------------[ cut here ]------------
kobject_add_internal failed for brport (error: -12 parent: team_slave_0)
WARNING: CPU: 0 PID: 7281 at lib/kobject.c:242 kobject_add_internal+0x42c/0xba0 lib/kobject.c:240
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7281 Comm: syz-executor5 Not tainted 4.16.0+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 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+0x42c/0xba0 lib/kobject.c:240
RSP: 0018:ffff88018a9cf560 EFLAGS: 00010282
RAX: 0000000000000048 RBX: ffff8801ce9c6178 RCX: ffffc900064db000
RDX: 0000000000040000 RSI: ffffffff815fab11 RDI: ffff88018a9cf0c0
RBP: ffff88018a9cf658 R08: ffff88018a9c4540 R09: 0000000000000006
R10: ffff88018a9c4540 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff8801a96b8828 R14: ffff8801d9912440 R15: ffff8801a96b8828
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xed/0x130 lib/kobject.c:435
 br_add_if+0x76a/0x19e0 net/bridge/br_if.c:542
 add_del_if+0x10f/0x140 net/bridge/br_ioctl.c:101
 br_dev_ioctl+0xbf/0xe0 net/bridge/br_ioctl.c:396
 dev_ifsioc+0x43e/0xb90 net/core/dev_ioctl.c:334
 dev_ioctl+0x1b5/0xcc0 net/core/dev_ioctl.c:500
 sock_do_ioctl+0x1d3/0x3e0 net/socket.c:980
 sock_ioctl+0x30d/0x680 net/socket.c:1081
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x1650 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 SYSC_ioctl fs/ioctl.c:708 [inline]
 SyS_ioctl+0x24/0x30 fs/ioctl.c:706
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455319
RSP: 002b:00007fe922755c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe9227566d4 RCX: 0000000000455319
RDX: 0000000020000000 RSI: 00000000000089a2 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 000000000000036a R14: 00000000006f8290 R15: 0000000000000006
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..