diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-01-16 15:54:21 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-01-17 21:10:52 +0000 |
| commit | 1b4bd5c4a663663e8dd4b7b1c5f8565626eb068b (patch) | |
| tree | dc25a4080d33c950bc11fa53636673a27eb58002 /drivers/gpu/drm/i915/intel_display.c | |
| parent | c4aa2eca319c99a4dd21d10ebfd462a2612175f1 (diff) | |
drm/i915: Limit the for_each_set_bit() to the valid range
Let static analyzers (smatch) know that we are not going to wander off
the end of the array by providing a tight upper bound:
drivers/gpu/drm/i915/intel_display.c:9532 hsw_get_transcoder_state() error: buffer overflow 'dev_priv->__info.trans_offsets' 6 <= 31
References: 0716931a82b4 ("drm/i915/icl: fix transcoder state readout")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190116155421.7660-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8d6d7ae311f4..9a6fbce1cafc 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9526,7 +9526,9 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc, * XXX: Do intel_display_power_get_if_enabled before reading this (for * consistency and less surprising code; it's in always on power). */ - for_each_set_bit(panel_transcoder, &panel_transcoder_mask, 32) { + for_each_set_bit(panel_transcoder, + &panel_transcoder_mask, + ARRAY_SIZE(INTEL_INFO(dev_priv)->trans_offsets)) { enum pipe trans_pipe; tmp = I915_READ(TRANS_DDI_FUNC_CTL(panel_transcoder)); |