WARNING: CPU: 0 PID: 3261 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: 0 PID: 3261 Comm: syzkaller033021 Not tainted 4.9.58-g28b1597 #73
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d873f418 ffffffff81d91149 ffffffff83a46b40 ffff8801d873f4f0
 ffffffff83aa3c00 ffffffff81451a56 0000000000000009 ffff8801d873f4e0
 ffffffff8142e1f1 0000000041b58ab3 ffffffff84185d28 ffffffff8142e035
Call Trace:
 [<ffffffff81d91149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d91149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e1f1>] 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
 [<ffffffff81451a56>] __alloc_pages_slowpath+0x1136/0x1d90 mm/page_alloc.c:3548
 [<ffffffff814529eb>] __alloc_pages_nodemask+0x33b/0x6b0 mm/page_alloc.c:3855
 [<ffffffff814a5d9a>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff814a5d9a>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff814a5d9a>] alloc_pages_node include/linux/gfp.h:460 [inline]
 [<ffffffff814a5d9a>] kmalloc_order+0x2a/0x70 mm/slab_common.c:1041
 [<ffffffff814a5dff>] kmalloc_order_trace+0x1f/0x190 mm/slab_common.c:1052
 [<ffffffff81537a1d>] kmalloc_large include/linux/slab.h:422 [inline]
 [<ffffffff81537a1d>] __kmalloc+0x19d/0x310 mm/slub.c:3730
 [<ffffffff8137b6c8>] kmalloc include/linux/slab.h:495 [inline]
 [<ffffffff8137b6c8>] relay_create_buf kernel/relay.c:172 [inline]
 [<ffffffff8137b6c8>] relay_open_buf.part.15+0xc8/0xa20 kernel/relay.c:449
 [<ffffffff8137c4fa>] relay_open_buf kernel/relay.c:446 [inline]
 [<ffffffff8137c4fa>] relay_open+0x4da/0x860 kernel/relay.c:596
 [<ffffffff813be389>] do_blk_trace_setup+0x3e9/0x950 kernel/trace/blktrace.c:501
 [<ffffffff813be9d0>] blk_trace_setup+0xe0/0x1a0 kernel/trace/blktrace.c:545
 [<ffffffff813beebe>] blk_trace_ioctl+0x1de/0x300 kernel/trace/blktrace.c:654
 [<ffffffff81d34910>] blkdev_ioctl+0xb00/0x1a60 block/ioctl.c:576
 [<ffffffff81629c0e>] block_ioctl+0xde/0x120 fs/block_dev.c:1688
 [<ffffffff815abfaa>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815abfaa>] do_vfs_ioctl+0x1aa/0x10c0 fs/ioctl.c:679
 [<ffffffff815acf4f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815acf4f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff838aa0c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..