rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10500 ticks this GP) idle=5ea/1/0x4000000000000000 softirq=11519/11519 fqs=5226 (t=10502 jiffies g=14333 q=1899) NMI backtrace for cpu 0 CPU: 0 PID: 10055 Comm: syz-executor.2 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:342 print_cpu_stall kernel/rcu/tree_stall.h:625 [inline] check_cpu_stall kernel/rcu/tree_stall.h:700 [inline] rcu_pending kernel/rcu/tree.c:3922 [inline] rcu_sched_clock_irq.cold+0x3f1/0x74b kernel/rcu/tree.c:2641 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1420 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:filter_irq_stacks+0xb/0x50 lib/stackdepot.c:359 Code: 3b 90 cf fd e9 bd fe ff ff 4c 89 ef e8 ae 8f cf fd e9 8d fe ff ff cc cc cc cc cc cc cc cc cc 85 f6 89 f1 74 3f 41 89 f0 31 c0 <48> 8b 14 c7 89 c6 48 81 fa 00 01 40 89 72 0d 48 81 fa d0 0d 40 89 RSP: 0018:ffffc90000006ef8 EFLAGS: 00000216 RAX: 0000000000000019 RBX: ffff8881da441b40 RCX: 0000000000000040 RDX: ffffffff81653aa3 RSI: 0000000000000018 RDI: ffffc90000006f00 RBP: ffff8881da441c28 R08: 0000000000000040 R09: 0000000000000001 R10: fffff52000000dc6 R11: 0000000000086087 R12: 0000000000000a20 R13: 0000000000000a20 R14: 00000000ffffffff R15: 0000000000000000 kasan_save_stack+0x25/0x40 mm/kasan/common.c:39 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:431 [inline] __kasan_slab_alloc+0x84/0xa0 mm/kasan/common.c:464 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2954 [inline] kmem_cache_alloc_node+0x266/0x3e0 mm/slub.c:2990 __alloc_skb+0x20b/0x340 net/core/skbuff.c:413 alloc_skb include/linux/skbuff.h:1107 [inline] ip_frag_next+0x11e/0x9a0 net/ipv4/ip_output.c:706 ip_do_fragment+0x762/0x1450 net/ipv4/ip_output.c:903 ip_fragment.constprop.0+0x174/0x240 net/ipv4/ip_output.c:582 __ip_finish_output net/ipv4/ip_output.c:306 [inline] __ip_finish_output+0x2de/0x640 net/ipv4/ip_output.c:290 ip_finish_output+0x32/0x200 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:448 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x5a3/0x9c0 net/ipv4/ip_tunnel_core.c:82 geneve_xmit_skb drivers/net/geneve.c:971 [inline] geneve_xmit+0x1186/0x3440 drivers/net/geneve.c:1082 __netdev_start_xmit include/linux/netdevice.h:4944 [inline] netdev_start_xmit include/linux/netdevice.h:4958 [inline] xmit_one net/core/dev.c:3654 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3670 __dev_queue_xmit+0x2153/0x3150 net/core/dev.c:4246 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0x890/0x1700 net/ipv6/ip6_output.c:117 __ip6_finish_output net/ipv6/ip6_output.c:182 [inline] __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215 dst_output include/net/dst.h:448 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ndisc_send_skb+0xa99/0x1750 net/ipv6/ndisc.c:508 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3877 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9fb kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:163 [inline] RIP: 0010:unwind_next_frame+0x23b/0x1ce0 arch/x86/kernel/unwind_orc.c:443 Code: 8d 43 ff 39 c6 0f 83 bc 13 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 14 bd fd 8e 48 89 f9 48 c1 e9 03 0f b6 0c 01 <48> 89 f8 83 e0 07 83 c0 03 38 c8 7c 27 84 c9 74 23 48 89 54 24 30 RSP: 0018:ffffc9000bf86100 EFLAGS: 00000a02 RAX: dffffc0000000000 RBX: 1ffff920017f0c28 RCX: 0000000000000000 RDX: 0000000000060f1f RSI: 0000000000060f1f RDI: ffffffff8f15f990 RBP: 0000000000000001 R08: ffffffff8bff2660 R09: 0000000000000001 R10: fffff520017f0c46 R11: 0000000000086087 R12: ffffc9000bf86220 R13: ffffc9000bf8620d R14: ffffc9000bf861d8 R15: ffffffff870f1ff4 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:363 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:371 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1623 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1648 slab_free mm/slub.c:3208 [inline] kfree+0xeb/0x650 mm/slub.c:4274 skb_free_head net/core/skbuff.c:651 [inline] skb_release_data+0x627/0x750 net/core/skbuff.c:672 skb_release_all net/core/skbuff.c:726 [inline] __kfree_skb net/core/skbuff.c:740 [inline] consume_skb net/core/skbuff.c:896 [inline] consume_skb+0xc2/0x160 net/core/skbuff.c:890 netlink_broadcast_filtered+0x35c/0xdc0 net/netlink/af_netlink.c:1522 netlink_broadcast net/netlink/af_netlink.c:1544 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0x90/0x250 net/netlink/af_netlink.c:2545 rtmsg_fib+0x2e3/0x450 net/ipv4/fib_semantics.c:532 fib_table_delete+0x6a6/0xa40 net/ipv4/fib_trie.c:1751 fib_magic+0x321/0x540 net/ipv4/fib_frontend.c:1087 fib_del_ifaddr+0xc97/0x13c0 net/ipv4/fib_frontend.c:1295 fib_inetaddr_event+0xb4/0x2a0 net/ipv4/fib_frontend.c:1426 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 blocking_notifier_call_chain kernel/notifier.c:337 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:325 __inet_del_ifa+0x415/0xf70 net/ipv4/devinet.c:428 inet_del_ifa net/ipv4/devinet.c:465 [inline] inetdev_destroy net/ipv4/devinet.c:318 [inline] inetdev_event+0x671/0x15d0 net/ipv4/devinet.c:1598 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2121 call_netdevice_notifiers_mtu net/core/dev.c:2170 [inline] dev_set_mtu_ext+0x397/0x5a0 net/core/dev.c:8909 do_setlink+0x57e/0x3900 net/core/rtnetlink.c:2673 rtnl_group_changelink net/core/rtnetlink.c:3224 [inline] __rtnl_newlink+0xbe9/0x1710 net/core/rtnetlink.c:3378 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3488 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x84c/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f12c2e63188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf780891f R14: 00007f12c2e63300 R15: 0000000000022000