[ 26.662447][ T254] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 26.688441][ T267] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 26.750513][ T256] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 56.918454][ T691] [ 56.918587][ T691] ====================================================== [ 56.918750][ T691] WARNING: possible circular locking dependency detected [ 56.918913][ T691] 6.12.0-rc5-virtme #1 Not tainted [ 56.919048][ T691] ------------------------------------------------------ [ 56.919209][ T691] modprobe/691 is trying to acquire lock: [ 56.919341][ T691] ffffffffc0276420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 56.919593][ T691] [ 56.919593][ T691] but task is already holding lock: [ 56.919786][ T691] ffffffffa37d3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.920019][ T691] [ 56.920019][ T691] which lock already depends on the new lock. [ 56.920019][ T691] [ 56.920271][ T691] [ 56.920271][ T691] the existing dependency chain (in reverse order) is: [ 56.920500][ T691] [ 56.920500][ T691] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 56.920699][ T691] __lock_acquire+0xb3f/0x1580 [ 56.920832][ T691] lock_acquire.part.0+0xeb/0x330 [ 56.920967][ T691] __mutex_lock+0x149/0xac0 [ 56.921114][ T691] rtnl_newlink+0x64b/0xa30 [ 56.921243][ T691] rtnetlink_rcv_msg+0x712/0xc10 [ 56.921373][ T691] netlink_rcv_skb+0x130/0x360 [ 56.921511][ T691] netlink_unicast+0x44b/0x710 [ 56.921647][ T691] netlink_sendmsg+0x723/0xbe0 [ 56.921776][ T691] ____sys_sendmsg+0x7ac/0xa10 [ 56.921907][ T691] ___sys_sendmsg+0xee/0x170 [ 56.922037][ T691] __sys_sendmsg+0xcd/0x170 [ 56.922170][ T691] do_syscall_64+0xc1/0x1d0 [ 56.922300][ T691] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.922470][ T691] [ 56.922470][ T691] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 56.922696][ T691] check_prev_add+0x182/0xce0 [ 56.922827][ T691] validate_chain+0x71d/0x9b0 [ 56.922956][ T691] __lock_acquire+0xb3f/0x1580 [ 56.923086][ T691] lock_sync+0xd7/0x180 [ 56.923220][ T691] __synchronize_srcu+0x9e/0x2b0 [ 56.923349][ T691] __rtnl_link_unregister+0x14a/0x380 [ 56.923522][ T691] rtnl_link_unregister+0x14c/0x1c0 [ 56.923654][ T691] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.923839][ T691] __do_sys_delete_module+0x2bd/0x470 [ 56.924001][ T691] do_syscall_64+0xc1/0x1d0 [ 56.924133][ T691] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.924297][ T691] [ 56.924297][ T691] other info that might help us debug this: [ 56.924297][ T691] [ 56.924556][ T691] Possible unsafe locking scenario: [ 56.924556][ T691] [ 56.924748][ T691] CPU0 CPU1 [ 56.924880][ T691] ---- ---- [ 56.925008][ T691] lock(rtnl_mutex); [ 56.925108][ T691] lock(&ops->srcu); [ 56.925279][ T691] lock(rtnl_mutex); [ 56.925438][ T691] sync(&ops->srcu); [ 56.925547][ T691] [ 56.925547][ T691] *** DEADLOCK *** [ 56.925547][ T691] [ 56.925734][ T691] 2 locks held by modprobe/691: [ 56.925865][ T691] #0: ffffffffa37b8650 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 56.926131][ T691] #1: ffffffffa37d3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.926364][ T691] [ 56.926364][ T691] stack backtrace: [ 56.926561][ T691] CPU: 2 UID: 0 PID: 691 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 56.926756][ T691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 56.927046][ T691] Call Trace: [ 56.927147][ T691] [ 56.927216][ T691] dump_stack_lvl+0x82/0xd0 [ 56.927353][ T691] print_circular_bug+0x2e2/0x4b0 [ 56.927494][ T691] check_noncircular+0x2f9/0x3e0 [ 56.927629][ T691] ? __pfx_check_noncircular+0x10/0x10 [ 56.927761][ T691] ? __kernel_text_address+0x12/0x40 [ 56.927892][ T691] ? unwind_get_return_address+0x5e/0xa0 [ 56.928023][ T691] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 56.928187][ T691] ? arch_stack_walk+0xa2/0xf0 [ 56.928319][ T691] ? alloc_chain_hlocks+0x4e0/0x720 [ 56.928455][ T691] check_prev_add+0x182/0xce0 [ 56.928585][ T691] ? __pfx_stack_trace_save+0x10/0x10 [ 56.928716][ T691] validate_chain+0x71d/0x9b0 [ 56.928848][ T691] ? __pfx_validate_chain+0x10/0x10 [ 56.928977][ T691] ? mark_lock+0x335/0x3e0 [ 56.929107][ T691] ? __pfx_validate_chain+0x10/0x10 [ 56.929238][ T691] __lock_acquire+0xb3f/0x1580 [ 56.929370][ T691] lock_sync+0xd7/0x180 [ 56.929472][ T691] ? __synchronize_srcu+0x21/0x2b0 [ 56.929603][ T691] __synchronize_srcu+0x9e/0x2b0 [ 56.929732][ T691] ? __pfx___synchronize_srcu+0x10/0x10 [ 56.929862][ T691] ? hlock_class+0x4e/0x130 [ 56.929994][ T691] ? mark_lock+0x38/0x3e0 [ 56.930092][ T691] ? kvm_clock_get_cycles+0x18/0x30 [ 56.930224][ T691] ? ktime_get_mono_fast_ns+0x84/0x360 [ 56.930357][ T691] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.930524][ T691] __rtnl_link_unregister+0x14a/0x380 [ 56.930655][ T691] ? mark_lock+0x38/0x3e0 [ 56.930754][ T691] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 56.930918][ T691] ? mark_held_locks+0x9e/0xe0 [ 56.931049][ T691] rtnl_link_unregister+0x14c/0x1c0 [ 56.931179][ T691] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 56.931309][ T691] ? __pfx_woken_wake_function+0x10/0x10 [ 56.931447][ T691] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.931609][ T691] __do_sys_delete_module+0x2bd/0x470 [ 56.931742][ T691] ? __pfx___do_sys_delete_module+0x10/0x10 [ 56.931903][ T691] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.932067][ T691] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.932228][ T691] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 56.932361][ T691] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.932526][ T691] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.932693][ T691] do_syscall_64+0xc1/0x1d0 [ 56.932823][ T691] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.932988][ T691] RIP: 0033:0x7fbd383de5ab [ 56.933124][ T691] 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 [ 56.933584][ T691] RSP: 002b:00007ffd49555d38 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 56.933783][ T691] RAX: ffffffffffffffda RBX: 000055ca219ad980 RCX: 00007fbd383de5ab [ 56.933982][ T691] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055ca219ad9e8 [ 56.934178][ T691] RBP: 000055ca219ad980 R08: 0000000000000000 R09: 0000000000000000 [ 56.934372][ T691] R10: 00007fbd3853dac0 R11: 0000000000000206 R12: 000055ca219ad9e8 [ 56.934573][ T691] R13: 0000000000000000 R14: 000055ca219ad9e8 R15: 00007ffd49558068 [ 56.934769][ T691]