gustavo@padovan.org
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_atomic.h | 2 | ||||
| -rw-r--r-- | include/drm/drm_mode_config.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index d6d241f63b9f..56814e8ae7ea 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -144,7 +144,7 @@ struct __drm_crtcs_state { struct drm_crtc *ptr; struct drm_crtc_state *state; struct drm_crtc_commit *commit; - s64 __user *out_fence_ptr; + s32 __user *out_fence_ptr; }; struct __drm_connnectors_state { diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index bf9991b20611..137432386310 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -488,7 +488,7 @@ struct drm_mode_config { /** * @prop_out_fence_ptr: Sync File fd pointer representing the * outgoing fences for a CRTC. Userspace should provide a pointer to a - * value of type s64, and then cast that pointer to u64. + * value of type s32, and then cast that pointer to u64. */ struct drm_property *prop_out_fence_ptr; /** |