From dd3e38d3e86c76c869ad2ffbe7cd77c38c106c06 Mon Sep 17 00:00:00 2001
From: Kleis Auke Wolthuizen <github@kleisauke.nl>
Date: Sat, 20 Jul 2024 18:55:39 +0200
Subject: [PATCH] sharp: add seed corpus (#12256)

---
 projects/sharp/Dockerfile | 2 ++
 projects/sharp/build.sh   | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/projects/sharp/Dockerfile b/projects/sharp/Dockerfile
index c16814970..e155b8e94 100644
--- a/projects/sharp/Dockerfile
+++ b/projects/sharp/Dockerfile
@@ -16,6 +16,8 @@
 
 FROM gcr.io/oss-fuzz-base/base-builder-javascript
 
+RUN mkdir afl-testcases
+RUN curl https://lcamtuf.coredump.cx/afl/demo/afl_testcases.tgz | tar xzC afl-testcases
 RUN git clone --depth 1 https://github.com/lovell/sharp.git
 
 COPY build.sh $SRC/
diff --git a/projects/sharp/build.sh b/projects/sharp/build.sh
index 041a61ff5..b05303671 100644
--- a/projects/sharp/build.sh
+++ b/projects/sharp/build.sh
@@ -22,3 +22,12 @@ npm install --save-dev @jazzer.js/core
 
 # Build Fuzzers.
 compile_javascript_fuzzer sharp fuzz.js -i sharp
+
+# Merge the seed corpus in a single directory, exclude files larger than 4k
+mkdir -p fuzz/corpus
+find \
+  $SRC/afl-testcases/{gif*,jpeg*,png,tiff,webp}/full/images \
+  test/fixtures \
+  -type f -size -4k \
+  -exec bash -c 'hash=($(sha1sum {})); mv {} fuzz/corpus/$hash' \;
+zip -jrq $OUT/fuzz_seed_corpus.zip fuzz/corpus