linux-kernel - Re: [PATCH] tracing: Fix crash due to uninitialized new

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Message-ID: <CAL26m8L-x0jW-aW5DtrNEuihp5CnsMw54OvE9BBx4g6Zp3c=dg@mail.gmail.com>
Date:	Fri, 22 Jun 2012 11:54:43 -0700
From:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Justin Teravest <teravest@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org,
	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
Subject: Re: [PATCH] tracing: Fix crash due to uninitialized new_pages list head

On Fri, Jun 22, 2012 at 11:50 AM, Vaibhav Nagarnaik
<vnagarnaik@...gle.com> wrote:
> The new_pages list head in the cpu_buffer is not initialized. When
> adding pages to the ring buffer, if the memory allocation fails in
> ring_buffer_resize, the clean up handler tries to free up the allocated
> pages from all the cpu buffers. The panic is caused by referencing the
> uninitialized new_pages list head.
>
> Initializing the new_pages list head in rb_allocate_cpu_buffer fixes
> this.
>
> Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@...gle.com>
> ---

Hi Steven,

I believe this fix should be pushed to 3.5 along with the other patch
I sent earlier:
tracing: Update entries counter when removing pages

These two patches fix issues with the recently added atomic resize patches.


Thanks

Vaibhav Nagarnaik
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