LU-5808 llog: check name strictly to avoid invalid record

[fs/lustre-release.git] / lustre / mgs / mgs_llog.c

diff --git a/lustre/mgs/mgs_llog.c b/lustre/mgs/mgs_llog.c
index 60a0685..c47208b 100644 (file)
--- a/lustre/mgs/mgs_llog.c
+++ b/lustre/mgs/mgs_llog.c
@@ -1469,7 +1469,9 @@ int mgs_write_log_direct_all(const struct lu_env *env, struct mgs_device *mgs,
                if (server_only && strstr(dirent->mde_name, "-client") != NULL)
                        goto next;
 
-               if (strncmp(fsname, dirent->mde_name, len) != 0)
+               if (strlen(dirent->mde_name) <= len ||
+                   strncmp(fsname, dirent->mde_name, len) != 0 ||
+                   dirent->mde_name[len] != '-')
                        goto next;
 
                CDEBUG(D_MGS, "Changing log %s\n", dirent->mde_name);