linux-kernel - Re: [PATCH] zram: don't copy invalid compression algorithms

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Message-ID: <20150908134401.GA590@swordfish>
Date:	Tue, 8 Sep 2015 22:44:01 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Luis Henriques <luis.henriques@...onical.com>,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH] zram: don't copy invalid compression algorithms

dammit, not going to waste my time on this BS anymore.



> > --- a/drivers/block/zram/zram_drv.c
> > +++ b/drivers/block/zram/zram_drv.c
> > @@ -365,6 +365,9 @@ static ssize_t comp_algorithm_store(struct device *dev,
> >  	struct zram *zram = dev_to_zram(dev);
> >  	size_t sz;
> >  
> > +	if (!zcomp_available_algorithm(buf))
> > +		return -EINVAL;
> 
> If you ignore tailling space, your change would make a bug.
> If you fix it, it looks good to me.

that's why find_backend() calls sysfs_streq(), which takes care of
a trailing new line. unless you're speaking about something else.

	-ss
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