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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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2
src/memline.c
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@ -5778,7 +5778,7 @@ ml_find_line_or_offset(buf_T *buf, linenr_T lnum, long *offp)
&& lnum >= curline + buf->b_ml.ml_chunksize[curix].mlcs_numlines)
|| (offset != 0
&& offset > size + buf->b_ml.ml_chunksize[curix].mlcs_totalsize
+ ffdos * buf->b_ml.ml_chunksize[curix].mlcs_numlines)))
+ (long)ffdos * buf->b_ml.ml_chunksize[curix].mlcs_numlines)))
{
curline += buf->b_ml.ml_chunksize[curix].mlcs_numlines;
size += buf->b_ml.ml_chunksize[curix].mlcs_totalsize;