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overlayBoundEndpoint must be recursive if there is an overlay in the lower.

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The old overlayBoundEndpoint assumed that the lower is not an overlay.  It
should check if the lower is an overlay and handle that case.

PiperOrigin-RevId: 225882303
Change-Id: I60660c587d91db2826e0719da0983ec8ad024cb8
This commit is contained in:
Nicolas Lacasse
2018-12-17 13:46:57 -08:00
committed by Shentubot
parent f7e8dc57c5
commit d3ae74d2a5
1 changed files with 6 additions and 2 deletions
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pkg/sentry/fs/inode_overlay.go
+6 -2
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@@ -390,8 +390,12 @@ func overlayBoundEndpoint(o *overlayEntry, path string) transport.BoundEndpoint
if o.upper != nil {
return o.upper.InodeOperations.BoundEndpoint(o.upper, path)
}
// If a socket is already in the lower file system, allow connections
// to it.
// If the lower is itself an overlay, recurse.
if o.lower.overlay != nil {
return overlayBoundEndpoint(o.lower.overlay, path)
}
// Lower is not an overlay. Call BoundEndpoint directly.
return o.lower.InodeOperations.BoundEndpoint(o.lower, path)
}