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drm: mali-dp: potential dereference of null pointer
[ Upstream commit73c3ed7495
] 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:99665d0721
("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>
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1 changed files with 4 additions and 1 deletions
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@ -487,7 +487,10 @@ static void malidp_crtc_reset(struct drm_crtc *crtc)
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if (crtc->state)
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malidp_crtc_destroy_state(crtc, crtc->state);
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__drm_atomic_helper_crtc_reset(crtc, &state->base);
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if (state)
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__drm_atomic_helper_crtc_reset(crtc, &state->base);
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else
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__drm_atomic_helper_crtc_reset(crtc, NULL);
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}
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static int malidp_crtc_enable_vblank(struct drm_crtc *crtc)
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