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

[Christoph Hellwig]

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.  You are not allowed to call it on a random
filesystem like nfs that doesn't support the underlying assumptions.

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