oss-security - CVE request: kernel: parisc: isa-eeprom missing lower bound check

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Message-ID: <4A7FA4B4.3060706@kernel.sg>
Date: Mon, 10 Aug 2009 12:40:20 +0800
From: Eugene Teo <eugeneteo@...nel.sg>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>
Subject: CVE request: kernel: parisc: isa-eeprom missing lower bound check

loff_t is a signed type. If userspace passes a negative ppos, the
"count" range check is weakened. If ppos is negative, the readb() later
in the function will poke in random memory. Only affects if you are
using a PA-RISC kernel with CONFIG_EISA set.

Upstream commit:
http://git.kernel.org/linus/6b4dbcd86a9d464057fcc7abe4d0574093071fcc

Reference:
http://patchwork.kernel.org/patch/36418/

Thanks, Eugene

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