[ 18.314390][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 18.796741][ T360] gre: GRE over IPv4 demultiplexor driver [ 18.853816][ T360] ip6_gre: GRE over IPv6 tunneling driver [ 29.047500][ T444] GACT probability NOT on [ 46.736439][ T657] [ 46.736638][ T657] ============================================ [ 46.736854][ T657] WARNING: possible recursive locking detected [ 46.737070][ T657] 6.13.0-rc5-virtme #1 Not tainted [ 46.737244][ T657] -------------------------------------------- [ 46.737454][ T657] ip/657 is trying to acquire lock: [ 46.737625][ T657] ffffffff991d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.738001][ T657] [ 46.738001][ T657] but task is already holding lock: [ 46.738253][ T657] ffffffff991d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.738591][ T657] [ 46.738591][ T657] other info that might help us debug this: [ 46.738843][ T657] Possible unsafe locking scenario: [ 46.738843][ T657] [ 46.739086][ T657] CPU0 [ 46.739242][ T657] ---- [ 46.739375][ T657] lock((netdev_chain).rwsem); [ 46.739544][ T657] lock((netdev_chain).rwsem); [ 46.739712][ T657] [ 46.739712][ T657] *** DEADLOCK *** [ 46.739712][ T657] [ 46.739954][ T657] May be due to missing lock nesting notation [ 46.739954][ T657] [ 46.740219][ T657] 2 locks held by ip/657: [ 46.740352][ T657] #0: ffffffff991e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.740670][ T657] #1: ffffffff991d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.741000][ T657] [ 46.741000][ T657] stack backtrace: [ 46.741210][ T657] CPU: 2 UID: 0 PID: 657 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.741458][ T657] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.741666][ T657] Call Trace: [ 46.741797][ T657] [ 46.741886][ T657] dump_stack_lvl+0x82/0xd0 [ 46.742074][ T657] print_deadlock_bug+0x40a/0x650 [ 46.742247][ T657] validate_chain+0x5bf/0xae0 [ 46.742416][ T657] ? __pfx_validate_chain+0x10/0x10 [ 46.742584][ T657] ? hlock_class+0x4e/0x130 [ 46.742750][ T657] ? mark_lock+0x38/0x3e0 [ 46.742879][ T657] __lock_acquire+0xb9a/0x1680 [ 46.743051][ T657] lock_acquire.part.0+0xeb/0x330 [ 46.743251][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.743460][ T657] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.743672][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.743839][ T657] ? trace_lock_acquire+0x14c/0x1f0 [ 46.744008][ T657] ? lock_acquire+0x32/0xc0 [ 46.744172][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.744387][ T657] down_read+0x9f/0x340 [ 46.744516][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.744723][ T657] ? __pfx_down_read+0x10/0x10 [ 46.744889][ T657] ? __lock_release+0x103/0x460 [ 46.745051][ T657] ? netconsole_netdev_event+0x2c1/0x620 [ 46.745217][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.745383][ T657] blocking_notifier_call_chain+0x50/0x90 [ 46.745553][ T657] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.745716][ T657] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.745926][ T657] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.746112][ T657] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.746302][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.746456][ T657] netdev_upper_dev_unlink+0x71/0xa0 [ 46.746612][ T657] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.746801][ T657] ? netconsole_netdev_event+0x2c1/0x620 [ 46.746985][ T657] ? mutex_is_locked+0x1c/0x60 [ 46.747212][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.747446][ T657] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.747694][ T657] vrf_device_event+0x78/0xe0 [vrf] [ 46.747879][ T657] notifier_call_chain+0xcd/0x150 [ 46.748132][ T657] blocking_notifier_call_chain+0x66/0x90 [ 46.748354][ T657] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.748602][ T657] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.748895][ T657] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 46.749132][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.749371][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.749616][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.749852][ T657] ? unregister_netdevice_queue+0x70/0x410 [ 46.750139][ T657] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 46.750437][ T657] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 46.750659][ T657] rtnl_dellink+0x348/0xa40 [ 46.750890][ T657] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.751137][ T657] ? find_held_lock+0x2c/0x110 [ 46.751394][ T657] ? __lock_release+0x103/0x460 [ 46.751636][ T657] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.751877][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.752121][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.752365][ T657] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.752592][ T657] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.752823][ T657] rtnetlink_rcv_msg+0x712/0xc10 [ 46.753076][ T657] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.753305][ T657] ? hlock_class+0x4e/0x130 [ 46.753544][ T657] ? mark_lock+0x38/0x3e0 [ 46.753726][ T657] ? __lock_acquire+0xb9a/0x1680 [ 46.753972][ T657] netlink_rcv_skb+0x130/0x360 [ 46.754211][ T657] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.754457][ T657] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.754704][ T657] ? netlink_deliver_tap+0x13e/0x340 [ 46.754954][ T657] ? netlink_deliver_tap+0xc3/0x340 [ 46.755196][ T657] netlink_unicast+0x44b/0x710 [ 46.755430][ T657] ? __pfx_netlink_unicast+0x10/0x10 [ 46.755659][ T657] ? find_held_lock+0x2c/0x110 [ 46.755906][ T657] netlink_sendmsg+0x723/0xbe0 [ 46.756143][ T657] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.756387][ T657] ____sys_sendmsg+0x7ac/0xa10 [ 46.756642][ T657] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.756881][ T657] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.757188][ T657] ___sys_sendmsg+0xee/0x170 [ 46.757414][ T657] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.757640][ T657] ? kasan_save_stack+0x34/0x50 [ 46.757846][ T657] ? kasan_save_stack+0x24/0x50 [ 46.758076][ T657] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.758316][ T657] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.758614][ T657] ? __x64_sys_close+0x7c/0xd0 [ 46.758851][ T657] ? do_syscall_64+0xc1/0x1d0 [ 46.759090][ T657] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.759391][ T657] ? __lock_acquire+0xb9a/0x1680 [ 46.759634][ T657] ? find_held_lock+0x2c/0x110 [ 46.759845][ T657] ? __lock_release+0x103/0x460 [ 46.760066][ T657] ? __virt_addr_valid+0x22b/0x430 [ 46.760302][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.760534][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.760782][ T657] __sys_sendmsg+0x109/0x1a0 [ 46.761027][ T657] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.761263][ T657] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.761563][ T657] do_syscall_64+0xc1/0x1d0 [ 46.761738][ T657] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.762047][ T657] RIP: 0033:0x7f4305ebf9a7 [ 46.762300][ T657] 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 [ 46.763093][ T657] RSP: 002b:00007fff3902d638 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.763461][ T657] RAX: ffffffffffffffda RBX: 00007fff3902dd60 RCX: 00007f4305ebf9a7 [ 46.763816][ T657] RDX: 0000000000000000 RSI: 00007fff3902d6a0 RDI: 0000000000000005 [ 46.764167][ T657] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.764532][ T657] R10: 00007f4305d7def8 R11: 0000000000000246 R12: 0000000000000002 [ 46.764798][ T657] R13: 00000000677953ef R14: 0000000000498600 R15: 0000000000000000 [ 46.765029][ T657]