device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
INFO: task syz-executor5:12563 blocked for more than 140 seconds.
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
      Not tainted 4.20.0-rc5+ #369
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D19736 12563  29695 0x80000006
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=8
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
bond1 (unregistering): Released all slaves
 schedule+0xfe/0x460 kernel/sched/core.c:3516
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 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
device loop5 blocksize: 4096
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 deactivate_super+0x2b3/0x320 fs/super.c:359
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 cleanup_mnt+0xbf/0x160 fs/namespace.c:1098
b_state=0x00000029, b_size=512
 __cleanup_mnt+0x16/0x20 fs/namespace.c:1105
device loop5 blocksize: 4096
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1ad6/0x26d0 kernel/exit.c:867
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 do_group_exit+0x177/0x440 kernel/exit.c:970
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 get_signal+0x8b0/0x1980 kernel/signal.c:2517
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
RIP: 0033:0x457659
__find_get_block_slow() failed. block=1, b_blocknr=8
Code: Bad RIP value.
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
RSP: 002b:00007facb2d51cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
b_state=0x00000029, b_size=512
RAX: fffffffffffffe00 RBX: 000000000072bfa8 RCX: 0000000000457659
device loop5 blocksize: 4096
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072bfa8
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bfac
b_state=0x00000029, b_size=512
R13: 00007ffc485d480f R14: 00007facb2d529c0 R15: 000000000072bfac

Showing all locks held in the system:
device loop5 blocksize: 4096
1 lock held by khungtaskd/953:
team0 (unregistering): Port device team_slave_1 removed
 #0: 00000000c33398de (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
1 lock held by rsyslogd/5797:
2 locks held by getty/5888:
 #0: 000000009bf5fdf6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000d6fd84ee (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
2 locks held by getty/5889:
 #0: 000000003a61cdab (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 #1: 000000008e54765b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5890:
 #0: 00000000eb750b54 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000ad154a0a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/5891:
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 #0: 00000000197bc858 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 #1: 0000000080d58a3c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop5 blocksize: 4096
2 locks held by getty/5892:
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 #0: 00000000b49308ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 000000008680b487 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
2 locks held by getty/5893:
device loop5 blocksize: 4096
 #0: 000000005d0a4af4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000363f1883 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5894:
 #0: 000000006c5c4326 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 000000008eca9b12 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
3 locks held by kworker/1:4/11323:
device loop5 blocksize: 4096
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 00000000623ac653 ((wq_completion)"events"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124
 #1: 00000000cb60db06 ((linkwatch_work).work){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
 #2: 00000000fc0bec65 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
3 locks held by kworker/u4:7/24142:
7 locks held by kworker/u4:3/8069:
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
1 lock held by syz-executor5/12563:
__find_get_block_slow() failed. block=1, b_blocknr=8
 #0: 00000000e75b8ab3 (&type->s_umount_key#59){++++}, at: deactivate_super+0x2b3/0x320 fs/super.c:359
b_state=0x00000029, b_size=512
1 lock held by ip/15443:
device loop5 blocksize: 4096
 #0: 00000000fc0bec65 (rtnl_mutex){+.+.}, at: __netlink_dump_start+0x107/0x7c0 net/netlink/af_netlink.c:2316
1 lock held by ip/15446:
 #0: 00000000fc0bec65 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000fc0bec65 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40e/0xc20 net/core/rtnetlink.c:4944
kobject: 'tx-0': free name

kobject: 'queues' (000000009f33f242): kobject_cleanup, parent           (null)
=============================================

kobject: 'queues' (000000009f33f242): calling ktype release
NMI backtrace for cpu 1
__find_get_block_slow() failed. block=1, b_blocknr=8
CPU: 1 PID: 953 Comm: khungtaskd Not tainted 4.20.0-rc5+ #369
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
b_state=0x00000029, b_size=512
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
device loop5 blocksize: 4096
 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
kobject: 'queues' (000000009f33f242): kset_release
 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62
__find_get_block_slow() failed. block=1, b_blocknr=8
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xb51/0x1060 kernel/hung_task.c:289
b_state=0x00000029, b_size=512
device loop5 blocksize: 4096
kobject: 'queues': free name
kobject: 'veth1_to_team' (000000002f910c73): kobject_uevent_env
kobject: 'veth1_to_team' (000000002f910c73): kobject_uevent_env: uevent_suppress caused the event to drop!
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
__find_get_block_slow() failed. block=1, b_blocknr=8
Sending NMI from CPU 1 to CPUs 0:
b_state=0x00000029, b_size=512
NMI backtrace for cpu 0
CPU: 0 PID: 24142 Comm: kworker/u4:7 Not tainted 4.20.0-rc5+ #369
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-7:5)
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94
Code: dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 55 <48> 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 48 69 82
RSP: 0018:ffff88819c205ba0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 000000000000000f RCX: ffffffff87d6bafc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88819c205c80 R08: ffff8881d2d721c0 R09: ffffed1033840bab
R10: ffffed1033840bab R11: 0000000000000003 R12: ffffffff882bf46e
R13: 0000000000000000 R14: ffffffff882bf46e R15: ffff88819c205c58
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045762f CR3: 00000001ba379000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 snprintf+0xae/0xe0 lib/vsprintf.c:2429
 print_time kernel/printk/printk.c:1226 [inline]
 print_prefix+0x38e/0x3f0 kernel/printk/printk.c:1251
 msg_print_text+0x83/0x1d0 kernel/printk/printk.c:1274
 console_unlock+0x4e6/0x1190 kernel/printk/printk.c:2388
 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964
 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
 printk+0xa7/0xcf kernel/printk/printk.c:1997
 __find_get_block_slow fs/buffer.c:235 [inline]
 __find_get_block.cold.57+0x85/0xff fs/buffer.c:1294
 __getblk_slow fs/buffer.c:1039 [inline]
 __getblk_gfp+0x2b3/0xd50 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_old_data_flush fs/fs-writeback.c:1860 [inline]
 wb_do_writeback fs/fs-writeback.c:1913 [inline]
 wb_workfn+0x1008/0x1790 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
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.758 msecs