INFO: task syz.8.1006:16363 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1006      state:D stack:24664 pid:16363 tgid:16362 ppid:15408  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x250
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a3e79cdd9
RSP: 002b:00007f4a3c9f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f4a3ea15fa0 RCX: 00007f4a3e79cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4a3ea15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a3ea16038 R14: 00007f4a3ea15fa0 R15: 00007ffe90a7fc38
 </TASK>
INFO: task syz.8.1006:16382 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1006      state:D stack:22776 pid:16382 tgid:16362 ppid:15408  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x250
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a3e79cdd9
RSP: 002b:00007f4a3c9d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f4a3ea16090 RCX: 00007f4a3e79cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4a3ea16090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a3ea16128 R14: 00007f4a3ea16090 R15: 00007ffe90a7fc38
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5439:
 #0: ffff88810d07b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by kworker/0:4/5675:
 #0: ffff88812103aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffff888121024588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff8881723790a0 (&r->consumer_lock#2){+.+.}-{3:3}, at: wg_packet_decrypt_worker+0x8d7/0xd80
2 locks held by syz-executor/15619:
1 lock held by syz.8.1006/16363:
 #0: ffff88816d16c0d8 (&type->s_umount_key#83){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.8.1006/16382:
 #0: ffff88816d16c0d8 (&type->s_umount_key#83){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.1189/18379:
 #0: ffff88816d16c0d8 (&type->s_umount_key#83){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.8.1394/20101:
3 locks held by syz.5.1396/20109:

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

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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 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: 20101 Comm: syz.8.1394 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_acquire+0x874/0x2cf0
Code: c1 c6 08 31 c6 01 ca 29 f1 89 f3 c1 c3 10 31 cb 01 d6 29 da 89 dd c1 c5 13 31 d5 01 f3 29 ee 01 eb c1 c5 04 31 f5 48 c1 e5 20 <83> 3d 29 2c 8f 0e 00 4d 89 e5 0f 85 1f 02 00 00 48 83 7c 24 28 00
RSP: 0018:ffffc90003f070b8 EFLAGS: 00000086
RAX: 000000000eef3c70 RBX: 00000000c151ba70 RCX: 000000004f5ff1f2
RDX: 00000000637c602d RSI: 00000000c20572c2 RDI: ffff88816b513b00
RBP: d5cd59b500000000 R08: ffffffff8238ab0e R09: ffffffff8e95cd60
R10: dffffc0000000000 R11: fffff940001210cf R12: ffff88816b514708
R13: ffff88816b514708 R14: ffff88816b513b00 R15: 0000000000000003
FS:  00007f5d260ef6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c7c9ea2f8 CR3: 0000000110e4e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350
 lruvec_stat_mod_folio+0x8a/0x3e0
 folio_remove_rmap_ptes+0x352/0xe70
 __zap_vma_range+0x20c4/0x4b40
 unmap_vmas+0x379/0x530
 unmap_region+0x208/0x330
 vms_complete_munmap_vmas+0x493/0xc60
 do_vmi_align_munmap+0x3b7/0x4b0
 do_vmi_munmap+0x252/0x2d0
 __vm_munmap+0x22c/0x3d0
 __x64_sys_munmap+0x60/0x70
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d2519cc07
Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d260eee08 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f5d2519cc07
RDX: 0000000001000000 RSI: 0000000008400000 RDI: 00007f5d1ae00000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f5d260eeee0 R14: 00007f5d260eeea0 R15: 00007f5d1ae00000
 </TASK>
