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 team0
==================================================================
BUG: KASAN: use-after-free in sock_i_ino+0x94/0xa0 net/core/sock.c:1921
Read of size 8 at addr ffff8801af000b70 by task syz-executor0/5017

CPU: 1 PID: 5017 Comm: syz-executor0 Not tainted 4.19.0-rc2-next-20180904+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 sock_i_ino+0x94/0xa0 net/core/sock.c:1921
 tipc_sk_fill_sock_diag+0x3be/0xdb0 net/tipc/socket.c:3316
 __tipc_add_sock_diag+0x22f/0x360 net/tipc/diag.c:62
 tipc_nl_sk_walk+0x122/0x1d0 net/tipc/socket.c:3250
 tipc_diag_dump+0x24/0x30 net/tipc/diag.c:73
 netlink_dump+0x519/0xd50 net/netlink/af_netlink.c:2233
 __netlink_dump_start+0x4f1/0x6f0 net/netlink/af_netlink.c:2329
 netlink_dump_start include/linux/netlink.h:213 [inline]
 tipc_sock_diag_handler_dump+0x28e/0x3d0 net/tipc/diag.c:91
 __sock_diag_cmd net/core/sock_diag.c:232 [inline]
 sock_diag_rcv_msg+0x31d/0x410 net/core/sock_diag.c:263
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454
 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:274
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2115
 __sys_sendmsg+0x11d/0x290 net/socket.c:2153
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fccc1937c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fccc19386d4 RCX: 0000000000457099
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4860 R14: 00000000004c8ebd R15: 0000000000000000

Allocated by task 5017:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x710 mm/slab.c:3554
 sock_alloc_inode+0x1d/0x260 net/socket.c:244
 alloc_inode+0x63/0x190 fs/inode.c:210
 new_inode_pseudo+0x71/0x1a0 fs/inode.c:903
 sock_alloc+0x41/0x270 net/socket.c:548
 __sock_create+0x175/0x940 net/socket.c:1240
 sock_create net/socket.c:1316 [inline]
 __sys_socket+0x106/0x260 net/socket.c:1346
 __do_sys_socket net/socket.c:1355 [inline]
 __se_sys_socket net/socket.c:1353 [inline]
 __x64_sys_socket+0x73/0xb0 net/socket.c:1353
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 5016:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x86/0x280 mm/slab.c:3756
 sock_destroy_inode+0x51/0x60 net/socket.c:272
 destroy_inode+0x159/0x200 fs/inode.c:267
 evict+0x5d5/0x990 fs/inode.c:575
 iput_final fs/inode.c:1547 [inline]
 iput+0x5fa/0xa00 fs/inode.c:1573
 dentry_unlink_inode+0x461/0x5e0 fs/dcache.c:374
 __dentry_kill+0x44c/0x7a0 fs/dcache.c:566
 dentry_kill+0xc9/0x5a0 fs/dcache.c:685
 dput.part.26+0x66b/0x7a0 fs/dcache.c:846
 dput+0x15/0x20 fs/dcache.c:828
 __fput+0x505/0xa80 fs/file_table.c:294
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801af000b00
 which belongs to the cache sock_inode_cache(17:syz0) of size 984
The buggy address is located 112 bytes inside of
 984-byte region [ffff8801af000b00, ffff8801af000ed8)
The buggy address belongs to the page:
page:ffffea0006bc0000 count:1 mapcount:0 mapping:ffff8801c5869780 index:0xffff8801af000ffd
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006bdff88 ffffea0006bdf948 ffff8801c5869780
raw: ffff8801af000ffd ffff8801af000200 0000000100000003 ffff8801b0f4abc0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801b0f4abc0

Memory state around the buggy address:
 ffff8801af000a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801af000a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801af000b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff8801af000b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801af000c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================