From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 26 Jan 2016 09:24:25 +0000 (+0300)
Subject: intel_scu_ipcutil: underflow in scu_reg_access()
X-Git-Tag: v3.2.78~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6d0c0291601e0af9b0f08dc58be5731f45e8e38;p=pandora-kernel.git

intel_scu_ipcutil: underflow in scu_reg_access()

commit b1d353ad3d5835b16724653b33c05124e1b5acf1 upstream.

"count" is controlled by the user and it can be negative.  Let's prevent
that by making it unsigned.  You have to have CAP_SYS_RAWIO to call this
function so the bug is not as serious as it could be.

Fixes: 5369c02d951a ('intel_scu_ipc: Utility driver for intel scu ipc')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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