[ 12.826407][ T284] ip (284) used greatest stack depth: 24376 bytes left [ 16.422484][ T327] gre: GRE over IPv4 demultiplexor driver [ 16.445497][ T327] ip_gre: GRE over IPv4 tunneling driver [ 18.349648][ T350] 8021q: 802.1Q VLAN Support v1.8 [ 21.530661][ T388] GACT probability NOT on [ 1342.752275][T17313] [ 1342.752426][T17313] ============================================ [ 1342.752618][T17313] WARNING: possible recursive locking detected [ 1342.752801][T17313] 6.13.0-rc5-virtme #1 Not tainted [ 1342.752949][T17313] -------------------------------------------- [ 1342.753129][T17313] ip/17313 is trying to acquire lock: [ 1342.753276][T17313] ffffffffb55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1342.753587][T17313] [ 1342.753587][T17313] but task is already holding lock: [ 1342.753804][T17313] ffffffffb55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1342.754102][T17313] [ 1342.754102][T17313] other info that might help us debug this: [ 1342.754319][T17313] Possible unsafe locking scenario: [ 1342.754319][T17313] [ 1342.754531][T17313] CPU0 [ 1342.754644][T17313] ---- [ 1342.754754][T17313] lock((netdev_chain).rwsem); [ 1342.754898][T17313] lock((netdev_chain).rwsem); [ 1342.755044][T17313] [ 1342.755044][T17313] *** DEADLOCK *** [ 1342.755044][T17313] [ 1342.755263][T17313] May be due to missing lock nesting notation [ 1342.755263][T17313] [ 1342.755479][T17313] 2 locks held by ip/17313: [ 1342.755626][T17313] #0: ffffffffb55e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1342.755890][T17313] #1: ffffffffb55d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1342.756189][T17313] [ 1342.756189][T17313] stack backtrace: [ 1342.756369][T17313] CPU: 3 UID: 0 PID: 17313 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1342.756592][T17313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1342.756779][T17313] Call Trace: [ 1342.756892][T17313] [ 1342.756971][T17313] dump_stack_lvl+0x82/0xd0 [ 1342.757126][T17313] print_deadlock_bug+0x40a/0x650 [ 1342.757275][T17313] validate_chain+0x5bf/0xae0 [ 1342.757426][T17313] ? __pfx_validate_chain+0x10/0x10 [ 1342.757579][T17313] ? hlock_class+0x4e/0x130 [ 1342.757733][T17313] ? mark_lock+0x38/0x3e0 [ 1342.757847][T17313] __lock_acquire+0xb9a/0x1680 [ 1342.757995][T17313] lock_acquire.part.0+0xeb/0x330 [ 1342.758141][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1342.758323][T17313] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1342.758506][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1342.758654][T17313] ? trace_lock_acquire+0x14c/0x1f0 [ 1342.758806][T17313] ? lock_acquire+0x32/0xc0 [ 1342.758954][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1342.759134][T17313] down_read+0x9f/0x340 [ 1342.759245][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1342.759429][T17313] ? __pfx_down_read+0x10/0x10 [ 1342.759577][T17313] ? __lock_release+0x103/0x460 [ 1342.759729][T17313] ? netconsole_netdev_event+0x2c1/0x620 [ 1342.759877][T17313] ? __pfx___lock_release+0x10/0x10 [ 1342.760029][T17313] blocking_notifier_call_chain+0x50/0x90 [ 1342.760177][T17313] __netdev_upper_dev_unlink+0xd9/0x220 [ 1342.760323][T17313] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1342.760504][T17313] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1342.760652][T17313] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1342.760833][T17313] ? rtnl_is_locked+0x15/0x20 [ 1342.760985][T17313] netdev_upper_dev_unlink+0x71/0xa0 [ 1342.761131][T17313] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1342.761318][T17313] ? netconsole_netdev_event+0x2c1/0x620 [ 1342.761464][T17313] ? mutex_is_locked+0x1c/0x60 [ 1342.761617][T17313] ? rtnl_is_locked+0x15/0x20 [ 1342.761766][T17313] ? netdev_master_upper_dev_get+0x13/0x120 [ 1342.761948][T17313] vrf_device_event+0x78/0xe0 [vrf] [ 1342.762102][T17313] notifier_call_chain+0xcd/0x150 [ 1342.762252][T17313] blocking_notifier_call_chain+0x66/0x90 [ 1342.762400][T17313] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1342.762584][T17313] ? hlock_class+0x4e/0x130 [ 1342.762760][T17313] ? mark_lock+0x38/0x3e0 [ 1342.762872][T17313] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1342.763056][T17313] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1342.763250][T17313] ? kfree+0xf3/0x330 [ 1342.763361][T17313] ? vlan_vid_del+0x310/0x5e0 [ 1342.763509][T17313] ? vlan_vid_del+0x310/0x5e0 [ 1342.763660][T17313] rtnl_dellink+0x348/0xa40 [ 1342.763812][T17313] ? __pfx_rtnl_dellink+0x10/0x10 [ 1342.763975][T17313] ? find_held_lock+0x2c/0x110 [ 1342.764127][T17313] ? __lock_release+0x103/0x460 [ 1342.764276][T17313] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1342.764427][T17313] ? __pfx___lock_release+0x10/0x10 [ 1342.764572][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1342.764719][T17313] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1342.764874][T17313] ? __pfx_rtnl_dellink+0x10/0x10 [ 1342.765025][T17313] rtnetlink_rcv_msg+0x712/0xc10 [ 1342.765171][T17313] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1342.765322][T17313] ? hlock_class+0x4e/0x130 [ 1342.765469][T17313] ? mark_lock+0x38/0x3e0 [ 1342.765581][T17313] ? __lock_acquire+0xb9a/0x1680 [ 1342.765732][T17313] netlink_rcv_skb+0x130/0x360 [ 1342.765881][T17313] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1342.766028][T17313] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1342.766179][T17313] ? netlink_deliver_tap+0x13e/0x340 [ 1342.766329][T17313] ? netlink_deliver_tap+0xc3/0x340 [ 1342.766483][T17313] netlink_unicast+0x44b/0x710 [ 1342.766635][T17313] ? __pfx_netlink_unicast+0x10/0x10 [ 1342.766783][T17313] ? find_held_lock+0x2c/0x110 [ 1342.766931][T17313] netlink_sendmsg+0x723/0xbe0 [ 1342.767076][T17313] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1342.767225][T17313] ____sys_sendmsg+0x7ac/0xa10 [ 1342.767373][T17313] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1342.767522][T17313] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1342.767710][T17313] ___sys_sendmsg+0xee/0x170 [ 1342.767860][T17313] ? __pfx____sys_sendmsg+0x10/0x10 [ 1342.768006][T17313] ? kasan_save_stack+0x34/0x50 [ 1342.768152][T17313] ? kasan_save_stack+0x24/0x50 [ 1342.768297][T17313] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1342.768445][T17313] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1342.768634][T17313] ? __x64_sys_close+0x7c/0xd0 [ 1342.768781][T17313] ? do_syscall_64+0xc1/0x1d0 [ 1342.768929][T17313] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1342.769116][T17313] ? __lock_acquire+0xb9a/0x1680 [ 1342.769267][T17313] ? find_held_lock+0x2c/0x110 [ 1342.769415][T17313] ? __lock_release+0x103/0x460 [ 1342.769564][T17313] ? __virt_addr_valid+0x22b/0x430 [ 1342.769715][T17313] ? __pfx___lock_release+0x10/0x10 [ 1342.769861][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1342.770007][T17313] __sys_sendmsg+0x109/0x1a0 [ 1342.770155][T17313] ? __pfx___sys_sendmsg+0x10/0x10 [ 1342.770301][T17313] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1342.770489][T17313] do_syscall_64+0xc1/0x1d0 [ 1342.770635][T17313] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1342.770825][T17313] RIP: 0033:0x7fe44c3239a7 [ 1342.770982][T17313] 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 [ 1342.771496][T17313] RSP: 002b:00007ffed0182918 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1342.771723][T17313] RAX: ffffffffffffffda RBX: 00007ffed0183040 RCX: 00007fe44c3239a7 [ 1342.771956][T17313] RDX: 0000000000000000 RSI: 00007ffed0182980 RDI: 0000000000000005 [ 1342.772179][T17313] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1342.772399][T17313] R10: 00007fe44c1e1ef8 R11: 0000000000000246 R12: 0000000000000002 [ 1342.772622][T17313] R13: 0000000067792b08 R14: 0000000000498600 R15: 0000000000000000 [ 1342.772856][T17313] [ 1342.798268][T17313] ip (17313) used greatest stack depth: 23544 bytes left