[ 10.824858][ T249] ip (249) used greatest stack depth: 24432 bytes left [ 11.175620][ T258] ip (258) used greatest stack depth: 23120 bytes left [ 14.483386][ T307] 8021q: 802.1Q VLAN Support v1.8 [ 15.305702][ T318] gre: GRE over IPv4 demultiplexor driver [ 15.319984][ T318] ip_gre: GRE over IPv4 tunneling driver [ 19.896000][ T375] GACT probability NOT on [ 56.471774][ T546] [ 56.471918][ T546] ============================================ [ 56.472105][ T546] WARNING: possible recursive locking detected [ 56.472288][ T546] 6.13.0-rc5-virtme #1 Not tainted [ 56.472430][ T546] -------------------------------------------- [ 56.472606][ T546] ip/546 is trying to acquire lock: [ 56.472754][ T546] ffffffffa55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.473051][ T546] [ 56.473051][ T546] but task is already holding lock: [ 56.473260][ T546] ffffffffa55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.473552][ T546] [ 56.473552][ T546] other info that might help us debug this: [ 56.473765][ T546] Possible unsafe locking scenario: [ 56.473765][ T546] [ 56.473982][ T546] CPU0 [ 56.474090][ T546] ---- [ 56.474197][ T546] lock((netdev_chain).rwsem); [ 56.474345][ T546] lock((netdev_chain).rwsem); [ 56.474491][ T546] [ 56.474491][ T546] *** DEADLOCK *** [ 56.474491][ T546] [ 56.474704][ T546] May be due to missing lock nesting notation [ 56.474704][ T546] [ 56.474918][ T546] 2 locks held by ip/546: [ 56.475028][ T546] #0: ffffffffa55e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 56.475288][ T546] #1: ffffffffa55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.475578][ T546] [ 56.475578][ T546] stack backtrace: [ 56.475759][ T546] CPU: 2 UID: 0 PID: 546 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 56.475974][ T546] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 56.476152][ T546] Call Trace: [ 56.476263][ T546] [ 56.476338][ T546] dump_stack_lvl+0x82/0xd0 [ 56.476497][ T546] print_deadlock_bug+0x40a/0x650 [ 56.476644][ T546] validate_chain+0x5bf/0xae0 [ 56.476794][ T546] ? __pfx_validate_chain+0x10/0x10 [ 56.476941][ T546] ? hlock_class+0x4e/0x130 [ 56.477085][ T546] ? mark_lock+0x38/0x3e0 [ 56.477197][ T546] __lock_acquire+0xb9a/0x1680 [ 56.477346][ T546] lock_acquire.part.0+0xeb/0x330 [ 56.477488][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 56.477665][ T546] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 56.477846][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.477996][ T546] ? trace_lock_acquire+0x14c/0x1f0 [ 56.478140][ T546] ? lock_acquire+0x32/0xc0 [ 56.478282][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 56.478462][ T546] down_read+0x9f/0x340 [ 56.478571][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 56.478751][ T546] ? __pfx_down_read+0x10/0x10 [ 56.478893][ T546] ? __lock_release+0x103/0x460 [ 56.479042][ T546] ? netconsole_netdev_event+0x2c1/0x620 [ 56.479187][ T546] ? __pfx___lock_release+0x10/0x10 [ 56.479333][ T546] blocking_notifier_call_chain+0x50/0x90 [ 56.479477][ T546] __netdev_upper_dev_unlink+0xd9/0x220 [ 56.479622][ T546] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 56.479801][ T546] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 56.479956][ T546] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 56.480135][ T546] ? rtnl_is_locked+0x15/0x20 [ 56.480281][ T546] netdev_upper_dev_unlink+0x71/0xa0 [ 56.480425][ T546] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 56.480602][ T546] ? netconsole_netdev_event+0x2c1/0x620 [ 56.480747][ T546] ? mutex_is_locked+0x1c/0x60 [ 56.480899][ T546] ? rtnl_is_locked+0x15/0x20 [ 56.481048][ T546] ? netdev_master_upper_dev_get+0x13/0x120 [ 56.481226][ T546] vrf_device_event+0x78/0xe0 [vrf] [ 56.481375][ T546] notifier_call_chain+0xcd/0x150 [ 56.481519][ T546] blocking_notifier_call_chain+0x66/0x90 [ 56.481665][ T546] unregister_netdevice_many_notify+0xa7b/0x1580 [ 56.481844][ T546] ? hlock_class+0x4e/0x130 [ 56.481987][ T546] ? mark_lock+0x38/0x3e0 [ 56.482102][ T546] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 56.482282][ T546] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.482462][ T546] ? kfree+0xf3/0x330 [ 56.482573][ T546] ? vlan_vid_del+0x310/0x5e0 [ 56.482721][ T546] ? vlan_vid_del+0x310/0x5e0 [ 56.482868][ T546] rtnl_dellink+0x348/0xa40 [ 56.483015][ T546] ? __pfx_rtnl_dellink+0x10/0x10 [ 56.483179][ T546] ? find_held_lock+0x2c/0x110 [ 56.483325][ T546] ? __lock_release+0x103/0x460 [ 56.483469][ T546] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 56.483615][ T546] ? __pfx___lock_release+0x10/0x10 [ 56.483761][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.483909][ T546] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 56.484051][ T546] ? __pfx_rtnl_dellink+0x10/0x10 [ 56.484202][ T546] rtnetlink_rcv_msg+0x712/0xc10 [ 56.484345][ T546] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 56.484490][ T546] ? hlock_class+0x4e/0x130 [ 56.484633][ T546] ? mark_lock+0x38/0x3e0 [ 56.484744][ T546] ? __lock_acquire+0xb9a/0x1680 [ 56.484891][ T546] netlink_rcv_skb+0x130/0x360 [ 56.485035][ T546] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 56.485179][ T546] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 56.485331][ T546] ? netlink_deliver_tap+0x13e/0x340 [ 56.485479][ T546] ? netlink_deliver_tap+0xc3/0x340 [ 56.485625][ T546] netlink_unicast+0x44b/0x710 [ 56.485769][ T546] ? __pfx_netlink_unicast+0x10/0x10 [ 56.485913][ T546] ? find_held_lock+0x2c/0x110 [ 56.486061][ T546] netlink_sendmsg+0x723/0xbe0 [ 56.486207][ T546] ? __pfx_netlink_sendmsg+0x10/0x10 [ 56.486360][ T546] ____sys_sendmsg+0x7ac/0xa10 [ 56.486505][ T546] ? __pfx_____sys_sendmsg+0x10/0x10 [ 56.486650][ T546] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 56.486833][ T546] ___sys_sendmsg+0xee/0x170 [ 56.486978][ T546] ? __pfx____sys_sendmsg+0x10/0x10 [ 56.487125][ T546] ? kasan_save_stack+0x34/0x50 [ 56.487271][ T546] ? kasan_save_stack+0x24/0x50 [ 56.487425][ T546] ? __kasan_record_aux_stack+0x8e/0xa0 [ 56.487571][ T546] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 56.487756][ T546] ? __x64_sys_close+0x7c/0xd0 [ 56.487900][ T546] ? do_syscall_64+0xc1/0x1d0 [ 56.488044][ T546] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.488224][ T546] ? __lock_acquire+0xb9a/0x1680 [ 56.488371][ T546] ? find_held_lock+0x2c/0x110 [ 56.488524][ T546] ? __lock_release+0x103/0x460 [ 56.488666][ T546] ? __virt_addr_valid+0x22b/0x430 [ 56.488811][ T546] ? __pfx___lock_release+0x10/0x10 [ 56.488956][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.489102][ T546] __sys_sendmsg+0x109/0x1a0 [ 56.489247][ T546] ? __pfx___sys_sendmsg+0x10/0x10 [ 56.489390][ T546] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.489580][ T546] do_syscall_64+0xc1/0x1d0 [ 56.489725][ T546] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.489906][ T546] RIP: 0033:0x7f6c6edba9a7 [ 56.490058][ T546] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 56.490566][ T546] RSP: 002b:00007ffdfe038708 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 56.490793][ T546] RAX: ffffffffffffffda RBX: 00007ffdfe038e30 RCX: 00007f6c6edba9a7 [ 56.491019][ T546] RDX: 0000000000000000 RSI: 00007ffdfe038770 RDI: 0000000000000005 [ 56.491242][ T546] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 56.491459][ T546] R10: 00007f6c6ec78ef8 R11: 0000000000000246 R12: 0000000000000002 [ 56.491682][ T546] R13: 00000000677953c0 R14: 0000000000498600 R15: 0000000000000000 [ 56.491903][ T546]