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(parse_tabstops): Detect overflow properly.

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Jim Meyering
2003-07-26 09:10:45 +00:00
parent 46baf9f422
commit cab4bde6e1
1 changed files with 5 additions and 3 deletions
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src/expand.c
+5 -3
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@@ -173,10 +173,11 @@ parse_tabstops (char const *stops)
num_start = stops;
}
{
int new_t;
/* Detect overflow. */
int prev = tabval;
tabval = tabval * 10 + *stops - '0';
if (tabval < prev)
new_t = 10 * tabval + *stops - '0';
if (INT_MAX / 10 < tabval || new_t < tabval * 10)
{
size_t len = strspn (num_start, "0123456789");
char *bad_num = xstrndup (num_start, len);
@@ -184,6 +185,7 @@ parse_tabstops (char const *stops)
fail = 1;
stops = num_start + len - 1;
}
tabval = new_t;
}
}
else