======================================
| [   26.562382][  T255] other info that might help us debug this:
| [   26.562563][  T255] no locks held by ip/255.
| [   26.562687][  T255]
| [   26.562687][  T255] stack backtrace:
[   26.563031][  T255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   26.563328][  T255] Call Trace:
[   26.563436][  T255]  <TASK>
[ 26.563507][ T255] dump_stack_lvl (lib/dump_stack.c:123) 
[ 26.563655][ T255] ? __rtnl_unlock (net/core/rtnetlink.c:140 (discriminator 3)) 
[ 26.563783][ T255] print_unlock_imbalance_bug (kernel/locking/lockdep.c:5266) 
[ 26.563910][ T255] __lock_release (kernel/locking/lockdep.c:5502) 
[ 26.564036][ T255] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 26.564183][ T255] ? __rtnl_unlock (net/core/rtnetlink.c:140 (discriminator 3)) 
[ 26.564312][ T255] lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5848) 
[ 26.564440][ T255] __mutex_unlock_slowpath (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:921) 
[ 26.564579][ T255] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 26.564705][ T255] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:907) 
[ 26.564864][ T255] ? rtnl_link_ops_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:558) 
[ 26.564991][ T255] __rtnl_unlock (net/core/rtnetlink.c:140 (discriminator 3)) 
[ 26.565115][ T255] rtnl_newlink (net/core/rtnetlink.c:3961) 
[ 26.565243][ T255] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3919) 
[ 26.565369][ T255] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 26.565498][ T255] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 26.565622][ T255] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6926) 
[ 26.565749][ T255] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 26.565883][ T255] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6926) 
[ 26.566003][ T255] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3919) 
[ 26.566121][ T255] rtnetlink_rcv_msg (net/core/rtnetlink.c:6928) 
[ 26.566240][ T255] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6831) 
[ 26.566359][ T255] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 26.566479][ T255] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 26.566569][ T255] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 26.566688][ T255] netlink_rcv_skb (net/netlink/af_netlink.c:2536) 
[ 26.566829][ T255] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6831) 
[ 26.566955][ T255] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2513) 
[ 26.567084][ T255] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 26.567211][ T255] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 26.567335][ T255] netlink_unicast (net/netlink/af_netlink.c:1316 net/netlink/af_netlink.c:1342) 
[ 26.567461][ T255] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1327) 
[ 26.567587][ T255] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 26.567714][ T255] netlink_sendmsg (net/netlink/af_netlink.c:1886) 
[ 26.567840][ T255] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1805) 
[ 26.567988][ T255] ____sys_sendmsg (net/socket.c:729 net/socket.c:744 net/socket.c:2609) 
[ 26.568124][ T255] ? __pfx_____sys_sendmsg (net/socket.c:2555) 
[ 26.568241][ T255] ? __pfx_copy_msghdr_from_user (net/socket.c:2535) 
[ 26.568388][ T255] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 26.568507][ T255] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3794 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 26.568626][ T255] ___sys_sendmsg (net/socket.c:2665) 
[ 26.568744][ T255] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 26.568862][ T255] ? __pfx____sys_sendmsg (net/socket.c:2652) 
[ 26.568983][ T255] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 26.569104][ T255] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 26.569222][ T255] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 26.569340][ T255] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) 
[ 26.569461][ T255] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[ 26.569552][ T255] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[ 26.569673][ T255] __sys_sendmsg (./include/linux/file.h:35 net/socket.c:2694) 
[ 26.569791][ T255] ? __pfx___sys_sendmsg (net/socket.c:2680) 
[ 26.569941][ T255] ? rseq_update_cpu_node_id (kernel/rseq.c:109 (discriminator 10)) 
[ 26.570080][ T255] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.570210][ T255] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.570369][  T255] RIP: 0033:0x7fac87ff87b7
[ 26.570503][ T255] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   26.570957][  T255] RSP: 002b:00007ffe683679c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   26.571164][  T255] RAX: ffffffffffffffda RBX: 00007ffe683680f0 RCX: 00007fac87ff87b7
[   26.571342][  T255] RDX: 0000000000000000 RSI: 00007ffe68367a30 RDI: 0000000000000005
[   26.571522][  T255] RBP: 0000000000000003 R08: 000000000000005c R09: 0000000000000002
[   26.571698][  T255] R10: 00007fac87eb1708 R11: 0000000000000246 R12: 00007ffe68368108
[   26.571880][  T255] R13: 00000000672a0756 R14: 0000000000496600 R15: 00007ffe68367b18
| [   26.571342][  T255] RDX: 0000000000000000 RSI: 00007ffe68367a30 RDI: 0000000000000005
| [   26.571522][  T255] RBP: 0000000000000003 R08: 000000000000005c R09: 0000000000000002
| [   26.571698][  T255] R10: 00007fac87eb1708 R11: 0000000000000246 R12: 00007ffe68368108
| [   26.571880][  T255] R13: 00000000672a0756 R14: 0000000000496600 R15: 00007ffe68367b18
| [   26.572068][  T255]  </TASK>
[  247.113654][   T43] INFO: task ip:255 blocked for more than 122 seconds.
[  247.114294][   T43]       Not tainted 6.12.0-rc5-virtme #1
[  247.114558][   T43] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  247.114817][   T43] task:ip              state:D stack:25672 pid:255   tgid:255   ppid:241    flags:0x00004002
[  247.115117][   T43] Call Trace:
[  247.115223][   T43]  <TASK>
[ 247.115321][ T43] __schedule (kernel/sched/core.c:5328 kernel/sched/core.c:6690) 
[ 247.115610][ T43] ? __pfx___schedule (kernel/sched/core.c:6546) 
[ 247.115759][ T43] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 247.115898][ T43] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 52)) 
[ 247.116020][ T43] schedule (./arch/x86/include/asm/preempt.h:84 kernel/sched/core.c:6768 kernel/sched/core.c:6782) 
[ 247.116119][ T43] schedule_preempt_disabled (./arch/x86/include/asm/preempt.h:79 kernel/sched/core.c:6840) 
[ 247.116258][ T43] __mutex_lock (kernel/locking/mutex.c:197 kernel/locking/mutex.c:686 kernel/locking/mutex.c:752) 
[ 247.116385][ T43] ? rtnl_newlink (net/core/rtnetlink.c:321 net/core/rtnetlink.c:4025) 
[ 247.116506][ T43] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 247.116633][ T43] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 247.116752][ T43] ? rtnl_newlink (net/core/rtnetlink.c:321 net/core/rtnetlink.c:4025) 
[ 247.116876][ T43] rtnl_newlink (net/core/rtnetlink.c:321 net/core/rtnetlink.c:4025) 
[ 247.116997][ T43] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3919) 
[ 247.117117][ T43] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 247.117237][ T43] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 247.117370][ T43] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6926) 
[ 247.117492][ T43] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3919) 
[ 247.117612][ T43] rtnetlink_rcv_msg (net/core/rtnetlink.c:6928) 
[ 247.117753][ T43] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6831) 
[ 247.117869][ T43] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 247.117984][ T43] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 247.118071][ T43] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 247.118187][ T43] netlink_rcv_skb (net/netlink/af_netlink.c:2536) 
[ 247.118306][ T43] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6831) 
[ 247.118436][ T43] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2513) 
[ 247.118604][ T43] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 247.118733][ T43] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 247.118851][ T43] netlink_unicast (net/netlink/af_netlink.c:1316 net/netlink/af_netlink.c:1342) 
[ 247.118975][ T43] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1327) 
[ 247.119094][ T43] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 247.119213][ T43] netlink_sendmsg (net/netlink/af_netlink.c:1886) 
[ 247.119344][ T43] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1805) 
[ 247.119468][ T43] ____sys_sendmsg (net/socket.c:729 net/socket.c:744 net/socket.c:2609) 
[ 247.119588][ T43] ? __pfx_____sys_sendmsg (net/socket.c:2555) 
[ 247.119709][ T43] ? __pfx_copy_msghdr_from_user (net/socket.c:2535) 
[ 247.119863][ T43] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 247.119983][ T43] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3794 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 247.120097][ T43] ___sys_sendmsg (net/socket.c:2665) 
[ 247.120210][ T43] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 247.120323][ T43] ? __pfx____sys_sendmsg (net/socket.c:2652) 
[ 247.120446][ T43] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 247.120568][ T43] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 247.120685][ T43] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 247.120797][ T43] ? __might_fault (mm/memory.c:6716 mm/memory.c:6709) 
[ 247.120912][ T43] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[ 247.121004][ T43] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[ 247.121118][ T43] __sys_sendmsg (./include/linux/file.h:35 net/socket.c:2694) 
[ 247.121230][ T43] ? __pfx___sys_sendmsg (net/socket.c:2680) 
[ 247.121351][ T43] ? rseq_update_cpu_node_id (kernel/rseq.c:109 (discriminator 10)) 
[ 247.121496][ T43] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 247.121611][ T43] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  247.121758][   T43] RIP: 0033:0x7fac87ff87b7
[  247.121877][   T43] RSP: 002b:00007ffe683679c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  247.122053][   T43] RAX: ffffffffffffffda RBX: 00007ffe683680f0 RCX: 00007fac87ff87b7
[  247.122221][   T43] RDX: 0000000000000000 RSI: 00007ffe68367a30 RDI: 0000000000000005
[  247.122402][   T43] RBP: 0000000000000003 R08: 000000000000005c R09: 0000000000000002
[  247.122604][   T43] R10: 00007fac87eb1708 R11: 0000000000000246 R12: 00007ffe68368108


Finger prints:
print_unlock_imbalance_bug:__lock_release:lock_release:__mutex_unlock_slowpath:__rtnl_unlock
__schedule:schedule:schedule_preempt_disabled:__mutex_lock:rtnl_newlink