RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 000000000000001c RSI: 0000000020011fd2 RDI: 0000000000000015
RBP: 00000000000003a3 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f37e8
R13: 00000000ffffffff R14: 00007f6b862996d4 R15: 0000000000000000
WARNING: CPU: 1 PID: 12925 at drivers/staging/android/ion/ion-ioctl.c:73 ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 12925 Comm: syz-executor5 Not tainted 4.15.0-rc6+ #248
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+0x194/0x257 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+0x2d7/0x3e0 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:ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73
RSP: 0018:ffff8801d6007ce0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: 0000000000000018 RCX: ffffffff8410f42b
RDX: 0000000000000077 RSI: ffffc9000336c000 RDI: ffff8801d6007d14
RBP: ffff8801d6007d78 R08: 7bf1cfff3f5dbe94 R09: ffffed003ac00fa5
R10: 0000000000000003 R11: ffffed003ac00fa4 R12: 1ffff1003ac00f9e
R13: 00000000c0184908 R14: ffff8801d6007d50 R15: dffffc0000000000
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 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:00007f6b86298c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 00000000201b8f5a RSI: 00000000c0184908 RDI: 0000000000000013
RBP: 00000000000005f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6fb0
R13: 00000000ffffffff R14: 00007f6b862996d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..