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Diffstat (limited to 'fs/ecryptfs/messaging.c')
-rw-r--r--fs/ecryptfs/messaging.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index c22b32fc8e8..e8ba6278ad2 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -243,7 +243,8 @@ unlock:
* userspace. Returns zero upon delivery to desired context element;
* non-zero upon delivery failure or error.
*/
-int ecryptfs_process_response(struct ecryptfs_message *msg, pid_t pid, u32 seq)
+int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid,
+ pid_t pid, u32 seq)
{
struct ecryptfs_daemon_id *id;
struct ecryptfs_msg_ctx *msg_ctx;
@@ -268,6 +269,13 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, pid_t pid, u32 seq)
msg_ctx->task->euid, pid);
goto wake_up;
}
+ if (msg_ctx->task->euid != uid) {
+ rc = -EBADMSG;
+ ecryptfs_printk(KERN_WARNING, "Received message from user "
+ "[%d]; expected message from user [%d]\n",
+ uid, msg_ctx->task->euid);
+ goto unlock;
+ }
if (id->pid != pid) {
rc = -EBADMSG;
ecryptfs_printk(KERN_ERR, "User [%d] received a "