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[TD-1939]<fix>: possible crash in wildcard query

This commit is contained in:
Bomin Zhang 2020-11-05 11:36:46 +08:00
parent 4482aef905
commit b8d48e8ea0
1 changed files with 5 additions and 1 deletions
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6
src/tsdb/src/tsdbRead.c
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@ -2311,7 +2311,11 @@ void filterPrepare(void* expr, void* param) {
if (pInfo->optr == TSDB_RELATION_IN) { if (pInfo->optr == TSDB_RELATION_IN) {
pInfo->q = (char*) pCond->arr; pInfo->q = (char*) pCond->arr;
} else { } else {
pInfo->q = calloc(1, pSchema->bytes + TSDB_NCHAR_SIZE); // to make sure tonchar does not cause invalid write, since the '\0' needs at least sizeof(wchar_t) space. uint32_t size = pCond->nLen * TSDB_NCHAR_SIZE;
if (size < (uint32_t)pSchema->bytes) {
size = pSchema->bytes;
}
pInfo->q = calloc(1, size + TSDB_NCHAR_SIZE); // to make sure tonchar does not cause invalid write, since the '\0' needs at least sizeof(wchar_t) space.
tVariantDump(pCond, pInfo->q, pSchema->type, true); tVariantDump(pCond, pInfo->q, pSchema->type, true);
} }
} }