linux-kernel - user pointer bugs

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Message-ID: <5166c2f30701141558td770dfbt13fd5098f76bcde6@mail.gmail.com>
Date:	Sun, 14 Jan 2007 15:58:11 -0800
From:	"Suhabe Bugrara" <suhabe@...nford.edu>
To:	linux-kernel@...r.kernel.org
Subject: user pointer bugs

Hello,

In linux-2.6.19.2, do the following lines have bugs in them? It looks
like they dereference a user pointer without first being checked by
the "access_ok" macro to ensure that they point into userspace.

Suhabe

========================
File: sound/isa/sscape.c
Lines: 550, 665
Description: The pointer "bb" is dereferenced in the expression
"bb->code" without being checked first.
Fix: Replace "bb->code" with "&bb->code"

========================
File: block/scsi_ioctl.c
Lines: 406, 427, 430, 482, 486
Description: The pointer "sic" is dereferenced in the expression
"sic->data" without being checked first.
Fix: Replace "sic->code" with "&sic->code"

========================
File: sound/pci/rme9652/hdsp.c
Line: 4589
Description: The pointer "mixer" is dereferenced in the expression
"mixer->data" without being checked first.
Fix: Replace "mixer->matrix" with "&mixer->matrix"
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