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drm: mali-dp: potential dereference of null pointer

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[ Upstream commit 73c3ed7495c67b8fbdc31cf58e6ca8757df31a33 ]

The return value of kzalloc() needs to be checked.
To avoid use of null pointer '&state->base' in case of the
failure of alloc.

Fixes: 99665d072183 ("drm: mali-dp: add malidp_crtc_state struct")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Brian Starkey <brian.starkey@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211214100837.46912-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2021-12-14 18:08:37 +08:00 committed by Greg Kroah-Hartman
parent 7e6ad65b6d
commit 4cb37f715f
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/arm/malidp_crtc.c
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@ -487,7 +487,10 @@ static void malidp_crtc_reset(struct drm_crtc *crtc)
if (crtc->state)
malidp_crtc_destroy_state(crtc, crtc->state);
__drm_atomic_helper_crtc_reset(crtc, &state->base);
if (state)
__drm_atomic_helper_crtc_reset(crtc, &state->base);
else
__drm_atomic_helper_crtc_reset(crtc, NULL);
}
static int malidp_crtc_enable_vblank(struct drm_crtc *crtc)