Bug #92040 TSAN: Data race in safe_mutex implementation

Submitted: 16 Aug 2018 10:45 Modified: 29 Aug 2018 18:15
Reporter: Jon Olav Hauglid Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Compiling Severity:S3 (Non-critical)
Version:8.0.14 OS:Any
Assigned to: CPU Architecture:Any

[16 Aug 2018 10:45] Jon Olav Hauglid 
Description:
Thread Sanitizer reveals that the safe_mutex_assert_owner() and safe_mutex_assert_not_owner()
functions are not thread safe as they inspect members of the safe_mutex_t struct without
holding the protecting mutex.

This only has consequences for debug builds as safe_mutex is not used for release builds.

How to repeat:
Run pretty much any MTR test on server built with WITH_TSAN.
[29 Aug 2018 18:15] Paul DuBois 
Posted by developer:
 
Fixed in 8.0.14.

Data races discovered by Thread Sanitizer in Event_queue::lock_data
and the SAFE_MUTEX implementation were fixed.

Portions of this website are copyright © 2001, 2002 The PHP Group

Page generated in 0.047 sec. using MySQL 8.4.7-u6-cloud

Timestamp references displayed by the system are UTC.
Content reproduced on this site is the property of the respective copyright holders.
It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.