batman_adv: batadv0: Interface deactivated: veth3
batman_adv: batadv0: Removing interface: veth3
batman_adv: batadv0: Interface deactivated: veth5
batman_adv: batadv0: Removing interface: veth5
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: use-after-free in batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:717 [inline]
BUG: KASAN: use-after-free in batadv_iv_ogm_queue_add+0x2c2/0xf80 net/batman-adv/bat_iv_ogm.c:813
Read of size 60 at addr ffff88808b3ad780 by task kworker/u4:4/2289

CPU: 1 PID: 2289 Comm: kworker/u4:4 Not tainted 4.14.149 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
protocol 88fb is buggy, dev hsr_slave_0
Call Trace:
protocol 88fb is buggy, dev hsr_slave_1
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x197 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+0xa9/0x2af mm/kasan/report.c:393
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
 memcpy+0x24/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:347 [inline]
 batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:717 [inline]
 batadv_iv_ogm_queue_add+0x2c2/0xf80 net/batman-adv/bat_iv_ogm.c:813
 batadv_iv_ogm_schedule+0x9c5/0xd20 net/batman-adv/bat_iv_ogm.c:982
 batadv_iv_send_outstanding_bat_ogm_packet+0x4a1/0x680 net/batman-adv/bat_iv_ogm.c:1809
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Allocated by task 2289:
 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]
 batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:288 [inline]
 batadv_tvlv_container_ogm_append+0x12b/0x480 net/batman-adv/tvlv.c:329
 batadv_iv_ogm_schedule+0xafe/0xd20 net/batman-adv/bat_iv_ogm.c:945
 batadv_iv_send_outstanding_bat_ogm_packet+0x4a1/0x680 net/batman-adv/bat_iv_ogm.c:1809
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Freed by task 15464:
 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]
 kfree+0xcc/0x270 mm/slab.c:3815
 batadv_iv_ogm_iface_disable+0x39/0x80 net/batman-adv/bat_iv_ogm.c:393
 batadv_hardif_disable_interface.cold+0x4df/0x70d net/batman-adv/hard-interface.c:836
 batadv_softif_destroy_netlink+0xa9/0x130 net/batman-adv/soft-interface.c:1134
 default_device_exit_batch+0x22c/0x3d0 net/core/dev.c:8723
 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:145
 cleanup_net+0x3ba/0x880 net/core/net_namespace.c:484
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

The buggy address belongs to the object at ffff88808b3ad780
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff88808b3ad780, ffff88808b3ad7c0)
The buggy address belongs to the page:
page:ffffea00022ceb40 count:1 mapcount:0 mapping:ffff88808b3ad000 index:0xffff88808b3ad300
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff88808b3ad000 ffff88808b3ad300 0000000100000018
raw: ffffea00025c8120 ffffea00029749e0 ffff8880aa800340 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808b3ad680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88808b3ad700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88808b3ad780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88808b3ad800: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff88808b3ad880: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
==================================================================