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Type:
Bug
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Block Cache
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None
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Storage Engines, Storage Engines - Persistence
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None
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None
When a page is returned from the block cache, it should always be a copy, not the actual instance from the cache.
If the data is neither encrypted nor compressed, the user may (or will) get a reference to the original cache content instead of a copy.
This code:
if (!expect_conversion) {
/* Copy to the caller's buffer before releasing our reference. */
WT_ERR(__wt_buf_set(session, buf, ip->data, ip->size));
goto verify;
}
is intended to create a copy, but if ip == buf, the copy isn't performed.