WARNING: CPU: 0 PID: 2082 at drivers/staging/android/ion/ion.c:117 ion_buffer_destroy+0xe3/0x1a0 drivers/staging/android/ion/ion.c:117
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2082 Comm: ion_system_heap Not tainted 4.17.0+ #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:ion_buffer_destroy+0xe3/0x1a0 drivers/staging/android/ion/ion.c:117
Code: 85 b9 00 00 00 49 8b 44 24 08 48 89 df e8 15 c4 00 02 48 89 df e8 0d 5a f7 fb 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 5d 91 ba fb <0f> 0b 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 18 48 89 fa 48 c1 
RSP: 0018:ffff8801ce06fd30 EFLAGS: 00010293
RAX: ffff8801ce072180 RBX: ffff8801b710fac0 RCX: ffffffff85bfabb4
RDX: 0000000000000000 RSI: ffffffff85bfac03 RDI: 0000000000000005
RBP: ffff8801ce06fd58 R08: ffff8801ce072180 R09: ffffed0039c251a6
R10: ffffed0039c251a6 R11: ffff8801ce128d33 R12: ffffffff89724920
R13: ffff8801ce128c80 R14: 0000000000000001 R15: ffff8801b710fae0
 ion_heap_deferred_free+0x31e/0x670 drivers/staging/android/ion/ion_heap.c:236
 kthread+0x345/0x410 kernel/kthread.c:240
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..