general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 248 Comm: kworker/u4:4 Not tainted 5.5.0-rc6-next-20200116-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
RIP: 0010:batadv_iv_ogm_schedule_buff+0x3c9/0x12e0 net/batman-adv/bat_iv_ogm.c:814
Code: c1 ea 03 80 3c 02 00 0f 85 d5 0e 00 00 4d 8b a7 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 16 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 5a
RSP: 0018:ffffc90001597bb8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110151065a2
RDX: 0000000000000002 RSI: ffffffff87cb078d RDI: 0000000000000016
RBP: ffffc90001597ca8 R08: 0000000000000004 R09: ffff8880a8832d18
R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: 0000000000000000
R13: ffffc90001597c40 R14: 0000000000000006 R15: ffff888097d18800
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001535e90 CR3: 0000000099827000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:865 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:858 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x5da/0x7c0 net/batman-adv/bat_iv_ogm.c:1718
 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace b0e939c7b3a2a24b ]---
RIP: 0010:batadv_iv_ogm_schedule_buff+0x3c9/0x12e0 net/batman-adv/bat_iv_ogm.c:814
Code: c1 ea 03 80 3c 02 00 0f 85 d5 0e 00 00 4d 8b a7 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 16 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 5a
RSP: 0018:ffffc90001597bb8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110151065a2
RDX: 0000000000000002 RSI: ffffffff87cb078d RDI: 0000000000000016
RBP: ffffc90001597ca8 R08: 0000000000000004 R09: ffff8880a8832d18
R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: 0000000000000000
R13: ffffc90001597c40 R14: 0000000000000006 R15: ffff888097d18800
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001535e90 CR3: 0000000099827000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400