From b1082696ebb3970ca0a67790fa9bb9955eff5fc2 Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Thu, 24 Jun 2021 13:53:36 +0200 Subject: [PATCH] cp: do not allow dir->file copying Fix a bug in `podman-cp` to forbid copying directories to files. Previously, the directory was copied to the parent directory of the file which is wrong. Signed-off-by: Valentin Rothberg --- cmd/podman/containers/cp.go | 8 ++++++++ test/system/065-cp.bats | 9 +++++++++ 2 files changed, 17 insertions(+) diff --git a/cmd/podman/containers/cp.go b/cmd/podman/containers/cp.go index 2c7d72b205..0ad2588242 100644 --- a/cmd/podman/containers/cp.go +++ b/cmd/podman/containers/cp.go @@ -177,6 +177,10 @@ func copyFromContainer(container string, containerPath string, hostPath string) containerTarget = filepath.Dir(containerTarget) } + if !isStdout && containerInfo.IsDir && !hostInfo.IsDir { + return errors.New("destination must be a directory when copying a directory") + } + reader, writer := io.Pipe() hostCopy := func() error { defer reader.Close() @@ -334,6 +338,10 @@ func copyToContainer(container string, containerPath string, hostPath string) er stdinFile = tmpFile.Name() } + if hostInfo.IsDir && !containerInfo.IsDir { + return errors.New("destination must be a directory when copying a directory") + } + reader, writer := io.Pipe() hostCopy := func() error { defer writer.Close() diff --git a/test/system/065-cp.bats b/test/system/065-cp.bats index 24ac8118ec..eda04611f5 100644 --- a/test/system/065-cp.bats +++ b/test/system/065-cp.bats @@ -272,6 +272,11 @@ load helpers run_podman rm -f cpcontainer done < <(parse_table "$tests") + run_podman create --name cpcontainer --workdir=/srv $cpimage sleep infinity + run_podman 125 cp $srcdir cpcontainer:/etc/os-release + is "$output" "Error: destination must be a directory when copying a directory" "cannot copy directory to file" + run_podman rm -f cpcontainer + run_podman rmi -f $cpimage } @@ -343,6 +348,10 @@ load helpers is "$(< $destdir$dest_fullname/containerfile1)" "${randomcontent[1]}" "$description" rm -rf $destdir/* done < <(parse_table "$tests") + + touch $destdir/testfile + run_podman 125 cp cpcontainer:/etc/ $destdir/testfile + is "$output" "Error: destination must be a directory when copying a directory" "cannot copy directory to file" run_podman rm -f cpcontainer run_podman rmi -f $cpimage