[ 9.108776][ T193] ip (193) used greatest stack depth: 23808 bytes left [ 11.097238][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 11.228401][ T292] gre: GRE over IPv4 demultiplexer driver [ 11.271289][ T292] ip6_gre: GRE over IPv6 tunneling driver [ 18.127446][ T385] GACT probability NOT on [ 18.223900][ C3] [ 18.223983][ C3] ======================================================== [ 18.224134][ C3] WARNING: possible irq lock inversion dependency detected [ 18.224278][ C3] 7.1.0-rc5-virtme #1 Not tainted [ 18.224374][ C3] -------------------------------------------------------- [ 18.224516][ C3] mausezahn/390 just changed the state of lock: [ 18.224633][ C3] ff11000009c7bd78 (&ndev->lock){++.-}-{3:3}, at: ipv6_get_lladdr+0xa8/0x3f0 [ 18.224813][ C3] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 18.224956][ C3] (acaddr_hash_lock){+.+.}-{3:3} [ 18.224959][ C3] [ 18.224959][ C3] [ 18.224959][ C3] and interrupts could create inverse lock ordering between them. [ 18.224959][ C3] [ 18.225304][ C3] [ 18.225304][ C3] other info that might help us debug this: [ 18.225443][ C3] Possible interrupt unsafe locking scenario: [ 18.225443][ C3] [ 18.225585][ C3] CPU0 CPU1 [ 18.225684][ C3] ---- ---- [ 18.225778][ C3] lock(acaddr_hash_lock); [ 18.225874][ C3] local_irq_disable(); [ 18.225994][ C3] lock(&ndev->lock); [ 18.226116][ C3] lock(acaddr_hash_lock); [ 18.226235][ C3] [ 18.226307][ C3] lock(&ndev->lock); [ 18.226380][ C3] [ 18.226380][ C3] *** DEADLOCK *** [ 18.226380][ C3] [ 18.226519][ C3] 6 locks held by mausezahn/390: [ 18.226615][ C3] #0: ffffffff98577d20 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x561/0x1490 [ 18.226786][ C3] #1: ffffffff98577d20 (rcu_read_lock){....}-{1:3}, at: ip_output+0xa9/0x660 [ 18.226953][ C3] #2: ffffffff98577d20 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x25c/0x1bc0 [ 18.227119][ C3] #3: ffffffff98577cc0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1fe/0x1b60 [ 18.227287][ C3] #4: ffffffff98577d20 (rcu_read_lock){....}-{1:3}, at: ip6_output+0x11d/0x7f0 [ 18.227454][ C3] #5: ffffffff98577d20 (rcu_read_lock){....}-{1:3}, at: ipv6_get_lladdr+0x36/0x3f0 [ 18.227619][ C3] [ 18.227619][ C3] the shortest dependencies between 2nd lock and 1st lock: [ 18.227785][ C3] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 18.227884][ C3] HARDIRQ-ON-W at: [ 18.227958][ C3] __lock_acquire+0x378/0xc10 [ 18.228081][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.228199][ C3] _raw_spin_lock+0x33/0x40 [ 18.228320][ C3] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 18.228463][ C3] __ipv6_dev_ac_inc+0x57e/0x930 [ 18.228582][ C3] addrconf_join_anycast+0x1bc/0x260 [ 18.228706][ C3] __ipv6_ifa_notify+0x75b/0xad0 [ 18.228825][ C3] addrconf_dad_completed+0x14b/0xe10 [ 18.228967][ C3] addrconf_dad_begin+0x2e1/0x540 [ 18.229085][ C3] addrconf_dad_work+0x170/0x930 [ 18.229203][ C3] process_one_work+0xdf8/0x1410 [ 18.229325][ C3] worker_thread+0x4f1/0xd60 [ 18.229444][ C3] kthread+0x367/0x460 [ 18.229562][ C3] ret_from_fork+0x474/0x6b0 [ 18.229686][ C3] ret_from_fork_asm+0x11/0x20 [ 18.229806][ C3] SOFTIRQ-ON-W at: [ 18.229884][ C3] __lock_acquire+0x378/0xc10 [ 18.230004][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.230122][ C3] _raw_spin_lock+0x33/0x40 [ 18.230242][ C3] __ipv6_dev_ac_dec+0x236/0x5d0 [ 18.230361][ C3] addrconf_leave_anycast+0x1bc/0x260 [ 18.230503][ C3] __ipv6_ifa_notify+0x6b4/0xad0 [ 18.230625][ C3] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 18.230771][ C3] addrconf_notify+0x339/0xf30 [ 18.230892][ C3] notifier_call_chain+0xb0/0x320 [ 18.231011][ C3] __netdev_upper_dev_link+0x3a5/0x590 [ 18.231155][ C3] netdev_master_upper_dev_link+0x86/0xb0 [ 18.231298][ C3] vrf_add_slave+0xdd/0x210 [vrf] [ 18.231419][ C3] do_set_master+0x357/0x580 [ 18.231539][ C3] do_setlink.isra.0+0xa31/0x2750 [ 18.231658][ C3] rtnl_newlink+0x8d1/0xef0 [ 18.231780][ C3] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 18.231900][ C3] netlink_rcv_skb+0x14e/0x3a0 [ 18.232022][ C3] netlink_unicast+0x486/0x750 [ 18.232142][ C3] netlink_sendmsg+0x735/0xc60 [ 18.232261][ C3] ____sys_sendmsg+0x419/0x850 [ 18.232386][ C3] ___sys_sendmsg+0x14e/0x1d0 [ 18.232507][ C3] __sys_sendmsg+0x145/0x1f0 [ 18.232627][ C3] do_syscall_64+0x117/0x590 [ 18.232749][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.232892][ C3] INITIAL USE at: [ 18.232965][ C3] __lock_acquire+0x378/0xc10 [ 18.233084][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.233203][ C3] _raw_spin_lock+0x33/0x40 [ 18.233326][ C3] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 18.233469][ C3] __ipv6_dev_ac_inc+0x57e/0x930 [ 18.233588][ C3] addrconf_join_anycast+0x1bc/0x260 [ 18.233712][ C3] __ipv6_ifa_notify+0x75b/0xad0 [ 18.233833][ C3] addrconf_dad_completed+0x14b/0xe10 [ 18.233955][ C3] addrconf_dad_begin+0x2e1/0x540 [ 18.234076][ C3] addrconf_dad_work+0x170/0x930 [ 18.234195][ C3] process_one_work+0xdf8/0x1410 [ 18.234314][ C3] worker_thread+0x4f1/0xd60 [ 18.234433][ C3] kthread+0x367/0x460 [ 18.234554][ C3] ret_from_fork+0x474/0x6b0 [ 18.234676][ C3] ret_from_fork_asm+0x11/0x20 [ 18.234797][ C3] } [ 18.234847][ C3] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 18.234994][ C3] ... acquired at: [ 18.235065][ C3] __lock_acquire+0x508/0xc10 [ 18.235162][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.235259][ C3] _raw_spin_lock+0x33/0x40 [ 18.235353][ C3] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 18.235471][ C3] __ipv6_dev_ac_inc+0x57e/0x930 [ 18.235566][ C3] addrconf_join_anycast+0x1bc/0x260 [ 18.235660][ C3] __ipv6_ifa_notify+0x75b/0xad0 [ 18.235760][ C3] addrconf_dad_completed+0x14b/0xe10 [ 18.235858][ C3] addrconf_dad_begin+0x2e1/0x540 [ 18.235953][ C3] addrconf_dad_work+0x170/0x930 [ 18.236048][ C3] process_one_work+0xdf8/0x1410 [ 18.236144][ C3] worker_thread+0x4f1/0xd60 [ 18.236239][ C3] kthread+0x367/0x460 [ 18.236313][ C3] ret_from_fork+0x474/0x6b0 [ 18.236409][ C3] ret_from_fork_asm+0x11/0x20 [ 18.236505][ C3] [ 18.236558][ C3] -> (&ndev->lock){++.-}-{3:3} { [ 18.236655][ C3] HARDIRQ-ON-W at: [ 18.236731][ C3] __lock_acquire+0x378/0xc10 [ 18.236850][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.236969][ C3] _raw_write_lock_bh+0x38/0x50 [ 18.237089][ C3] addrconf_permanent_addr+0x108/0x9c0 [ 18.237211][ C3] addrconf_notify+0x151/0xf30 [ 18.237332][ C3] notifier_call_chain+0xb0/0x320 [ 18.237452][ C3] __dev_notify_flags+0xde/0x280 [ 18.237572][ C3] netif_change_flags+0xfe/0x190 [ 18.237696][ C3] do_setlink.isra.0+0x1cc3/0x2750 [ 18.237817][ C3] rtnl_newlink+0x8d1/0xef0 [ 18.237937][ C3] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 18.238057][ C3] netlink_rcv_skb+0x14e/0x3a0 [ 18.238177][ C3] netlink_unicast+0x486/0x750 [ 18.238297][ C3] netlink_sendmsg+0x735/0xc60 [ 18.238416][ C3] ____sys_sendmsg+0x419/0x850 [ 18.238536][ C3] ___sys_sendmsg+0x14e/0x1d0 [ 18.238656][ C3] __sys_sendmsg+0x145/0x1f0 [ 18.238781][ C3] do_syscall_64+0x117/0x590 [ 18.238900][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.239042][ C3] HARDIRQ-ON-R at: [ 18.239116][ C3] __lock_acquire+0x378/0xc10 [ 18.239238][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.239357][ C3] _raw_read_lock_bh+0x44/0x80 [ 18.239477][ C3] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 18.239620][ C3] inet6_fill_link_af+0x5c/0xe0 [ 18.239743][ C3] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 18.239885][ C3] rtnl_getlink+0x9c9/0xeb0 [ 18.240004][ C3] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 18.240123][ C3] netlink_rcv_skb+0x14e/0x3a0 [ 18.240243][ C3] netlink_unicast+0x486/0x750 [ 18.240363][ C3] netlink_sendmsg+0x735/0xc60 [ 18.240483][ C3] ____sys_sendmsg+0x419/0x850 [ 18.240602][ C3] ___sys_sendmsg+0x14e/0x1d0 [ 18.240724][ C3] __sys_sendmsg+0x145/0x1f0 [ 18.240844][ C3] do_syscall_64+0x117/0x590 [ 18.240963][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.241106][ C3] IN-SOFTIRQ-R at: [ 18.241182][ C3] __lock_acquire+0x378/0xc10 [ 18.241303][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.241422][ C3] _raw_read_lock_bh+0x44/0x80 [ 18.241541][ C3] ipv6_get_lladdr+0xa8/0x3f0 [ 18.241665][ C3] ndisc_send_ns+0xf3/0x120 [ 18.241787][ C3] ndisc_solicit+0x314/0x480 [ 18.241907][ C3] neigh_probe+0xb3/0x100 [ 18.242028][ C3] __neigh_event_send+0x802/0x1070 [ 18.242151][ C3] neigh_resolve_output+0xbe/0x140 [ 18.242272][ C3] ip6_finish_output2+0x423/0x1300 [ 18.242390][ C3] ip6_finish_output+0x646/0xda0 [ 18.242509][ C3] ip6_output+0x23f/0x7f0 [ 18.242628][ C3] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 18.242774][ C3] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 18.242895][ C3] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 18.243038][ C3] dev_hard_start_xmit+0xf8/0x690 [ 18.243157][ C3] __dev_queue_xmit+0xbf4/0x1b60 [ 18.243277][ C3] ip_finish_output2+0x5b9/0x1bc0 [ 18.243398][ C3] ip_output+0x1ca/0x660 [ 18.243517][ C3] ip_rcv+0xdc/0x3d0 [ 18.243613][ C3] __netif_receive_skb_one_core+0xfc/0x180 [ 18.243763][ C3] process_backlog+0x2bc/0x1490 [ 18.243882][ C3] __napi_poll+0xa7/0x3b0 [ 18.244001][ C3] net_rx_action+0x513/0xf50 [ 18.244122][ C3] handle_softirqs+0x1d8/0x940 [ 18.244243][ C3] do_softirq+0xa9/0xe0 [ 18.244362][ C3] __local_bh_enable_ip+0x113/0x140 [ 18.244482][ C3] __dev_queue_xmit+0x95b/0x1b60 [ 18.244603][ C3] packet_snd+0xfad/0x1990 [ 18.244729][ C3] __sys_sendto+0x2c9/0x400 [ 18.244849][ C3] __x64_sys_sendto+0xe4/0x1f0 [ 18.244970][ C3] do_syscall_64+0x117/0x590 [ 18.245090][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.245234][ C3] INITIAL USE at: [ 18.245307][ C3] __lock_acquire+0x378/0xc10 [ 18.245428][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.245549][ C3] _raw_write_lock_bh+0x38/0x50 [ 18.245674][ C3] addrconf_permanent_addr+0x108/0x9c0 [ 18.245795][ C3] addrconf_notify+0x151/0xf30 [ 18.245916][ C3] notifier_call_chain+0xb0/0x320 [ 18.246037][ C3] __dev_notify_flags+0xde/0x280 [ 18.246157][ C3] netif_change_flags+0xfe/0x190 [ 18.246281][ C3] do_setlink.isra.0+0x1cc3/0x2750 [ 18.246402][ C3] rtnl_newlink+0x8d1/0xef0 [ 18.246522][ C3] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 18.246642][ C3] netlink_rcv_skb+0x14e/0x3a0 [ 18.246770][ C3] netlink_unicast+0x486/0x750 [ 18.246891][ C3] netlink_sendmsg+0x735/0xc60 [ 18.247010][ C3] ____sys_sendmsg+0x419/0x850 [ 18.247134][ C3] ___sys_sendmsg+0x14e/0x1d0 [ 18.247255][ C3] __sys_sendmsg+0x145/0x1f0 [ 18.247376][ C3] do_syscall_64+0x117/0x590 [ 18.247496][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.247641][ C3] INITIAL READ USE at: [ 18.247718][ C3] __lock_acquire+0x378/0xc10 [ 18.247837][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.247958][ C3] _raw_read_lock_bh+0x44/0x80 [ 18.248077][ C3] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 18.248224][ C3] inet6_fill_link_af+0x5c/0xe0 [ 18.248345][ C3] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 18.248490][ C3] rtnl_getlink+0x9c9/0xeb0 [ 18.248609][ C3] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 18.248732][ C3] netlink_rcv_skb+0x14e/0x3a0 [ 18.248860][ C3] netlink_unicast+0x486/0x750 [ 18.248981][ C3] netlink_sendmsg+0x735/0xc60 [ 18.249102][ C3] ____sys_sendmsg+0x419/0x850 [ 18.249223][ C3] ___sys_sendmsg+0x14e/0x1d0 [ 18.249343][ C3] __sys_sendmsg+0x145/0x1f0 [ 18.249465][ C3] do_syscall_64+0x117/0x590 [ 18.249591][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.249739][ C3] } [ 18.249788][ C3] ... key at: [] __key.37+0x0/0x40 [ 18.249934][ C3] ... acquired at: [ 18.250010][ C3] mark_lock+0x1d7/0xa00 [ 18.250108][ C3] mark_usage+0x42/0x170 [ 18.250204][ C3] __lock_acquire+0x378/0xc10 [ 18.250305][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.250399][ C3] _raw_read_lock_bh+0x44/0x80 [ 18.250494][ C3] ipv6_get_lladdr+0xa8/0x3f0 [ 18.250588][ C3] ndisc_send_ns+0xf3/0x120 [ 18.250689][ C3] ndisc_solicit+0x314/0x480 [ 18.250784][ C3] neigh_probe+0xb3/0x100 [ 18.250885][ C3] __neigh_event_send+0x802/0x1070 [ 18.250981][ C3] neigh_resolve_output+0xbe/0x140 [ 18.251077][ C3] ip6_finish_output2+0x423/0x1300 [ 18.251174][ C3] ip6_finish_output+0x646/0xda0 [ 18.251270][ C3] ip6_output+0x23f/0x7f0 [ 18.251371][ C3] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 18.251491][ C3] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 18.251588][ C3] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 18.251712][ C3] dev_hard_start_xmit+0xf8/0x690 [ 18.251808][ C3] __dev_queue_xmit+0xbf4/0x1b60 [ 18.251905][ C3] ip_finish_output2+0x5b9/0x1bc0 [ 18.252000][ C3] ip_output+0x1ca/0x660 [ 18.252096][ C3] ip_rcv+0xdc/0x3d0 [ 18.252170][ C3] __netif_receive_skb_one_core+0xfc/0x180 [ 18.252292][ C3] process_backlog+0x2bc/0x1490 [ 18.252389][ C3] __napi_poll+0xa7/0x3b0 [ 18.252484][ C3] net_rx_action+0x513/0xf50 [ 18.252580][ C3] handle_softirqs+0x1d8/0x940 [ 18.252677][ C3] do_softirq+0xa9/0xe0 [ 18.252750][ C3] __local_bh_enable_ip+0x113/0x140 [ 18.252847][ C3] __dev_queue_xmit+0x95b/0x1b60 [ 18.252943][ C3] packet_snd+0xfad/0x1990 [ 18.253040][ C3] __sys_sendto+0x2c9/0x400 [ 18.253136][ C3] __x64_sys_sendto+0xe4/0x1f0 [ 18.253233][ C3] do_syscall_64+0x117/0x590 [ 18.253336][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.253455][ C3] [ 18.253505][ C3] [ 18.253505][ C3] stack backtrace: [ 18.253626][ C3] CPU: 3 UID: 0 PID: 390 Comm: mausezahn Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 18.253629][ C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.253631][ C3] Call Trace: [ 18.253632][ C3] [ 18.253633][ C3] dump_stack_lvl+0x6f/0xa0 [ 18.253638][ C3] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 18.253641][ C3] mark_lock_irq+0x989/0x9c0 [ 18.253644][ C3] mark_lock+0x1d7/0xa00 [ 18.253646][ C3] mark_usage+0x42/0x170 [ 18.253647][ C3] __lock_acquire+0x378/0xc10 [ 18.253649][ C3] ? __lock_acquire+0x508/0xc10 [ 18.253650][ C3] lock_acquire.part.0+0xbc/0x260 [ 18.253652][ C3] ? ipv6_get_lladdr+0xa8/0x3f0 [ 18.253654][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253657][ C3] ? lock_acquire+0x134/0x160 [ 18.253659][ C3] _raw_read_lock_bh+0x44/0x80 [ 18.253660][ C3] ? ipv6_get_lladdr+0xa8/0x3f0 [ 18.253662][ C3] ipv6_get_lladdr+0xa8/0x3f0 [ 18.253664][ C3] ndisc_send_ns+0xf3/0x120 [ 18.253665][ C3] ? __ipv6_chk_addr_and_flags+0x251/0x5f0 [ 18.253671][ C3] ? ndisc_parse_options+0x30/0x30 [ 18.253672][ C3] ? __ipv6_chk_addr_and_flags+0x25b/0x5f0 [ 18.253675][ C3] ndisc_solicit+0x314/0x480 [ 18.253676][ C3] ? ndisc_send_ns+0x120/0x120 [ 18.253678][ C3] ? neigh_probe+0x62/0x100 [ 18.253680][ C3] neigh_probe+0xb3/0x100 [ 18.253682][ C3] __neigh_event_send+0x802/0x1070 [ 18.253684][ C3] ? warn_bogus_irq_restore+0x1/0x20 [ 18.253686][ C3] ? ___neigh_create+0x811/0x1070 [ 18.253689][ C3] neigh_resolve_output+0xbe/0x140 [ 18.253690][ C3] ip6_finish_output2+0x423/0x1300 [ 18.253693][ C3] ? ip6_xmit+0x2000/0x2000 [ 18.253694][ C3] ? lock_acquire.part.0+0xbc/0x260 [ 18.253695][ C3] ? find_held_lock+0x2b/0x80 [ 18.253698][ C3] ? __lock_release.isra.0+0x6b/0x1a0 [ 18.253700][ C3] ? ip6_mtu+0x15d/0x310 [ 18.253702][ C3] ip6_finish_output+0x646/0xda0 [ 18.253704][ C3] ip6_output+0x23f/0x7f0 [ 18.253706][ C3] ? ip6_finish_output+0xda0/0xda0 [ 18.253707][ C3] ? l3mdev_l3_out.constprop.0+0xe5/0x340 [ 18.253710][ C3] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 18.253714][ C3] ? ip_route_input+0x420/0x420 [ip6_tunnel] [ 18.253715][ C3] ? pskb_expand_head+0x4ac/0xf50 [ 18.253718][ C3] ? __lock_acquire+0x508/0xc10 [ 18.253720][ C3] ? __pskb_copy_fclone+0x1080/0x1080 [ 18.253722][ C3] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 18.253725][ C3] ? __ipv6_chk_addr_and_flags+0x230/0x5f0 [ 18.253727][ C3] ? gre_build_header+0xa70/0xa70 [ip6_gre] [ 18.253729][ C3] ? ip6_tnl_xmit_ctl+0x21e/0x390 [ip6_tunnel] [ 18.253730][ C3] ? __asan_memcpy+0x3c/0x60 [ 18.253734][ C3] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 18.253736][ C3] ? __gre6_xmit+0x1910/0x1910 [ip6_gre] [ 18.253738][ C3] ? sock_def_readable+0x156/0x490 [ 18.253740][ C3] ? find_held_lock+0x2b/0x80 [ 18.253743][ C3] ? dev_queue_xmit_nit+0x642/0x9e0 [ 18.253746][ C3] dev_hard_start_xmit+0xf8/0x690 [ 18.253748][ C3] ? sync_exp_reset_tree_hotplug+0x3a0/0x3f0 [ 18.253750][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253751][ C3] __dev_queue_xmit+0xbf4/0x1b60 [ 18.253754][ C3] ? __lock_acquire+0x508/0xc10 [ 18.253756][ C3] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 18.253757][ C3] ? find_held_lock+0x2b/0x80 [ 18.253759][ C3] ? __lock_release.isra.0+0x6b/0x1a0 [ 18.253761][ C3] ? ___neigh_create+0x811/0x1070 [ 18.253763][ C3] ? sync_exp_reset_tree_hotplug+0x3a0/0x3f0 [ 18.253765][ C3] ip_finish_output2+0x5b9/0x1bc0 [ 18.253768][ C3] ? ip_dst_mtu_maybe_forward+0x261/0x670 [ 18.253770][ C3] ? ip4_dst_hoplimit+0x320/0x320 [ 18.253772][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253774][ C3] ip_output+0x1ca/0x660 [ 18.253775][ C3] ? ip_finish_output+0x460/0x460 [ 18.253776][ C3] ? ip4_frag_init+0x720/0x720 [ 18.253778][ C3] ? ip_forward+0xfa7/0x1570 [ 18.253781][ C3] ? process_backlog+0x561/0x1490 [ 18.253782][ C3] ip_rcv+0xdc/0x3d0 [ 18.253784][ C3] ? ip_local_deliver+0x4c0/0x4c0 [ 18.253786][ C3] ? mark_usage+0x61/0x170 [ 18.253787][ C3] ? __lock_acquire+0x508/0xc10 [ 18.253789][ C3] __netif_receive_skb_one_core+0xfc/0x180 [ 18.253790][ C3] ? lock_acquire.part.0+0xbc/0x260 [ 18.253792][ C3] ? __netif_receive_skb_list_core+0x9e0/0x9e0 [ 18.253794][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253796][ C3] process_backlog+0x2bc/0x1490 [ 18.253798][ C3] __napi_poll+0xa7/0x3b0 [ 18.253799][ C3] net_rx_action+0x513/0xf50 [ 18.253801][ C3] ? __napi_poll+0x3b0/0x3b0 [ 18.253803][ C3] ? find_held_lock+0x2b/0x80 [ 18.253806][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253808][ C3] handle_softirqs+0x1d8/0x940 [ 18.253810][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253811][ C3] ? _local_bh_enable+0xd0/0xd0 [ 18.253813][ C3] ? trace_csd_function_exit+0xb3/0x1a0 [ 18.253815][ C3] ? rcu_is_watching+0x15/0xd0 [ 18.253817][ C3] do_softirq+0xa9/0xe0 [ 18.253818][ C3] [ 18.253819][ C3] [ 18.253820][ C3] ? __dev_queue_xmit+0x946/0x1b60 [ 18.253821][ C3] __local_bh_enable_ip+0x113/0x140 [ 18.253823][ C3] __dev_queue_xmit+0x95b/0x1b60 [ 18.253825][ C3] ? _copy_from_iter+0x1bb/0x1810 [ 18.253829][ C3] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 18.253831][ C3] ? net_dim+0x730/0xd70 [ 18.253833][ C3] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 18.253836][ C3] ? packet_release+0xc70/0xc70 [ 18.253838][ C3] packet_snd+0xfad/0x1990 [ 18.253841][ C3] ? tpacket_snd+0x19e0/0x19e0 [ 18.253843][ C3] ? __might_fault+0x97/0x140 [ 18.253846][ C3] ? __might_fault+0x97/0x140 [ 18.253847][ C3] ? __might_fault+0x97/0x140 [ 18.253849][ C3] __sys_sendto+0x2c9/0x400 [ 18.253851][ C3] ? __ia32_sys_getpeername+0xd0/0xd0 [ 18.253854][ C3] ? sock_ioctl+0x3cb/0x5f0 [ 18.253857][ C3] ? do_user_addr_fault+0x325/0xe30 [ 18.253860][ C3] __x64_sys_sendto+0xe4/0x1f0 [ 18.253862][ C3] ? trace_irq_enable.constprop.0+0x9b/0x180 [ 18.253865][ C3] ? lockdep_hardirqs_on+0x8c/0x130 [ 18.253867][ C3] ? do_syscall_64+0x82/0x590 [ 18.253868][ C3] do_syscall_64+0x117/0x590 [ 18.253869][ C3] ? trace_hardirqs_off+0xd/0x30 [ 18.253871][ C3] ? exc_page_fault+0xee/0x100 [ 18.253872][ C3] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.253874][ C3] RIP: 0033:0x7f388cd6708e [ 18.253877][ C3] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 18.253878][ C3] RSP: 002b:00007ffc7fe0a230 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 18.253881][ C3] RAX: ffffffffffffffda RBX: 00005628a1f8ab22 RCX: 00007f388cd6708e [ 18.253882][ C3] RDX: 0000000000000062 RSI: 00005628a1f8ab22 RDI: 0000000000000005 [ 18.253883][ C3] RBP: 00007ffc7fe0a240 R08: 00007ffc7fe0a290 R09: 0000000000000014 [ 18.253884][ C3] R10: 0000000000000000 R11: 0000000000000202 R12: 00005628a1f8a830 [ 18.253885][ C3] R13: 0000000000000062 R14: 0000000000000005 R15: 00005628a1f8a830 [ 18.253887][ C3]