SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
==================================================================
SELinux:  unknown mount option
BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:307 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x17a5/0x1810 arch/x86/kernel/unwind_orc.c:437
Read of size 8 at addr ffff8881c52a7ad8 by task syz-executor159/2423
SELinux:  unknown mount option

CPU: 0 PID: 2423 Comm: syz-executor159 Not tainted 4.14.135+ #26
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
SELinux:  unknown mount option
 print_address_description+0x60/0x226 mm/kasan/report.c:187
SELinux:  unknown mount option
 __kasan_report.cold+0x1a/0x41 mm/kasan/report.c:316
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option
SELinux:  unknown mount option

The buggy address belongs to the page:
page:ffffea000714a9c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea000714a9e0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c52a7980: f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffff8881c52a7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881c52a7a80: 00 00 f1 f1 f1 f1 00 00 00 f2 f2 f2 00 00 00 00
                                                    ^
 ffff8881c52a7b00: 00 00 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00
 ffff8881c52a7b80: 00 00 f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 00 00
==================================================================