From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Willy Tarreau <w@1wt.eu>
Cc: Harald Dunkel <harald.dunkel@t-online.de>,
Joe Peterson <joe@skyrush.com>,
linux-kernel@vger.kernel.org, Alan Cox <alan@redhat.com>
Subject: Re: 2.6.25.3: su gets stuck for root
Date: Mon, 2 Jun 2008 09:10:16 +0100 [thread overview]
Message-ID: <20080602091016.571dda7c@core> (raw)
In-Reply-To: <20080602053256.GF5609@1wt.eu>
> Guys, you should test if "kill -CONT $pid" wakes the process up.
> It might be possible that some obscure bug appeared in the tty
> code resulting in SIGTTOU sometimes being sent to the caller,
> although that seems rather strange :-/
Not really. The task would get suspended if it attempted to change the
tty settings while not being session leader. This is part of the POSIX
and BSD job control. A race (either kernel or in something like
sshd/bash) would do that and could have been caused by any of the timing
changes recently.
That would also explain why I can't duplicate it, and the sleep
observation.
next prev parent reply other threads:[~2008-06-02 8:26 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-02 1:31 2.6.25.3: su gets stuck for root Joe Peterson
2008-06-02 5:12 ` Harald Dunkel
2008-06-02 5:32 ` Willy Tarreau
2008-06-02 5:55 ` Joe Peterson
2008-06-02 8:10 ` Alan Cox [this message]
2008-06-02 9:01 ` David Newall
2008-06-02 9:20 ` Alan Cox
2008-06-02 10:16 ` Vegard Nossum
2008-06-02 10:39 ` Vegard Nossum
2008-06-02 10:52 ` Alan Cox
2008-06-02 10:57 ` Vegard Nossum
2008-06-02 12:28 ` Alan Cox
2008-06-02 14:31 ` Vegard Nossum
2008-06-02 10:50 ` Alan Cox
2008-06-17 15:32 ` Joe Peterson
2008-06-02 15:26 ` Joe Peterson
2008-06-02 15:51 ` Alan Cox
2008-06-02 16:03 ` Joe Peterson
2008-06-04 14:43 ` Joe Peterson
2008-06-04 15:16 ` Alan Cox
2008-06-04 16:52 ` Joe Peterson
2008-06-04 17:10 ` Alan Cox
2008-06-04 20:32 ` Joe Peterson
2008-06-11 14:04 ` Joe Peterson
2008-06-12 11:52 ` Vegard Nossum
2008-06-14 1:49 ` Joe Peterson
2008-06-14 7:45 ` Vegard Nossum
2008-06-14 17:43 ` Joe Peterson
2008-06-14 20:34 ` Vegard Nossum
2008-06-14 20:52 ` Joe Peterson
2008-06-14 21:26 ` Vegard Nossum
2008-06-14 21:34 ` Joe Peterson
2008-07-02 18:03 ` tty session leader issue (was Re: 2.6.25.3: su gets stuck for root) Joe Peterson
2008-07-02 19:21 ` markus reichelt
2008-07-06 14:08 ` Tim Connors
2008-07-06 16:44 ` Alan Cox
2008-07-06 18:49 ` tty session leader issue [cause now known!] " Joe Peterson
2008-06-02 5:42 ` 2.6.25.3: su gets stuck for root Joe Peterson
-- strict thread matches above, loose matches on Subject: below --
2008-05-13 6:17 Harald Dunkel
2008-05-13 6:47 ` Vegard Nossum
2008-05-13 17:43 ` Harald Dunkel
2008-05-13 19:46 ` Willy Tarreau
2008-05-14 4:55 ` Harald Dunkel
2008-05-14 5:46 ` Willy Tarreau
2008-05-14 7:34 ` Vegard Nossum
2008-05-14 17:05 ` Harald Dunkel
2008-05-14 17:17 ` Vegard Nossum
2008-05-14 17:35 ` Alan Cox
2008-05-18 17:56 ` Harald Dunkel
2008-05-18 17:51 ` Alan Cox
2008-05-20 19:01 ` Harald Dunkel
2008-05-20 19:12 ` david
2008-05-20 20:26 ` Harald Dunkel
2008-05-20 20:38 ` Willy Tarreau
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