From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2B3CC388F9 for ; Wed, 11 Nov 2020 20:05:03 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 09B2A207F7 for ; Wed, 11 Nov 2020 20:05:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="a5Ci+Lyq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 09B2A207F7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42114 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kcwMX-000550-EV for qemu-devel@archiver.kernel.org; Wed, 11 Nov 2020 15:05:01 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:39572) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kcwGw-0002ou-C0 for qemu-devel@nongnu.org; Wed, 11 Nov 2020 14:59:14 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:34263) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kcwGu-0008OF-M7 for qemu-devel@nongnu.org; Wed, 11 Nov 2020 14:59:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605124751; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=PDMNnCOqCd2jmGnI31jxtGoVcODhJlNr04fs4O3B9Wg=; b=a5Ci+LyqNRjPziosrAgRPylMyJG0uTCGu7wqZ+p3ddjhowF2k360MhRd223H1V/SINpc4T r9fUoTjAXfI2QFhfY2brwGIMY9+TaIM3oW5+OZnbGQdYVs++gliMP3oyKue2ZgRtU5V6ab g5rH7x62s0d5jQxmBJI8pVC8VMJRbEA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-375-MGPqi6PDMYCLmjatzyRAxA-1; Wed, 11 Nov 2020 14:59:09 -0500 X-MC-Unique: MGPqi6PDMYCLmjatzyRAxA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D4CFA1009456; Wed, 11 Nov 2020 19:59:08 +0000 (UTC) Received: from work-vm (ovpn-113-88.ams2.redhat.com [10.36.113.88]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1720C27BD8; Wed, 11 Nov 2020 19:59:03 +0000 (UTC) Date: Wed, 11 Nov 2020 19:59:01 +0000 From: "Dr. David Alan Gilbert" To: Haotian Li Subject: Re: [Virtio-fs] [PATCH 1/3] tools/virtiofsd/buffer.c: check whether buf is NULL in fuse_bufvec_advance func Message-ID: <20201111195901.GQ3232@work-vm> References: <3477d902-ace9-1aa1-531a-9d20d6e93a05@huawei.com> <29fc87c2-b87c-4c34-40d4-75381f228849@huawei.com> MIME-Version: 1.0 In-Reply-To: <29fc87c2-b87c-4c34-40d4-75381f228849@huawei.com> User-Agent: Mutt/1.14.6 (2020-07-11) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/11 01:49:01 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: virtio-fs@redhat.com, linfeilong@huawei.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Haotian Li (lihaotian9@huawei.com) wrote: > In fuse_bufvec_advance func, calling fuse_bufvec_current func > may return NULL, so we should check whether buf is NULL before > using it. > > Signed-off-by: Haotian Li > Signed-off-by: Zhiqiang Liu > --- > tools/virtiofsd/buffer.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/tools/virtiofsd/buffer.c b/tools/virtiofsd/buffer.c > index 27c1377f22..bdc608c221 100644 > --- a/tools/virtiofsd/buffer.c > +++ b/tools/virtiofsd/buffer.c > @@ -246,6 +246,10 @@ static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len) > { > const struct fuse_buf *buf = fuse_bufvec_current(bufv); > > + if (!buf) { > + return 0; > + } > + Reviewed-by: Dr. David Alan Gilbert > bufv->off += len; > assert(bufv->off <= buf->size); > if (bufv->off == buf->size) { > -- > > _______________________________________________ > Virtio-fs mailing list > Virtio-fs@redhat.com > https://www.redhat.com/mailman/listinfo/virtio-fs -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK