Re: [PATCH 0/2] [GIT PULL][v3.5] ring-buffer: Fixes for the changesin the last merge window

[Ingo Molnar]

* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> Ingo,
> 
> This patch series has a couple of fixes for bugs that snuck 
> into the last merge window. The first is a crash that can 
> happen because of an uninitialized list, and failing to 
> allocate the requested amount. This can happen by changing the 
> buffer_size_kb to a huge amount as the first change that is 
> done to it after booting up (note, the bug does not happen if 
> a successful change happens first).
> 
> The second patch can cause the ring buffer accounting (which 
> is used by the infrastructure of the ring buffer) to get out 
> of sync. This happens if you fill the buffer and then remove a 
> few pages from it while it is full.
> 
> The fixes are pretty simple, and should go into the 3.5-rc.
> 
> Please pull the latest tip/perf/urgent tree, which can be found at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
> tip/perf/urgent
> 
> Head SHA1: 48fdc72f23ad9a9956e524a47843135d0bbc3317
> 
> 
> Vaibhav Nagarnaik (2):
>       ring-buffer: Fix crash due to uninitialized new_pages list head
>       ring-buffer: Fix accounting of entries when removing pages
> 
> ----
>  kernel/trace/ring_buffer.c |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Pulled, thanks!

	Ingo

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