device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
batman_adv: batadv0: Interface deactivated: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_0
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:352 [inline]
BUG: KASAN: use-after-free in batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:550 [inline]
BUG: KASAN: use-after-free in batadv_iv_ogm_queue_add+0x326/0xe50 net/batman-adv/bat_iv_ogm.c:646
Read of size 60 at addr ffff888095c19f00 by task kworker/u4:0/7

CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.0.0-rc6-syzkaller #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
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x165/0x21a lib/dump_stack.c:113
 print_address_description.cold.3+0x9/0x211 mm/kasan/report.c:187
 kasan_report.cold.4+0x1b/0x37 mm/kasan/report.c:317
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x13c/0x1b0 mm/kasan/generic.c:191
 memcpy+0x23/0x50 mm/kasan/common.c:130
 memcpy include/linux/string.h:352 [inline]
 batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:550 [inline]
 batadv_iv_ogm_queue_add+0x326/0xe50 net/batman-adv/bat_iv_ogm.c:646
 batadv_iv_ogm_schedule+0xb47/0xe80 net/batman-adv/bat_iv_ogm.c:819
 batadv_iv_send_outstanding_bat_ogm_packet+0x4a2/0x790 net/batman-adv/bat_iv_ogm.c:1681
 process_one_work+0x7b9/0x15e0 kernel/workqueue.c:2173
 worker_thread+0x85/0xb60 kernel/workqueue.c:2319
 kthread+0x324/0x3e0 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 7:
 save_stack mm/kasan/common.c:73 [inline]
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc.part.0+0x66/0x100 mm/kasan/common.c:496
 __kasan_kmalloc.constprop.1+0xb5/0xc0 mm/kasan/common.c:477
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
 __do_kmalloc mm/slab.c:3711 [inline]
 __kmalloc+0x164/0x3e0 mm/slab.c:3720
 kmalloc include/linux/slab.h:550 [inline]
 batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:289 [inline]
 batadv_tvlv_container_ogm_append+0x16f/0x4b0 net/batman-adv/tvlv.c:330
 batadv_iv_ogm_schedule+0xc39/0xe80 net/batman-adv/bat_iv_ogm.c:782
 batadv_iv_send_outstanding_bat_ogm_packet+0x4a2/0x790 net/batman-adv/bat_iv_ogm.c:1681
 process_one_work+0x7b9/0x15e0 kernel/workqueue.c:2173
 worker_thread+0x85/0xb60 kernel/workqueue.c:2319
 kthread+0x324/0x3e0 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 7528:
 save_stack mm/kasan/common.c:73 [inline]
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x13c/0x220 mm/kasan/common.c:458
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
 __cache_free mm/slab.c:3487 [inline]
 kfree+0xcf/0x220 mm/slab.c:3806
 batadv_iv_ogm_iface_disable+0x34/0x70 net/batman-adv/bat_iv_ogm.c:232
 batadv_hardif_disable_interface.cold.9+0x712/0x107a net/batman-adv/hard-interface.c:883
 batadv_softif_destroy_netlink+0x94/0x100 net/batman-adv/soft-interface.c:1149
 default_device_exit_batch+0x239/0x3d0 net/core/dev.c:9674
 ops_exit_list.isra.0+0xd3/0x120 net/core/net_namespace.c:156
 cleanup_net+0x363/0x840 net/core/net_namespace.c:551
 process_one_work+0x7b9/0x15e0 kernel/workqueue.c:2173
 worker_thread+0x85/0xb60 kernel/workqueue.c:2319
 kthread+0x324/0x3e0 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff888095c19f00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff888095c19f00, ffff888095c19f40)
The buggy address belongs to the page:
page:ffffea0002570640 count:1 mapcount:0 mapping:ffff88812c3f6340 index:0xffff888095c19080
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00027e7d88 ffffea00022751c8 ffff88812c3f6340
raw: ffff888095c19080 ffff888095c19000 0000000100000016 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888095c19e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888095c19e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888095c19f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff888095c19f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888095c1a000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================