[ 300.184229][ T2480] netdevsim netdevsim1337 eni1337np1: renamed from eth0
[ 300.365493][ T2482] devlink (2482) used greatest stack depth: 24144 bytes left
[ 338.747182][ T2829] Failed to register fib notifier
[ 362.349121][ T3077] ip (3077) used greatest stack depth: 24032 bytes left
[ 404.027879][ T3419] Failed to register fib notifier
[ 404.321186][ T3421] ip (3421) used greatest stack depth: 23696 bytes left
[ 443.872598][ T3787] Failed to register fib notifier
[ 508.906993][ T4377] Failed to register fib notifier
[ 511.184565][ T4408]
[ 511.184667][ T4408] ======================================================
[ 511.184855][ T4408] WARNING: possible circular locking dependency detected
[ 511.185059][ T4408] 6.12.0-rc5-virtme #1 Not tainted
[ 511.185209][ T4408] ------------------------------------------------------
[ 511.185396][ T4408] modprobe/4408 is trying to acquire lock:
[ 511.185580][ T4408] ffffffffc040d4e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0
[ 511.185846][ T4408]
[ 511.185846][ T4408] but task is already holding lock:
[ 511.186060][ T4408] ffffffffb09d4908 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 511.186329][ T4408]
[ 511.186329][ T4408] which lock already depends on the new lock.
[ 511.186329][ T4408]
[ 511.186619][ T4408]
[ 511.186619][ T4408] the existing dependency chain (in reverse order) is:
[ 511.186863][ T4408]
[ 511.186863][ T4408] -> #1 (rtnl_mutex){+.+.}-{3:3}:
[ 511.187081][ T4408] __lock_acquire+0xb3f/0x1580
[ 511.187233][ T4408] lock_acquire.part.0+0xeb/0x330
[ 511.187378][ T4408] __mutex_lock+0x149/0xac0
[ 511.187528][ T4408] rtnl_newlink+0x64f/0xa20
[ 511.187688][ T4408] rtnetlink_rcv_msg+0x712/0xc10
[ 511.187829][ T4408] netlink_rcv_skb+0x130/0x360
[ 511.187973][ T4408] netlink_unicast+0x44b/0x710
[ 511.188117][ T4408] netlink_sendmsg+0x723/0xbe0
[ 511.188261][ T4408] ____sys_sendmsg+0x7ac/0xa10
[ 511.188416][ T4408] ___sys_sendmsg+0xee/0x170
[ 511.188568][ T4408] __sys_sendmsg+0xcd/0x170
[ 511.188716][ T4408] do_syscall_64+0xc1/0x1d0
[ 511.188865][ T4408] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 511.189047][ T4408]
[ 511.189047][ T4408] -> #0 (&ops->srcu){.+.+}-{0:0}:
[ 511.189276][ T4408] check_prev_add+0x182/0xce0
[ 511.189437][ T4408] validate_chain+0x71d/0x9b0
[ 511.189584][ T4408] __lock_acquire+0xb3f/0x1580
[ 511.189730][ T4408] lock_sync+0xd7/0x180
[ 511.189880][ T4408] __synchronize_srcu+0x9e/0x2b0
[ 511.190028][ T4408] __rtnl_link_unregister+0x14a/0x380
[ 511.190203][ T4408] rtnl_link_unregister+0x14c/0x1c0
[ 511.190358][ T4408] nsim_module_exit+0x10/0x1a [netdevsim]
[ 511.190558][ T4408] __do_sys_delete_module+0x2bd/0x470
[ 511.190738][ T4408] do_syscall_64+0xc1/0x1d0
[ 511.190868][ T4408] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 511.191052][ T4408]
[ 511.191052][ T4408] other info that might help us debug this:
[ 511.191052][ T4408]
[ 511.191317][ T4408] Possible unsafe locking scenario:
[ 511.191317][ T4408]
[ 511.191508][ T4408] CPU0 CPU1
[ 511.191642][ T4408] ---- ----
[ 511.191779][ T4408] lock(rtnl_mutex);
[ 511.191899][ T4408] lock(&ops->srcu);
[ 511.192062][ T4408] lock(rtnl_mutex);
[ 511.192225][ T4408] sync(&ops->srcu);
[ 511.192326][ T4408]
[ 511.192326][ T4408] *** DEADLOCK ***
[ 511.192326][ T4408]
[ 511.192513][ T4408] 2 locks held by modprobe/4408:
[ 511.192647][ T4408] #0: ffffffffb09b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0
[ 511.192931][ T4408] #1: ffffffffb09d4908 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 511.193182][ T4408]
[ 511.193182][ T4408] stack backtrace:
[ 511.193355][ T4408] CPU: 1 UID: 0 PID: 4408 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1
[ 511.193572][ T4408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 511.193908][ T4408] Call Trace:
[ 511.194024][ T4408] <TASK>
[ 511.194106][ T4408] dump_stack_lvl+0x82/0xd0
[ 511.194270][ T4408] print_circular_bug+0x2e2/0x4b0
[ 511.194405][ T4408] check_noncircular+0x2f9/0x3e0
[ 511.194540][ T4408] ? __pfx_check_noncircular+0x10/0x10
[ 511.194693][ T4408] ? __kernel_text_address+0x12/0x40
[ 511.194914][ T4408] ? unwind_get_return_address+0x5e/0xa0
[ 511.195065][ T4408] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 511.195267][ T4408] ? arch_stack_walk+0xa2/0xf0
[ 511.195427][ T4408] check_prev_add+0x182/0xce0
[ 511.195639][ T4408] ? __pfx_stack_trace_save+0x10/0x10
[ 511.195794][ T4408] validate_chain+0x71d/0x9b0
[ 511.195952][ T4408] ? __pfx_validate_chain+0x10/0x10
[ 511.196104][ T4408] ? mark_lock+0x335/0x3e0
[ 511.196334][ T4408] ? __pfx_validate_chain+0x10/0x10
[ 511.196489][ T4408] __lock_acquire+0xb3f/0x1580
[ 511.196654][ T4408] lock_sync+0xd7/0x180
[ 511.196775][ T4408] ? __synchronize_srcu+0x21/0x2b0
[ 511.196925][ T4408] __synchronize_srcu+0x9e/0x2b0
[ 511.197079][ T4408] ? __pfx___synchronize_srcu+0x10/0x10
[ 511.197231][ T4408] ? hlock_class+0x4e/0x130
[ 511.197385][ T4408] ? mark_lock+0x38/0x3e0
[ 511.197569][ T4408] ? kvm_clock_get_cycles+0x18/0x30
[ 511.197799][ T4408] ? ktime_get_mono_fast_ns+0x84/0x360
[ 511.197952][ T4408] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 511.198132][ T4408] __rtnl_link_unregister+0x14a/0x380
[ 511.198284][ T4408] ? mark_lock+0x38/0x3e0
[ 511.198396][ T4408] ? __pfx___rtnl_link_unregister+0x10/0x10
[ 511.198661][ T4408] ? mark_held_locks+0x9e/0xe0
[ 511.198813][ T4408] rtnl_link_unregister+0x14c/0x1c0
[ 511.198959][ T4408] ? __pfx_rtnl_link_unregister+0x10/0x10
[ 511.199187][ T4408] ? __pfx_woken_wake_function+0x10/0x10
[ 511.199346][ T4408] nsim_module_exit+0x10/0x1a [netdevsim]
[ 511.199585][ T4408] __do_sys_delete_module+0x2bd/0x470
[ 511.199734][ T4408] ? __pfx___do_sys_delete_module+0x10/0x10
[ 511.199917][ T4408] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 511.200100][ T4408] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 511.200284][ T4408] ? trace_rcu_segcb_stats+0x37/0x1e0
[ 511.200429][ T4408] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 511.200767][ T4408] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 511.200962][ T4408] do_syscall_64+0xc1/0x1d0
[ 511.201114][ T4408] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 511.201299][ T4408] RIP: 0033:0x7f80b28cf5ab
[ 511.201454][ T4408] 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
[ 511.201965][ T4408] RSP: 002b:00007ffdf4874ee8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 511.202266][ T4408] RAX: ffffffffffffffda RBX: 0000556e34385980 RCX: 00007f80b28cf5ab
[ 511.202485][ T4408] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000556e343859e8
[ 511.202780][ T4408] RBP: 0000556e34385980 R08: 0000000000000000 R09: 0000000000000000
[ 511.202974][ T4408] R10: 00007f80b2a2eac0 R11: 0000000000000206 R12: 0000556e343859e8
[ 511.203199][ T4408] R13: 0000000000000000 R14: 0000556e343859e8 R15: 00007ffdf4877218
[ 511.203498][ T4408] </TASK>