------------[ cut here ]------------
WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 mm/slab_common.c:962
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2981 Comm: syzkaller460046 Not tainted 4.14.0-rc2+ #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 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:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:962
RSP: 0018:ffff8801ce446918 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700018
RBP: ffff8801ce446918 R08: 00000000000000e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000700018
R13: dffffc0000000000 R14: 00000000014080c0 R15: ffff8801ce215800
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3734
 kmalloc_array include/linux/slab.h:612 [inline]
 kcalloc include/linux/slab.h:623 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:441 [inline]
 ptr_ring_resize_multiple include/linux/ptr_ring.h:599 [inline]
 skb_array_resize_multiple include/linux/skb_array.h:200 [inline]
 tun_queue_resize drivers/net/tun.c:2763 [inline]
 tun_device_event+0x3d3/0xcd0 drivers/net/tun.c:2781
 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+0xbeb/0x38d0 net/core/rtnetlink.c:2089
 rtnl_setlink+0x270/0x3c0 net/core/rtnetlink.c:2300
 rtnetlink_rcv_msg+0x733/0x1090 net/core/rtnetlink.c:4246
 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2405
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4258
 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline]
 netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299
 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1862
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 sock_write_iter+0x320/0x5e0 net/socket.c:912
 call_write_iter include/linux/fs.h:1770 [inline]
 do_iter_readv_writev+0x531/0x7f0 fs/read_write.c:673
 do_iter_write+0x15a/0x540 fs/read_write.c:952
 compat_writev+0x225/0x420 fs/read_write.c:1266
 do_compat_writev+0x115/0x220 fs/read_write.c:1287
 C_SYSC_writev fs/read_write.c:1298 [inline]
 compat_SyS_writev+0x26/0x30 fs/read_write.c:1294
 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
 do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
RIP: 0023:0xf7f93c79
RSP: 002b:000000000820fe3c EFLAGS: 00000207 ORIG_RAX: 0000000000000092
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001ff0
RDX: 0000000000000001 RSI: 0000000000000167 RDI: 0000000000000010
RBP: 0000000000000003 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..