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patch 8.2.4255: theoretical computation overflow

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Problem:    Theoretical computation overflow.
Solution:   Perform multiplication in a wider type. (closes #9657)
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2022-01-29 15:19:23 +00:00
committed by Bram Moolenaar
parent f12b7815f6
commit d5cec1f1f0
11 changed files with 28 additions and 23 deletions
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src/eval.c
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@@ -4632,7 +4632,7 @@ garbage_collect(int testing)
// Don't make it bigger though.
if (exestack.ga_len + n < exestack.ga_maxlen)
{
new_len = exestack.ga_itemsize * (exestack.ga_len + n);
new_len = (size_t)exestack.ga_itemsize * (exestack.ga_len + n);
pp = vim_realloc(exestack.ga_data, new_len);
if (pp == NULL)
return FAIL;