audit: type=1804 audit(1586563630.708:19): pid=8427 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir313411876/syzkaller.Ssvwtx/19/file0/bus" dev="sda1" ino=15849 res=1
Illegal XDP return value 2765283967, expect packet loss!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at net/core/filter.c:3649 bpf_warn_invalid_xdp_action net/core/filter.c:3649 [inline]
WARNING: CPU: 1 PID: 0 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: 0 Comm: swapper/1 Not tainted 4.14.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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: 0000000000000038 RBX: 00000000a4d2e27f RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff86ac07e0 RDI: ffffed1015d60e96
RBP: ffffffff8738d300 R08: 0000000000000038 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000a4d2e27f
R13: 0000000000000000 R14: ffff88808bdfcf46 R15: ffff88808bdfcf04
 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
FAT-fs (loop0): bogus number of reserved sectors
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761
FAT-fs (loop0): Can't find a valid FAT filesystem
 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
 </IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffff8880a989fee0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd4 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880a988abbc
RBP: ffffffff87d16690 R08: 1ffffffff1124101 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1015311468
R13: ffff8880a988a340 R14: 0000000000000000 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
 default_idle+0x47/0x370 arch/x86/kernel/process.c:566
 cpuidle_idle_call kernel/sched/idle.c:156 [inline]
 do_idle+0x250/0x3c0 kernel/sched/idle.c:246
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351
 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Kernel Offset: disabled
Rebooting in 86400 seconds..