Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 7/8] nfsd4: fix decoding of compounds across page boundaries | Date | Thu, 11 Jul 2013 15:20:36 -0700 |
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3.0-stable review patch. If anyone has any objections, please let me know.
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From: "J. Bruce Fields" <bfields@redhat.com>
commit 247500820ebd02ad87525db5d9b199e5b66f6636 upstream.
A freebsd NFSv4.0 client was getting rare IO errors expanding a tarball. A network trace showed the server returning BAD_XDR on the final getattr of a getattr+write+getattr compound. The final getattr started on a page boundary.
I believe the Linux client ignores errors on the post-write getattr, and that that's why we haven't seen this before.
Reported-by: Rick Macklem <rmacklem@uoguelph.ca> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/nfsd/nfs4xdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -159,8 +159,8 @@ static __be32 *read_buf(struct nfsd4_com */ memcpy(p, argp->p, avail); /* step to next page */ - argp->p = page_address(argp->pagelist[0]); argp->pagelist++; + argp->p = page_address(argp->pagelist[0]); if (argp->pagelen < PAGE_SIZE) { argp->end = argp->p + (argp->pagelen>>2); argp->pagelen = 0;
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