[ 6560.199443][T32762] netdevsim netdevsim738 eni738np1: renamed from eth1 [ 6560.283531][T32764] netdevsim netdevsim409 eni409np1: renamed from eth0 [ 6567.138872][ T353] [ 6567.138971][ T353] ====================================================== [ 6567.139140][ T353] WARNING: possible circular locking dependency detected [ 6567.139316][ T353] 6.12.0-rc5-virtme #1 Not tainted [ 6567.139458][ T353] ------------------------------------------------------ [ 6567.139631][ T353] modprobe/353 is trying to acquire lock: [ 6567.139769][ T353] ffffffffc082c7c0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 6567.140026][ T353] [ 6567.140026][ T353] but task is already holding lock: [ 6567.140229][ T353] ffffffffae7f7f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 6567.140482][ T353] [ 6567.140482][ T353] which lock already depends on the new lock. [ 6567.140482][ T353] [ 6567.140748][ T353] [ 6567.140748][ T353] the existing dependency chain (in reverse order) is: [ 6567.140981][ T353] [ 6567.140981][ T353] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 6567.141185][ T353] __lock_acquire+0xb3f/0x1580 [ 6567.141330][ T353] lock_acquire.part.0+0xeb/0x330 [ 6567.141467][ T353] __mutex_lock+0x149/0xac0 [ 6567.141606][ T353] rtnl_newlink+0x64f/0xa20 [ 6567.141745][ T353] rtnetlink_rcv_msg+0x712/0xc10 [ 6567.141879][ T353] netlink_rcv_skb+0x130/0x360 [ 6567.142015][ T353] netlink_unicast+0x44b/0x710 [ 6567.142155][ T353] netlink_sendmsg+0x723/0xbe0 [ 6567.142290][ T353] ____sys_sendmsg+0x7ac/0xa10 [ 6567.142423][ T353] ___sys_sendmsg+0xee/0x170 [ 6567.142562][ T353] __sys_sendmsg+0xcd/0x170 [ 6567.142698][ T353] do_syscall_64+0xc1/0x1d0 [ 6567.142838][ T353] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 6567.143010][ T353] [ 6567.143010][ T353] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 6567.143216][ T353] check_prev_add+0x182/0xce0 [ 6567.143357][ T353] validate_chain+0x71d/0x9b0 [ 6567.143493][ T353] __lock_acquire+0xb3f/0x1580 [ 6567.143631][ T353] lock_sync+0xd7/0x180 [ 6567.143768][ T353] __synchronize_srcu+0x9e/0x2b0 [ 6567.143903][ T353] __rtnl_link_unregister+0x14a/0x380 [ 6567.144075][ T353] rtnl_link_unregister+0x14c/0x1c0 [ 6567.144209][ T353] nsim_module_exit+0x10/0x1a [netdevsim] [ 6567.144393][ T353] __do_sys_delete_module+0x2bd/0x470 [ 6567.144569][ T353] do_syscall_64+0xc1/0x1d0 [ 6567.144704][ T353] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 6567.144875][ T353] [ 6567.144875][ T353] other info that might help us debug this: [ 6567.144875][ T353] [ 6567.145137][ T353] Possible unsafe locking scenario: [ 6567.145137][ T353] [ 6567.145340][ T353] CPU0 CPU1 [ 6567.145475][ T353] ---- ---- [ 6567.145620][ T353] lock(rtnl_mutex); [ 6567.145728][ T353] lock(&ops->srcu); [ 6567.145896][ T353] lock(rtnl_mutex); [ 6567.146069][ T353] sync(&ops->srcu); [ 6567.146175][ T353] [ 6567.146175][ T353] *** DEADLOCK *** [ 6567.146175][ T353] [ 6567.146372][ T353] 2 locks held by modprobe/353: [ 6567.146510][ T353] #0: ffffffffae7dcb10 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 6567.146787][ T353] #1: ffffffffae7f7f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 6567.147024][ T353] [ 6567.147024][ T353] stack backtrace: [ 6567.147193][ T353] CPU: 3 UID: 0 PID: 353 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 6567.147394][ T353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 6567.147697][ T353] Call Trace: [ 6567.147800][ T353] [ 6567.147874][ T353] dump_stack_lvl+0x82/0xd0 [ 6567.148016][ T353] print_circular_bug+0x2e2/0x4b0 [ 6567.148155][ T353] check_noncircular+0x2f9/0x3e0 [ 6567.148293][ T353] ? __pfx_check_noncircular+0x10/0x10 [ 6567.148429][ T353] ? __kernel_text_address+0x12/0x40 [ 6567.148569][ T353] ? unwind_get_return_address+0x5e/0xa0 [ 6567.148708][ T353] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 6567.148875][ T353] ? arch_stack_walk+0xa2/0xf0 [ 6567.149013][ T353] ? alloc_chain_hlocks+0x4e0/0x720 [ 6567.149147][ T353] check_prev_add+0x182/0xce0 [ 6567.149283][ T353] ? __pfx_stack_trace_save+0x10/0x10 [ 6567.149421][ T353] validate_chain+0x71d/0x9b0 [ 6567.149557][ T353] ? __pfx_validate_chain+0x10/0x10 [ 6567.149695][ T353] ? mark_lock+0x335/0x3e0 [ 6567.149832][ T353] ? __pfx_validate_chain+0x10/0x10 [ 6567.149968][ T353] __lock_acquire+0xb3f/0x1580 [ 6567.150107][ T353] lock_sync+0xd7/0x180 [ 6567.150213][ T353] ? __synchronize_srcu+0x21/0x2b0 [ 6567.150350][ T353] __synchronize_srcu+0x9e/0x2b0 [ 6567.150484][ T353] ? __pfx___synchronize_srcu+0x10/0x10 [ 6567.150619][ T353] ? hlock_class+0x4e/0x130 [ 6567.150756][ T353] ? mark_lock+0x38/0x3e0 [ 6567.150861][ T353] ? kvm_clock_get_cycles+0x18/0x30 [ 6567.151000][ T353] ? ktime_get_mono_fast_ns+0x84/0x360 [ 6567.151136][ T353] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 6567.151306][ T353] __rtnl_link_unregister+0x14a/0x380 [ 6567.151444][ T353] ? mark_lock+0x38/0x3e0 [ 6567.151547][ T353] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 6567.151714][ T353] ? mark_held_locks+0x9e/0xe0 [ 6567.151851][ T353] rtnl_link_unregister+0x14c/0x1c0 [ 6567.151991][ T353] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 6567.152126][ T353] ? __pfx_woken_wake_function+0x10/0x10 [ 6567.152267][ T353] nsim_module_exit+0x10/0x1a [netdevsim] [ 6567.152415][ T353] __do_sys_delete_module+0x2bd/0x470 [ 6567.152554][ T353] ? __pfx___do_sys_delete_module+0x10/0x10 [ 6567.152721][ T353] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 6567.152898][ T353] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 6567.153075][ T353] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 6567.153217][ T353] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 6567.153386][ T353] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 6567.153556][ T353] do_syscall_64+0xc1/0x1d0 [ 6567.153695][ T353] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 6567.153865][ T353] RIP: 0033:0x7f4f84ee85ab [ 6567.154006][ T353] 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 [ 6567.154490][ T353] RSP: 002b:00007ffc14b40b28 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 6567.154701][ T353] RAX: ffffffffffffffda RBX: 0000556388bf1ab0 RCX: 00007f4f84ee85ab [ 6567.154912][ T353] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000556388bf1b18 [ 6567.155115][ T353] RBP: 0000556388bf1ab0 R08: 0000000000000000 R09: 0000000000000000 [ 6567.155324][ T353] R10: 00007f4f85047ac0 R11: 0000000000000206 R12: 0000556388bf1b18 [ 6567.155531][ T353] R13: 0000000000000000 R14: 0000556388bf1b18 R15: 00007ffc14b42e58 [ 6567.155744][ T353]