CRED: Wrap task credential accesses in the eCryptFS filesystem

[karo-tx-linux.git] / fs / ecryptfs / messaging.c

diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index c6983978a31eda7218fa921b954848e2d4a5c42c..e0b0a4e28b9b71f2001b3607f0096fa6ef15e389 100644 (file)
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -361,6 +361,7 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
        size_t msg_size;
        struct nsproxy *nsproxy;
        struct user_namespace *current_user_ns;
+       uid_t ctx_euid;
        int rc;
 
        if (msg->index >= ecryptfs_message_buf_len) {
@@ -385,8 +386,8 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                goto wake_up;
        }
        current_user_ns = nsproxy->user_ns;
-       rc = ecryptfs_find_daemon_by_euid(&daemon, msg_ctx->task->euid,
-                                         current_user_ns);
+       ctx_euid = task_euid(msg_ctx->task);
+       rc = ecryptfs_find_daemon_by_euid(&daemon, ctx_euid, current_user_ns);
        rcu_read_unlock();
        mutex_unlock(&ecryptfs_daemon_hash_mux);
        if (rc) {
@@ -394,14 +395,14 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                printk(KERN_WARNING "%s: User [%d] received a "
                       "message response from process [0x%p] but does "
                       "not have a registered daemon\n", __func__,
-                      msg_ctx->task->euid, pid);
+                      ctx_euid, pid);
                goto wake_up;
        }
-       if (msg_ctx->task->euid != euid) {
+       if (ctx_euid != euid) {
                rc = -EBADMSG;
                printk(KERN_WARNING "%s: Received message from user "
                       "[%d]; expected message from user [%d]\n", __func__,
-                      euid, msg_ctx->task->euid);
+                      euid, ctx_euid);
                goto unlock;
        }
        if (current_user_ns != user_ns) {
@@ -415,7 +416,7 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                rc = -EBADMSG;
                printk(KERN_ERR "%s: User [%d] sent a message response "
                       "from an unrecognized process [0x%p]\n",
-                      __func__, msg_ctx->task->euid, pid);
+                      __func__, ctx_euid, pid);
                goto unlock;
        }
        if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_PENDING) {
@@ -464,14 +465,15 @@ ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type,
                             struct ecryptfs_msg_ctx **msg_ctx)
 {
        struct ecryptfs_daemon *daemon;
+       uid_t euid = current_euid();
        int rc;
 
-       rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+       rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
                                          current->nsproxy->user_ns);
        if (rc || !daemon) {
                rc = -ENOTCONN;
                printk(KERN_ERR "%s: User [%d] does not have a daemon "
-                      "registered\n", __func__, current->euid);
+                      "registered\n", __func__, euid);
                goto out;
        }
        mutex_lock(&ecryptfs_msg_ctx_lists_mux);