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Date: Thu, 23 Jun 2011 15:51:18 -0400 (EDT)
From: Josh Bressers <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request: kernel: NLM: Don't hang forever on
 NLM unlock requests

----- Original Message -----
> NLM: Don't hang forever on NLM unlock requests
> If the NLM daemon is killed on the NFS server, we can currently end up
> hanging forever on an 'unlock' request, instead of aborting.  Basically,
> if the rpcbind request fails, or the server keeps returning garbage, we
> really want to quit instead of retrying.
> Tested-by: Vasily Averin <>
> Signed-off-by: Trond Myklebust <>
> Cc:
> In English, it means that a local, unprivileged user could use the flock
> system call on a NFS share to cause a denial of service.

Please use CVE-2011-2491.



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