drm/tegra: Fix a possible null pointer dereference

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commit 780351a5f6 upstream.

In tegra_crtc_reset(), new memory is allocated with kzalloc(), but
no check is performed. Before calling __drm_atomic_helper_crtc_reset,
state should be checked to prevent possible null pointer dereference.

Fixes: b7e0b04ae4 ("drm/tegra: Convert to using __drm_atomic_helper_crtc_reset() for reset.")
Cc: stable@vger.kernel.org
Signed-off-by: Qiu-ji Chen <chenqiuji666@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20241106095906.15247-1-chenqiuji666@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Qiu-ji Chen 2024-11-06 17:59:06 +08:00 • committed by Greg Kroah-Hartman

parent 7271a32074

commit 31ac2c680a

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/tegra/dc.c

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