Bug 85270 - dlsym is not thread safe
Summary: dlsym is not thread safe
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Red Hat Public Beta
Classification: Retired
Component: glibc
Version: phoebe
Hardware: i686
OS: Linux
high
high
Target Milestone: ---
Assignee: Ulrich Drepper
QA Contact: Brian Brock
URL:
Whiteboard:
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:
Environment:
Last Closed: 2003-02-28 02:56:05 UTC
Embargoed:

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
View All

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):

glibc-2.3.2-2

How reproducible:

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


Steps to Reproduce:
1. run the program, perhaps multiple times
2.
3.
    
Actual results:

crashes

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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