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[stable28] fix: don't return null for SharedStorage::getWrapperStorage with share recursion #44323

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merged 2 commits into from
Jul 11, 2024
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[stable28] fix: don't return null for SharedStorage::getWrapperStorage with share recursion #44323

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2259623
fix: don't return null for SharedStorage::getWrapperStorage with shar…
icewind1991 Mar 11, 2024
e0f3de8
chore: improve typing for SharedStorage::$storage
icewind1991 Mar 11, 2024
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19 changes: 19 additions & 0 deletions apps/files_sharing/lib/SharedStorage.php
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,12 @@ class SharedStorage extends \OC\Files\Storage\Wrapper\Jail implements ISharedSto

private string $sourcePath = '';

/**
* @psalm-suppress NonInvariantDocblockPropertyType
* @var ?\OC\Files\Storage\Storage $storage
*/
protected $storage;

private static int $initDepth = 0;

public function __construct($arguments) {
Expand Down Expand Up @@ -134,8 +140,21 @@ private function getSourceRootInfo() {
return $this->sourceRootInfo;
}

/**
* @psalm-assert \OC\Files\Storage\Storage $this->storage
*/
private function init() {
if ($this->initialized) {
if (!$this->storage) {
// marked as initialized but no storage set
// this is probably because some code path has caused recursion during the share setup
// we setup a "failed storage" so `getWrapperStorage` doesn't return null.
// If the share setup completes after this the "failed storage" will be overwritten by the correct one
$this->logger->warning('Possible share setup recursion detected');
$this->storage = new FailedStorage(['exception' => new \Exception('Possible share setup recursion detected')]);
$this->cache = new FailedCache();
$this->rootPath = '';
}
Comment on lines +148 to +157
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Suggested change
if (!$this->storage) {
// marked as initialized but no storage set
// this is probably because some code path has caused recursion during the share setup
// we setup a "failed storage" so `getWrapperStorage` doesn't return null.
// If the share setup completes after this the "failed storage" will be overwritten by the correct one
$this->logger->warning('Possible share setup recursion detected');
$this->storage = new FailedStorage(['exception' => new \Exception('Possible share setup recursion detected')]);
$this->cache = new FailedCache();
$this->rootPath = '';
}
if (!$this->storage) {
// marked as initialized but no storage set
// this is probably because some code path has caused recursion during the share setup
// we setup a "failed storage" so `getWrapperStorage` doesn't return null.
// If the share setup completes after this the "failed storage" will be overwritten by the correct one
throw new \Exception('Possible share setup recursion detected')]);
}

This should work then, and it would be caught by the try/catch below?
Not sure if it’s cleaner because it would mean the function is now throwing.

return;
}

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