From: Al Viro <viro@ZenIV.linux.org.uk>
To: Guillaume Chazarain <guichaz@yahoo.fr>
Cc: Rik van Riel <riel@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] proc: advertise new restrictions on /proc/*/maps & /proc/*/smaps
Date: Thu, 3 Jan 2008 23:57:36 +0000 [thread overview]
Message-ID: <20080103235736.GW27894@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20080103235150.2870.31703.stgit@localhost.localdomain>
On Fri, Jan 04, 2008 at 12:51:50AM +0100, Guillaume Chazarain wrote:
> Now that strangers are kept out of /proc/<pid>/maps, let's welcome them
> with -EPERM instead of a blank file.
NAK
The whole point is that we have to reject it at read() time, not open()
time. Checks in open() are
a) useless (since conditions can change later)
and
b) actually broken, since CAP_SYS_PTRACE != CAP_DAC_OVERRIDE
next prev parent reply other threads:[~2008-01-03 23:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-03 23:51 [PATCH] proc: advertise new restrictions on /proc/*/maps & /proc/*/smaps Guillaume Chazarain
2008-01-03 23:57 ` Al Viro [this message]
2008-01-04 11:15 ` Guillaume Chazarain
2008-01-04 11:38 ` Al Viro
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