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Overview
| Comment: | Do not allow pointer arithmetic to move a pointer across a memory allocation boundary. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
85b979319bcb8ec301ae39b36ad60348 |
| User & Date: | drh 2016-04-05 13:19:19 |
Context
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2016-04-05
| ||
| 13:35 | Use SQLITE_WITHIN() for pointer range comparisons in some testing code. check-in: 7cacf4e9 user: drh tags: trunk | |
| 13:19 | Do not allow pointer arithmetic to move a pointer across a memory allocation boundary. check-in: 85b97931 user: drh tags: trunk | |
|
2016-04-04
| ||
| 18:04 | Fix documentation typos. Comment changes only. No changes to code. check-in: d5fc2f7f user: drh tags: trunk | |
Changes
Changes to src/btree.c.
6541 6541 int iEnd = iFirst + nCell; 6542 6542 assert( CORRUPT_DB || pPg->hdrOffset==0 ); /* Never called on page 1 */ 6543 6543 for(i=iFirst; i<iEnd; i++){ 6544 6544 int sz, rc; 6545 6545 u8 *pSlot; 6546 6546 sz = cachedCellSize(pCArray, i); 6547 6547 if( (aData[1]==0 && aData[2]==0) || (pSlot = pageFindSlot(pPg,sz,&rc))==0 ){ 6548 + if( (pData - pBegin)<sz ) return 1; 6548 6549 pData -= sz; 6549 - if( pData<pBegin ) return 1; 6550 6550 pSlot = pData; 6551 6551 } 6552 6552 /* pSlot and pCArray->apCell[i] will never overlap on a well-formed 6553 6553 ** database. But they might for a corrupt database. Hence use memmove() 6554 6554 ** since memcpy() sends SIGABORT with overlapping buffers on OpenBSD */ 6555 6555 assert( (pSlot+sz)<=pCArray->apCell[i] 6556 6556 || pSlot>=(pCArray->apCell[i]+sz)