From 4b97e1614bf3574e0252795da7d87e0759948cc9 Mon Sep 17 00:00:00 2001
From: Git'Fellow <12234510+solracsf@users.noreply.github.com>
Date: Thu, 27 Apr 2023 16:38:32 +0200
Subject: [PATCH 1/2] Check for open_basedir before reading /proc

Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>
---
 lib/private/Preview/Generator.php | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/private/Preview/Generator.php b/lib/private/Preview/Generator.php
index c83cdb96e2719..e88c307517de4 100644
--- a/lib/private/Preview/Generator.php
+++ b/lib/private/Preview/Generator.php
@@ -264,8 +264,20 @@ public static function unguardWithSemaphore(false|\SysvSemaphore $semId): bool {
 	public static function getHardwareConcurrency(): int {
 		static $width;
 		if (!isset($width)) {
-			if (is_file("/proc/cpuinfo")) {
-				$width = substr_count(file_get_contents("/proc/cpuinfo"), "processor");
+			if (function_exists('ini_get')) {
+				$openBasedir = ini_get('open_basedir');
+				if ($openBasedir == '') {
+					$width = is_readable('/proc/cpuinfo') ? substr_count(file_get_contents('/proc/cpuinfo'), 'processor') : 0;
+				} else {
+					$openBasedirPaths = explode(':', $openBasedir);
+					foreach ($openBasedirPaths as $path) {
+						if (strpos($path, '/proc') === 0 || $path === '/proc/cpuinfo') {
+							$width = is_readable('/proc/cpuinfo') ? substr_count(file_get_contents('/proc/cpuinfo'), 'processor') : 0;
+						} else {
+							$width = 0;
+						}
+					}
+				}
 			} else {
 				$width = 0;
 			}

From febc24db137f585de2b6871ac64e474b07142f65 Mon Sep 17 00:00:00 2001
From: Git'Fellow <12234510+solracsf@users.noreply.github.com>
Date: Thu, 27 Apr 2023 19:26:59 +0200
Subject: [PATCH 2/2] Us strpos() only

Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>
---
 lib/private/Preview/Generator.php | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/lib/private/Preview/Generator.php b/lib/private/Preview/Generator.php
index e88c307517de4..f1a43ee9128a6 100644
--- a/lib/private/Preview/Generator.php
+++ b/lib/private/Preview/Generator.php
@@ -263,20 +263,14 @@ public static function unguardWithSemaphore(false|\SysvSemaphore $semId): bool {
 	 */
 	public static function getHardwareConcurrency(): int {
 		static $width;
+
 		if (!isset($width)) {
 			if (function_exists('ini_get')) {
 				$openBasedir = ini_get('open_basedir');
-				if ($openBasedir == '') {
+				if (empty($openBasedir) || strpos($openBasedir, '/proc/cpuinfo') !== false) {
 					$width = is_readable('/proc/cpuinfo') ? substr_count(file_get_contents('/proc/cpuinfo'), 'processor') : 0;
 				} else {
-					$openBasedirPaths = explode(':', $openBasedir);
-					foreach ($openBasedirPaths as $path) {
-						if (strpos($path, '/proc') === 0 || $path === '/proc/cpuinfo') {
-							$width = is_readable('/proc/cpuinfo') ? substr_count(file_get_contents('/proc/cpuinfo'), 'processor') : 0;
-						} else {
-							$width = 0;
-						}
-					}
+					$width = 0;
 				}
 			} else {
 				$width = 0;