podman mount: ignore ErrLayerUnknown

When we check for a storage container mount we normally expect a
ErrContainerUnknown when it does not exists. However during we check if
it is actually mounted we also can get ErrLayerUnknown when the
contianer was removed between the Container and Mount checks as they do
not happen under the same lock.

Fixes #23671

Signed-off-by: Paul Holzinger <[email protected]>

pkg/domain/infra/abi/containers.go

@@ -1418,7 +1418,7 @@ func (ic *ContainerEngine) ContainerMount(ctx context.Context, nameOrIDs []strin
 			// This can only happen in a narrow race because we first create the storage
 			// container and then the libpod container so the StorageContainers() call
 			// above would need to happen in that interval.
-			if errors.Is(err, types.ErrContainerUnknown) || errors.Is(err, define.ErrCtrExists) {
+			if errors.Is(err, types.ErrContainerUnknown) || errors.Is(err, types.ErrLayerUnknown) || errors.Is(err, define.ErrCtrExists) {
 				continue
 			}
 			return nil, err