From d62086e6fc2fdf8d5f5d45e697edac418e6bad0f Mon Sep 17 00:00:00 2001
From: Joachim Fasting <joachifm@fastmail.fm>
Date: Sat, 5 Jan 2019 13:44:54 +0100
Subject: [PATCH] hardened-config: allow slub/slab free poisoning

---
 pkgs/os-specific/linux/kernel/hardened-config.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/hardened-config.nix b/pkgs/os-specific/linux/kernel/hardened-config.nix
index 62bd4945a66..ed540a9e751 100644
--- a/pkgs/os-specific/linux/kernel/hardened-config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened-config.nix
@@ -99,6 +99,9 @@ ${optionalString (versionAtLeast version "4.14") ''
   SLAB_FREELIST_HARDENED y
 ''}
 
+# Allow enabling slub/slab free poisoning with slub_debug=P
+SLUB_DEBUG y
+
 # Wipe higher-level memory allocations on free() with page_poison=1
 PAGE_POISONING y
 PAGE_POISONING_NO_SANITY y