Todd Lipcon created KUDU-2085:
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Summary: Seek past last element of a prefix-encoded binary block
may crash
Key: KUDU-2085
URL: https://issues.apache.org/jira/browse/KUDU-2085
Project: Kudu
Issue Type: Bug
Components: cfile
Affects Versions: 1.4.0, 1.3.1, 1.2.0, 1.1.0, 1.0.1
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Critical
Similar to KUDU-2049, the binary prefix block encoder has a bug when seeking
past the end of the block (i.e to the offset past the last element). The bug
only causes issues in very specific circumstances:
- the number of elements in the block has to be a multiple of 16 (the "restart
interval")
-- this causes the code to interpret the "restart count" at the end of the
block data as an offset instead of part of the footer.
- this value, when interpreted as an offset, points to a piece of data in the
block which, when interpreted as a varint, ends up large enough to point past
the end of the block.
This results in an error like:
F0730 09:56:07.291882 124055 binary_prefix_block.cc:325] Check failed: _s.ok()
Bad status: Corruption: Could not decode value length data at idx 32
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