RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003fd R14: 00000000004c551d R15: 0000000000000008
IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
BUG: unable to handle kernel NULL pointer dereference at 0000000000000120
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IP: set_bit arch/x86/include/asm/bitops.h:81 [inline]
IP: cpumask_set_cpu include/linux/cpumask.h:283 [inline]
IP: blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171
PGD a5e7f067 P4D a5e7f067 PUD a6690067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7700 Comm: syz-executor.4 Not tainted 4.14.194-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a935c580 task.stack: ffff888082020000
RIP: 0010:set_bit arch/x86/include/asm/bitops.h:81 [inline]
RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:283 [inline]
RIP: 0010:blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171
RSP: 0018:ffff8880820279e0 EFLAGS: 00010293
RAX: ffff8880a433cf48 RBX: 0000000000000007 RCX: ffffe8ffffd33b80
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
RBP: ffff888082027a58 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880a433cf40 R11: ffff8880a4153040 R12: ffff8880a42fa580
R13: fffffbfff1164fee R14: ffff8880a3c67030 R15: dffffc0000000000
FS:  00007f11e6bb9700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000120 CR3: 00000000a660f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blk_mq_queue_reinit block/blk-mq.c:2512 [inline]
 __blk_mq_update_nr_hw_queues block/blk-mq.c:2750 [inline]
 blk_mq_update_nr_hw_queues+0x219/0x390 block/blk-mq.c:2760
 nbd_start_device+0x1b6/0xc50 drivers/block/nbd.c:1192
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
 nbd_start_device_ioctl drivers/block/nbd.c:1243 [inline]
 __nbd_ioctl drivers/block/nbd.c:1325 [inline]
 nbd_ioctl+0x1ae/0xad0 drivers/block/nbd.c:1365
batman_adv: batadv0: Interface activated: batadv_slave_1
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x7d2/0x1770 block/ioctl.c:594
device veth0_vlan entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
 block_ioctl+0xd7/0x130 fs/block_dev.c:1883
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
RIP: 0033:0x45b3c9
RSP: 002b:00007f11e6bb8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f11e6bb96d4 RCX: 000000000045b3c9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003fd R14: 00000000004c551d R15: 0000000000000008
Code: 0f 85 dd 05 00 00 8b 00 49 
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
8d 04 c2 48 89 c6 48 c1 ee 03 42 80 3c 3e 00 0f 85 98 05 00 00 41 83 f8 3f 48 8b 30 0f 87 f3 03 00 00 <f0> 4c 0f ab 8e 
IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
20 01 00 00 48 8d be 78 01 00 00 48 89 f8 48 c1 
RIP: set_bit arch/x86/include/asm/bitops.h:81 [inline] RSP: ffff8880820279e0
RIP: cpumask_set_cpu include/linux/cpumask.h:283 [inline] RSP: ffff8880820279e0
RIP: blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171 RSP: ffff8880820279e0
CR2: 0000000000000120
IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
---[ end trace 0a6e9750383ab523 ]---
device veth0_vlan entered promiscuous mode