INFO: task syz-executor.1:30627 blocked for more than 143 seconds.
      Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D
 stack:28256 pid:30627 ppid:29692  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f2a320276c6
RSP: 002b:00007fff15708d68 EFLAGS: 00010287

RAX: 0000001b33322000 RBX: 00007f2a321ac018 RCX: 0000001b33320000
RDX: 0000001b33322004 RSI: 0000001b33321d98 RDI: 00000000f3a4e694
RBP: 00000000f3a4e694 R08: 0000001b33720000 R09: 00000000f3a4e698
R10: 00007fff15773090 R11: 0000000000046f46 R12: 00007f2a321a0000
R13: 0000000000000001 R14: 0000000000002335 R15: ffffffff89b96b6e
 </TASK>

Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I
 stack:29056 pid:12    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
 rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c7929f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:rcu_tasks_trace state:I stack:29224 pid:13    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
 rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c7926f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:getty           state:S stack:23336 pid:4755  ppid:1      flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
 wait_woken+0x197/0x200 kernel/sched/wait.c:463
 n_tty_read+0x1055/0x13e0 drivers/tty/n_tty.c:2243
 iterate_tty_read drivers/tty/tty_io.c:852 [inline]
 tty_read+0x30e/0x5a0 drivers/tty/tty_io.c:927
 call_read_iter include/linux/fs.h:2185 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x681/0x930 fs/read_write.c:470
 ksys_read+0x12b/0x250 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7faecf74a8fe
RSP: 002b:00007ffc7ff8b0b8 EFLAGS: 00000246
 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000556314e37910 RCX: 00007faecf74a8fe
RDX: 0000000000000001 RSI: 00007ffc7ff8b0d0 RDI: 0000000000000000
RBP: 0000556314e37970 R08: 0000000000000007 R09: 0000556314e38cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000556314e379ac
R13: 00007ffc7ff8b0d0 R14: 0000000000000000 R15: 0000556314e379ac
 </TASK>
2 locks held by getty/4755:
 #0: 
ffff888027114098
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor.1  state:D
 stack:28256 pid:30627 ppid:29692  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f2a320276c6
RSP: 002b:00007fff15708d68 EFLAGS: 00010287
RAX: 0000001b33322000 RBX: 00007f2a321ac018 RCX: 0000001b33320000
RDX: 0000001b33322004 RSI: 0000001b33321d98 RDI: 00000000f3a4e694
RBP: 00000000f3a4e694 R08: 0000001b33720000 R09: 00000000f3a4e698
R10: 00007fff15773090 R11: 0000000000046f46 R12: 00007f2a321a0000
R13: 0000000000000001 R14: 0000000000002335 R15: ffffffff89b96b6e
 </TASK>
1 lock held by syz-executor.1/30627:
 #0: ffff888020c46498 (&mm->mmap_lock
){++++}-{3:3}
, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.1  state:R  running task     stack:26928 pid:30632 ppid:29692  flags:0x0000400e
Call Trace:
 <TASK>
 </TASK>
1 lock held by syz-executor.1/30632:
task:syz-executor.1  state:D stack:28256 pid:30700 ppid:30686  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fa19bc276c6
RSP: 002b:00007ffd55aa03a8 EFLAGS: 00010287

RAX: 0000001b31924000 RBX: 00007fa19bdac018 RCX: 0000001b31920000
RDX: 0000001b31924004 RSI: 0000001b31923880 RDI: 00000000e9420ad4
RBP: 00000000e9420ad4 R08: 0000001b31f20000 R09: 00000000e9420ad8
R10: 00007ffd55bad090 R11: 000000000004963a R12: 00007fa19bda0000
R13: 0000000000000001 R14: 0000000000021db2 R15: ffffffff89b8d6fd
 </TASK>
1 lock held by syz-executor.1/30700:
 #0: ffff88808d6c9c98 (&mm->mmap_lock){++++}-{3:3}
, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.1  state:R  running task     stack:26928 pid:30701 ppid:30686  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6739
 preempt_schedule_thunk+0x1a/0x20 arch/x86/entry/thunk_64.S:34
 </TASK>
5 locks held by syz-executor.1/30701:
task:syz-executor.1  state:D
 stack:28256 pid:30740 ppid:30727  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f86a1c276c6
RSP: 002b:00007ffd29838848 EFLAGS: 00010287
RAX: 0000001b2c224000 RBX: 00007f86a1dac018 RCX: 0000001b2c220000
RDX: 0000001b2c224004 RSI: 0000001b2c22390c RDI: 00000000cf5d895a
RBP: 00000000cf5d895a R08: 0000001b2c820000 R09: 00000000cf5d895e
R10: 00007ffd299e7090 R11: 000000000004c040 R12: 00007f86a1da0000
R13: 0000000000000001 R14: 0000000000024613 R15: ffffffff89b85ae9
 </TASK>
1 lock held by syz-executor.1/30740:
 #0: 
ffff88807a099c98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
ffff88807a099c98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.1  state:R  running task     stack:26928 pid:30741 ppid:30727  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 preempt_schedule_thunk+0x1a/0x20 arch/x86/entry/thunk_64.S:34
 </TASK>
5 locks held by syz-executor.1/30741:
task:dhcpcd          state:D
 stack:28776 pid:30744 ppid:4651   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 synchronize_rcu_expedited+0x5e2/0x770 kernel/rcu/tree_exp.h:1005
 synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3481
 synchronize_net+0x4e/0x60 net/core/dev.c:10749
 __unregister_prot_hook+0x4c5/0x5e0 net/packet/af_packet.c:382
 packet_do_bind+0x8f8/0xe30 net/packet/af_packet.c:3227
 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311
 __sys_bind+0x1ed/0x260 net/socket.c:1776
 __do_sys_bind net/socket.c:1787 [inline]
 __se_sys_bind net/socket.c:1785 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82fc264ce7
RSP: 002b:00007fffa501eab8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000559c76493b60 RCX: 00007f82fc264ce7
RDX: 0000000000000014 RSI: 00007fffa501eac8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000559c77d64ec0 R09: 00007f82fc325a60
R10: 0000000000200000 R11: 0000000000000217 R12: 0000559c77d62740
R13: 0000559c77d64c58 R14: 00007fffa503f39c R15: 00007fffa503f3c4
 </TASK>
2 locks held by dhcpcd/30744:
 #0: ffff888020016130
 (
sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline]
sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3194
 #1: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #1: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x658/0x770 kernel/rcu/tree_exp.h:990
task:dhcpcd          state:D stack:29096 pid:30745 ppid:4651   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6705
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 synchronize_rcu_expedited+0x400/0x770 kernel/rcu/tree_exp.h:990
 synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3481
 synchronize_net+0x4e/0x60 net/core/dev.c:10749
 __unregister_prot_hook+0x4c5/0x5e0 net/packet/af_packet.c:382
 packet_do_bind+0x8f8/0xe30 net/packet/af_packet.c:3227
 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311
 __sys_bind+0x1ed/0x260 net/socket.c:1776
 __do_sys_bind net/socket.c:1787 [inline]
 __se_sys_bind net/socket.c:1785 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82fc264ce7
RSP: 002b:00007fffa501eab8 EFLAGS: 00000217
 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000559c76493b60 RCX: 00007f82fc264ce7
RDX: 0000000000000014 RSI: 00007fffa501eac8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000559c77d65040 R09: 00007f82fc325a60
R10: 0000000000200000 R11: 0000000000000217 R12: 0000559c77d62740
R13: 0000559c77d64f28 R14: 00007fffa503f39c R15: 00007fffa503f3c4
 </TASK>
2 locks held by dhcpcd/30745:
 #0: 
ffff88801d9ac130
 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline]
 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3194
 #1: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #1: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x400/0x770 kernel/rcu/tree_exp.h:990
task:dhcpcd          state:D
 stack:28720 pid:30746 ppid:4651   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline]
 synchronize_rcu_expedited+0x706/0x770 kernel/rcu/tree_exp.h:990
 synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3481
 synchronize_net+0x4e/0x60 net/core/dev.c:10749
 __unregister_prot_hook+0x4c5/0x5e0 net/packet/af_packet.c:382
 packet_do_bind+0x8f8/0xe30 net/packet/af_packet.c:3227
 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311
 __sys_bind+0x1ed/0x260 net/socket.c:1776
 __do_sys_bind net/socket.c:1787 [inline]
 __se_sys_bind net/socket.c:1785 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82fc264ce7
RSP: 002b:00007fffa501eab8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000559c76493b60 RCX: 00007f82fc264ce7
RDX: 0000000000000014 RSI: 00007fffa501eac8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000559c77d651c0 R09: 00007f82fc325a60
R10: 0000000000200000 R11: 0000000000000217 R12: 0000559c77d62740
R13: 0000559c77d650a8 R14: 00007fffa503f39c R15: 00007fffa503f3c4
 </TASK>
1 lock held by dhcpcd/30746:
 #0: 
ffff88803f61c130 (sk_lock-AF_PACKET){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1725 [inline]
, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3194
task:dhcpcd          state:D stack:29096 pid:30747 ppid:4651   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 schedule+0xde/0x1b0 kernel/sched/core.c:6646
 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline]
 synchronize_rcu_expedited+0x706/0x770 kernel/rcu/tree_exp.h:990
 synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3481
 synchronize_net+0x4e/0x60 net/core/dev.c:10749
 __unregister_prot_hook+0x4c5/0x5e0 net/packet/af_packet.c:382
 packet_do_bind+0x8f8/0xe30 net/packet/af_packet.c:3227
 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311
 __sys_bind+0x1ed/0x260 net/socket.c:1776
 __do_sys_bind net/socket.c:1787 [inline]
 __se_sys_bind net/socket.c:1785 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1785
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82fc264ce7
RSP: 002b:00007fffa501eab8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000559c76493b60 RCX: 00007f82fc264ce7
RDX: 0000000000000014 RSI: 00007fffa501eac8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000559c77d65340 R09: 00007f82fc325a60
R10: 0000000000200000 R11: 0000000000000217 R12: 0000559c77d62740
R13: 0000559c77d65228 R14: 00007fffa503f39c R15: 00007fffa503f3c4
 </TASK>
1 lock held by dhcpcd/30747:
 #0: ffff88803d1f8130 (
sk_lock-AF_PACKET
){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline]
){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3194

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xcae/0x1050 kernel/hung_task.c:377
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 30741 Comm: syz-executor.1 Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:461
Code: 95 09 fd 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 4c 7c 57 fd eb a6 e8 a5 7c 57 fd eb e3
RSP: 0018:ffffc90004e9f350 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff84781770 RDI: ffffffff91eee7c0
RBP: ffffffff91eee780 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff23ddd48 R15: dffffc0000000000
FS:  00007f86a2a09700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559c764bf600 CR3: 00000000ad943000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 serial_in drivers/tty/serial/8250/8250.h:118 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:140 [inline]
 wait_for_lsr+0xd7/0x180 drivers/tty/serial/8250/8250_port.c:2086
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3357 [inline]
 serial8250_console_write+0xccf/0x1010 drivers/tty/serial/8250/8250_port.c:3435
 call_console_driver kernel/printk/printk.c:2031 [inline]
 console_emit_next_record.constprop.0+0x3d8/0x890 kernel/printk/printk.c:2823
 console_flush_all+0x547/0x6e0 kernel/printk/printk.c:2887
 console_unlock+0xb8/0x1f0 kernel/printk/printk.c:2964
 vprintk_emit+0x1bd/0x600 kernel/printk/printk.c:2357
 vprintk+0x84/0xa0 kernel/printk/printk_safe.c:50
 _printk+0xbe/0xf1 kernel/printk/printk.c:2378
 mt_dump_range+0x62/0x6b lib/maple_tree.c:6706
 mt_dump_entry+0x2d/0xf4 lib/maple_tree.c:6712
 mt_dump_range64 lib/maple_tree.c:6747 [inline]
 mt_dump_node+0x3ec/0x927 lib/maple_tree.c:6829
 mt_dump_arange64 lib/maple_tree.c:6792 [inline]
 mt_dump_node+0x851/0x927 lib/maple_tree.c:6832
 mt_dump.cold+0xf2/0x115 lib/maple_tree.c:6849
 mt_find.cold+0x48/0x90 lib/maple_tree.c:6473
 find_vma+0x10c/0x1b0 mm/mmap.c:1850
 walk_page_range+0x2b1/0x4a0 mm/pagewalk.c:463
 mlock_vma_pages_range mm/mlock.c:386 [inline]
 mlock_fixup+0x650/0x810 mm/mlock.c:462
 apply_vma_lock_flags+0x23d/0x350 mm/mlock.c:506
 do_mlock+0x25a/0x6d0 mm/mlock.c:601
 __do_sys_mlock2 mm/mlock.c:628 [inline]
 __se_sys_mlock2 mm/mlock.c:618 [inline]
 __x64_sys_mlock2+0xc1/0x100 mm/mlock.c:618
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f86a1c8c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f86a2a09168 EFLAGS: 00000246 ORIG_RAX: 0000000000000145
RAX: ffffffffffffffda RBX: 00007f86a1dabf80 RCX: 00007f86a1c8c0c9
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffb000
RBP: 00007f86a1ce7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2983887f R14: 00007f86a2a09300 R15: 0000000000022000
 </TASK>