oss-security - Re: CVE request: kernel: dio: zero struct dio with kzalloc instead of manually

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Date: Thu, 4 Sep 2008 12:49:51 -0400 (EDT)
From: "Steven M. Christey" <coley@...us.mitre.org>
To: oss-security@...ts.openwall.com
cc: coley@...re.org
Subject: Re: CVE request: kernel: dio: zero struct dio with
 kzalloc instead of manually

======================================================
Name: CVE-2007-6716
Status: Candidate
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6716
Reference: MLIST:[linux-kernel] 20070731 Re: [PATCH] add check do_direct_IO() return val
Reference: URL:http://lkml.org/lkml/2007/7/30/448
Reference: MLIST:[oss-security] 20080904 CVE request: kernel: dio: zero struct dio with kzalloc instead of manually
Reference: URL:http://www.openwall.com/lists/oss-security/2008/09/04/1
Reference: CONFIRM:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=848c4dd5153c7a0de55470ce99a8e13a63b4703f
Reference: CONFIRM:https://bugzilla.redhat.com/show_bug.cgi?id=461082
Reference: CONFIRM:http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23

fs/direct-io.c in the dio subsystem in the Linux kernel before 2.6.23
does not properly zero out the dio struct, which allows local users to
cause a denial of service (OOPS), as demonstrated by a certain fio
test.

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