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lib/isc/pkc11.c: Fix possible NULL pointer dereference in push_attribute()

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(cherry picked from commit e8948fd9b4)
This commit is contained in:
Ondřej Surý 2019-09-27 12:01:30 +02:00
parent ac1127b2ad
commit 4acf396f83
1 changed files with 5 additions and 1 deletions
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6
lib/isc/pk11.c
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@ -802,13 +802,17 @@ push_attribute(pk11_object_t *obj, isc_mem_t *mctx, size_t len) {
CK_ATTRIBUTE *attr;
CK_BYTE cnt = obj->attrcnt;
REQUIRE(old != NULL || cnt == 0);
obj->repr = isc_mem_get(mctx, (cnt + 1) * sizeof(*attr));
if (obj->repr == NULL) {
obj->repr = old;
return (NULL);
}
memset(obj->repr, 0, (cnt + 1) * sizeof(*attr));
memmove(obj->repr, old, cnt * sizeof(*attr));
if (old != NULL) {
memmove(obj->repr, old, cnt * sizeof(*attr));
}
attr = obj->repr + cnt;
attr->ulValueLen = (CK_ULONG) len;
attr->pValue = isc_mem_get(mctx, len);