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path: root/net/sunrpc/auth_gss/auth_gss.c
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Diffstat (limited to 'net/sunrpc/auth_gss/auth_gss.c')
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c126
1 files changed, 90 insertions, 36 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index b6e440baccc3..afb292cd797d 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -183,8 +183,9 @@ gss_cred_get_ctx(struct rpc_cred *cred)
struct gss_cl_ctx *ctx = NULL;
rcu_read_lock();
- if (gss_cred->gc_ctx)
- ctx = gss_get_ctx(gss_cred->gc_ctx);
+ ctx = rcu_dereference(gss_cred->gc_ctx);
+ if (ctx)
+ gss_get_ctx(ctx);
rcu_read_unlock();
return ctx;
}
@@ -262,9 +263,22 @@ gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct
p = ERR_PTR(ret);
goto err;
}
- dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n",
- __func__, ctx->gc_expiry, now, timeout);
- return q;
+
+ /* is there any trailing data? */
+ if (q == end) {
+ p = q;
+ goto done;
+ }
+
+ /* pull in acceptor name (if there is one) */
+ p = simple_get_netobj(q, end, &ctx->gc_acceptor);
+ if (IS_ERR(p))
+ goto err;
+done:
+ dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u acceptor %.*s\n",
+ __func__, ctx->gc_expiry, now, timeout, ctx->gc_acceptor.len,
+ ctx->gc_acceptor.data);
+ return p;
err:
dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p));
return p;
@@ -1194,13 +1208,13 @@ gss_destroying_context(struct rpc_cred *cred)
{
struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
+ struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
struct rpc_task *task;
- if (gss_cred->gc_ctx == NULL ||
- test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
+ if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
return 0;
- gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
+ ctx->gc_proc = RPC_GSS_PROC_DESTROY;
cred->cr_ops = &gss_nullops;
/* Take a reference to ensure the cred will be destroyed either
@@ -1225,6 +1239,7 @@ gss_do_free_ctx(struct gss_cl_ctx *ctx)
gss_delete_sec_context(&ctx->gc_gss_ctx);
kfree(ctx->gc_wire_ctx.data);
+ kfree(ctx->gc_acceptor.data);
kfree(ctx);
}
@@ -1260,7 +1275,7 @@ gss_destroy_nullcred(struct rpc_cred *cred)
{
struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
- struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
+ struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
call_rcu(&cred->cr_rcu, gss_free_cred_callback);
@@ -1332,6 +1347,36 @@ gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred)
return err;
}
+static char *
+gss_stringify_acceptor(struct rpc_cred *cred)
+{
+ char *string = NULL;
+ struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
+ struct gss_cl_ctx *ctx;
+ struct xdr_netobj *acceptor;
+
+ rcu_read_lock();
+ ctx = rcu_dereference(gss_cred->gc_ctx);
+ if (!ctx)
+ goto out;
+
+ acceptor = &ctx->gc_acceptor;
+
+ /* no point if there's no string */
+ if (!acceptor->len)
+ goto out;
+
+ string = kmalloc(acceptor->len + 1, GFP_KERNEL);
+ if (!string)
+ goto out;
+
+ memcpy(string, acceptor->data, acceptor->len);
+ string[acceptor->len] = '\0';
+out:
+ rcu_read_unlock();
+ return string;
+}
+
/*
* Returns -EACCES if GSS context is NULL or will expire within the
* timeout (miliseconds)
@@ -1340,15 +1385,16 @@ static int
gss_key_timeout(struct rpc_cred *rc)
{
struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+ struct gss_cl_ctx *ctx;
unsigned long now = jiffies;
unsigned long expire;
- if (gss_cred->gc_ctx == NULL)
- return -EACCES;
-
- expire = gss_cred->gc_ctx->gc_expiry - (gss_key_expire_timeo * HZ);
-
- if (time_after(now, expire))
+ rcu_read_lock();
+ ctx = rcu_dereference(gss_cred->gc_ctx);
+ if (ctx)
+ expire = ctx->gc_expiry - (gss_key_expire_timeo * HZ);
+ rcu_read_unlock();
+ if (!ctx || time_after(now, expire))
return -EACCES;
return 0;
}
@@ -1357,13 +1403,19 @@ static int
gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
{
struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+ struct gss_cl_ctx *ctx;
int ret;
if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
goto out;
/* Don't match with creds that have expired. */
- if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
+ rcu_read_lock();
+ ctx = rcu_dereference(gss_cred->gc_ctx);
+ if (!ctx || time_after(jiffies, ctx->gc_expiry)) {
+ rcu_read_unlock();
return 0;
+ }
+ rcu_read_unlock();
if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
return 0;
out:
@@ -1909,29 +1961,31 @@ static const struct rpc_authops authgss_ops = {
};
static const struct rpc_credops gss_credops = {
- .cr_name = "AUTH_GSS",
- .crdestroy = gss_destroy_cred,
- .cr_init = gss_cred_init,
- .crbind = rpcauth_generic_bind_cred,
- .crmatch = gss_match,
- .crmarshal = gss_marshal,
- .crrefresh = gss_refresh,
- .crvalidate = gss_validate,
- .crwrap_req = gss_wrap_req,
- .crunwrap_resp = gss_unwrap_resp,
- .crkey_timeout = gss_key_timeout,
+ .cr_name = "AUTH_GSS",
+ .crdestroy = gss_destroy_cred,
+ .cr_init = gss_cred_init,
+ .crbind = rpcauth_generic_bind_cred,
+ .crmatch = gss_match,
+ .crmarshal = gss_marshal,
+ .crrefresh = gss_refresh,
+ .crvalidate = gss_validate,
+ .crwrap_req = gss_wrap_req,
+ .crunwrap_resp = gss_unwrap_resp,
+ .crkey_timeout = gss_key_timeout,
+ .crstringify_acceptor = gss_stringify_acceptor,
};
static const struct rpc_credops gss_nullops = {
- .cr_name = "AUTH_GSS",
- .crdestroy = gss_destroy_nullcred,
- .crbind = rpcauth_generic_bind_cred,
- .crmatch = gss_match,
- .crmarshal = gss_marshal,
- .crrefresh = gss_refresh_null,
- .crvalidate = gss_validate,
- .crwrap_req = gss_wrap_req,
- .crunwrap_resp = gss_unwrap_resp,
+ .cr_name = "AUTH_GSS",
+ .crdestroy = gss_destroy_nullcred,
+ .crbind = rpcauth_generic_bind_cred,
+ .crmatch = gss_match,
+ .crmarshal = gss_marshal,
+ .crrefresh = gss_refresh_null,
+ .crvalidate = gss_validate,
+ .crwrap_req = gss_wrap_req,
+ .crunwrap_resp = gss_unwrap_resp,
+ .crstringify_acceptor = gss_stringify_acceptor,
};
static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-23 16:58:14 +0000