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=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 508EEC433E2 for ; Wed, 9 Sep 2020 05:47:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1003821941 for ; Wed, 9 Sep 2020 05:47:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599630473; bh=htQKs8aT0sv2Xdnv2ZU3mxFjzn787y9CQFqvsT7Wigo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=L5b+RLqWMnzHaywGZr1U3ylv5nfgjl0wF53N7J8V9cLDLZOxT283k0YV04Dpt1Vn8 ruQ5eBEk+lTUjUELj641V9ACihSKJHM0och5DP1GDFklBv7vat862SGEx+NMrbrkwl i5uR7Q2RzoliOAeNQyK5y+iGXIBP05OrcnRiFSxk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726976AbgIIFrw (ORCPT ); Wed, 9 Sep 2020 01:47:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:60470 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725772AbgIIFrv (ORCPT ); Wed, 9 Sep 2020 01:47:51 -0400 Received: from devnote2 (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A985421582; Wed, 9 Sep 2020 05:47:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599630471; bh=htQKs8aT0sv2Xdnv2ZU3mxFjzn787y9CQFqvsT7Wigo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=bMteSw8Q1Y2fn1AM808IaDzjunVhVNbu2K05xTmvpjIxQnIGMdWIR84TyC/n9AYgs RGz9+Wjifg+CHp5xwj9XPBgnSDonLf7HdEXlkpamXp/+g6ZB7lWFnXFUgtNdMDeK5M +JnzOOyHRJw8iuw7zT/MhkvZQgcfodbRabvQypfI= Date: Wed, 9 Sep 2020 14:47:45 +0900 From: Masami Hiramatsu To: Naresh Kamboju Cc: Linux-Next Mailing List , open list , lkft-triage@lists.linaro.org, jbaron@akamai.com, Steven Rostedt , Ingo Molnar , Masami Hiramatsu , jim.cromie@gmail.com, Joe Lawrence , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek Subject: Re: kernel BUG at /usr/src/kernel/lib/dynamic_debug.c:267! Message-Id: <20200909144745.504c4cbfeea9bc298e3c6b9b@kernel.org> In-Reply-To: References: X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Naresh, Thanks for reporting, it seems that you have run the kselftests/livepatch/test-livepatch.sh. Then, I think it is better to report to Livepatch maintainers too. (I Cc'd them) Thank you, On Wed, 9 Sep 2020 10:24:09 +0530 Naresh Kamboju wrote: > While testing livepatch test cases on x86_64 with Linux next 20200908 tag kernel > this kernel BUG noticed several times. > > metadata: > git branch: master > git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git commit: dff9f829e5b0181d4ed9d35aa62d695292399b54 > git describe: next-20200908 > kernel-config: > http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-next/853/config > > kernel BUG log, > ---------------------- > [ 634.063970] % rmmod test_klp_livepatch > [ 634.114787] test_klp_atomic_replace: this has been live patched > [ 634.121953] % echo 0 > /sys/kernel/livepatch/test_klp_atomic_replace/enabled > [ 634.129391] livepatch: 'test_klp_atomic_replace': starting > unpatching transition > [ 634.143990] livepatch: 'test_klp_atomic_replace': unpatching complete > [ 634.156223] % rmmod test_klp_atomic_replace > [ 634.235451] ------------[ cut here ]------------ > [ 634.240314] kernel BUG at /usr/src/kernel/lib/dynamic_debug.c:267! > [ 634.246584] invalid opcode: 0000 [#1] SMP PTI > [ 634.250955] CPU: 0 PID: 12791 Comm: test-livepatch. Tainted: G > W K 5.9.0-rc4-next-20200908 #1 > [ 634.260615] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS > 2.2 05/23/2018 > [ 634.268007] RIP: 0010:ddebug_exec_query+0x77b/0xb90 > [ 634.272886] Code: 4c 89 ad 70 ff ff ff e9 db fb ff ff b8 03 00 00 > 00 e9 20 fb ff ff b8 02 00 00 00 e9 16 fb ff ff b8 01 00 00 00 e9 0c > fb ff ff <0f> 0b 31 c0 e9 03 fb ff ff 49 89 f4 48 89 f7 e9 78 f9 ff ff > 8b 15 > [ 634.291630] RSP: 0018:ffff9f0c80a5bd18 EFLAGS: 00010246 > [ 634.296856] RAX: 000000000000003d RBX: 0000000000000000 RCX: 0000000000000000 > [ 634.303987] RDX: 000000000000003d RSI: 0000000000000000 RDI: ffff90db906583ec > [ 634.311111] RBP: ffff9f0c80a5bde8 R08: 000000000000000a R09: 000000000000003b > [ 634.318236] R10: ffff90db92610000 R11: 0000000000000246 R12: ffff90db906583ec > [ 634.325368] R13: ffffffffbe87cbc0 R14: 0000000000000000 R15: 0000000000000004 > [ 634.332500] FS: 00007fd37249a740(0000) GS:ffff90dbefa00000(0000) > knlGS:0000000000000000 > [ 634.340578] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 634.346315] CR2: 0000000000e6d00c CR3: 000000026a4b8004 CR4: 00000000003706f0 > [ 634.353446] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 634.360570] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ 634.367693] Call Trace: > [ 634.370139] ? lock_acquire+0xa6/0x390 > [ 634.373892] ? __might_fault+0x34/0x80 > [ 634.377648] ddebug_exec_queries+0x6e/0x140 > [ 634.381831] ddebug_proc_write+0x4b/0xa0 > [ 634.385756] full_proxy_write+0x5f/0x90 > [ 634.389595] vfs_write+0xed/0x240 > [ 634.392915] ksys_write+0xad/0xf0 > [ 634.396233] ? syscall_trace_enter+0x17a/0x240 > [ 634.400670] __x64_sys_write+0x1a/0x20 > [ 634.404416] do_syscall_64+0x37/0x50 > [ 634.407993] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 634.413038] RIP: 0033:0x7fd371b84144 > [ 634.416617] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 > 00 00 00 00 66 90 48 8d 05 c1 e7 2c 00 8b 00 85 c0 75 13 b8 01 00 00 > 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89 > f5 53 > [ 634.435362] RSP: 002b:00007ffd19447658 EFLAGS: 00000246 ORIG_RAX: > 0000000000000001 > [ 634.442928] RAX: ffffffffffffffda RBX: 00000000000000bc RCX: 00007fd371b84144 > [ 634.450059] RDX: 00000000000000bc RSI: 0000000000e6cf70 RDI: 0000000000000001 > [ 634.457181] RBP: 0000000000e6cf70 R08: 00000000000000e9 R09: 0000000000000000 > [ 634.464305] R10: 00007ffd19447c48 R11: 0000000000000246 R12: 00007fd371e4e760 > [ 634.471429] R13: 00000000000000bc R14: 00007fd371e49760 R15: 00000000000000bc > [ 634.478559] Modules linked in: trace_printk sch_fq 8021q > iptable_filter xt_mark ip_tables cls_bpf sch_ingress veth algif_hash > x86_pkg_temp_thermal fuse [last unloaded: test_klp_atomic_replace] > [ 634.495695] ---[ end trace d04d7e11bd1458bf ]--- > [ 634.500333] RIP: 0010:ddebug_exec_query+0x77b/0xb90 > [ 634.505218] Code: 4c 89 ad 70 ff ff ff e9 db fb ff ff b8 03 00 00 > 00 e9 20 fb ff ff b8 02 00 00 00 e9 16 fb ff ff b8 01 00 00 00 e9 0c > fb ff ff <0f> 0b 31 c0 e9 03 fb ff ff 49 89 f4 48 89 f7 e9 78 f9 ff ff > 8b 15 > [ 634.523969] RSP: 0018:ffff9f0c80a5bd18 EFLAGS: 00010246 > [ 634.529197] RAX: 000000000000003d RBX: 0000000000000000 RCX: 0000000000000000 > [ 634.536330] RDX: 000000000000003d RSI: 0000000000000000 RDI: ffff90db906583ec > [ 634.543462] RBP: ffff9f0c80a5bde8 R08: 000000000000000a R09: 000000000000003b > [ 634.550593] R10: ffff90db92610000 R11: 0000000000000246 R12: ffff90db906583ec > [ 634.557727] R13: ffffffffbe87cbc0 R14: 0000000000000000 R15: 0000000000000004 > [ 634.564869] FS: 00007fd37249a740(0000) GS:ffff90dbefa00000(0000) > knlGS:0000000000000000 > [ 634.572953] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 634.578699] CR2: 0000000000e6d00c CR3: 000000026a4b8004 CR4: 00000000003706f0 > [ 634.585829] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 634.592964] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > full test log, > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20200908/testrun/3171064/suite/linux-log-parser/test/check-kernel-bug-1743477/log > > -- > Linaro LKFT > https://lkft.linaro.org -- Masami Hiramatsu