oss-security - CVE request - kernel: char: Int overflow in lp_do

Message-ID: <CABVvea15aMSR5ZB9e-BppnSzGanbCeCgBq2JRx3Mj=K+jtLgUw@mail.gmail.com>
Date: Tue, 31 Dec 2013 14:33:57 +0800
From: Yongjian Xu <xuyongjiande@...il.com>
To: oss-security@...ts.openwall.com
Subject: CVE request - kernel: char: Int overflow in lp_do_ioctl()

Hi,

https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=1c2de820d66d704c7d6fffdd872b7670eb4e29bb

This is an integer overflow, and can be controlled via ioctl.

arg comes from user-space, so int overflow may occur in this:
LP_TIME(minor) = arg * HZ/100;

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