Merge pull request #8752 from nextcloud/13-8112

[stable13] Fix integer overflow in ChunkingPlugin

1 files changed, 4 insertions, 1 deletions

diff --git a/apps/dav/lib/Upload/ChunkingPlugin.php b/apps/dav/lib/Upload/ChunkingPlugin.php
index 5768f53c2b4..858129dd598 100644
--- a/apps/dav/lib/Upload/ChunkingPlugin.php
+++ b/apps/dav/lib/Upload/ChunkingPlugin.php
@@ -99,7 +99,10 @@ class ChunkingPlugin extends ServerPlugin {
 			return;
 		}
 		$actualSize = $this->sourceNode->getSize();
-		if ((int)$expectedSize !== $actualSize) {
+
+		// casted to string because cast to float cause equality for non equal numbers
+		// and integer has the problem of limited size on 32 bit systems
+		if ((string)$expectedSize !== (string)$actualSize) {
 			throw new BadRequest("Chunks on server do not sum up to $expectedSize but to $actualSize bytes");
 		}
 	}