From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.3]) (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 0FE6449365D for ; Mon, 19 Oct 2026 08:43:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.3 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792399389; cv=none; b=t+YCsyktoXFBU+SRLNTeiNbFsTMNA8Z/ezlERK6JM2MSNmSV3dpb1gycaWjyEslDMgSPoJ4LqI1ud35vTF4WfqRIRgZF2v+ofEdr7smWnb5eygYZuCgzRCokBPiIRzl9Fm2JhIirirmH5cxlEKZIrS4x6xt5OCHVB9nvy0LZx1o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792399389; c=relaxed/simple; bh=Lu5TBdIyzKhZ+brnk39mnHDJuYNLWAIYX/dNnqk7HsE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YS3P5YZNgL2j+yClrwEF7ibUtPaaAdTUPazt9IZMJonzovdu7RY6ShKeK7EkpECsEqDt9Nnj3L5upcS8+vFhwS1cRvkfR5i0VjeWDU/rEsOzwEWtkt/9JLT3t+983mNtUbcitQz4O1oLZZq03tRyP9dF1HxTD4lJgnr3uKIgdSc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=gA/ganGW; arc=none smtp.client-ip=220.197.31.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="gA/ganGW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=tk RPXdmYIqMieAMP2DyKNkrVsM6DlDMzPggswxU5olI=; b=gA/ganGWxkDgvPVy9Q 4BDvnetiOhisukt915QCuTz/KTR5YaZ9geKSJPU34QW3HeyAU2sGOLXisxTomi0Y 4CSHv3x2icISupZxKtuqij99L3BzT7nlLsyDGkikrLsFmorlWgTS3c/tCQKkPNS5 fc5XH/tS9QyeS/8CzYAduBMUs= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wDnt9ng19VqcQOlAw--.9091S5; Mon, 19 Oct 2026 16:42:16 +0800 (CST) From: Jiale Yao To: Dave Airlie , Gerd Hoffmann , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= , Ben Skeggs , virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Jiale Yao Subject: [PATCH 3/6] drm/qxl: reject empty TTM memory ranges Date: Mon, 19 Oct 2026 16:41:35 +0800 Message-Id: <20261019084138.1821477-4-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261019084138.1821477-1-yaojiale02@163.com> References: <20261019084138.1821477-1-yaojiale02@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wDnt9ng19VqcQOlAw--.9091S5 X-Coremail-Antispam: 1Uf129KBjvdXoW7GrW8XF18tFW7Xry3Ww4rZrb_yoW3KFc_WF 48Zr97Wr47GF1vyFnrCr43ZFWava1q9F4kXr1Fq3sxXry7CFy8X347ZFn3Xr18u3W7CF95 Ca1Sq39YyFnakjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRhYFkUUUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzghAemrV1+gz1QAA3a A zero page count passed to the range manager reaches drm_mm_init() and causes its zero-range BUG check to fire. Reject empty memory ranges before initializing the manager. Fixes: 37205891d84f ("drm/ttm: make ttm_range_man_init/takedown take type + args") Signed-off-by: Jiale Yao --- drivers/gpu/drm/qxl/qxl_ttm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c index 5d495c4798a3..c8cda805b645 100644 --- a/drivers/gpu/drm/qxl/qxl_ttm.c +++ b/drivers/gpu/drm/qxl/qxl_ttm.c @@ -185,6 +185,9 @@ static int qxl_ttm_init_mem_type(struct qxl_device *qdev, unsigned int type, uint64_t size) { + if (!size) + return -EINVAL; + return ttm_range_man_init(&qdev->mman.bdev, type, false, size); } -- 2.34.1