Bug 743027

Summary: deadlock when logging out (malloc(): smallbin double linked list corrupted)
Product: [Fedora] Fedora Reporter: Ian Collier <imc>
Component: gnome-sessionAssignee: Ray Strode [halfline] <rstrode>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 15CC: jmccann, rstrode
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Last Closed: 2012-08-07 18:30:39 UTC Type: ---
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Description Flags
Backtrace of deadlocked gnome-session process none

Description Ian Collier 2011-10-03 16:02:28 UTC 
Sometimes when a user logs out of GNOME the session becomes responsive instead of logging out.

When this happens, gnome-session is stuck in a futex() call and the user's .xsession-errors file mentions finding a corrupted double-linked list.  The deadlock appears to be because the process of printing the error during a call to realloc is calling dlopen and then malloc again, which is not allowed.  A backtrace is attached.

So the problem seems to be in both (a) gnome-session, which has a memory corruption somewhere, and (b) glibc, which shouldn't deadlock while trying to print the error message.

Version-Release number of selected component (if applicable):
glibc-2.14-5.x86_64
gnome-session-3.0.1-2.fc15.x86_64

How reproducible:
Unknown, but in a lab of 35 machines four ended up locked up

Steps to Reproduce:
1. Log out of GNOME session.
  
Actual results:
Session stops responding

Expected results:
Session should log out
Comment 1 Ian Collier 2011-10-03 16:03:13 UTC 
Created attachment 526092 [details]
Backtrace of deadlocked gnome-session process
Comment 2 Fedora End Of Life 2012-08-07 18:30:41 UTC 
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