WARNING: CPU: 0 PID: 4339 at mm/page_alloc.c:3936 __alloc_pages_slowpath+0x1868/0x25c0 mm/page_alloc.c:3946
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4339 Comm: syz-executor3 Not tainted 4.15.0-rc6-next-20180103+ #87
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+0x137/0x198 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+0x249/0x290 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:1079
RIP: 0010:__alloc_pages_slowpath+0x1868/0x25c0 mm/page_alloc.c:3946
RSP: 0018:ffff8801ccf5f8a8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff100399ebf30 RCX: 0000000000000003
RDX: ffff8801ccf5fb08 RSI: 0000000000000033 RDI: 0000000000000000
RBP: ffff8801ccf5faa8 R08: 0000000000000000 R09: fffffffffff80f8a
R10: 0000000000000033 R11: 0000000000000000 R12: ffff8801ccf5fb68
R13: 0000000000000000 R14: 00000000014280c2 R15: ffff8801cbd84580
 __alloc_pages_nodemask+0x5aa/0x700 mm/page_alloc.c:4259
 alloc_pages_current+0xb6/0x1e0 mm/mempolicy.c:2055
 alloc_pages include/linux/gfp.h:492 [inline]
 ion_system_contig_heap_allocate+0x40/0x2c0 drivers/staging/android/ion/ion_system_heap.c:365
 ion_buffer_create drivers/staging/android/ion/ion.c:83 [inline]
 ion_alloc+0x21f/0x840 drivers/staging/android/ion/ion.c:410
 ion_ioctl+0x19e/0x210 drivers/staging/android/ion/ion-ioctl.c:74
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x190/0xfe0 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f67091b5c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 00000000209ce000 RSI: 00000000c0184900 RDI: 0000000000000013
RBP: 00000000000003a3 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f37e8
R13: 00000000ffffffff R14: 00007f67091b66d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..