From: Jiasheng Jiang jiasheng@iscas.ac.cn
mainline inclusion from mainline-v5.19-rc1 commit 73c3ed7495c67b8fbdc31cf58e6ca8757df31a33 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6698V CVE: CVE-2022-3115
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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-jiashen...
Conflicts: drivers/gpu/drm/arm/malidp_crtc.c
Signed-off-by: ChenXiaoSong chenxiaosong2@huawei.com Reviewed-by: Zhang Xiaoxu zhangxiaoxu5@huawei.com Reviewed-by: Xiu Jianfeng xiujianfeng@huawei.com Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- drivers/gpu/drm/arm/malidp_crtc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c index ef44202fb43f..8d722d2ce20a 100644 --- a/drivers/gpu/drm/arm/malidp_crtc.c +++ b/drivers/gpu/drm/arm/malidp_crtc.c @@ -473,6 +473,8 @@ static void malidp_crtc_reset(struct drm_crtc *crtc) if (state) { crtc->state = &state->base; crtc->state->crtc = crtc; + } else { + crtc->state = NULL; } }