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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; Received: from AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) by AM5PR0802MB2530.eurprd08.prod.outlook.com (2603:10a6:203:98::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.22; Thu, 19 Nov 2020 16:16:27 +0000 Received: from AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::fd02:1330:f620:1243]) by AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::fd02:1330:f620:1243%9]) with mapi id 15.20.3589.021; Thu, 19 Nov 2020 16:16:27 +0000 Subject: Re: iotest 030 still occasionally intermittently failing From: Vladimir Sementsov-Ogievskiy To: Peter Maydell , Alberto Garcia Cc: QEMU Developers , Qemu-block References: Message-ID: Date: Thu, 19 Nov 2020 19:16:25 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.3 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [185.215.60.89] X-ClientProxiedBy: AM8P192CA0013.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:21b::18) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.100.5] (185.215.60.89) by AM8P192CA0013.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:21b::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.20 via Frontend Transport; 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envelope-from=vsementsov@virtuozzo.com; helo=EUR03-DB5-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/19 11:16:28 X-ACL-Warn: Detected OS = Windows NT kernel [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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 19.11.2020 19:11, Vladimir Sementsov-Ogievskiy wrote: > 16.11.2020 20:59, Peter Maydell wrote: >> On Mon, 16 Nov 2020 at 17:34, Alberto Garcia wrote: >>> Do you know if there is a core dump or stack trace available ? >> >> Nope, sorry. What you get is what the 'vm-build-netbsd' etc targets >> produce, so if you want more diagnostics on failures you have to >> arrange for the test harness to produce them... >> >> thanks >> -- PMM >> > > Hi! > > After some iterations I've reproduced on SIGABRT: > > #0  0x00007feb701bae35 in raise () at /lib64/libc.so.6 > #1  0x00007feb701a5895 in abort () at /lib64/libc.so.6 > #2  0x00007feb701a5769 in _nl_load_domain.cold () at /lib64/libc.so.6 > #3  0x00007feb701b3566 in annobin_assert.c_end () at /lib64/libc.so.6 > #4  0x000055a93374f7d3 in bdrv_replace_child (child=0x55a9363a3a00, new_bs=0x0) at ../block.c:2648 > #5  0x000055a93374fd5a in bdrv_detach_child (child=0x55a9363a3a00) at ../block.c:2777 > #6  0x000055a93374fd9c in bdrv_root_unref_child (child=0x55a9363a3a00) at ../block.c:2789 > #7  0x000055a933722e8b in block_job_remove_all_bdrv (job=0x55a935f4f4b0) at ../blockjob.c:191 > #8  0x000055a933722bb2 in block_job_free (job=0x55a935f4f4b0) at ../blockjob.c:88 > #9  0x000055a9337755fa in job_unref (job=0x55a935f4f4b0) at ../job.c:380 > #10 0x000055a9337767a6 in job_exit (opaque=0x55a935f4f4b0) at ../job.c:894 > #11 0x000055a93386037e in aio_bh_call (bh=0x55a9352e16b0) at ../util/async.c:136 > #12 0x000055a933860488 in aio_bh_poll (ctx=0x55a9351366f0) at ../util/async.c:164 > #13 0x000055a93383151e in aio_dispatch (ctx=0x55a9351366f0) at ../util/aio-posix.c:381 > #14 0x000055a9338608b9 in aio_ctx_dispatch (source=0x55a9351366f0, callback=0x0, user_data=0x0) >     at ../util/async.c:306 > #15 0x00007feb71349ecd in g_main_context_dispatch () at /lib64/libglib-2.0.so.0 > #16 0x000055a933840300 in glib_pollfds_poll () at ../util/main-loop.c:221 > #17 0x000055a93384037a in os_host_main_loop_wait (timeout=0) at ../util/main-loop.c:244 > #18 0x000055a933840482 in main_loop_wait (nonblocking=0) at ../util/main-loop.c:520 > #19 0x000055a933603979 in qemu_main_loop () at ../softmmu/vl.c:1678 > #20 0x000055a933190046 in main (argc=20, argv=0x7ffd48c31138, envp=0x7ffd48c311e0) > > (gdb) fr 4 > #4  0x000055a93374f7d3 in bdrv_replace_child (child=0x55a9363a3a00, new_bs=0x0) at ../block.c:2648 > 2648            assert(tighten_restrictions == false); > (gdb) list > 2643            int ret; > 2644 > 2645            bdrv_get_cumulative_perm(old_bs, &perm, &shared_perm); > 2646            ret = bdrv_check_perm(old_bs, NULL, perm, shared_perm, NULL, > 2647                                  &tighten_restrictions, NULL); > 2648            assert(tighten_restrictions == false); > 2649            if (ret < 0) { > 2650                /* We only tried to loosen restrictions, so errors are not fatal */ > 2651                bdrv_abort_perm_update(old_bs); > 2652            } else { > (gdb) p tighten_restrictions > $1 = true > > > Hm. it seems that the problem is that tighten_restrictions is not initialized. I'll send a patch. > wrong, bdrv_check_perm initializes it correctly.. I'll look more careful. -- Best regards, Vladimir