diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-08-14 17:14:17 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-08-16 16:15:51 -0400 |
| commit | cff298c721099c9ac4cea7196a37097ba2847946 (patch) | |
| tree | ff196c4709a0ea206a9bc61d322cbb12d98cb400 /fs | |
| parent | b291f1b1c86aa0c7bc3df2994e6a1a4e53f1fde0 (diff) | |
| download | linux-cff298c721099c9ac4cea7196a37097ba2847946.tar.bz2 | |
NFSv4: Don't use private xdr_stream fields in decode_getacl
Instead of using the private field xdr->p from struct xdr_stream,
use the public xdr_stream_pos().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 54d3f5a9faa6..1bfbd67c556d 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -5045,10 +5045,10 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_getaclres *res) { unsigned int savep; - __be32 *bm_p; uint32_t attrlen, bitmap[3] = {0}; int status; + unsigned int pg_offset; res->acl_len = 0; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) @@ -5056,7 +5056,8 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, xdr_enter_page(xdr, xdr->buf->page_len); - bm_p = xdr->p; + /* Calculate the offset of the page data */ + pg_offset = xdr->buf->head[0].iov_len; if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto out; @@ -5070,18 +5071,18 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, /* The bitmap (xdr len + bitmaps) and the attr xdr len words * are stored with the acl data to handle the problem of * variable length bitmaps.*/ - res->acl_data_offset = (xdr->p - bm_p) << 2; + res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset; /* We ignore &savep and don't do consistency checks on * the attr length. Let userspace figure it out.... */ res->acl_len = attrlen; - if (attrlen + res->acl_data_offset > xdr->buf->page_len) { + if (attrlen > (xdr->nwords << 2)) { if (res->acl_flags & NFS4_ACL_LEN_REQUEST) { /* getxattr interface called with a NULL buf */ goto out; } dprintk("NFS: acl reply: attrlen %u > page_len %u\n", - attrlen, xdr->buf->page_len); + attrlen, xdr->nwords << 2); return -EINVAL; } } else |