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Overview
| Comment: | Avoid decrementing a pointer off the front end of the buffer in OP_MakeRecord. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
153135bfb3b8f7c407ccf36571e2d4d5 |
| User & Date: | drh 2016-04-07 14:16:16 |
Context
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2016-04-07
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| 18:42 | Prevent the in-memory journal read cursor from entering an inconsistent state when it reads the last few bytes out of the journal file. Fix for ticket [7f7f8026eda38]. check-in: c4b9c611 user: drh tags: trunk | |
| 14:16 | Avoid decrementing a pointer off the front end of the buffer in OP_MakeRecord. check-in: 153135bf user: drh tags: trunk | |
| 14:05 | Instead of just commenting out the unneeded code in the previous check-in, remove it completely. check-in: 8415d484 user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
2751 2751 len -= pRec->u.nZero; 2752 2752 } 2753 2753 } 2754 2754 nData += len; 2755 2755 testcase( serial_type==127 ); 2756 2756 testcase( serial_type==128 ); 2757 2757 nHdr += serial_type<=127 ? 1 : sqlite3VarintLen(serial_type); 2758 - }while( (--pRec)>=pData0 ); 2758 + if( pRec==pData0 ) break; 2759 + pRec--; 2760 + }while(1); 2759 2761 2760 2762 /* EVIDENCE-OF: R-22564-11647 The header begins with a single varint 2761 2763 ** which determines the total number of bytes in the header. The varint 2762 2764 ** value is the size of the header in bytes including the size varint 2763 2765 ** itself. */ 2764 2766 testcase( nHdr==126 ); 2765 2767 testcase( nHdr==127 );