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Overview
Comment:Fix a possible null pointer deref following OOM. Discovered by dbsqlfuzz.
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SHA3-256: cc888878ea8d5bc754c69de523819d32d6d9853857e31d7287f9dbfd723428db
User & Date: drh 2020-06-26 04:34:28
Context
2020-06-26
15:32
Add the ieee754_to_blob() and ieee754_from_blob() functions. Fix the handling of subnormal forms in the two-argument version of ieee754(). (check-in: c78cbf2e86 user: drh tags: trunk)
04:34
Fix a possible null pointer deref following OOM. Discovered by dbsqlfuzz. (check-in: cc888878ea user: drh tags: trunk)
2020-06-25
23:21
Update the showlocks utility program so that it functions on files with a huge number of locks without overflowing the stack. (check-in: adb7484f93 user: drh tags: trunk)
Changes
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Changes to src/expr.c.

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    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS:
    case TK_SELECT: {
      int nCol;
      testcase( op==TK_EXISTS );
      testcase( op==TK_SELECT );


      if( op==TK_SELECT && (nCol = pExpr->x.pSelect->pEList->nExpr)!=1 ){
        sqlite3SubselectError(pParse, nCol, 1);
      }else{
        return sqlite3CodeSubselect(pParse, pExpr);
      }
      break;
    }
    case TK_SELECT_COLUMN: {







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    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS:
    case TK_SELECT: {
      int nCol;
      testcase( op==TK_EXISTS );
      testcase( op==TK_SELECT );
      if( pParse->db->mallocFailed ){
        return 0;
      }else if( op==TK_SELECT && (nCol = pExpr->x.pSelect->pEList->nExpr)!=1 ){
        sqlite3SubselectError(pParse, nCol, 1);
      }else{
        return sqlite3CodeSubselect(pParse, pExpr);
      }
      break;
    }
    case TK_SELECT_COLUMN: {

Changes to test/fuzzdata8.db.

cannot compute difference between binary files