------------[ cut here ]------------
WARNING: CPU: 1 PID: 3323 at mm/page_alloc.c:3550 __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3550
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3323 Comm: syzkaller844554 Not tainted 4.9.70-gc14c7b3 #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c9577428 ffffffff81d90c49 ffffffff83a46d00 ffff8801c9577500
 ffffffff83aa3e00 ffffffff8144fe36 0000000000000009 ffff8801c95774f0
 ffffffff8142c481 0000000041b58ab3 ffffffff84187288 ffffffff8142c2c5
Call Trace:
 [<ffffffff81d90c49>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90c49>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142c481>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8112f3d4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8112f63c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8144fe36>] __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3550
 [<ffffffff81450dcb>] __alloc_pages_nodemask+0x33b/0x6b0 mm/page_alloc.c:3857
 [<ffffffff814a418a>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff814a418a>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff814a418a>] alloc_pages_node include/linux/gfp.h:460 [inline]
 [<ffffffff814a418a>] kmalloc_order+0x2a/0x70 mm/slab_common.c:1043
 [<ffffffff814a41ef>] kmalloc_order_trace+0x1f/0x190 mm/slab_common.c:1054
 [<ffffffff81535e5d>] kmalloc_large include/linux/slab.h:422 [inline]
 [<ffffffff81535e5d>] __kmalloc+0x19d/0x310 mm/slub.c:3730
 [<ffffffff813798b8>] kmalloc include/linux/slab.h:495 [inline]
 [<ffffffff813798b8>] relay_create_buf kernel/relay.c:172 [inline]
 [<ffffffff813798b8>] relay_open_buf.part.15+0xc8/0xa20 kernel/relay.c:449
 [<ffffffff8137a6ea>] relay_open_buf kernel/relay.c:446 [inline]
 [<ffffffff8137a6ea>] relay_open+0x4da/0x860 kernel/relay.c:596
 [<ffffffff813bc579>] do_blk_trace_setup+0x3e9/0x950 kernel/trace/blktrace.c:501
 [<ffffffff813bcbc0>] blk_trace_setup+0xe0/0x1a0 kernel/trace/blktrace.c:545
 [<ffffffff813bd0ae>] blk_trace_ioctl+0x1de/0x300 kernel/trace/blktrace.c:654
 [<ffffffff81d34410>] blkdev_ioctl+0xb00/0x1a60 block/ioctl.c:576
 [<ffffffff816288de>] block_ioctl+0xde/0x120 fs/block_dev.c:1688
 [<ffffffff815aaa0a>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815aaa0a>] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679
 [<ffffffff815aba2f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815aba2f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff838aa405>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..