INFO: task syz.0.2923:16890 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2923      state:D stack:25352 pid:16890 tgid:16889 ppid:5836   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x724/0xe80
 nfsd_nl_listener_set_doit+0x12a/0x1650
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff2158e929
RSP: 002b:00007eff2245a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007eff217b5fa0 RCX: 00007eff2158e929
RDX: 00000000000444c0 RSI: 00002000000005c0 RDI: 0000000000000003
RBP: 00007eff21610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007eff217b5fa0 R15: 00007ffd836b4338
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13f160 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kswapd1/91:
2 locks held by dhcpcd/5575:
2 locks held by getty/5656:
 #0: ffff8880262a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by sshd/5754:
2 locks held by kworker/u9:12/6878:
 #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006b87bc0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
2 locks held by syz.2.2350/14760:
 #0: ffffffff8f583b70 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e41d708 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x12a/0x1650
3 locks held by syz-executor/15502:
2 locks held by syz.0.2923/16890:
 #0: ffffffff8f583b70 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e41d708 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x12a/0x1650
3 locks held by syz.4.4166/21115:
 #0: ffffffff8f583b70 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffff888108a9f6d0 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0xfe/0x7e0
 #2: ffffffff8e41d708 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xd9/0x1280
2 locks held by syz-executor/21249:
1 lock held by syz.1.4230/21366:
 #0: ffffffff8e144b40 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
2 locks held by syz-executor/21986:
2 locks held by syz.3.4711/23040:
3 locks held by syz.6.4735/23132:
4 locks held by syz-executor/23135:
2 locks held by modprobe/23136:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686 #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+0xfee/0x1030
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 21986 Comm: syz-executor Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686 #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:folio_mapping+0x112/0x240
Code: 89 f6 48 83 e6 01 31 ff e8 fb 66 bd ff 49 83 e6 01 0f 85 25 01 00 00 48 89 df be 08 00 00 00 e8 24 e7 20 00 43 80 7c 3d 00 00 <74> 08 48 89 df e8 a4 e4 20 00 4c 8b 33 4c 89 f6 48 81 e6 00 04 00
RSP: 0000:ffffc90006f26918 EFLAGS: 00000246
RAX: ffffffff8202d401 RBX: ffffea0000b7fd00 RCX: ffffffff8202d46c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0000b7fd00
RBP: 0000000000020000 R08: ffffea0000b7fd07 R09: 1ffffd400016ffa0
R10: dffffc0000000000 R11: fffff9400016ffa1 R12: 1ffffd400016ffa1
R13: 1ffffd400016ffa0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00005555595c9500(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79597deae3 CR3: 000000003ca16000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_evictable+0xc8/0x250
 evict_folios+0x4597/0x5500
 try_to_shrink_lruvec+0x705/0x990
 shrink_one+0x21b/0x7c0
 shrink_node+0x314e/0x3760
 do_try_to_free_pages+0x66b/0x1960
 try_to_free_pages+0x8a2/0xdd0
 __alloc_pages_direct_reclaim+0x144/0x300
 __alloc_pages_slowpath+0x5ff/0xce0
 __alloc_frozen_pages_noprof+0x319/0x370
 alloc_pages_mpol+0x232/0x4a0
 alloc_pages_noprof+0xa9/0x190
 folio_alloc_noprof+0x1e/0x30
 filemap_alloc_folio_noprof+0xdf/0x470
 __filemap_get_folio+0x3f2/0xaf0
 filemap_fault+0x89d/0x1200
 __do_fault+0x138/0x390
 __handle_mm_fault+0x37ed/0x5620
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f5e9e265974
Code: Unable to access opcode bytes at 0x7f5e9e26594a.
RSP: 002b:00007ffe41710500 EFLAGS: 00010206
RAX: 0000001b31220000 RBX: 000000000000014d RCX: 000000000005eba0
RDX: 000000000f17e32b RSI: 00007ffe41710590 RDI: 0000000000000001
RBP: 00007ffe4171053c R08: 0000000039938f84 R09: 7fffffffffffffff
R10: 3fffffffffffffff R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000005dbd9 R15: 00007ffe41710590
 </TASK>
