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Exempt backups below SQLite3MC's assumed legacy page size #29

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Merged
LucaCappelletti94 merged 1 commit into from
Oct 15, 2026
Merged

Exempt backups below SQLite3MC's assumed legacy page size #29

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Binary file added fuzz/corpus/findings/backup-aes128-legacy-page-size-below-legacy-page-size
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11 changes: 6 additions & 5 deletions fuzz/src/run.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -558,9 +558,9 @@ fn exercise_attached(
/// cleanly with the destination's own true key after the backup reports full success. A failure
/// there is the defect `utelle/SQLite3MultipleCiphers` issue #158 described, and exactly what this
/// harness exists to catch a recurrence of. The one identically laid out pair exempt is a
/// destination that hides its page size and is sized below 4096-byte pages by `PRAGMA page_size`
/// alone, which SQLite3MC cannot reopen at all, backup or not
/// (`upstream/sqlite3mc-rc4-short-read-skips-decryption.md`).
/// destination that hides its page size and has `PRAGMA page_size` below the page size SQLite3MC
/// assumes on reopen, `legacy_page_size` or 4096 bytes, which it cannot reopen at all, backup or
/// not (`upstream/sqlite3mc-rc4-short-read-skips-decryption.md`).
///
/// # Panics
///
Expand All @@ -587,8 +587,9 @@ pub fn run_backup(case: &BackupCase) {
&& case.src_page_size == case.dest_page_size
&& case.src.same_layout(&case.dest)
&& !(case.dest.hides_page_size()
&& case.dest.page_size.is_none()
&& case.dest_page_size.is_some_and(|size| size.get() < 4096))
&& case
.dest_page_size
.is_some_and(|size| size.get() < case.dest.page_size.unwrap_or(4096)))
{
drop(src);
drop(dest);
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