[ 39.210583][ T257] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 353.969438][ T1151] netdevsim: Exceeded number of supported nexthops [ 358.095576][ T1197] netdevsim: Failed to replace nexthop bucket [ 358.096031][ T1197] netdevsim: Failed to replace nexthop bucket [ 362.427369][ T1252] Failed to register nexthop notifier [ 363.828344][ T1267] [ 363.828579][ T1267] ====================================================== [ 363.828855][ T1267] WARNING: possible circular locking dependency detected [ 363.829157][ T1267] 6.12.0-rc5-virtme #1 Not tainted [ 363.829362][ T1267] ------------------------------------------------------ [ 363.829636][ T1267] modprobe/1267 is trying to acquire lock: [ 363.829900][ T1267] ffffffffc02a44e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 363.830282][ T1267] [ 363.830282][ T1267] but task is already holding lock: [ 363.830559][ T1267] ffffffffa2dd3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 363.830930][ T1267] [ 363.830930][ T1267] which lock already depends on the new lock. [ 363.830930][ T1267] [ 363.831335][ T1267] [ 363.831335][ T1267] the existing dependency chain (in reverse order) is: [ 363.831686][ T1267] [ 363.831686][ T1267] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 363.832002][ T1267] __lock_acquire+0xb3f/0x1580 [ 363.832228][ T1267] lock_acquire.part.0+0xeb/0x330 [ 363.832429][ T1267] __mutex_lock+0x149/0xac0 [ 363.832624][ T1267] rtnl_newlink+0x64f/0xa20 [ 363.832820][ T1267] rtnetlink_rcv_msg+0x712/0xc10 [ 363.833019][ T1267] netlink_rcv_skb+0x130/0x360 [ 363.833247][ T1267] netlink_unicast+0x44b/0x710 [ 363.833468][ T1267] netlink_sendmsg+0x723/0xbe0 [ 363.833681][ T1267] ____sys_sendmsg+0x7ac/0xa10 [ 363.833875][ T1267] ___sys_sendmsg+0xee/0x170 [ 363.834075][ T1267] __sys_sendmsg+0xcd/0x170 [ 363.834292][ T1267] do_syscall_64+0xc1/0x1d0 [ 363.834517][ T1267] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 363.834778][ T1267] [ 363.834778][ T1267] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 363.835089][ T1267] check_prev_add+0x182/0xce0 [ 363.835302][ T1267] validate_chain+0x71d/0x9b0 [ 363.835528][ T1267] __lock_acquire+0xb3f/0x1580 [ 363.835722][ T1267] lock_sync+0xd7/0x180 [ 363.835917][ T1267] __synchronize_srcu+0x9e/0x2b0 [ 363.836110][ T1267] __rtnl_link_unregister+0x14a/0x380 [ 363.836373][ T1267] rtnl_link_unregister+0x14c/0x1c0 [ 363.836577][ T1267] nsim_module_exit+0x10/0x1a [netdevsim] [ 363.836841][ T1267] __do_sys_delete_module+0x2bd/0x470 [ 363.837104][ T1267] do_syscall_64+0xc1/0x1d0 [ 363.837305][ T1267] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 363.837575][ T1267] [ 363.837575][ T1267] other info that might help us debug this: [ 363.837575][ T1267] [ 363.837978][ T1267] Possible unsafe locking scenario: [ 363.837978][ T1267] [ 363.838346][ T1267] CPU0 CPU1 [ 363.838594][ T1267] ---- ---- [ 363.838808][ T1267] lock(rtnl_mutex); [ 363.838974][ T1267] lock(&ops->srcu); [ 363.839233][ T1267] lock(rtnl_mutex); [ 363.839502][ T1267] sync(&ops->srcu); [ 363.839676][ T1267] [ 363.839676][ T1267] *** DEADLOCK *** [ 363.839676][ T1267] [ 363.840011][ T1267] 2 locks held by modprobe/1267: [ 363.840233][ T1267] #0: ffffffffa2db8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 363.840658][ T1267] #1: ffffffffa2dd3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 363.841057][ T1267] [ 363.841057][ T1267] stack backtrace: [ 363.841315][ T1267] CPU: 3 UID: 0 PID: 1267 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 363.841654][ T1267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 363.842118][ T1267] Call Trace: [ 363.842301][ T1267] [ 363.842421][ T1267] dump_stack_lvl+0x82/0xd0 [ 363.842638][ T1267] print_circular_bug+0x2e2/0x4b0 [ 363.842855][ T1267] check_noncircular+0x2f9/0x3e0 [ 363.843064][ T1267] ? __pfx_check_noncircular+0x10/0x10 [ 363.843284][ T1267] ? __kernel_text_address+0x12/0x40 [ 363.843512][ T1267] ? unwind_get_return_address+0x5e/0xa0 [ 363.843769][ T1267] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 363.844028][ T1267] ? arch_stack_walk+0xa2/0xf0 [ 363.844284][ T1267] ? alloc_chain_hlocks+0x4e0/0x720 [ 363.844497][ T1267] check_prev_add+0x182/0xce0 [ 363.844725][ T1267] ? __pfx_stack_trace_save+0x10/0x10 [ 363.844935][ T1267] validate_chain+0x71d/0x9b0 [ 363.845182][ T1267] ? __pfx_validate_chain+0x10/0x10 [ 363.845404][ T1267] ? mark_lock+0x335/0x3e0 [ 363.845629][ T1267] ? __pfx_validate_chain+0x10/0x10 [ 363.845855][ T1267] __lock_acquire+0xb3f/0x1580 [ 363.846085][ T1267] lock_sync+0xd7/0x180 [ 363.846270][ T1267] ? __synchronize_srcu+0x21/0x2b0 [ 363.846501][ T1267] __synchronize_srcu+0x9e/0x2b0 [ 363.846726][ T1267] ? __pfx___synchronize_srcu+0x10/0x10 [ 363.846951][ T1267] ? hlock_class+0x4e/0x130 [ 363.847187][ T1267] ? mark_lock+0x38/0x3e0 [ 363.847363][ T1267] ? kvm_clock_get_cycles+0x18/0x30 [ 363.847626][ T1267] ? ktime_get_mono_fast_ns+0x84/0x360 [ 363.847860][ T1267] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 363.848160][ T1267] __rtnl_link_unregister+0x14a/0x380 [ 363.848366][ T1267] ? mark_lock+0x38/0x3e0 [ 363.848532][ T1267] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 363.848809][ T1267] ? mark_held_locks+0x9e/0xe0 [ 363.849028][ T1267] rtnl_link_unregister+0x14c/0x1c0 [ 363.849245][ T1267] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 363.849452][ T1267] ? __pfx_woken_wake_function+0x10/0x10 [ 363.849671][ T1267] nsim_module_exit+0x10/0x1a [netdevsim] [ 363.849931][ T1267] __do_sys_delete_module+0x2bd/0x470 [ 363.850137][ T1267] ? __pfx___do_sys_delete_module+0x10/0x10 [ 363.850434][ T1267] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 363.850701][ T1267] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 363.850959][ T1267] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 363.851179][ T1267] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 363.851454][ T1267] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 363.851727][ T1267] do_syscall_64+0xc1/0x1d0 [ 363.851945][ T1267] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 363.852209][ T1267] RIP: 0033:0x7feff9f7c5ab [ 363.852445][ T1267] 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 [ 363.853181][ T1267] RSP: 002b:00007ffc625d65a8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 363.853501][ T1267] RAX: ffffffffffffffda RBX: 000055e7bf55b980 RCX: 00007feff9f7c5ab [ 363.853811][ T1267] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055e7bf55b9e8 [ 363.854132][ T1267] RBP: 000055e7bf55b980 R08: 0000000000000000 R09: 0000000000000000 [ 363.854447][ T1267] R10: 00007feffa0dbac0 R11: 0000000000000206 R12: 000055e7bf55b9e8 [ 363.854769][ T1267] R13: 0000000000000000 R14: 000055e7bf55b9e8 R15: 00007ffc625d88d8 [ 363.855233][ T1267]