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path: root/net/sunrpc/auth_gss/gss_rpc_upcall.c
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Diffstat (limited to 'net/sunrpc/auth_gss/gss_rpc_upcall.c')
-rw-r--r--net/sunrpc/auth_gss/gss_rpc_upcall.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/gss_rpc_upcall.c b/net/sunrpc/auth_gss/gss_rpc_upcall.c
index af7ffd447fee..be95af3d1058 100644
--- a/net/sunrpc/auth_gss/gss_rpc_upcall.c
+++ b/net/sunrpc/auth_gss/gss_rpc_upcall.c
@@ -213,6 +213,30 @@ static int gssp_call(struct net *net, struct rpc_message *msg)
return status;
}
+static void gssp_free_receive_pages(struct gssx_arg_accept_sec_context *arg)
+{
+ int i;
+
+ for (i = 0; i < arg->npages && arg->pages[i]; i++)
+ __free_page(arg->pages[i]);
+}
+
+static int gssp_alloc_receive_pages(struct gssx_arg_accept_sec_context *arg)
+{
+ int i;
+
+ arg->npages = DIV_ROUND_UP(NGROUPS_MAX * 4, PAGE_SIZE);
+ arg->pages = kzalloc(arg->npages * sizeof(struct page *), GFP_KERNEL);
+
+ for (i=0; i < arg->npages; i++) {
+ arg->pages[i] = alloc_page(GFP_KERNEL);
+ if (arg->pages[i] == NULL) {
+ gssp_free_receive_pages(arg);
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
/*
* Public functions
@@ -261,10 +285,16 @@ int gssp_accept_sec_context_upcall(struct net *net,
arg.context_handle = &ctxh;
res.output_token->len = GSSX_max_output_token_sz;
+ ret = gssp_alloc_receive_pages(&arg);
+ if (ret)
+ return ret;
+
/* use nfs/ for targ_name ? */
ret = gssp_call(net, &msg);
+ gssp_free_receive_pages(&arg);
+
/* we need to fetch all data even in case of error so
* that we can free special strctures is they have been allocated */
data->major_status = res.status.major_status;