Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp887199pxb; Wed, 27 Oct 2021 14:29:50 -0700 (PDT) X-Google-Smtp-Source: ABdhPJye23a14BLQbpZqhsNEHfZjRyTTslVGChBgRV4abfc9stEWSywD0hJXA8zVsTM4KVxgnITl X-Received: by 2002:a05:6402:7:: with SMTP id d7mr459291edu.265.1635370190301; Wed, 27 Oct 2021 14:29:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1635370190; cv=none; d=google.com; s=arc-20160816; b=ByQWMkTE0fv51l/RyYZY/fsHpcfYuU/B0+5l+e2MdDzNu2mOJEJP8dQMDeOfnggugV 7zk7LuBfvXUlVok1n+LHcOOnCvjAZypoKZUpWLitNOC8mq5jRZnyDT5ssf+pj6WzCCvz 3KyW+5frijOEyUjyTajF6rweZbWJ1yHsgotx3UStKnCSipIW+3JKDPTXUgRnEONqzseY pEVBYxqb4r6pBNPDUevF3rmQrVl9uSca+UUqQXqIXxtkoqQ3CnIyarHRT/GKdOjgv78J kiEuifUCYmmad5BsnsbA5zi/37uoN3GN7g46CFYIrmRoenA0jdiYxIwrJnDesNUwAihb w8FQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:cc:to:subject :message-id:date:from:reply-to:in-reply-to:references:mime-version :dkim-signature; bh=iLPWDxio6Ncq8Pgnw6KyT+0L9VRKZzSoe4C6ccWnKA4=; b=URUL8SAj4bKRHK3g2K0fdJg9XURP6FpCC5TqwY6gFkagKQn1O5mjwT8U3bldqNVGWP hg/XZOcOqjps4x9gomtOVwCFRpqCMhYHeljbr94qCXC6qOKfcLZvYvEo4T4QXqNEqTS9 jIwQDAMmLOdItVIumd0XJAVMX5g7CgxRA6Mnr3qDxa3s8aZRNT7E4nr8m+R+vAYktDRZ s+2GGQGuqGIuXuCgAl8ZyKuXonRUCBX5v1HoFGN65dlt3CNkquKiq2jxMAIR2I00DtrG 6PYDBYBziav5XCxeVY8vLjr0HQRboIUDgq5yjM1tG9Lg39eKLG0lvL1c/Y/8mr7dr2Uq jdfQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=cRHStyOl; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id qb4si1433827ejc.749.2021.10.27.14.29.26; Wed, 27 Oct 2021 14:29:50 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=cRHStyOl; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238546AbhJ0Pho (ORCPT + 97 others); Wed, 27 Oct 2021 11:37:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237820AbhJ0Phk (ORCPT ); Wed, 27 Oct 2021 11:37:40 -0400 Received: from mail-qv1-xf34.google.com (mail-qv1-xf34.google.com [IPv6:2607:f8b0:4864:20::f34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC111C061745; Wed, 27 Oct 2021 08:35:14 -0700 (PDT) Received: by mail-qv1-xf34.google.com with SMTP id d6so2037736qvb.3; Wed, 27 Oct 2021 08:35:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc:content-transfer-encoding; bh=iLPWDxio6Ncq8Pgnw6KyT+0L9VRKZzSoe4C6ccWnKA4=; b=cRHStyOlxYN9LpRWypU8LG22C2XAQDw9eo6/Nn7jzu55ZAmMt8yCFcI+xScZmt8aAb W4UTGs/P48Ek3sfdXfypqoIa/DQRKYcjP0EfdvIrT3hdO+RyTCkvZGJgCzBCS8FLH3lg MKu3kyeiHqtGZYG+YTM9wVqL8Gz7BdtB5+E50GDyttFvURaaBJr4KIlV3dkG+821MQvx SIoj4khNzqLlIPemzDzfS/typPZVEWM/3d1LjBcxbfZxBcuTn6fkvpUjZAQOeY+P/Myj UIsbM9h5JM+jFOPnnS/xN2EdRiTBVyBJxOdlJ4/4fqYn1XKssu8YQN3l6rEIERJvR4qr Oa7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc:content-transfer-encoding; bh=iLPWDxio6Ncq8Pgnw6KyT+0L9VRKZzSoe4C6ccWnKA4=; b=xbF6QcC5eDGPOASyRBYwlNwo/QZhTQGcAotXT4Ywvnyc9bpYNkWnjGnNRRTw9raP5Z /Ys5oTRlSCgVbhZsIwsipzPSYB0DXtVT6ry97gP7nc2T5Hg9HBVWPvppBre1YcFp4AIF 8oRgJoL0PCjxDCL99QgKVBWvaMNG0lu4MBgaYEEYDG+Le7Ktc3fH3w70WXFOgiLZYFCC SFyfwH/h2eQYgtTBjIK5uivtvP3NPF87vrGsPrJepXgXwYEoceAbOk57mixKrSaDsbKY G/kVjn4WLAnkt+ym4u7v6oJwE7vLYu1I8iGw0WwzV56JPGuQnp/9fEq3vpxXR/Wqm9j7 IGXA== X-Gm-Message-State: AOAM530M4WqbMpMjNWL67uBVJTf7bGFyY1iedyowy9shA3q2JSovAyF7 7GFHKdcoYadjbPOgN+59Mh+qyXW+nku/4SRbp67BYpYR3vw= X-Received: by 2002:ad4:5ba2:: with SMTP id 2mr16389372qvq.41.1635348913827; Wed, 27 Oct 2021 08:35:13 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Reply-To: fdmanana@gmail.com From: Filipe Manana Date: Wed, 27 Oct 2021 16:34:37 +0100 Message-ID: Subject: Re: INFO: task hung in btrfs_search_slot To: Hao Sun Cc: Chris Mason , David Sterba , Josef Bacik , linux-btrfs , Qu Wenruo , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 27, 2021 at 2:08 PM Hao Sun wrote: > > Hello, > > When using Healer to fuzz the latest Linux kernel, the following crash > was triggered. This is the same deadlock you reported 3 weeks ago here: https://lore.kernel.org/linux-btrfs/CACkBjsax51i4mu6C0C3vJqQN3NR_iVuucoeG3U= 1HXjrgzn5FFQ@mail.gmail.com/ There's a fix in the integration branch (David's misc-next branch), but it's not yet in any released kernel and not in Linus' tree as well: https://lore.kernel.org/linux-btrfs/cover.1634115580.git.fdmanana@suse.com/ Thanks. > > HEAD commit: 519d81956ee2 Linux 5.15-rc6 > git tree: upstream > console output: > https://drive.google.com/file/d/1SFUNYlZ6tpKe9gvGXKAezMNUFOOjFFiA/view?us= p=3Dsharing > kernel config: https://drive.google.com/file/d/12PUnxIM1EPBgW4ZJmI7WJBRaY= 1lA83an/view?usp=3Dsharing > > Sorry, I don't have a reproducer for this crash, hope the symbolized > report can help. > If you fix this issue, please add the following tag to the commit: > Reported-by: Hao Sun > > INFO: task kworker/u9:4:1175 blocked for more than 143 seconds. > Not tainted 5.15.0-rc6 #4 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:kworker/u9:4 state:D stack:23384 pid: 1175 ppid: 2 flags:0x00004000 > Workqueue: events_unbound btrfs_async_reclaim_data_space > Call Trace: > context_switch kernel/sched/core.c:4940 [inline] > __schedule+0xcd9/0x2530 kernel/sched/core.c:6287 > schedule+0xd3/0x270 kernel/sched/core.c:6366 > rwsem_down_read_slowpath+0x4ee/0x9d0 kernel/locking/rwsem.c:993 > __down_read_common kernel/locking/rwsem.c:1214 [inline] > __down_read kernel/locking/rwsem.c:1223 [inline] > down_read_nested+0xe6/0x440 kernel/locking/rwsem.c:1590 > __btrfs_tree_read_lock+0x31/0x350 fs/btrfs/locking.c:47 > btrfs_tree_read_lock fs/btrfs/locking.c:54 [inline] > btrfs_read_lock_root_node+0x8a/0x320 fs/btrfs/locking.c:191 > btrfs_search_slot_get_root fs/btrfs/ctree.c:1623 [inline] > btrfs_search_slot+0x13b4/0x2140 fs/btrfs/ctree.c:1728 > btrfs_update_device+0x11f/0x500 fs/btrfs/volumes.c:2794 > btrfs_chunk_alloc_add_chunk_item+0x34d/0xea0 fs/btrfs/volumes.c:5504 > do_chunk_alloc fs/btrfs/block-group.c:3408 [inline] > btrfs_chunk_alloc+0x84d/0xf50 fs/btrfs/block-group.c:3653 > flush_space+0x54e/0xd80 fs/btrfs/space-info.c:670 > btrfs_async_reclaim_data_space+0x1b8/0x560 fs/btrfs/space-info.c:1168 > process_one_work+0x9df/0x16d0 kernel/workqueue.c:2297 > worker_thread+0x90/0xed0 kernel/workqueue.c:2444 > kthread+0x3e5/0x4d0 kernel/kthread.c:319 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 > INFO: task syz-executor:7761 blocked for more than 143 seconds. > Not tainted 5.15.0-rc6 #4 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor state:D stack:22264 pid: 7761 ppid: 6595 flags:0x000040= 04 > Call Trace: > context_switch kernel/sched/core.c:4940 [inline] > __schedule+0xcd9/0x2530 kernel/sched/core.c:6287 > schedule+0xd3/0x270 kernel/sched/core.c:6366 > btrfs_commit_transaction+0x1f84/0x2e90 fs/btrfs/transaction.c:2174 > btrfs_sync_file+0xd14/0x12a0 fs/btrfs/file.c:2297 > vfs_fsync_range+0x13a/0x220 fs/sync.c:200 > generic_write_sync include/linux/fs.h:2955 [inline] > btrfs_file_write_iter+0xa3a/0xe30 fs/btrfs/file.c:2033 > call_write_iter include/linux/fs.h:2163 [inline] > do_iter_readv_writev+0x47b/0x750 fs/read_write.c:729 > do_iter_write fs/read_write.c:855 [inline] > do_iter_write+0x18b/0x700 fs/read_write.c:836 > vfs_iter_write+0x70/0xa0 fs/read_write.c:896 > iter_file_splice_write+0x723/0xbf0 fs/splice.c:689 > do_splice_from fs/splice.c:767 [inline] > direct_splice_actor+0x110/0x180 fs/splice.c:936 > splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 > do_splice_direct+0x1b3/0x280 fs/splice.c:979 > do_sendfile+0xab6/0x1240 fs/read_write.c:1249 > __do_sys_sendfile64 fs/read_write.c:1308 [inline] > __se_sys_sendfile64 fs/read_write.c:1300 [inline] > __x64_sys_sendfile64+0x149/0x210 fs/read_write.c:1300 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x7f75f1b61c4d > RSP: 002b:00007f75ef0a8c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 > RAX: ffffffffffffffda RBX: 00007f75f1c88158 RCX: 00007f75f1b61c4d > RDX: 0000000020006c80 RSI: 0000000000000003 RDI: 0000000000000003 > RBP: 00007f75f1bdad80 R08: 0000000000000000 R09: 0000000000000000 > R10: 00008080ffffff80 R11: 0000000000000246 R12: 00007f75f1c88158 > R13: 00007ffe952bc34f R14: 00007ffe952bc4f0 R15: 00007f75ef0a8dc0 > INFO: task syz-executor:7762 blocked for more than 143 seconds. > Not tainted 5.15.0-rc6 #4 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor state:D stack:23248 pid: 7762 ppid: 6595 flags:0x000040= 04 > Call Trace: > context_switch kernel/sched/core.c:4940 [inline] > __schedule+0xcd9/0x2530 kernel/sched/core.c:6287 > schedule+0xd3/0x270 kernel/sched/core.c:6366 > schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 > __mutex_lock_common kernel/locking/mutex.c:669 [inline] > __mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729 > btrfs_chunk_alloc+0x31a/0xf50 fs/btrfs/block-group.c:3631 > find_free_extent_update_loop fs/btrfs/extent-tree.c:3986 [inline] > find_free_extent+0x25cb/0x3a30 fs/btrfs/extent-tree.c:4335 > btrfs_reserve_extent+0x1f1/0x500 fs/btrfs/extent-tree.c:4415 > btrfs_alloc_tree_block+0x203/0x1120 fs/btrfs/extent-tree.c:4813 > __btrfs_cow_block+0x412/0x1620 fs/btrfs/ctree.c:415 > btrfs_cow_block+0x2f6/0x8c0 fs/btrfs/ctree.c:570 > btrfs_search_slot+0x1094/0x2140 fs/btrfs/ctree.c:1768 > relocate_tree_block fs/btrfs/relocation.c:2694 [inline] > relocate_tree_blocks+0xf73/0x1770 fs/btrfs/relocation.c:2757 > relocate_block_group+0x47e/0xc70 fs/btrfs/relocation.c:3673 > btrfs_relocate_block_group+0x48a/0xc60 fs/btrfs/relocation.c:4070 > btrfs_relocate_chunk+0x96/0x280 fs/btrfs/volumes.c:3181 > __btrfs_balance fs/btrfs/volumes.c:3911 [inline] > btrfs_balance+0x1f03/0x3cd0 fs/btrfs/volumes.c:4301 > btrfs_ioctl_balance+0x61e/0x800 fs/btrfs/ioctl.c:4137 > btrfs_ioctl+0x39ea/0x7b70 fs/btrfs/ioctl.c:4949 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:874 [inline] > __se_sys_ioctl fs/ioctl.c:860 [inline] > __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x7f75f1b61c4d > RSP: 002b:00007f75ef087c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f75f1c88210 RCX: 00007f75f1b61c4d > RDX: 0000000000000000 RSI: 000000005000940c RDI: 0000000000000003 > RBP: 00007f75f1bdad80 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75f1c88210 > R13: 00007ffe952bc34f R14: 00007ffe952bc4f0 R15: 00007f75ef087dc0 > INFO: task syz-executor:7763 blocked for more than 143 seconds. > Not tainted 5.15.0-rc6 #4 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor state:D stack:27944 pid: 7763 ppid: 6595 flags:0x000040= 04 > Call Trace: > context_switch kernel/sched/core.c:4940 [inline] > __schedule+0xcd9/0x2530 kernel/sched/core.c:6287 > schedule+0xd3/0x270 kernel/sched/core.c:6366 > wait_current_trans+0x308/0x430 fs/btrfs/transaction.c:534 > start_transaction+0x100d/0x1730 fs/btrfs/transaction.c:676 > btrfs_create+0x111/0x630 fs/btrfs/inode.c:6775 > lookup_open+0xfae/0x13a0 fs/namei.c:3282 > open_last_lookups fs/namei.c:3352 [inline] > path_openat+0xa93/0x2710 fs/namei.c:3558 > do_filp_open+0x1c1/0x290 fs/namei.c:3588 > do_sys_openat2+0x61b/0x9a0 fs/open.c:1200 > do_sys_open+0xc3/0x140 fs/open.c:1216 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x7f75f1b61c4d > RSP: 002b:00007f75ef066c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 > RAX: ffffffffffffffda RBX: 00007f75f1c882c8 RCX: 00007f75f1b61c4d > RDX: 000000000000011b RSI: 0000000000141042 RDI: 0000000020005940 > RBP: 00007f75f1bdad80 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75f1c882c8 > R13: 00007ffe952bc34f R14: 00007ffe952bc4f0 R15: 00007f75ef066dc0 > INFO: lockdep is turned off. > NMI backtrace for cpu 2 > CPU: 2 PID: 39 Comm: khungtaskd Not tainted 5.15.0-rc6 #4 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.13.0-1ubuntu1.1 04/01/2014 > Call Trace: > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 > nmi_trigger_cpumask_backtrace+0x1e1/0x220 lib/nmi_backtrace.c:62 > trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] > check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] > watchdog+0xcc8/0x1010 kernel/hung_task.c:295 > kthread+0x3e5/0x4d0 kernel/kthread.c:319 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 > Sending NMI from CPU 2 to CPUs 0-1,3: > NMI backtrace for cpu 3 > CPU: 3 PID: 3016 Comm: systemd-journal Not tainted 5.15.0-rc6 #4 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.13.0-1ubuntu1.1 04/01/2014 > RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:45 [inline] > RIP: 0010:unwind_next_frame+0x1034/0x1770 arch/x86/kernel/unwind_orc.c:60= 4 > Code: 8e 98 03 00 00 41 39 2e 0f 85 8f 00 00 00 48 b8 00 00 00 00 00 > fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 0f 85 a6 03 00 00 <49> 8d > 7e 08 49 8b 6e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 > RSP: 0018:ffffc900017df608 EFLAGS: 00000246 > RAX: dffffc0000000000 RBX: 1ffff920002fbec9 RCX: 1ffff920002fbee8 > RDX: 1ffff920002fbee7 RSI: ffffc900017dff48 RDI: ffffc900017dff48 > RBP: 0000000000000001 R08: ffffffff8e7f1bdc R09: 0000000000000001 > R10: ffffc900017df75f R11: 0000000000086088 R12: ffffc900017dff58 > R13: ffffc900017df735 R14: ffffc900017df700 R15: ffffc900017df734 > FS: 00007f1d8194d8c0(0000) GS:ffff888135d00000(0000) knlGS:00000000000000= 00 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f1d7ed03000 CR3: 000000001b28a000 CR4: 0000000000350ee0 > Call Trace: > arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 > stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 > kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 > kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348 > task_work_add+0x3a/0x190 kernel/task_work.c:38 > fput_many fs/file_table.c:341 [inline] > fput_many+0xeb/0x1a0 fs/file_table.c:334 > path_openat+0x1b9d/0x2710 fs/namei.c:3570 > do_filp_open+0x1c1/0x290 fs/namei.c:3588 > do_sys_openat2+0x61b/0x9a0 fs/open.c:1200 > do_sys_open+0xc3/0x140 fs/open.c:1216 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x7f1d80edd840 > Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 > 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d > 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 > RSP: 002b:00007ffea39c6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 > RAX: ffffffffffffffda RBX: 00007ffea39c70b0 RCX: 00007f1d80edd840 > RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005622bad902e0 > RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff > R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff > R13: 00005622bad8c040 R14: 00007ffea39c7070 R15: 00005622bad98470 > NMI backtrace for cpu 0 skipped: idling at native_safe_halt > arch/x86/include/asm/irqflags.h:51 [inline] > NMI backtrace for cpu 0 skipped: idling at arch_safe_halt > arch/x86/include/asm/irqflags.h:89 [inline] > NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 > arch/x86/kernel/process.c:716 > NMI backtrace for cpu 1 skipped: idling at native_safe_halt > arch/x86/include/asm/irqflags.h:51 [inline] > NMI backtrace for cpu 1 skipped: idling at arch_safe_halt > arch/x86/include/asm/irqflags.h:89 [inline] > NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 > arch/x86/kernel/process.c:716 > ---------------- > Code disassembly (best guess): > 0: 8e 98 03 00 00 41 mov 0x41000003(%rax),%ds > 6: 39 2e cmp %ebp,(%rsi) > 8: 0f 85 8f 00 00 00 jne 0x9d > e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax > 15: fc ff df > 18: 48 8b 14 24 mov (%rsp),%rdx > 1c: 48 c1 ea 03 shr $0x3,%rdx > 20: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) > 24: 0f 85 a6 03 00 00 jne 0x3d0 > * 2a: 49 8d 7e 08 lea 0x8(%r14),%rdi <-- trapping instruction > 2e: 49 8b 6e 38 mov 0x38(%r14),%rbp > 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax > 39: fc ff df > 3c: 48 89 fa mov %rdi,%rdx > 3f: 48 rex.W --=20 Filipe David Manana, =E2=80=9CWhether you think you can, or you think you can't =E2=80=94 you're= right.=E2=80=9D