diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-03 13:38:24 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-04 09:38:11 +0000 |
| commit | def85091f228e29c6472076fbd6e3a57ece124a9 (patch) | |
| tree | a90ba12bf5dabace2f657437de524964940a8603 /drivers/gpu/drm/i915/display/intel_atomic_plane.c | |
| parent | 08e3ed3ae56bf235e46b8d5d2e36ef1712f14285 (diff) | |
drm/i915/display: Fix NULL-crtc deref in calc_min_cdclk()
[ 23.419442] BUG: KASAN: null-ptr-deref in intel_plane_calc_min_cdclk+0x82/0x440 [i915]
[ 23.419527] Read of size 4 at addr 00000000000000f8 by task insmod/735
[ 23.419578]
[ 23.419644] CPU: 2 PID: 735 Comm: insmod Not tainted 5.5.0+ #114
[ 23.419716] Hardware name: ��������������������������������� ���������������������������������/���������������������������������, BIOS RYBDWi35.86A.0246.2
[ 23.419793] Call Trace:
[ 23.419864] dump_stack+0xef/0x16e
[ 23.419927] __kasan_report.cold+0x60/0x90
[ 23.420157] ? intel_plane_calc_min_cdclk+0x82/0x440 [i915]
[ 23.420397] intel_plane_calc_min_cdclk+0x82/0x440 [i915]
[ 23.420630] intel_atomic_check+0x455f/0x65a0 [i915]
[ 23.420708] ? mark_held_locks+0x90/0x90
[ 23.420929] ? intel_crtc_duplicate_state+0x2e/0x1b0 [i915]
[ 23.421172] ? intel_plane_duplicate_state+0x2d/0xc0 [i915]
[ 23.421239] ? __drm_dbg+0xa4/0x120
[ 23.421303] ? __kasan_kmalloc.constprop.0+0xc2/0xd0
[ 23.421355] ? __kmalloc_track_caller+0x23a/0x320
[ 23.421602] ? intel_calc_active_pipes+0x1c0/0x1c0 [i915]
[ 23.421852] sanitize_watermarks+0x220/0x510 [i915]
[ 23.422092] ? intel_atomic_check+0x65a0/0x65a0 [i915]
[ 23.422164] ? drm_modeset_unlock_all+0x88/0x130
[ 23.422402] intel_modeset_init+0x1b76/0x3c90 [i915]
[ 23.422647] ? intel_finish_reset+0x2d0/0x2d0 [i915]
[ 23.422851] ? intel_irq_install+0x12c/0x210 [i915]
[ 23.423076] i915_driver_probe+0x13e7/0x2930 [i915]
v2: No crtc is implied by an invisible plane, so the extra !crtc check
is redundant.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200203133824.198872-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_atomic_plane.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_atomic_plane.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c index 91ab6e2ab1fd..c86d7a35c816 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c @@ -165,14 +165,15 @@ int intel_plane_calc_min_cdclk(struct intel_atomic_state *state, intel_atomic_get_new_plane_state(state, plane); struct intel_crtc *crtc = to_intel_crtc(plane_state->hw.crtc); const struct intel_cdclk_state *cdclk_state; - struct intel_crtc_state *new_crtc_state = - intel_atomic_get_new_crtc_state(state, crtc); - const struct intel_crtc_state *old_crtc_state = - intel_atomic_get_old_crtc_state(state, crtc); + const struct intel_crtc_state *old_crtc_state; + struct intel_crtc_state *new_crtc_state; if (!plane_state->uapi.visible || !plane->min_cdclk) return 0; + old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); + new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); + new_crtc_state->min_cdclk[plane->id] = plane->min_cdclk(new_crtc_state, plane_state); |