INFO: task syz-executor.2:32035 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc3-next-20230321-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:27896 pid:32035 ppid:5124   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5305 [inline]
 __schedule+0x1d23/0x5650 kernel/sched/core.c:6623
 schedule+0xde/0x1a0 kernel/sched/core.c:6699
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6758
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
 eventpoll_release include/linux/eventpoll.h:53 [inline]
 __fput+0x7da/0xa90 fs/file_table.c:312
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 get_signal+0x1c7/0x25b0 kernel/signal.c:2635
 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7d2688c0f9
RSP: 002b:00007f7d2755b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007f7d269abf80 RCX: 00007f7d2688c0f9
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007f7d268e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbde719df R14: 00007f7d2755b300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/9:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8c7958f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8c7955f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffffffff8c796500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
1 lock held by syslogd/4430:
2 locks held by getty/4764:
 #0: ffff88814a4c7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
4 locks held by syz-executor.1/26478:
4 locks held by kworker/1:3/28366:
3 locks held by kworker/u4:1/31535:
1 lock held by syz-executor.2/32035:
 #0: ffff8880761dd868 (&ep->mtx){+.+.}-{3:3}, at: eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
1 lock held by syz-executor.2/32041:
4 locks held by syz-executor.3/32611:
3 locks held by syz-executor.3/32612:
 #0: ffffffff8e0f2510 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
 #1: ffff88802b9e4270 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
 #1: ffff88802b9e4270 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: rxrpc_bind+0xa8/0x5a0 net/rxrpc/af_rxrpc.c:145
 #2: ffff8880762a81d8 (&rxnet->local_mutex){+.+.}-{3:3}, at: rxrpc_lookup_local+0xcb/0x11d0 net/rxrpc/local_object.c:251

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc3-next-20230321-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x33e/0x440 kernel/kthread.c:379
 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: 32611 Comm: syz-executor.3 Not tainted 6.3.0-rc3-next-20230321-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:unwind_next_frame+0x0/0x1ef0 arch/x86/kernel/unwind_orc.c:442
Code: 89 0c 24 e8 62 15 9d 00 48 8b 0c 24 e9 0d ff ff ff e8 54 15 9d 00 e9 67 ff ff ff e8 4a 15 9d 00 e9 3a ff ff ff 0f 1f 44 00 00 <f3> 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 41 57 48 c1 ea
RSP: 0018:ffffc9000d61efb0 EFLAGS: 00000216
RAX: 1ffff92001ac3e08 RBX: ffffc9000d61f090 RCX: ffffc9000d61f098
RDX: ffffc9000d620000 RSI: 1ffff92001ac3e03 RDI: ffffc9000d61f008
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffc9000d61f008
R10: 0000000000000000 R11: 0000000000000000 R12: fffff52001ac3e03
R13: fffff52001ac3e02 R14: ffffc9000d61f040 R15: ffffc9000d61f008
FS:  00007f7d3d277700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020369030 CR3: 000000007bdfe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __unwind_start+0x51f/0x800 arch/x86/kernel/unwind_orc.c:735
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x60/0xf0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 save_stack+0x151/0x1e0 mm/page_owner.c:128
 __set_page_owner+0x1f/0x60 mm/page_owner.c:192
 prep_new_page mm/page_alloc.c:2479 [inline]
 get_page_from_freelist+0xf75/0x2ab0 mm/page_alloc.c:4243
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5509
 __folio_alloc+0x16/0x40 mm/page_alloc.c:5541
 vma_alloc_folio+0x155/0x850 mm/mempolicy.c:2244
 wp_page_copy mm/memory.c:3070 [inline]
 do_wp_page+0x17e7/0x3530 mm/memory.c:3432
 handle_pte_fault mm/memory.c:4945 [inline]
 __handle_mm_fault+0x1d02/0x4030 mm/memory.c:5070
 handle_mm_fault+0x2c0/0x9c0 mm/memory.c:5216
 do_user_addr_fault+0x51a/0x1210 arch/x86/mm/fault.c:1440
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:__put_user_nocheck_4+0xb/0x20 arch/x86/lib/putuser.S:105
Code: 0f 1e fa 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 70 0f 01 cb 89 01 31 c9 0f 01 ca c3 66 90 f3 0f 1e fa f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3
RSP: 0018:ffffc9000d61fa00 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000020369030
RDX: 0000000000040000 RSI: ffffffff87fe6eac RDI: 0000000000000005
RBP: ffffc9000d61fdb0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000020369030 R14: 0000000000000002 R15: 0000000000000000
 ____sys_recvmsg+0x2f7/0x5a0 net/socket.c:2733
 ___sys_recvmsg+0xf2/0x180 net/socket.c:2762
 do_recvmmsg+0x25e/0x6e0 net/socket.c:2856
 __sys_recvmmsg net/socket.c:2935 [inline]
 __do_sys_recvmmsg net/socket.c:2958 [inline]
 __se_sys_recvmmsg net/socket.c:2951 [inline]
 __x64_sys_recvmmsg+0x20f/0x260 net/socket.c:2951
 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: 0033:0x7f7d3c48c0f9
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:00007f7d3d277168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f7d3c5ac050 RCX: 00007f7d3c48c0f9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00007f7d3c4e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffebfdf268f R14: 00007f7d3d277300 R15: 0000000000022000
 </TASK>