Re: [PATCH] nfs: check a crash in nfs_lookup_revalidate

[Peng Huang]

I did not write any code to call lookup_one_len(). I just mounted an
ecryptfs on nfs, and then got the oops. So it should be a problem in
nfs or ecryptfs or both. At least it should not crash.

Peng

On Fri, May 13, 2011 at 6:32 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Wed, May 11, 2011 at 05:03:25PM -0400, Peng Huang wrote:
>> lookup_one_len() may call nfs_loopup_revalidate() with nd == NULL
>> indirectly, that causes the kernel crash.
>
> lookup_one_len must only be called by a filesystem or a library function
> called by the filesystem. ÂYou are not allowed to call it on a random
> filesystem like nfs that doesn't support the underlying assumptions.
>
>
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