batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
------------[ cut here ]------------
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
WARNING: CPU: 1 PID: 9345 at fs/inode.c:966 unlock_new_inode+0x9a/0xc0 fs/inode.c:966
Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 1 PID: 9345 Comm: syz-executor.3 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
Call Trace:
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x21d/0x451 kernel/panic.c:247
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
 __warn+0xdf/0x1e0 kernel/panic.c:603
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
batman_adv: batadv0: Interface activated: batadv_slave_1
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:unlock_new_inode+0x9a/0xc0 fs/inode.c:966
RSP: 0018:ffff888051157c40 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff888053cfa2c0 RCX: ffffc90005e03000
RDX: 00000000000003b2 RSI: ffffffff818ce3ea RDI: ffff888053cfa34c
RBP: 0000000000000000 R08: ffffffff8b9c7d90 R09: 0000000000040637
R10: ffff888051148a68 R11: ffff888051148140 R12: ffff888053cfa398
R13: ffff888053cfa348 R14: ffff88805117abf8 R15: ffff88805117a8c0
 nilfs_new_inode+0x637/0x860 fs/nilfs2/inode.c:429
 nilfs_mknod fs/nilfs2/namei.c:121 [inline]
 nilfs_mknod+0xd9/0x210 fs/nilfs2/namei.c:112
 vfs_mknod+0x40b/0x680 fs/namei.c:3759
 SYSC_mknodat fs/namei.c:3815 [inline]
 SyS_mknodat+0x230/0x470 fs/namei.c:3783
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fabb20a50f9
RSP: 002b:00007fabb0617168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007fabb21c4f80 RCX: 00007fabb20a50f9
RDX: 0000000000001000 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007fabb2100ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd45e0adff R14: 00007fabb0617300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..