linux-kernel - 2.6.25.3: su gets stuck for root

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Date:	Tue, 13 May 2008 08:17:14 +0200
From:	Harald Dunkel <harald.dunkel@...nline.de>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.25.3: su gets stuck for root

Hi folks,

I haven't seen it mentioned here (hopefully I wasn't too blind to see):

If I run "su someuser" as root, then it gets stuck. No prompt. I cannot
interrupt it with ^C or ^Z either. /var/log/auth.log says:

May 13 08:06:41 pluto su[4193]: Successful su for root by harri
May 13 08:06:41 pluto su[4193]: + pts/3 harri:root
May 13 08:06:41 pluto su[4193]: pam_unix(su:session): session opened for user root by harri(uid=1000)

ps shows:

% ps -ef | grep pts/3
harri     4007  4006  0 07:58 pts/3    00:00:00 bash
root      4193  4007  0 08:06 pts/3    00:00:00 su
root      4194  4193  0 08:06 pts/3    00:00:00 bash
root      4209  4194  0 08:08 pts/3    00:00:00 su
root      4210  4209  0 08:08 pts/3    00:00:00 bash
root      4217  4210  0 08:08 pts/3    00:00:00 stty intr ^C

So obviously 'stty' is to blame here (called from root's .bashrc, as
it seems). But for 2.6.24.4 there is no such problem.


Maybe you could spread some light here?


Regards

Harri

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