[ 10.771346][ T249] ip (249) used greatest stack depth: 24400 bytes left [ 11.548175][ T272] ip (272) used greatest stack depth: 23984 bytes left [ 16.022140][ T327] gre: GRE over IPv4 demultiplexor driver [ 16.094657][ T327] ip6_gre: GRE over IPv6 tunneling driver [ 16.361244][ T333] ip (333) used greatest stack depth: 23840 bytes left [ 17.774384][ T350] 8021q: 802.1Q VLAN Support v1.8 [ 20.893273][ T388] GACT probability NOT on [ 1335.678213][T17311] [ 1335.678433][T17311] ============================================ [ 1335.678626][T17311] WARNING: possible recursive locking detected [ 1335.678806][T17311] 6.13.0-rc5-virtme #1 Not tainted [ 1335.678952][T17311] -------------------------------------------- [ 1335.679133][T17311] ip/17311 is trying to acquire lock: [ 1335.679281][T17311] ffffffffb17d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1335.679599][T17311] [ 1335.679599][T17311] but task is already holding lock: [ 1335.679819][T17311] ffffffffb17d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1335.680124][T17311] [ 1335.680124][T17311] other info that might help us debug this: [ 1335.680347][T17311] Possible unsafe locking scenario: [ 1335.680347][T17311] [ 1335.680577][T17311] CPU0 [ 1335.680692][T17311] ---- [ 1335.680805][T17311] lock((netdev_chain).rwsem); [ 1335.680954][T17311] lock((netdev_chain).rwsem); [ 1335.681104][T17311] [ 1335.681104][T17311] *** DEADLOCK *** [ 1335.681104][T17311] [ 1335.681359][T17311] May be due to missing lock nesting notation [ 1335.681359][T17311] [ 1335.681685][T17311] 2 locks held by ip/17311: [ 1335.681916][T17311] #0: ffffffffb17e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1335.682323][T17311] #1: ffffffffb17d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1335.682783][T17311] [ 1335.682783][T17311] stack backtrace: [ 1335.683058][T17311] CPU: 2 UID: 0 PID: 17311 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1335.683414][T17311] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1335.683717][T17311] Call Trace: [ 1335.683900][T17311] [ 1335.684032][T17311] dump_stack_lvl+0x82/0xd0 [ 1335.684287][T17311] print_deadlock_bug+0x40a/0x650 [ 1335.684532][T17311] validate_chain+0x5bf/0xae0 [ 1335.684774][T17311] ? __pfx_validate_chain+0x10/0x10 [ 1335.685017][T17311] ? hlock_class+0x4e/0x130 [ 1335.685254][T17311] ? mark_lock+0x38/0x3e0 [ 1335.685440][T17311] __lock_acquire+0xb9a/0x1680 [ 1335.685685][T17311] lock_acquire.part.0+0xeb/0x330 [ 1335.685922][T17311] ? blocking_notifier_call_chain+0x50/0x90 [ 1335.686229][T17311] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1335.686529][T17311] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1335.686764][T17311] ? trace_lock_acquire+0x14c/0x1f0 [ 1335.687000][T17311] ? lock_acquire+0x32/0xc0 [ 1335.687238][T17311] ? blocking_notifier_call_chain+0x50/0x90 [ 1335.687516][T17311] down_read+0x9f/0x340 [ 1335.687686][T17311] ? blocking_notifier_call_chain+0x50/0x90 [ 1335.687900][T17311] ? __pfx_down_read+0x10/0x10 [ 1335.688047][T17311] ? __lock_release+0x103/0x460 [ 1335.688196][T17311] ? netconsole_netdev_event+0x2c1/0x620 [ 1335.688346][T17311] ? __pfx___lock_release+0x10/0x10 [ 1335.688494][T17311] blocking_notifier_call_chain+0x50/0x90 [ 1335.688644][T17311] __netdev_upper_dev_unlink+0xd9/0x220 [ 1335.688845][T17311] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1335.689044][T17311] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1335.689193][T17311] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1335.689377][T17311] ? rtnl_is_locked+0x15/0x20 [ 1335.689527][T17311] netdev_upper_dev_unlink+0x71/0xa0 [ 1335.689675][T17311] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1335.689869][T17311] ? netconsole_netdev_event+0x2c1/0x620 [ 1335.690023][T17311] ? mutex_is_locked+0x1c/0x60 [ 1335.690172][T17311] ? rtnl_is_locked+0x15/0x20 [ 1335.690318][T17311] ? netdev_master_upper_dev_get+0x13/0x120 [ 1335.690517][T17311] vrf_device_event+0x78/0xe0 [vrf] [ 1335.690670][T17311] notifier_call_chain+0xcd/0x150 [ 1335.690829][T17311] blocking_notifier_call_chain+0x66/0x90 [ 1335.690975][T17311] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1335.691186][T17311] ? hlock_class+0x4e/0x130 [ 1335.691331][T17311] ? mark_lock+0x38/0x3e0 [ 1335.691443][T17311] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1335.691625][T17311] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1335.691819][T17311] ? kfree+0xf3/0x330 [ 1335.691933][T17311] ? vlan_vid_del+0x310/0x5e0 [ 1335.692082][T17311] ? vlan_vid_del+0x310/0x5e0 [ 1335.692240][T17311] rtnl_dellink+0x348/0xa40 [ 1335.692392][T17311] ? __pfx_rtnl_dellink+0x10/0x10 [ 1335.692561][T17311] ? find_held_lock+0x2c/0x110 [ 1335.692711][T17311] ? __lock_release+0x103/0x460 [ 1335.692871][T17311] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1335.693023][T17311] ? __pfx___lock_release+0x10/0x10 [ 1335.693169][T17311] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1335.693327][T17311] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1335.693474][T17311] ? __pfx_rtnl_dellink+0x10/0x10 [ 1335.693625][T17311] rtnetlink_rcv_msg+0x712/0xc10 [ 1335.693780][T17311] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1335.693928][T17311] ? hlock_class+0x4e/0x130 [ 1335.694080][T17311] ? mark_lock+0x38/0x3e0 [ 1335.694196][T17311] ? __lock_acquire+0xb9a/0x1680 [ 1335.694347][T17311] netlink_rcv_skb+0x130/0x360 [ 1335.694502][T17311] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1335.694649][T17311] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1335.694813][T17311] ? netlink_deliver_tap+0x13e/0x340 [ 1335.694966][T17311] ? netlink_deliver_tap+0xc3/0x340 [ 1335.695115][T17311] netlink_unicast+0x44b/0x710 [ 1335.695265][T17311] ? __pfx_netlink_unicast+0x10/0x10 [ 1335.695418][T17311] ? find_held_lock+0x2c/0x110 [ 1335.695572][T17311] netlink_sendmsg+0x723/0xbe0 [ 1335.695722][T17311] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1335.695886][T17311] ____sys_sendmsg+0x7ac/0xa10 [ 1335.696037][T17311] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1335.696183][T17311] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1335.696372][T17311] ___sys_sendmsg+0xee/0x170 [ 1335.696519][T17311] ? __pfx____sys_sendmsg+0x10/0x10 [ 1335.696673][T17311] ? kasan_save_stack+0x34/0x50 [ 1335.696835][T17311] ? kasan_save_stack+0x24/0x50 [ 1335.696980][T17311] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1335.697128][T17311] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1335.697314][T17311] ? __x64_sys_close+0x7c/0xd0 [ 1335.697470][T17311] ? do_syscall_64+0xc1/0x1d0 [ 1335.697614][T17311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1335.697814][T17311] ? __lock_acquire+0xb9a/0x1680 [ 1335.697962][T17311] ? find_held_lock+0x2c/0x110 [ 1335.698108][T17311] ? __lock_release+0x103/0x460 [ 1335.698253][T17311] ? __virt_addr_valid+0x22b/0x430 [ 1335.698402][T17311] ? __pfx___lock_release+0x10/0x10 [ 1335.698573][T17311] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1335.698725][T17311] __sys_sendmsg+0x109/0x1a0 [ 1335.698888][T17311] ? __pfx___sys_sendmsg+0x10/0x10 [ 1335.699036][T17311] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1335.699222][T17311] do_syscall_64+0xc1/0x1d0 [ 1335.699370][T17311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1335.699552][T17311] RIP: 0033:0x7f01374db9a7 [ 1335.699712][T17311] 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 [ 1335.700270][T17311] RSP: 002b:00007ffc264d63c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1335.700507][T17311] RAX: ffffffffffffffda RBX: 00007ffc264d6af0 RCX: 00007f01374db9a7 [ 1335.700742][T17311] RDX: 0000000000000000 RSI: 00007ffc264d6430 RDI: 0000000000000005 [ 1335.700971][T17311] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1335.701300][T17311] R10: 00007f0137399ef8 R11: 0000000000000246 R12: 0000000000000002 [ 1335.701636][T17311] R13: 0000000067790062 R14: 0000000000498600 R15: 0000000000000000 [ 1335.701976][T17311]