From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E51E51AFD5; Wed, 30 Sep 2026 17:41:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790790088; cv=none; b=rbDGiz5WzdbFg32bfWAKOpDoQex3ylxafkgYS8C71d2D8nvKHFI761NIaWQdtWwAurMSQ5vpPcXGt/e5lYZMWzZ4wYmK2uUxbrg5KYxILMGJDvH2srz4yBlqmmqMBxTQNv6sPT41+MsYeZ7ddyujpxi4KCiToRQh+TiNx3Bi3X4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790790088; c=relaxed/simple; bh=2Ub7KT6ogWeIgjjDAL14Oo+xzHzIcVtCfJxRgLlwq/k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CX1orqfP4ckSbFoWWImdgiVDcYhxyRPWRLa1YosF2D0yXO7ykn8FdYC6hzwKHcJfJo5MNYilTAL6dX+m+LXOQ6sgFpqLlbj4bpeTugafYGekGmCi54O9UbR8N/FuoL1RD+WeCt7BbhtJ0y9iffcDkw5fDKWycxnx7l2dPlXgQSA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yKshzREl; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="yKshzREl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7F061F000FF; Wed, 30 Sep 2026 17:41:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790790087; bh=qrR+iNMrCZE5sJ6iCbpL73EckIrxaZBDWQAqWnH+AkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=yKshzRElR67Z9GK6J6uF2EBM5YZoq+8G2A4vaPXrTfBZRFRVgbtf1TrD7C5hN1VRl ghBMEixyJXC7VKGciitRxc+jNlyCKU1FrXBMbJ/cPHAPojgD7aA2UBe56HxNmyKgpN cYVK8b8BGs9OxAR0ZyvUd2lExlTeU4fcf9MTJ4dc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Zimmermann , Thierry Reding , Maxime Ripard , Javier Martinez Canillas , Sasha Levin Subject: [PATCH 6.12 706/877] drm/sysfb: simpledrm: Improve framebuffer-size validation Date: Wed, 30 Sep 2026 17:26:57 +0200 Message-ID: <20260930152429.919037862@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152414.738996857@linuxfoundation.org> References: <20260930152414.738996857@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Zimmermann [ Upstream commit 03f1a3545b721fa7fdadd00080e237519a286a97 ] Validate the framebuffer size from the firmware against the limitations of struct drm_display_mode. The type only stores sizes in 16-bit fields. Fail probing on errors. v2: - remove unused function simplefb_get_validated_int0() (Sashiko) Signed-off-by: Thomas Zimmermann Reviewed-by: Thierry Reding Reviewed-by: Maxime Ripard Reviewed-by: Javier Martinez Canillas Fixes: 11e8f5fd223b ("drm: Add simpledrm driver") Cc: # v5.14+ Fixes: 11e8f5fd223b ("drm: Add simpledrm driver") Link: https://patch.msgid.link/20260625094509.157581-2-tzimmermann@suse.de [ adapted shared-validator changes to the existing simplefb_get_validated_int0() helper in drm/tiny/simpledrm.c. ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/tiny/simpledrm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -54,7 +54,7 @@ static int simplefb_get_validated_int0(struct drm_device *dev, const char *name, uint32_t value) { - if (!value) { + if (!value || value > U16_MAX) { drm_err(dev, "simplefb: invalid framebuffer %s of %u\n", name, value); return -EINVAL;