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Overview
| Comment: | If the size of the database according to the header is larger than the actual database file size, report that the database is corrupt. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8eb1f2443f2712920452b7ed3fb835c7 |
| User & Date: | drh 2010-04-02 12:46:46.000 |
Context
|
2010-04-02
| ||
| 12:55 | Take care to avoid a buffer over-read when adding a KEYINFO structure to the P4 parameter of an opcode. (check-in: 937b931a7c user: drh tags: trunk) | |
| 12:46 | If the size of the database according to the header is larger than the actual database file size, report that the database is corrupt. (check-in: 8eb1f2443f user: drh tags: trunk) | |
| 03:39 | Pager changes for code coverage testing. (check-in: b04a45ea97 user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
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2226 2227 2228 2229 2230 2231 2232 |
**
** SQLITE_OK is returned on success. If the file is not a
** well-formed database file, then SQLITE_CORRUPT is returned.
** SQLITE_BUSY is returned if the database is locked. SQLITE_NOMEM
** is returned if we run out of memory.
*/
static int lockBtree(BtShared *pBt){
| | | | > > | < | < < < | > > > | 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 |
**
** SQLITE_OK is returned on success. If the file is not a
** well-formed database file, then SQLITE_CORRUPT is returned.
** SQLITE_BUSY is returned if the database is locked. SQLITE_NOMEM
** is returned if we run out of memory.
*/
static int lockBtree(BtShared *pBt){
int rc; /* Result code from subfunctions */
MemPage *pPage1; /* Page 1 of the database file */
int nPage; /* Number of pages in the database */
int nPageFile = 0; /* Number of pages in the database file */
int nPageHeader; /* Number of pages in the database according to hdr */
assert( sqlite3_mutex_held(pBt->mutex) );
assert( pBt->pPage1==0 );
rc = sqlite3PagerSharedLock(pBt->pPager);
if( rc!=SQLITE_OK ) return rc;
rc = btreeGetPage(pBt, 1, &pPage1, 0);
if( rc!=SQLITE_OK ) return rc;
/* Do some checking to help insure the file we opened really is
** a valid database file.
*/
nPage = nPageHeader = get4byte(28+(u8*)pPage1->aData);
if( (rc = sqlite3PagerPagecount(pBt->pPager, &nPageFile))!=SQLITE_OK ){;
goto page1_init_failed;
}
if( nPage==0 ){
nPage = nPageFile;
}
if( nPage>0 ){
int pageSize;
int usableSize;
u8 *page1 = pPage1->aData;
rc = SQLITE_NOTADB;
if( memcmp(page1, zMagicHeader, 16)!=0 ){
|
| ︙ | ︙ | |||
2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 |
releasePage(pPage1);
pBt->usableSize = (u16)usableSize;
pBt->pageSize = (u16)pageSize;
freeTempSpace(pBt);
rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
pageSize-usableSize);
return rc;
}
if( usableSize<480 ){
goto page1_init_failed;
}
pBt->pageSize = (u16)pageSize;
pBt->usableSize = (u16)usableSize;
#ifndef SQLITE_OMIT_AUTOVACUUM
| > > > > | 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 |
releasePage(pPage1);
pBt->usableSize = (u16)usableSize;
pBt->pageSize = (u16)pageSize;
freeTempSpace(pBt);
rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
pageSize-usableSize);
return rc;
}
if( nPageHeader>nPageFile ){
rc = SQLITE_CORRUPT_BKPT;
goto page1_init_failed;
}
if( usableSize<480 ){
goto page1_init_failed;
}
pBt->pageSize = (u16)pageSize;
pBt->usableSize = (u16)usableSize;
#ifndef SQLITE_OMIT_AUTOVACUUM
|
| ︙ | ︙ |