[ 28.237346][ T261] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 28.371631][ T254] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 28.442483][ T256] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 59.163453][ T688] [ 59.163578][ T688] ====================================================== [ 59.163778][ T688] WARNING: possible circular locking dependency detected [ 59.163970][ T688] 6.12.0-rc5-virtme #1 Not tainted [ 59.164126][ T688] ------------------------------------------------------ [ 59.164317][ T688] modprobe/688 is trying to acquire lock: [ 59.164474][ T688] ffffffffc02f74e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 59.164762][ T688] [ 59.164762][ T688] but task is already holding lock: [ 59.164996][ T688] ffffffffa71d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 59.165297][ T688] [ 59.165297][ T688] which lock already depends on the new lock. [ 59.165297][ T688] [ 59.165602][ T688] [ 59.165602][ T688] the existing dependency chain (in reverse order) is: [ 59.165864][ T688] [ 59.165864][ T688] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 59.166099][ T688] __lock_acquire+0xb3f/0x1580 [ 59.166262][ T688] lock_acquire.part.0+0xeb/0x330 [ 59.166421][ T688] __mutex_lock+0x149/0xac0 [ 59.166575][ T688] rtnl_newlink+0x64f/0xa20 [ 59.166733][ T688] rtnetlink_rcv_msg+0x712/0xc10 [ 59.166886][ T688] netlink_rcv_skb+0x130/0x360 [ 59.167041][ T688] netlink_unicast+0x44b/0x710 [ 59.167195][ T688] netlink_sendmsg+0x723/0xbe0 [ 59.167351][ T688] ____sys_sendmsg+0x7ac/0xa10 [ 59.167507][ T688] ___sys_sendmsg+0xee/0x170 [ 59.167662][ T688] __sys_sendmsg+0xcd/0x170 [ 59.167815][ T688] do_syscall_64+0xc1/0x1d0 [ 59.167972][ T688] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 59.168168][ T688] [ 59.168168][ T688] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 59.168402][ T688] check_prev_add+0x182/0xce0 [ 59.168560][ T688] validate_chain+0x71d/0x9b0 [ 59.168714][ T688] __lock_acquire+0xb3f/0x1580 [ 59.168867][ T688] lock_sync+0xd7/0x180 [ 59.169023][ T688] __synchronize_srcu+0x9e/0x2b0 [ 59.169182][ T688] __rtnl_link_unregister+0x14a/0x380 [ 59.169372][ T688] rtnl_link_unregister+0x14c/0x1c0 [ 59.169549][ T688] nsim_module_exit+0x10/0x1a [netdevsim] [ 59.169766][ T688] __do_sys_delete_module+0x2bd/0x470 [ 59.169955][ T688] do_syscall_64+0xc1/0x1d0 [ 59.170105][ T688] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 59.170299][ T688] [ 59.170299][ T688] other info that might help us debug this: [ 59.170299][ T688] [ 59.170598][ T688] Possible unsafe locking scenario: [ 59.170598][ T688] [ 59.170823][ T688] CPU0 CPU1 [ 59.170999][ T688] ---- ---- [ 59.171151][ T688] lock(rtnl_mutex); [ 59.171277][ T688] lock(&ops->srcu); [ 59.171467][ T688] lock(rtnl_mutex); [ 59.171684][ T688] sync(&ops->srcu); [ 59.171802][ T688] [ 59.171802][ T688] *** DEADLOCK *** [ 59.171802][ T688] [ 59.172038][ T688] 2 locks held by modprobe/688: [ 59.172195][ T688] #0: ffffffffa71b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 59.172512][ T688] #1: ffffffffa71d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 59.172799][ T688] [ 59.172799][ T688] stack backtrace: [ 59.173018][ T688] CPU: 3 UID: 0 PID: 688 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 59.173250][ T688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 59.173605][ T688] Call Trace: [ 59.173741][ T688] [ 59.173820][ T688] dump_stack_lvl+0x82/0xd0 [ 59.173999][ T688] print_circular_bug+0x2e2/0x4b0 [ 59.174164][ T688] check_noncircular+0x2f9/0x3e0 [ 59.174337][ T688] ? __pfx_check_noncircular+0x10/0x10 [ 59.174491][ T688] ? __kernel_text_address+0x12/0x40 [ 59.174652][ T688] ? unwind_get_return_address+0x5e/0xa0 [ 59.174817][ T688] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 59.175012][ T688] ? arch_stack_walk+0xa2/0xf0 [ 59.175183][ T688] ? alloc_chain_hlocks+0x4e0/0x720 [ 59.175363][ T688] check_prev_add+0x182/0xce0 [ 59.175520][ T688] ? __pfx_stack_trace_save+0x10/0x10 [ 59.175674][ T688] validate_chain+0x71d/0x9b0 [ 59.175839][ T688] ? __pfx_validate_chain+0x10/0x10 [ 59.175996][ T688] ? mark_lock+0x335/0x3e0 [ 59.176149][ T688] ? __pfx_validate_chain+0x10/0x10 [ 59.176315][ T688] __lock_acquire+0xb3f/0x1580 [ 59.176462][ T688] lock_sync+0xd7/0x180 [ 59.176597][ T688] ? __synchronize_srcu+0x21/0x2b0 [ 59.176771][ T688] ? mark_held_locks+0x9e/0xe0 [ 59.176934][ T688] __synchronize_srcu+0x9e/0x2b0 [ 59.177089][ T688] ? __pfx___synchronize_srcu+0x10/0x10 [ 59.177258][ T688] ? kvm_clock_get_cycles+0x18/0x30 [ 59.177429][ T688] ? ktime_get_mono_fast_ns+0x84/0x360 [ 59.177587][ T688] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 59.177801][ T688] ? _raw_spin_unlock_irqrestore+0x43/0x70 [ 59.178014][ T688] __rtnl_link_unregister+0x14a/0x380 [ 59.178186][ T688] ? mark_lock+0x38/0x3e0 [ 59.178310][ T688] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 59.178525][ T688] ? mark_held_locks+0x9e/0xe0 [ 59.178684][ T688] rtnl_link_unregister+0x14c/0x1c0 [ 59.178844][ T688] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 59.179020][ T688] ? __pfx_woken_wake_function+0x10/0x10 [ 59.179178][ T688] nsim_module_exit+0x10/0x1a [netdevsim] [ 59.179353][ T688] __do_sys_delete_module+0x2bd/0x470 [ 59.179524][ T688] ? __pfx___do_sys_delete_module+0x10/0x10 [ 59.179724][ T688] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 59.179915][ T688] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 59.180119][ T688] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 59.180292][ T688] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 59.180661][ T688] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 59.180863][ T688] do_syscall_64+0xc1/0x1d0 [ 59.181034][ T688] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 59.181226][ T688] RIP: 0033:0x7fa320cdc5ab [ 59.181397][ T688] 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 [ 59.182047][ T688] RSP: 002b:00007fff112bf0f8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 59.182277][ T688] RAX: ffffffffffffffda RBX: 00005581bfc94980 RCX: 00007fa320cdc5ab [ 59.182519][ T688] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005581bfc949e8 [ 59.182765][ T688] RBP: 00005581bfc94980 R08: 0000000000000000 R09: 0000000000000000 [ 59.183089][ T688] R10: 00007fa320e3bac0 R11: 0000000000000206 R12: 00005581bfc949e8 [ 59.183355][ T688] R13: 0000000000000000 R14: 00005581bfc949e8 R15: 00007fff112c1428 [ 59.183670][ T688]