Bug 85270 - dlsym is not thread safe
Summary: dlsym is not thread safe
Alias: None
Product: Red Hat Public Beta
Classification: Retired
Component: glibc
Version: phoebe
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Ulrich Drepper
QA Contact: Brian Brock
Depends On:
Blocks: 79578 84358
TreeView+ depends on / blocked
Reported: 2003-02-27 04:26 UTC by Ulrich Drepper
Modified: 2016-11-24 15:19 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2003-02-28 02:56:05 UTC

Attachments (Terms of Use)
Test program showing the crash (639 bytes, text/plain)
2003-02-27 04:27 UTC, Ulrich Drepper
no flags Details
Patch to fix the problem (1.59 KB, patch)
2003-02-27 04:28 UTC, Ulrich Drepper
no flags Details | Diff

Description Ulrich Drepper 2003-02-27 04:26:20 UTC
Description of problem:

Using dlsym in different threads at the same time can and will corrupt the stack
and cause a problem to crash if the dlsym() lookup failed.

Version-Release number of selected component (if applicable):


How reproducible:

Run attached program.  Test code by Hui Huang from Sun.

Steps to Reproduce:
1. run the program, perhaps multiple times
Actual results:


Expected results:

no crash, no output

Additional info:

Comment 1 Ulrich Drepper 2003-02-27 04:27:36 UTC
Created attachment 90392 [details]
Test program showing the crash

Test program written by Hui Huang.

Comment 2 Ulrich Drepper 2003-02-27 04:28:44 UTC
Created attachment 90393 [details]
Patch to fix the problem

Patc relative to official CVS sources as of 2002-02-26T20:20:00-0800.

Comment 3 Ulrich Drepper 2003-02-27 04:56:18 UTC
Waiting for fix to show up in rawhide.

Comment 4 Bill Nottingham 2003-02-27 17:39:22 UTC
Fixed in 2.3.2-5.

Comment 5 Jay Turner 2003-02-28 02:56:05 UTC
Fix confirmed in latest packages.

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