SELinux: failed to load policy
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BUG: KASAN: slab-out-of-bounds in erspan_build_header+0x392/0x3b0 net/ipv4/ip_gre.c:706
Read of size 2 at addr ffff88806a1430cb by task syz-executor.3/15848

CPU: 1 PID: 15848 Comm: syz-executor.3 Not tainted 4.14.113 #3
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+0x138/0x19c lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:440
 erspan_build_header+0x392/0x3b0 net/ipv4/ip_gre.c:706
 erspan_xmit net/ipv4/ip_gre.c:748 [inline]
 erspan_xmit+0x3ec/0x11c0 net/ipv4/ip_gre.c:725
 __netdev_start_xmit include/linux/netdevice.h:4033 [inline]
 netdev_start_xmit include/linux/netdevice.h:4042 [inline]
 packet_direct_xmit+0x438/0x640 net/packet/af_packet.c:269
 packet_snd net/packet/af_packet.c:2969 [inline]
 packet_sendmsg+0x31e1/0x5990 net/packet/af_packet.c:2994
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xd0/0x110 net/socket.c:656
 ___sys_sendmsg+0x70c/0x850 net/socket.c:2062
 __sys_sendmsg+0xb9/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2103
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c29
RSP: 002b:00007f2d41277c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d412786d4
R13: 00000000004c64a3 R14: 00000000004dadd8 R15: 00000000ffffffff

Allocated by task 7168:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15d/0x7a0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 __register_sysctl_table+0xc7/0xe50 fs/proc/proc_sysctl.c:1300
 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120
 __addrconf_sysctl_register+0x209/0x3e0 net/ipv6/addrconf.c:6404
 addrconf_sysctl_register net/ipv6/addrconf.c:6451 [inline]
 addrconf_sysctl_register+0xf9/0x1a0 net/ipv6/addrconf.c:6440
 ipv6_add_dev net/ipv6/addrconf.c:460 [inline]
 ipv6_add_dev+0x8e2/0xfb0 net/ipv6/addrconf.c:375
 addrconf_notify+0x614/0x1b40 net/ipv6/addrconf.c:3365
 notifier_call_chain+0x116/0x1b0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x56/0x70 net/core/dev.c:1671
 call_netdevice_notifiers net/core/dev.c:1687 [inline]
 register_netdevice+0x9d0/0xca0 net/core/dev.c:7694
 veth_newlink+0x403/0x900 drivers/net/veth.c:416
 rtnl_newlink+0xed2/0x1710 net/core/rtnetlink.c:2698
 rtnetlink_rcv_msg+0x3ed/0xb70 net/core/rtnetlink.c:4285
 netlink_rcv_skb+0x152/0x3c0 net/netlink/af_netlink.c:2432
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4297
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x466/0x780 net/netlink/af_netlink.c:1312
 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xd0/0x110 net/socket.c:656
 SYSC_sendto+0x206/0x310 net/socket.c:1763
 SyS_sendto+0x40/0x50 net/socket.c:1731
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88806a142a00
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1739 bytes inside of
 2048-byte region [ffff88806a142a00, ffff88806a143200)
The buggy address belongs to the page:
page:ffffea0001a85080 count:1 mapcount:0 mapping:ffff88806a142180 index:0xffff88806a142180 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff88806a142180 ffff88806a142180 0000000100000002
raw: ffffea0002203d20 ffffea000247b5a0 ffff8880aa800c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88806a142f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806a143000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806a143080: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff88806a143100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88806a143180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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