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    SubjectRe: [PATCH] nfs: check a crash in nfs_lookup_revalidate
    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.


    On Fri, May 13, 2011 at 6:32 AM, Christoph Hellwig <> 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.  You are not allowed to call it on a random
    > filesystem like nfs that doesn't support the underlying assumptions.
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