https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62196
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-14
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
abcdefghijklmnopqrstuvwxyz
=================================================================
==15899==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x602000000036 at pc 0x0000004024c5 bp 0x7ffe7350f5f0 sp 0x7ffe7350f5e0
READ of size 1 at 0x602000000036 thread T0
#0 0x4024c4 in void std::__valarray_copy<char>(std::_Array<char>, unsigned
long, std::_Array<char>, std::_Array<bool>) (/tmp/a.out+0x4024c4)
#1 0x402092 in std::mask_array<char>::operator=(std::valarray<char> const&)
const (/tmp/a.out+0x402092)
#2 0x40154c in main (/tmp/a.out+0x40154c)
#3 0x7f3736481f29 in __libc_start_main (/lib64/libc.so.6+0x20f29)
#4 0x400ef9 in _start (/tmp/a.out+0x400ef9)
0x602000000036 is located 0 bytes to the right of 6-byte region
[0x602000000030,0x602000000036)
allocated by thread T0 here:
#0 0x7f37371e0158 in operator new(unsigned long)
(/lib64/libasan.so.4+0xe0158)
#1 0x40187a in std::__valarray_get_memory(unsigned long)
(/tmp/a.out+0x40187a)
#2 0x402155 in bool* restrict std::__valarray_get_storage<bool>(unsigned
long) (/tmp/a.out+0x402155)
#3 0x401a35 in std::valarray<bool>::valarray(bool const*, unsigned long)
(/tmp/a.out+0x401a35)
#4 0x4013e8 in main (/tmp/a.out+0x4013e8)
#5 0x7f3736481f29 in __libc_start_main (/lib64/libc.so.6+0x20f29)
SUMMARY: AddressSanitizer: heap-buffer-overflow (/tmp/a.out+0x4024c4) in void
std::__valarray_copy<char>(std::_Array<char>, unsigned long, std::_Array<char>,
std::_Array<bool>)
Shadow bytes around the buggy address:
0x0c047fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c047fff8000: fa fa 06 fa fa fa[06]fa fa fa fa fa fa fa fa fa
0x0c047fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==15899==ABORTING
