[ 9.495088][ T186] ip (186) used greatest stack depth: 23496 bytes left [ 11.293279][ T277] 8021q: 802.1Q VLAN Support v1.8 [ 11.404272][ T282] gre: GRE over IPv4 demultiplexer driver [ 11.439457][ T282] ip6_gre: GRE over IPv6 tunneling driver [ 17.853854][ T368] GACT probability NOT on [ 17.964200][ C2] [ 17.964280][ C2] ======================================================== [ 17.964440][ C2] WARNING: possible irq lock inversion dependency detected [ 17.964584][ C2] 7.1.0-rc5-virtme #1 Not tainted [ 17.964681][ C2] -------------------------------------------------------- [ 17.964821][ C2] mausezahn/374 just changed the state of lock: [ 17.964940][ C2] ff1100000e62bd78 (&ndev->lock){++.-}-{3:3}, at: ipv6_get_lladdr+0xa8/0x3f0 [ 17.965114][ C2] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 17.965253][ C2] (acaddr_hash_lock){+.+.}-{3:3} [ 17.965256][ C2] [ 17.965256][ C2] [ 17.965256][ C2] and interrupts could create inverse lock ordering between them. [ 17.965256][ C2] [ 17.965605][ C2] [ 17.965605][ C2] other info that might help us debug this: [ 17.965746][ C2] Possible interrupt unsafe locking scenario: [ 17.965746][ C2] [ 17.965890][ C2] CPU0 CPU1 [ 17.965985][ C2] ---- ---- [ 17.966082][ C2] lock(acaddr_hash_lock); [ 17.966179][ C2] local_irq_disable(); [ 17.966298][ C2] lock(&ndev->lock); [ 17.966424][ C2] lock(acaddr_hash_lock); [ 17.966543][ C2] [ 17.966614][ C2] lock(&ndev->lock); [ 17.966687][ C2] [ 17.966687][ C2] *** DEADLOCK *** [ 17.966687][ C2] [ 17.966826][ C2] 6 locks held by mausezahn/374: [ 17.966921][ C2] #0: ffffffffbaf77d20 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x561/0x1490 [ 17.967093][ C2] #1: ffffffffbaf77d20 (rcu_read_lock){....}-{1:3}, at: ip_output+0xa9/0x660 [ 17.967260][ C2] #2: ffffffffbaf77d20 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x25c/0x1bc0 [ 17.967433][ C2] #3: ffffffffbaf77cc0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1fe/0x1b60 [ 17.967602][ C2] #4: ffffffffbaf77d20 (rcu_read_lock){....}-{1:3}, at: ip6_output+0x11d/0x7f0 [ 17.967771][ C2] #5: ffffffffbaf77d20 (rcu_read_lock){....}-{1:3}, at: ipv6_get_lladdr+0x36/0x3f0 [ 17.967939][ C2] [ 17.967939][ C2] the shortest dependencies between 2nd lock and 1st lock: [ 17.968104][ C2] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 17.968204][ C2] HARDIRQ-ON-W at: [ 17.968278][ C2] __lock_acquire+0x378/0xc10 [ 17.968408][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.968528][ C2] _raw_spin_lock+0x33/0x40 [ 17.968650][ C2] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 17.968792][ C2] __ipv6_dev_ac_inc+0x57e/0x930 [ 17.968910][ C2] addrconf_join_anycast+0x1bc/0x260 [ 17.969030][ C2] __ipv6_ifa_notify+0x75b/0xad0 [ 17.969150][ C2] addrconf_dad_completed+0x14b/0xe10 [ 17.969293][ C2] addrconf_dad_begin+0x2e1/0x540 [ 17.969416][ C2] addrconf_dad_work+0x170/0x930 [ 17.969534][ C2] process_one_work+0xdf8/0x1410 [ 17.969656][ C2] worker_thread+0x4f1/0xd60 [ 17.969776][ C2] kthread+0x367/0x460 [ 17.969896][ C2] ret_from_fork+0x474/0x6b0 [ 17.970018][ C2] ret_from_fork_asm+0x11/0x20 [ 17.970137][ C2] SOFTIRQ-ON-W at: [ 17.970209][ C2] __lock_acquire+0x378/0xc10 [ 17.970334][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.970452][ C2] _raw_spin_lock+0x33/0x40 [ 17.970573][ C2] __ipv6_dev_ac_dec+0x236/0x5d0 [ 17.970691][ C2] addrconf_leave_anycast+0x1bc/0x260 [ 17.970834][ C2] __ipv6_ifa_notify+0x6b4/0xad0 [ 17.970956][ C2] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 17.971099][ C2] addrconf_notify+0x339/0xf30 [ 17.971218][ C2] notifier_call_chain+0xb0/0x320 [ 17.971342][ C2] __netdev_upper_dev_link+0x3a5/0x590 [ 17.971487][ C2] netdev_master_upper_dev_link+0x86/0xb0 [ 17.971633][ C2] vrf_add_slave+0xdd/0x210 [vrf] [ 17.971755][ C2] do_set_master+0x357/0x580 [ 17.971875][ C2] do_setlink.isra.0+0xa31/0x2750 [ 17.971995][ C2] rtnl_newlink+0x8d1/0xef0 [ 17.972114][ C2] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 17.972234][ C2] netlink_rcv_skb+0x14e/0x3a0 [ 17.972358][ C2] netlink_unicast+0x486/0x750 [ 17.972478][ C2] netlink_sendmsg+0x735/0xc60 [ 17.972598][ C2] ____sys_sendmsg+0x419/0x850 [ 17.972719][ C2] ___sys_sendmsg+0x14e/0x1d0 [ 17.972838][ C2] __sys_sendmsg+0x145/0x1f0 [ 17.972957][ C2] do_syscall_64+0x117/0x590 [ 17.973078][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.973222][ C2] INITIAL USE at: [ 17.973294][ C2] __lock_acquire+0x378/0xc10 [ 17.973417][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.973536][ C2] _raw_spin_lock+0x33/0x40 [ 17.973656][ C2] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 17.973799][ C2] __ipv6_dev_ac_inc+0x57e/0x930 [ 17.973919][ C2] addrconf_join_anycast+0x1bc/0x260 [ 17.974038][ C2] __ipv6_ifa_notify+0x75b/0xad0 [ 17.974158][ C2] addrconf_dad_completed+0x14b/0xe10 [ 17.974278][ C2] addrconf_dad_begin+0x2e1/0x540 [ 17.974403][ C2] addrconf_dad_work+0x170/0x930 [ 17.974523][ C2] process_one_work+0xdf8/0x1410 [ 17.974642][ C2] worker_thread+0x4f1/0xd60 [ 17.974762][ C2] kthread+0x367/0x460 [ 17.974886][ C2] ret_from_fork+0x474/0x6b0 [ 17.975005][ C2] ret_from_fork_asm+0x11/0x20 [ 17.975126][ C2] } [ 17.975178][ C2] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 17.975328][ C2] ... acquired at: [ 17.975401][ C2] __lock_acquire+0x508/0xc10 [ 17.975497][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.975593][ C2] _raw_spin_lock+0x33/0x40 [ 17.975688][ C2] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 17.975805][ C2] __ipv6_dev_ac_inc+0x57e/0x930 [ 17.975900][ C2] addrconf_join_anycast+0x1bc/0x260 [ 17.975997][ C2] __ipv6_ifa_notify+0x75b/0xad0 [ 17.976091][ C2] addrconf_dad_completed+0x14b/0xe10 [ 17.976189][ C2] addrconf_dad_begin+0x2e1/0x540 [ 17.976285][ C2] addrconf_dad_work+0x170/0x930 [ 17.976384][ C2] process_one_work+0xdf8/0x1410 [ 17.976479][ C2] worker_thread+0x4f1/0xd60 [ 17.976576][ C2] kthread+0x367/0x460 [ 17.976647][ C2] ret_from_fork+0x474/0x6b0 [ 17.976742][ C2] ret_from_fork_asm+0x11/0x20 [ 17.976838][ C2] [ 17.976887][ C2] -> (&ndev->lock){++.-}-{3:3} { [ 17.976985][ C2] HARDIRQ-ON-W at: [ 17.977056][ C2] __lock_acquire+0x378/0xc10 [ 17.977177][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.977296][ C2] _raw_write_lock_bh+0x38/0x50 [ 17.977421][ C2] addrconf_permanent_addr+0x108/0x9c0 [ 17.977542][ C2] addrconf_notify+0x151/0xf30 [ 17.977662][ C2] notifier_call_chain+0xb0/0x320 [ 17.977782][ C2] __dev_notify_flags+0xde/0x280 [ 17.977901][ C2] netif_change_flags+0xfe/0x190 [ 17.978020][ C2] do_setlink.isra.0+0x1cc3/0x2750 [ 17.978141][ C2] rtnl_newlink+0x8d1/0xef0 [ 17.978260][ C2] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 17.978382][ C2] netlink_rcv_skb+0x14e/0x3a0 [ 17.978501][ C2] netlink_unicast+0x486/0x750 [ 17.978621][ C2] netlink_sendmsg+0x735/0xc60 [ 17.978739][ C2] ____sys_sendmsg+0x419/0x850 [ 17.978861][ C2] ___sys_sendmsg+0x14e/0x1d0 [ 17.978983][ C2] __sys_sendmsg+0x145/0x1f0 [ 17.979104][ C2] do_syscall_64+0x117/0x590 [ 17.979223][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.979371][ C2] HARDIRQ-ON-R at: [ 17.979443][ C2] __lock_acquire+0x378/0xc10 [ 17.979565][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.979684][ C2] _raw_read_lock_bh+0x44/0x80 [ 17.979804][ C2] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 17.979948][ C2] inet6_fill_link_af+0x5c/0xe0 [ 17.980068][ C2] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 17.980212][ C2] rtnl_getlink+0x9c9/0xeb0 [ 17.980337][ C2] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 17.980455][ C2] netlink_rcv_skb+0x14e/0x3a0 [ 17.980575][ C2] netlink_unicast+0x486/0x750 [ 17.980693][ C2] netlink_sendmsg+0x735/0xc60 [ 17.980814][ C2] ____sys_sendmsg+0x419/0x850 [ 17.980933][ C2] ___sys_sendmsg+0x14e/0x1d0 [ 17.981054][ C2] __sys_sendmsg+0x145/0x1f0 [ 17.981174][ C2] do_syscall_64+0x117/0x590 [ 17.981293][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.981440][ C2] IN-SOFTIRQ-R at: [ 17.981514][ C2] __lock_acquire+0x378/0xc10 [ 17.981634][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.981754][ C2] _raw_read_lock_bh+0x44/0x80 [ 17.981873][ C2] ipv6_get_lladdr+0xa8/0x3f0 [ 17.981993][ C2] ndisc_send_ns+0xf3/0x120 [ 17.982113][ C2] ndisc_solicit+0x314/0x480 [ 17.982234][ C2] neigh_probe+0xb3/0x100 [ 17.982356][ C2] __neigh_event_send+0x802/0x1070 [ 17.982478][ C2] neigh_resolve_output+0xbe/0x140 [ 17.982598][ C2] ip6_finish_output2+0x423/0x1300 [ 17.982718][ C2] ip6_finish_output+0x646/0xda0 [ 17.982837][ C2] ip6_output+0x23f/0x7f0 [ 17.982955][ C2] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 17.983100][ C2] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 17.983222][ C2] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 17.983367][ C2] dev_hard_start_xmit+0xf8/0x690 [ 17.983488][ C2] __dev_queue_xmit+0xbf4/0x1b60 [ 17.983608][ C2] ip_finish_output2+0x5b9/0x1bc0 [ 17.983728][ C2] ip_output+0x1ca/0x660 [ 17.983848][ C2] ip_rcv+0xdc/0x3d0 [ 17.983944][ C2] __netif_receive_skb_one_core+0xfc/0x180 [ 17.984086][ C2] process_backlog+0x2bc/0x1490 [ 17.984206][ C2] __napi_poll+0xa7/0x3b0 [ 17.984327][ C2] net_rx_action+0x513/0xf50 [ 17.984446][ C2] handle_softirqs+0x1d8/0x940 [ 17.984568][ C2] do_softirq+0xa9/0xe0 [ 17.984686][ C2] __local_bh_enable_ip+0x113/0x140 [ 17.984805][ C2] __dev_queue_xmit+0x95b/0x1b60 [ 17.984924][ C2] packet_snd+0xfad/0x1990 [ 17.985047][ C2] __sys_sendto+0x2c9/0x400 [ 17.985166][ C2] __x64_sys_sendto+0xe4/0x1f0 [ 17.985284][ C2] do_syscall_64+0x117/0x590 [ 17.985404][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.985546][ C2] INITIAL USE at: [ 17.985619][ C2] __lock_acquire+0x378/0xc10 [ 17.985740][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.985858][ C2] _raw_write_lock_bh+0x38/0x50 [ 17.985977][ C2] addrconf_permanent_addr+0x108/0x9c0 [ 17.986096][ C2] addrconf_notify+0x151/0xf30 [ 17.986215][ C2] notifier_call_chain+0xb0/0x320 [ 17.986335][ C2] __dev_notify_flags+0xde/0x280 [ 17.986454][ C2] netif_change_flags+0xfe/0x190 [ 17.986572][ C2] do_setlink.isra.0+0x1cc3/0x2750 [ 17.986690][ C2] rtnl_newlink+0x8d1/0xef0 [ 17.986810][ C2] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 17.986928][ C2] netlink_rcv_skb+0x14e/0x3a0 [ 17.987047][ C2] netlink_unicast+0x486/0x750 [ 17.987165][ C2] netlink_sendmsg+0x735/0xc60 [ 17.987283][ C2] ____sys_sendmsg+0x419/0x850 [ 17.987405][ C2] ___sys_sendmsg+0x14e/0x1d0 [ 17.987527][ C2] __sys_sendmsg+0x145/0x1f0 [ 17.987647][ C2] do_syscall_64+0x117/0x590 [ 17.987767][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.987909][ C2] INITIAL READ USE at: [ 17.987983][ C2] __lock_acquire+0x378/0xc10 [ 17.988103][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.988223][ C2] _raw_read_lock_bh+0x44/0x80 [ 17.988358][ C2] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 17.988501][ C2] inet6_fill_link_af+0x5c/0xe0 [ 17.988620][ C2] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 17.988764][ C2] rtnl_getlink+0x9c9/0xeb0 [ 17.988883][ C2] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 17.989002][ C2] netlink_rcv_skb+0x14e/0x3a0 [ 17.989124][ C2] netlink_unicast+0x486/0x750 [ 17.989245][ C2] netlink_sendmsg+0x735/0xc60 [ 17.989370][ C2] ____sys_sendmsg+0x419/0x850 [ 17.989489][ C2] ___sys_sendmsg+0x14e/0x1d0 [ 17.989610][ C2] __sys_sendmsg+0x145/0x1f0 [ 17.989729][ C2] do_syscall_64+0x117/0x590 [ 17.989848][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.989990][ C2] } [ 17.990040][ C2] ... key at: [] __key.37+0x0/0x40 [ 17.990182][ C2] ... acquired at: [ 17.990253][ C2] mark_lock+0x1d7/0xa00 [ 17.990355][ C2] mark_usage+0x42/0x170 [ 17.990449][ C2] __lock_acquire+0x378/0xc10 [ 17.990544][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.990639][ C2] _raw_read_lock_bh+0x44/0x80 [ 17.990734][ C2] ipv6_get_lladdr+0xa8/0x3f0 [ 17.990829][ C2] ndisc_send_ns+0xf3/0x120 [ 17.990984][ C2] ndisc_solicit+0x314/0x480 [ 17.991079][ C2] neigh_probe+0xb3/0x100 [ 17.991176][ C2] __neigh_event_send+0x802/0x1070 [ 17.991272][ C2] neigh_resolve_output+0xbe/0x140 [ 17.991430][ C2] ip6_finish_output2+0x423/0x1300 [ 17.991525][ C2] ip6_finish_output+0x646/0xda0 [ 17.991620][ C2] ip6_output+0x23f/0x7f0 [ 17.991715][ C2] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 17.991896][ C2] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 17.991994][ C2] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 17.992113][ C2] dev_hard_start_xmit+0xf8/0x690 [ 17.992267][ C2] __dev_queue_xmit+0xbf4/0x1b60 [ 17.992367][ C2] ip_finish_output2+0x5b9/0x1bc0 [ 17.992464][ C2] ip_output+0x1ca/0x660 [ 17.992559][ C2] ip_rcv+0xdc/0x3d0 [ 17.992633][ C2] __netif_receive_skb_one_core+0xfc/0x180 [ 17.992808][ C2] process_backlog+0x2bc/0x1490 [ 17.992903][ C2] __napi_poll+0xa7/0x3b0 [ 17.992998][ C2] net_rx_action+0x513/0xf50 [ 17.993150][ C2] handle_softirqs+0x1d8/0x940 [ 17.993247][ C2] do_softirq+0xa9/0xe0 [ 17.993320][ C2] __local_bh_enable_ip+0x113/0x140 [ 17.993420][ C2] __dev_queue_xmit+0x95b/0x1b60 [ 17.993517][ C2] packet_snd+0xfad/0x1990 [ 17.993671][ C2] __sys_sendto+0x2c9/0x400 [ 17.993766][ C2] __x64_sys_sendto+0xe4/0x1f0 [ 17.993863][ C2] do_syscall_64+0x117/0x590 [ 17.993958][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.994132][ C2] [ 17.994181][ C2] [ 17.994181][ C2] stack backtrace: [ 17.994300][ C2] CPU: 2 UID: 0 PID: 374 Comm: mausezahn Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 17.994303][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.994305][ C2] Call Trace: [ 17.994306][ C2] [ 17.994307][ C2] dump_stack_lvl+0x6f/0xa0 [ 17.994312][ C2] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 17.994315][ C2] mark_lock_irq+0x989/0x9c0 [ 17.994317][ C2] mark_lock+0x1d7/0xa00 [ 17.994319][ C2] mark_usage+0x42/0x170 [ 17.994321][ C2] __lock_acquire+0x378/0xc10 [ 17.994322][ C2] ? __lock_acquire+0x508/0xc10 [ 17.994326][ C2] lock_acquire.part.0+0xbc/0x260 [ 17.994327][ C2] ? ipv6_get_lladdr+0xa8/0x3f0 [ 17.994329][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994332][ C2] ? lock_acquire+0x134/0x160 [ 17.994334][ C2] _raw_read_lock_bh+0x44/0x80 [ 17.994336][ C2] ? ipv6_get_lladdr+0xa8/0x3f0 [ 17.994337][ C2] ipv6_get_lladdr+0xa8/0x3f0 [ 17.994339][ C2] ndisc_send_ns+0xf3/0x120 [ 17.994341][ C2] ? __ipv6_chk_addr_and_flags+0x251/0x5f0 [ 17.994343][ C2] ? ndisc_parse_options+0x30/0x30 [ 17.994344][ C2] ? __ipv6_chk_addr_and_flags+0x25b/0x5f0 [ 17.994346][ C2] ndisc_solicit+0x314/0x480 [ 17.994348][ C2] ? ndisc_send_ns+0x120/0x120 [ 17.994350][ C2] ? neigh_probe+0x62/0x100 [ 17.994352][ C2] neigh_probe+0xb3/0x100 [ 17.994353][ C2] __neigh_event_send+0x802/0x1070 [ 17.994355][ C2] ? warn_bogus_irq_restore+0x1/0x20 [ 17.994357][ C2] ? ___neigh_create+0x811/0x1070 [ 17.994360][ C2] neigh_resolve_output+0xbe/0x140 [ 17.994362][ C2] ip6_finish_output2+0x423/0x1300 [ 17.994364][ C2] ? ip6_xmit+0x2000/0x2000 [ 17.994365][ C2] ? lock_acquire.part.0+0xbc/0x260 [ 17.994366][ C2] ? find_held_lock+0x2b/0x80 [ 17.994369][ C2] ? __lock_release.isra.0+0x6b/0x1a0 [ 17.994371][ C2] ? ip6_mtu+0x15d/0x310 [ 17.994373][ C2] ip6_finish_output+0x646/0xda0 [ 17.994375][ C2] ip6_output+0x23f/0x7f0 [ 17.994377][ C2] ? ip6_finish_output+0xda0/0xda0 [ 17.994378][ C2] ? l3mdev_l3_out.constprop.0+0xe5/0x340 [ 17.994381][ C2] ip6_tnl_xmit+0x1713/0x31b0 [ip6_tunnel] [ 17.994385][ C2] ? ip_route_input+0x420/0x420 [ip6_tunnel] [ 17.994386][ C2] ? pskb_expand_head+0x4ac/0xf50 [ 17.994389][ C2] ? __lock_acquire+0x508/0xc10 [ 17.994391][ C2] ? __pskb_copy_fclone+0x1080/0x1080 [ 17.994393][ C2] __gre6_xmit+0x9b6/0x1910 [ip6_gre] [ 17.994395][ C2] ? __ipv6_chk_addr_and_flags+0x1b0/0x5f0 [ 17.994397][ C2] ? gre_build_header+0xa70/0xa70 [ip6_gre] [ 17.994399][ C2] ? ip6_tnl_xmit_ctl+0x21e/0x390 [ip6_tunnel] [ 17.994401][ C2] ? __asan_memcpy+0x3c/0x60 [ 17.994405][ C2] ip6gre_tunnel_xmit+0x8f2/0xd40 [ip6_gre] [ 17.994407][ C2] ? __gre6_xmit+0x1910/0x1910 [ip6_gre] [ 17.994409][ C2] ? sock_def_readable+0x156/0x490 [ 17.994411][ C2] ? find_held_lock+0x2b/0x80 [ 17.994414][ C2] ? dev_queue_xmit_nit+0x642/0x9e0 [ 17.994417][ C2] dev_hard_start_xmit+0xf8/0x690 [ 17.994418][ C2] ? sync_exp_reset_tree_hotplug+0x3a0/0x3f0 [ 17.994420][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994422][ C2] __dev_queue_xmit+0xbf4/0x1b60 [ 17.994424][ C2] ? __lock_acquire+0x508/0xc10 [ 17.994426][ C2] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 17.994428][ C2] ? find_held_lock+0x2b/0x80 [ 17.994430][ C2] ? __lock_release.isra.0+0x6b/0x1a0 [ 17.994432][ C2] ? ___neigh_create+0x811/0x1070 [ 17.994434][ C2] ? sync_exp_reset_tree_hotplug+0x3a0/0x3f0 [ 17.994436][ C2] ip_finish_output2+0x5b9/0x1bc0 [ 17.994438][ C2] ? ip_dst_mtu_maybe_forward+0x261/0x670 [ 17.994440][ C2] ? ip4_dst_hoplimit+0x320/0x320 [ 17.994442][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994444][ C2] ip_output+0x1ca/0x660 [ 17.994446][ C2] ? ip_finish_output+0x460/0x460 [ 17.994447][ C2] ? ip4_frag_init+0x720/0x720 [ 17.994449][ C2] ? ip_forward+0xfa7/0x1570 [ 17.994451][ C2] ? process_backlog+0x561/0x1490 [ 17.994453][ C2] ip_rcv+0xdc/0x3d0 [ 17.994454][ C2] ? ip_local_deliver+0x4c0/0x4c0 [ 17.994457][ C2] ? mark_usage+0x61/0x170 [ 17.994458][ C2] ? __lock_acquire+0x508/0xc10 [ 17.994459][ C2] ? init_data_structures_once.part.0+0x1a7/0x450 [ 17.994461][ C2] __netif_receive_skb_one_core+0xfc/0x180 [ 17.994462][ C2] ? lock_acquire.part.0+0xbc/0x260 [ 17.994463][ C2] ? __netif_receive_skb_list_core+0x9e0/0x9e0 [ 17.994465][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994468][ C2] process_backlog+0x2bc/0x1490 [ 17.994469][ C2] __napi_poll+0xa7/0x3b0 [ 17.994471][ C2] net_rx_action+0x513/0xf50 [ 17.994473][ C2] ? __napi_poll+0x3b0/0x3b0 [ 17.994474][ C2] ? find_held_lock+0x2b/0x80 [ 17.994477][ C2] ? clockevents_program_event+0x307/0x7e0 [ 17.994480][ C2] ? mark_held_locks+0x40/0x70 [ 17.994481][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994483][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994484][ C2] handle_softirqs+0x1d8/0x940 [ 17.994486][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994488][ C2] ? _local_bh_enable+0xd0/0xd0 [ 17.994489][ C2] ? trace_csd_function_exit+0xb3/0x1a0 [ 17.994491][ C2] ? rcu_is_watching+0x15/0xd0 [ 17.994493][ C2] do_softirq+0xa9/0xe0 [ 17.994494][ C2] [ 17.994495][ C2] [ 17.994495][ C2] ? __dev_queue_xmit+0x946/0x1b60 [ 17.994497][ C2] __local_bh_enable_ip+0x113/0x140 [ 17.994499][ C2] __dev_queue_xmit+0x95b/0x1b60 [ 17.994501][ C2] ? _copy_from_iter+0x1bb/0x1810 [ 17.994505][ C2] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 17.994507][ C2] ? net_dim+0x730/0xd70 [ 17.994509][ C2] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 17.994512][ C2] ? packet_release+0xc70/0xc70 [ 17.994514][ C2] packet_snd+0xfad/0x1990 [ 17.994517][ C2] ? tpacket_snd+0x19e0/0x19e0 [ 17.994518][ C2] ? __might_fault+0x97/0x140 [ 17.994522][ C2] ? __might_fault+0x97/0x140 [ 17.994523][ C2] ? __might_fault+0x97/0x140 [ 17.994524][ C2] __sys_sendto+0x2c9/0x400 [ 17.994526][ C2] ? __ia32_sys_getpeername+0xd0/0xd0 [ 17.994529][ C2] ? sock_ioctl+0x3cb/0x5f0 [ 17.994532][ C2] ? do_user_addr_fault+0x325/0xe30 [ 17.994536][ C2] __x64_sys_sendto+0xe4/0x1f0 [ 17.994537][ C2] ? trace_irq_enable.constprop.0+0x9b/0x180 [ 17.994541][ C2] ? lockdep_hardirqs_on+0x8c/0x130 [ 17.994542][ C2] ? do_syscall_64+0x82/0x590 [ 17.994543][ C2] do_syscall_64+0x117/0x590 [ 17.994544][ C2] ? trace_hardirqs_off+0xd/0x30 [ 17.994546][ C2] ? exc_page_fault+0xee/0x100 [ 17.994547][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 17.994549][ C2] RIP: 0033:0x7fab47eb508e [ 17.994552][ C2] 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 [ 17.994554][ C2] RSP: 002b:00007ffcd3233980 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 17.994556][ C2] RAX: ffffffffffffffda RBX: 0000562168458b22 RCX: 00007fab47eb508e [ 17.994558][ C2] RDX: 0000000000000062 RSI: 0000562168458b22 RDI: 0000000000000005 [ 17.994559][ C2] RBP: 00007ffcd3233990 R08: 00007ffcd32339e0 R09: 0000000000000014 [ 17.994560][ C2] R10: 0000000000000000 R11: 0000000000000202 R12: 0000562168458830 [ 17.994560][ C2] R13: 0000000000000062 R14: 0000000000000005 R15: 0000562168458830 [ 17.994563][ C2]