[ARROW-2275] [C++] Buffer::mutable_data_ member uninitialized

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.9.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18232
• Assignee: Unassigned
• Reporter: Antoine Pitrou
• Created: 06/Mar/18 15:30
• Updated: 11/Jan/23 07:20
• Resolved: 09/Mar/18 15:24

Description

For immutable buffers (i.e. most of them), the mutable_data_ member is uninitialized. If the user calls mutable_data() by mistake on such a buffer, they will get a bogus pointer back.

This is exacerbated by the Tensor API whose const and non-const raw_data() methods return different things...

(also an idea: add a DCHECK for mutability before returning from mutable_data()?)

Issue Links

• links to: GitHub Pull Request #1717