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Overview
Comment: | Make sure the translateColumnToCopy() routine in the query planner does not try to access an array that failed to be fully allocated due to a prior OOM. This fixes an issue discovered by OSSFuzz. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
3299a26160c239255608d1e2b15a221e |
User & Date: | drh 2017-03-11 13:02:59.691 |
Context
2017-03-12
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19:39 | Remove an obsolete assert() in the IN operator code generation. (check-in: 18bf6aca2a user: drh tags: trunk) | |
2017-03-11
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13:02 | Make sure the translateColumnToCopy() routine in the query planner does not try to access an array that failed to be fully allocated due to a prior OOM. This fixes an issue discovered by OSSFuzz. (check-in: 3299a26160 user: drh tags: trunk) | |
00:46 | Increase the number of significant digits in floating point literals on ".dump" output from the shell. (check-in: 7359fcacaa user: drh tags: trunk) | |
Changes
Changes to src/where.c.
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513 514 515 516 517 518 519 | ** ** If the bIncrRowid parameter is 0, then any OP_Rowid instructions on ** cursor iTabCur are transformed into OP_Null. Or, if bIncrRowid is non-zero, ** then each OP_Rowid is transformed into an instruction to increment the ** value stored in its output register. */ static void translateColumnToCopy( | | > > | 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 | ** ** If the bIncrRowid parameter is 0, then any OP_Rowid instructions on ** cursor iTabCur are transformed into OP_Null. Or, if bIncrRowid is non-zero, ** then each OP_Rowid is transformed into an instruction to increment the ** value stored in its output register. */ static void translateColumnToCopy( Parse *pParse, /* Parsing context */ int iStart, /* Translate from this opcode to the end */ int iTabCur, /* OP_Column/OP_Rowid references to this table */ int iRegister, /* The first column is in this register */ int bIncrRowid /* If non-zero, transform OP_rowid to OP_AddImm(1) */ ){ Vdbe *v = pParse->pVdbe; VdbeOp *pOp = sqlite3VdbeGetOp(v, iStart); int iEnd = sqlite3VdbeCurrentAddr(v); if( pParse->db->mallocFailed ) return; for(; iStart<iEnd; iStart++, pOp++){ if( pOp->p1!=iTabCur ) continue; if( pOp->opcode==OP_Column ){ pOp->opcode = OP_Copy; pOp->p1 = pOp->p2 + iRegister; pOp->p2 = pOp->p3; pOp->p3 = 0; |
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798 799 800 801 802 803 804 | pParse, pIdx, pLevel->iTabCur, regRecord, 0, 0, 0, 0 ); sqlite3VdbeAddOp2(v, OP_IdxInsert, pLevel->iIdxCur, regRecord); sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT); if( pPartial ) sqlite3VdbeResolveLabel(v, iContinue); if( pTabItem->fg.viaCoroutine ){ sqlite3VdbeChangeP2(v, addrCounter, regBase+n); | > > | | 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 | pParse, pIdx, pLevel->iTabCur, regRecord, 0, 0, 0, 0 ); sqlite3VdbeAddOp2(v, OP_IdxInsert, pLevel->iIdxCur, regRecord); sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT); if( pPartial ) sqlite3VdbeResolveLabel(v, iContinue); if( pTabItem->fg.viaCoroutine ){ sqlite3VdbeChangeP2(v, addrCounter, regBase+n); testcase( pParse->db->mallocFailed ); translateColumnToCopy(pParse, addrTop, pLevel->iTabCur, pTabItem->regResult, 1); sqlite3VdbeGoto(v, addrTop); pTabItem->fg.viaCoroutine = 0; }else{ sqlite3VdbeAddOp2(v, OP_Next, pLevel->iTabCur, addrTop+1); VdbeCoverage(v); } sqlite3VdbeChangeP5(v, SQLITE_STMTSTATUS_AUTOINDEX); sqlite3VdbeJumpHere(v, addrTop); |
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4916 4917 4918 4919 4920 4921 4922 | assert( pTab!=0 ); pLoop = pLevel->pWLoop; /* For a co-routine, change all OP_Column references to the table of ** the co-routine into OP_Copy of result contained in a register. ** OP_Rowid becomes OP_Null. */ | | > | | 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 | assert( pTab!=0 ); pLoop = pLevel->pWLoop; /* For a co-routine, change all OP_Column references to the table of ** the co-routine into OP_Copy of result contained in a register. ** OP_Rowid becomes OP_Null. */ if( pTabItem->fg.viaCoroutine ){ testcase( pParse->db->mallocFailed ); translateColumnToCopy(pParse, pLevel->addrBody, pLevel->iTabCur, pTabItem->regResult, 0); continue; } /* If this scan uses an index, make VDBE code substitutions to read data ** from the index instead of from the table where possible. In some cases ** this optimization prevents the table from ever being read, which can |
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