From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Perches <joe@perches.com>
Subject: Re: [patch] isdn: fix a wrapping bug in isdn_ppp_ioctl()
Date: Wed, 10 Oct 2012 08:19:07 -0700
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Cc: Andreas Schwab <schwab@linux-m68k.org>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Karsten Keil <isdn@linux-pingi.de>,
	"David S. Miller" <davem@davemloft.net>,
	Masanari Iida <standby24x7@gmail.com>, netdev@vger.kernel.org,
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To: David Laight <David.Laight@ACULAB.COM>
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On Wed, 2012-10-10 at 15:59 +0100, David Laight wrote:
> Seems to me the code is expecting 256 bits of data, not any multiple of int,
> long or anything else.

include/linux/isdn_ppp.h:#define PPPIOCGCOMPRESSORS _IOR('t',134,unsigned long [8])