INFO: task syz.0.289:7377 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.289       state:D stack:28936 pid:7377  tgid:7369  ppid:5850   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 do_renameat2+0x3b9/0xa80
 __x64_sys_rename+0x82/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa40338ebe9
RSP: 002b:00007fa4042ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fa4035c6090 RCX: 00007fa40338ebe9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000200000000580
RBP: 00007fa403411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4035c6128 R14: 00007fa4035c6090 R15: 00007ffcca3818d8
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u10:0/27:
 #0: ffff88810169e948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000060fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88811ff000e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff888122a4b918 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/1:1/47:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000075fbc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88811b762240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
2 locks held by getty/5675:
 #0: ffff88802760f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by kworker/0:3/5875:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900043ffbc0 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
4 locks held by syz.0.289/7370:
2 locks held by syz.0.289/7377:
 #0: ffff88811ff00428 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888122a4bcc8 (&type->i_mutex_dir_key#15/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa80
2 locks held by syz.4.427/8094:
 #0: ffff88811ff000e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
 #1: ffff88810802a7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x19f/0xa10

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9864 Comm: syz.7.810 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:lock_release+0xd8/0x3e0
Code: 20 fa 48 c7 c7 18 be 9c 8d e8 a4 73 dc 09 65 ff 05 4d 51 03 11 c7 44 24 20 01 00 00 00 83 3d 6e 52 06 0e 00 0f 84 96 01 00 00 <41> 8b 87 e8 0a 00 00 85 c0 0f 84 1d 01 00 00 4c 89 6c 24 18 48 89
RSP: 0018:ffffc900031cf4d0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000202 RCX: 1825a9534f0a4300
RDX: ffffc900031cf601 RSI: ffffffff8d9cbe18 RDI: ffffffff8be33900
RBP: dffffc0000000000 R08: ffffc900031cfec0 R09: 0000000000000000
R10: ffffc900031cf658 R11: fffff52000639ecd R12: ffffc900031cfed0
R13: ffffffff8172c195 R14: ffffffff8e139f20 R15: ffff888106b4b980
FS:  00007fd41c3726c0(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c462ad0 CR3: 000000011adf4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 vfree+0x25a/0x400
 kcov_close+0x28/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd41b58ebe9
Code: Unable to access opcode bytes at 0x7fd41b58ebbf.
RSP: 002b:00007fd41c3720e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd41b7c5fa8 RCX: 00007fd41b58ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd41b7c5fa8
RBP: 00007fd41b7c5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd41b7c6038 R14: 00007ffc11d07b70 R15: 00007ffc11d07c58
 </TASK>
