Bug 496293 - GDM hanging on authentication right after login (with 2.6.29 kernel)
GDM hanging on authentication right after login (with 2.6.29 kernel)
Product: Fedora
Classification: Fedora
Component: thinkfinger (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Orphan Owner
Fedora Extras Quality Assurance
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Reported: 2009-04-17 12:19 EDT by Denis Leroy
Modified: 2009-12-18 04:16 EST (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2009-12-18 04:16:19 EST
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Description Denis Leroy 2009-04-17 12:19:26 EDT
The 2.6.29 kernel upgrade has caused a GDM regression for me with F-10. This is on a T61 (nVidia Quadrio NVS 140M graphics chip). Booting with 2.6.27 doesn't trigger the problem.

The login process seems to hang right after entering the password. Using gdb to attach to the process, it seems /usr/libexec/gdm-session-worker crashed in the pam library during a realloc() call, seemingly because of a memory corruption issue. (realloc call at pam_modutil_getpwnam.c:41). The problem doesn't always occur, about 50% of the time.
Comment 1 Eric Sandeen 2009-04-17 12:50:19 EDT
Just to double check, do you also have the proprietary nvidia driver, or is this with an untainted kernel?
Comment 2 Denis Leroy 2009-04-17 13:23:54 EDT
The problem occurs in both scenarios (with nv and nvidia).
Comment 3 Denis Leroy 2009-04-18 11:27:25 EDT
Is there any way to run gdm-session-worker stand-alone with the right environment variables and arguments, which would give me a chance to run it under valgrind ?

I'm going to upgrade to F-11 fairly quickly, so I may not be able to reproduce this in the future...
Comment 4 Denis Leroy 2009-04-18 12:41:26 EDT
The culprit is thinkfinger (my T61 has a fingerprint scanner). Its pam module is crashing during authentication from gdm-session-worker. Uninstalling thinkfinger fixed it.
Comment 5 James Cassell 2009-04-18 17:11:01 EDT
(In reply to comment #4)
> The culprit is thinkfinger (my T61 has a fingerprint scanner). Its pam module
> is crashing during authentication from gdm-session-worker. Uninstalling
> thinkfinger fixed it.  

I was afraid of this; I remember seeing thinkfinger being orphaned ( https://www.redhat.com/archives/fedora-devel-list/2008-December/msg00165.html )

I haven't noticed crashing, but on my machine, it just hangs for a while (as much as 30 seconds) before letting me in.
Comment 6 Bug Zapper 2009-11-18 04:12:58 EST
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 10.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
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Comment 7 Bug Zapper 2009-12-18 04:16:19 EST
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
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