From 537b317273b2ead1734198716cafe4e5e4544906 Mon Sep 17 00:00:00 2001
From: Norman Feske <norman.feske@genode-labs.com>
Date: Wed, 1 Jul 2020 18:38:19 +0200
Subject: [PATCH] nitpicker: handle failed try_alloc_texture

Fixes #3782
---
 repos/os/src/server/nitpicker/gui_session.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/repos/os/src/server/nitpicker/gui_session.cc b/repos/os/src/server/nitpicker/gui_session.cc
index af5177b8bb..24e9722e26 100644
--- a/repos/os/src/server/nitpicker/gui_session.cc
+++ b/repos/os/src/server/nitpicker/gui_session.cc
@@ -504,6 +504,12 @@ Buffer *Gui_session::realloc_buffer(Framebuffer::Mode mode, bool use_alpha)
 
 	Chunky_texture<PT> * const texture = try_alloc_texture();
 
+	if (!texture) {
+		_release_buffer();
+		_ram_quota_guard().try_downgrade(temporary_ram_upgrade);
+		return nullptr;
+	}
+
 	/* copy old buffer content into new buffer and release old buffer */
 	if (src_texture) {