INFO: task syz.0.130:7101 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.130       state:D stack:28680 pid:7101  tgid:7079  ppid:5854   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
 filename_create+0x1f8/0x3c0
 do_mknodat+0x184/0x4d0
 __x64_sys_mknod+0x8c/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff426b8ebe9
RSP: 002b:00007ff427919038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007ff426db6090 RCX: 00007ff426b8ebe9
RDX: 0000000000000701 RSI: 0000000000000004 RDI: 0000200000000000
RBP: 00007ff426c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff426db6128 R14: 00007ff426db6090 R15: 00007ffca0f5a1a8
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:0/12:
 #0: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff888136624008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u10:3/53:
 #0: ffff88810018e948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900007bfbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88812274a0e0 (&type->s_umount_key#83){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff888127003918 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
2 locks held by getty/5678:
 #0: ffff88810fae00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
4 locks held by syz.0.130/7080:
2 locks held by syz.0.130/7101:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
2 locks held by syz.0.130/7103:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: path_openat+0x8da/0x3830
2 locks held by syz.0.130/7104:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: path_openat+0x8da/0x3830
2 locks held by syz.0.130/7107:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
2 locks held by syz.0.130/7129:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
2 locks held by syz.0.130/7130:
 #0: ffff88812274a428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888127003cc8 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa80
2 locks held by syz.7.398/9664:
2 locks held by dhcpcd-run-hook/9666:

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9671 Comm: dhcpcd-run-hook 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:check_preemption_disabled+0x58/0x120
Code: 48 8b 0d 9b 8e 26 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 81 c9 02 00 cc 48 c7 04 24 00 00 00 00 <9c> 8f 04 24 f7 04 24 00 02 00 00 74 c8 65 4c 8b 3c 25 08 50 a0 92
RSP: 0018:ffffc900039af240 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffffffff8d9cb31c RDI: ffffffff8be33680
RBP: ffffffff8172c195 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900039af438 R11: ffffffff81ac3820 R12: 0000000000000002
R13: ffffffff8e139ee0 R14: 0000000000000000 R15: 0000000000000246
FS:  00007fcf84178380(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa5f77fe8 CR3: 000000010eeae000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0xe7/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 vm_area_dup+0x2b/0x680
 dup_mmap+0x90c/0x1ac0
 copy_mm+0x13c/0x4b0
 copy_process+0x1706/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf842b2a12
Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fffa5f77988 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fcf842b2a12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00005625ab960b70 R08: 0000000000000000 R09: 0000000000000200
R10: 00007fcf84178650 R11: 0000000000000246 R12: 0000000000000084
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000024
 </TASK>
