[ 25.805769][ T259] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 25.914672][ T265] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 26.009421][ T263] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 27.093392][ T292] ip (292) used greatest stack depth: 24016 bytes left [ 54.642307][ T680] ip (680) used greatest stack depth: 23464 bytes left [ 55.268050][ T694] [ 55.268144][ T694] ====================================================== [ 55.268303][ T694] WARNING: possible circular locking dependency detected [ 55.268455][ T694] 6.12.0-rc5-virtme #1 Not tainted [ 55.268587][ T694] ------------------------------------------------------ [ 55.268750][ T694] modprobe/694 is trying to acquire lock: [ 55.268879][ T694] ffffffffc061a420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 55.269112][ T694] [ 55.269112][ T694] but task is already holding lock: [ 55.269302][ T694] ffffffffacfd3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 55.269530][ T694] [ 55.269530][ T694] which lock already depends on the new lock. [ 55.269530][ T694] [ 55.269765][ T694] [ 55.269765][ T694] the existing dependency chain (in reverse order) is: [ 55.269986][ T694] [ 55.269986][ T694] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 55.270178][ T694] __lock_acquire+0xb3f/0x1580 [ 55.270321][ T694] lock_acquire.part.0+0xeb/0x330 [ 55.270449][ T694] __mutex_lock+0x149/0xac0 [ 55.270576][ T694] rtnl_newlink+0x64b/0xa30 [ 55.270707][ T694] rtnetlink_rcv_msg+0x712/0xc10 [ 55.270836][ T694] netlink_rcv_skb+0x130/0x360 [ 55.270972][ T694] netlink_unicast+0x44b/0x710 [ 55.271098][ T694] netlink_sendmsg+0x723/0xbe0 [ 55.271233][ T694] ____sys_sendmsg+0x7ac/0xa10 [ 55.271364][ T694] ___sys_sendmsg+0xee/0x170 [ 55.271499][ T694] __sys_sendmsg+0xcd/0x170 [ 55.271643][ T694] do_syscall_64+0xc1/0x1d0 [ 55.271774][ T694] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.271934][ T694] [ 55.271934][ T694] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 55.272124][ T694] check_prev_add+0x182/0xce0 [ 55.272249][ T694] validate_chain+0x71d/0x9b0 [ 55.272379][ T694] __lock_acquire+0xb3f/0x1580 [ 55.272505][ T694] lock_sync+0xd7/0x180 [ 55.272634][ T694] __synchronize_srcu+0x9e/0x2b0 [ 55.272760][ T694] __rtnl_link_unregister+0x14a/0x380 [ 55.272926][ T694] rtnl_link_unregister+0x14c/0x1c0 [ 55.273052][ T694] nsim_module_exit+0x10/0x1a [netdevsim] [ 55.273241][ T694] __do_sys_delete_module+0x2bd/0x470 [ 55.273409][ T694] do_syscall_64+0xc1/0x1d0 [ 55.273544][ T694] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.273706][ T694] [ 55.273706][ T694] other info that might help us debug this: [ 55.273706][ T694] [ 55.273953][ T694] Possible unsafe locking scenario: [ 55.273953][ T694] [ 55.274141][ T694] CPU0 CPU1 [ 55.274266][ T694] ---- ---- [ 55.274394][ T694] lock(rtnl_mutex); [ 55.274491][ T694] lock(&ops->srcu); [ 55.274652][ T694] lock(rtnl_mutex); [ 55.274810][ T694] sync(&ops->srcu); [ 55.274908][ T694] [ 55.274908][ T694] *** DEADLOCK *** [ 55.274908][ T694] [ 55.275090][ T694] 2 locks held by modprobe/694: [ 55.275219][ T694] #0: ffffffffacfb8650 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 55.275480][ T694] #1: ffffffffacfd3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 55.275719][ T694] [ 55.275719][ T694] stack backtrace: [ 55.275873][ T694] CPU: 3 UID: 0 PID: 694 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 55.276060][ T694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 55.276347][ T694] Call Trace: [ 55.276450][ T694] [ 55.276520][ T694] dump_stack_lvl+0x82/0xd0 [ 55.276651][ T694] print_circular_bug+0x2e2/0x4b0 [ 55.276780][ T694] check_noncircular+0x2f9/0x3e0 [ 55.276910][ T694] ? __pfx_check_noncircular+0x10/0x10 [ 55.277040][ T694] ? __kernel_text_address+0x12/0x40 [ 55.277171][ T694] ? unwind_get_return_address+0x5e/0xa0 [ 55.277304][ T694] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 55.277463][ T694] ? arch_stack_walk+0xa2/0xf0 [ 55.277591][ T694] ? alloc_chain_hlocks+0x4e0/0x720 [ 55.277720][ T694] check_prev_add+0x182/0xce0 [ 55.277845][ T694] ? __pfx_stack_trace_save+0x10/0x10 [ 55.277982][ T694] validate_chain+0x71d/0x9b0 [ 55.278117][ T694] ? __pfx_validate_chain+0x10/0x10 [ 55.278247][ T694] ? mark_lock+0x335/0x3e0 [ 55.278374][ T694] ? __pfx_validate_chain+0x10/0x10 [ 55.278504][ T694] __lock_acquire+0xb3f/0x1580 [ 55.278633][ T694] lock_sync+0xd7/0x180 [ 55.278727][ T694] ? __synchronize_srcu+0x21/0x2b0 [ 55.278855][ T694] __synchronize_srcu+0x9e/0x2b0 [ 55.278981][ T694] ? __pfx___synchronize_srcu+0x10/0x10 [ 55.279105][ T694] ? hlock_class+0x4e/0x130 [ 55.279238][ T694] ? mark_lock+0x38/0x3e0 [ 55.279336][ T694] ? kvm_clock_get_cycles+0x18/0x30 [ 55.279463][ T694] ? ktime_get_mono_fast_ns+0x84/0x360 [ 55.279597][ T694] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 55.279759][ T694] __rtnl_link_unregister+0x14a/0x380 [ 55.279886][ T694] ? mark_lock+0x38/0x3e0 [ 55.279990][ T694] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 55.280152][ T694] ? mark_held_locks+0x9e/0xe0 [ 55.280281][ T694] rtnl_link_unregister+0x14c/0x1c0 [ 55.280419][ T694] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 55.280559][ T694] ? __pfx_woken_wake_function+0x10/0x10 [ 55.280688][ T694] nsim_module_exit+0x10/0x1a [netdevsim] [ 55.280826][ T694] __do_sys_delete_module+0x2bd/0x470 [ 55.280957][ T694] ? __pfx___do_sys_delete_module+0x10/0x10 [ 55.281111][ T694] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 55.281268][ T694] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 55.281424][ T694] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 55.281554][ T694] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 55.281711][ T694] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 55.281870][ T694] do_syscall_64+0xc1/0x1d0 [ 55.282001][ T694] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.282162][ T694] RIP: 0033:0x7f5e511df5ab [ 55.282296][ T694] 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 [ 55.282746][ T694] RSP: 002b:00007ffe185015e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 55.282936][ T694] RAX: ffffffffffffffda RBX: 000055e1124c4980 RCX: 00007f5e511df5ab [ 55.283126][ T694] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055e1124c49e8 [ 55.283315][ T694] RBP: 000055e1124c4980 R08: 0000000000000000 R09: 0000000000000000 [ 55.283520][ T694] R10: 00007f5e5133eac0 R11: 0000000000000206 R12: 000055e1124c49e8 [ 55.283712][ T694] R13: 0000000000000000 R14: 000055e1124c49e8 R15: 00007ffe18503918 [ 55.283903][ T694]