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authorTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 21:16:19 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-23 00:07:02 +0400
commit334ccfd545bba9690515f2c5c167d5adb161989b (patch)
tree8a06af4d40c711c578adc36d9afd3200a88a2689 /net/sunrpc/xdr.c
parentd05fdb0cec75415b2d9eb95748386e67414e49c3 (diff)
downloadlinux-334ccfd545bba9690515f2c5c167d5adb161989b.tar.xz
[PATCH] RPC: Ensure XDR iovec length is initialized correctly in call_header
Fix up call_header() so that it calls xdr_adjust_iovec(). Fix calculation of the scratch buffer length in xdr_init_encode(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xdr.c')
-rw-r--r--net/sunrpc/xdr.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 67b9f035ba86..f86d1baa6302 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -616,12 +616,24 @@ xdr_shift_buf(struct xdr_buf *buf, size_t len)
void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p)
{
struct kvec *iov = buf->head;
+ int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;
+ BUG_ON(scratch_len < 0);
xdr->buf = buf;
xdr->iov = iov;
- xdr->end = (uint32_t *)((char *)iov->iov_base + iov->iov_len);
- buf->len = iov->iov_len = (char *)p - (char *)iov->iov_base;
- xdr->p = p;
+ xdr->p = (uint32_t *)((char *)iov->iov_base + iov->iov_len);
+ xdr->end = (uint32_t *)((char *)iov->iov_base + scratch_len);
+ BUG_ON(iov->iov_len > scratch_len);
+
+ if (p != xdr->p && p != NULL) {
+ size_t len;
+
+ BUG_ON(p < xdr->p || p > xdr->end);
+ len = (char *)p - (char *)xdr->p;
+ xdr->p = p;
+ buf->len += len;
+ iov->iov_len += len;
+ }
}
EXPORT_SYMBOL(xdr_init_encode);