MPI: mpi too large (16392 bits)
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:344 [inline]
BUG: KASAN: slab-out-of-bounds in tcp_v6_syn_recv_sock+0x628/0x23a0 net/ipv6/tcp_ipv6.c:1144
Write of size 160 at addr ffff8801d4f469e0 by task syz-executor5/5823

CPU: 1 PID: 5823 Comm: syz-executor5 Not tainted 4.15.0-rc8+ #266
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+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x137/0x190 mm/kasan/kasan.c:267
 memcpy+0x37/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:344 [inline]
 tcp_v6_syn_recv_sock+0x628/0x23a0 net/ipv6/tcp_ipv6.c:1144
 tcp_get_cookie_sock+0x102/0x540 net/ipv4/syncookies.c:213
 cookie_v6_check+0x177d/0x2160 net/ipv6/syncookies.c:255
 tcp_v6_cookie_check net/ipv6/tcp_ipv6.c:1008 [inline]
 tcp_v6_do_rcv+0xe4d/0x11c0 net/ipv6/tcp_ipv6.c:1316
 tcp_v6_rcv+0x2309/0x2b60 net/ipv6/tcp_ipv6.c:1510
 ip6_input_finish+0x37e/0x17a0 net/ipv6/ip6_input.c:284
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip6_input+0xe9/0x560 net/ipv6/ip6_input.c:327
 dst_input include/net/dst.h:466 [inline]
 ip6_rcv_finish+0x1a9/0x7a0 net/ipv6/ip6_input.c:71
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208
 __netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4473
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4538
 process_backlog+0x203/0x740 net/core/dev.c:5217
 napi_poll net/core/dev.c:5615 [inline]
 net_rx_action+0x792/0x1910 net/core/dev.c:5681
 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1150
 </IRQ>
 do_softirq.part.19+0x14d/0x190 kernel/softirq.c:329
 do_softirq kernel/softirq.c:177 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:182
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:727 [inline]
 ip6_finish_output2+0xba6/0x23a0 net/ipv6/ip6_output.c:121
 ip6_finish_output+0x302/0x930 net/ipv6/ip6_output.c:146
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1eb/0x840 net/ipv6/ip6_output.c:163
 dst_output include/net/dst.h:460 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip6_xmit+0xd84/0x2090 net/ipv6/ip6_output.c:269
 inet6_csk_xmit+0x2fc/0x580 net/ipv6/inet6_connection_sock.c:139
 tcp_transmit_skb+0x1b1b/0x38c0 net/ipv4/tcp_output.c:1176
 tcp_write_xmit+0x686/0x51d0 net/ipv4/tcp_output.c:2367
 __tcp_push_pending_frames+0xa0/0x250 net/ipv4/tcp_output.c:2543
 tcp_send_fin+0x1b0/0xd20 net/ipv4/tcp_output.c:3087
 tcp_close+0xbe0/0xfc0 net/ipv4/tcp.c:2234
 inet_release+0xed/0x1c0 net/ipv4/af_inet.c:426
 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:432
 sock_release+0x8d/0x1e0 net/socket.c:602
 sock_close+0x16/0x20 net/socket.c:1131
 __fput+0x327/0x7e0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x199/0x270 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x9bb/0x1ad0 kernel/exit.c:865
 do_group_exit+0x149/0x400 kernel/exit.c:968
 get_signal+0x73f/0x16c0 kernel/signal.c:2335
 do_signal+0x90/0x1eb0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x9e/0xa0
RIP: 0033:0x452e39
RSP: 002b:00007f2d0addece8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000071c038 RCX: 0000000000452e39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071c038
RBP: 000000000071c038 R08: 000000000000059e R09: 000000000071c010
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007f2d0addf9c0 R15: 0000000000000002

Allocated by task 5823:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3544
 sk_prot_alloc+0x65/0x2a0 net/core/sock.c:1463
 sk_clone_lock+0x152/0x1570 net/core/sock.c:1649
 inet_csk_clone_lock+0x92/0x4f0 net/ipv4/inet_connection_sock.c:781
 tcp_create_openreq_child+0x9b/0x1b70 net/ipv4/tcp_minisocks.c:449
 tcp_v6_syn_recv_sock+0x22d/0x23a0 net/ipv6/tcp_ipv6.c:1123
 tcp_get_cookie_sock+0x102/0x540 net/ipv4/syncookies.c:213
 cookie_v6_check+0x177d/0x2160 net/ipv6/syncookies.c:255
 tcp_v6_cookie_check net/ipv6/tcp_ipv6.c:1008 [inline]
 tcp_v6_do_rcv+0xe4d/0x11c0 net/ipv6/tcp_ipv6.c:1316
 tcp_v6_rcv+0x2309/0x2b60 net/ipv6/tcp_ipv6.c:1510
 ip6_input_finish+0x37e/0x17a0 net/ipv6/ip6_input.c:284
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip6_input+0xe9/0x560 net/ipv6/ip6_input.c:327
 dst_input include/net/dst.h:466 [inline]
 ip6_rcv_finish+0x1a9/0x7a0 net/ipv6/ip6_input.c:71
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208
 __netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4473
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4538
 process_backlog+0x203/0x740 net/core/dev.c:5217
 napi_poll net/core/dev.c:5615 [inline]
 net_rx_action+0x792/0x1910 net/core/dev.c:5681
 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d4f46000
 which belongs to the cache TCP of size 2528
The buggy address is located 0 bytes to the right of
 2528-byte region [ffff8801d4f46000, ffff8801d4f469e0)
The buggy address belongs to the page:
page:ffffea000753d180 count:1 mapcount:0 mapping:ffff8801d4f46000 index:0xffff8801d4f47ffd compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801d4f46000 ffff8801d4f47ffd 0000000100000003
raw: ffffea000754e7a0 ffffea0006fa57a0 ffff8801d8783040 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d4f46880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d4f46900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d4f46980: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                       ^
 ffff8801d4f46a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d4f46a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================