[ 28.560041][ T256] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 29.833405][ T269] ip (269) used greatest stack depth: 23544 bytes left [ 63.877118][ T605] Failed to register fib notifier [ 74.010959][ T729] ip (729) used greatest stack depth: 23408 bytes left [ 123.129234][ T1194] Failed to register fib notifier [ 158.524673][ T1562] Failed to register fib notifier [ 219.115873][ T2152] Failed to register fib notifier [ 221.155382][ T2183] [ 221.155484][ T2183] ====================================================== [ 221.155656][ T2183] WARNING: possible circular locking dependency detected [ 221.155826][ T2183] 6.12.0-rc5-virtme #1 Not tainted [ 221.155964][ T2183] ------------------------------------------------------ [ 221.156135][ T2183] modprobe/2183 is trying to acquire lock: [ 221.156337][ T2183] ffffffffc03334e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 221.156596][ T2183] [ 221.156596][ T2183] but task is already holding lock: [ 221.156802][ T2183] ffffffffa65d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 221.157058][ T2183] [ 221.157058][ T2183] which lock already depends on the new lock. [ 221.157058][ T2183] [ 221.157327][ T2183] [ 221.157327][ T2183] the existing dependency chain (in reverse order) is: [ 221.157564][ T2183] [ 221.157564][ T2183] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 221.157780][ T2183] __lock_acquire+0xb3f/0x1580 [ 221.157927][ T2183] lock_acquire.part.0+0xeb/0x330 [ 221.158070][ T2183] __mutex_lock+0x149/0xac0 [ 221.158215][ T2183] rtnl_newlink+0x64f/0xa20 [ 221.158353][ T2183] rtnetlink_rcv_msg+0x712/0xc10 [ 221.158493][ T2183] netlink_rcv_skb+0x130/0x360 [ 221.158634][ T2183] netlink_unicast+0x44b/0x710 [ 221.158770][ T2183] netlink_sendmsg+0x723/0xbe0 [ 221.158912][ T2183] ____sys_sendmsg+0x7ac/0xa10 [ 221.159052][ T2183] ___sys_sendmsg+0xee/0x170 [ 221.159193][ T2183] __sys_sendmsg+0xcd/0x170 [ 221.159333][ T2183] do_syscall_64+0xc1/0x1d0 [ 221.159476][ T2183] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 221.159670][ T2183] [ 221.159670][ T2183] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 221.159882][ T2183] check_prev_add+0x182/0xce0 [ 221.160022][ T2183] validate_chain+0x71d/0x9b0 [ 221.160157][ T2183] __lock_acquire+0xb3f/0x1580 [ 221.160322][ T2183] lock_sync+0xd7/0x180 [ 221.160459][ T2183] __synchronize_srcu+0x9e/0x2b0 [ 221.160593][ T2183] __rtnl_link_unregister+0x14a/0x380 [ 221.160766][ T2183] rtnl_link_unregister+0x14c/0x1c0 [ 221.160908][ T2183] nsim_module_exit+0x10/0x1a [netdevsim] [ 221.161088][ T2183] __do_sys_delete_module+0x2bd/0x470 [ 221.161256][ T2183] do_syscall_64+0xc1/0x1d0 [ 221.161390][ T2183] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 221.161556][ T2183] [ 221.161556][ T2183] other info that might help us debug this: [ 221.161556][ T2183] [ 221.161815][ T2183] Possible unsafe locking scenario: [ 221.161815][ T2183] [ 221.162016][ T2183] CPU0 CPU1 [ 221.162150][ T2183] ---- ---- [ 221.162283][ T2183] lock(rtnl_mutex); [ 221.162389][ T2183] lock(&ops->srcu); [ 221.162555][ T2183] lock(rtnl_mutex); [ 221.162720][ T2183] sync(&ops->srcu); [ 221.162823][ T2183] [ 221.162823][ T2183] *** DEADLOCK *** [ 221.162823][ T2183] [ 221.163022][ T2183] 2 locks held by modprobe/2183: [ 221.163158][ T2183] #0: ffffffffa65b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 221.163433][ T2183] #1: ffffffffa65d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 221.163673][ T2183] [ 221.163673][ T2183] stack backtrace: [ 221.163836][ T2183] CPU: 2 UID: 0 PID: 2183 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 221.164041][ T2183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 221.164362][ T2183] Call Trace: [ 221.164472][ T2183] [ 221.164543][ T2183] dump_stack_lvl+0x82/0xd0 [ 221.164687][ T2183] print_circular_bug+0x2e2/0x4b0 [ 221.164823][ T2183] check_noncircular+0x2f9/0x3e0 [ 221.164956][ T2183] ? __pfx_check_noncircular+0x10/0x10 [ 221.165090][ T2183] ? __kernel_text_address+0x12/0x40 [ 221.165231][ T2183] ? unwind_get_return_address+0x5e/0xa0 [ 221.165371][ T2183] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 221.165539][ T2183] ? arch_stack_walk+0xa2/0xf0 [ 221.165677][ T2183] ? alloc_chain_hlocks+0x4e0/0x720 [ 221.165815][ T2183] check_prev_add+0x182/0xce0 [ 221.165950][ T2183] ? __pfx_stack_trace_save+0x10/0x10 [ 221.166085][ T2183] validate_chain+0x71d/0x9b0 [ 221.166223][ T2183] ? __pfx_validate_chain+0x10/0x10 [ 221.166358][ T2183] ? mark_lock+0x335/0x3e0 [ 221.166496][ T2183] ? __pfx_validate_chain+0x10/0x10 [ 221.166631][ T2183] __lock_acquire+0xb3f/0x1580 [ 221.166771][ T2183] lock_sync+0xd7/0x180 [ 221.166874][ T2183] ? __synchronize_srcu+0x21/0x2b0 [ 221.167015][ T2183] __synchronize_srcu+0x9e/0x2b0 [ 221.167149][ T2183] ? __pfx___synchronize_srcu+0x10/0x10 [ 221.167286][ T2183] ? hlock_class+0x4e/0x130 [ 221.167423][ T2183] ? mark_lock+0x38/0x3e0 [ 221.167527][ T2183] ? kvm_clock_get_cycles+0x18/0x30 [ 221.167664][ T2183] ? ktime_get_mono_fast_ns+0x84/0x360 [ 221.167802][ T2183] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 221.167972][ T2183] __rtnl_link_unregister+0x14a/0x380 [ 221.168108][ T2183] ? mark_lock+0x38/0x3e0 [ 221.168224][ T2183] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 221.168413][ T2183] ? mark_held_locks+0x9e/0xe0 [ 221.168552][ T2183] rtnl_link_unregister+0x14c/0x1c0 [ 221.168688][ T2183] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 221.168826][ T2183] ? __pfx_woken_wake_function+0x10/0x10 [ 221.168966][ T2183] nsim_module_exit+0x10/0x1a [netdevsim] [ 221.169114][ T2183] __do_sys_delete_module+0x2bd/0x470 [ 221.169251][ T2183] ? __pfx___do_sys_delete_module+0x10/0x10 [ 221.169422][ T2183] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 221.169601][ T2183] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 221.169776][ T2183] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 221.169915][ T2183] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 221.170086][ T2183] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 221.170261][ T2183] do_syscall_64+0xc1/0x1d0 [ 221.170389][ T2183] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 221.170545][ T2183] RIP: 0033:0x7fbca82c45ab [ 221.170678][ T2183] 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 [ 221.171123][ T2183] RSP: 002b:00007ffc3662e058 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 221.171312][ T2183] RAX: ffffffffffffffda RBX: 000055912b4a6980 RCX: 00007fbca82c45ab [ 221.171500][ T2183] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055912b4a69e8 [ 221.171687][ T2183] RBP: 000055912b4a6980 R08: 0000000000000000 R09: 0000000000000000 [ 221.171871][ T2183] R10: 00007fbca8423ac0 R11: 0000000000000206 R12: 000055912b4a69e8 [ 221.172057][ T2183] R13: 0000000000000000 R14: 000055912b4a69e8 R15: 00007ffc36630388 [ 221.172275][ T2183]