From 1f034000a5343c6580338b1b306307525df5f6bf Mon Sep 17 00:00:00 2001
From: Evgeny Vereshchagin <evvers@ya.ru>
Date: Thu, 21 May 2020 08:20:01 +0200
Subject: [PATCH] oss-fuzz: turn on the pointer-overflow check

It's off by default on OSS-Fuzz but it should be safe to turn it on
manually: https://github.com/google/oss-fuzz/issues/659#issuecomment-631897889

Just a follow-up to https://github.com/systemd/systemd/pull/15865.
---
 tools/oss-fuzz.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/oss-fuzz.sh b/tools/oss-fuzz.sh
index 79846f8787..5b8690b687 100755
--- a/tools/oss-fuzz.sh
+++ b/tools/oss-fuzz.sh
@@ -27,9 +27,15 @@ build=$WORK/build
 rm -rf $build
 mkdir -p $build
 
-fuzzflag="oss-fuzz=true"
 if [ -z "$FUZZING_ENGINE" ]; then
     fuzzflag="llvm-fuzz=true"
+else
+    fuzzflag="oss-fuzz=true"
+    if [[ "$SANITIZER" == undefined ]]; then
+        UBSAN_FLAGS="-fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow"
+        CFLAGS="$CFLAGS $UBSAN_FLAGS"
+        CXXFLAGS="$CXXFLAGS $UBSAN_FLAGS"
+    fi
 fi
 
 meson $build -D$fuzzflag -Db_lundef=false