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[23.128.96.18]) by mx.google.com with ESMTP id i15si148430pjd.96.2021.10.27.07.51.16; Wed, 27 Oct 2021 07:51:53 -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=D4rlDYy0; 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 S236995AbhJ0BP7 (ORCPT + 99 others); Tue, 26 Oct 2021 21:15:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234339AbhJ0BP6 (ORCPT ); Tue, 26 Oct 2021 21:15:58 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10F14C061570; Tue, 26 Oct 2021 18:13:34 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id oa4so806791pjb.2; Tue, 26 Oct 2021 18:13:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to:cc; bh=cpbXfaujGQZZrMSjY13IovM15SN+jLVHfNh23KEBjCY=; b=D4rlDYy0U1uqRpnnrortPCA46izWpvMwXgkXWlbSRcDpc5tbaQ2vLBdJNROyZvKP+T +Cb152rw9t/NbGVptM98zTgbO2jzaQGF+KOXS7srePTVBt8X+w+J/h0KeFq4jbVpCuXz vNUqccHuu7rYsSIoYy04QK61z1qUqfT2f+sJRUPNWIVtqoQ5+KnifhVQJ5QRxYkBSENb yX0HH6+o4JecY7zZbn/ahtwz8irvOhVoJ1ElRkRDEqtG19tw5h4ftaJYhAaFSToRPZh3 abDLq8pmd76rRyLS8brFSaTHZRhQM4Bw3WcDhKTLezS+8GaotLDf1ZEugY6O42AjT4RL pJug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=cpbXfaujGQZZrMSjY13IovM15SN+jLVHfNh23KEBjCY=; b=fZPmTu9Ka9Wd3PBVIYpCsDpMDtBZtyigV7fb5vpLRCATaelGVRIn3xyuSJ+1qCAl+0 FHNKqOmvPOCiPIafcng3a2hks8x4OfB6VJdRuqJRZehRwxcj1Sls0/kEAQ+Uo/ZdNhQQ 6G8y1PBteAmdLvUhhDUXKKqj3uVWRI9QJYSfT+/6Sv+c8eaP5wUgcevpur0Utk6Sbq4H OIVgt5hdbyJs0DBu1aiTz18uXvtRPaFwKOPHEVIccEVJOpAImy3ayNrvQU5dBdZ+FTgU ByN0t2+GOk8ekKoKb45jOS75aWqaOViGYJa0tQ2FlXrQ1D+uEmry7sPmw0XqN+xbMd+3 jhjQ== X-Gm-Message-State: AOAM530MmemsRdishsJ0kjOM4YRXnNdwz1rjsIOvnPhYReZMUUHl+Dry egPy6vipq8lfkfyeZeoYEgKI4ugbnusJ4PW8CA== X-Received: by 2002:a17:90a:6b0b:: with SMTP id v11mr2499042pjj.178.1635297213442; Tue, 26 Oct 2021 18:13:33 -0700 (PDT) MIME-Version: 1.0 From: Hao Sun Date: Wed, 27 Oct 2021 09:13:20 +0800 Message-ID: Subject: INFO: task hung in btrfs_search_slot To: clm@fb.com, dsterba@suse.com, Josef Bacik , linux-btrfs@vger.kernel.org, Qu Wenruo Cc: Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, When using Healer to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: 519d81956ee2 Linux 5.15-rc6 git tree: upstream console output: https://drive.google.com/file/d/1SFUNYlZ6tpKe9gvGXKAezMNUFOOjFFiA/view?usp=sharing kernel config: https://drive.google.com/file/d/12PUnxIM1EPBgW4ZJmI7WJBRaY1lA83an/view?usp=sharing 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:0x00004004 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:0x00004004 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:0x00004004 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:604 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:0000000000000000 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