rpcbind: RPC call returned error 22
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BUG: KASAN: slab-out-of-bounds in erspan_build_header+0x3bf/0x3d0 net/ipv4/ip_gre.c:698
Read of size 2 at addr ffff8801d7cac2cb by task syz-executor6/26314

CPU: 0 PID: 26314 Comm: syz-executor6 Not tainted 4.15.0-rc9+ #278
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+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
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:440
 erspan_build_header+0x3bf/0x3d0 net/ipv4/ip_gre.c:698
 erspan_xmit+0x3b8/0x13b0 net/ipv4/ip_gre.c:740
 __netdev_start_xmit include/linux/netdevice.h:4042 [inline]
 netdev_start_xmit include/linux/netdevice.h:4051 [inline]
 packet_direct_xmit+0x315/0x6b0 net/packet/af_packet.c:266
 packet_snd net/packet/af_packet.c:2943 [inline]
 packet_sendmsg+0x3aed/0x60b0 net/packet/af_packet.c:2968
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:648
 SYSC_sendto+0x361/0x5c0 net/socket.c:1729
 SyS_sendto+0x40/0x50 net/socket.c:1697
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452f19
RSP: 002b:00007f923e5dbc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452f19
RDX: 0000000000000000 RSI: 0000000020015f41 RDI: 0000000000000014
RBP: 000000000000034d R08: 0000000020015fec R09: 0000000000000014
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3fd8
R13: 00000000ffffffff R14: 00007f923e5dc6d4 R15: 0000000000000000

Allocated by task 3707:
 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
 __do_kmalloc_node mm/slab.c:3672 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3679
 kmalloc_node include/linux/slab.h:541 [inline]
 kvmalloc_node+0x64/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:541 [inline]
 kvzalloc include/linux/mm.h:549 [inline]
 alloc_netdev_mqs+0x16d/0xed0 net/core/dev.c:8134
 tun_set_iff drivers/net/tun.c:2274 [inline]
 __tun_chr_ioctl+0x138b/0x3dd0 drivers/net/tun.c:2533
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2782
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x29/0xa0

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d7ca8780
 which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 15179 bytes inside of
 16384-byte region [ffff8801d7ca8780, ffff8801d7cac780)
The buggy address belongs to the page:
page:ffffea00075f2a00 count:1 mapcount:0 mapping:ffff8801d7ca8780 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801d7ca8780 0000000000000000 0000000100000001
raw: ffffea0007584420 ffffea0007547e20 ffff8801dac02200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d7cac180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d7cac200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801d7cac280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff8801d7cac300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d7cac380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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