From 420eaa998ed8e3069f8137fb4bf16a75475291a7 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Wed, 30 Apr 2025 00:52:46 +0200
Subject: [PATCH] haskell.compiler.*: fix stack overrun on 32bit platforms
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Could be observed by executing GHCi or running isocline's “test suite”.
---
 pkgs/development/compilers/ghc/common-hadrian.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkgs/development/compilers/ghc/common-hadrian.nix b/pkgs/development/compilers/ghc/common-hadrian.nix
index e180d684c359..a78b8a1a90da 100644
--- a/pkgs/development/compilers/ghc/common-hadrian.nix
+++ b/pkgs/development/compilers/ghc/common-hadrian.nix
@@ -279,6 +279,17 @@
           includes = [ "configure.ac" ];
           hash = "sha256-L3FQvcm9QB59BOiR2g5/HACAufIG08HiT53EIOjj64g=";
         })
+      ]
+      # Fixes stack overrun in rts which crashes an process whenever
+      # freeHaskellFunPtr is called with nixpkgs' hardening flags.
+      # https://gitlab.haskell.org/ghc/ghc/-/issues/25485
+      # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13599
+      ++ lib.optionals (lib.versionOlder version "9.13") [
+        (fetchpatch {
+          name = "ghc-rts-adjustor-fix-i386-stack-overrun.patch";
+          url = "https://gitlab.haskell.org/ghc/ghc/-/commit/39bb6e583d64738db51441a556d499aa93a4fc4a.patch";
+          sha256 = "0w5fx413z924bi2irsy1l4xapxxhrq158b5gn6jzrbsmhvmpirs0";
+        })
       ];
 
     stdenv = stdenvNoCC;