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BUG: corrupted list in ___neigh_create

Status: fixed on 2019/01/11 01:22
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+b354d1fb59091ea73c37@syzkaller.appspotmail.com
Fix commit: 8cc196d6ef86 neighbor: gc_list changes should be protected by table lock
First crash: 2210d, last: 2205d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH net-next] neighbor: gc_list changes should be protected by table lock 2 (2) 2018/12/11 01:42
[PATCH v2 net-next] neighbor: Improve garbage collection 6 (6) 2018/12/10 14:38
BUG: corrupted list in ___neigh_create 0 (1) 2018/12/10 05:41

Sample crash report:
list_add corruption. prev->next should be next (ffffffff89fd1320), but was ffff8881cab96730. (prev=ffff8881ca587470).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7045 Comm: sh Not tainted 4.20.0-rc6+ #337
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
Code: e8 d0 6e d2 fd 0f 0b 48 89 d9 48 c7 c7 e0 da 60 88 e8 bf 6e d2 fd 0f 0b 48 89 f1 48 c7 c7 60 db 60 88 48 89 de e8 ab 6e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
RSP: 0018:ffff8881dae06dc0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff89fd1320 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165e485 RDI: 0000000000000005
RBP: ffff8881dae06dd8 R08: ffff8881c53ec6c0 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881caba8270
R13: ffff8881caba8000 R14: ffffffff89fd10e0 R15: ffffffff89fd1370
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f027bb8ba8c CR3: 00000001d22ba000 CR4: 00000000001406f0
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
8021q: adding VLAN 0 to HW filter on device bond0
 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]
 mld_sendpack+0xad5/0xfa0 net/ipv6/mcast.c:1683
 mld_send_cr net/ipv6/mcast.c:1979 [inline]
 mld_ifc_timer_expire+0x447/0x8a0 net/ipv6/mcast.c:2478
 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682
8021q: adding VLAN 0 to HW filter on device bond0
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695
 __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
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline]
RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:22 [inline]
RIP: 0010:lock_page_memcg+0x12f/0x350 mm/memcontrol.c:1871
Code: eb 03 4c 01 e3 48 c1 e8 03 48 89 85 70 ff ff ff 4d 8d b7 80 06 00 00 be 04 00 00 00 4c 89 f7 e8 07 19 f9 ff 4c 89 f1 c6 03 04 <48> c1 e9 03 42 0f b6 34 21 4c 89 f1 83 e1 07 83 c1 03 40 38 f1 7c
RSP: 0018:ffff8881cc98ec58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffed103b348e41 RBX: ffffed1039931d94 RCX: ffff8881d9a47200
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881d9a47200
RBP: ffff8881cc98ed08 R08: ffffed103b348e41 R09: ffffed103b348e40
R10: ffffed103b348e40 R11: ffff8881d9a47203 R12: dffffc0000000000
R13: ffffea00076b0a40 R14: ffff8881d9a47200 R15: ffff8881d9a46b80
 page_remove_file_rmap mm/rmap.c:1215 [inline]
 page_remove_rmap+0x855/0x1a30 mm/rmap.c:1300
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device bond0
 zap_pte_range mm/memory.c:1091 [inline]
 zap_pmd_range mm/memory.c:1193 [inline]
 zap_pud_range mm/memory.c:1222 [inline]
 zap_p4d_range mm/memory.c:1243 [inline]
 unmap_page_range+0x11c7/0x2930 mm/memory.c:1264
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
 unmap_single_vma+0x19b/0x310 mm/memory.c:1309
 unmap_vmas+0x125/0x200 mm/memory.c:1339
 exit_mmap+0x2be/0x590 mm/mmap.c:3145
 __mmput kernel/fork.c:1045 [inline]
 mmput+0x247/0x610 kernel/fork.c:1066
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0xe74/0x26d0 kernel/exit.c:854
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
 do_group_exit+0x177/0x440 kernel/exit.c:970
 __do_sys_exit_group kernel/exit.c:981 [inline]
 __se_sys_exit_group kernel/exit.c:979 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f137e4f41e8
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 19 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 f7 d8 64 41 89 01
RSP: 002b:00007fff971fe058 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f137e4f41e8
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffffa8
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000040247c
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
R13: 00007fff971fe320 R14: 0000000000000000 R15: 0000000000000000
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
Modules linked in:
---[ end trace da68acb346ba5eee ]---
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
Code: e8 d0 6e d2 fd 0f 0b 48 89 d9 48 c7 c7 e0 da 60 88 e8 bf 6e d2 fd 0f 0b 48 89 f1 48 c7 c7 60 db 60 88 48 89 de e8 ab 6e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
RSP: 0018:ffff8881dae06dc0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff89fd1320 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165e485 RDI: 0000000000000005
RBP: ffff8881dae06dd8 R08: ffff8881c53ec6c0 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881caba8270
R13: ffff8881caba8000 R14: ffffffff89fd10e0 R15: ffffffff89fd1370
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f027bb8ba8c CR3: 00000001d22ba000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (706):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/12/11 07:14 net-next-old d8ed257f313f 4093e33b .config console log report syz C ci-upstream-net-kasan-gce
2018/12/10 20:13 net-next-old 4cc1feeb6ffc 6565f24d .config console log report syz C ci-upstream-net-kasan-gce
2018/12/09 21:55 net-next-old a60956ed72f7 979179d6 .config console log report syz C ci-upstream-net-kasan-gce
2018/12/09 03:42 net-next-old 97ef7b4c5501 c7918378 .config console log report syz C ci-upstream-net-kasan-gce
2018/12/13 03:42 linux-next 14cf8c1d5b90 02613a41 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/12/12 08:19 linux-next 14cf8c1d5b90 7795ae03 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/12/12 04:30 linux-next 14cf8c1d5b90 7795ae03 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/12/11 17:39 linux-next 14cf8c1d5b90 7795ae03 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/12/10 20:55 linux-next 14cf8c1d5b90 6565f24d .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/12/10 16:56 net-next-old 4cc1feeb6ffc 6565f24d .config console log report syz ci-upstream-net-kasan-gce
2018/12/10 00:15 net-next-old a60956ed72f7 96cc4c50 .config console log report syz ci-upstream-net-kasan-gce
2018/12/09 20:25 net-next-old a60956ed72f7 979179d6 .config console log report syz ci-upstream-net-kasan-gce
2018/12/09 10:12 net-next-old 97ef7b4c5501 c7918378 .config console log report syz ci-upstream-net-kasan-gce
2018/12/09 08:57 net-next-old 97ef7b4c5501 c7918378 .config console log report syz ci-upstream-net-kasan-gce
2018/12/09 04:57 net-next-old 97ef7b4c5501 c7918378 .config console log report syz ci-upstream-net-kasan-gce
2018/12/08 22:44 net-next-old 83af01ba1c2d 60562a1d .config console log report syz ci-upstream-net-kasan-gce
2018/12/11 10:31 linux-next 14cf8c1d5b90 4093e33b .config console log report syz ci-upstream-linux-next-kasan-gce-root
2018/12/11 10:51 net-next-old d8ed257f313f 4093e33b .config console log report ci-upstream-net-kasan-gce
2018/12/08 12:19 net-next-old 83af01ba1c2d 60562a1d .config console log report ci-upstream-net-kasan-gce
2018/12/13 06:22 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 06:08 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 05:05 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 03:55 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 03:22 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 01:54 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/13 00:39 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 23:18 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 22:53 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 21:45 linux-next 14cf8c1d5b90 02613a41 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 20:32 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 19:45 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 18:30 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 17:24 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 17:09 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 15:57 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 14:32 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 13:47 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 12:36 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 11:35 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 10:57 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 09:55 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 09:42 linux-next 14cf8c1d5b90 c3b10a5d .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 08:17 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 06:51 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 05:45 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 05:32 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 03:19 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 02:17 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/12 00:14 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 22:39 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 21:51 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 20:37 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 19:27 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 17:42 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 17:31 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 16:11 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 14:52 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 13:34 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 12:53 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/11 11:51 linux-next 14cf8c1d5b90 7795ae03 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.