[ARROW-13440] [C++] UBSAN error "applying non-zero offset to null pointer"

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/29107
• Assignee: Weston Pace
• Reporter: Weston Pace
• Created: 23/Jul/21 04:25
• Updated: 11/Jan/23 08:33
• Resolved: 23/Feb/22 17:40

Description

Clang's ubsan considers a non-zero offset being added to a null pointer to be undefined behavior.  This causes ubsan violations in our test suites if you are using clang-10 or higher.

This was not detected by CI since CI uses clang-8 and this check was added in clang-10 [1][2].

 

 [1] https://reviews.llvm.org/D67122

 [2] https://releases.llvm.org/10.0.0/tools/clang/docs/ReleaseNotes.html#undefined-behavior-sanitizer-ubsan

 

Issue Links

• links to: GitHub Pull Request #10787
• links to: GitHub Pull Request #10795