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WARNING: CPU: 1 PID: 3819 at mm/page_alloc.c:3544 __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3544
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3819 Comm: syzkaller657379 Not tainted 4.9.80-g20c8a00 #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d7ee7428 ffffffff81d94b69 ffffffff83a47c40 ffff8801d7ee7500
 ffffffff83aa4e00 ffffffff81452f16 0000000000000009 ffff8801d7ee74f0
 ffffffff8142f541 0000000041b58ab3 ffffffff8418ab20 ffffffff8142f385
Call Trace:
 [<ffffffff81d94b69>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94b69>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f541>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131174>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff811313dc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff81452f16>] __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3544
 [<ffffffff81453eab>] __alloc_pages_nodemask+0x33b/0x6b0 mm/page_alloc.c:3851
 [<ffffffff814a75aa>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff814a75aa>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff814a75aa>] alloc_pages_node include/linux/gfp.h:460 [inline]
 [<ffffffff814a75aa>] kmalloc_order+0x2a/0x70 mm/slab_common.c:1043
 [<ffffffff814a760f>] kmalloc_order_trace+0x1f/0x190 mm/slab_common.c:1054
 [<ffffffff815397ad>] kmalloc_large include/linux/slab.h:422 [inline]
 [<ffffffff815397ad>] __kmalloc+0x19d/0x310 mm/slub.c:3730
 [<ffffffff8137c948>] kmalloc include/linux/slab.h:495 [inline]
 [<ffffffff8137c948>] relay_create_buf kernel/relay.c:172 [inline]
 [<ffffffff8137c948>] relay_open_buf.part.15+0xc8/0xa20 kernel/relay.c:449
 [<ffffffff8137d77a>] relay_open_buf kernel/relay.c:446 [inline]
 [<ffffffff8137d77a>] relay_open+0x4da/0x860 kernel/relay.c:596
 [<ffffffff813bf609>] do_blk_trace_setup+0x3e9/0x950 kernel/trace/blktrace.c:501
 [<ffffffff813bfc50>] blk_trace_setup+0xe0/0x1a0 kernel/trace/blktrace.c:545
 [<ffffffff813c013e>] blk_trace_ioctl+0x1de/0x300 kernel/trace/blktrace.c:654
 [<ffffffff81d38310>] blkdev_ioctl+0xb00/0x1a60 block/ioctl.c:576
 [<ffffffff8162c5fe>] block_ioctl+0xde/0x120 fs/block_dev.c:1688
 [<ffffffff815ae71a>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815ae71a>] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679
 [<ffffffff815af73f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815af73f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff838b34ee>] entry_SYSCALL_64_fastpath+0x29/0xe8
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..