------------[ cut here ]------------
WARNING: CPU: 2 PID: 2908 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 mm/slab_common.c:962
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 2908 Comm: syzkaller129596 Not tainted 4.13.0-rc4-next-20170811 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:180
 __warn+0x1c4/0x1d9 kernel/panic.c:541
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:930
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:962
RSP: 0018:ffff8800392a6aa0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88006d0da1c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700040
RBP: ffff8800392a6aa0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000014080c0 R15: 0000000000700040
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x24/0x710 mm/slab.c:3734
 kmalloc include/linux/slab.h:498 [inline]
 kzalloc include/linux/slab.h:666 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:441 [inline]
 ptr_ring_resize_multiple include/linux/ptr_ring.h:598 [inline]
 skb_array_resize_multiple include/linux/skb_array.h:199 [inline]
 tun_queue_resize drivers/net/tun.c:2546 [inline]
 tun_device_event+0x3e9/0xca0 drivers/net/tun.c:2564
 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1671
 call_netdevice_notifiers+0x6a/0x90 net/core/dev.c:1687
 do_setlink+0xbe5/0x38d0 net/core/rtnetlink.c:2091
 rtnl_setlink+0x270/0x3c0 net/core/rtnetlink.c:2302
 rtnetlink_rcv_msg+0x733/0x1090 net/core/rtnetlink.c:4248
 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2397
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4260
 netlink_unicast_kernel net/netlink/af_netlink.c:1265 [inline]
 netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1291
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1854
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 sock_write_iter+0x31a/0x5d0 net/socket.c:912
 call_write_iter include/linux/fs.h:1742 [inline]
 do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:650
 do_iter_write+0x154/0x540 fs/read_write.c:929
 vfs_writev+0x18a/0x340 fs/read_write.c:975
 do_writev+0xfc/0x2a0 fs/read_write.c:1011
 SYSC_writev fs/read_write.c:1084 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1081
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x43a539
RSP: 002b:00000000007dfe48 EFLAGS: 00000207 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043a539
RDX: 0000000000000001 RSI: 0000000020001ff0 RDI: 0000000000000004
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000
R13: 0000000000402b00 R14: 0000000000402b90 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..