SELinux: ebitmap: truncated map
SELinux: ebitmap: truncated map
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BUG: KASAN: stack-out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
BUG: KASAN: stack-out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
Read of size 8 at addr ffff8801cd747b70 by task syz-executor3/7412

CPU: 1 PID: 7412 Comm: syz-executor3 Not tainted 4.9.88-gbb52bba #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cd087770 ffffffff81d95f19 ffffea000735d1c0 ffff8801cd747b70
 0000000000000000 ffff8801cd747b70 ffff8801cd0878a0 ffff8801cd0877a8
 ffffffff8153e793 ffff8801cd747b70 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d95f19>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95f19>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e793>] print_address_description+0x73/0x280 mm/kasan/report.c:256
 [<ffffffff8153ec95>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8153ec95>] kasan_report+0x255/0x380 mm/kasan/report.c:412
 [<ffffffff8153ee34>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d5437>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d5437>] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff8107c639>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff8107c639>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff8107c738>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c6266>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c7a38>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e9a5f>] seq_read+0x32f/0x1290 fs/seq_file.c:240
 [<ffffffff8156d338>] do_loop_readv_writev.part.17+0xc8/0x2b0 fs/read_write.c:715
 [<ffffffff8157251f>] do_loop_readv_writev fs/read_write.c:1097 [inline]
 [<ffffffff8157251f>] compat_do_readv_writev+0x5ff/0x740 fs/read_write.c:1091
 [<ffffffff81572743>] compat_readv+0xe3/0x150 fs/read_write.c:1120
 [<ffffffff815728a4>] do_compat_readv+0xf4/0x1d0 fs/read_write.c:1140
 [<ffffffff81574e16>] C_SYSC_readv fs/read_write.c:1152 [inline]
 [<ffffffff81574e16>] compat_SyS_readv+0x26/0x30 fs/read_write.c:1148
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b9190>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea000735d1c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801cd747a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801cd747a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
>ffff8801cd747b00: f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2
                                                             ^
 ffff8801cd747b80: f2 f2 f2 00 00 f2 f2 00 00 00 00 00 00 00 00 00
 ffff8801cd747c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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