device veth0_macvtap entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
kasan: CONFIG_KASAN_INLINE enabled
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
device veth0_macvtap entered promiscuous mode
Modules linked in:
CPU: 1 PID: 9413 Comm: syz-executor.1 Not tainted 4.14.307-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
task: ffff888040c86040 task.stack: ffff888040c88000
RIP: 0010:vhost_umem_interval_tree_iter_first drivers/vhost/vhost.c:53 [inline]
RIP: 0010:vhost_del_umem_range drivers/vhost/vhost.c:977 [inline]
RIP: 0010:vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline]
RIP: 0010:vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline]
RIP: 0010:vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061
RSP: 0018:ffff888040c8fc00 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888040ca0740 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff857f16f5 RDI: ffff888040ca0800
device veth1_macvtap entered promiscuous mode
RBP: ffffed10081940f9 R08: 0000000000000000 R09: 0000000000000000
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
R10: 0000000000000002 R11: ffff888040c86040 R12: 0000000000000002
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11008191f87
FS:  00007fe8ca92c700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056287db3a160 CR3: 00000000b02d1000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 call_write_iter include/linux/fs.h:1780 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RIP: 0033:0x7fe8cc3ba0f9
RSP: 002b:00007fe8ca92c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe8cc4d9f80 RCX: 00007fe8cc3ba0f9
RDX: 0000000000000048 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007fe8cc415ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6e2dbdbf R14: 00007fe8ca92c300 R15: 0000000000022000
Code: 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0
ff 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
df 
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 c6 06 00 
batman_adv: batadv0: Interface activated: batadv_slave_0
00 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
4c 8b ab c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e9 48 c1 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
e9 03 <80> 3c 01 00 0f 85 8f 06 00 00 49 8b 6d 00 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
48 85 ed 0f 84 e4 03 
RIP: vhost_umem_interval_tree_iter_first drivers/vhost/vhost.c:53 [inline] RSP: ffff888040c8fc00
RIP: vhost_del_umem_range drivers/vhost/vhost.c:977 [inline] RSP: ffff888040c8fc00
RIP: vhost_process_iotlb_msg drivers/vhost/vhost.c:1048 [inline] RSP: ffff888040c8fc00
RIP: vhost_chr_write_iter drivers/vhost/vhost.c:1077 [inline] RSP: ffff888040c8fc00
RIP: vhost_chr_write_iter+0x873/0x1100 drivers/vhost/vhost.c:1061 RSP: ffff888040c8fc00
---[ end trace 46c27629ef15982e ]---
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!