[ 16.209113][ T335] 8021q: 802.1Q VLAN Support v1.8 [ 16.556948][ T340] gre: GRE over IPv4 demultiplexor driver [ 16.600362][ T340] ip6_gre: GRE over IPv6 tunneling driver [ 16.780870][ T344] ip (344) used greatest stack depth: 23352 bytes left [ 26.028626][ T416] GACT probability NOT on [ 43.433647][ T633] [ 43.433809][ T633] ============================================ [ 43.434023][ T633] WARNING: possible recursive locking detected [ 43.434203][ T633] 6.13.0-rc5-virtme #1 Not tainted [ 43.434350][ T633] -------------------------------------------- [ 43.434533][ T633] ip/633 is trying to acquire lock: [ 43.434679][ T633] ffffffffb0dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.434988][ T633] [ 43.434988][ T633] but task is already holding lock: [ 43.435212][ T633] ffffffffb0dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.435521][ T633] [ 43.435521][ T633] other info that might help us debug this: [ 43.435748][ T633] Possible unsafe locking scenario: [ 43.435748][ T633] [ 43.435989][ T633] CPU0 [ 43.436109][ T633] ---- [ 43.436232][ T633] lock((netdev_chain).rwsem); [ 43.436381][ T633] lock((netdev_chain).rwsem); [ 43.436534][ T633] [ 43.436534][ T633] *** DEADLOCK *** [ 43.436534][ T633] [ 43.436745][ T633] May be due to missing lock nesting notation [ 43.436745][ T633] [ 43.436959][ T633] 2 locks held by ip/633: [ 43.437089][ T633] #0: ffffffffb0de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.437357][ T633] #1: ffffffffb0dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.437671][ T633] [ 43.437671][ T633] stack backtrace: [ 43.437850][ T633] CPU: 2 UID: 0 PID: 633 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.438076][ T633] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.438261][ T633] Call Trace: [ 43.438373][ T633] [ 43.438451][ T633] dump_stack_lvl+0x82/0xd0 [ 43.438604][ T633] print_deadlock_bug+0x40a/0x650 [ 43.438769][ T633] validate_chain+0x5bf/0xae0 [ 43.438920][ T633] ? __pfx_validate_chain+0x10/0x10 [ 43.439091][ T633] ? hlock_class+0x4e/0x130 [ 43.439247][ T633] ? mark_lock+0x38/0x3e0 [ 43.439363][ T633] __lock_acquire+0xb9a/0x1680 [ 43.439514][ T633] lock_acquire.part.0+0xeb/0x330 [ 43.439659][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 43.439852][ T633] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.440046][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.440193][ T633] ? trace_lock_acquire+0x14c/0x1f0 [ 43.440348][ T633] ? lock_acquire+0x32/0xc0 [ 43.440496][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 43.440694][ T633] down_read+0x9f/0x340 [ 43.440807][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 43.440995][ T633] ? __pfx_down_read+0x10/0x10 [ 43.441162][ T633] ? __lock_release+0x103/0x460 [ 43.441321][ T633] ? netconsole_netdev_event+0x2c1/0x620 [ 43.441468][ T633] ? __pfx___lock_release+0x10/0x10 [ 43.441614][ T633] blocking_notifier_call_chain+0x50/0x90 [ 43.441776][ T633] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.441923][ T633] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.442109][ T633] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.442266][ T633] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.442467][ T633] ? rtnl_is_locked+0x15/0x20 [ 43.442616][ T633] netdev_upper_dev_unlink+0x71/0xa0 [ 43.442764][ T633] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.442967][ T633] ? netconsole_netdev_event+0x2c1/0x620 [ 43.443115][ T633] ? mutex_is_locked+0x1c/0x60 [ 43.443264][ T633] ? rtnl_is_locked+0x15/0x20 [ 43.443416][ T633] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.443604][ T633] vrf_device_event+0x78/0xe0 [vrf] [ 43.443764][ T633] notifier_call_chain+0xcd/0x150 [ 43.443914][ T633] blocking_notifier_call_chain+0x66/0x90 [ 43.444068][ T633] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.444263][ T633] ? __lock_release+0x103/0x460 [ 43.444411][ T633] ? __pfx___lock_release+0x10/0x10 [ 43.444567][ T633] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.444759][ T633] ? hlock_class+0x4e/0x130 [ 43.444933][ T633] ? mark_held_locks+0x9e/0xe0 [ 43.445092][ T633] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 43.445240][ T633] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 43.445425][ T633] rtnl_dellink+0x348/0xa40 [ 43.445574][ T633] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.445748][ T633] ? find_held_lock+0x2c/0x110 [ 43.445905][ T633] ? __lock_release+0x103/0x460 [ 43.446067][ T633] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.446217][ T633] ? __pfx___lock_release+0x10/0x10 [ 43.446374][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.446524][ T633] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.446671][ T633] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.446828][ T633] rtnetlink_rcv_msg+0x712/0xc10 [ 43.446978][ T633] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.447123][ T633] ? hlock_class+0x4e/0x130 [ 43.447287][ T633] ? mark_lock+0x38/0x3e0 [ 43.447400][ T633] ? __lock_acquire+0xb9a/0x1680 [ 43.447546][ T633] netlink_rcv_skb+0x130/0x360 [ 43.447691][ T633] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.447846][ T633] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.448022][ T633] ? netlink_deliver_tap+0x13e/0x340 [ 43.448185][ T633] ? netlink_deliver_tap+0xc3/0x340 [ 43.448336][ T633] netlink_unicast+0x44b/0x710 [ 43.448484][ T633] ? __pfx_netlink_unicast+0x10/0x10 [ 43.448631][ T633] ? find_held_lock+0x2c/0x110 [ 43.448779][ T633] netlink_sendmsg+0x723/0xbe0 [ 43.448925][ T633] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.449083][ T633] ____sys_sendmsg+0x7ac/0xa10 [ 43.449246][ T633] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.449396][ T633] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.449587][ T633] ___sys_sendmsg+0xee/0x170 [ 43.449736][ T633] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.449883][ T633] ? kasan_save_stack+0x34/0x50 [ 43.450033][ T633] ? kasan_save_stack+0x24/0x50 [ 43.450177][ T633] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.450323][ T633] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.450504][ T633] ? __x64_sys_close+0x7c/0xd0 [ 43.450653][ T633] ? do_syscall_64+0xc1/0x1d0 [ 43.450798][ T633] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.450981][ T633] ? __lock_acquire+0xb9a/0x1680 [ 43.451130][ T633] ? find_held_lock+0x2c/0x110 [ 43.451279][ T633] ? __lock_release+0x103/0x460 [ 43.451426][ T633] ? __virt_addr_valid+0x22b/0x430 [ 43.451588][ T633] ? __pfx___lock_release+0x10/0x10 [ 43.451740][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.451905][ T633] __sys_sendmsg+0x109/0x1a0 [ 43.452057][ T633] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.452205][ T633] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.452393][ T633] do_syscall_64+0xc1/0x1d0 [ 43.452538][ T633] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.452720][ T633] RIP: 0033:0x7f089212c9a7 [ 43.452876][ T633] 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 [ 43.453391][ T633] RSP: 002b:00007ffe44ba6218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.453612][ T633] RAX: ffffffffffffffda RBX: 00007ffe44ba6940 RCX: 00007f089212c9a7 [ 43.453838][ T633] RDX: 0000000000000000 RSI: 00007ffe44ba6280 RDI: 0000000000000005 [ 43.454061][ T633] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.454279][ T633] R10: 00007f0891feaef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.454498][ T633] R13: 0000000067792eea R14: 0000000000498600 R15: 0000000000000000 [ 43.454723][ T633]