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