fix: fix unjailedroot of nested jails if there are other wrappers in betweenbackport/52775/stable31

Signed-off-by: Robin Appelman <robin@icewind.nl>

2 files changed, 8 insertions, 5 deletions

diff --git a/apps/files_sharing/lib/Cache.php b/apps/files_sharing/lib/Cache.php
index ccc93eb0952..024df5d3f43 100644
--- a/apps/files_sharing/lib/Cache.php
+++ b/apps/files_sharing/lib/Cache.php
@@ -68,7 +68,7 @@ class Cache extends CacheJail {
 		return $this->root;
 	}
 
-	protected function getGetUnjailedRoot(): string {
+	public function getGetUnjailedRoot(): string {
 		return $this->sourceRootInfo->getPath();
 	}
 
diff --git a/lib/private/Files/Cache/Wrapper/CacheJail.php b/lib/private/Files/Cache/Wrapper/CacheJail.php
index 24050dce0c9..5bc4ee8529d 100644
--- a/lib/private/Files/Cache/Wrapper/CacheJail.php
+++ b/lib/private/Files/Cache/Wrapper/CacheJail.php
@@ -31,10 +31,13 @@ class CacheJail extends CacheWrapper {
 	) {
 		parent::__construct($cache, $dependencies);
 
-		if ($cache instanceof CacheJail) {
-			$this->unjailedRoot = $cache->getSourcePath($root);
-		} else {
-			$this->unjailedRoot = $root;
+		$this->unjailedRoot = $root;
+		$parent = $cache;
+		while ($parent instanceof CacheWrapper) {
+			if ($parent instanceof CacheJail) {
+				$this->unjailedRoot = $parent->getSourcePath($this->unjailedRoot);
+			}
+			$parent = $parent->getCache();
 		}
 	}