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drm/ast: potential dereference of null pointer
The return value of kzalloc() needs to be checked.
To avoid use of null pointer '&ast_state->base' in case of the
failure of alloc.
Fixes: f0adbc382b
("drm/ast: Allocate initial CRTC state of the correct size")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20211214014126.2211535-1-jiasheng@iscas.ac.cn
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1 changed files with 4 additions and 1 deletions
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@ -1121,7 +1121,10 @@ static void ast_crtc_reset(struct drm_crtc *crtc)
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if (crtc->state)
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crtc->funcs->atomic_destroy_state(crtc, crtc->state);
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__drm_atomic_helper_crtc_reset(crtc, &ast_state->base);
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if (ast_state)
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__drm_atomic_helper_crtc_reset(crtc, &ast_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 struct drm_crtc_state *
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