[CASSANDRA-4250] Missing arrayOffset in FBUtilities.hash

• Type: Bug
• Status: Resolved
• Priority: Urgent
• Resolution: Fixed
• Fix Version/s: 1.1.1
• Severity: Critical
• Assignee: Richard Low
• Reporter: Richard Low

Authors

Richard Low

Reviewers

Sylvain Lebresne

• Created: 16/May/12 09:26
• Updated: 16/Apr/19 09:32
• Resolved: 16/May/12 09:58

Description

In CASSANDRA-3869, FBUtilities.hash was optimised to use the backing byte array if there is one. However, there is a missing +arrayOffset in the offset parameter.

This can cause incorrect hashes resulting in data going to the wrong place, etc.. I haven't observed any errors directly attributable to this so maybe we are lucky and all backing arrays start at 0 but this could cause data loss in the worst case.