From 515ef1f1ca018db7b244cd57f4dc7dbf879ef25f Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <antoine@python.org>
Date: Thu, 14 Mar 2024 19:06:48 +0100
Subject: [PATCH] GH-40558: [C++][CI] Fix TSAN crashes

---
 dev/tasks/docker-tests/github.linux.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dev/tasks/docker-tests/github.linux.yml b/dev/tasks/docker-tests/github.linux.yml
index 9616863b3bd73..13e00abc70a84 100644
--- a/dev/tasks/docker-tests/github.linux.yml
+++ b/dev/tasks/docker-tests/github.linux.yml
@@ -35,6 +35,8 @@ jobs:
         env:
         {{ macros.github_set_sccache_envvars()|indent(8) }}
         run: |
+          # GH-40558: reduce ASLR to avoid TSAN crashing
+          sudo sysctl -w vm.mmap_rnd_bits=28
           archery docker run \
             -e SETUPTOOLS_SCM_PRETEND_VERSION="{{ arrow.no_rc_version }}" \
             {{ flags|default("") }} \