From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) (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 E0BAD493D26 for ; Mon, 19 Oct 2026 08:43:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792399418; cv=none; b=W/XWo/af8dZdoWridIzmDEyWzNaAth0mZlznaZtu70kKkgz9GRzGWPiXehWDMEp1KmKCaw9xENQGMdvfklajYu2dsmxHG+WmMjPMXyTs7EEQ5wqXRhVNlyonukLR0oY8Rdw1fdc1qbnCLZ2azq/2xdPsnZDByZ4olNvlAQNi8zs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792399418; c=relaxed/simple; bh=wXweUhgcBOLBorS8EuIE1GKRjd1xEwrZr0imlei1aiQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=kytELMiwnDmD3XsR/lyQlArTkov1RW4yq7FnXQKXUc8Mn16gXvyy72Dn5kpczE4d0++1DuMAqGnsa/bFjawatl5usTaVzmbz+WJlOOQdB9AHPkHs7LocKoBj0pvxcLL5CnONQwxqBtAvpyJtPwd5LrnWjaG0cQVWgcoRDJLcVhI= 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=AzdtfAe5; arc=none smtp.client-ip=220.197.31.5 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="AzdtfAe5" 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=ig E/kEh0g7gFKv5PAwWV/CKHlROUnBFZYW4mh6vr2N4=; b=AzdtfAe5zCDyzRWfoy A8T89jA2HQr8wbyEZdpPqe/doMfmtb9xr4UUbuMykAvVfcCXOEvfuLObr+ILhobp Zk9lujS6CP6KKg9YJeEC9+/DkFLfwCNo35LZ4C+rU2LMSgHi93QP73mb3EnU+Q0I PChWPOT8P+Ax5fzR8RSis8rNA= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wDnt9ng19VqcQOlAw--.9091S2; Mon, 19 Oct 2026 16:42:10 +0800 (CST) From: Jiale Yao To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Lyude Paul , Danilo Krummrich , Dave Airlie , Gerd Hoffmann , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , Huang Rui , Matthew Auld , Matthew Brost , Zack Rusin , Broadcom internal kernel review list , Ben Skeggs , David Rheinsberg , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Cc: Jiale Yao Subject: [PATCH 0/6] drm: reject empty TTM range manager sizes Date: Mon, 19 Oct 2026 16:41:32 +0800 Message-Id: <20261019084138.1821477-1-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 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--.9091S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7GrWkAFWUGFW8GFyfAw4rGrg_yoWkArb_u3 40vas7Wr1UGrnxXF4Iyr47Ar12ka1UuayDZwnFv3y3Ary3Xr1UX348Gr93Ww18C3Z8KFn0 krnYqw1YyrnIkjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRt9a97UUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbC7wM+eGrV1+M2UQAA3G drm_mm_init() rejects a zero-length allocation range with a BUG check. Several DRM TTM users can derive a zero page count from device-provided VRAM metadata and pass it to the range manager. This series rejects empty ranges at the affected callers and adds a defensive check in the common range manager. Patches 1 through 4 and 6 validate the individual driver inputs. Patch 5 protects the shared range-manager API against any remaining zero-page caller. The series was checked with scripts/checkpatch.pl for every code patch. Jiale Yao (6): drm/vram-helper: reject empty VRAM ranges drm/nouveau: reject empty VRAM ranges drm/qxl: reject empty TTM memory ranges drm/radeon: reject empty VRAM ranges drm/ttm: reject empty range manager sizes drm/vmwgfx: reject empty VRAM ranges drivers/gpu/drm/drm_gem_vram_helper.c | 3 +++ drivers/gpu/drm/nouveau/nouveau_ttm.c | 3 +++ drivers/gpu/drm/qxl/qxl_ttm.c | 3 +++ drivers/gpu/drm/radeon/radeon_ttm.c | 3 +++ drivers/gpu/drm/ttm/ttm_range_manager.c | 3 +++ drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 4 ++++ 6 files changed, 19 insertions(+) -- 2.34.1