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Overview
| Comment: | Allocate a few extra bytes for the pager temp page as an overrun buffer while processing corrupt database files. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
e7aca0714bc475e04b16e9db78722ce0 |
| User & Date: | drh 2019-02-26 17:49:07 |
Context
|
2019-02-26
| ||
| 17:52 | New test cases added to test/fuzzdata8.db. (check-in: 61fdfc57b9 user: drh tags: trunk) | |
| 17:49 | Allocate a few extra bytes for the pager temp page as an overrun buffer while processing corrupt database files. (check-in: e7aca0714b user: drh tags: trunk) | |
| 16:17 | Use unsigned integers to count the number of pages in a freelist during an integrity_check, to avoid any possibility of a signed integer overflow. (check-in: 05b87e0755 user: drh tags: trunk) | |
Changes
Changes to src/pager.c.
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char *pNew = NULL; /* New temp space */
i64 nByte = 0;
if( pPager->eState>PAGER_OPEN && isOpen(pPager->fd) ){
rc = sqlite3OsFileSize(pPager->fd, &nByte);
}
if( rc==SQLITE_OK ){
pNew = (char *)sqlite3PageMalloc(pageSize);
if( !pNew ) rc = SQLITE_NOMEM_BKPT;
}
if( rc==SQLITE_OK ){
pager_reset(pPager);
rc = sqlite3PcacheSetPageSize(pPager->pPCache, pageSize);
}
if( rc==SQLITE_OK ){
|
> > | > | > > > |
3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 |
char *pNew = NULL; /* New temp space */
i64 nByte = 0;
if( pPager->eState>PAGER_OPEN && isOpen(pPager->fd) ){
rc = sqlite3OsFileSize(pPager->fd, &nByte);
}
if( rc==SQLITE_OK ){
/* 8 bytes of zeroed overrun space is sufficient so that the b-tree
* cell header parser will never run off the end of the allocation */
pNew = (char *)sqlite3PageMalloc(pageSize+8);
if( !pNew ){
rc = SQLITE_NOMEM_BKPT;
}else{
memset(pNew+pageSize, 0, 8);
}
}
if( rc==SQLITE_OK ){
pager_reset(pPager);
rc = sqlite3PcacheSetPageSize(pPager->pPCache, pageSize);
}
if( rc==SQLITE_OK ){
|