linux-kernel - Re: Regression associated with commit c8628155ece3

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Message-ID: <503BB49C.5010402@lwfinger.net>
Date:	Mon, 27 Aug 2012 12:55:40 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	David Miller <davem@...emloft.net>, ncardwell@...gle.com,
	linville@...driver.com, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Regression associated with commit c8628155ece3 - "tcp: reduce
 out_of_order memory use"

On 08/24/2012 12:47 PM, Eric Dumazet wrote:
>
> dev_alloc_skb() can return NULL
>
> -> crash
>
> skb_clone() can also return NULL
>
> -> crash

I have prepared a patch to fix all the unchecked allocations.

Over the weekend I made some progress. To test the latest vendor driver, I 
installed a 32-bit system. Their driver is not compatible with a 64-bit system. 
I found that not only did the vendor driver work with secure sites, but so did 
the in-kernel version. I now have tcpdump output for the 32-bit case that works, 
and the 64-bit case that fails. It seems likely that I missed some 32/64 bit 
incompatibility when I did the conversion.

Thanks for all your help in trying to resolve this issue.

Larry

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