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From: Oleg Nesterov <oleg@redhat.com>
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>, Anton Arapov <anton@redhat.com>,
	"Frank Ch. Eigler" <fche@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	William Cohen <wcohen@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] uprobes: mmap_region() corrupts mm->mm_rb if uprobe_mmap() fails
Date: Tue, 31 Jul 2012 15:25:42 +0200	[thread overview]
Message-ID: <20120731132542.GA2854@redhat.com> (raw)
In-Reply-To: <20120731124805.GA485@redhat.com>

On 07/31, Oleg Nesterov wrote:
>
> OK, so what you suggest for now?
>
> Please note that it is very trivial to crash the kernel. Just
> do something like
>
> 	echo "p /bin/true:OFFSET_OF_SYSCALL_INSN" > /sys/kernel/debug/tracing/uprobe_events
> 	/bin/true

Forgot to mention...

And even it it didn't crash, mmap() (and thus exec) should not fail.

Oleg.


  reply	other threads:[~2012-07-31 13:28 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-28 16:31 [PATCH] uprobes: mmap_region() corrupts mm->mm_rb if uprobe_mmap() fails Oleg Nesterov
2012-07-28 16:34 ` Oleg Nesterov
2012-07-30 13:22 ` William Cohen
2012-07-31  6:47 ` Srikar Dronamraju
2012-07-31 12:48   ` Oleg Nesterov
2012-07-31 13:25     ` Oleg Nesterov [this message]
2012-08-02 10:05     ` [PATCH] uprobes: Ignore unsupported instructions in uprobe_mmap Srikar Dronamraju
2012-08-02 13:53       ` Oleg Nesterov
2012-08-02 16:42         ` Srikar Dronamraju
2012-08-02 17:48           ` Oleg Nesterov
2012-08-03 12:13         ` Srikar Dronamraju
2012-08-03 13:38           ` Oleg Nesterov
2012-08-02 14:17       ` Oleg Nesterov
2012-08-02 16:54         ` Srikar Dronamraju
2012-08-02 17:53           ` Oleg Nesterov
2012-08-03  1:20             ` Srikar Dronamraju
2012-08-03 13:47               ` Oleg Nesterov
2012-08-03 17:46 ` [PATCH] uprobes: mmap_region() corrupts mm->mm_rb if uprobe_mmap() fails Srikar Dronamraju

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