drm/i915: Fix NULL ptr deref by checking new_crtc_state

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[ Upstream commit a41d985902 ]

intel_atomic_get_new_crtc_state can return NULL, unless crtc state wasn't
obtained previously with intel_atomic_get_crtc_state, so we must check it
for NULLness here, just as in many other places, where we can't guarantee
that intel_atomic_get_crtc_state was called.
We are currently getting NULL ptr deref because of that, so this fix was
confirmed to help.

Fixes: 74a75dc908 ("drm/i915/display: move plane prepare/cleanup to intel_atomic_plane.c")
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230505082212.27089-1-stanislav.lisovskiy@intel.com
(cherry picked from commit 1d5b09f8da)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Stanislav Lisovskiy 2023-05-05 11:22:12 +03:00 • committed by Greg Kroah-Hartman

parent 1b485f39ac

commit dbf25cc21b

1 changed files with 2 additions and 2 deletions

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drivers/gpu/drm/i915/display/intel_atomic_plane.c

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