IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
==================================================================
BUG: KASAN: use-after-free in erspan_build_header+0x392/0x3b0 net/ipv4/ip_gre.c:706
Read of size 2 at addr ffff888096864a4b by task syz-executor990/7169

CPU: 1 PID: 7169 Comm: syz-executor990 Not tainted 4.14.111 #1
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: 0033:0x441989
RSP: 002b:00007ffdccf778f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441989
RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000003
RBP: 00000000004a9070 R08: 0000000001bbbbbb R09: 0000000001bbbbbb
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402ed0
R13: 0000000000402f60 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 3896:
 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
 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc+0x12e/0x780 mm/slab.c:3552
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 fill_pool lib/debugobjects.c:110 [inline]
 __debug_object_init+0x5b8/0x8e0 lib/debugobjects.c:341
 debug_object_init lib/debugobjects.c:393 [inline]
 debug_object_activate+0x277/0x460 lib/debugobjects.c:474
 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline]
 __call_rcu.constprop.0+0x35/0x820 kernel/rcu/tree.c:3050
 call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:730
 file_free fs/file_table.c:56 [inline]
 __fput+0x458/0x7a0 fs/file_table.c:227
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x119/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
 do_syscall_64+0x4a9/0x630 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 25:
 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_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kmem_cache_free+0x83/0x2b0 mm/slab.c:3758
 free_obj_work+0x233/0x6d0 lib/debugobjects.c:207
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

The buggy address belongs to the object at ffff888096864a48
 which belongs to the cache debug_objects_cache of size 40
The buggy address is located 3 bytes inside of
 40-byte region [ffff888096864a48, ffff888096864a70)
The buggy address belongs to the page:
page:ffffea00025a1900 count:1 mapcount:0 mapping:ffff888096864000 index:0xffff888096864fb9
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff888096864000 ffff888096864fb9 0000000100000004
raw: ffffea00023d6ba0 ffffea00029760a0 ffff8880aa810dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888096864900: fb fb fb fb fc fc fb fb fb fb fb fc fc fb fb fb
 ffff888096864980: fb fb fc fc fb fb fb fb fb fc fc fb fb fb fb fb
>ffff888096864a00: fc fc fb fb fb fb fb fc fc fb fb fb fb fb fc fc
                                              ^
 ffff888096864a80: fb fb fb fb fb fc fc fb fb fb fb fb fc fc fb fb
 ffff888096864b00: fb fb fb fc fc fb fb fb fb fb fc fc fb fb fb fb
==================================================================