INFO: task syz-executor.0:2610 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.0  state:D
 stack:28256 pid:2610  ppid:5106   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
 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]
 exit_mm kernel/exit.c:539 [inline]
 do_exit+0x88c/0x2a90 kernel/exit.c:854
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1012
 __do_sys_exit_group kernel/exit.c:1023 [inline]
 __se_sys_exit_group kernel/exit.c:1021 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1021
 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: 0033:0x7f2d27e8c0c9
RSP: 002b:00007ffcda2748e8 EFLAGS: 00000246
 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f2d27e8c0c9
RDX: 00007f2d27e3df7b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 000000005acfc6ac R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcda2749d0
 </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:22392 pid:4751  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: 0033:0x7fbe703a28fe
RSP: 002b:00007fffc1a36938 EFLAGS: 00000246
 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005609fecb8910 RCX: 00007fbe703a28fe
RDX: 0000000000000001 RSI: 00007fffc1a36950 RDI: 0000000000000000
RBP: 00005609fecb8970 R08: 0000000000000007 R09: 00005609fecb9cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 00005609fecb89ac
R13: 00007fffc1a36950 R14: 0000000000000000 R15: 00005609fecb89ac
 </TASK>
2 locks held by getty/4751:
 #0: ffff88802c253098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor.0  state:D
 stack:28256 pid:2610  ppid:5106   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
 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]
 exit_mm kernel/exit.c:539 [inline]
 do_exit+0x88c/0x2a90 kernel/exit.c:854
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1012
 __do_sys_exit_group kernel/exit.c:1023 [inline]
 __se_sys_exit_group kernel/exit.c:1021 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1021
 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: 0033:0x7f2d27e8c0c9
RSP: 002b:00007ffcda2748e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f2d27e8c0c9
RDX: 00007f2d27e3df7b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 000000005acfc6ac R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcda2749d0
 </TASK>
1 lock held by syz-executor.0/2610:
 #0: ffff88801db2e498 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 #0: ffff88801db2e498 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm kernel/exit.c:539 [inline]
 #0: ffff88801db2e498 (&mm->mmap_lock){++++}-{3:3}, at: do_exit+0x88c/0x2a90 kernel/exit.c:854
task:syz-executor.0  state:R  running task     stack:26928 pid:2611  ppid:5106   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
 vprintk_emit+0x1ee/0x600 kernel/printk/printk.c:2358
 vprintk+0x84/0xa0 kernel/printk/printk_safe.c:50
 _printk+0xbe/0xf1 kernel/printk/printk.c:2378
 mt_find.cold+0x3e/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: 0033:0x7f2d27e8c0c9
RSP: 002b:00007f2d28cba168 EFLAGS: 00000246
 ORIG_RAX: 0000000000000145
RAX: ffffffffffffffda RBX: 00007f2d27fabf80 RCX: 00007f2d27e8c0c9
RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020ffd000
RBP: 00007f2d27ee7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcda2746af R14: 00007f2d28cba300 R15: 0000000000022000
 </TASK>
1 lock held by syz-executor.0/2611:
task:syz-executor.0  state:D stack:28256 pid:2683  ppid:2670   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: 0033:0x7f095f4276c6
RSP: 002b:00007fffe1367c98 EFLAGS: 00010287
RAX: 0000001b32928000 RBX: 00007f095f5ac018 RCX: 0000001b32920000
RDX: 0000001b32928004 RSI: 0000001b32927c04 RDI: 00000000f26e3d22
RBP: 00000000f26e3d22 R08: 0000001b32f20000 R09: 00000000f26e3d26
R10: 00007fffe13e5090 R11: 0000000000039fbc R12: 00007f095f5a0000
R13: 0000000000000001 R14: 0000000000002519 R15: ffffffff8166cb9f
 </TASK>
1 lock held by syz-executor.0/2683:
 #0: 
ffff88802c194098
 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.0  state:R
  running task    
 stack:26928 pid:2684  ppid:2670   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5252 [inline]
 __schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
 </TASK>
4 locks held by syz-executor.0/2684:
task:syz-executor.0  state:D stack:28256 pid:2736  ppid:2722   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: 0033:0x7f60a74276c6
RSP: 002b:00007fff26981028 EFLAGS: 00010287
RAX: 0000001b2dd28000 RBX: 00007f60a75ac018 RCX: 0000001b2dd20000
RDX: 0000001b2dd28004 RSI: 0000001b2dd27b2c RDI: 00000000398a34d4
RBP: 00000000398a34d4 R08: 0000001b2e320000 R09: 00000000398a34d8
R10: 00007fff26986090 R11: 000000000003c400 R12: 00007f60a75a0000
R13: 0000000000000001 R14: 0000000000002731 R15: ffffffff816664c1
 </TASK>
1 lock held by syz-executor.0/2736:
 #0: ffff88807a86ae98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 #0: ffff88807a86ae98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.0  state:R  running task     stack:26928 pid:2737  ppid:2722   flags:0x0000400e
Call Trace:
 <TASK>
 </TASK>
1 lock held by syz-executor.0/2737:

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

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: 2737 Comm: syz-executor.0 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:write_comp_data+0x15/0x90 kernel/kcov.c:230
Code: b8 03 00 48 8b 80 68 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 d1 0f 82 7e 49 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 <49> 89 f8 65 48 8b 14 25 80 b8 03 00 a9 00 01 ff 00 74 0e 85 f6 74
RSP: 0018:ffffc9000cb371f8 EFLAGS: 00000246
RAX: 0000000080000001 RBX: 0000000000000000 RCX: ffffffff89b85a2e
RDX: 000000000000005b RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000cb37318 R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000005b R11: 0000000000000000 R12: ffffc9000cb37580
R13: ffffffff8a4d1fc0 R14: 1ffff92001966e43 R15: 000000000000005b
FS:  00007f60a823a700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c017dec740 CR3: 0000000076b44000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 format_decode+0x12e/0xb50 lib/vsprintf.c:2530
 vsnprintf+0x15d/0x16b0 lib/vsprintf.c:2748
 sprintf+0xc4/0x100 lib/vsprintf.c:3000
 print_time kernel/printk/printk.c:1357 [inline]
 info_print_prefix+0x248/0x340 kernel/printk/printk.c:1383
 record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1432
 console_emit_next_record.constprop.0+0x714/0x890 kernel/printk/printk.c:2806
 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.cold+0x4c/0x115 lib/maple_tree.c:6844
 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: 0033:0x7f60a748c0c9
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:00007f60a823a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000145
RAX: ffffffffffffffda RBX: 00007f60a75abf80 RCX: 00007f60a748c0c9
RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020ffd000
RBP: 00007f60a74e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2698105f R14: 00007f60a823a300 R15: 0000000000022000
 </TASK>