------------[ cut here ]------------
WARNING: CPU: 1 PID: 3245 at mm/page_alloc.c:3548 __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3548
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3245 Comm: syzkaller848652 Not tainted 4.9.60-g4ca16e6 #83
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d4d2f1f0 ffffffff81d91389 ffffffff83a46ba0 ffff8801d4d2f2c8
 ffffffff83aa3c00 ffffffff81451bf6 0000000000000009 ffff8801d4d2f2b8
 ffffffff8142e391 0000000041b58ab3 ffffffff84185da0 ffffffff8142e1d5
Call Trace:
 [<ffffffff81d91389>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d91389>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e391>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811321e4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8113244c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff81451bf6>] __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3548
 [<ffffffff81452b8b>] __alloc_pages_nodemask+0x33b/0x6b0 mm/page_alloc.c:3855
 [<ffffffff814a5f3a>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff814a5f3a>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff814a5f3a>] alloc_pages_node include/linux/gfp.h:460 [inline]
 [<ffffffff814a5f3a>] kmalloc_order+0x2a/0x70 mm/slab_common.c:1041
 [<ffffffff814a5f9f>] kmalloc_order_trace+0x1f/0x190 mm/slab_common.c:1052
 [<ffffffff81537bbd>] kmalloc_large include/linux/slab.h:422 [inline]
 [<ffffffff81537bbd>] __kmalloc+0x19d/0x310 mm/slub.c:3730
 [<ffffffff8340d474>] kmalloc include/linux/slab.h:495 [inline]
 [<ffffffff8340d474>] kzalloc include/linux/slab.h:636 [inline]
 [<ffffffff8340d474>] ip6_setup_cork+0x194/0x1200 net/ipv6/ip6_output.c:1226
 [<ffffffff83421268>] ip6_make_skb+0x1b8/0x440 net/ipv6/ip6_output.c:1802
 [<ffffffff834871bd>] udpv6_sendmsg+0x1b1d/0x2540 net/ipv6/udp.c:1240
 [<ffffffff832e8c6c>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753
 [<ffffffff82eceb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82eceb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ecfaf8>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82ed1fa0>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff838aa305>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..