From nobody Fri Dec 19 18:42:04 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C67DCECAAA1 for ; Mon, 24 Oct 2022 13:52:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236495AbiJXNv5 (ORCPT ); Mon, 24 Oct 2022 09:51:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235971AbiJXNvR (ORCPT ); Mon, 24 Oct 2022 09:51:17 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D052BA922; Mon, 24 Oct 2022 05:42:19 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 04C6A612E1; Mon, 24 Oct 2022 12:41:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18DCBC433D6; Mon, 24 Oct 2022 12:41:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615311; bh=qPnxopLTQHV79B90wxJyp54v1UlgLbcth3uYypFrUBQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gbToQm8RANQBKQXiBNc6cRXc4f+mjzZdtlDbeVneiL5GXmm+NOWmv7mkNqUfrLeal l/ZLPFMMqdZBSdZl+qMHFByA3O5P0QASouxeGtWLictj+5RxJSvM3hUHy6Uv+bOpHd ATWuH3g6xzARQt+ZfiHlHzgeEq5lGcKi6Hoitod0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Junichi Uekawa , Stefano Garzarella , "Michael S. Tsirkin" , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 195/530] vhost/vsock: Use kvmalloc/kvfree for larger packets. Date: Mon, 24 Oct 2022 13:28:59 +0200 Message-Id: <20221024113053.872840609@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Junichi Uekawa [ Upstream commit 0e3f72931fc47bb81686020cc643cde5d9cd0bb8 ] When copying a large file over sftp over vsock, data size is usually 32kB, and kmalloc seems to fail to try to allocate 32 32kB regions. vhost-5837: page allocation failure: order:4, mode:0x24040c0 Call Trace: [] dump_stack+0x97/0xdb [] warn_alloc_failed+0x10f/0x138 [] ? __alloc_pages_direct_compact+0x38/0xc8 [] __alloc_pages_nodemask+0x84c/0x90d [] alloc_kmem_pages+0x17/0x19 [] kmalloc_order_trace+0x2b/0xdb [] __kmalloc+0x177/0x1f7 [] ? copy_from_iter+0x8d/0x31d [] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock] [] vhost_worker+0xf7/0x157 [vhost] [] kthread+0xfd/0x105 [] ? vhost_dev_set_owner+0x22e/0x22e [vhost] [] ? flush_kthread_worker+0xf3/0xf3 [] ret_from_fork+0x4e/0x80 [] ? flush_kthread_worker+0xf3/0xf3 Work around by doing kvmalloc instead. Fixes: 433fc58e6bf2 ("VSOCK: Introduce vhost_vsock.ko") Signed-off-by: Junichi Uekawa Reviewed-by: Stefano Garzarella Acked-by: Michael S. Tsirkin Link: https://lore.kernel.org/r/20220928064538.667678-1-uekawa@chromium.org Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/vhost/vsock.c | 2 +- net/vmw_vsock/virtio_transport_common.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index dcb1585819a1..97bfe499222b 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -393,7 +393,7 @@ vhost_vsock_alloc_pkt(struct vhost_virtqueue *vq, return NULL; } =20 - pkt->buf =3D kmalloc(pkt->len, GFP_KERNEL); + pkt->buf =3D kvmalloc(pkt->len, GFP_KERNEL); if (!pkt->buf) { kfree(pkt); return NULL; diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio= _transport_common.c index ec2c2afbf0d0..3a12aee33e92 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -1342,7 +1342,7 @@ EXPORT_SYMBOL_GPL(virtio_transport_recv_pkt); =20 void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt) { - kfree(pkt->buf); + kvfree(pkt->buf); kfree(pkt); } EXPORT_SYMBOL_GPL(virtio_transport_free_pkt); --=20 2.35.1