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Overview
| Comment: | Early detection out-of-bounds page numbers on the direct-overflow-read optimization gives consistent error messages regardless of whether or not the optimization is enabled. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
b517a52fa36df0a0854a75858b5e8186 |
| User & Date: | drh 2019-08-15 00:04:44 |
Context
|
2019-08-15
| ||
| 13:17 | Ensure that the cell overwrite optimization does not overwrite the header of the b-tree page. check-in: 4cc5694c user: drh tags: trunk | |
| 00:04 | Early detection out-of-bounds page numbers on the direct-overflow-read optimization gives consistent error messages regardless of whether or not the optimization is enabled. check-in: b517a52f user: drh tags: trunk | |
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2019-08-14
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| 15:17 | Always check for reads past the end of the file on the in-memory journal driver. This used to be an assert(). check-in: 4d41ca7d user: drh tags: trunk | |
Changes
Changes to src/btree.c.
4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 |
){
sqlite3_file *fd = sqlite3PagerFile(pBt->pPager);
u8 aSave[4];
u8 *aWrite = &pBuf[-4];
assert( aWrite>=pBufStart ); /* due to (6) */
memcpy(aSave, aWrite, 4);
rc = sqlite3OsRead(fd, aWrite, a+4, (i64)pBt->pageSize*(nextPage-1));
nextPage = get4byte(aWrite);
memcpy(aWrite, aSave, 4);
}else
#endif
{
DbPage *pDbPage;
|
> |
4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 |
){
sqlite3_file *fd = sqlite3PagerFile(pBt->pPager);
u8 aSave[4];
u8 *aWrite = &pBuf[-4];
assert( aWrite>=pBufStart ); /* due to (6) */
memcpy(aSave, aWrite, 4);
rc = sqlite3OsRead(fd, aWrite, a+4, (i64)pBt->pageSize*(nextPage-1));
if( rc && nextPage>pBt->nPage ) rc = SQLITE_CORRUPT_BKPT;
nextPage = get4byte(aWrite);
memcpy(aWrite, aSave, 4);
}else
#endif
{
DbPage *pDbPage;
|