[ 14.300792][ T313] 8021q: 802.1Q VLAN Support v1.8 [ 14.659146][ T318] gre: GRE over IPv4 demultiplexor driver [ 14.672536][ T318] ip_gre: GRE over IPv4 tunneling driver [ 32.074407][ T416] [ 32.074570][ T416] ============================================ [ 32.074767][ T416] WARNING: possible recursive locking detected [ 32.074972][ T416] 6.13.0-rc5-virtme #1 Not tainted [ 32.075125][ T416] -------------------------------------------- [ 32.075307][ T416] ip/416 is trying to acquire lock: [ 32.075457][ T416] ffffffffb0fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.075759][ T416] [ 32.075759][ T416] but task is already holding lock: [ 32.075974][ T416] ffffffffb0fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.076291][ T416] [ 32.076291][ T416] other info that might help us debug this: [ 32.076519][ T416] Possible unsafe locking scenario: [ 32.076519][ T416] [ 32.076739][ T416] CPU0 [ 32.076861][ T416] ---- [ 32.076968][ T416] lock((netdev_chain).rwsem); [ 32.077119][ T416] lock((netdev_chain).rwsem); [ 32.077270][ T416] [ 32.077270][ T416] *** DEADLOCK *** [ 32.077270][ T416] [ 32.077519][ T416] May be due to missing lock nesting notation [ 32.077519][ T416] [ 32.077750][ T416] 2 locks held by ip/416: [ 32.077862][ T416] #0: ffffffffb0fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.078127][ T416] #1: ffffffffb0fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.078431][ T416] [ 32.078431][ T416] stack backtrace: [ 32.078611][ T416] CPU: 0 UID: 0 PID: 416 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.078870][ T416] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.079058][ T416] Call Trace: [ 32.079172][ T416] [ 32.079252][ T416] dump_stack_lvl+0x82/0xd0 [ 32.079411][ T416] print_deadlock_bug+0x40a/0x650 [ 32.079565][ T416] validate_chain+0x5bf/0xae0 [ 32.079715][ T416] ? __pfx_validate_chain+0x10/0x10 [ 32.079868][ T416] ? hlock_class+0x4e/0x130 [ 32.080021][ T416] ? mark_lock+0x38/0x3e0 [ 32.080137][ T416] __lock_acquire+0xb9a/0x1680 [ 32.080287][ T416] lock_acquire.part.0+0xeb/0x330 [ 32.080436][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.080621][ T416] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.080830][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.081046][ T416] ? trace_lock_acquire+0x14c/0x1f0 [ 32.081285][ T416] ? lock_acquire+0x32/0xc0 [ 32.081517][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.081805][ T416] down_read+0x9f/0x340 [ 32.081983][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.082271][ T416] ? __pfx_down_read+0x10/0x10 [ 32.082503][ T416] ? __lock_release+0x103/0x460 [ 32.082714][ T416] ? netconsole_netdev_event+0x2c1/0x620 [ 32.082950][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.083180][ T416] blocking_notifier_call_chain+0x50/0x90 [ 32.083415][ T416] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.083734][ T416] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.084026][ T416] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.084258][ T416] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.084550][ T416] ? rtnl_is_locked+0x15/0x20 [ 32.084788][ T416] netdev_upper_dev_unlink+0x71/0xa0 [ 32.084992][ T416] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.085264][ T416] ? netconsole_netdev_event+0x2c1/0x620 [ 32.085483][ T416] ? mutex_is_locked+0x1c/0x60 [ 32.085719][ T416] ? rtnl_is_locked+0x15/0x20 [ 32.085948][ T416] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.086232][ T416] vrf_device_event+0x78/0xe0 [vrf] [ 32.086481][ T416] notifier_call_chain+0xcd/0x150 [ 32.086710][ T416] blocking_notifier_call_chain+0x66/0x90 [ 32.086939][ T416] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.087231][ T416] ? __lock_release+0x103/0x460 [ 32.087460][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.087692][ T416] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.087988][ T416] ? hlock_class+0x4e/0x130 [ 32.088224][ T416] ? mark_held_locks+0x9e/0xe0 [ 32.088456][ T416] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.088686][ T416] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.088981][ T416] rtnl_dellink+0x348/0xa40 [ 32.089219][ T416] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.089481][ T416] ? find_held_lock+0x2c/0x110 [ 32.089716][ T416] ? __lock_release+0x103/0x460 [ 32.089954][ T416] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.090183][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.090412][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.090649][ T416] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.090875][ T416] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.091104][ T416] rtnetlink_rcv_msg+0x712/0xc10 [ 32.091332][ T416] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.091574][ T416] ? hlock_class+0x4e/0x130 [ 32.091801][ T416] ? mark_lock+0x38/0x3e0 [ 32.091986][ T416] ? __lock_acquire+0xb9a/0x1680 [ 32.092226][ T416] netlink_rcv_skb+0x130/0x360 [ 32.092458][ T416] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.092690][ T416] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.092927][ T416] ? netlink_deliver_tap+0x13e/0x340 [ 32.093172][ T416] ? netlink_deliver_tap+0xc3/0x340 [ 32.093407][ T416] netlink_unicast+0x44b/0x710 [ 32.093636][ T416] ? __pfx_netlink_unicast+0x10/0x10 [ 32.093869][ T416] ? find_held_lock+0x2c/0x110 [ 32.094105][ T416] netlink_sendmsg+0x723/0xbe0 [ 32.094337][ T416] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.094569][ T416] ____sys_sendmsg+0x7ac/0xa10 [ 32.094812][ T416] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.095042][ T416] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.095330][ T416] ___sys_sendmsg+0xee/0x170 [ 32.095575][ T416] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.095816][ T416] ? kasan_save_stack+0x34/0x50 [ 32.096052][ T416] ? kasan_save_stack+0x24/0x50 [ 32.096302][ T416] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.096554][ T416] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.096864][ T416] ? __x64_sys_close+0x7c/0xd0 [ 32.097080][ T416] ? do_syscall_64+0xc1/0x1d0 [ 32.097314][ T416] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.097602][ T416] ? __lock_acquire+0xb9a/0x1680 [ 32.097832][ T416] ? find_held_lock+0x2c/0x110 [ 32.098068][ T416] ? __lock_release+0x103/0x460 [ 32.098298][ T416] ? __virt_addr_valid+0x22b/0x430 [ 32.098544][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.098773][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.099008][ T416] __sys_sendmsg+0x109/0x1a0 [ 32.099240][ T416] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.099494][ T416] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.099789][ T416] do_syscall_64+0xc1/0x1d0 [ 32.100027][ T416] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.100326][ T416] RIP: 0033:0x7fcfdff7a9a7 [ 32.100571][ T416] 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 [ 32.101384][ T416] RSP: 002b:00007ffc137bd718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.101739][ T416] RAX: ffffffffffffffda RBX: 00007ffc137bde40 RCX: 00007fcfdff7a9a7 [ 32.102084][ T416] RDX: 0000000000000000 RSI: 00007ffc137bd780 RDI: 0000000000000005 [ 32.102433][ T416] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.102764][ T416] R10: 00007fcfdfe38ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.103121][ T416] R13: 0000000067792f6a R14: 0000000000498600 R15: 0000000000000000 [ 32.103482][ T416]