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| author | J. Bruce Fields <bfields@redhat.com> | 2013-05-07 17:45:20 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-05-07 17:45:20 -0400 |
| commit | fb43f11c666a4f99f23f0be4fa528dcd288c0da2 (patch) | |
| tree | 0cbd44e178322a537c83faa576686e2463c4ccc7 | |
| parent | 9fd40c5a66be0b0a5d65362ec139968ba6d1f412 (diff) | |
| download | linux-fb43f11c666a4f99f23f0be4fa528dcd288c0da2.tar.gz linux-fb43f11c666a4f99f23f0be4fa528dcd288c0da2.tar.bz2 linux-fb43f11c666a4f99f23f0be4fa528dcd288c0da2.zip | |
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.c | 26 |
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; } |