diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2017-08-18 11:12:19 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-30 10:19:25 +0200 |
| commit | 87ac57ff972ae029baf54c6766ae1bc55e873854 (patch) | |
| tree | bf35940edf1db3326926a3c0e1cc0c8c27ef6392 /kernel | |
| parent | e6066962ca46d6aca02e061dc266816cd6d72e2d (diff) | |
nfsd: Limit end of page list when decoding NFSv4 WRITE
commit fc788f64f1f3eb31e87d4f53bcf1ab76590d5838 upstream.
When processing an NFSv4 WRITE operation, argp->end should never
point past the end of the data in the final page of the page list.
Otherwise, nfsd4_decode_compound can walk into uninitialized memory.
More critical, nfsd4_decode_write is failing to increment argp->pagelen
when it increments argp->pagelist. This can cause later xdr decoders
to assume more data is available than really is, which can cause server
crashes on malformed requests.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions