batman_adv: batadv0: Interface deactivated: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_0
==================================================================
batman_adv: batadv0: Interface deactivated: batadv_slave_1
batman_adv: batadv0: Removing interface: batadv_slave_1
BUG: KASAN: null-ptr-deref on address           (null)
Read of size 24 by task kworker/u4:4/2605
CPU: 1 PID: 2605 Comm: kworker/u4:4 Not tainted 4.8.0-rc4-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
 0000000000000000 ffff8801229cf9b8 ffffffff82d08572 ffff8801229cfa48
 ffff880126aa4280 0000000000000000 ffff88010c9523d0 0000000000000024
 ffff8801229cfa38 ffffffff8175fefa 0000000000000003 ffff88012250c3c0
Call Trace:
 [<ffffffff82d08572>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82d08572>] dump_stack+0x136/0x1d4 lib/dump_stack.c:51
 [<ffffffff8175fefa>] kasan_report_error+0x3da/0x490 mm/kasan/report.c:280
 [<ffffffff81760344>] kasan_report+0x34/0x40 mm/kasan/report.c:303
 [<ffffffff8175ecad>] check_memory_region_inline mm/kasan/kasan.c:285 [inline]
 [<ffffffff8175ecad>] check_memory_region+0x13d/0x1a0 mm/kasan/kasan.c:299
 [<ffffffff8175f143>] memcpy+0x23/0x50 mm/kasan/kasan.c:334
 [<ffffffff85ceb978>] batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:294 [inline]
 [<ffffffff85ceb978>] batadv_tvlv_container_ogm_append+0x158/0x470 net/batman-adv/tvlv.c:329
 [<ffffffff85c76934>] batadv_iv_ogm_schedule+0xa34/0xcc0 net/batman-adv/bat_iv_ogm.c:947
 [<ffffffff85c770ca>] batadv_iv_send_outstanding_bat_ogm_packet+0x4fa/0x8b0 net/batman-adv/bat_iv_ogm.c:1810
 [<ffffffff81395f1d>] process_one_work+0x67d/0x14f0 kernel/workqueue.c:2096
 [<ffffffff81396e6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff813a7819>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dd268f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:393
==================================================================
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff82d39d46>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:51
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
PGD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 2605 Comm: kworker/u4:4 Tainted: G    B           4.8.0-rc4-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
task: ffff88012250c3c0 task.stack: ffff8801229c8000
RIP: 0010:[<ffffffff82d39d46>]  [<ffffffff82d39d46>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:51
RSP: 0018:ffff8801229cfa98  EFLAGS: 00010246
RAX: ffff880126aa4280 RBX: 0000000000000018 RCX: 0000000000000018
RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffff880126aa4280
RBP: ffff8801229cfab8 R08: ffffed0024d54853 R09: ffffed0024d54853
R10: 0000000000000003 R11: ffffed0024d54852 R12: ffff880126aa4280
R13: 0000000000000000 R14: ffff88010c9523d0 R15: 0000000000000024
FS:  0000000000000000(0000) GS:ffff88012c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000108bf9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8175f165 0000000000000018 ffff880112382380 ffff88010c9523c8
 ffff8801229cfb18 ffffffff85ceb978 ffff880112382b68 0000000000000000
 ffff880126aa4280 ffff88010000003c ffff880112382b78 ffff880112382380
Call Trace:
 [<ffffffff85ceb978>] batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:294 [inline]
 [<ffffffff85ceb978>] batadv_tvlv_container_ogm_append+0x158/0x470 net/batman-adv/tvlv.c:329
 [<ffffffff85c76934>] batadv_iv_ogm_schedule+0xa34/0xcc0 net/batman-adv/bat_iv_ogm.c:947
 [<ffffffff85c770ca>] batadv_iv_send_outstanding_bat_ogm_packet+0x4fa/0x8b0 net/batman-adv/bat_iv_ogm.c:1810
 [<ffffffff81395f1d>] process_one_work+0x67d/0x14f0 kernel/workqueue.c:2096
 [<ffffffff81396e6a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff813a7819>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85dd268f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:393
Code: ff ff ff 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 
RIP  [<ffffffff82d39d46>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:50
 RSP <ffff8801229cfa98>
CR2: 0000000000000000
---[ end trace 6b40b5a1ce619741 ]---