audit: type=1804 audit(1587090066.225:67): pid=19550 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir041791855/syzkaller.BGRV7c/319/bus" dev="sda1" ino=16752 res=1 IPVS: set_ctl: invalid protocol: 0 172.30.0.6:0 Illegal XDP return value 416723863, expect packet loss! ------------[ cut here ]------------ WARNING: CPU: 1 PID: 19500 at net/core/filter.c:3649 bpf_warn_invalid_xdp_action net/core/filter.c:3649 [inline] WARNING: CPU: 1 PID: 19500 at net/core/filter.c:3649 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3645 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 19500 Comm: syz-executor.1 Not tainted 4.14.176-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+0x13e/0x194 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x2f/0x30 kernel/panic.c:547 report_bug+0x20a/0x248 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:963 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3649 [inline] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3645 RSP: 0018:ffff8880aeb07500 EFLAGS: 00010282 RAX: 0000000000000037 RBX: 0000000018d6b397 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff86ac07e0 RDI: ffffed1015d60e96 RBP: ffffffff8738d700 R08: 0000000000000037 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000018d6b397 R13: 0000000000000000 R14: ffff88808c621ac6 R15: ffff88808c621a84 netif_receive_generic_xdp net/core/dev.c:3959 [inline] do_xdp_generic.part.0+0x513/0x9e0 net/core/dev.c:4004 do_xdp_generic net/core/dev.c:4042 [inline] netif_rx_internal+0x330/0x800 net/core/dev.c:4042 dev_forward_skb+0x39/0x50 net/core/dev.c:1870 veth_xmit+0xf1/0x300 drivers/net/veth.c:114 __netdev_start_xmit include/linux/netdevice.h:4039 [inline] netdev_start_xmit include/linux/netdevice.h:4048 [inline] xmit_one net/core/dev.c:3009 [inline] dev_hard_start_xmit+0x186/0x890 net/core/dev.c:3025 __dev_queue_xmit+0x1d91/0x25c0 net/core/dev.c:3525 neigh_resolve_output net/core/neighbour.c:1369 [inline] neigh_resolve_output+0x50a/0x8b0 net/core/neighbour.c:1349 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0x992/0x2150 net/ipv6/ip6_output.c:120 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3765 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:preempt_count_equals kernel/sched/core.c:5975 [inline] RIP: 0010:___might_sleep+0x54/0x2b0 kernel/sched/core.c:6008 RSP: 0018:ffff888042357990 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff10279bc RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff88809108c3c0 RBP: ffffffff86e440c0 R08: 000000000002e5a4 R09: 0000000000000000 R10: ffff88809108c8c0 R11: ffff88809108c040 R12: 000000000000000a R13: 0000000080000000 R14: ffff88809108c040 R15: dffffc0000000000 __might_fault+0x9f/0x1b0 mm/memory.c:4581 _copy_from_user+0x27/0x100 lib/usercopy.c:10 copy_from_user include/linux/uaccess.h:147 [inline] copy_msghdr_from_user+0x7b/0x380 net/socket.c:1943 ___sys_recvmsg+0xf0/0x4d0 net/socket.c:2209 __sys_recvmmsg+0x1f3/0x620 net/socket.c:2329 SYSC_recvmmsg net/socket.c:2405 [inline] SyS_recvmmsg+0x125/0x140 net/socket.c:2394 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f0a59e24c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f0a59e256d4 RCX: 000000000045c889 RDX: fffffffffffffe86 RSI: 0000000020001a40 RDI: 0000000000000005 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000089c R14: 00000000004cb520 R15: 000000000076bf0c Kernel Offset: disabled Rebooting in 86400 seconds..