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 F26B048FF8D for ; Mon, 19 Oct 2026 08:42:51 +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=1792399375; cv=none; b=jWms2FqGC41gF8l21wHQ1ltD8Ob3GuGb/nL+xA5oezD+R+q1bl9dNaHyXElpB/2KJK3xwsKoVDCbEl2e+wkM8xzP9ZWNczihxtXzU7jJqFLE8XBdLqfxVk37/jv0RJt6AtkNvrCdumem7lvYl8sMEgyK4IBGKUGXmjqkftdG1bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792399375; c=relaxed/simple; bh=Ca3mi8X7qY9ar+qDu3uo3Sq5SV2qJRrrGEnlR97F5qs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fuaJue8O05/HGzjqje6fxJxT60Lt0Zun074tjafO8oBnCIrydyKYiuSBWCgZDfgPGurs5eAmbvkC2sg2/+sYDAlA5mMieJRM/pCxOh2DXGi8SqyDUcuoL0Drx8AX8eW1hzLNcoJgq2N4zJu0Lk7xvWNLiCyCTHd5uKNTG/tvSl0= 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=W+SsKTAA; 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="W+SsKTAA" 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=wh cwWcGUKRfvtRwNpcj2S48Yg35okxV42v9ufuqcUeM=; b=W+SsKTAAxDCRa/2MyW 7zwswFvwlpPCDRlltEZ6E+KT3p5mq8UV4sv+a4IF2KMh5C+zcUmpysq+ubRRPi3J iL3hGfLCqIJFXAGLjmHqL4FxmxdDIzbKa47RmRvysgh7NA4n0oa/lrTrfpGao2U6 n1EYUuUgdyKUVkGdCIUqmVwmM= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wDnt9ng19VqcQOlAw--.9091S4; Mon, 19 Oct 2026 16:42:15 +0800 (CST) From: Jiale Yao To: Lyude Paul , Danilo Krummrich , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Ben Skeggs , Dave Airlie , =?UTF-8?q?Christian=20K=C3=B6nig?= , dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Jiale Yao Subject: [PATCH 2/6] drm/nouveau: reject empty VRAM ranges Date: Mon, 19 Oct 2026 16:41:34 +0800 Message-Id: <20261019084138.1821477-3-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--.9091S4 X-Coremail-Antispam: 1Uf129KBjvdXoWrKrWUZw17Xr1kArW3ZF18Xwb_yoWDXFc_CF 4xXFn3Gr1kKrWDtw4DAr43XFW2ka1UWF40vrs2qasxtry7XrySg347Xr1fXrykC3WIgFZ5 G3Z0van5KFnI9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRJManUUUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzgc-eWrV1+czqwAA3Y A VRAM range smaller than a page becomes a zero-page TTM range and causes drm_mm_init() to hit its zero-range BUG check. Reject it before creating the VRAM manager. Fixes: 37205891d84f ("drm/ttm: make ttm_range_man_init/takedown take type + args") Signed-off-by: Jiale Yao --- drivers/gpu/drm/nouveau/nouveau_ttm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index cfc0868e2dd3..99c74c3b5976 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -181,6 +181,9 @@ nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind) static int nouveau_ttm_init_vram(struct nouveau_drm *drm) { + if (drm->gem.vram_available < PAGE_SIZE) + return -EINVAL; + if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) { struct ttm_resource_manager *man = kzalloc_obj(*man); -- 2.34.1