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From: Jan Kiszka <jan.kiszka@domain.hid>
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-core] [PATCH 5/5] RTDM: check file descriptor owner.
Date: Sun, 03 Feb 2008 23:18:16 +0100	[thread overview]
Message-ID: <47A63DA8.4020609@domain.hid> (raw)
In-Reply-To: <18340.31655.777349.789045@domain.hid>

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Gilles Chanteperdrix wrote:
> This patch makes RTDM service rtdm_context_get check the owner of a file
> descriptor. This will prevent a process to close an RTDM file descriptor
> belonging to another process.

I assume this is a safety belt against crazy applications, right? Hope
one day we can solve this via process-local FD name spaces.

I'm OK with this if you keep the API of rtdm_context_get as is and add
an internal checked service __rtdm_context_get(user_info, fd) instead.
rtdm_context_get would then call __rtdm_context_get(NULL, fd) because it
is supposed to operate on kernel file descriptors only.

Jan


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  reply	other threads:[~2008-02-03 22:18 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-02 14:11 [Xenomai-core] [PATCH 0/5] Support for select v2 Gilles Chanteperdrix
2008-02-02 14:12 ` [Xenomai-core] [PATCH 1/5] select-like services support to xenomai core Gilles Chanteperdrix
2008-02-02 14:18   ` [Xenomai-core] [PATCH 5/5] RTDM: check file descriptor owner Gilles Chanteperdrix
2008-02-03 22:18     ` Jan Kiszka [this message]
2008-02-04  6:40       ` Gilles Chanteperdrix
2008-02-02 14:14 ` [Xenomai-core] [PATCH 2/5] select-like services support to rtdm Gilles Chanteperdrix
2008-02-02 14:15 ` [Xenomai-core] [PATCH 3/5] posix skin kernel-space support for user-space select Gilles Chanteperdrix
2008-02-02 14:16 ` [Xenomai-core] [PATCH 4/5] posix skin user-space support for select Gilles Chanteperdrix
2008-02-02 14:29 ` [Xenomai-core] [PATCH 0/5] Support for select v2 Jan Kiszka
2008-02-02 14:36   ` Gilles Chanteperdrix
2008-02-02 15:12   ` Gilles Chanteperdrix
2008-02-03 22:16 ` Jan Kiszka
2008-02-04  6:34   ` Gilles Chanteperdrix
2008-02-09 15:41   ` Gilles Chanteperdrix
2008-02-09 15:58     ` Jan Kiszka

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