From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA1812F3B for ; Mon, 9 Dec 2024 02:08:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733710100; cv=none; b=RY5PARcjuxroyZrkM+lfDXAXyy8KfwffGcZiIONrKUmnO2B3Ld7NkkpaaLU5kfU/6FpMXsAikhuyU4xaxnbEOUg+1yB0Q+Ked2umNflaA1Jrnam2T1Dbxa4sxRMozth4rJY6lKyizasD+nFaGYL2iYtpXUUIskyBEWDT93B64Aw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733710100; c=relaxed/simple; bh=qWLXZEkPQF7gmXwMqALF2or+PUUskyVnccLb5FbIdnY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=lP/DQfy7tC20PAYR8btU8tcJYNV/kXSRcxvnZ0eFBY7hIazAFFvIq0V3t0+hHh/5NtQPgArE6u3RWb3Q9LIjyolxgMdm/ABwyYB4iQyNDBHe2eVp5QsgmlA+bHGGXpF+oTJ/uBZEL9rMnarcVghoMZVvLCb2n3Gyk6Dis9j0TB4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.205 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f205.google.com with SMTP id e9e14a558f8ab-3a7d85ab308so39480965ab.3 for ; Sun, 08 Dec 2024 18:08:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733710098; x=1734314898; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Xn2ZHNbRYeF2dv5QXiMG3lz/0jPo9gm24tCSwSfrP7Q=; b=Kw+PJ3lZ2/i+b7kj65t6swA+ID0O6kfUdHvn0COqwXKKfoHzr9A8nrmZybzz/Yyi/T B1aiekNNZpnjREz7cWi8Bn+MiRd81rU+6PSHtkTYGAb1ZTBMpr7TlnmSvGpU3ywqlMc1 2A152vPWGPG0OS+MyHS0LO/lG3QxAcy9XMngwN8fx8dSgF0+X21RnOtiSk1V3IL17R1Z 4/8uNiruDDvHXZp690H14hyuMiZI151i0IL7Kd5r3Qg147VV599FyVJU0+iINNjuDXkb RFt5jYN1LfUNd55jogRyFrhlrUwARPtGXVFs8fkpbjBiQXGTYU2iIlwBuJaE67yYkCGD YkKw== X-Forwarded-Encrypted: i=1; AJvYcCX+bpMN0m6lV7uKYEC1yf0acToXjwBX/EYzpOD7kChG24byfmV8qaHUOs5xRP8b94OyCmHBYKN+6GPCyzA=@vger.kernel.org X-Gm-Message-State: AOJu0YxVy0ZHBA4LQRhGaz+ACey8JPU0FtAuxVD/NQiT0MYdZX+IpQg0 wSq98kX9FR5iS/BEtUe50EvIgfzRJ6Ju1x/o3++QNs5Oqhr1j2MPDOcAekEHDLDg8E7RHSVyc85 v8TG32rS8JR0BdniLSZ2ibo4dH7BfjSdS7xw4okYWnXqW+nfcGAwqGi0= X-Google-Smtp-Source: AGHT+IEq2VPVi18isp/4kwL0GOkvqM6KnU9OhT/izEIHSQpp0QDXLR4BlOlfj1N8I5JAaInTGs+3BdpN62NMMDJIXYSFtcP9u9I6 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:19c8:b0:3a7:e592:55cd with SMTP id e9e14a558f8ab-3a811dcca00mr114712505ab.14.1733710098047; Sun, 08 Dec 2024 18:08:18 -0800 (PST) Date: Sun, 08 Dec 2024 18:08:18 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67565112.050a0220.2477f.0034.GAE@google.com> Subject: [syzbot] [ocfs2?] possible deadlock in ocfs2_start_trans From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: feffde684ac2 Merge tag 'for-6.13-rc1-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b428df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ad7dafcfaa48849c dashboard link: https://syzkaller.appspot.com/bug?extid=f1635714e1cb9816b1ac compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c51d22ca6229/disk-feffde68.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/282335ac1978/vmlinux-feffde68.xz kernel image: https://storage.googleapis.com/syzbot-assets/d341f69bc687/bzImage-feffde68.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f1635714e1cb9816b1ac@syzkaller.appspotmail.com ocfs2: Mounting device (7,8) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc1-syzkaller-00025-gfeffde684ac2 #0 Not tainted ------------------------------------------------------ syz.8.6075/25085 is trying to acquire lock: ffff888021f6e0e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 but task is already holding lock: ffff888029b76610 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_local_alloc_slide_window+0x454/0x18e0 fs/ocfs2/localalloc.c:1271 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1725 [inline] sb_start_intwrite include/linux/fs.h:1908 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:348 ocfs2_update_inode_atime+0xee/0x5e0 fs/ocfs2/file.c:261 ocfs2_inode_lock_atime+0x39a/0x3c0 fs/ocfs2/dlmglue.c:2608 ocfs2_mmap+0xd1/0x280 fs/ocfs2/mmap.c:166 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2291 [inline] __mmap_new_vma mm/vma.c:2355 [inline] __mmap_region+0x1789/0x2670 mm/vma.c:2456 mmap_region+0x270/0x320 mm/mmap.c:1347 do_mmap+0xc00/0xfc0 mm/mmap.c:496 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:580 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:542 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #7 (&mm->mmap_lock){++++}-{4:4}: __might_fault mm/memory.c:6751 [inline] __might_fault+0x11b/0x190 mm/memory.c:6744 _inline_copy_from_user include/linux/uaccess.h:162 [inline] _copy_from_user+0x29/0xd0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] __blk_trace_setup+0xa8/0x180 kernel/trace/blktrace.c:626 blk_trace_ioctl+0x163/0x290 kernel/trace/blktrace.c:740 blkdev_ioctl+0x109/0x6d0 block/ioctl.c:682 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #6 (&q->debugfs_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 blk_mq_init_sched+0x42b/0x640 block/blk-mq-sched.c:473 elevator_init_mq+0x2cd/0x420 block/elevator.c:610 add_disk_fwnode+0x113/0x1300 block/genhd.c:413 sd_probe+0xa86/0x1000 drivers/scsi/sd.c:4024 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x15a/0x1e0 drivers/base/bus.c:459 __device_attach_async_helper+0x1d3/0x290 drivers/base/dd.c:987 async_run_entry_fn+0x9f/0x530 kernel/async.c:129 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #5 (&q->q_usage_counter(queue)#50){++++}-{0:0}: blk_queue_enter+0x50f/0x640 block/blk-core.c:328 blk_mq_alloc_request+0x59b/0x950 block/blk-mq.c:651 scsi_alloc_request drivers/scsi/scsi_lib.c:1222 [inline] scsi_execute_cmd+0x1eb/0xf40 drivers/scsi/scsi_lib.c:304 read_capacity_16+0x213/0xe10 drivers/scsi/sd.c:2655 sd_read_capacity drivers/scsi/sd.c:2824 [inline] sd_revalidate_disk.isra.0+0x1a06/0xa8d0 drivers/scsi/sd.c:3734 sd_probe+0x904/0x1000 drivers/scsi/sd.c:4010 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x15a/0x1e0 drivers/base/bus.c:459 __device_attach_async_helper+0x1d3/0x290 drivers/base/dd.c:987 async_run_entry_fn+0x9f/0x530 kernel/async.c:129 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #4 (&q->limits_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 queue_limits_start_update include/linux/blkdev.h:949 [inline] loop_reconfigure_limits+0x407/0x8c0 drivers/block/loop.c:998 loop_set_block_size drivers/block/loop.c:1473 [inline] lo_simple_ioctl drivers/block/loop.c:1496 [inline] lo_ioctl+0x901/0x18b0 drivers/block/loop.c:1559 blkdev_ioctl+0x279/0x6d0 block/ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&q->q_usage_counter(io)#23){++++}-{0:0}: bio_queue_enter block/blk.h:75 [inline] blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3091 __submit_bio+0x384/0x540 block/blk-core.c:629 __submit_bio_noacct_mq block/blk-core.c:710 [inline] submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739 submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868 ext4_commit_super+0x222/0x4c0 fs/ext4/super.c:6236 ext4_handle_error+0x611/0x730 fs/ext4/super.c:727 __ext4_error_inode+0x34d/0x650 fs/ext4/super.c:869 ext4_free_branches+0x58d/0x680 fs/ext4/indirect.c:1020 ext4_ind_truncate+0x760/0x980 fs/ext4/indirect.c:1164 ext4_truncate+0xeaa/0x1270 fs/ext4/inode.c:4219 ext4_process_orphan+0x154/0x410 fs/ext4/orphan.c:339 ext4_orphan_cleanup+0x742/0x1210 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5610 [inline] ext4_fill_super+0x9631/0xaab0 fs/ext4/super.c:5733 get_tree_bdev_flags+0x38e/0x620 fs/super.c:1636 vfs_get_tree+0x92/0x380 fs/super.c:1814 do_new_mount fs/namespace.c:3507 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount fs/namespace.c:4034 [inline] __x64_sys_mount+0x294/0x320 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ei->i_data_sem){++++}-{4:4}: down_write+0x93/0x200 kernel/locking/rwsem.c:1577 ext4_truncate+0xdd5/0x1270 fs/ext4/inode.c:4212 ext4_setattr+0x1c64/0x2a70 fs/ext4/inode.c:5541 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15c/0x220 fs/open.c:65 do_ftruncate+0x5d9/0x720 fs/open.c:181 do_sys_ftruncate+0x61/0xb0 fs/open.c:196 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (jbd2_handle){++++}-{0:0}: start_this_handle+0xf92/0x1430 fs/jbd2/transaction.c:448 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:505 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:544 ocfs2_start_trans+0x3b9/0x970 fs/ocfs2/journal.c:352 ocfs2_modify_bh+0xbe/0x490 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0xd68/0x1610 fs/ocfs2/quota_local.c:771 dquot_load_quota_sb+0x83d/0x1050 fs/quota/dquot.c:2459 dquot_load_quota_inode fs/quota/dquot.c:2496 [inline] dquot_load_quota_inode+0x2a3/0x470 fs/quota/dquot.c:2488 ocfs2_enable_quotas+0x28b/0x5a0 fs/ocfs2/super.c:926 ocfs2_fill_super+0x2299/0x41d0 fs/ocfs2/super.c:1141 mount_bdev+0x1e6/0x2d0 fs/super.c:1693 legacy_get_tree+0x10c/0x220 fs/fs_context.c:662 vfs_get_tree+0x92/0x380 fs/super.c:1814 do_new_mount fs/namespace.c:3507 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount fs/namespace.c:4034 [inline] __x64_sys_mount+0x294/0x320 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&journal->j_trans_barrier){.+.+}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 ocfs2_local_alloc_slide_window+0x454/0x18e0 fs/ocfs2/localalloc.c:1271 ocfs2_reserve_local_alloc_bits+0x4f0/0xc50 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x697/0xe80 fs/ocfs2/suballoc.c:1166 ocfs2_expand_inline_dir.constprop.0+0x491/0x41a0 fs/ocfs2/dir.c:2837 ocfs2_extend_dir+0x1e0/0x1c90 fs/ocfs2/dir.c:3182 ocfs2_prepare_dir_for_insert+0x12a7/0x1700 fs/ocfs2/dir.c:4287 ocfs2_mknod+0x8f1/0x2440 fs/ocfs2/namei.c:292 ocfs2_create+0x185/0x450 fs/ocfs2/namei.c:672 lookup_open.isra.0+0x1177/0x14c0 fs/namei.c:3649 open_last_lookups fs/namei.c:3748 [inline] path_openat+0x904/0x2d60 fs/namei.c:3984 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_creat fs/open.c:1495 [inline] __se_sys_creat fs/open.c:1489 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1489 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &journal->j_trans_barrier --> &mm->mmap_lock --> sb_internal#5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_internal#5); lock(&mm->mmap_lock); lock(sb_internal#5); rlock(&journal->j_trans_barrier); *** DEADLOCK *** 6 locks held by syz.8.6075/25085: #0: ffff888029b76420 (sb_writers#33){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3737 [inline] #0: ffff888029b76420 (sb_writers#33){.+.+}-{0:0}, at: path_openat+0x1f8d/0x2d60 fs/namei.c:3984 #1: ffff888055791800 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #1: ffff888055791800 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: open_last_lookups fs/namei.c:3745 [inline] #1: ffff888055791800 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: path_openat+0x153e/0x2d60 fs/namei.c:3984 #2: ffff8880557914a0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_expand_inline_dir.constprop.0+0x3e7/0x41a0 fs/ocfs2/dir.c:2801 #3: ffff888052c342c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #3: ffff888052c342c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xf1/0xc50 fs/ocfs2/localalloc.c:636 #4: ffff888057831800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #4: ffff888057831800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11d/0x48e0 fs/ocfs2/suballoc.c:786 #5: ffff888029b76610 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_local_alloc_slide_window+0x454/0x18e0 fs/ocfs2/localalloc.c:1271 stack backtrace: CPU: 1 UID: 0 PID: 25085 Comm: syz.8.6075 Not tainted 6.13.0-rc1-syzkaller-00025-gfeffde684ac2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 ocfs2_local_alloc_slide_window+0x454/0x18e0 fs/ocfs2/localalloc.c:1271 ocfs2_reserve_local_alloc_bits+0x4f0/0xc50 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x697/0xe80 fs/ocfs2/suballoc.c:1166 ocfs2_expand_inline_dir.constprop.0+0x491/0x41a0 fs/ocfs2/dir.c:2837 ocfs2_extend_dir+0x1e0/0x1c90 fs/ocfs2/dir.c:3182 ocfs2_prepare_dir_for_insert+0x12a7/0x1700 fs/ocfs2/dir.c:4287 ocfs2_mknod+0x8f1/0x2440 fs/ocfs2/namei.c:292 ocfs2_create+0x185/0x450 fs/ocfs2/namei.c:672 lookup_open.isra.0+0x1177/0x14c0 fs/namei.c:3649 open_last_lookups fs/namei.c:3748 [inline] path_openat+0x904/0x2d60 fs/namei.c:3984 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_creat fs/open.c:1495 [inline] __se_sys_creat fs/open.c:1489 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1489 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faff157ff19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faff23c8058 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007faff1745fa0 RCX: 00007faff157ff19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000e00 RBP: 00007faff15f3986 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007faff1745fa0 R15: 00007ffe8fb9c9f8 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup