[ 27.061030][ T268] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 27.136510][ T266] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 27.250967][ T263] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 28.207952][ T292] ip (292) used greatest stack depth: 23896 bytes left [ 30.960945][ T268] (udev-worker) (268) used greatest stack depth: 23264 bytes left [ 56.968277][ T693] [ 56.968374][ T693] ====================================================== [ 56.968530][ T693] WARNING: possible circular locking dependency detected [ 56.968693][ T693] 6.12.0-rc5-virtme #1 Not tainted [ 56.968828][ T693] ------------------------------------------------------ [ 56.968996][ T693] modprobe/693 is trying to acquire lock: [ 56.969137][ T693] ffffffffc05624e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 56.969382][ T693] [ 56.969382][ T693] but task is already holding lock: [ 56.969583][ T693] ffffffffa31d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.969827][ T693] [ 56.969827][ T693] which lock already depends on the new lock. [ 56.969827][ T693] [ 56.970088][ T693] [ 56.970088][ T693] the existing dependency chain (in reverse order) is: [ 56.970312][ T693] [ 56.970312][ T693] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 56.970519][ T693] __lock_acquire+0xb3f/0x1580 [ 56.970663][ T693] lock_acquire.part.0+0xeb/0x330 [ 56.970795][ T693] __mutex_lock+0x149/0xac0 [ 56.970920][ T693] rtnl_newlink+0x64f/0xa20 [ 56.971051][ T693] rtnetlink_rcv_msg+0x712/0xc10 [ 56.971184][ T693] netlink_rcv_skb+0x130/0x360 [ 56.971320][ T693] netlink_unicast+0x44b/0x710 [ 56.971455][ T693] netlink_sendmsg+0x723/0xbe0 [ 56.971585][ T693] ____sys_sendmsg+0x7ac/0xa10 [ 56.971717][ T693] ___sys_sendmsg+0xee/0x170 [ 56.971848][ T693] __sys_sendmsg+0xcd/0x170 [ 56.971984][ T693] do_syscall_64+0xc1/0x1d0 [ 56.972118][ T693] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.972291][ T693] [ 56.972291][ T693] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 56.972497][ T693] check_prev_add+0x182/0xce0 [ 56.972643][ T693] validate_chain+0x71d/0x9b0 [ 56.972770][ T693] __lock_acquire+0xb3f/0x1580 [ 56.972908][ T693] lock_sync+0xd7/0x180 [ 56.973034][ T693] __synchronize_srcu+0x9e/0x2b0 [ 56.973164][ T693] __rtnl_link_unregister+0x14a/0x380 [ 56.973325][ T693] rtnl_link_unregister+0x14c/0x1c0 [ 56.973455][ T693] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.973629][ T693] __do_sys_delete_module+0x2bd/0x470 [ 56.973788][ T693] do_syscall_64+0xc1/0x1d0 [ 56.973913][ T693] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.974075][ T693] [ 56.974075][ T693] other info that might help us debug this: [ 56.974075][ T693] [ 56.974320][ T693] Possible unsafe locking scenario: [ 56.974320][ T693] [ 56.974510][ T693] CPU0 CPU1 [ 56.974647][ T693] ---- ---- [ 56.974783][ T693] lock(rtnl_mutex); [ 56.974881][ T693] lock(&ops->srcu); [ 56.975053][ T693] lock(rtnl_mutex); [ 56.975224][ T693] sync(&ops->srcu); [ 56.975323][ T693] [ 56.975323][ T693] *** DEADLOCK *** [ 56.975323][ T693] [ 56.975517][ T693] 2 locks held by modprobe/693: [ 56.975656][ T693] #0: ffffffffa31b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 56.975936][ T693] #1: ffffffffa31d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.976166][ T693] [ 56.976166][ T693] stack backtrace: [ 56.976321][ T693] CPU: 1 UID: 0 PID: 693 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 56.976519][ T693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 56.976820][ T693] Call Trace: [ 56.976923][ T693] [ 56.976994][ T693] dump_stack_lvl+0x82/0xd0 [ 56.977142][ T693] print_circular_bug+0x2e2/0x4b0 [ 56.977279][ T693] check_noncircular+0x2f9/0x3e0 [ 56.977411][ T693] ? __pfx_check_noncircular+0x10/0x10 [ 56.977542][ T693] ? __kernel_text_address+0x12/0x40 [ 56.977675][ T693] ? unwind_get_return_address+0x5e/0xa0 [ 56.977817][ T693] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 56.977982][ T693] ? arch_stack_walk+0xa2/0xf0 [ 56.978119][ T693] ? alloc_chain_hlocks+0x4e0/0x720 [ 56.978259][ T693] check_prev_add+0x182/0xce0 [ 56.978388][ T693] ? __pfx_stack_trace_save+0x10/0x10 [ 56.978528][ T693] validate_chain+0x71d/0x9b0 [ 56.978664][ T693] ? __pfx_validate_chain+0x10/0x10 [ 56.978804][ T693] ? mark_lock+0x335/0x3e0 [ 56.978935][ T693] ? __pfx_validate_chain+0x10/0x10 [ 56.979064][ T693] __lock_acquire+0xb3f/0x1580 [ 56.979209][ T693] lock_sync+0xd7/0x180 [ 56.979308][ T693] ? __synchronize_srcu+0x21/0x2b0 [ 56.979443][ T693] __synchronize_srcu+0x9e/0x2b0 [ 56.979581][ T693] ? __pfx___synchronize_srcu+0x10/0x10 [ 56.979724][ T693] ? hlock_class+0x4e/0x130 [ 56.979865][ T693] ? mark_lock+0x38/0x3e0 [ 56.979970][ T693] ? kvm_clock_get_cycles+0x18/0x30 [ 56.980099][ T693] ? ktime_get_mono_fast_ns+0x84/0x360 [ 56.980242][ T693] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.980406][ T693] __rtnl_link_unregister+0x14a/0x380 [ 56.980534][ T693] ? mark_lock+0x38/0x3e0 [ 56.980635][ T693] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 56.980800][ T693] ? mark_held_locks+0x9e/0xe0 [ 56.980931][ T693] rtnl_link_unregister+0x14c/0x1c0 [ 56.981061][ T693] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 56.981191][ T693] ? __pfx_woken_wake_function+0x10/0x10 [ 56.981333][ T693] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.981566][ T693] __do_sys_delete_module+0x2bd/0x470 [ 56.981694][ T693] ? __pfx___do_sys_delete_module+0x10/0x10 [ 56.981863][ T693] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.982027][ T693] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.982276][ T693] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 56.982417][ T693] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.982585][ T693] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.982832][ T693] do_syscall_64+0xc1/0x1d0 [ 56.982967][ T693] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.983218][ T693] RIP: 0033:0x7f966e9d15ab [ 56.983356][ T693] 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 [ 56.983990][ T693] RSP: 002b:00007ffca0897ea8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 56.984262][ T693] RAX: ffffffffffffffda RBX: 000055aac33d9980 RCX: 00007f966e9d15ab [ 56.984553][ T693] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055aac33d99e8 [ 56.984748][ T693] RBP: 000055aac33d9980 R08: 0000000000000000 R09: 0000000000000000 [ 56.985029][ T693] R10: 00007f966eb30ac0 R11: 0000000000000206 R12: 000055aac33d99e8 [ 56.985307][ T693] R13: 0000000000000000 R14: 000055aac33d99e8 R15: 00007ffca089a1d8 [ 56.985601][ T693]