netdev - Re: [patch v3] fix stack overflow in pktgen_if

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Message-ID: <20101028162825.GG6062@bicker>
Date:	Thu, 28 Oct 2010 18:28:25 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Nelson Elhage <nelhage@...lice.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Robert Olsson <robert.olsson@....uu.se>,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	netdev@...r.kernel.org
Subject: Re: [patch v3] fix stack overflow in pktgen_if_write()

On Thu, Oct 28, 2010 at 11:22:22AM -0400, Nelson Elhage wrote:
> You've got a leak if copy_user fails.
> 

My QC scripts should have caught that, but they didn't...  I'll figure
it out.  It shouldn't happen again.

> While testing this, I realized that printk() won't print more than 1k in a
> single call, anyways, so I've sent along a patch that just copies up to 1k onto
> the stack, which should prevent the overflow without changing behavior or
> needing a heap allocation.
> 

Ok.  Good to hear.  Sorry I wasted people's time.

regards,
dan carpenter


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