IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
ODEBUG: free active (active state 0) object type: timer_list hint: resync_tnc+0x0/0x3c0 drivers/net/hamradio/6pack.c:839
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9347 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9347 Comm: syz-executor.0 Not tainted 4.14.277-syzkaller #0
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+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 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
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
RSP: 0018:ffff88805a9f78f8 EFLAGS: 00010086
RAX: 0000000000000057 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff81443120 RDI: ffffed100b53ef15
RBP: ffffffff878b78c0 R08: 0000000000000057 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880959b86c0 R12: ffffffff83f92780
R13: 0000000000000000 R14: ffff88805a8a0080 R15: ffff8880b42b7428
 __debug_check_no_obj_freed lib/debugobjects.c:747 [inline]
 debug_check_no_obj_freed+0x3b7/0x680 lib/debugobjects.c:776
 kfree+0xb9/0x250 mm/slab.c:3814
 kvfree+0x45/0x50 mm/util.c:416
 device_release+0x15f/0x1a0 drivers/base/core.c:848
 kobject_cleanup lib/kobject.c:646 [inline]
 kobject_release lib/kobject.c:675 [inline]
 kref_put include/linux/kref.h:70 [inline]
 kobject_put+0x251/0x550 lib/kobject.c:692
 netdev_run_todo+0x747/0xad0 net/core/dev.c:7969
 sixpack_close+0xd3/0x180 drivers/net/hamradio/6pack.c:688
 tty_ldisc_close+0x8c/0xc0 drivers/tty/tty_ldisc.c:505
 tty_ldisc_kill drivers/tty/tty_ldisc.c:651 [inline]
 tty_ldisc_hangup+0x269/0x6c0 drivers/tty/tty_ldisc.c:769
 __tty_hangup.part.0+0x31a/0x730 drivers/tty/tty_io.c:622
 __tty_hangup drivers/tty/tty_io.c:2600 [inline]
 tty_vhangup drivers/tty/tty_io.c:695 [inline]
 tty_ioctl+0x730/0x1430 drivers/tty/tty_io.c:2599
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fd87fe160e9
RSP: 002b:00007fd87e76a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd87ff29030 RCX: 00007fd87fe160e9
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007fd87fe7008d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5be095ff R14: 00007fd87e76a300 R15: 0000000000022000

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