From d2ed2150ca4c6dc84e77cbae930f6233354d9961 Mon Sep 17 00:00:00 2001
From: Arseny Kapoulkine <arseny.kapoulkine@gmail.com>
Date: Fri, 15 Mar 2024 09:32:27 -0700
Subject: [PATCH] Work around ASLR+ASAN compatibility issues in GHA (#1203)

vm.mmap_rnd_bits has been recently changed to 32 on GHA, which triggers
issues in ASAN builds that spuriously fail on startup. The fix requires
a more recent clang/gcc than the agents have available (clang 17, not
sure what GCC version), so for now we need to work around this by
restricting the ASLR randomness.

See https://github.com/google/sanitizers/issues/1614
---
 .github/workflows/build.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e6a012558..7a2b5f105 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,6 +25,9 @@ jobs:
     runs-on: ${{matrix.os.version}}
     steps:
     - uses: actions/checkout@v1
+    - name: work around ASLR+ASAN compatibility
+      run: sudo sysctl -w vm.mmap_rnd_bits=28
+      if: matrix.os.name == 'ubuntu'
     - name: make tests
       run: |
         make -j2 config=sanitize werror=1 native=1 luau-tests