RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
kobject_add_internal failed for brport (error: -12 parent: team_slave)
WARNING: CPU: 0 PID: 6676 at lib/kobject.c:242 kobject_add_internal+0x3f6/0xbc0 lib/kobject.c:240
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 6676 Comm: syz-executor2 Not tainted 4.16.0+ #288
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1a7/0x27d lib/dump_stack.c:53
 panic+0x1f8/0x42c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
RIP: 0010:kobject_add_internal+0x3f6/0xbc0 lib/kobject.c:240
RSP: 0018:ffff88018e47f4b0 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: ffff8801b99377f8 RCX: ffffffff815b324e
RDX: 0000000000040000 RSI: ffffc9000262b000 RDI: 1ffff10031c8fe1b
RBP: ffff88018e47f5a8 R08: 1ffff10031c8fddd R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff10031c8fe9c
R13: 00000000fffffff4 R14: ffff8801b62388e8 R15: ffff8801b80c3800
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xf9/0x150 lib/kobject.c:436
 br_add_if+0x79a/0x1a70 net/bridge/br_if.c:533
 add_del_if+0xf4/0x140 net/bridge/br_ioctl.c:101
 br_dev_ioctl+0xa2/0xc0 net/bridge/br_ioctl.c:396
 dev_ifsioc+0x333/0x9b0 net/core/dev_ioctl.c:334
 dev_ioctl+0x176/0xbe0 net/core/dev_ioctl.c:500
 sock_do_ioctl+0x1ba/0x390 net/socket.c:981
 compat_sock_ioctl_trans net/socket.c:3187 [inline]
 compat_sock_ioctl+0x9e7/0x1c10 net/socket.c:3212
 C_SYSC_ioctl fs/compat_ioctl.c:1461 [inline]
 compat_SyS_ioctl+0x151/0x2a30 fs/compat_ioctl.c:1407
 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f81c99
RSP: 002b:00000000f5f7d0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00000000000089a2
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..