Treat ENOSPC as a state-file error during save.

PiperOrigin-RevId: 241028806
Change-Id: I770bf751a2740869a93c3ab50370a727ae580470

1 files changed, 5 insertions, 0 deletions

diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go
index 3533fd8f7..d9f3f4e24 100644
--- a/pkg/sentry/kernel/kernel.go
+++ b/pkg/sentry/kernel/kernel.go
@@ -365,6 +365,11 @@ func (ts *TaskSet) flushWritesToFiles(ctx context.Context) error {
 				syncErr := desc.file.Fsync(ctx, 0, fs.FileMaxOffset, fs.SyncAll)
 				if err := fs.SaveFileFsyncError(syncErr); err != nil {
 					name, _ := desc.file.Dirent.FullName(nil /* root */)
+					// Wrapping this error not only allows
+					// for a more useful message, but is
+					// required to distinguish Fsync errors
+					// from state file errors in
+					// state.Save.
 					return fmt.Errorf("%q was not sufficiently synced: %v", name, err)
 				}
 			}