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util: check overflow in parse_nsec()

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This commit is contained in:
Yu Watanabe
2018-10-23 22:24:16 +09:00
parent 8079c90333
commit f6a178e91d
1 changed files with 12 additions and 2 deletions
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14
src/basic/time-util.c
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@@ -1194,12 +1194,22 @@ int parse_nsec(const char *t, nsec_t *nsec) {
for (i = 0; i < ELEMENTSOF(table); i++)
if (startswith(e, table[i].suffix)) {
nsec_t k = (nsec_t) z * table[i].nsec;
nsec_t k;
k = ((nsec_t) -1) / table[i].nsec;
if ((nsec_t) l + 1 >= k || (nsec_t) z >= k)
return -ERANGE;
k = (nsec_t) z * table[i].nsec;
for (; n > 0; n--)
k /= 10;
r += (nsec_t) l * table[i].nsec + k;
k += (nsec_t) l * table[i].nsec;
if (k >= ((nsec_t) -1) - r)
return -ERANGE;
r += k;
p = e + strlen(table[i].suffix);
something = true;