audit: type=1800 audit(1544625130.620:84): pid=15188 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor1" name="file0" dev="loop1" ino=72 res=0
list_add corruption. next->prev should be prev (ffff8881b882ddb0), but was ffff8881c23fe6f0. (next=ffffffff8a1dca60).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:25!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6230 Comm: syz-executor5 Not tainted 4.20.0-rc6-next-20181210+ #164
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
Code: e5 80 88 e8 11 1f d2 fd 0f 0b 48 89 de 48 c7 c7 60 e5 80 88 e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd <0f> 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd 0f 0b
RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881dad06cf8 R08: ffff8881874be300 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff8881bf044b70
R13: ffff8881bf044900 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0
FS:  0000000000f6e940(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001ac37d0 CR3: 000000018749e000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 neigh_alloc net/core/neighbour.c:395 [inline]
 ___neigh_create+0x14b7/0x2600 net/core/neighbour.c:553
 __neigh_create+0x30/0x40 net/core/neighbour.c:640
 ip6_finish_output2+0xa64/0x2940 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x58c/0xc60 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0x1005/0x1560 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6e0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3840
 call_timer_fn+0x272/0x920 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers+0x7e5/0xc70 kernel/time/timer.c:1681
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694
 __do_softirq+0x308/0xb7e kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x17f/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:wait_consider_task+0x260/0x3bb0 kernel/exit.c:1330
Code: c7 85 f0 fd ff ff 00 00 00 00 e8 4b bf 35 00 31 c0 b9 07 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 03 95 e8 fd ff ff 48 89 d7 <f3> 48 ab 8b 85 f0 fd ff ff 48 8b 75 d0 65 48 33 34 25 28 00 00 00
RSP: 0018:ffff8881874c7788 EFLAGS: 00010286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000005
RDX: ffffed1030e98f03 RSI: ffffffff814a38c5 RDI: ffffed1030e98f13
RBP: ffff8881874c7a20 R08: ffff8881874be300 R09: fffffbfff12c1218
R10: fffffbfff12c1218 R11: ffffffff896090c3 R12: 0000000000000000
R13: ffff8881874c7c2c R14: ffff8881b4a44540 R15: ffff8881874c7c28
 do_wait_thread kernel/exit.c:1445 [inline]
 do_wait+0x49f/0xb90 kernel/exit.c:1516
 kernel_wait4+0x247/0x3f0 kernel/exit.c:1659
 __do_sys_wait4+0x137/0x150 kernel/exit.c:1671
 __se_sys_wait4 kernel/exit.c:1667 [inline]
 __x64_sys_wait4+0x97/0xf0 kernel/exit.c:1667
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x41135a
Code: 0f 83 1a 17 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 5e 4c 63 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007ffc27171ec8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 000000000005ebb7 RCX: 000000000041135a
RDX: 0000000040000001 RSI: 00007ffc27171f00 RDI: ffffffffffffffff
RBP: 000000000000033e R08: 0000000000000001 R09: 0000000000f6e940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000005eb9c R14: 00000000000000cf R15: 0000000000000005
Modules linked in:
---[ end trace 53ea351a8f9d6a38 ]---
RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
Code: e5 80 88 e8 11 1f d2 fd 0f 0b 48 89 de 48 c7 c7 60 e5 80 88 e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd <0f> 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd 0f 0b
RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881dad06cf8 R08: ffff8881874be300 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff8881bf044b70
R13: ffff8881bf044900 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0
FS:  0000000000f6e940(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001ac37d0 CR3: 000000018749e000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400