SUNRPC: Use correct type in buffer length calculations

Use correct type signage in gss_krb5_remove_padding() when doing length
calculations.  Both xdr_buf.len and iov.iov_len are size_t, which is
unsigned; so use an unsigned type for our temporary length variable to
ensure we don't overflow it..

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index 42b3220bed39..8bd074df27d3 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -42,7 +42,7 @@ gss_krb5_remove_padding(struct xdr_buf *buf, int blocksize)
 {
         u8 *ptr;
         u8 pad;
-        int len = buf->len;
+        size_t len = buf->len;
 
         if (len <= buf->head[0].iov_len) {
                 pad = *(u8 *)(buf->head[0].iov_base + len - 1);
@@ -53,9 +53,9 @@ gss_krb5_remove_padding(struct xdr_buf *buf, int blocksize)
         } else
                 len -= buf->head[0].iov_len;
         if (len <= buf->page_len) {
-                int last = (buf->page_base + len - 1)
+                unsigned int last = (buf->page_base + len - 1)
                                         >>PAGE_CACHE_SHIFT;
-                int offset = (buf->page_base + len - 1)
+                unsigned int offset = (buf->page_base + len - 1)
                                         & (PAGE_CACHE_SIZE - 1);
                 ptr = kmap_atomic(buf->pages[last], KM_USER0);
                 pad = *(ptr + offset);