batman_adv: batadv0: Interface deactivated: batadv_slave_1
batman_adv: batadv0: Removing interface: batadv_slave_1
==================================================================
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
BUG: KASAN: null-ptr-deref on address           (null)
Read of size 24 by task kworker/u4:12/11519
CPU: 0 PID: 11519 Comm: kworker/u4:12 Not tainted 4.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_send_outstanding_bat_ogm_packet
 0000000000000000 ffff8800abf6f9e8 ffffffff82ddc472 0000000000000018
 ffff8800abf6fa78 ffff8800ac3c6100 ffff8800ad015080 0000000000000024
 ffff8800abf6fa68 ffffffff81706281 ffff8800ac3c6910 ffff8800ac3c6100
Call Trace:
 [<ffffffff82ddc472>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82ddc472>] dump_stack+0x136/0x1d4 lib/dump_stack.c:51
 [<ffffffff81706281>] kasan_report_error+0x431/0x520 mm/kasan/report.c:273
 [<ffffffff817066a4>] kasan_report+0x34/0x40 mm/kasan/report.c:298
 [<ffffffff817055ad>] check_memory_region_inline mm/kasan/kasan.c:285 [inline]
 [<ffffffff817055ad>] check_memory_region+0x13d/0x1a0 mm/kasan/kasan.c:299
 [<ffffffff817058e3>] memcpy+0x23/0x50 mm/kasan/kasan.c:334
 [<ffffffff864c4448>] batadv_tvlv_realloc_packet_buff net/batman-adv/main.c:891 [inline]
 [<ffffffff864c4448>] batadv_tvlv_container_ogm_append+0x158/0x470 net/batman-adv/main.c:926
 [<ffffffff8649790a>] batadv_iv_ogm_schedule+0x9ea/0xc70 net/batman-adv/bat_iv_ogm.c:947
 [<ffffffff864e3c31>] batadv_schedule_bat_ogm net/batman-adv/send.c:448 [inline]
 [<ffffffff864e3c31>] batadv_send_outstanding_bat_ogm_packet+0x2f1/0x410 net/batman-adv/send.c:636
 [<ffffffff8134700c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff81347f5a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff81358a99>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff865d720f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
==================================================================
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff82e0da86>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:51
PGD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 11519 Comm: kworker/u4:12 Tainted: G    B           4.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_send_outstanding_bat_ogm_packet
task: ffff8800ac3c6100 ti: ffff8800abf68000 task.ti: ffff8800abf68000
RIP: 0010:[<ffffffff82e0da86>]  [<ffffffff82e0da86>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:51
RSP: 0018:ffff8800abf6fac8  EFLAGS: 00010246
RAX: ffff8800ac140cf0 RBX: 0000000000000018 RCX: 0000000000000018
RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffff8800ac140cf0
RBP: ffff8800abf6fae8 R08: ffffed00158281a1 R09: ffffed00158281a1
R10: 0000000000000003 R11: ffffed00158281a0 R12: ffff8800ac140cf0
R13: 0000000000000000 R14: ffff8800ad015080 R15: 0000000000000024
FS:  0000000000000000(0000) GS:ffff88013bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000b7712000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81705905 0000000000000018 ffff8800b1638a00 ffff8800ad015078
 ffff8800abf6fb48 ffffffff864c4448 ffff8800b16391e0 0000000000000000
 ffff8800ac140cf0 ffff88000000003c ffff8800b16391f0 ffff8800b1638a00
Call Trace:
 [<ffffffff864c4448>] batadv_tvlv_realloc_packet_buff net/batman-adv/main.c:891 [inline]
 [<ffffffff864c4448>] batadv_tvlv_container_ogm_append+0x158/0x470 net/batman-adv/main.c:926
 [<ffffffff8649790a>] batadv_iv_ogm_schedule+0x9ea/0xc70 net/batman-adv/bat_iv_ogm.c:947
 [<ffffffff864e3c31>] batadv_schedule_bat_ogm net/batman-adv/send.c:448 [inline]
 [<ffffffff864e3c31>] batadv_send_outstanding_bat_ogm_packet+0x2f1/0x410 net/batman-adv/send.c:636
 [<ffffffff8134700c>] process_one_work+0x67c/0x14f0 kernel/workqueue.c:2096
 [<ffffffff81347f5a>] worker_thread+0xda/0xf10 kernel/workqueue.c:2230
 [<ffffffff81358a99>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff865d720f>] ret_from_fork+0x1f/0x40 arch/x86/entry/entry_64.S:389
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  [<ffffffff82e0da86>] memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:50
 RSP <ffff8800abf6fac8>
CR2: 0000000000000000
---[ end trace a0ce0cc2e213e5eb ]---