NFSD: Prevent a possible oops in the nfs_dirent() tracepoint
The double copy of the string is a mistake, plus __assign_str() uses strlen(), which is wrong to do on a string that isn't guaranteed to be NUL-terminated. Fixes: 6019ce07 ("NFSD: Add a tracepoint to record directory entry encoding") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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