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| author | Frank Sorenson <sorenson@redhat.com> | 2018-10-30 23:10:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 11:19:23 +0300 |
| commit | 03c91663c0935fd1c7df5539ff6df65db8f57278 (patch) | |
| tree | 3ee6c8e30e9fe6d07f1bfd525015e6a958d2d287 /fs/nfs/nfs4state.c | |
| parent | 401182ae096bfb16693bcfb8fcab1bc128a5c6bc (diff) | |
| download | linux-03c91663c0935fd1c7df5539ff6df65db8f57278.tar.xz | |
sunrpc: correct the computation for page_ptr when truncating
commit 5d7a5bcb67c70cbc904057ef52d3fcfeb24420bb upstream.
When truncating the encode buffer, the page_ptr is getting
advanced, causing the next page to be skipped while encoding.
The page is still included in the response, so the response
contains a page of bogus data.
We need to adjust the page_ptr backwards to ensure we encode
the next page into the correct place.
We saw this triggered when concurrent directory modifications caused
nfsd4_encode_direct_fattr() to return nfserr_noent, and the resulting
call to xdr_truncate_encode() corrupted the READDIR reply.
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfs/nfs4state.c')
0 files changed, 0 insertions, 0 deletions