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-rw-r--r--pkg/sentry/fsimpl/gofer/gofer.go5
1 files changed, 3 insertions, 2 deletions
diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go
index 81d34cfe3..57bff1789 100644
--- a/pkg/sentry/fsimpl/gofer/gofer.go
+++ b/pkg/sentry/fsimpl/gofer/gofer.go
@@ -1472,8 +1472,9 @@ func (d *dentry) ensureSharedHandle(ctx context.Context, read, write, trunc bool
return err
}
- if d.hostFD < 0 && openReadable && h.fd >= 0 {
- // We have no existing FD; use the new FD for at least reading.
+ if d.hostFD < 0 && h.fd >= 0 && openReadable && (d.writeFile.isNil() || openWritable) {
+ // We have no existing FD, and the new FD meets the requirements
+ // for d.hostFD, so start using it.
d.hostFD = h.fd
} else if d.hostFD >= 0 && d.writeFile.isNil() && openWritable {
// We have an existing read-only FD, but the file has just been