Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip...

[firefly-linux-kernel-4.4.55.git] / fs / ecryptfs / messaging.c

diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index c6983978a31eda7218fa921b954848e2d4a5c42c..6913f727624d835870b860f5c3c0f6455eaa33d5 100644 (file)
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -360,7 +360,8 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
        struct ecryptfs_msg_ctx *msg_ctx;
        size_t msg_size;
        struct nsproxy *nsproxy;
-       struct user_namespace *current_user_ns;
+       struct user_namespace *tsk_user_ns;
+       uid_t ctx_euid;
        int rc;
 
        if (msg->index >= ecryptfs_message_buf_len) {
@@ -384,9 +385,9 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                mutex_unlock(&ecryptfs_daemon_hash_mux);
                goto wake_up;
        }
-       current_user_ns = nsproxy->user_ns;
-       rc = ecryptfs_find_daemon_by_euid(&daemon, msg_ctx->task->euid,
-                                         current_user_ns);
+       tsk_user_ns = __task_cred(msg_ctx->task)->user->user_ns;
+       ctx_euid = task_euid(msg_ctx->task);
+       rc = ecryptfs_find_daemon_by_euid(&daemon, ctx_euid, tsk_user_ns);
        rcu_read_unlock();
        mutex_unlock(&ecryptfs_daemon_hash_mux);
        if (rc) {
@@ -394,28 +395,28 @@ 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) {
+       if (tsk_user_ns != user_ns) {
                rc = -EBADMSG;
                printk(KERN_WARNING "%s: Received message from user_ns "
                       "[0x%p]; expected message from user_ns [0x%p]\n",
-                      __func__, user_ns, nsproxy->user_ns);
+                      __func__, user_ns, tsk_user_ns);
                goto unlock;
        }
        if (daemon->pid != pid) {
                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 +465,14 @@ 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,
-                                         current->nsproxy->user_ns);
+       rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_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);