1 files changed, 12 insertions, 3 deletions
diff --git a/includes/Setup.php b/includes/Setup.php
index b3bf0fca..1b6d66c0 100644
--- a/includes/Setup.php
+++ b/includes/Setup.php
@@ -368,6 +368,15 @@ if ( $wgResourceLoaderMaxQueryLength === false ) {
 	unset($suhosinMaxValueLength);
 }
 
+// Ensure the minimum chunk size is less than PHP upload limits or the maximum
+// upload size.
+$wgMinUploadChunkSize = min(
+	$wgMinUploadChunkSize,
+	$wgMaxUploadSize,
+	wfShorthandToInteger( ini_get( 'upload_max_filesize' ), 1e100 ),
+	wfShorthandToInteger( ini_get( 'post_max_size' ), 1e100) - 1024 # Leave room for other parameters
+);
+
 /**
  * Definitions of the NS_ constants are in Defines.php
  * @private
@@ -502,11 +511,11 @@ unset( $serverParts );
 
 // Set defaults for configuration variables
 // that are derived from the server name by default
-if ( $wgEmergencyContact === false ) {
+// Note: $wgEmergencyContact and $wgPasswordSender may be false or empty string (T104142)
+if ( !$wgEmergencyContact ) {
 	$wgEmergencyContact = 'wikiadmin@' . $wgServerName;
 }
-
-if ( $wgPasswordSender === false ) {
+if ( !$wgPasswordSender ) {
 	$wgPasswordSender = 'apache@' . $wgServerName;
 }