[ 25.995851][ T256] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 44.407234][ T478] devlink (478) used greatest stack depth: 24000 bytes left [ 59.691335][ T604] Failed to register fib notifier [ 119.928094][ T1193] Failed to register fib notifier [ 154.921067][ T1561] Failed to register fib notifier [ 179.854414][ T1851] ip (1851) used greatest stack depth: 23712 bytes left [ 211.921754][ T2150] Failed to register fib notifier [ 213.946063][ T2181] [ 213.946172][ T2181] ====================================================== [ 213.946385][ T2181] WARNING: possible circular locking dependency detected [ 213.946580][ T2181] 6.12.0-rc5-virtme #1 Not tainted [ 213.946732][ T2181] ------------------------------------------------------ [ 213.946930][ T2181] modprobe/2181 is trying to acquire lock: [ 213.947122][ T2181] ffffffffc0485420 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 213.947403][ T2181] [ 213.947403][ T2181] but task is already holding lock: [ 213.947629][ T2181] ffffffff8ebd3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 213.947903][ T2181] [ 213.947903][ T2181] which lock already depends on the new lock. [ 213.947903][ T2181] [ 213.948201][ T2181] [ 213.948201][ T2181] the existing dependency chain (in reverse order) is: [ 213.948463][ T2181] [ 213.948463][ T2181] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 213.948700][ T2181] __lock_acquire+0xb3f/0x1580 [ 213.948858][ T2181] lock_acquire.part.0+0xeb/0x330 [ 213.949013][ T2181] __mutex_lock+0x149/0xac0 [ 213.949171][ T2181] rtnl_newlink+0x64b/0xa30 [ 213.949323][ T2181] rtnetlink_rcv_msg+0x712/0xc10 [ 213.949478][ T2181] netlink_rcv_skb+0x130/0x360 [ 213.949632][ T2181] netlink_unicast+0x44b/0x710 [ 213.949785][ T2181] netlink_sendmsg+0x723/0xbe0 [ 213.949937][ T2181] ____sys_sendmsg+0x7ac/0xa10 [ 213.950092][ T2181] ___sys_sendmsg+0xee/0x170 [ 213.950245][ T2181] __sys_sendmsg+0xcd/0x170 [ 213.950400][ T2181] do_syscall_64+0xc1/0x1d0 [ 213.950553][ T2181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 213.950746][ T2181] [ 213.950746][ T2181] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 213.950978][ T2181] check_prev_add+0x182/0xce0 [ 213.951137][ T2181] validate_chain+0x71d/0x9b0 [ 213.951327][ T2181] __lock_acquire+0xb3f/0x1580 [ 213.951496][ T2181] lock_sync+0xd7/0x180 [ 213.951647][ T2181] __synchronize_srcu+0x9e/0x2b0 [ 213.951808][ T2181] __rtnl_link_unregister+0x14a/0x380 [ 213.952009][ T2181] rtnl_link_unregister+0x14c/0x1c0 [ 213.952164][ T2181] nsim_module_exit+0x10/0x1a [netdevsim] [ 213.952371][ T2181] __do_sys_delete_module+0x2bd/0x470 [ 213.952575][ T2181] do_syscall_64+0xc1/0x1d0 [ 213.952744][ T2181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 213.952935][ T2181] [ 213.952935][ T2181] other info that might help us debug this: [ 213.952935][ T2181] [ 213.953255][ T2181] Possible unsafe locking scenario: [ 213.953255][ T2181] [ 213.953493][ T2181] CPU0 CPU1 [ 213.953643][ T2181] ---- ---- [ 213.953804][ T2181] lock(rtnl_mutex); [ 213.953922][ T2181] lock(&ops->srcu); [ 213.954119][ T2181] lock(rtnl_mutex); [ 213.954319][ T2181] sync(&ops->srcu); [ 213.954435][ T2181] [ 213.954435][ T2181] *** DEADLOCK *** [ 213.954435][ T2181] [ 213.954665][ T2181] 2 locks held by modprobe/2181: [ 213.954827][ T2181] #0: ffffffff8ebb8790 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 213.955145][ T2181] #1: ffffffff8ebd3a88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 213.955429][ T2181] [ 213.955429][ T2181] stack backtrace: [ 213.955623][ T2181] CPU: 0 UID: 0 PID: 2181 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 213.955863][ T2181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 213.956304][ T2181] Call Trace: [ 213.956426][ T2181] [ 213.956504][ T2181] dump_stack_lvl+0x82/0xd0 [ 213.956662][ T2181] print_circular_bug+0x2e2/0x4b0 [ 213.956816][ T2181] check_noncircular+0x2f9/0x3e0 [ 213.956969][ T2181] ? __pfx_check_noncircular+0x10/0x10 [ 213.957122][ T2181] ? __kernel_text_address+0x12/0x40 [ 213.957276][ T2181] ? unwind_get_return_address+0x5e/0xa0 [ 213.957433][ T2181] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 213.957694][ T2181] ? arch_stack_walk+0xa2/0xf0 [ 213.957851][ T2181] ? alloc_chain_hlocks+0x4e0/0x720 [ 213.958008][ T2181] check_prev_add+0x182/0xce0 [ 213.958160][ T2181] ? __pfx_stack_trace_save+0x10/0x10 [ 213.958380][ T2181] validate_chain+0x71d/0x9b0 [ 213.958535][ T2181] ? __pfx_validate_chain+0x10/0x10 [ 213.958688][ T2181] ? mark_lock+0x335/0x3e0 [ 213.958842][ T2181] ? __pfx_validate_chain+0x10/0x10 [ 213.958997][ T2181] __lock_acquire+0xb3f/0x1580 [ 213.959289][ T2181] lock_sync+0xd7/0x180 [ 213.959412][ T2181] ? __synchronize_srcu+0x21/0x2b0 [ 213.959572][ T2181] __synchronize_srcu+0x9e/0x2b0 [ 213.959725][ T2181] ? __pfx___synchronize_srcu+0x10/0x10 [ 213.959946][ T2181] ? hlock_class+0x4e/0x130 [ 213.960097][ T2181] ? mark_lock+0x38/0x3e0 [ 213.960213][ T2181] ? kvm_clock_get_cycles+0x18/0x30 [ 213.960365][ T2181] ? ktime_get_mono_fast_ns+0x84/0x360 [ 213.960518][ T2181] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 213.960799][ T2181] __rtnl_link_unregister+0x14a/0x380 [ 213.960960][ T2181] ? mark_lock+0x38/0x3e0 [ 213.961080][ T2181] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 213.961291][ T2181] ? mark_held_locks+0x9e/0xe0 [ 213.961517][ T2181] rtnl_link_unregister+0x14c/0x1c0 [ 213.961678][ T2181] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 213.961830][ T2181] ? __pfx_woken_wake_function+0x10/0x10 [ 213.961986][ T2181] nsim_module_exit+0x10/0x1a [netdevsim] [ 213.962149][ T2181] __do_sys_delete_module+0x2bd/0x470 [ 213.962305][ T2181] ? __pfx___do_sys_delete_module+0x10/0x10 [ 213.962567][ T2181] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 213.962842][ T2181] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 213.963112][ T2181] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 213.963267][ T2181] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 213.963544][ T2181] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 213.963737][ T2181] do_syscall_64+0xc1/0x1d0 [ 213.963893][ T2181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 213.964085][ T2181] RIP: 0033:0x7ff68b01a5ab [ 213.964244][ T2181] 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 [ 213.964858][ T2181] RSP: 002b:00007ffffdeed3e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 213.965159][ T2181] RAX: ffffffffffffffda RBX: 000055ecfe0b7980 RCX: 00007ff68b01a5ab [ 213.965387][ T2181] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055ecfe0b79e8 [ 213.965613][ T2181] RBP: 000055ecfe0b7980 R08: 0000000000000000 R09: 0000000000000000 [ 213.965913][ T2181] R10: 00007ff68b179ac0 R11: 0000000000000206 R12: 000055ecfe0b79e8 [ 213.966141][ T2181] R13: 0000000000000000 R14: 000055ecfe0b79e8 R15: 00007ffffdeef718 [ 213.966374][ T2181]