[ 14.575052][ T310] 8021q: 802.1Q VLAN Support v1.8 [ 15.418775][ T321] gre: GRE over IPv4 demultiplexor driver [ 15.440219][ T321] ip_gre: GRE over IPv4 tunneling driver [ 15.805019][ T327] ip (327) used greatest stack depth: 23784 bytes left [ 20.380486][ T387] GACT probability NOT on [ 83.979317][ T680] [ 83.979560][ T680] ============================================ [ 83.979754][ T680] WARNING: possible recursive locking detected [ 83.979949][ T680] 6.13.0-rc5-virtme #1 Not tainted [ 83.980096][ T680] -------------------------------------------- [ 83.980274][ T680] ip/680 is trying to acquire lock: [ 83.980418][ T680] ffffffff9cfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 83.980733][ T680] [ 83.980733][ T680] but task is already holding lock: [ 83.980948][ T680] ffffffff9cfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 83.981242][ T680] [ 83.981242][ T680] other info that might help us debug this: [ 83.981454][ T680] Possible unsafe locking scenario: [ 83.981454][ T680] [ 83.981665][ T680] CPU0 [ 83.981780][ T680] ---- [ 83.981887][ T680] lock((netdev_chain).rwsem); [ 83.982038][ T680] lock((netdev_chain).rwsem); [ 83.982184][ T680] [ 83.982184][ T680] *** DEADLOCK *** [ 83.982184][ T680] [ 83.982403][ T680] May be due to missing lock nesting notation [ 83.982403][ T680] [ 83.982617][ T680] 2 locks held by ip/680: [ 83.982727][ T680] #0: ffffffff9cfe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 83.982994][ T680] #1: ffffffff9cfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 83.983285][ T680] [ 83.983285][ T680] stack backtrace: [ 83.983460][ T680] CPU: 0 UID: 0 PID: 680 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 83.983676][ T680] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 83.983860][ T680] Call Trace: [ 83.983970][ T680] [ 83.984046][ T680] dump_stack_lvl+0x82/0xd0 [ 83.984198][ T680] print_deadlock_bug+0x40a/0x650 [ 83.984349][ T680] validate_chain+0x5bf/0xae0 [ 83.984497][ T680] ? __pfx_validate_chain+0x10/0x10 [ 83.984644][ T680] ? hlock_class+0x4e/0x130 [ 83.984789][ T680] ? mark_lock+0x38/0x3e0 [ 83.984901][ T680] __lock_acquire+0xb9a/0x1680 [ 83.985053][ T680] lock_acquire.part.0+0xeb/0x330 [ 83.985197][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 83.985378][ T680] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 83.985562][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 83.985706][ T680] ? trace_lock_acquire+0x14c/0x1f0 [ 83.985855][ T680] ? lock_acquire+0x32/0xc0 [ 83.986000][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 83.986191][ T680] down_read+0x9f/0x340 [ 83.986304][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 83.986486][ T680] ? __pfx_down_read+0x10/0x10 [ 83.986630][ T680] ? __lock_release+0x103/0x460 [ 83.986775][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 83.986920][ T680] ? __pfx___lock_release+0x10/0x10 [ 83.987068][ T680] blocking_notifier_call_chain+0x50/0x90 [ 83.987218][ T680] __netdev_upper_dev_unlink+0xd9/0x220 [ 83.987363][ T680] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 83.987543][ T680] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 83.987690][ T680] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 83.987870][ T680] ? rtnl_is_locked+0x15/0x20 [ 83.988016][ T680] netdev_upper_dev_unlink+0x71/0xa0 [ 83.988166][ T680] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 83.988350][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 83.988500][ T680] ? mutex_is_locked+0x1c/0x60 [ 83.988645][ T680] ? rtnl_is_locked+0x15/0x20 [ 83.988790][ T680] ? netdev_master_upper_dev_get+0x13/0x120 [ 83.988970][ T680] vrf_device_event+0x78/0xe0 [vrf] [ 83.989120][ T680] notifier_call_chain+0xcd/0x150 [ 83.989270][ T680] blocking_notifier_call_chain+0x66/0x90 [ 83.989419][ T680] unregister_netdevice_many_notify+0xa7b/0x1580 [ 83.989601][ T680] ? hlock_class+0x4e/0x130 [ 83.989745][ T680] ? mark_lock+0x38/0x3e0 [ 83.989856][ T680] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 83.990045][ T680] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 83.990227][ T680] ? kfree+0xf3/0x330 [ 83.990343][ T680] ? vlan_vid_del+0x310/0x5e0 [ 83.990493][ T680] ? vlan_vid_del+0x310/0x5e0 [ 83.990640][ T680] rtnl_dellink+0x348/0xa40 [ 83.990786][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 83.990945][ T680] ? find_held_lock+0x2c/0x110 [ 83.991092][ T680] ? __lock_release+0x103/0x460 [ 83.991238][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 83.991383][ T680] ? __pfx___lock_release+0x10/0x10 [ 83.991534][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 83.991682][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 83.991828][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 83.991972][ T680] rtnetlink_rcv_msg+0x712/0xc10 [ 83.992116][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 83.992260][ T680] ? hlock_class+0x4e/0x130 [ 83.992406][ T680] ? mark_lock+0x38/0x3e0 [ 83.992522][ T680] ? __lock_acquire+0xb9a/0x1680 [ 83.992667][ T680] netlink_rcv_skb+0x130/0x360 [ 83.992813][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 83.992960][ T680] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 83.993108][ T680] ? netlink_deliver_tap+0x13e/0x340 [ 83.993256][ T680] ? netlink_deliver_tap+0xc3/0x340 [ 83.993401][ T680] netlink_unicast+0x44b/0x710 [ 83.993553][ T680] ? __pfx_netlink_unicast+0x10/0x10 [ 83.993698][ T680] ? find_held_lock+0x2c/0x110 [ 83.993845][ T680] netlink_sendmsg+0x723/0xbe0 [ 83.993990][ T680] ? __pfx_netlink_sendmsg+0x10/0x10 [ 83.994139][ T680] ____sys_sendmsg+0x7ac/0xa10 [ 83.994285][ T680] ? __pfx_____sys_sendmsg+0x10/0x10 [ 83.994428][ T680] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 83.994616][ T680] ___sys_sendmsg+0xee/0x170 [ 83.994764][ T680] ? __pfx____sys_sendmsg+0x10/0x10 [ 83.994910][ T680] ? kasan_save_stack+0x34/0x50 [ 83.995055][ T680] ? kasan_save_stack+0x24/0x50 [ 83.995199][ T680] ? __kasan_record_aux_stack+0x8e/0xa0 [ 83.995346][ T680] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 83.995528][ T680] ? __x64_sys_close+0x7c/0xd0 [ 83.995679][ T680] ? do_syscall_64+0xc1/0x1d0 [ 83.995825][ T680] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.996007][ T680] ? __lock_acquire+0xb9a/0x1680 [ 83.996154][ T680] ? find_held_lock+0x2c/0x110 [ 83.996300][ T680] ? __lock_release+0x103/0x460 [ 83.996447][ T680] ? __virt_addr_valid+0x22b/0x430 [ 83.996596][ T680] ? __pfx___lock_release+0x10/0x10 [ 83.996745][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 83.996893][ T680] __sys_sendmsg+0x109/0x1a0 [ 83.997040][ T680] ? __pfx___sys_sendmsg+0x10/0x10 [ 83.997186][ T680] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 83.997370][ T680] do_syscall_64+0xc1/0x1d0 [ 83.997516][ T680] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.997697][ T680] RIP: 0033:0x7f56677aa9a7 [ 83.997852][ T680] 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 [ 83.998359][ T680] RSP: 002b:00007ffec4195898 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 83.998578][ T680] RAX: ffffffffffffffda RBX: 00007ffec4195fc0 RCX: 00007f56677aa9a7 [ 83.998808][ T680] RDX: 0000000000000000 RSI: 00007ffec4195900 RDI: 0000000000000005 [ 83.999023][ T680] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 83.999242][ T680] R10: 00007f5667668ef8 R11: 0000000000000246 R12: 0000000000000002 [ 83.999460][ T680] R13: 0000000067795688 R14: 0000000000498600 R15: 0000000000000000 [ 83.999686][ T680]