Bug #106081 Missed init of m_nodes in fix_nodegroup

• Submitted: 6 Jan 2022 11:44
• Modified: 18 Nov 2022 17:57
• Reporter: Mikael Ronström
• Status: Closed
• Category: MySQL Cluster: Cluster (NDB) storage engine
• Severity: S3 (Non-critical)
• Version: 8.0.27
• OS: Any
• CPU Architecture: Any

[6 Jan 2022 11:44] Mikael Ronström

Description:
The array m_nodes set in fix_nodegroup for each bucket is not fully initialised.
This can lead to crash when uninitialised memory is used when no node exists for
a bucket. This leads to a crash instead of a missing node.

How to repeat:
Rare occurrence when running autotest.
Probably need an ERROR insert to reproduce by initing memory to bad values.

Suggested fix:
Init array to 0 before loop that sets the values.

[18 Jan 2022 12:34] MySQL Verification Team

Hi Mikael,

Thanks for the report
all best
Bogdan

[18 Nov 2022 17:57] Jon Stephens

Documented fix as follows in the NDB 7.5.29, 7.6.25, and 8.0.32 changelogs:

    Fixed an uninitialized variable in Suma.cpp.

Closed.