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 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 55B3DC433E0 for ; Tue, 9 Mar 2021 19:59:31 +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 C79EE64F64 for ; Tue, 9 Mar 2021 19:59:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C79EE64F64 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]:59834 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lJiVt-0003Dq-Tg for qemu-devel@archiver.kernel.org; Tue, 09 Mar 2021 14:59:29 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:38372) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJgGE-0006Lq-FL for qemu-devel@nongnu.org; Tue, 09 Mar 2021 12:35:13 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:52299) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lJgGA-0005rq-4T for qemu-devel@nongnu.org; Tue, 09 Mar 2021 12:35:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615311304; 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; bh=2CrmU62ozq80Fd+S/jOJxexIiH/pWOvihZ4sbtDF95M=; b=ZlgcmSqn6JadK5i7wFwGNj4ACFQ9yljhSSUJXHTwsyMbkmTlqEbeD9O/BHiK86FwaLZf0G Di9yMnSeGrNF7MFfS++1QWXrD3lmHRdvZEe6gcqbjCJmGLQWKL78dCFEESYQrXASRfKiNc rSIJwaukK+8J23HqEfcxtbms1FmGI3g= 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-20-6IyflFeFMUCUKnIDzLkpEQ-1; Tue, 09 Mar 2021 12:34:58 -0500 X-MC-Unique: 6IyflFeFMUCUKnIDzLkpEQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 351AB800D62; Tue, 9 Mar 2021 17:34:57 +0000 (UTC) Received: from merkur.redhat.com (ovpn-114-169.ams2.redhat.com [10.36.114.169]) by smtp.corp.redhat.com (Postfix) with ESMTP id 063335C266; Tue, 9 Mar 2021 17:34:55 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH] stream: Don't crash when node permission is denied Date: Tue, 9 Mar 2021 18:34:51 +0100 Message-Id: <20210309173451.45152-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@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=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.251, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: kwolf@redhat.com, ngu@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The image streaming block job restricts shared permissions of the nodes it accesses. This can obviously fail when other users already got these permissions. &error_abort is therefore wrong and can crash. Handle these errors gracefully and just fail starting the block job. Reported-by: Nini Gu Signed-off-by: Kevin Wolf --- Based-on: 20210309121814.31078-1-kwolf@redhat.com ('storage-daemon: Call job_cancel_sync_all() on shutdown') block/stream.c | 15 +++++++++++---- tests/qemu-iotests/tests/qsd-jobs | 20 ++++++++++++++++++++ tests/qemu-iotests/tests/qsd-jobs.out | 10 ++++++++++ 3 files changed, 41 insertions(+), 4 deletions(-) diff --git a/block/stream.c b/block/stream.c index 1fa742b0db..97bee482dc 100644 --- a/block/stream.c +++ b/block/stream.c @@ -206,7 +206,7 @@ void stream_start(const char *job_id, BlockDriverState *bs, const char *filter_node_name, Error **errp) { - StreamBlockJob *s; + StreamBlockJob *s = NULL; BlockDriverState *iter; bool bs_read_only; int basic_flags = BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED; @@ -214,6 +214,7 @@ void stream_start(const char *job_id, BlockDriverState *bs, BlockDriverState *cor_filter_bs = NULL; BlockDriverState *above_base; QDict *opts; + int ret; assert(!(base && bottom)); assert(!(backing_file_str && bottom)); @@ -303,7 +304,7 @@ void stream_start(const char *job_id, BlockDriverState *bs, * queried only at the job start and then cached. */ if (block_job_add_bdrv(&s->common, "active node", bs, 0, - basic_flags | BLK_PERM_WRITE, &error_abort)) { + basic_flags | BLK_PERM_WRITE, errp)) { goto fail; } @@ -320,8 +321,11 @@ void stream_start(const char *job_id, BlockDriverState *bs, for (iter = bdrv_filter_or_cow_bs(bs); iter != base; iter = bdrv_filter_or_cow_bs(iter)) { - block_job_add_bdrv(&s->common, "intermediate node", iter, 0, - basic_flags, &error_abort); + ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0, + basic_flags, errp); + if (ret < 0) { + goto fail; + } } s->base_overlay = base_overlay; @@ -337,6 +341,9 @@ void stream_start(const char *job_id, BlockDriverState *bs, return; fail: + if (s) { + job_early_fail(&s->common.job); + } if (cor_filter_bs) { bdrv_cor_filter_drop(cor_filter_bs); } diff --git a/tests/qemu-iotests/tests/qsd-jobs b/tests/qemu-iotests/tests/qsd-jobs index 1a1c534fac..972b6b3898 100755 --- a/tests/qemu-iotests/tests/qsd-jobs +++ b/tests/qemu-iotests/tests/qsd-jobs @@ -30,6 +30,7 @@ status=1 # failure is the default! _cleanup() { _cleanup_test_img + rm -f "$SOCK_DIR/nbd.sock" } trap "_cleanup; exit \$status" 0 1 2 3 15 @@ -59,6 +60,25 @@ $QSD --chardev stdio,id=stdio --monitor chardev=stdio \ {"execute": "quit"} EOF +echo +echo "=== Streaming can't get permission on base node ===" +echo + +# Just make sure that this doesn't crash +$QSD --chardev stdio,id=stdio --monitor chardev=stdio \ + --blockdev node-name=file_base,driver=file,filename="$TEST_IMG.base" \ + --blockdev node-name=fmt_base,driver=qcow2,file=file_base \ + --blockdev node-name=file_overlay,driver=file,filename="$TEST_IMG" \ + --blockdev node-name=fmt_overlay,driver=qcow2,file=file_overlay,backing=fmt_base \ + --nbd-server addr.type=unix,addr.path="$SOCK_DIR/nbd.sock" \ + --export type=nbd,id=export1,node-name=fmt_base,writable=on,name=export1 \ + <