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Overview
| Comment: | Fix a potential NULL-pointer dereference in btreeSwapOutMmap(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental-mmap |
| Files: | files | file ages | folders |
| SHA1: | e81ccdcd87a1387f7ca08d4d7c899311e2180d32 |
| User & Date: | drh 2013-03-22 19:56:27 |
Context
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2013-03-22
| ||
| 20:15 | Update wal mode tests so that they work with the mmap test permutation. check-in: f7295872 user: dan tags: experimental-mmap | |
| 19:56 | Fix a potential NULL-pointer dereference in btreeSwapOutMmap(). check-in: e81ccdcd user: drh tags: experimental-mmap | |
| 19:17 | Fix a case where the mapped part of a database file may be written during a backup operation. check-in: c8d67aef user: dan tags: experimental-mmap | |
Changes
Changes to src/btree.c.
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static int btreeSwapOutMmap(BtShared *pBt){
int rc = SQLITE_OK; /* Return code */
BtCursor *pCsr; /* Used to iterate through all open cursors */
for(pCsr=pBt->pCursor; pCsr && rc==SQLITE_OK; pCsr=pCsr->pNext){
if( pCsr->iPage>=0 ){
MemPage *pPg = pCsr->apPage[0];
if( pPg->pDbPage->flags & PGHDR_MMAP ){
MemPage *pNew = 0;
rc = getAndInitPage(pBt, pPg->pgno, &pNew, 0);
if( rc==SQLITE_OK && pCsr->iPage==0 ){
pCsr->info.pCell = pNew->aData + (pCsr->info.pCell - pPg->aData);
}
pCsr->apPage[0] = pNew;
releasePage(pPg);
|
| |
2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 |
static int btreeSwapOutMmap(BtShared *pBt){
int rc = SQLITE_OK; /* Return code */
BtCursor *pCsr; /* Used to iterate through all open cursors */
for(pCsr=pBt->pCursor; pCsr && rc==SQLITE_OK; pCsr=pCsr->pNext){
if( pCsr->iPage>=0 ){
MemPage *pPg = pCsr->apPage[0];
if( pPg && pPg->pDbPage->flags & PGHDR_MMAP ){
MemPage *pNew = 0;
rc = getAndInitPage(pBt, pPg->pgno, &pNew, 0);
if( rc==SQLITE_OK && pCsr->iPage==0 ){
pCsr->info.pCell = pNew->aData + (pCsr->info.pCell - pPg->aData);
}
pCsr->apPage[0] = pNew;
releasePage(pPg);
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