[ 25.418060][ T257] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 25.509334][ T268] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 25.618835][ T262] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 26.555576][ T290] ip (290) used greatest stack depth: 24056 bytes left [ 54.106786][ T692] [ 54.106880][ T692] ====================================================== [ 54.107037][ T692] WARNING: possible circular locking dependency detected [ 54.107193][ T692] 6.12.0-rc5-virtme #1 Not tainted [ 54.107319][ T692] ------------------------------------------------------ [ 54.107478][ T692] modprobe/692 is trying to acquire lock: [ 54.107603][ T692] ffffffffc026d420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 54.107846][ T692] [ 54.107846][ T692] but task is already holding lock: [ 54.108032][ T692] ffffffffabfd3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 54.108260][ T692] [ 54.108260][ T692] which lock already depends on the new lock. [ 54.108260][ T692] [ 54.108503][ T692] [ 54.108503][ T692] the existing dependency chain (in reverse order) is: [ 54.108717][ T692] [ 54.108717][ T692] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 54.108907][ T692] __lock_acquire+0xb3f/0x1580 [ 54.109042][ T692] lock_acquire.part.0+0xeb/0x330 [ 54.109170][ T692] __mutex_lock+0x149/0xac0 [ 54.109298][ T692] rtnl_newlink+0x64b/0xa30 [ 54.109422][ T692] rtnetlink_rcv_msg+0x712/0xc10 [ 54.109550][ T692] netlink_rcv_skb+0x130/0x360 [ 54.109677][ T692] netlink_unicast+0x44b/0x710 [ 54.109804][ T692] netlink_sendmsg+0x723/0xbe0 [ 54.109928][ T692] ____sys_sendmsg+0x7ac/0xa10 [ 54.110067][ T692] ___sys_sendmsg+0xee/0x170 [ 54.110196][ T692] __sys_sendmsg+0xcd/0x170 [ 54.110322][ T692] do_syscall_64+0xc1/0x1d0 [ 54.110451][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.110607][ T692] [ 54.110607][ T692] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 54.110796][ T692] check_prev_add+0x182/0xce0 [ 54.110924][ T692] validate_chain+0x71d/0x9b0 [ 54.111053][ T692] __lock_acquire+0xb3f/0x1580 [ 54.111180][ T692] lock_sync+0xd7/0x180 [ 54.111307][ T692] __synchronize_srcu+0x9e/0x2b0 [ 54.111432][ T692] __rtnl_link_unregister+0x14a/0x380 [ 54.111588][ T692] rtnl_link_unregister+0x14c/0x1c0 [ 54.111714][ T692] nsim_module_exit+0x10/0x1a [netdevsim] [ 54.111896][ T692] __do_sys_delete_module+0x2bd/0x470 [ 54.112053][ T692] do_syscall_64+0xc1/0x1d0 [ 54.112178][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.112335][ T692] [ 54.112335][ T692] other info that might help us debug this: [ 54.112335][ T692] [ 54.112581][ T692] Possible unsafe locking scenario: [ 54.112581][ T692] [ 54.112763][ T692] CPU0 CPU1 [ 54.112886][ T692] ---- ---- [ 54.113009][ T692] lock(rtnl_mutex); [ 54.113107][ T692] lock(&ops->srcu); [ 54.113262][ T692] lock(rtnl_mutex); [ 54.113430][ T692] sync(&ops->srcu); [ 54.113526][ T692] [ 54.113526][ T692] *** DEADLOCK *** [ 54.113526][ T692] [ 54.113705][ T692] 2 locks held by modprobe/692: [ 54.113831][ T692] #0: ffffffffabfb8650 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 54.114086][ T692] #1: ffffffffabfd3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 54.114307][ T692] [ 54.114307][ T692] stack backtrace: [ 54.114463][ T692] CPU: 3 UID: 0 PID: 692 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 54.114650][ T692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 54.114925][ T692] Call Trace: [ 54.115023][ T692] <TASK> [ 54.115088][ T692] dump_stack_lvl+0x82/0xd0 [ 54.115217][ T692] print_circular_bug+0x2e2/0x4b0 [ 54.115344][ T692] check_noncircular+0x2f9/0x3e0 [ 54.115474][ T692] ? __pfx_check_noncircular+0x10/0x10 [ 54.115603][ T692] ? __kernel_text_address+0x12/0x40 [ 54.115731][ T692] ? unwind_get_return_address+0x5e/0xa0 [ 54.115859][ T692] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 54.116022][ T692] ? arch_stack_walk+0xa2/0xf0 [ 54.116151][ T692] ? alloc_chain_hlocks+0x4e0/0x720 [ 54.116277][ T692] check_prev_add+0x182/0xce0 [ 54.116408][ T692] ? __pfx_stack_trace_save+0x10/0x10 [ 54.116535][ T692] validate_chain+0x71d/0x9b0 [ 54.116664][ T692] ? __pfx_validate_chain+0x10/0x10 [ 54.116790][ T692] ? mark_lock+0x335/0x3e0 [ 54.116916][ T692] ? __pfx_validate_chain+0x10/0x10 [ 54.117043][ T692] __lock_acquire+0xb3f/0x1580 [ 54.117173][ T692] lock_sync+0xd7/0x180 [ 54.117267][ T692] ? __synchronize_srcu+0x21/0x2b0 [ 54.117394][ T692] __synchronize_srcu+0x9e/0x2b0 [ 54.117520][ T692] ? __pfx___synchronize_srcu+0x10/0x10 [ 54.117647][ T692] ? hlock_class+0x4e/0x130 [ 54.117774][ T692] ? mark_lock+0x38/0x3e0 [ 54.117870][ T692] ? kvm_clock_get_cycles+0x18/0x30 [ 54.118001][ T692] ? ktime_get_mono_fast_ns+0x84/0x360 [ 54.118130][ T692] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 54.118293][ T692] __rtnl_link_unregister+0x14a/0x380 [ 54.118421][ T692] ? mark_lock+0x38/0x3e0 [ 54.118523][ T692] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 54.118681][ T692] ? mark_held_locks+0x9e/0xe0 [ 54.118806][ T692] rtnl_link_unregister+0x14c/0x1c0 [ 54.118934][ T692] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 54.119066][ T692] ? __pfx_woken_wake_function+0x10/0x10 [ 54.119194][ T692] nsim_module_exit+0x10/0x1a [netdevsim] [ 54.119339][ T692] __do_sys_delete_module+0x2bd/0x470 [ 54.119464][ T692] ? __pfx___do_sys_delete_module+0x10/0x10 [ 54.119620][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 54.119780][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 54.119935][ T692] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 54.120072][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 54.120233][ T692] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 54.120396][ T692] do_syscall_64+0xc1/0x1d0 [ 54.120526][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.120684][ T692] RIP: 0033:0x7f32327835ab [ 54.120815][ T692] 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 [ 54.121257][ T692] RSP: 002b:00007fff5a200458 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 54.121452][ T692] RAX: ffffffffffffffda RBX: 0000564657ac9980 RCX: 00007f32327835ab [ 54.121639][ T692] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000564657ac99e8 [ 54.121827][ T692] RBP: 0000564657ac9980 R08: 0000000000000000 R09: 0000000000000000 [ 54.122016][ T692] R10: 00007f32328e2ac0 R11: 0000000000000206 R12: 0000564657ac99e8 [ 54.122208][ T692] R13: 0000000000000000 R14: 0000564657ac99e8 R15: 00007fff5a202788 [ 54.122400][ T692] </TASK>