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taskset: tighten the check for stride values

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function                                             old     new   delta
taskset_main                                         986     987      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-11-09 17:32:43 +01:00
parent a82fb1b9d8
commit b230fdfa9d
1 changed files with 2 additions and 2 deletions
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4
util-linux/taskset.c
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@ -149,8 +149,8 @@ static void parse_cpulist(ul *mask, unsigned max, char *s)
if ((*s != ',' && *s != '\0') if ((*s != ',' && *s != '\0')
|| bit > end || bit > end
|| end == UINT_MAX /* bb_strtou returns this on malformed / ERANGE numbers */ || end == UINT_MAX /* bb_strtou returns this on malformed / ERANGE numbers */
|| stride == 0 || (stride - 1) > (UINT_MAX / 4)
|| stride == UINT_MAX /* disallow 0, malformed input, and too large stride prone to overflows */
) { ) {
bb_error_msg_and_die("bad affinity '%s'", aff); bb_error_msg_and_die("bad affinity '%s'", aff);
} }