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| author | J. Bruce Fields <bfields@redhat.com> | 2013-06-21 11:48:11 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-07-01 17:29:40 -0400 |
| commit | 247500820ebd02ad87525db5d9b199e5b66f6636 (patch) | |
| tree | 839a6e89d7590ec064ce230b4c211e107020a99f /fs | |
| parent | 99c415156c49571d0f045a8cb56e0bc24225b9d9 (diff) | |
| download | blackbird-op-linux-247500820ebd02ad87525db5d9b199e5b66f6636.tar.gz blackbird-op-linux-247500820ebd02ad87525db5d9b199e5b66f6636.zip | |
nfsd4: fix decoding of compounds across page boundaries
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.
Cc: stable@vger.kernel.org
Reported-by: Rick Macklem <rmacklem@uoguelph.ca>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 171fe5e4af67..e34f5ebfc811 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -167,8 +167,8 @@ static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) */ 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; |
