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Overview
| Comment: | Fix a buffer overrun in the code for handling IN(...) operators when the LHS of the operator contains indexed columns or expressions. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | rowvalue |
| Files: | files | file ages | folders |
| SHA1: |
f41a0391b732a8c4ad188163f34a0f4a |
| User & Date: | dan 2016-08-24 12:22:17 |
Context
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2016-08-24
| ||
| 15:37 | Add a NEVER() on an unreachable branch in comparisonAffinity(). check-in: 505a2f20 user: drh tags: rowvalue | |
| 12:22 | Fix a buffer overrun in the code for handling IN(...) operators when the LHS of the operator contains indexed columns or expressions. check-in: f41a0391 user: dan tags: rowvalue | |
| 00:51 | The previous OOM fix was bad. Back it out and replace it with a better one. check-in: 1e3bc369 user: drh tags: rowvalue | |
Changes
Changes to src/wherecode.c.
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pLevel->u.in.aInLoop =
sqlite3DbReallocOrFree(pParse->db, pLevel->u.in.aInLoop,
sizeof(pLevel->u.in.aInLoop[0])*pLevel->u.in.nIn);
pIn = pLevel->u.in.aInLoop;
if( pIn ){
int iMap = 0; /* Index in aiMap[] */
pIn += i;
for(i=iEq;i<pLoop->nLTerm; i++, pIn++){
int iOut = iReg;
if( pLoop->aLTerm[i]->pExpr==pX ){
if( eType==IN_INDEX_ROWID ){
assert( nEq==1 && i==iEq );
pIn->addrInTop = sqlite3VdbeAddOp2(v, OP_Rowid, iTab, iReg);
}else{
int iCol = aiMap ? aiMap[iMap++] : 0;
................................................................................
sqlite3VdbeAddOp1(v, OP_IsNull, iOut); VdbeCoverage(v);
if( i==iEq ){
pIn->iCur = iTab;
pIn->eEndLoopOp = bRev ? OP_PrevIfOpen : OP_NextIfOpen;
}else{
pIn->eEndLoopOp = OP_Noop;
}
}
}
}else{
pLevel->u.in.nIn = 0;
}
sqlite3DbFree(pParse->db, aiMap);
#endif
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pLevel->u.in.aInLoop =
sqlite3DbReallocOrFree(pParse->db, pLevel->u.in.aInLoop,
sizeof(pLevel->u.in.aInLoop[0])*pLevel->u.in.nIn);
pIn = pLevel->u.in.aInLoop;
if( pIn ){
int iMap = 0; /* Index in aiMap[] */
pIn += i;
for(i=iEq;i<pLoop->nLTerm; i++){
int iOut = iReg;
if( pLoop->aLTerm[i]->pExpr==pX ){
if( eType==IN_INDEX_ROWID ){
assert( nEq==1 && i==iEq );
pIn->addrInTop = sqlite3VdbeAddOp2(v, OP_Rowid, iTab, iReg);
}else{
int iCol = aiMap ? aiMap[iMap++] : 0;
................................................................................
sqlite3VdbeAddOp1(v, OP_IsNull, iOut); VdbeCoverage(v);
if( i==iEq ){
pIn->iCur = iTab;
pIn->eEndLoopOp = bRev ? OP_PrevIfOpen : OP_NextIfOpen;
}else{
pIn->eEndLoopOp = OP_Noop;
}
pIn++;
}
}
}else{
pLevel->u.in.nIn = 0;
}
sqlite3DbFree(pParse->db, aiMap);
#endif
|
Changes to test/rowvalue.test.
215 216 217 218 219 220 221 222 223 |
2 "(a, b) > (2, 2)" {3 4 5}
3 "(a, b) < (4, 5)" {1 2 3 4}
4 "(a, b) < (4, 3)" {1 2 3}
} {
do_execsql_test 9.$tn "SELECT c FROM t2 WHERE $q" $res
}
finish_test
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> > > > > > > > > |
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 |
2 "(a, b) > (2, 2)" {3 4 5}
3 "(a, b) < (4, 5)" {1 2 3 4}
4 "(a, b) < (4, 3)" {1 2 3}
} {
do_execsql_test 9.$tn "SELECT c FROM t2 WHERE $q" $res
}
do_execsql_test 10.0 {
CREATE TABLE dual(dummy); INSERT INTO dual(dummy) VALUES('X');
CREATE TABLE t3(a TEXT,b TEXT,c TEXT,d TEXT,e TEXT,f TEXT);
CREATE INDEX t3x ON t3(b,c,d,e,f);
SELECT a FROM t3
WHERE (c,d) IN (SELECT 'c','d' FROM dual)
AND (a,b,e) IN (SELECT 'a','b','d' FROM dual);
}
finish_test
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