WARNING: CPU: 0 PID: 3661 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 mm/slab_common.c:971
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3661 Comm: syzkaller776388 Not tainted 4.15.0-rc9+ #188
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:1096
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:971
RSP: 0018:ffff8801bb76e7a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8
RBP: ffff8801bb76e7a0 R08: 1ffff100376edc67 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d4e942c0
 __do_kmalloc mm/slab.c:3703 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3717
 kmalloc_array include/linux/slab.h:618 [inline]
 kcalloc include/linux/slab.h:629 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:456 [inline]
 ptr_ring_resize_multiple include/linux/ptr_ring.h:614 [inline]
 skb_array_resize_multiple include/linux/skb_array.h:200 [inline]
 tun_queue_resize drivers/net/tun.c:3027 [inline]
 tun_device_event+0x3d3/0xcb0 drivers/net/tun.c:3045
 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+0x32/0x60 net/core/dev.c:1691
 call_netdevice_notifiers+0xac/0x100 net/core/dev.c:1709
 do_setlink+0xc10/0x3b30 net/core/rtnetlink.c:2211
 rtnl_newlink+0xf5a/0x1ab0 net/core/rtnetlink.c:2747
 rtnetlink_rcv_msg+0x733/0x1020 net/core/rtnetlink.c:4411
 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2409
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4423
 netlink_unicast_kernel net/netlink/af_netlink.c:1275 [inline]
 netlink_unicast+0x4ee/0x700 net/netlink/af_netlink.c:1301
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1864
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:648
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2028
 __sys_sendmsg+0xe5/0x210 net/socket.c:2062
 C_SYSC_sendmsg net/compat.c:739 [inline]
 compat_SyS_sendmsg+0x2a/0x40 net/compat.c:737
 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: 0023:0xf7fa5c79
RSP: 002b:00000000ffe9b4ec EFLAGS: 00000207 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020504000
RDX: 0000000000000000 RSI: 0000000000000167 RDI: 0000000000000010
RBP: 0000000000000002 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..