[ 27.429706][ T249] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 27.578248][ T252] devlink (252) used greatest stack depth: 24144 bytes left [ 60.634408][ T387] ip (387) used greatest stack depth: 23288 bytes left [ 114.060467][ T641] [ 114.060566][ T641] ====================================================== [ 114.060746][ T641] WARNING: possible circular locking dependency detected [ 114.060917][ T641] 6.12.0-rc5-virtme #1 Not tainted [ 114.061057][ T641] ------------------------------------------------------ [ 114.061231][ T641] modprobe/641 is trying to acquire lock: [ 114.061369][ T641] ffffffffc03664e0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 114.061627][ T641] [ 114.061627][ T641] but task is already holding lock: [ 114.061831][ T641] ffffffffb55d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 114.062086][ T641] [ 114.062086][ T641] which lock already depends on the new lock. [ 114.062086][ T641] [ 114.062358][ T641] [ 114.062358][ T641] the existing dependency chain (in reverse order) is: [ 114.062603][ T641] [ 114.062603][ T641] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 114.062815][ T641] __lock_acquire+0xb3f/0x1580 [ 114.062962][ T641] lock_acquire.part.0+0xeb/0x330 [ 114.063105][ T641] __mutex_lock+0x149/0xac0 [ 114.063249][ T641] rtnl_newlink+0x64f/0xa20 [ 114.063390][ T641] rtnetlink_rcv_msg+0x712/0xc10 [ 114.063530][ T641] netlink_rcv_skb+0x130/0x360 [ 114.063672][ T641] netlink_unicast+0x44b/0x710 [ 114.063810][ T641] netlink_sendmsg+0x723/0xbe0 [ 114.063952][ T641] ____sys_sendmsg+0x7ac/0xa10 [ 114.064104][ T641] ___sys_sendmsg+0xee/0x170 [ 114.064247][ T641] __sys_sendmsg+0xcd/0x170 [ 114.064388][ T641] do_syscall_64+0xc1/0x1d0 [ 114.064532][ T641] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 114.064709][ T641] [ 114.064709][ T641] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 114.064927][ T641] check_prev_add+0x182/0xce0 [ 114.065073][ T641] validate_chain+0x71d/0x9b0 [ 114.065214][ T641] __lock_acquire+0xb3f/0x1580 [ 114.065359][ T641] lock_sync+0xd7/0x180 [ 114.065501][ T641] __synchronize_srcu+0x9e/0x2b0 [ 114.065646][ T641] __rtnl_link_unregister+0x14a/0x380 [ 114.065821][ T641] rtnl_link_unregister+0x14c/0x1c0 [ 114.065966][ T641] nsim_module_exit+0x10/0x1a [netdevsim] [ 114.066163][ T641] __do_sys_delete_module+0x2bd/0x470 [ 114.066334][ T641] do_syscall_64+0xc1/0x1d0 [ 114.066475][ T641] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 114.066648][ T641] [ 114.066648][ T641] other info that might help us debug this: [ 114.066648][ T641] [ 114.066916][ T641] Possible unsafe locking scenario: [ 114.066916][ T641] [ 114.067126][ T641] CPU0 CPU1 [ 114.067339][ T641] ---- ---- [ 114.067491][ T641] lock(rtnl_mutex); [ 114.067599][ T641] lock(&ops->srcu); [ 114.067774][ T641] lock(rtnl_mutex); [ 114.068017][ T641] sync(&ops->srcu); [ 114.068126][ T641] [ 114.068126][ T641] *** DEADLOCK *** [ 114.068126][ T641] [ 114.068339][ T641] 2 locks held by modprobe/641: [ 114.068481][ T641] #0: ffffffffb55b8890 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 114.068837][ T641] #1: ffffffffb55d3b88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 114.069085][ T641] [ 114.069085][ T641] stack backtrace: [ 114.069257][ T641] CPU: 3 UID: 0 PID: 641 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 114.069534][ T641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 114.069845][ T641] Call Trace: [ 114.070022][ T641] [ 114.070095][ T641] dump_stack_lvl+0x82/0xd0 [ 114.070242][ T641] print_circular_bug+0x2e2/0x4b0 [ 114.070384][ T641] check_noncircular+0x2f9/0x3e0 [ 114.070525][ T641] ? __pfx_check_noncircular+0x10/0x10 [ 114.070872][ T641] ? __kernel_text_address+0x12/0x40 [ 114.071020][ T641] ? unwind_get_return_address+0x5e/0xa0 [ 114.071167][ T641] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 114.071360][ T641] ? arch_stack_walk+0xa2/0xf0 [ 114.071577][ T641] ? alloc_chain_hlocks+0x4e0/0x720 [ 114.071721][ T641] check_prev_add+0x182/0xce0 [ 114.071859][ T641] ? __pfx_stack_trace_save+0x10/0x10 [ 114.071999][ T641] validate_chain+0x71d/0x9b0 [ 114.072211][ T641] ? __pfx_validate_chain+0x10/0x10 [ 114.072352][ T641] ? mark_lock+0x335/0x3e0 [ 114.072492][ T641] ? __pfx_validate_chain+0x10/0x10 [ 114.072634][ T641] __lock_acquire+0xb3f/0x1580 [ 114.072783][ T641] lock_sync+0xd7/0x180 [ 114.072961][ T641] ? __synchronize_srcu+0x21/0x2b0 [ 114.073105][ T641] __synchronize_srcu+0x9e/0x2b0 [ 114.073248][ T641] ? __pfx___synchronize_srcu+0x10/0x10 [ 114.073392][ T641] ? hlock_class+0x4e/0x130 [ 114.073605][ T641] ? mark_lock+0x38/0x3e0 [ 114.073787][ T641] ? kvm_clock_get_cycles+0x18/0x30 [ 114.073929][ T641] ? ktime_get_mono_fast_ns+0x84/0x360 [ 114.074087][ T641] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 114.074266][ T641] __rtnl_link_unregister+0x14a/0x380 [ 114.074414][ T641] ? mark_lock+0x38/0x3e0 [ 114.074590][ T641] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 114.074772][ T641] ? mark_held_locks+0x9e/0xe0 [ 114.074914][ T641] rtnl_link_unregister+0x14c/0x1c0 [ 114.075140][ T641] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 114.075284][ T641] ? __pfx_woken_wake_function+0x10/0x10 [ 114.075430][ T641] nsim_module_exit+0x10/0x1a [netdevsim] [ 114.075583][ T641] __do_sys_delete_module+0x2bd/0x470 [ 114.075723][ T641] ? __pfx___do_sys_delete_module+0x10/0x10 [ 114.075895][ T641] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 114.076071][ T641] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 114.076395][ T641] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 114.076541][ T641] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 114.076710][ T641] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 114.076888][ T641] do_syscall_64+0xc1/0x1d0 [ 114.077031][ T641] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 114.077210][ T641] RIP: 0033:0x7f70f7ddc5ab [ 114.077365][ T641] 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 [ 114.077945][ T641] RSP: 002b:00007ffe2b4bfc58 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 114.078165][ T641] RAX: ffffffffffffffda RBX: 000055cb344d4980 RCX: 00007f70f7ddc5ab [ 114.078379][ T641] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055cb344d49e8 [ 114.078669][ T641] RBP: 000055cb344d4980 R08: 0000000000000000 R09: 0000000000000000 [ 114.078878][ T641] R10: 00007f70f7f3bac0 R11: 0000000000000206 R12: 000055cb344d49e8 [ 114.079087][ T641] R13: 0000000000000000 R14: 000055cb344d49e8 R15: 00007ffe2b4c1f88 [ 114.079297][ T641]