WARNING: CPU: 0 PID: 12710 at drivers/staging/android/ion/ion.c:148 ion_buffer_kmap_get drivers/staging/android/ion/ion.c:147 [inline]
WARNING: CPU: 0 PID: 12710 at drivers/staging/android/ion/ion.c:148 ion_dma_buf_begin_cpu_access+0x48e/0x5a0 drivers/staging/android/ion/ion.c:328
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12710 Comm: syz-executor6 Not tainted 4.17.0+ #7
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+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba 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_kmap_get drivers/staging/android/ion/ion.c:147 [inline]
RIP: 0010:ion_dma_buf_begin_cpu_access+0x48e/0x5a0 drivers/staging/android/ion/ion.c:328
Code: ff 41 bc ea ff ff ff 89 de e8 fe b0 b1 fb 84 db 75 a8 e8 25 b0 b1 fb 48 c7 c7 00 1d 68 88 c6 05 0d a5 cf 03 01 e8 82 35 7d fb <0f> 0b eb 8c 48 c7 c7 c0 10 ef 88 e8 02 7b ef fb e9 15 ff ff ff e8 
RSP: 0018:ffff88018dab7c50 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90005640000
RDX: 0000000000040000 RSI: ffffffff81631861 RDI: ffff88018dab7928
RBP: ffff88018dab7ca8 R08: ffff88019016e700 R09: 0000000000000006
R10: ffff88019016e700 R11: 0000000000000000 R12: 00000000ffffffea
R13: ffff8801acc1b348 R14: 0000000000000002 R15: ffffffff89726e60
 dma_buf_begin_cpu_access+0x7f/0x160 drivers/dma-buf/dma-buf.c:823
 dma_buf_ioctl+0x1af/0x250 drivers/dma-buf/dma-buf.c:314
 __do_compat_sys_ioctl fs/compat_ioctl.c:1459 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:1405 [inline]
 __ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1405
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7ff3cb9
Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 
RSP: 002b:00000000f5fef0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000040086200
RDX: 00000000200002c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..