INFO: task syz.3.1688:13409 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1688      state:D stack:25288 pid:13409 tgid:13408 ppid:12877  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 nfsd_nl_threads_get_doit+0x1c0/0x790
 genl_family_rcv_msg_doit+0x22a/0x330
 genl_rcv_msg+0x61c/0x7a0
 netlink_rcv_skb+0x232/0x4b0
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 ____sys_sendmsg+0x972/0x9f0
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1bd/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7cd239cdd9
RSP: 002b:00007f7cd05f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7cd2615fa0 RCX: 00007f7cd239cdd9
RDX: 0000000020048000 RSI: 0000200000000000 RDI: 0000000000000008
RBP: 00007f7cd2432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7cd2616038 R14: 00007f7cd2615fa0 R15: 00007ffcf59c0378
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by klogd/5046:
 #0: ffff88812103b020 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
2 locks held by getty/5437:
 #0: ffff88816cf260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by syz.1.868/9212:
 #0: ffffffff8fe3f888 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8ec8c5e0 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x141/0x1670
2 locks held by syz.3.1688/13409:
 #0: ffffffff8fe3f888 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8ec8c5e0 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_threads_get_doit+0x1c0/0x790
3 locks held by syz.1.2368/16457:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16457 Comm: syz.1.2368 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:psi_group_change+0x8e4/0x1050
Code: 4c 89 c3 e8 be 4d 91 00 49 89 d8 48 be 00 00 00 00 00 fc ff df 49 c7 c7 d8 9f 3a 93 4d 03 3e 4c 89 f8 48 c1 e8 03 80 3c 30 00 <74> 18 4c 89 ff 4c 89 c3 e8 8f 4d 91 00 49 89 d8 48 be 00 00 00 00
RSP: 0018:ffffc90000a08d38 EFLAGS: 00000046
RAX: 1ffff110478c75fb RBX: ffff88823c624488 RCX: 0000000000000190
RDX: 0000000000000110 RSI: dffffc0000000000 RDI: 0000000000000000
RBP: 0000000000000190 R08: ffff88823c624480 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffed1023fef61e R12: 00000082967ab139
R13: 0000000000000004 R14: ffffffff8e268798 R15: ffff88823c63afd8
FS:  00007fb863c7d6c0(0000) GS:ffff8882a9291000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8599ff000 CR3: 000000011263c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 psi_task_change+0x113/0x340
 enqueue_task+0x33f/0x410
 ttwu_do_activate+0x1cc/0x660
 sched_ttwu_pending+0x255/0x5e0
 __flush_smp_call_function_queue+0x85d/0xa90
 __sysvec_call_function_single+0x9a/0x3d0
 sysvec_call_function_single+0x9e/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:__mem_cgroup_charge+0x4/0x80
Code: 4c 89 f6 eb a5 5b 41 5e c3 cc cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <55> 41 56 53 89 d5 49 89 fe 48 89 f7 e8 fb 1f ff ff 48 89 c3 4c 89
RSP: 0018:ffffc90008917878 EFLAGS: 00000206
RAX: ffffffff820e1e01 RBX: 0000000000000001 RCX: ffffffff820e1ef5
RDX: 0000000000000cc0 RSI: 0000000000000000 RDI: ffffea00071cdf80
RBP: ffffc900089179d0 R08: ffffea00071cdf87 R09: 1ffffd4000e39bf0
R10: dffffc0000000000 R11: fffff94000e39bf1 R12: ffffea00071cdf88
R13: ffffea00071cdf80 R14: 0000000000000cc0 R15: 0000000000000000
 shmem_alloc_and_add_folio+0x7cc/0xf80
 shmem_get_folio_gfp+0x5a9/0x1670
 shmem_write_begin+0x16c/0x330
 generic_perform_write+0x2e2/0x8f0
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb862d5d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fb863c7cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb863c7d6c0 RCX: 00007fb862d5d60e
RDX: 0000000001000000 RSI: 00007fb858a00000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007fb863c7cee0 R14: 00007fb863c7cea0 R15: 00007fb858a00000
 </TASK>
