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[check overflow]

This commit is contained in:
fangpanpan 2020-01-17 15:01:18 +08:00
parent a63b848a97
commit b252163e22
1 changed files with 11 additions and 4 deletions
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15
src/client/src/tscSQLParser.c
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@ -5705,15 +5705,22 @@ void tscPrintSelectClause(SSqlCmd* pCmd) {
return; return;
} }
char* str = calloc(1, 10240); int32_t totalBufSize = 10240;
char* str = (char*)calloc(1, 10240);
if (str == NULL) return;
int32_t offset = 0; int32_t offset = 0;
offset += sprintf(str, "%d [", pCmd->exprsInfo.numOfExprs); offset += sprintf(str, "num:%d [", pCmd->exprsInfo.numOfExprs);
for (int32_t i = 0; i < pCmd->exprsInfo.numOfExprs; ++i) { for (int32_t i = 0; i < pCmd->exprsInfo.numOfExprs; ++i) {
SSqlExpr* pExpr = tscSqlExprGet(pCmd, i); SSqlExpr* pExpr = tscSqlExprGet(pCmd, i);
int32_t size = sprintf(str + offset, "%s(%d)", aAggs[pExpr->functionId].aName, pExpr->colInfo.colId); char tmpBuf[1024] = {0};
offset += size; int32_t tmpLen = 0;
tmpLen = sprintf(tmpBuf, "%s(uid:%" PRId64 ", %d)", aAggs[pExpr->functionId].aName, pExpr->uid, pExpr->colInfo.colId);
if (tmpLen + offset > totalBufSize) break;
offset += sprintf(str + offset, "%s", tmpBuf);
if (i < pCmd->exprsInfo.numOfExprs - 1) { if (i < pCmd->exprsInfo.numOfExprs - 1) {
str[offset++] = ','; str[offset++] = ',';