From nobody Sat Nov 30 16:39:04 2024 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C005A1AD413; Mon, 9 Sep 2024 06:34:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725863676; cv=none; b=rkuSZY5e0TNPIdM6KTZR8PPa17upjItqZwl2y72joZFQvp4UzymfCBSomArPxcIB6P3Gjq30XnNRHP/TF1JIgQzq6wri9Se0eg5qAJ2JpP91ZxVb0HVe+phGpQmIsjagj7garbbeoa1obiPoXFoztPQWibG/5QuaxrZOdufKeu0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725863676; c=relaxed/simple; bh=Dxd+8h2+3gt8NubO3TPwI1zrCjlxTOnQv/3bwoZTPoE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=bH7kvaJyzOoOx1fl6EhzkWSH9rD2LzAAWlgz8FOtkcHwZ2R/C+IHa3SIgOWeOvrQinTCRWs4zYGhUVT/zoxuQHIneuyzoMCDwg8vlrVu5eVhV4TQHyEGYMyOqGyGfKodhoSQsEARdHWU4hph2v9OQJJkSHflo8FI5x4IOcYz5Vk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by APP-03 (Coremail) with SMTP id rQCowAC3vn7Zlt5mwEkUAg--.35431S2; Mon, 09 Sep 2024 14:34:07 +0800 (CST) From: Ma Ke To: alain.volmat@foss.st.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, benjamin.gaignard@linaro.org, vincent.abriou@st.com, akpm@linux-foundation.org Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ma Ke , stable@vger.kernel.org Subject: [PATCH RESEND] drm/sti: avoid potential dereference of error pointers in sti_gdp_atomic_check Date: Mon, 9 Sep 2024 14:33:59 +0800 Message-Id: <20240909063359.1197065-1-make24@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowAC3vn7Zlt5mwEkUAg--.35431S2 X-Coremail-Antispam: 1UD129KBjvdXoWruF4kGrW7Gw18WF43uryrXrb_yoWfZwcEga 1UXrnYkry7GF1jv3WjywnxAasakFZY9F48Xa48tay3ArWDtry8X3y2gF1rKF1UWa1jqF1D ta1xu3s0gr9akjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbS8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26F4UJV W0owAac4AC62xK8xCEY4vEwIxC4wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC 0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr 1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IE rcIFxwACI402YVCY1x02628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUQvtAUUUUU= X-CM-SenderInfo: ppdnvj2u6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" The return value of drm_atomic_get_crtc_state() needs to be checked. To avoid use of error pointer 'crtc_state' in case of the failure. Cc: stable@vger.kernel.org Fixes: dd86dc2f9ae1 ("drm/sti: implement atomic_check for the planes") Signed-off-by: Ma Ke Acked-by: Alain Volmat --- drivers/gpu/drm/sti/sti_gdp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c index 43c72c2604a0..f046f5f7ad25 100644 --- a/drivers/gpu/drm/sti/sti_gdp.c +++ b/drivers/gpu/drm/sti/sti_gdp.c @@ -638,6 +638,9 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_p= lane, =20 mixer =3D to_sti_mixer(crtc); crtc_state =3D drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + mode =3D &crtc_state->mode; dst_x =3D new_plane_state->crtc_x; dst_y =3D new_plane_state->crtc_y; --=20 2.25.1