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Overview
| Comment: | Expand the size of the temporary page used during btree rebalancing by a few bytes, to avoid problems with small buffer overreads that can occur on corrupted database files. |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
32754ca6f86da8165e274f98f35fc3df |
| User & Date: | drh 2018-12-14 13:35:48.724 |
References
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2018-12-14
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| 16:20 | Back out the expansion of the temporary buffer size from [32754ca6f86da816] and replace it with an explicit test for buffer overreads. (check-in: 8ba3d9f380 user: drh tags: trunk) | |
Context
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2018-12-14
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| 13:47 | Fix a harmless compiler warning in Sessions. (check-in: fc9791ea98 user: drh tags: trunk) | |
| 13:35 | Expand the size of the temporary page used during btree rebalancing by a few bytes, to avoid problems with small buffer overreads that can occur on corrupted database files. (check-in: 32754ca6f8 user: drh tags: trunk) | |
| 13:18 | When saving the position of a cursor at the b-tree layer, allocate a few extra bytes at the end of the buffer used to save the key. Otherwise, if the key is corrupt, the code that restores the cursor position may overread the buffer by a little. (check-in: 160b1e31c0 user: dan tags: trunk) | |
Changes
Changes to src/pcache1.c.
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473 474 475 476 477 478 479 | 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 | + + + - + |
/*
** Malloc function used by SQLite to obtain space from the buffer configured
** using sqlite3_config(SQLITE_CONFIG_PAGECACHE) option. If no such buffer
** exists, this function falls back to sqlite3Malloc().
*/
void *sqlite3PageMalloc(int sz){
/* During rebalance operations on a corrupt database file, it is sometimes
** (rarely) possible to overread the temporary page buffer by a few bytes.
** Enlarge the allocation slightly so that this does not cause problems. */
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