[ 11.097290][ T249] ip (249) used greatest stack depth: 24432 bytes left [ 15.982882][ T327] gre: GRE over IPv4 demultiplexor driver [ 16.032972][ T327] ip6_gre: GRE over IPv6 tunneling driver [ 17.665504][ T350] 8021q: 802.1Q VLAN Support v1.8 [ 20.686465][ T388] GACT probability NOT on [ 1154.015744][T17309] [ 1154.015862][T17309] ============================================ [ 1154.016054][T17309] WARNING: possible recursive locking detected [ 1154.016242][T17309] 6.13.0-rc5-virtme #1 Not tainted [ 1154.016391][T17309] -------------------------------------------- [ 1154.016577][T17309] ip/17309 is trying to acquire lock: [ 1154.016719][T17309] ffffffff8ddd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1154.017029][T17309] [ 1154.017029][T17309] but task is already holding lock: [ 1154.017239][T17309] ffffffff8ddd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1154.017535][T17309] [ 1154.017535][T17309] other info that might help us debug this: [ 1154.017746][T17309] Possible unsafe locking scenario: [ 1154.017746][T17309] [ 1154.017966][T17309] CPU0 [ 1154.018078][T17309] ---- [ 1154.018187][T17309] lock((netdev_chain).rwsem); [ 1154.018333][T17309] lock((netdev_chain).rwsem); [ 1154.018478][T17309] [ 1154.018478][T17309] *** DEADLOCK *** [ 1154.018478][T17309] [ 1154.018693][T17309] May be due to missing lock nesting notation [ 1154.018693][T17309] [ 1154.018910][T17309] 2 locks held by ip/17309: [ 1154.019062][T17309] #0: ffffffff8dde7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1154.019337][T17309] #1: ffffffff8ddd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1154.019633][T17309] [ 1154.019633][T17309] stack backtrace: [ 1154.019816][T17309] CPU: 3 UID: 0 PID: 17309 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1154.020037][T17309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1154.020227][T17309] Call Trace: [ 1154.020340][T17309] [ 1154.020417][T17309] dump_stack_lvl+0x82/0xd0 [ 1154.020569][T17309] print_deadlock_bug+0x40a/0x650 [ 1154.020716][T17309] validate_chain+0x5bf/0xae0 [ 1154.020864][T17309] ? __pfx_validate_chain+0x10/0x10 [ 1154.021013][T17309] ? hlock_class+0x4e/0x130 [ 1154.021160][T17309] ? mark_lock+0x38/0x3e0 [ 1154.021276][T17309] __lock_acquire+0xb9a/0x1680 [ 1154.021424][T17309] lock_acquire.part.0+0xeb/0x330 [ 1154.021570][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1154.021751][T17309] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1154.021939][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1154.022085][T17309] ? trace_lock_acquire+0x14c/0x1f0 [ 1154.022232][T17309] ? lock_acquire+0x32/0xc0 [ 1154.022382][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1154.022565][T17309] down_read+0x9f/0x340 [ 1154.022675][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1154.022865][T17309] ? __pfx_down_read+0x10/0x10 [ 1154.023010][T17309] ? __lock_release+0x103/0x460 [ 1154.023159][T17309] ? netconsole_netdev_event+0x2c1/0x620 [ 1154.023311][T17309] ? __pfx___lock_release+0x10/0x10 [ 1154.023461][T17309] blocking_notifier_call_chain+0x50/0x90 [ 1154.023613][T17309] __netdev_upper_dev_unlink+0xd9/0x220 [ 1154.023761][T17309] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1154.023948][T17309] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1154.024095][T17309] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1154.024278][T17309] ? rtnl_is_locked+0x15/0x20 [ 1154.024426][T17309] netdev_upper_dev_unlink+0x71/0xa0 [ 1154.024576][T17309] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1154.024756][T17309] ? netconsole_netdev_event+0x2c1/0x620 [ 1154.024905][T17309] ? mutex_is_locked+0x1c/0x60 [ 1154.025055][T17309] ? rtnl_is_locked+0x15/0x20 [ 1154.025203][T17309] ? netdev_master_upper_dev_get+0x13/0x120 [ 1154.025387][T17309] vrf_device_event+0x78/0xe0 [vrf] [ 1154.025542][T17309] notifier_call_chain+0xcd/0x150 [ 1154.025689][T17309] blocking_notifier_call_chain+0x66/0x90 [ 1154.025840][T17309] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1154.026024][T17309] ? hlock_class+0x4e/0x130 [ 1154.026171][T17309] ? mark_lock+0x38/0x3e0 [ 1154.026281][T17309] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1154.026464][T17309] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1154.026653][T17309] ? kfree+0xf3/0x330 [ 1154.026765][T17309] ? vlan_vid_del+0x310/0x5e0 [ 1154.026914][T17309] ? vlan_vid_del+0x310/0x5e0 [ 1154.027070][T17309] rtnl_dellink+0x348/0xa40 [ 1154.027220][T17309] ? __pfx_rtnl_dellink+0x10/0x10 [ 1154.027380][T17309] ? find_held_lock+0x2c/0x110 [ 1154.027531][T17309] ? __lock_release+0x103/0x460 [ 1154.027678][T17309] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1154.027829][T17309] ? __pfx___lock_release+0x10/0x10 [ 1154.027975][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1154.028127][T17309] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1154.028273][T17309] ? __pfx_rtnl_dellink+0x10/0x10 [ 1154.028423][T17309] rtnetlink_rcv_msg+0x712/0xc10 [ 1154.028569][T17309] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1154.028715][T17309] ? hlock_class+0x4e/0x130 [ 1154.028870][T17309] ? mark_lock+0x38/0x3e0 [ 1154.028982][T17309] ? __lock_acquire+0xb9a/0x1680 [ 1154.029131][T17309] netlink_rcv_skb+0x130/0x360 [ 1154.029277][T17309] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1154.029425][T17309] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1154.029575][T17309] ? netlink_deliver_tap+0x13e/0x340 [ 1154.029727][T17309] ? netlink_deliver_tap+0xc3/0x340 [ 1154.029881][T17309] netlink_unicast+0x44b/0x710 [ 1154.030028][T17309] ? __pfx_netlink_unicast+0x10/0x10 [ 1154.030177][T17309] ? find_held_lock+0x2c/0x110 [ 1154.030329][T17309] netlink_sendmsg+0x723/0xbe0 [ 1154.030478][T17309] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1154.030628][T17309] ____sys_sendmsg+0x7ac/0xa10 [ 1154.030775][T17309] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1154.030929][T17309] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1154.031120][T17309] ___sys_sendmsg+0xee/0x170 [ 1154.031269][T17309] ? __pfx____sys_sendmsg+0x10/0x10 [ 1154.031415][T17309] ? kasan_save_stack+0x34/0x50 [ 1154.031564][T17309] ? kasan_save_stack+0x24/0x50 [ 1154.031711][T17309] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1154.031860][T17309] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1154.032047][T17309] ? __x64_sys_close+0x7c/0xd0 [ 1154.032193][T17309] ? do_syscall_64+0xc1/0x1d0 [ 1154.032342][T17309] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1154.032533][T17309] ? __lock_acquire+0xb9a/0x1680 [ 1154.032680][T17309] ? find_held_lock+0x2c/0x110 [ 1154.032827][T17309] ? __lock_release+0x103/0x460 [ 1154.032978][T17309] ? __virt_addr_valid+0x22b/0x430 [ 1154.033126][T17309] ? __pfx___lock_release+0x10/0x10 [ 1154.033277][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1154.033426][T17309] __sys_sendmsg+0x109/0x1a0 [ 1154.033575][T17309] ? __pfx___sys_sendmsg+0x10/0x10 [ 1154.033720][T17309] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1154.033904][T17309] do_syscall_64+0xc1/0x1d0 [ 1154.034054][T17309] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1154.034232][T17309] RIP: 0033:0x7f20dd21b9a7 [ 1154.034389][T17309] 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 [ 1154.034898][T17309] RSP: 002b:00007ffe5d8ff698 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1154.035122][T17309] RAX: ffffffffffffffda RBX: 00007ffe5d8ffdc0 RCX: 00007f20dd21b9a7 [ 1154.035351][T17309] RDX: 0000000000000000 RSI: 00007ffe5d8ff700 RDI: 0000000000000005 [ 1154.035572][T17309] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1154.035792][T17309] R10: 00007f20dd0d9ef8 R11: 0000000000000246 R12: 0000000000000002 [ 1154.036020][T17309] R13: 00000000677932c0 R14: 0000000000498600 R15: 0000000000000000 [ 1154.036250][T17309] [ 1154.054542][T17309] ip (17309) used greatest stack depth: 23832 bytes left