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Date: Sat, 14 Sep 2019 07:08:58 +0300 From: Dan Carpenter <dan.carpenter@...cle.com> To: kbuild@...org, Jani Nikula <jani.nikula@...el.com> Cc: kbuild-all@...org, linux-kernel@...r.kernel.org, Chris Wilson <chris@...is-wilson.co.uk> Subject: drivers/gpu/drm/i915/display/intel_display.c:3934 skl_plane_stride() error: testing array offset 'color_plane' after use. tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master head: a7f89616b7376495424f682b6086e0c391a89a1d commit: df0566a641f959108c152be748a0a58794280e0e drm/i915: move modesetting core code under display/ date: 3 months ago If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@...el.com> Reported-by: Dan Carpenter <dan.carpenter@...cle.com> New smatch warnings: drivers/gpu/drm/i915/display/intel_display.c:3934 skl_plane_stride() error: testing array offset 'color_plane' after use. drivers/gpu/drm/i915/display/intel_display.c:16328 intel_sanitize_encoder() error: we previously assumed 'crtc' could be null (see line 16318) git remote add linus https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout df0566a641f959108c152be748a0a58794280e0e vim +/color_plane +3934 drivers/gpu/drm/i915/display/intel_display.c b3cf5c06ca5001 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-25 3926 df79cf44191029 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-11 3927 u32 skl_plane_stride(const struct intel_plane_state *plane_state, 5d2a19507cb665 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-07 3928 int color_plane) d21967740f4b7d drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2016-01-28 3929 { df79cf44191029 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-11 3930 const struct drm_framebuffer *fb = plane_state->base.fb; df79cf44191029 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-11 3931 unsigned int rotation = plane_state->base.rotation; 5d2a19507cb665 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-07 3932 u32 stride = plane_state->color_plane[color_plane].stride; ^^^^^^^^^^^ Out of bounds read? 1b500535c513ac drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2017-03-07 3933 5d2a19507cb665 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-07 @3934 if (color_plane >= fb->format->num_planes) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Tested too late. 1b500535c513ac drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2017-03-07 3935 return 0; 1b500535c513ac drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2017-03-07 3936 b3cf5c06ca5001 drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2018-09-25 3937 return stride / skl_plane_stride_mult(fb, color_plane, rotation); d21967740f4b7d drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2016-01-28 3938 } d21967740f4b7d drivers/gpu/drm/i915/intel_display.c Ville Syrjälä 2016-01-28 3939 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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