[ 296.114272][ T2481] netdevsim netdevsim1337 eni1337np1: renamed from eth0
[ 336.565103][ T2828] Failed to register fib notifier
[ 406.899424][ T3420] Failed to register fib notifier
[ 448.410451][ T3789] Failed to register fib notifier
[ 514.196004][ T4378] Failed to register fib notifier
[ 516.622504][ T4409]
[ 516.622610][ T4409] ======================================================
[ 516.622788][ T4409] WARNING: possible circular locking dependency detected
[ 516.622968][ T4409] 6.12.0-rc5-virtme #1 Not tainted
[ 516.623111][ T4409] ------------------------------------------------------
[ 516.623290][ T4409] modprobe/4409 is trying to acquire lock:
[ 516.623465][ T4409] ffffffffc04c44e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0
[ 516.623744][ T4409]
[ 516.623744][ T4409] but task is already holding lock:
[ 516.623973][ T4409] ffffffff913d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 516.624229][ T4409]
[ 516.624229][ T4409] which lock already depends on the new lock.
[ 516.624229][ T4409]
[ 516.624507][ T4409]
[ 516.624507][ T4409] the existing dependency chain (in reverse order) is:
[ 516.624774][ T4409]
[ 516.624774][ T4409] -> #1 (rtnl_mutex){+.+.}-{3:3}:
[ 516.624998][ T4409] __lock_acquire+0xb3f/0x1580
[ 516.625147][ T4409] lock_acquire.part.0+0xeb/0x330
[ 516.625323][ T4409] __mutex_lock+0x149/0xac0
[ 516.625470][ T4409] rtnl_newlink+0x64f/0xa20
[ 516.625608][ T4409] rtnetlink_rcv_msg+0x712/0xc10
[ 516.625766][ T4409] netlink_rcv_skb+0x130/0x360
[ 516.625908][ T4409] netlink_unicast+0x44b/0x710
[ 516.626044][ T4409] netlink_sendmsg+0x723/0xbe0
[ 516.626179][ T4409] ____sys_sendmsg+0x7ac/0xa10
[ 516.626319][ T4409] ___sys_sendmsg+0xee/0x170
[ 516.626455][ T4409] __sys_sendmsg+0xcd/0x170
[ 516.626594][ T4409] do_syscall_64+0xc1/0x1d0
[ 516.626729][ T4409] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 516.626905][ T4409]
[ 516.626905][ T4409] -> #0 (&ops->srcu){.+.+}-{0:0}:
[ 516.627114][ T4409] check_prev_add+0x182/0xce0
[ 516.627256][ T4409] validate_chain+0x71d/0x9b0
[ 516.627392][ T4409] __lock_acquire+0xb3f/0x1580
[ 516.627529][ T4409] lock_sync+0xd7/0x180
[ 516.627669][ T4409] __synchronize_srcu+0x9e/0x2b0
[ 516.627805][ T4409] __rtnl_link_unregister+0x14a/0x380
[ 516.627980][ T4409] rtnl_link_unregister+0x14c/0x1c0
[ 516.628120][ T4409] nsim_module_exit+0x10/0x1a [netdevsim]
[ 516.628309][ T4409] __do_sys_delete_module+0x2bd/0x470
[ 516.628487][ T4409] do_syscall_64+0xc1/0x1d0
[ 516.628630][ T4409] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 516.628802][ T4409]
[ 516.628802][ T4409] other info that might help us debug this:
[ 516.628802][ T4409]
[ 516.629068][ T4409] Possible unsafe locking scenario:
[ 516.629068][ T4409]
[ 516.629274][ T4409] CPU0 CPU1
[ 516.629416][ T4409] ---- ----
[ 516.629558][ T4409] lock(rtnl_mutex);
[ 516.629667][ T4409] lock(&ops->srcu);
[ 516.629867][ T4409] lock(rtnl_mutex);
[ 516.630038][ T4409] sync(&ops->srcu);
[ 516.630146][ T4409]
[ 516.630146][ T4409] *** DEADLOCK ***
[ 516.630146][ T4409]
[ 516.630335][ T4409] 2 locks held by modprobe/4409:
[ 516.630469][ T4409] #0: ffffffff913b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0
[ 516.630732][ T4409] #1: ffffffff913d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 516.630951][ T4409]
[ 516.630951][ T4409] stack backtrace:
[ 516.631102][ T4409] CPU: 1 UID: 0 PID: 4409 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1
[ 516.631291][ T4409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 516.631585][ T4409] Call Trace:
[ 516.631702][ T4409] <TASK>
[ 516.631777][ T4409] dump_stack_lvl+0x82/0xd0
[ 516.631919][ T4409] print_circular_bug+0x2e2/0x4b0
[ 516.632057][ T4409] check_noncircular+0x2f9/0x3e0
[ 516.632215][ T4409] ? __pfx_check_noncircular+0x10/0x10
[ 516.632359][ T4409] ? __kernel_text_address+0x12/0x40
[ 516.632500][ T4409] ? unwind_get_return_address+0x5e/0xa0
[ 516.632640][ T4409] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 516.632814][ T4409] ? arch_stack_walk+0xa2/0xf0
[ 516.632962][ T4409] check_prev_add+0x182/0xce0
[ 516.633121][ T4409] ? __pfx_stack_trace_save+0x10/0x10
[ 516.633261][ T4409] validate_chain+0x71d/0x9b0
[ 516.633411][ T4409] ? __pfx_validate_chain+0x10/0x10
[ 516.633576][ T4409] ? mark_lock+0x335/0x3e0
[ 516.633712][ T4409] ? __pfx_validate_chain+0x10/0x10
[ 516.633857][ T4409] __lock_acquire+0xb3f/0x1580
[ 516.634004][ T4409] lock_sync+0xd7/0x180
[ 516.634105][ T4409] ? __synchronize_srcu+0x21/0x2b0
[ 516.634240][ T4409] __synchronize_srcu+0x9e/0x2b0
[ 516.634376][ T4409] ? __pfx___synchronize_srcu+0x10/0x10
[ 516.634512][ T4409] ? hlock_class+0x4e/0x130
[ 516.634682][ T4409] ? mark_lock+0x38/0x3e0
[ 516.634791][ T4409] ? kvm_clock_get_cycles+0x18/0x30
[ 516.634933][ T4409] ? ktime_get_mono_fast_ns+0x84/0x360
[ 516.635109][ T4409] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 516.635283][ T4409] __rtnl_link_unregister+0x14a/0x380
[ 516.635424][ T4409] ? mark_lock+0x38/0x3e0
[ 516.635553][ T4409] ? __pfx___rtnl_link_unregister+0x10/0x10
[ 516.635725][ T4409] ? mark_held_locks+0x9e/0xe0
[ 516.635875][ T4409] rtnl_link_unregister+0x14c/0x1c0
[ 516.636014][ T4409] ? __pfx_rtnl_link_unregister+0x10/0x10
[ 516.636178][ T4409] ? __pfx_woken_wake_function+0x10/0x10
[ 516.636324][ T4409] nsim_module_exit+0x10/0x1a [netdevsim]
[ 516.636520][ T4409] __do_sys_delete_module+0x2bd/0x470
[ 516.636660][ T4409] ? __pfx___do_sys_delete_module+0x10/0x10
[ 516.636836][ T4409] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 516.637029][ T4409] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 516.637198][ T4409] ? trace_rcu_segcb_stats+0x37/0x1e0
[ 516.637353][ T4409] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 516.637531][ T4409] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 516.637722][ T4409] do_syscall_64+0xc1/0x1d0
[ 516.637862][ T4409] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 516.638050][ T4409] RIP: 0033:0x7fdcd71e85ab
[ 516.638198][ T4409] Code: 73 01 c3 48 8b 0d 55 98 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 25 98 1b 00 f7 d8 64 89 01 48
[ 516.638986][ T4409] RSP: 002b:00007ffc46ffa6f8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 516.639195][ T4409] RAX: ffffffffffffffda RBX: 00005556840cd980 RCX: 00007fdcd71e85ab
[ 516.639479][ T4409] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005556840cd9e8
[ 516.639760][ T4409] RBP: 00005556840cd980 R08: 0000000000000000 R09: 0000000000000000
[ 516.640066][ T4409] R10: 00007fdcd7347ac0 R11: 0000000000000206 R12: 00005556840cd9e8
[ 516.640457][ T4409] R13: 0000000000000000 R14: 00005556840cd9e8 R15: 00007ffc46ffca28
[ 516.640773][ T4409] </TASK>