IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
------------[ cut here ]------------
kernel BUG at fs/f2fs/node.c:1069!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
CPU: 1 PID: 9414 Comm: syz-executor.3 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
task: ffff88804ffb6640 task.stack: ffff88804ffb8000
RIP: 0010:new_node_page+0xd1d/0x1180 fs/f2fs/node.c:1069
RSP: 0018:ffff88804ffbf410 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88804ffbf6a0 RCX: ffffc9000860f000
RDX: 0000000000000dba RSI: ffffffff82cb436d RDI: ffff8880b507c558
RBP: ffff88809768a280 R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea000262e240
R13: 00000000000007f9 R14: ffff88804ffbf458 R15: 0000000000000001
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
FS:  00007f74f756e700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
CR2: 0000001b2f424000 CR3: 00000000989f3000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 get_dnode_of_data+0x8fb/0x1ca0 fs/f2fs/node.c:633
 f2fs_reserve_block+0x49/0x6c0 fs/f2fs/data.c:604
 get_new_data_page+0xe6/0x1310 fs/f2fs/data.c:767
 f2fs_add_regular_entry+0x42a/0xfb0 fs/f2fs/dir.c:544
 __f2fs_do_add_link+0x255/0x2f0 fs/f2fs/dir.c:608
 __f2fs_add_link+0x304/0x4e0 fs/f2fs/dir.c:649
 f2fs_add_link fs/f2fs/f2fs.h:2501 [inline]
 f2fs_create+0x454/0x710 fs/f2fs/namei.c:197
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 lookup_open+0x77a/0x1750 fs/namei.c:3241
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
 do_last fs/namei.c:3334 [inline]
 path_openat+0xe08/0x2970 fs/namei.c:3571
 do_filp_open+0x179/0x3c0 fs/namei.c:3605
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f74f8ffc0f9
RSP: 002b:00007f74f756e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f74f911bf80 RCX: 00007f74f8ffc0f9
RDX: 0000000000000000 RSI: 0000000000143142 RDI: 0000000020002000
RBP: 00007f74f9057ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2378edbf R14: 00007f74f756e300 R15: 0000000000022000
Code: 00 44 89 ad 78 04 00 00 be 01 00 00 00 48 89 ef e8 
batman_adv: batadv0: Interface activated: batadv_slave_1
99 a3 f7 ff e9 ea fc ff ff 49 c7 c4 ff ff ff ff e9 de fc ff ff e8 43 13 8a fe <0f> 0b 48 89 44 24 10 e8 37 13 8a fe 48 8b 44 24 10 4c 8d 70 ff 
RIP: new_node_page+0xd1d/0x1180 fs/f2fs/node.c:1069 RSP: ffff88804ffbf410
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
---[ end trace 1a6b11483d42cbbb ]---
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready