220691 – (CVE-2008-1669) Kernel: SMP ordering hole in fcntl_setlk() (CVE-2008-1669)

Bug 220691 (CVE-2008-1669) - Kernel: SMP ordering hole in fcntl_setlk() (CVE-2008-1669)

Summary: Kernel: SMP ordering hole in fcntl_setlk() (CVE-2008-1669)

Status:	RESOLVED FIXED

Alias:	CVE-2008-1669

Product:	Gentoo Security
Classification:	Unclassified
Component:	Kernel (show other bugs)
Hardware:	All Linux

Importance:	High normal (vote)
Assignee:	Gentoo Security

URL:	http://git.kernel.org/?p=linux/kernel...
Whiteboard:	[linux > 2.4.19 <2.6.25.2]
Keywords:

Depends on:
Blocks:

Reported:	2008-05-06 23:16 UTC by Robert Buchholz (RETIRED)
Modified:	2013-09-05 03:02 UTC (History)
CC List:	2 users (show)

See Also:
Package list:
Runtime testing required:	---

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Description Robert Buchholz (RETIRED) gentoo-dev

2008-05-06 23:16:22 UTC

[PATCH] fix SMP ordering hole in fcntl_setlk()

fcntl_setlk()/close() race prevention has a subtle hole - we need to
make sure that if we *do* have an fcntl/close race on SMP box, the
access to descriptor table and inode->i_flock won't get reordered.
...

Comment 1 Robert Buchholz (RETIRED) gentoo-dev

2008-05-08 18:01:44 UTC

Name:      CVE-2008-1669

Linux kernel before 2.6.25.2 does not apply a certain protection mechanism for
fcntl functionality, which allows local users to (1) execute code in parallel
or (2) exploit a race condition to obtain "re-ordered access to the descriptor
table."