[ 25.647731][ T258] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 58.175748][ T607] Failed to register fib notifier [ 114.511024][ T1196] Failed to register fib notifier [ 149.580362][ T1564] Failed to register fib notifier [ 207.584929][ T2153] Failed to register fib notifier [ 209.621623][ T2184] [ 209.621718][ T2184] ====================================================== [ 209.621875][ T2184] WARNING: possible circular locking dependency detected [ 209.622028][ T2184] 6.12.0-rc5-virtme #1 Not tainted [ 209.622153][ T2184] ------------------------------------------------------ [ 209.622309][ T2184] modprobe/2184 is trying to acquire lock: [ 209.622463][ T2184] ffffffffc05fd420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 209.622690][ T2184] [ 209.622690][ T2184] but task is already holding lock: [ 209.622888][ T2184] ffffffffb87d3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 209.623125][ T2184] [ 209.623125][ T2184] which lock already depends on the new lock. [ 209.623125][ T2184] [ 209.623373][ T2184] [ 209.623373][ T2184] the existing dependency chain (in reverse order) is: [ 209.623584][ T2184] [ 209.623584][ T2184] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 209.623774][ T2184] __lock_acquire+0xb3f/0x1580 [ 209.623903][ T2184] lock_acquire.part.0+0xeb/0x330 [ 209.624030][ T2184] __mutex_lock+0x149/0xac0 [ 209.624157][ T2184] rtnl_newlink+0x64b/0xa30 [ 209.624284][ T2184] rtnetlink_rcv_msg+0x712/0xc10 [ 209.624413][ T2184] netlink_rcv_skb+0x130/0x360 [ 209.624543][ T2184] netlink_unicast+0x44b/0x710 [ 209.624672][ T2184] netlink_sendmsg+0x723/0xbe0 [ 209.624800][ T2184] ____sys_sendmsg+0x7ac/0xa10 [ 209.624929][ T2184] ___sys_sendmsg+0xee/0x170 [ 209.625064][ T2184] __sys_sendmsg+0xcd/0x170 [ 209.625191][ T2184] do_syscall_64+0xc1/0x1d0 [ 209.625326][ T2184] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 209.625485][ T2184] [ 209.625485][ T2184] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 209.625675][ T2184] check_prev_add+0x182/0xce0 [ 209.625799][ T2184] validate_chain+0x71d/0x9b0 [ 209.625925][ T2184] __lock_acquire+0xb3f/0x1580 [ 209.626049][ T2184] lock_sync+0xd7/0x180 [ 209.626179][ T2184] __synchronize_srcu+0x9e/0x2b0 [ 209.626303][ T2184] __rtnl_link_unregister+0x14a/0x380 [ 209.626460][ T2184] rtnl_link_unregister+0x14c/0x1c0 [ 209.626584][ T2184] nsim_module_exit+0x10/0x1a [netdevsim] [ 209.626758][ T2184] __do_sys_delete_module+0x2bd/0x470 [ 209.626913][ T2184] do_syscall_64+0xc1/0x1d0 [ 209.627039][ T2184] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 209.627196][ T2184] [ 209.627196][ T2184] other info that might help us debug this: [ 209.627196][ T2184] [ 209.627435][ T2184] Possible unsafe locking scenario: [ 209.627435][ T2184] [ 209.627617][ T2184] CPU0 CPU1 [ 209.627739][ T2184] ---- ---- [ 209.627860][ T2184] lock(rtnl_mutex); [ 209.627965][ T2184] lock(&ops->srcu); [ 209.628122][ T2184] lock(rtnl_mutex); [ 209.628277][ T2184] sync(&ops->srcu); [ 209.628372][ T2184] [ 209.628372][ T2184] *** DEADLOCK *** [ 209.628372][ T2184] [ 209.628552][ T2184] 2 locks held by modprobe/2184: [ 209.628675][ T2184] #0: ffffffffb87b8790 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 209.628929][ T2184] #1: ffffffffb87d3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 209.629226][ T2184] [ 209.629226][ T2184] stack backtrace: [ 209.629379][ T2184] CPU: 2 UID: 0 PID: 2184 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 209.629564][ T2184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 209.629904][ T2184] Call Trace: [ 209.630008][ T2184] [ 209.630074][ T2184] dump_stack_lvl+0x82/0xd0 [ 209.630208][ T2184] print_circular_bug+0x2e2/0x4b0 [ 209.630404][ T2184] check_noncircular+0x2f9/0x3e0 [ 209.630530][ T2184] ? __pfx_check_noncircular+0x10/0x10 [ 209.630656][ T2184] ? __kernel_text_address+0x12/0x40 [ 209.630781][ T2184] ? unwind_get_return_address+0x5e/0xa0 [ 209.630906][ T2184] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 209.631132][ T2184] ? arch_stack_walk+0xa2/0xf0 [ 209.631259][ T2184] ? alloc_chain_hlocks+0x4e0/0x720 [ 209.631386][ T2184] check_prev_add+0x182/0xce0 [ 209.631511][ T2184] ? __pfx_stack_trace_save+0x10/0x10 [ 209.631647][ T2184] validate_chain+0x71d/0x9b0 [ 209.631775][ T2184] ? __pfx_validate_chain+0x10/0x10 [ 209.631899][ T2184] ? mark_lock+0x335/0x3e0 [ 209.632023][ T2184] ? __pfx_validate_chain+0x10/0x10 [ 209.632148][ T2184] __lock_acquire+0xb3f/0x1580 [ 209.632275][ T2184] lock_sync+0xd7/0x180 [ 209.632371][ T2184] ? __synchronize_srcu+0x21/0x2b0 [ 209.632496][ T2184] __synchronize_srcu+0x9e/0x2b0 [ 209.632688][ T2184] ? __pfx___synchronize_srcu+0x10/0x10 [ 209.632811][ T2184] ? hlock_class+0x4e/0x130 [ 209.632934][ T2184] ? mark_lock+0x38/0x3e0 [ 209.633029][ T2184] ? kvm_clock_get_cycles+0x18/0x30 [ 209.633154][ T2184] ? ktime_get_mono_fast_ns+0x84/0x360 [ 209.633417][ T2184] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 209.633574][ T2184] __rtnl_link_unregister+0x14a/0x380 [ 209.633698][ T2184] ? mark_lock+0x38/0x3e0 [ 209.633792][ T2184] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 209.634015][ T2184] ? mark_held_locks+0x9e/0xe0 [ 209.634140][ T2184] rtnl_link_unregister+0x14c/0x1c0 [ 209.634263][ T2184] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 209.634387][ T2184] ? __pfx_woken_wake_function+0x10/0x10 [ 209.634584][ T2184] nsim_module_exit+0x10/0x1a [netdevsim] [ 209.634719][ T2184] __do_sys_delete_module+0x2bd/0x470 [ 209.634843][ T2184] ? __pfx___do_sys_delete_module+0x10/0x10 [ 209.634995][ T2184] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 209.635218][ T2184] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 209.635372][ T2184] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 209.635498][ T2184] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 209.635652][ T2184] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 209.635876][ T2184] do_syscall_64+0xc1/0x1d0 [ 209.635999][ T2184] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 209.636153][ T2184] RIP: 0033:0x7fefc1f105ab [ 209.636355][ T2184] 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 [ 209.636797][ T2184] RSP: 002b:00007fff6f62a578 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 209.637055][ T2184] RAX: ffffffffffffffda RBX: 000055ff71367980 RCX: 00007fefc1f105ab [ 209.637244][ T2184] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055ff713679e8 [ 209.637432][ T2184] RBP: 000055ff71367980 R08: 0000000000000000 R09: 0000000000000000 [ 209.637688][ T2184] R10: 00007fefc206fac0 R11: 0000000000000206 R12: 000055ff713679e8 [ 209.637875][ T2184] R13: 0000000000000000 R14: 000055ff713679e8 R15: 00007fff6f62c8a8 [ 209.638064][ T2184]