IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready Illegal XDP return value 4294967274, expect packet loss! ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9797 at net/core/filter.c:3646 bpf_warn_invalid_xdp_action net/core/filter.c:3646 [inline] WARNING: CPU: 0 PID: 9797 at net/core/filter.c:3646 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3642 Kernel panic - not syncing: panic_on_warn set ... IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready CPU: 0 PID: 9797 Comm: syz-executor.3 Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3646 [inline] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3642 RSP: 0018:ffff8880ba406ec0 EFLAGS: 00010286 RAX: 0000000000000038 RBX: 1ffff11017480de1 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff878bbbc0 RDI: ffffed1017480dce RBP: ffffffff88562c80 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea R13: ffffc9001380c000 R14: 0000000000000000 R15: ffff8880af5db3c6 netif_receive_generic_xdp+0x554/0x950 net/core/dev.c:3956 do_xdp_generic.part.0+0x22/0xc0 net/core/dev.c:4001 do_xdp_generic net/core/dev.c:4039 [inline] netif_rx_internal+0x219/0x800 net/core/dev.c:4039 loopback_xmit+0x23a/0x580 drivers/net/loopback.c:91 __netdev_start_xmit include/linux/netdevice.h:4051 [inline] netdev_start_xmit include/linux/netdevice.h:4060 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 neigh_hh_output include/net/neighbour.h:490 [inline] neigh_output include/net/neighbour.h:498 [inline] ip_finish_output2+0x9db/0x1340 net/ipv4/ip_output.c:230 ip_finish_output+0x37c/0xc50 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip_output+0x1cd/0x510 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:470 [inline] ip_local_out+0x93/0x170 net/ipv4/ip_output.c:125 iptunnel_xmit+0x5cc/0x950 net/ipv4/ip_tunnel_core.c:91 geneve_xmit_skb drivers/net/geneve.c:867 [inline] geneve_xmit+0xea1/0x2c50 drivers/net/geneve.c:948 __netdev_start_xmit include/linux/netdevice.h:4051 [inline] netdev_start_xmit include/linux/netdevice.h:4060 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 neigh_resolve_output+0x4e5/0x870 net/core/neighbour.c:1369 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0xf48/0x1f10 net/ipv6/ip6_output.c:120 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3766 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__sanitizer_cov_trace_pc+0x28/0x50 kernel/kcov.c:93 RSP: 0018:ffff888045ad72c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000040000 RBX: ffff88803ef3b230 RCX: ffffc9000a932000 RDX: 0000000000040000 RSI: ffffffff81b9b30b RDI: ffff8880a464c86c RBP: ffff88803ef3b040 R08: 000000005db77a61 R09: 00000000000404bf R10: ffff888045abeb58 R11: 0000000000000000 R12: ffff888048f7a100 R13: ffff8880a464c7c0 R14: ffff8880a464cd88 R15: ffff888045ad7340 ext4_chksum fs/ext4/ext4.h:2070 [inline] ext4_inode_csum+0x3cb/0x850 fs/ext4/inode.c:69 ext4_inode_csum_set+0x13c/0x320 fs/ext4/inode.c:115 ext4_do_update_inode fs/ext4/inode.c:5236 [inline] ext4_mark_iloc_dirty+0x151e/0x26a0 fs/ext4/inode.c:5783 ext4_mark_inode_dirty+0x1d3/0x7a0 fs/ext4/inode.c:5977 ext4_da_write_end+0x6af/0x8e0 fs/ext4/inode.c:3198 generic_perform_write+0x268/0x420 mm/filemap.c:3066 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1778 [inline] do_iter_readv_writev+0x4cf/0x5f0 fs/read_write.c:675 do_iter_write+0x152/0x550 fs/read_write.c:954 vfs_iter_write+0x70/0xa0 fs/read_write.c:967 iter_file_splice_write+0x52b/0xa90 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665d9 RSP: 002b:00007fb91822f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001c500 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd1e4caeaf R14: 00007fb91822f300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..