Re: [PATCH v3.18-rc2] staging: android: logger: Fix log corruption regression

[Al Viro]

On Mon, Oct 27, 2014 at 06:51:43PM +0000, Daniel Thompson wrote:
> Since commit cd678fce4280 ("switch logger to ->write_iter()"), any
> attempt to write to the log results in the log data being written over
> its own metadata, thus rendering the log unreadable.
> 
> The problem was first detected when I ran an Android userspace on the
> v3.18-rc1 kernel. However the issue can also be observed with a
> non-Android userspace by using echo/cat to write to/from /dev/log_main .
> 
> This patch resolves the problem by using a temporary to track the status
> of not-yet-committed writes to the log buffer.
> 
> Signed-off-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

Applied
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