From: Andrew Morton <akpm@linux-foundation.org>
To: Mathias Krause <minipli@googlemail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-mm@kvack.org, security@kernel.org,
"H. Peter Anvin" <hpa@zytor.com>,
Mike Waychison <mikew@google.com>Thomas Gleixner
<tglx@linutronix.de>, Michael Davidson <md@google.com>,
"Luck, Tony" <tony.luck@intel.com>,
Roland McGrath <roland@redhat.com>,
James Morris <jmorris@namei.org>
Subject: Re: [Security] DoS on x86_64
Date: Thu, 28 Jan 2010 00:18:02 -0800 [thread overview]
Message-ID: <20100128001802.8491e8c1.akpm@linux-foundation.org> (raw)
In-Reply-To: <144AC102-422A-4AA3-864D-F90183837EA3@googlemail.com>
On Thu, 28 Jan 2010 08:34:02 +0100 Mathias Krause <minipli@googlemail.com> wrote:
> I found by accident an reliable way to panic the kernel on an x86_64
> system. Since this one can be triggered by an unprivileged user I
> CCed security@kernel.org. I also haven't found a corresponding bug on
> bugzilla.kernel.org. So, what to do to trigger the bug:
>
> 1. Enable core dumps
> 2. Start an 32 bit program that tries to execve() an 64 bit program
> 3. The 64 bit program cannot be started by the kernel because it
> can't find the interpreter, i.e. execve returns with an error
> 4. Generate a segmentation fault
> 5. panic
hrm, isn't this the same as "failed exec() leaves caller with incorrect
personality", discussed in December? afacit nothing happened as a result
of that.
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next prev parent reply other threads:[~2010-01-28 8:20 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-28 7:34 DoS on x86_64 Mathias Krause
2010-01-28 8:18 ` Andrew Morton [this message]
2010-01-28 15:41 ` [Security] " H. Peter Anvin
2010-01-28 22:33 ` Linus Torvalds
2010-01-28 22:47 ` Mathias Krause
2010-01-28 22:47 ` H. Peter Anvin
2010-01-28 23:09 ` Linus Torvalds
2010-01-28 23:27 ` H. Peter Anvin
2010-01-28 23:46 ` Linus Torvalds
2010-01-29 4:43 ` Linus Torvalds
2010-01-29 4:43 ` [PATCH 1/2] Split 'flush_old_exec' into two functions Linus Torvalds
2010-01-29 4:47 ` [PATCH 2/2] x86: get rid of the insane TIF_ABI_PENDING bit Linus Torvalds
2010-01-29 5:17 ` [PATCH 1/2] Split 'flush_old_exec' into two functions H. Peter Anvin
2010-01-29 5:05 ` [Security] DoS on x86_64 H. Peter Anvin
2010-01-29 5:29 ` H. Peter Anvin
2010-01-29 5:34 ` [PATCH 1/2] Split 'flush_old_exec' into two functions H. Peter Anvin
2010-01-29 5:34 ` [PATCH 2/2] x86: get rid of the insane TIF_ABI_PENDING bit H. Peter Anvin
2010-01-29 5:36 ` [PATCH 1/2] Split 'flush_old_exec' into two functions H. Peter Anvin
2010-01-29 5:36 ` [PATCH 2/2] x86: get rid of the insane TIF_ABI_PENDING bit H. Peter Anvin
2010-01-29 5:41 ` [PATCH 1/2] Split 'flush_old_exec' into two functions H. Peter Anvin
2010-01-29 5:41 ` [PATCH 2/2] x86: get rid of the insane TIF_ABI_PENDING bit H. Peter Anvin
2010-01-29 5:44 ` H. Peter Anvin
2010-01-29 6:14 ` [PATCH 1/2] Split 'flush_old_exec' into two functions H. Peter Anvin
2010-01-29 6:14 ` [PATCH 2/2] x86: get rid of the insane TIF_ABI_PENDING bit H. Peter Anvin
2010-01-28 23:06 ` [Security] DoS on x86_64 Linus Torvalds
2010-01-28 23:14 ` H. Peter Anvin
2010-01-28 21:31 ` Mathias Krause
2010-01-28 17:10 ` Linus Torvalds
2010-01-28 21:49 ` Mathias Krause
2010-01-28 21:58 ` Linus Torvalds
2010-01-28 22:08 ` Mathias Krause
2010-01-28 22:18 ` Linus Torvalds
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