noux: prevent accessing invalid leaf path in open

Fixes #3542.
2019-10-24 16:50:50 +02:00 · 2019-10-24 16:50:50 +02:00 · 60f390ddf8
parent c79ebc93a2
commit 60f390ddf8
1 changed files with 3 additions and 0 deletions
--- a/repos/ports/src/noux/syscall.cc
+++ b/repos/ports/src/noux/syscall.cc
@ -230,6 +230,9 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
 				if (&vfs_handle->ds() == &_root_dir)
 					leaf_path = _sysio.open_in.path;

+				if (!leaf_path)
+					break;
+
 				Shared_pointer<Io_channel>
 					channel(new (_heap) Vfs_io_channel(_sysio.open_in.path,
 					                                   leaf_path,