[ 2263.692085][T15367] netdevsim netdevsim563 eni563np1: renamed from eth1 [ 2263.766199][T15365] netdevsim netdevsim258 eni258np1: renamed from eth0 [ 2271.314361][T15425] [ 2271.314458][T15425] ====================================================== [ 2271.314636][T15425] WARNING: possible circular locking dependency detected [ 2271.314802][T15425] 6.12.0-rc5-virtme #1 Not tainted [ 2271.314930][T15425] ------------------------------------------------------ [ 2271.315085][T15425] modprobe/15425 is trying to acquire lock: [ 2271.315247][T15425] ffffffffc05a9700 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 2271.315490][T15425] [ 2271.315490][T15425] but task is already holding lock: [ 2271.315677][T15425] ffffffff9a5f7e88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 2271.315915][T15425] [ 2271.315915][T15425] which lock already depends on the new lock. [ 2271.315915][T15425] [ 2271.316172][T15425] [ 2271.316172][T15425] the existing dependency chain (in reverse order) is: [ 2271.316402][T15425] [ 2271.316402][T15425] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 2271.316602][T15425] __lock_acquire+0xb3f/0x1580 [ 2271.316734][T15425] lock_acquire.part.0+0xeb/0x330 [ 2271.316863][T15425] __mutex_lock+0x149/0xac0 [ 2271.316999][T15425] rtnl_newlink+0x64b/0xa30 [ 2271.317128][T15425] rtnetlink_rcv_msg+0x712/0xc10 [ 2271.317259][T15425] netlink_rcv_skb+0x130/0x360 [ 2271.317394][T15425] netlink_unicast+0x44b/0x710 [ 2271.317523][T15425] netlink_sendmsg+0x723/0xbe0 [ 2271.317651][T15425] ____sys_sendmsg+0x7ac/0xa10 [ 2271.317779][T15425] ___sys_sendmsg+0xee/0x170 [ 2271.317921][T15425] __sys_sendmsg+0xcd/0x170 [ 2271.318053][T15425] do_syscall_64+0xc1/0x1d0 [ 2271.318188][T15425] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 2271.318350][T15425] [ 2271.318350][T15425] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 2271.318545][T15425] check_prev_add+0x182/0xce0 [ 2271.318677][T15425] validate_chain+0x71d/0x9b0 [ 2271.318802][T15425] __lock_acquire+0xb3f/0x1580 [ 2271.318930][T15425] lock_sync+0xd7/0x180 [ 2271.319059][T15425] __synchronize_srcu+0x9e/0x2b0 [ 2271.319189][T15425] __rtnl_link_unregister+0x14a/0x380 [ 2271.319350][T15425] rtnl_link_unregister+0x14c/0x1c0 [ 2271.319476][T15425] nsim_module_exit+0x10/0x1a [netdevsim] [ 2271.319652][T15425] __do_sys_delete_module+0x2bd/0x470 [ 2271.319809][T15425] do_syscall_64+0xc1/0x1d0 [ 2271.319936][T15425] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 2271.320094][T15425] [ 2271.320094][T15425] other info that might help us debug this: [ 2271.320094][T15425] [ 2271.320340][T15425] Possible unsafe locking scenario: [ 2271.320340][T15425] [ 2271.320526][T15425] CPU0 CPU1 [ 2271.320671][T15425] ---- ---- [ 2271.320797][T15425] lock(rtnl_mutex); [ 2271.320893][T15425] lock(&ops->srcu); [ 2271.321048][T15425] lock(rtnl_mutex); [ 2271.321206][T15425] sync(&ops->srcu); [ 2271.321307][T15425] [ 2271.321307][T15425] *** DEADLOCK *** [ 2271.321307][T15425] [ 2271.321494][T15425] 2 locks held by modprobe/15425: [ 2271.321620][T15425] #0: ffffffff9a5dca10 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 2271.321878][T15425] #1: ffffffff9a5f7e88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 2271.322099][T15425] [ 2271.322099][T15425] stack backtrace: [ 2271.322261][T15425] CPU: 1 UID: 0 PID: 15425 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 2271.322488][T15425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 2271.322766][T15425] Call Trace: [ 2271.322865][T15425] [ 2271.322935][T15425] dump_stack_lvl+0x82/0xd0 [ 2271.323067][T15425] print_circular_bug+0x2e2/0x4b0 [ 2271.323199][T15425] check_noncircular+0x2f9/0x3e0 [ 2271.323365][T15425] ? __pfx_check_noncircular+0x10/0x10 [ 2271.323493][T15425] ? __kernel_text_address+0x12/0x40 [ 2271.323628][T15425] ? unwind_get_return_address+0x5e/0xa0 [ 2271.323758][T15425] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 2271.323916][T15425] ? arch_stack_walk+0xa2/0xf0 [ 2271.324044][T15425] ? alloc_chain_hlocks+0x4e0/0x720 [ 2271.324172][T15425] check_prev_add+0x182/0xce0 [ 2271.324297][T15425] ? __pfx_stack_trace_save+0x10/0x10 [ 2271.324424][T15425] validate_chain+0x71d/0x9b0 [ 2271.324553][T15425] ? __pfx_validate_chain+0x10/0x10 [ 2271.324685][T15425] ? mark_lock+0x335/0x3e0 [ 2271.324813][T15425] ? __pfx_validate_chain+0x10/0x10 [ 2271.324942][T15425] __lock_acquire+0xb3f/0x1580 [ 2271.325072][T15425] lock_sync+0xd7/0x180 [ 2271.325171][T15425] ? __synchronize_srcu+0x21/0x2b0 [ 2271.325298][T15425] __synchronize_srcu+0x9e/0x2b0 [ 2271.325424][T15425] ? __pfx___synchronize_srcu+0x10/0x10 [ 2271.325552][T15425] ? hlock_class+0x4e/0x130 [ 2271.325684][T15425] ? mark_lock+0x38/0x3e0 [ 2271.325782][T15425] ? kvm_clock_get_cycles+0x18/0x30 [ 2271.325910][T15425] ? ktime_get_mono_fast_ns+0x84/0x360 [ 2271.326041][T15425] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 2271.326200][T15425] __rtnl_link_unregister+0x14a/0x380 [ 2271.326328][T15425] ? mark_lock+0x38/0x3e0 [ 2271.326424][T15425] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 2271.326587][T15425] ? mark_held_locks+0x9e/0xe0 [ 2271.326716][T15425] rtnl_link_unregister+0x14c/0x1c0 [ 2271.326846][T15425] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 2271.326973][T15425] ? __pfx_woken_wake_function+0x10/0x10 [ 2271.327104][T15425] nsim_module_exit+0x10/0x1a [netdevsim] [ 2271.327242][T15425] __do_sys_delete_module+0x2bd/0x470 [ 2271.327370][T15425] ? __pfx___do_sys_delete_module+0x10/0x10 [ 2271.327524][T15425] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 2271.327687][T15425] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 2271.327843][T15425] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 2271.327984][T15425] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 2271.328140][T15425] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 2271.328298][T15425] do_syscall_64+0xc1/0x1d0 [ 2271.328427][T15425] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 2271.328585][T15425] RIP: 0033:0x7f248ee5e5ab [ 2271.328723][T15425] 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 [ 2271.329171][T15425] RSP: 002b:00007ffe9460eac8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 2271.329367][T15425] RAX: ffffffffffffffda RBX: 00005602c5499ab0 RCX: 00007f248ee5e5ab [ 2271.329557][T15425] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005602c5499b18 [ 2271.329750][T15425] RBP: 00005602c5499ab0 R08: 0000000000000000 R09: 0000000000000000 [ 2271.329941][T15425] R10: 00007f248efbdac0 R11: 0000000000000206 R12: 00005602c5499b18 [ 2271.330132][T15425] R13: 0000000000000000 R14: 00005602c5499b18 R15: 00007ffe94610df8 [ 2271.330324][T15425]