LU-8037 fileset: reject dotdot as a path component

[fs/lustre-release.git] / lustre / mdt / mdt_handler.c

diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index 95ac27e..47c8a17 100644 (file)
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -312,6 +312,14 @@ static int mdt_lookup_fileset(struct mdt_thread_info *info, const char *fileset,
                        rc = -EINVAL;
                        break;
                }
+
+               /* reject .. as a path component */
+               if (lname->ln_namelen == 2 &&
+                   strncmp(s1, "..", 2) == 0) {
+                       rc = -EINVAL;
+                       break;
+               }
+
                strncpy(name, s1, lname->ln_namelen);
                name[lname->ln_namelen] = '\0';