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From: Oleg Nesterov <oleg@redhat.com>
To: "Dmitry ADAMUSHKA (EXT)" <dmitry.adamushka_ext@softathome.com>
Cc: Ingo Molnar <mingo@elte.hu>, Ralf Baechle <ralf@linux-mips.org>,
	wouter cloetens <wouter.cloetens@softathome.com>,
	linux-kernel@vger.kernel.org,
	Dmitry Adamushko <dmitry.adamushko@gmail.com>
Subject: Re: 'khelper' (child) is stuck in endless loop: do_signal() and !user_mode(regs)
Date: Thu, 8 Mar 2012 17:08:43 +0100	[thread overview]
Message-ID: <20120308160843.GA12204@redhat.com> (raw)
In-Reply-To: <1382936138.61931.1331222140282.JavaMail.root@storentr1.softathome.com>

On 03/08, Dmitry ADAMUSHKA (EXT) wrote:
>
> And to simplify a real-life test case: it's enough for khelper's child task,
> while it's running in ____call_usermodehelper(), to receive SIGKILL.
> In this case, do_execve_common() will fail - there are a number of
> fatal_signal_pending(current) checks in there.

Actually there is no difference, SIGUSR1 equally kills the task and
makes fatal_signal_pending() true. The handler is SIG_DFL after
flush_signal_handlers(), complete_signal() adds SIGKILL implicitely.

Not that this actually matters.

Oleg.


  reply	other threads:[~2012-03-08 16:16 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAO6Zf6C+SDZ-TV12wr9oiO6HB-itQ6fLPHFugXk0osEiAxW22w@mail.gmail.com>
2012-03-08 15:12 ` 'khelper' (child) is stuck in endless loop: do_signal() and !user_mode(regs) Dmitry ADAMUSHKA (EXT)
2012-03-08 15:55   ` Dmitry ADAMUSHKA (EXT)
2012-03-08 16:08     ` Oleg Nesterov [this message]
2012-03-08 16:29   ` Oleg Nesterov
2012-03-08 16:58     ` Dmitry ADAMUSHKA (EXT)
2012-03-12 16:35       ` Dmitry ADAMUSHKA (EXT)
2012-03-12 18:00         ` Oleg Nesterov
     [not found] <139779962.60750.1331202718116.JavaMail.root@storentr1.softathome.com>
2012-03-08 10:37 ` Dmitry ADAMUSHKA (EXT)
2012-03-08 15:46   ` Oleg Nesterov
     [not found] <1144797072.59663.1331142646789.JavaMail.root@storentr1.softathome.com>
2012-03-07 17:51 ` Dmitry ADAMUSHKA (EXT)
2012-03-07 18:46   ` Oleg Nesterov
2012-03-07 20:05     ` Dmitry Adamushko

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