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authorJ. Bruce Fields <bfields@redhat.com>2013-05-07 17:45:20 -0400
committerJ. Bruce Fields <bfields@redhat.com>2013-05-07 17:45:20 -0400
commitfb43f11c666a4f99f23f0be4fa528dcd288c0da2 (patch)
tree0cbd44e178322a537c83faa576686e2463c4ccc7
parent9fd40c5a66be0b0a5d65362ec139968ba6d1f412 (diff)
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SUNRPC: fix decoding of optional gss-proxy xdr fields
The current code works, but sort of by accident: it obviously didn't intend the error return to be interpreted as "true". Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
-rw-r--r--net/sunrpc/auth_gss/gss_rpc_xdr.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c
index a1e1b1ab515b..357f613df7ff 100644
--- a/net/sunrpc/auth_gss/gss_rpc_xdr.c
+++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c
@@ -21,16 +21,6 @@
#include <linux/sunrpc/svcauth.h>
#include "gss_rpc_xdr.h"
-static bool gssx_check_pointer(struct xdr_stream *xdr)
-{
- __be32 *p;
-
- p = xdr_reserve_space(xdr, 4);
- if (unlikely(p == NULL))
- return -ENOSPC;
- return *p?true:false;
-}
-
static int gssx_enc_bool(struct xdr_stream *xdr, int v)
{
__be32 *p;
@@ -802,6 +792,7 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct gssx_res_accept_sec_context *res)
{
+ u32 value_follows;
int err;
/* res->status */
@@ -810,7 +801,10 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
return err;
/* res->context_handle */
- if (gssx_check_pointer(xdr)) {
+ err = gssx_dec_bool(xdr, &value_follows);
+ if (err)
+ return err;
+ if (value_follows) {
err = gssx_dec_ctx(xdr, res->context_handle);
if (err)
return err;
@@ -819,7 +813,10 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
}
/* res->output_token */
- if (gssx_check_pointer(xdr)) {
+ err = gssx_dec_bool(xdr, &value_follows);
+ if (err)
+ return err;
+ if (value_follows) {
err = gssx_dec_buffer(xdr, res->output_token);
if (err)
return err;
@@ -828,7 +825,10 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
}
/* res->delegated_cred_handle */
- if (gssx_check_pointer(xdr)) {
+ err = gssx_dec_bool(xdr, &value_follows);
+ if (err)
+ return err;
+ if (value_follows) {
/* we do not support upcall servers sending this data. */
return -EINVAL;
}