team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
INFO: task syz-executor0:8059 blocked for more than 140 seconds.
      Not tainted 4.20.0-rc1+ #109
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D18616  8059      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x9b/0x120 kernel/locking/rwsem.c:26
 inode_lock_shared include/linux/fs.h:767 [inline]
 lookup_slow+0x49/0x80 fs/namei.c:1687
 walk_component+0x92b/0x2590 fs/namei.c:1810
 link_path_walk.part.40+0xa61/0x1530 fs/namei.c:2141
 link_path_walk fs/namei.c:2072 [inline]
 path_openat+0x270/0x5150 fs/namei.c:3533
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455570
Code: 31 c0 e9 45 ff ff ff 0f 1f 00 80 3f 00 0f 84 f7 00 00 00 55 53 b9 02 00 00 00 be 00 08 09 00 89 c8 48 81 ec 98 00 00 00 0f 05 <48> 3d 00 f0 ff ff 48 89 c3 0f 87 e9 00 00 00 85 db 0f 88 2f 01 00
RSP: 002b:00007ffd11926c60 EFLAGS: 00000206 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455570
RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004bc2ae
RBP: 00000000000001af R08: 0000000000000001 R09: 0000000001318940
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002
R13: 000000000011d21c R14: 0000000000000040 R15: 0000000000000000
INFO: task syz-executor0:9864 blocked for more than 140 seconds.
      Not tainted 4.20.0-rc1+ #109
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D24632  9864   8059 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:757 [inline]
 do_last fs/namei.c:3321 [inline]
 path_openat+0x15c4/0x5150 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: 83 c4 18 c3 e8 d8 64 00 00 48 8b 04 24 48 8b 4c 24 08 48 89 01 e8 d7 2d fc ff e8 22 7a fc ff b8 02 00 00 00 48 8d 0d aa 54 0b <01> 87 01 8b 05 a2 54 0b 01 83 f8 01 0f 85 8a 00 00 00 b8 01 00 00
RSP: 002b:00007f74139a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569
RDX: 0000000000002761 RSI: 0000000020000040 RDI: ffffffffffffffff
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f74139a36d4
R13: 00000000004c2d83 R14: 00000000004d4728 R15: 00000000ffffffff

Showing all locks held in the system:
3 locks held by kworker/u4:4/314:
1 lock held by khungtaskd/1008:
 #0: 00000000045686d6 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
1 lock held by rsyslogd/6024:
 #0: 000000007b0115b5 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
2 locks held by getty/6146:
 #0: 00000000c6ca1c87 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000037f3a208 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6147:
 #0: 00000000da6b6385 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000e53fee77 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6148:
 #0: 00000000aadba844 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000005d23016c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6149:
 #0: 0000000064b7bdf5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000783ad458 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6150:
 #0: 0000000084cacd8f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000005593dc89 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6151:
 #0: 0000000031bfcaee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000f6d529cc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6152:
 #0: 0000000084777f39 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000ee45ceb6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
1 lock held by syz-executor0/8059:
 #0: 0000000035288956 (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
 #0: 0000000035288956 (&sb->s_type->i_mutex_key#27){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687
4 locks held by syz-executor0/9853:
2 locks held by syz-executor0/9864:
 #0: 00000000dcaccff6 (sb_writers#22){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline]
 #0: 00000000dcaccff6 (sb_writers#22){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 0000000035288956 (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock include/linux/fs.h:757 [inline]
 #1: 0000000035288956 (&sb->s_type->i_mutex_key#27){++++}, at: do_last fs/namei.c:3321 [inline]
 #1: 0000000035288956 (&sb->s_type->i_mutex_key#27){++++}, at: path_openat+0x15c4/0x5150 fs/namei.c:3534

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1008 Comm: khungtaskd Not tainted 4.20.0-rc1+ #109
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xb51/0x1060 kernel/hung_task.c:289
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.807 msecs
CPU: 0 PID: 314 Comm: kworker/u4:4 Not tainted 4.20.0-rc1+ #109
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:match_held_lock+0x12/0x8d0 kernel/locking/lockdep.c:3401
Code: 45 d8 e9 fd fc ff ff 4c 89 e7 e8 d9 18 62 00 4c 8d 45 d8 e9 c9 fc ff ff 48 ba 00 00 00 00 00 fc ff df 55 48 89 e5 41 57 41 56 <4c> 8d 75 d8 41 55 49 89 fd 48 83 c7 10 41 54 53 48 8d 9d 38 ff ff
RSP: 0018:ffff8801d9395c10 EFLAGS: 00000006
RAX: 0000000000000005 RBX: ffff8801d92c2f28 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8959b940 RDI: ffff8801d92c2f28
RBP: ffff8801d9395c20 R08: ffff8801d92c2680 R09: ffffed003b5c5b67
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801d92c2680
R13: ffffed003b2585df R14: ffff8801d92c2f00 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38e1866000 CR3: 00000001ce76a000 CR4: 00000000001426f0
Call Trace:
 __lock_is_held+0xb5/0x140 kernel/locking/lockdep.c:3664
 lock_is_held_type+0x118/0x210 kernel/locking/lockdep.c:3882
 lock_is_held include/linux/lockdep.h:339 [inline]
 rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281
 xa_entry include/linux/xarray.h:709 [inline]
 xas_reload include/linux/xarray.h:1057 [inline]
 find_get_entry+0xc9d/0x1120 mm/filemap.c:1440
 pagecache_get_page+0x12f/0xf00 mm/filemap.c:1518
 find_or_create_page include/linux/pagemap.h:322 [inline]
 grow_dev_page fs/buffer.c:947 [inline]
 grow_buffers fs/buffer.c:1016 [inline]
 __getblk_slow fs/buffer.c:1043 [inline]
 __getblk_gfp+0x3aa/0xd50 fs/buffer.c:1320
 __bread_gfp+0x2d/0x310 fs/buffer.c:1354
 sb_bread include/linux/buffer_head.h:307 [inline]
 __fat_write_inode+0x347/0xb60 fs/fat/inode.c:859
 fat_write_inode+0x97/0x180 fs/fat/inode.c:908
 write_inode fs/fs-writeback.c:1176 [inline]
 __writeback_single_inode+0xf56/0x1660 fs/fs-writeback.c:1375
 writeback_sb_inodes+0x71f/0x1210 fs/fs-writeback.c:1580
 __writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1649
 wb_writeback+0xa73/0xfc0 fs/fs-writeback.c:1758
 wb_check_start_all fs/fs-writeback.c:1882 [inline]
 wb_do_writeback fs/fs-writeback.c:1908 [inline]
 wb_workfn+0xee9/0x1790 fs/fs-writeback.c:1942
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352