glibc/tests/Regression/bz522528-pthread-join-hangs-if-a-thread-calls-setuid/PURPOSE
Sergey Kolosov ab4bc8a24e Extend the test coverage
Move some of the RHEL QE testcases upstream to Fedora.
2022-05-31 09:29:27 +02:00

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PURPOSE of /tools/glibc/Regression/bz522528-pthread-join-hangs-if-a-thread-calls-setuid
Description: Test for bz522528 (pthread_join() hangs if a thread calls setuid())
Author: Petr Muller <pmuller@redhat.com>
Bug summary: pthread_join() hangs if a thread calls setuid()
Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=522528
Description:
Created an attachment (id=360523)
reproducer's source file
Description of problem:
When a program creates a thread which calls setuid() and terminates, the other
thread trying to wait for it hangs.
Version-Release number of selected component (if applicable):
RHEL5 (2.5-34), also RHEL4 and the newest upstream sources
How reproducible:
always
Steps to Reproduce:
1. Compile attached source file of reproducer:
$ gcc -o reproducer reproducer.c -lpthread
2. and run it:
$ ./reproducer
Actual results:
program hangs
Expected results:
program should end without hanging
Additional info:
This bug has appeared quite a long ago, you can find it in a sourceware BZ with existing patch at:
http://sources.redhat.com/bugzilla/show_bug.cgi?id=3270#c2
The patch solves the problem, but I have no idea why this hasn't been applied in the upstream already. I have attached a slightly modiffied version of the patch to be able to be applied and built on RHEL5 glibc sources and it works and solves the problem.
There is also existing BZ for RHEL4:
https://bugzilla.redhat.com/show_bug.cgi?id=248671