[ 26.277573][ T258] netdevsim netdevsim5417 eni5417np1: renamed from eth2 [ 26.368364][ T266] netdevsim netdevsim1057 eni1057np1: renamed from eth1 [ 26.473761][ T262] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 56.285500][ T692] [ 56.285602][ T692] ====================================================== [ 56.285783][ T692] WARNING: possible circular locking dependency detected [ 56.285961][ T692] 6.12.0-rc5-virtme #1 Not tainted [ 56.286099][ T692] ------------------------------------------------------ [ 56.286264][ T692] modprobe/692 is trying to acquire lock: [ 56.286402][ T692] ffffffffc03a5420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 56.286665][ T692] [ 56.286665][ T692] but task is already holding lock: [ 56.286870][ T692] ffffffffa5bd3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.287123][ T692] [ 56.287123][ T692] which lock already depends on the new lock. [ 56.287123][ T692] [ 56.287393][ T692] [ 56.287393][ T692] the existing dependency chain (in reverse order) is: [ 56.287639][ T692] [ 56.287639][ T692] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 56.287847][ T692] __lock_acquire+0xb3f/0x1580 [ 56.287990][ T692] lock_acquire.part.0+0xeb/0x330 [ 56.288130][ T692] __mutex_lock+0x149/0xac0 [ 56.288277][ T692] rtnl_newlink+0x64b/0xa30 [ 56.288411][ T692] rtnetlink_rcv_msg+0x712/0xc10 [ 56.288559][ T692] netlink_rcv_skb+0x130/0x360 [ 56.288703][ T692] netlink_unicast+0x44b/0x710 [ 56.288846][ T692] netlink_sendmsg+0x723/0xbe0 [ 56.288989][ T692] ____sys_sendmsg+0x7ac/0xa10 [ 56.289132][ T692] ___sys_sendmsg+0xee/0x170 [ 56.289275][ T692] __sys_sendmsg+0xcd/0x170 [ 56.289416][ T692] do_syscall_64+0xc1/0x1d0 [ 56.289555][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.289729][ T692] [ 56.289729][ T692] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 56.289938][ T692] check_prev_add+0x182/0xce0 [ 56.290078][ T692] validate_chain+0x71d/0x9b0 [ 56.290217][ T692] __lock_acquire+0xb3f/0x1580 [ 56.290356][ T692] lock_sync+0xd7/0x180 [ 56.290493][ T692] __synchronize_srcu+0x9e/0x2b0 [ 56.290632][ T692] __rtnl_link_unregister+0x14a/0x380 [ 56.290809][ T692] rtnl_link_unregister+0x14c/0x1c0 [ 56.290947][ T692] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.291137][ T692] __do_sys_delete_module+0x2bd/0x470 [ 56.291308][ T692] do_syscall_64+0xc1/0x1d0 [ 56.291446][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.291622][ T692] [ 56.291622][ T692] other info that might help us debug this: [ 56.291622][ T692] [ 56.291898][ T692] Possible unsafe locking scenario: [ 56.291898][ T692] [ 56.292104][ T692] CPU0 CPU1 [ 56.292243][ T692] ---- ---- [ 56.292379][ T692] lock(rtnl_mutex); [ 56.292480][ T692] lock(&ops->srcu); [ 56.292658][ T692] lock(rtnl_mutex); [ 56.292830][ T692] sync(&ops->srcu); [ 56.292938][ T692] [ 56.292938][ T692] *** DEADLOCK *** [ 56.292938][ T692] [ 56.293143][ T692] 2 locks held by modprobe/692: [ 56.293282][ T692] #0: ffffffffa5bb8790 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 56.293558][ T692] #1: ffffffffa5bd3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 56.293806][ T692] [ 56.293806][ T692] stack backtrace: [ 56.293978][ T692] CPU: 0 UID: 0 PID: 692 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 56.294189][ T692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 56.294506][ T692] Call Trace: [ 56.294617][ T692] [ 56.294686][ T692] dump_stack_lvl+0x82/0xd0 [ 56.294835][ T692] print_circular_bug+0x2e2/0x4b0 [ 56.294971][ T692] check_noncircular+0x2f9/0x3e0 [ 56.295114][ T692] ? __pfx_check_noncircular+0x10/0x10 [ 56.295260][ T692] ? __kernel_text_address+0x12/0x40 [ 56.295406][ T692] ? unwind_get_return_address+0x5e/0xa0 [ 56.295547][ T692] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 56.295720][ T692] ? arch_stack_walk+0xa2/0xf0 [ 56.295862][ T692] ? alloc_chain_hlocks+0x4e0/0x720 [ 56.296006][ T692] check_prev_add+0x182/0xce0 [ 56.296147][ T692] ? __pfx_stack_trace_save+0x10/0x10 [ 56.296293][ T692] validate_chain+0x71d/0x9b0 [ 56.296437][ T692] ? __pfx_validate_chain+0x10/0x10 [ 56.296577][ T692] ? mark_lock+0x335/0x3e0 [ 56.296716][ T692] ? __pfx_validate_chain+0x10/0x10 [ 56.296855][ T692] __lock_acquire+0xb3f/0x1580 [ 56.296997][ T692] lock_sync+0xd7/0x180 [ 56.297105][ T692] ? __synchronize_srcu+0x21/0x2b0 [ 56.297243][ T692] __synchronize_srcu+0x9e/0x2b0 [ 56.297382][ T692] ? __pfx___synchronize_srcu+0x10/0x10 [ 56.297522][ T692] ? hlock_class+0x4e/0x130 [ 56.297665][ T692] ? mark_lock+0x38/0x3e0 [ 56.297772][ T692] ? kvm_clock_get_cycles+0x18/0x30 [ 56.297913][ T692] ? ktime_get_mono_fast_ns+0x84/0x360 [ 56.298060][ T692] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.298229][ T692] __rtnl_link_unregister+0x14a/0x380 [ 56.298371][ T692] ? mark_lock+0x38/0x3e0 [ 56.298481][ T692] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 56.298654][ T692] ? mark_held_locks+0x9e/0xe0 [ 56.298795][ T692] rtnl_link_unregister+0x14c/0x1c0 [ 56.298936][ T692] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 56.299073][ T692] ? __pfx_woken_wake_function+0x10/0x10 [ 56.299216][ T692] nsim_module_exit+0x10/0x1a [netdevsim] [ 56.299365][ T692] __do_sys_delete_module+0x2bd/0x470 [ 56.299506][ T692] ? __pfx___do_sys_delete_module+0x10/0x10 [ 56.299680][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.299859][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.300034][ T692] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 56.300184][ T692] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.300365][ T692] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.300538][ T692] do_syscall_64+0xc1/0x1d0 [ 56.300677][ T692] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.300843][ T692] RIP: 0033:0x7fcb50fdf5ab [ 56.300990][ T692] 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 [ 56.301561][ T692] RSP: 002b:00007ffcd9195bc8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 56.301845][ T692] RAX: ffffffffffffffda RBX: 0000557cce9d5980 RCX: 00007fcb50fdf5ab [ 56.302053][ T692] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000557cce9d59e8 [ 56.302272][ T692] RBP: 0000557cce9d5980 R08: 0000000000000000 R09: 0000000000000000 [ 56.302560][ T692] R10: 00007fcb5113eac0 R11: 0000000000000206 R12: 0000557cce9d59e8 [ 56.302776][ T692] R13: 0000000000000000 R14: 0000557cce9d59e8 R15: 00007ffcd9197ef8 [ 56.303056][ T692]