From: Frederic Weisbecker <fweisbec@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
Subject: Re: fork() && ftrace_graph_exit_task()
Date: Mon, 25 May 2009 00:16:16 +0200 [thread overview]
Message-ID: <20090524221615.GG6471@nowhere> (raw)
In-Reply-To: <20090521195330.GA13604@redhat.com>
On Thu, May 21, 2009 at 09:53:30PM +0200, Oleg Nesterov wrote:
> What if the task with ->ret_stack != NULL calls fork(), and
> copy_prcoess() fails after successfull dup_task_struct() ?
>
> bad_fork_free: -> free_task()->ftrace_graph_exit_task() will
> free the parent's ->ret_stack copied by arch_dup_task_struct(),
> no?
>
> Oleg.
>
Good catch, that's a rare situation but very dangerous.
I will fix it, thanks for your report!
Frederic.
prev parent reply other threads:[~2009-05-24 22:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-21 19:53 fork() && ftrace_graph_exit_task() Oleg Nesterov
2009-05-24 22:16 ` Frederic Weisbecker [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090524221615.GG6471@nowhere \
--to=fweisbec@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=oleg@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.