Fix ASLR to be smaller during asan/tsan/ubsan runs

Recently asan/tsan/ubsan runs have been failing randomly.  It appears
that a recent runner update may have led to the Address Space Layout
Randomization setting in the linux kernel of ubuntu-latest runner
getting set to too high a value (it defaults to 30).  Such a setting
leads to the possibility that a given application will have memory
mapped to an address space that the sanitizer code typically uses to do
its job.  Lowering this value allows a/t/ubsan to work consistently
again

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23842)

4 files changed, 36 insertions, 0 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e21381ae98..cfab096ddf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -205,6 +205,10 @@ jobs:
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: ./config --banner=Configured --debug enable-asan enable-ubsan no-cached-fetch no-fips no-dtls no-tls1 no-tls1-method no-tls1_1 no-tls1_1-method no-async && perl configdata.pm --dump
     - name: make
@@ -222,6 +226,10 @@ jobs:
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: ./config --banner=Configured --debug enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips && perl configdata.pm --dump
     - name: make
@@ -239,6 +247,10 @@ jobs:
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: ./config --banner=Configured --debug -DPEDANTIC -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-weak-ssl-ciphers enable-ssl3 enable-ssl3-method enable-nextprotoneg && perl configdata.pm --dump
     - name: make
@@ -256,6 +268,10 @@ jobs:
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       # --debug -O1 is to produce a debug build that runs in a reasonable amount of time
       run: CC=clang ./config --banner=Configured --debug -O1 -fsanitize=memory -DOSSL_SANITIZE_MEMORY -fno-optimize-sibling-calls enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips && perl configdata.pm --dump
@@ -274,6 +290,10 @@ jobs:
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: CC=clang ./config --banner=Configured no-fips --strict-warnings -fsanitize=thread && perl configdata.pm --dump
     - name: make
diff --git a/.github/workflows/fuzz-checker.yml b/.github/workflows/fuzz-checker.yml
index 766a4a1326..08dc7d54db 100644
--- a/.github/workflows/fuzz-checker.yml
+++ b/.github/workflows/fuzz-checker.yml
@@ -48,6 +48,10 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get -yq --force-yes install ${{ matrix.fuzzy.install }}
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - uses: actions/checkout@v4
 
     - name: config
diff --git a/.github/workflows/run-checker-daily.yml b/.github/workflows/run-checker-daily.yml
index 6d40078122..5ad006e269 100644
--- a/.github/workflows/run-checker-daily.yml
+++ b/.github/workflows/run-checker-daily.yml
@@ -269,6 +269,10 @@ jobs:
       uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: ./config --banner=Configured --debug enable-asan enable-ubsan enable-comp enable-brotli -DPEDANTIC && perl configdata.pm --dump
     - name: make
@@ -291,6 +295,10 @@ jobs:
       uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
       run: ./config --banner=Configured --debug enable-asan enable-ubsan enable-comp enable-zstd -DPEDANTIC && perl configdata.pm --dump
     - name: make
diff --git a/.github/workflows/run-checker-merge.yml b/.github/workflows/run-checker-merge.yml
index c5958a5b99..e776d92239 100644
--- a/.github/workflows/run-checker-merge.yml
+++ b/.github/workflows/run-checker-merge.yml
@@ -38,6 +38,10 @@ jobs:
         ]
     runs-on: ubuntu-latest
     steps:
+    - name: Adjust ASLR for sanitizer
+      run: |
+        sudo cat /proc/sys/vm/mmap_rnd_bits
+        sudo sysctl -w vm.mmap_rnd_bits=28
     - uses: actions/checkout@v4
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora