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(diff_2_files): Avoid arithmetic overflow in buffer size calculation.

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This commit is contained in:
Paul Eggert 2002-02-28 04:28:07 +00:00
parent 1035ed370d
commit e53339d2dc
1 changed files with 5 additions and 3 deletions
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8
src/analyze.c
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@ -1,7 +1,7 @@
/* Analyze file differences for GNU DIFF.
Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1998, 2001 Free
Software Foundation, Inc.
Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1998, 2001, 2002
Free Software Foundation, Inc.
This file is part of GNU DIFF.
@ -853,7 +853,9 @@ diff_2_files (struct comparison *cmp)
size_t buffer_size =
buffer_lcm (sizeof (word),
buffer_lcm (STAT_BLOCKSIZE (cmp->file[0].stat),
STAT_BLOCKSIZE (cmp->file[1].stat)));
STAT_BLOCKSIZE (cmp->file[1].stat),
PTRDIFF_MAX - 1),
PTRDIFF_MAX - 1);
for (f = 0; f < 2; f++)
cmp->file[f].buffer = xrealloc (cmp->file[f].buffer, buffer_size);