RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000004bcb74 R14: 00000000004cabf0 R15: 0000000000000000
------------[ cut here ]------------
heap->ops->map_kernel should return ERR_PTR on error
WARNING: CPU: 1 PID: 17979 at drivers/staging/android/ion/ion.c:148 ion_buffer_kmap_get drivers/staging/android/ion/ion.c:147 [inline]
WARNING: CPU: 1 PID: 17979 at drivers/staging/android/ion/ion.c:148 ion_dma_buf_begin_cpu_access+0x48e/0x5a0 drivers/staging/android/ion/ion.c:328
Node 0 
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 17979 Comm: syz-executor5 Not tainted 4.18.0-rc2+ #125
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
DMA: 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
1*4kB 
(U) 
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
0*8kB 
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
0*16kB 
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
1*32kB 
 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: 
(U) 
ff 41 bc ea ff ff ff 
2*64kB 
89 de e8 ce c0 b1 fb 84 
(U) 
db 75 a8 e8 f5 bf b1 fb 
1*128kB 
48 c7 c7 00 e8 67 88 c6 
(U) 
05 5c 52 cf 03 01 e8 c2 
1*256kB 
e2 7c fb <0f> 0b eb 8c 48 
(U) 
c7 c7 c0 10 ef 88 e8 82 
0*512kB 
93 ef fb e9 15 ff ff ff 
1*1024kB 
e8 
RSP: 0018:ffff880182a3fae8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90006630000
RDX: 0000000000040000 RSI: ffffffff816318f1 RDI: ffff880182a3f7c0
RBP: ffff880182a3fb40 R08: ffff880195a02bf8 R09: 0000000000000006
(U) 
R10: ffff880195a023c0 R11: 0000000000000000 R12: 00000000ffffffea
R13: ffff8801d3dd2888 R14: 0000000000000002 R15: ffffffff89727840
1*2048kB 
(M) 
 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
3*4096kB 
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684
(M) 
= 15908kB
Node 0 
DMA32: 
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
2*4kB 
(M) 
6*8kB 
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a99
Code: 
(UM) 
1d ba fb ff c3 66 
4*16kB 
2e 0f 1f 84 00 00 00 00 
(UM) 
00 66 90 48 89 f8 48 89 
4*32kB 
f7 48 89 d6 48 89 ca 4d 
(M) 
89 c2 4d 89 c8 4c 8b 4c 
3*64kB 
24 08 0f 05 <48> 3d 01 f0 
(UM) 
ff ff 0f 83 eb b9 fb ff 
2*128kB 
c3 66 2e 0f 1f 84 00 00 
(M) 
00 00 
RSP: 002b:00007f07e8813c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f07e88146d4 RCX: 0000000000455a99
RDX: 0000000020000080 RSI: 0000000040086200 RDI: 0000000000000015
2*256kB 
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000004bcb74 R14: 00000000004cabf0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..