netlink: 9 bytes leftover after parsing attributes in process `syz-executor3'.
sg_write: data in/out 822404280/197 bytes for SCSI command 0x12-- guessing data in;
   program syz-executor0 not setting count and/or reply_len properly
sg_write: data in/out 262364/161 bytes for SCSI command 0xff-- guessing data in;
   program syz-executor0 not setting count and/or reply_len properly
WARNING: CPU: 1 PID: 22282 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x60/0x80 fs/sysfs/dir.c:30
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 22282 Comm: syz-executor7 Not tainted 4.15.0-rc3-next-20171214+ #67
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+0xe9/0x14b lib/dump_stack.c:53
 panic+0x10e/0x2f8 kernel/panic.c:183
 __warn+0x14e/0x150 kernel/panic.c:547
 report_bug+0x11e/0x1a0 lib/bug.c:184
 fixup_bug.part.11+0x17/0x30 arch/x86/kernel/traps.c:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x14a/0x180 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:sysfs_warn_dup+0x60/0x80 fs/sysfs/dir.c:30
RSP: 0018:ffffc90001b77a80 EFLAGS: 00010282
RAX: 0000000000000036 RBX: ffff8802135bf000 RCX: ffffffff8123dede
RDX: 0000000000010000 RSI: ffffc90001949000 RDI: ffff88021fd136f8
RBP: ffffc90001b77a98 R08: ffff88021fd1bd00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801e1ae1d60
R13: ffff88021654cc80 R14: 0000000000000001 R15: ffffffffffffffef
 sysfs_do_create_link_sd.isra.2+0xd8/0xf0 fs/sysfs/symlink.c:51
 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 sysfs_create_link+0x49/0x70 fs/sysfs/symlink.c:92
 device_add_class_symlinks drivers/base/core.c:1601 [inline]
 device_add+0x35f/0x840 drivers/base/core.c:1799
 netdev_register_kobject+0xa2/0x190 net/core/net-sysfs.c:1604
 register_netdevice+0x573/0x710 net/core/dev.c:7743
 ip6_tnl_create2+0xef/0x1f0 net/ipv6/ip6_tunnel.c:269
 ip6_tnl_create net/ipv6/ip6_tunnel.c:317 [inline]
 ip6_tnl_locate+0x3f2/0x460 net/ipv6/ip6_tunnel.c:365
 ip6_tnl_ioctl+0x240/0x560 net/ipv6/ip6_tunnel.c:1611
 dev_ifsioc+0x175/0x520 net/core/dev_ioctl.c:354
 dev_ioctl+0x548/0x7a0 net/core/dev_ioctl.c:589
 sock_ioctl+0x150/0x320 net/socket.c:998
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f7d802cac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7d802cb700 RCX: 0000000000452a39
RDX: 00000000207df000 RSI: 00000000000089f1 RDI: 0000000000000017
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f7d802cb9c0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..