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From: David Howells <dhowells@redhat.com>
To: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Cc: dhowells@redhat.com, keyrings@linux-nfs.org, security@kernel.org,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/1][BUG][IMPORTANT] KEYRINGS: find_keyring_by_name() can gain the freed keyring
Date: Fri, 23 Apr 2010 09:39:04 +0100	[thread overview]
Message-ID: <17087.1272011944@redhat.com> (raw)
In-Reply-To: <20100422163633.de233f25.toshi.okajima@jp.fujitsu.com>

Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> wrote:

> #!/bin/sh
> 
> LOOP=100000
> USER=dummy_user
> # add
> /bin/su -c "exit;" $USER || { /usr/sbin/adduser -m $USER; add=1; }
> 
> for ((i=0; i<LOOP; i++))
> do
>         /bin/su -c "echo '$i' > /dev/null" $USER
> done
> 
> # del
> (( add == 1 )) && /usr/sbin/userdel -r $USER
> exit

Doing:

	for ((i=0; i<100000; i++)); do keyctl session wibble /bin/true || break; done

ought to work too.

David

      reply	other threads:[~2010-04-23  8:39 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-22  7:36 [PATCH 0/1][BUG][IMPORTANT] KEYRINGS: find_keyring_by_name() can gain the freed keyring Toshiyuki Okajima
2010-04-23  8:39 ` David Howells [this message]

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