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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 6EA21C2BBD5 for ; Fri, 18 Dec 2020 11:06:09 +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 023D623A62 for ; Fri, 18 Dec 2020 11:06:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 023D623A62 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]:58936 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kqDaK-0006ax-2J for qemu-devel@archiver.kernel.org; Fri, 18 Dec 2020 06:06:08 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:47670) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kqDD1-0003q6-3k for qemu-devel@nongnu.org; Fri, 18 Dec 2020 05:42:03 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:39372) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kqDCz-0004fz-4s for qemu-devel@nongnu.org; Fri, 18 Dec 2020 05:42:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1608288119; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kgnKVQes/+rsc9Qae198nAa6ob5L5drbXnb9PvrTf2g=; b=biA+4QT6j/9efYvutjs+CUIFVG7Y6hoeOnIMZGRwwShcYh8mQnkJfR69uaxRhKn1u/fPjF MldX2p0Opd0XNfN+MskM1sDzCZ4BQuTN8H7vbEHKBQr50y0b+UQqAUbknkSR8qozHvDhHE Y8pbhot7lL3BX1ZsJlYfwCmxLsP3UtQ= 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-563-YobG6np2NMaVMbNVmVF33Q-1; Fri, 18 Dec 2020 05:41:55 -0500 X-MC-Unique: YobG6np2NMaVMbNVmVF33Q-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 16C88800D53; Fri, 18 Dec 2020 10:41:54 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-114-200.ams2.redhat.com [10.36.114.200]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1650D60C15; Fri, 18 Dec 2020 10:41:51 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, aiyutao@huawei.com, peter.maydell@linaro.org, vgoyal@redhat.com, lersek@redhat.com, alex.chen@huawei.com, armbru@redhat.com, tu.guoyi@h3c.com Subject: [PULL 11/15] virtiofsd: Remove useless code about send_notify_iov Date: Fri, 18 Dec 2020 10:41:13 +0000 Message-Id: <20201218104117.199096-12-dgilbert@redhat.com> In-Reply-To: <20201218104117.199096-1-dgilbert@redhat.com> References: <20201218104117.199096-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 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-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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_H3=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: stefanha@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Alex Chen The 'ch' will be NULL in the following stack: send_notify_iov()->fuse_send_msg()->virtio_send_msg(), and this may lead to NULL pointer dereferenced in virtio_send_msg(). But send_notify_iov() was never called, so remove the useless code about send_notify_iov() to fix this problem. Signed-off-by: Alex Chen Message-Id: <20201214121615.29967-1-alex.chen@huawei.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Dr. David Alan Gilbert --- tools/virtiofsd/fuse_lowlevel.c | 98 --------------------------------- 1 file changed, 98 deletions(-) diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c index d4119e92ab..e94b71110b 100644 --- a/tools/virtiofsd/fuse_lowlevel.c +++ b/tools/virtiofsd/fuse_lowlevel.c @@ -2143,104 +2143,6 @@ static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, send_reply_ok(req, NULL, 0); } -static int send_notify_iov(struct fuse_session *se, int notify_code, - struct iovec *iov, int count) -{ - struct fuse_out_header out = { - .error = notify_code, - }; - - if (!se->got_init) { - return -ENOTCONN; - } - - iov[0].iov_base = &out; - iov[0].iov_len = sizeof(struct fuse_out_header); - - return fuse_send_msg(se, NULL, iov, count); -} - -int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph) -{ - if (ph != NULL) { - struct fuse_notify_poll_wakeup_out outarg = { - .kh = ph->kh, - }; - struct iovec iov[2]; - - iov[1].iov_base = &outarg; - iov[1].iov_len = sizeof(outarg); - - return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2); - } else { - return 0; - } -} - -int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino, - off_t off, off_t len) -{ - struct fuse_notify_inval_inode_out outarg = { - .ino = ino, - .off = off, - .len = len, - }; - struct iovec iov[2]; - - if (!se) { - return -EINVAL; - } - - iov[1].iov_base = &outarg; - iov[1].iov_len = sizeof(outarg); - - return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2); -} - -int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent, - const char *name, size_t namelen) -{ - struct fuse_notify_inval_entry_out outarg = { - .parent = parent, - .namelen = namelen, - }; - struct iovec iov[3]; - - if (!se) { - return -EINVAL; - } - - iov[1].iov_base = &outarg; - iov[1].iov_len = sizeof(outarg); - iov[2].iov_base = (void *)name; - iov[2].iov_len = namelen + 1; - - return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3); -} - -int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent, - fuse_ino_t child, const char *name, - size_t namelen) -{ - struct fuse_notify_delete_out outarg = { - .parent = parent, - .child = child, - .namelen = namelen, - }; - struct iovec iov[3]; - - if (!se) { - return -EINVAL; - } - - iov[1].iov_base = &outarg; - iov[1].iov_len = sizeof(outarg); - iov[2].iov_base = (void *)name; - iov[2].iov_len = namelen + 1; - - return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3); -} - int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino, off_t offset, struct fuse_bufvec *bufv) { -- 2.29.2