linux-kernel - Re: [PATCH] uprobes: mmap_region() corrupts mm->mm_rb if uprobe

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Message-ID: <20120728163451.GA22727@redhat.com>
Date:	Sat, 28 Jul 2012 18:34:51 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Anton Arapov <anton@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	William Cohen <wcohen@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uprobes: mmap_region() corrupts mm->mm_rb if
	uprobe_mmap() fails

On 07/28, Oleg Nesterov wrote:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=843640
>
> If mmap_region()->uprobe_mmap() fails, unmap_and_free_vma path
> does unmap_region() but does not remove the soon-to-be-freed vma
> from rb tree (actually there are more problems).

Just in case...

Ingo, this is orthogonal to other pending changes I sent. I think
3.6 (and 3.5-stable) needs this fix.

Oleg.

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