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Overview
Comment: | Detect when an attempt is made to write to a pointer map page that is also being used as a btree page and report corruption. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | fuzzcheck-fix |
Files: | files | file ages | folders |
SHA3-256: |
3036fd71ac7063359b04a0ed54a6c63a |
User & Date: | drh 2018-12-14 03:14:18.024 |
Context
2018-12-14
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03:16 | Report corruption when an attempt is made to write a pointer-map page that is also being used as a btree page. Also, fix a bug in fuzzcheck that cause it to overlook a pointer-map bug that was trigger by the fuzzcheck test data, and also fix the pointer-map bug. (check-in: cc42dd1510 user: drh tags: trunk) | |
03:14 | Detect when an attempt is made to write to a pointer map page that is also being used as a btree page and report corruption. (Closed-Leaf check-in: 3036fd71ac user: drh tags: fuzzcheck-fix) | |
02:29 | Fix a bug in the custom in-memory VFS used by fuzzcheck. This bug masks other bugs that should have caused some existing fuzzdata7.db entries to fail, and so this fix is initially on a branch until those other bugs can be repaired. (check-in: e0994e9995 user: drh tags: fuzzcheck-fix) | |
Changes
Changes to src/btree.c.
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987 988 989 990 991 992 993 994 995 996 997 998 999 1000 | return; } iPtrmap = PTRMAP_PAGENO(pBt, key); rc = sqlite3PagerGet(pBt->pPager, iPtrmap, &pDbPage, 0); if( rc!=SQLITE_OK ){ *pRC = rc; return; } offset = PTRMAP_PTROFFSET(iPtrmap, key); if( offset<0 ){ *pRC = SQLITE_CORRUPT_BKPT; goto ptrmap_exit; } assert( offset <= (int)pBt->usableSize-5 ); | > > > > > > > | 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 | return; } iPtrmap = PTRMAP_PAGENO(pBt, key); rc = sqlite3PagerGet(pBt->pPager, iPtrmap, &pDbPage, 0); if( rc!=SQLITE_OK ){ *pRC = rc; return; } if( ((char*)sqlite3PagerGetExtra(pDbPage))[0]!=0 ){ /* The first byte of the extra data is the MemPage.isInit byte. ** If that byte is set, it means this page is also being used ** as a btree page. */ *pRC = SQLITE_CORRUPT_BKPT; goto ptrmap_exit; } offset = PTRMAP_PTROFFSET(iPtrmap, key); if( offset<0 ){ *pRC = SQLITE_CORRUPT_BKPT; goto ptrmap_exit; } assert( offset <= (int)pBt->usableSize-5 ); |
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