INFO: task syz.2.3140:19837 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3140      state:D stack:25352 pid:19837 tgid:19836 ppid:5854   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 nfsd_nl_listener_set_doit+0x137/0x1690
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 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: 0033:0x7fe81458ebe9
RSP: 002b:00007fe815498038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe8147b5fa0 RCX: 00007fe81458ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 000000000000000b
RBP: 00007fe814611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe8147b6038 R14: 00007fe8147b5fa0 R15: 00007ffd20a44f58
 </TASK>
INFO: task syz.1.3156:19912 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3156      state:D stack:25896 pid:19912 tgid:19911 ppid:5850   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 nfsd_nl_listener_set_doit+0x137/0x1690
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 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: 0033:0x7f41cb18ebe9
RSP: 002b:00007f41cc009038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f41cb3b5fa0 RCX: 00007f41cb18ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 000000000000000b
RBP: 00007f41cb211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f41cb3b6038 R14: 00007f41cb3b5fa0 R15: 00007ffc470ac9b8
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by kswapd1/90:
1 lock held by klogd/5282:
3 locks held by udevd/5293:
2 locks held by getty/5677:
 #0: ffff88810d92c0a0 (&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
1 lock held by sshd/5834:
 #0: ffff888108a05200 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x86a/0x1200
2 locks held by syz-executor/5836:
2 locks held by syz.0.3132/19803:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.2.3140/19837:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.1.3156/19912:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.4.3169/20018:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.3.3192/20125:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.5.3264/20437:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.5.3264/20438:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.6.3272/20484:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.7.3297/20580:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.9.3320/20727:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.8.3375/20930:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.0.3473/21361:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.2.3495/21441:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
2 locks held by syz.1.3508/21481:
 #0: ffffffff8f59deb0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e418588 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x137/0x1690
1 lock held by syz-executor/21603:

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 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: 5834 Comm: sshd 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:kasan_check_range+0xb/0x2c0
Code: ff 90 0f 0b cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 55 <41> 54 53 b0 01 48 85 f6 0f 84 ba 01 00 00 4c 8d 04 37 49 39 f8 0f
RSP: 0000:ffffc900032a6018 EFLAGS: 00000246
RAX: 1ffffd4000300051 RBX: ffffea0001800280 RCX: ffffffff82157d7f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0001800280
RBP: ffffea0001800288 R08: ffffffff8fa38a37 R09: 1ffffffff1f47146
R10: dffffc0000000000 R11: fffffbfff1f47147 R12: 000000000006000a
R13: ffffea0001800280 R14: ffffea0001800288 R15: 0000000000000000
FS:  00007fd1cbd20800(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1cbd211a8 CR3: 000000010df6c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 free_unref_folios+0x25f/0x1520
 shrink_folio_list+0x44dd/0x4cd0
 evict_folios+0x47f2/0x58b0
 try_to_shrink_lruvec+0x8a3/0xb50
 shrink_one+0x21b/0x7c0
 shrink_node+0x314e/0x3760
 do_try_to_free_pages+0x668/0x1960
 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
 folio_alloc_mpol_noprof+0x39/0x70
 __read_swap_cache_async+0x166/0x510
 swap_cluster_readahead+0x4cf/0x5f0
 swapin_readahead+0x17d/0xb50
 do_swap_page+0x525/0x5ac0
 __handle_mm_fault+0xe55/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:__get_user_8+0x14/0x30
Code: 00 e9 90 02 04 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 ba 00 f0 ff ff ff 7f 00 00 48 39 d0 48 0f 47 c2 0f 1f 00 <48> 8b 10 31 c0 0f 1f 00 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0000:ffffc900032a7dd8 EFLAGS: 00010283
RAX: 00007fd1cbd211a8 RBX: ffff888020a2ebb0 RCX: 5131a0b54ae5e600
RDX: 00007ffffffff000 RSI: ffffffff8dba6d0d RDI: ffffffff8be33680
RBP: ffffc900032a7ef0 R08: 0000000000000000 R09: ffffffff820b7d00
R10: dffffc0000000000 R11: fffff52000654fb5 R12: dffffc0000000000
R13: ffffc900032a7fd8 R14: 00007fd1cbd211a8 R15: ffff888020a2d640
 __rseq_handle_notify_resume+0x137/0x11f0
 irqentry_exit_to_user_mode+0x90/0x120
 exc_page_fault+0x9f/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fd1cbb4721c
Code: c4 98 00 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 8b 47 04 c3 48 8b 07 8b 40 04 c3 8b 47 30 c3 48 8b 07 89 c9 ff 60 20 <48> 8b 07 c3 8b 47 10 c3 48 8b 47 10 c3 48 8b 47 60 c3 48 89 77 60
RSP: 002b:00007ffe875afd68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000559bd57b0520 RCX: 0000000000000000
RDX: 000000000000009c RSI: 00007fd1cbbfc4cc RDI: 0000559bd57b0520
RBP: 00007ffe875afde8 R08: 00007ffe875afde8 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
