diff options
Diffstat (limited to 'pkg/sentry/fs/mounts.go')
| -rw-r--r-- | pkg/sentry/fs/mounts.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/pkg/sentry/fs/mounts.go b/pkg/sentry/fs/mounts.go index 728575864..9b713e785 100644 --- a/pkg/sentry/fs/mounts.go +++ b/pkg/sentry/fs/mounts.go @@ -219,6 +219,13 @@ func (mns *MountNamespace) flushMountSourceRefsLocked() { } } + if mns.root == nil { + // No root? This MountSource must have already been destroyed. + // This can happen when a Save is triggered while a process is + // exiting. There is nothing to flush. + return + } + // Flush root's MountSource references. mns.root.Inode.MountSource.FlushDirentRefs() } @@ -249,6 +256,10 @@ func (mns *MountNamespace) destroy() { // Drop reference on the root. mns.root.DecRef() + // Ensure that root cannot be accessed via this MountNamespace any + // more. + mns.root = nil + // Wait for asynchronous work (queued by dropping Dirent references // above) to complete before destroying this MountNamespace. AsyncBarrier() |