[ 66.777004][ T413] netdevsim netdevsim311 eni311np1: renamed from eth0
[ 66.859594][ T414] netdevsim netdevsim761 eni761np1: renamed from eth1
[ 75.710837][ T477]
[ 75.711061][ T477] ======================================================
[ 75.711332][ T477] WARNING: possible circular locking dependency detected
[ 75.711576][ T477] 6.12.0-rc5-virtme #1 Not tainted
[ 75.711732][ T477] ------------------------------------------------------
[ 75.711924][ T477] modprobe/477 is trying to acquire lock:
[ 75.712080][ T477] ffffffffc0536700 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0
[ 75.712363][ T477]
[ 75.712363][ T477] but task is already holding lock:
[ 75.712614][ T477] ffffffffb4df7d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 75.712985][ T477]
[ 75.712985][ T477] which lock already depends on the new lock.
[ 75.712985][ T477]
[ 75.713400][ T477]
[ 75.713400][ T477] the existing dependency chain (in reverse order) is:
[ 75.713701][ T477]
[ 75.713701][ T477] -> #1 (rtnl_mutex){+.+.}-{3:3}:
[ 75.713943][ T477] __lock_acquire+0xb3f/0x1580
[ 75.714102][ T477] lock_acquire.part.0+0xeb/0x330
[ 75.714272][ T477] __mutex_lock+0x149/0xac0
[ 75.714440][ T477] rtnl_newlink+0x64b/0xa30
[ 75.714597][ T477] rtnetlink_rcv_msg+0x712/0xc10
[ 75.714752][ T477] netlink_rcv_skb+0x130/0x360
[ 75.714907][ T477] netlink_unicast+0x44b/0x710
[ 75.715078][ T477] netlink_sendmsg+0x723/0xbe0
[ 75.715237][ T477] ____sys_sendmsg+0x7ac/0xa10
[ 75.715396][ T477] ___sys_sendmsg+0xee/0x170
[ 75.715557][ T477] __sys_sendmsg+0xcd/0x170
[ 75.715718][ T477] do_syscall_64+0xc1/0x1d0
[ 75.715885][ T477] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 75.716076][ T477]
[ 75.716076][ T477] -> #0 (&ops->srcu){.+.+}-{0:0}:
[ 75.716316][ T477] check_prev_add+0x182/0xce0
[ 75.716471][ T477] validate_chain+0x71d/0x9b0
[ 75.716627][ T477] __lock_acquire+0xb3f/0x1580
[ 75.716782][ T477] lock_sync+0xd7/0x180
[ 75.716936][ T477] __synchronize_srcu+0x9e/0x2b0
[ 75.717103][ T477] __rtnl_link_unregister+0x14a/0x380
[ 75.717295][ T477] rtnl_link_unregister+0x14c/0x1c0
[ 75.717452][ T477] nsim_module_exit+0x10/0x1a [netdevsim]
[ 75.717672][ T477] __do_sys_delete_module+0x2bd/0x470
[ 75.717882][ T477] do_syscall_64+0xc1/0x1d0
[ 75.718040][ T477] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 75.718258][ T477]
[ 75.718258][ T477] other info that might help us debug this:
[ 75.718258][ T477]
[ 75.718582][ T477] Possible unsafe locking scenario:
[ 75.718582][ T477]
[ 75.718815][ T477] CPU0 CPU1
[ 75.718973][ T477] ---- ----
[ 75.719144][ T477] lock(rtnl_mutex);
[ 75.719264][ T477] lock(&ops->srcu);
[ 75.719494][ T477] lock(rtnl_mutex);
[ 75.719699][ T477] sync(&ops->srcu);
[ 75.719819][ T477]
[ 75.719819][ T477] *** DEADLOCK ***
[ 75.719819][ T477]
[ 75.720054][ T477] 2 locks held by modprobe/477:
[ 75.720213][ T477] #0: ffffffffb4ddc8d0 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0
[ 75.720536][ T477] #1: ffffffffb4df7d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0
[ 75.720834][ T477]
[ 75.720834][ T477] stack backtrace:
[ 75.721025][ T477] CPU: 1 UID: 0 PID: 477 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1
[ 75.721252][ T477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 75.721647][ T477] Call Trace:
[ 75.721810][ T477] <TASK>
[ 75.721916][ T477] dump_stack_lvl+0x82/0xd0
[ 75.722129][ T477] print_circular_bug+0x2e2/0x4b0
[ 75.722339][ T477] check_noncircular+0x2f9/0x3e0
[ 75.722551][ T477] ? __pfx_check_noncircular+0x10/0x10
[ 75.722738][ T477] ? __kernel_text_address+0x12/0x40
[ 75.722892][ T477] ? unwind_get_return_address+0x5e/0xa0
[ 75.723045][ T477] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 75.723243][ T477] ? arch_stack_walk+0xa2/0xf0
[ 75.723396][ T477] ? alloc_chain_hlocks+0x4e0/0x720
[ 75.723564][ T477] check_prev_add+0x182/0xce0
[ 75.723720][ T477] ? __pfx_stack_trace_save+0x10/0x10
[ 75.723876][ T477] validate_chain+0x71d/0x9b0
[ 75.724037][ T477] ? __pfx_validate_chain+0x10/0x10
[ 75.724194][ T477] ? mark_lock+0x335/0x3e0
[ 75.724349][ T477] ? __pfx_validate_chain+0x10/0x10
[ 75.724525][ T477] __lock_acquire+0xb3f/0x1580
[ 75.724685][ T477] lock_sync+0xd7/0x180
[ 75.724804][ T477] ? __synchronize_srcu+0x21/0x2b0
[ 75.724964][ T477] __synchronize_srcu+0x9e/0x2b0
[ 75.725121][ T477] ? __pfx___synchronize_srcu+0x10/0x10
[ 75.725278][ T477] ? hlock_class+0x4e/0x130
[ 75.725436][ T477] ? mark_lock+0x38/0x3e0
[ 75.725559][ T477] ? kvm_clock_get_cycles+0x18/0x30
[ 75.725721][ T477] ? ktime_get_mono_fast_ns+0x84/0x360
[ 75.725900][ T477] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 75.726104][ T477] __rtnl_link_unregister+0x14a/0x380
[ 75.726268][ T477] ? mark_lock+0x38/0x3e0
[ 75.726392][ T477] ? __pfx___rtnl_link_unregister+0x10/0x10
[ 75.726603][ T477] ? mark_held_locks+0x9e/0xe0
[ 75.726780][ T477] rtnl_link_unregister+0x14c/0x1c0
[ 75.726948][ T477] ? __pfx_rtnl_link_unregister+0x10/0x10
[ 75.727109][ T477] ? __pfx_woken_wake_function+0x10/0x10
[ 75.727265][ T477] nsim_module_exit+0x10/0x1a [netdevsim]
[ 75.727429][ T477] __do_sys_delete_module+0x2bd/0x470
[ 75.727587][ T477] ? __pfx___do_sys_delete_module+0x10/0x10
[ 75.727781][ T477] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 75.727976][ T477] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 75.728172][ T477] ? trace_rcu_segcb_stats+0x37/0x1e0
[ 75.728326][ T477] ? __pfx_slab_free_after_rcu_debug+0x10/0x10
[ 75.728520][ T477] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 75.728715][ T477] do_syscall_64+0xc1/0x1d0
[ 75.728879][ T477] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 75.729070][ T477] RIP: 0033:0x7fc6f9fde5ab
[ 75.729227][ T477] 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
[ 75.729817][ T477] RSP: 002b:00007ffe6ef01a58 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 75.730063][ T477] RAX: ffffffffffffffda RBX: 0000564c5e47fab0 RCX: 00007fc6f9fde5ab
[ 75.730301][ T477] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000564c5e47fb18
[ 75.730536][ T477] RBP: 0000564c5e47fab0 R08: 0000000000000000 R09: 0000000000000000
[ 75.730778][ T477] R10: 00007fc6fa13dac0 R11: 0000000000000206 R12: 0000564c5e47fb18
[ 75.731024][ T477] R13: 0000000000000000 R14: 0000564c5e47fb18 R15: 00007ffe6ef03d88
[ 75.731255][ T477] </TASK>