[ 1098.139050][ T7484] netdevsim netdevsim473 eni473np1: renamed from eth0 [ 1098.242785][ T7485] netdevsim netdevsim700 eni700np1: renamed from eth1 [ 1106.026832][ T7543] [ 1106.026929][ T7543] ====================================================== [ 1106.027096][ T7543] WARNING: possible circular locking dependency detected [ 1106.027266][ T7543] 6.12.0-rc5-virtme #1 Not tainted [ 1106.027396][ T7543] ------------------------------------------------------ [ 1106.027558][ T7543] modprobe/7543 is trying to acquire lock: [ 1106.027723][ T7543] ffffffffc06817c0 (&ops->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x21/0x2b0 [ 1106.027966][ T7543] [ 1106.027966][ T7543] but task is already holding lock: [ 1106.028155][ T7543] ffffffffb07f7f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 1106.028392][ T7543] [ 1106.028392][ T7543] which lock already depends on the new lock. [ 1106.028392][ T7543] [ 1106.028638][ T7543] [ 1106.028638][ T7543] the existing dependency chain (in reverse order) is: [ 1106.028861][ T7543] [ 1106.028861][ T7543] -> #1 (rtnl_mutex){+.+.}-{3:3}: [ 1106.029063][ T7543] __lock_acquire+0xb3f/0x1580 [ 1106.029201][ T7543] lock_acquire.part.0+0xeb/0x330 [ 1106.029329][ T7543] __mutex_lock+0x149/0xac0 [ 1106.029461][ T7543] rtnl_newlink+0x64f/0xa20 [ 1106.029593][ T7543] rtnetlink_rcv_msg+0x712/0xc10 [ 1106.029724][ T7543] netlink_rcv_skb+0x130/0x360 [ 1106.029856][ T7543] netlink_unicast+0x44b/0x710 [ 1106.029985][ T7543] netlink_sendmsg+0x723/0xbe0 [ 1106.030114][ T7543] ____sys_sendmsg+0x7ac/0xa10 [ 1106.030242][ T7543] ___sys_sendmsg+0xee/0x170 [ 1106.030373][ T7543] __sys_sendmsg+0xcd/0x170 [ 1106.030501][ T7543] do_syscall_64+0xc1/0x1d0 [ 1106.030632][ T7543] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1106.030794][ T7543] [ 1106.030794][ T7543] -> #0 (&ops->srcu){.+.+}-{0:0}: [ 1106.030993][ T7543] check_prev_add+0x182/0xce0 [ 1106.031123][ T7543] validate_chain+0x71d/0x9b0 [ 1106.031253][ T7543] __lock_acquire+0xb3f/0x1580 [ 1106.031388][ T7543] lock_sync+0xd7/0x180 [ 1106.031533][ T7543] __synchronize_srcu+0x9e/0x2b0 [ 1106.031663][ T7543] __rtnl_link_unregister+0x14a/0x380 [ 1106.031846][ T7543] rtnl_link_unregister+0x14c/0x1c0 [ 1106.031972][ T7543] nsim_module_exit+0x10/0x1a [netdevsim] [ 1106.032143][ T7543] __do_sys_delete_module+0x2bd/0x470 [ 1106.032302][ T7543] do_syscall_64+0xc1/0x1d0 [ 1106.032429][ T7543] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1106.032594][ T7543] [ 1106.032594][ T7543] other info that might help us debug this: [ 1106.032594][ T7543] [ 1106.032840][ T7543] Possible unsafe locking scenario: [ 1106.032840][ T7543] [ 1106.033026][ T7543] CPU0 CPU1 [ 1106.033153][ T7543] ---- ---- [ 1106.033276][ T7543] lock(rtnl_mutex); [ 1106.033372][ T7543] lock(&ops->srcu); [ 1106.033531][ T7543] lock(rtnl_mutex); [ 1106.033690][ T7543] sync(&ops->srcu); [ 1106.033789][ T7543] [ 1106.033789][ T7543] *** DEADLOCK *** [ 1106.033789][ T7543] [ 1106.033971][ T7543] 2 locks held by modprobe/7543: [ 1106.034100][ T7543] #0: ffffffffb07dcb10 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister+0xa6/0x1c0 [ 1106.034363][ T7543] #1: ffffffffb07f7f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister+0x10c/0x1c0 [ 1106.034587][ T7543] [ 1106.034587][ T7543] stack backtrace: [ 1106.034748][ T7543] CPU: 0 UID: 0 PID: 7543 Comm: modprobe Not tainted 6.12.0-rc5-virtme #1 [ 1106.034941][ T7543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1106.035224][ T7543] Call Trace: [ 1106.035329][ T7543] [ 1106.035399][ T7543] dump_stack_lvl+0x82/0xd0 [ 1106.035534][ T7543] print_circular_bug+0x2e2/0x4b0 [ 1106.035663][ T7543] check_noncircular+0x2f9/0x3e0 [ 1106.035795][ T7543] ? __pfx_check_noncircular+0x10/0x10 [ 1106.035928][ T7543] ? __kernel_text_address+0x12/0x40 [ 1106.036059][ T7543] ? unwind_get_return_address+0x5e/0xa0 [ 1106.036189][ T7543] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 1106.036348][ T7543] ? arch_stack_walk+0xa2/0xf0 [ 1106.036482][ T7543] ? alloc_chain_hlocks+0x4e0/0x720 [ 1106.036611][ T7543] check_prev_add+0x182/0xce0 [ 1106.036739][ T7543] ? __pfx_stack_trace_save+0x10/0x10 [ 1106.036870][ T7543] validate_chain+0x71d/0x9b0 [ 1106.037004][ T7543] ? __pfx_validate_chain+0x10/0x10 [ 1106.037131][ T7543] ? mark_lock+0x335/0x3e0 [ 1106.037258][ T7543] ? __pfx_validate_chain+0x10/0x10 [ 1106.037386][ T7543] __lock_acquire+0xb3f/0x1580 [ 1106.037518][ T7543] lock_sync+0xd7/0x180 [ 1106.037629][ T7543] ? __synchronize_srcu+0x21/0x2b0 [ 1106.037758][ T7543] __synchronize_srcu+0x9e/0x2b0 [ 1106.037888][ T7543] ? __pfx___synchronize_srcu+0x10/0x10 [ 1106.038016][ T7543] ? hlock_class+0x4e/0x130 [ 1106.038150][ T7543] ? mark_lock+0x38/0x3e0 [ 1106.038249][ T7543] ? kvm_clock_get_cycles+0x18/0x30 [ 1106.038379][ T7543] ? ktime_get_mono_fast_ns+0x84/0x360 [ 1106.038511][ T7543] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1106.038673][ T7543] __rtnl_link_unregister+0x14a/0x380 [ 1106.038800][ T7543] ? mark_lock+0x38/0x3e0 [ 1106.038898][ T7543] ? __pfx___rtnl_link_unregister+0x10/0x10 [ 1106.039056][ T7543] ? mark_held_locks+0x9e/0xe0 [ 1106.039184][ T7543] rtnl_link_unregister+0x14c/0x1c0 [ 1106.039319][ T7543] ? __pfx_rtnl_link_unregister+0x10/0x10 [ 1106.039444][ T7543] ? __pfx_woken_wake_function+0x10/0x10 [ 1106.039577][ T7543] nsim_module_exit+0x10/0x1a [netdevsim] [ 1106.039716][ T7543] __do_sys_delete_module+0x2bd/0x470 [ 1106.039849][ T7543] ? __pfx___do_sys_delete_module+0x10/0x10 [ 1106.040005][ T7543] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1106.040164][ T7543] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1106.040324][ T7543] ? trace_rcu_segcb_stats+0x37/0x1e0 [ 1106.040453][ T7543] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1106.040612][ T7543] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1106.040770][ T7543] do_syscall_64+0xc1/0x1d0 [ 1106.040906][ T7543] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1106.041062][ T7543] RIP: 0033:0x7f53f8df95ab [ 1106.041196][ T7543] 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 [ 1106.041657][ T7543] RSP: 002b:00007ffccaf76b48 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 1106.041853][ T7543] RAX: ffffffffffffffda RBX: 000055bfde6dfab0 RCX: 00007f53f8df95ab [ 1106.042048][ T7543] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055bfde6dfb18 [ 1106.042242][ T7543] RBP: 000055bfde6dfab0 R08: 0000000000000000 R09: 0000000000000000 [ 1106.042431][ T7543] R10: 00007f53f8f58ac0 R11: 0000000000000206 R12: 000055bfde6dfb18 [ 1106.042623][ T7543] R13: 0000000000000000 R14: 000055bfde6dfb18 R15: 00007ffccaf78e78 [ 1106.042821][ T7543]