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Fix ASAN warning for uint128_union.decode_decimal #1890



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commented Apr 10, 2019

[ RUN      ] uint128_union.decode_decimal
ERROR: AddressSanitizer: stack-use-after-scope on address 0x7ffeefbf7750 at pc 0x000105a92279 bp 0x7ffeefbf5ca0 sp 0x7ffeefbf5c98

From nano::uint128_union::decode_dec (), this:
auto result (integer_part.number () * scale + decimal_part.number () * boost::multiprecision::pow (boost::multiprecision::cpp_int (10), (scale_length - decimal_text.length () - 1)));

is an expression template (the decimal_part.number () and result from boost::multiprecision::pow) . It seems that anything used in conjunction with these expression templates needs to be kept in scope as only references are kept within. I have split up the expression into multiple parts.

@wezrule wezrule added the sanitizers label Apr 10, 2019

@wezrule wezrule added this to the V19.0 milestone Apr 10, 2019

@wezrule wezrule requested a review from SergiySW Apr 10, 2019

@wezrule wezrule self-assigned this Apr 10, 2019

@wezrule wezrule merged commit 33e3be0 into nanocurrency:master Apr 10, 2019

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@wezrule wezrule deleted the wezrule:fix_asan_uint128_union_decode_decimal branch Apr 10, 2019

@zhyatt zhyatt added this to CP3 (2019-04-10) in V19 Apr 10, 2019

guilhermelawless added a commit to guilhermelawless/nano-node that referenced this pull request Apr 15, 2019

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