netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'.
netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'.
------------[ cut here ]------------
sysfs: cannot create duplicate filename '/class/net/
'
WARNING: CPU: 0 PID: 27474 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7e/0xa0 fs/sysfs/dir.c:30
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 27474 Comm: syz-executor0 Not tainted 4.15.0-rc7+ #166
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+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+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+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:sysfs_warn_dup+0x7e/0xa0 fs/sysfs/dir.c:30
RSP: 0018:ffff8801ce65f330 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: ffff8801d60dec80 RCX: ffffffff8159da9e
RDX: 0000000000001172 RSI: ffffc90002c4a000 RDI: 0000000000000212
RBP: ffff8801ce65f348 R08: 1ffff10039ccbdf9 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d56e64c0
R13: ffff8801d8343a80 R14: 0000000000000001 R15: ffffffffffffffef
 sysfs_do_create_link_sd.isra.2+0xf3/0x110 fs/sysfs/symlink.c:51
 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92
 device_add_class_symlinks drivers/base/core.c:1603 [inline]
 device_add+0x74a/0x1650 drivers/base/core.c:1801
 netdev_register_kobject+0x183/0x360 net/core/net-sysfs.c:1604
 register_netdevice+0xb2b/0x1010 net/core/dev.c:7710
 __ip_tunnel_create+0x30a/0x640 net/ipv4/ip_tunnel.c:281
 ip_tunnel_create net/ipv4/ip_tunnel.c:367 [inline]
 ip_tunnel_ioctl+0x729/0xc40 net/ipv4/ip_tunnel.c:871
 ipip_tunnel_ioctl+0x28b/0x390 net/ipv4/ipip.c:350
 dev_ifsioc+0x333/0x9b0 net/core/dev_ioctl.c:354
 dev_ioctl+0xa73/0xfb0 net/core/dev_ioctl.c:589
 compat_ifr_data_ioctl+0x116/0x160 net/socket.c:2954
 compat_sock_ioctl_trans net/socket.c:3175 [inline]
 compat_sock_ioctl+0x29a/0x29f0 net/socket.c:3254
 C_SYSC_ioctl fs/compat_ioctl.c:1473 [inline]
 compat_SyS_ioctl+0x151/0x2a30 fs/compat_ioctl.c:1419
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:129
RIP: 0023:0xf7f36c79
RSP: 002b:00000000f771108c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 00000000000089f1
RDX: 0000000020568fd8 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..