Commit fea3fdf9 authored by 蒋家盛's avatar 蒋家盛 Committed by Thomas Zimmermann
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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: f0adbc38 ("drm/ast: Allocate initial CRTC state of the correct size")
Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20211214014126.2211535-1-jiasheng@iscas.ac.cn
parent 5cf06065

drivers/gpu/drm/ast/ast_mode.c

+4 −1
Original line number Diff line number Diff line
@@ -1121,7 +1121,10 @@ static void ast_crtc_reset(struct drm_crtc *crtc) 
	if (crtc->state)

		crtc->funcs->atomic_destroy_state(crtc, crtc->state);



	if (ast_state)

		__drm_atomic_helper_crtc_reset(crtc, &ast_state->base);

	else

		__drm_atomic_helper_crtc_reset(crtc, NULL);

}



static struct drm_crtc_state *