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Date: Wed, 24 Mar 2010 09:40:58 +0800
From: Eugene Teo <>
CC: "Steven M. Christey" <>
Subject: Re: CVE requests 6x kernel vulns still pending

>> 3) kernel: NFS DoS related to "automount" symlinks
> What exactly is the DoS that happens here?

NULL pointer dereference.

>> 5) kernel: NFS: Fix an Oops when truncating a file
> I assume that nfs_wait_on_request() can be influenced by a non-root user
> to generate the interrupt that triggers the Ooops?

If the non-root user kills the task while truncating the file, this 
could lead to the existence of unmapped pages that still have an 
attached nfs_page structure in page->private. nfs_wb_page_cancel() waits 
for I/O to complete, and when it completes, it will find itself with an 
unmapped page and oops.

> All of these will be filled in sometime Wednesday.
> - Steve


Eugene Teo / Red Hat Security Response Team

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