From: Dan Rosenberg <drosenberg@vsecurity.com>
Date: Fri, 29 Apr 2011 14:48:07 +0000 (+0100)
Subject: ARM: 6891/1: prevent heap corruption in OABI semtimedop
X-Git-Tag: v2.6.39-rc6~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f22072ab50cac7983f9660d33974b45184da4f9;p=pandora-kernel.git

ARM: 6891/1: prevent heap corruption in OABI semtimedop

When CONFIG_OABI_COMPAT is set, the wrapper for semtimedop does not
bound the nsops argument.  A sufficiently large value will cause an
integer overflow in allocation size, followed by copying too much data
into the allocated buffer.  Fix this by restricting nsops to SEMOPM.
Untested.

Cc: stable@kernel.org
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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