From 890c4696c437709c7a5da1960ae16cfb33f9b88c Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Mon, 6 Jan 2025 22:14:56 +0100
Subject: [PATCH] fuzzers: add a fuzzer for LIBERTIFF driver

Fixes #11523
---
 fuzzers/CMakeLists.txt              | 10 ++++++++++
 fuzzers/build_google_oss_fuzzers.sh |  2 ++
 fuzzers/gdal_fuzzer.cpp             | 10 +++++++++-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/fuzzers/CMakeLists.txt b/fuzzers/CMakeLists.txt
index 5cf1b6dc73bf..22347958d5d9 100644
--- a/fuzzers/CMakeLists.txt
+++ b/fuzzers/CMakeLists.txt
@@ -124,6 +124,16 @@ build_gdal_specialized_fuzzer(gdal_sdts GDALRegister_SDTS "/vsimem/test.tar" "/v
 build_gdal_specialized_fuzzer(gdal_vrt GDALAllRegister "/vsimem/test.tar" "/vsitar//vsimem/test.tar/test.vrt")
 build_gdal_specialized_fuzzer(ers GDALRegister_ERS "/vsimem/test.tar" "/vsitar//vsimem/test.tar/test.ers")
 
+build_fuzzer(
+    NAME
+    libertiff_fuzzer
+    SOURCES
+    gdal_fuzzer.cpp
+    DEFINITIONS
+    -DREGISTER_FUNC=GDALRegister_LIBERTIFF
+    -DDRIVER_NAME="LIBERTIFF"
+)
+
 build_fuzzer(
   NAME
   gdal_filesystem_fuzzer
diff --git a/fuzzers/build_google_oss_fuzzers.sh b/fuzzers/build_google_oss_fuzzers.sh
index ad0b2c2a863c..3035cae6f5db 100755
--- a/fuzzers/build_google_oss_fuzzers.sh
+++ b/fuzzers/build_google_oss_fuzzers.sh
@@ -69,6 +69,8 @@ build_gdal_specialized_fuzzer()
 
 build_fuzzer gtiff_mmap $(dirname $0)/gdal_fuzzer.cpp -DREGISTER_FUNC=GDALRegister_GTiff -DGTIFF_USE_MMAP
 
+build_fuzzer libertiff $(dirname $0)/gdal_fuzzer.cpp -DREGISTER_FUNC=GDALRegister_LIBERTIFF -DDRIVER_NAME="\"LIBERTIFF\""
+
 fuzzerFiles="$(dirname $0)/*.cpp"
 for F in $fuzzerFiles; do
     if test $F != "$(dirname $0)/fuzzingengine.cpp"; then
diff --git a/fuzzers/gdal_fuzzer.cpp b/fuzzers/gdal_fuzzer.cpp
index 495862edd992..ef66a37c8c17 100644
--- a/fuzzers/gdal_fuzzer.cpp
+++ b/fuzzers/gdal_fuzzer.cpp
@@ -213,7 +213,15 @@ int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
 #else
     const char *pszGDALFilename = GDAL_FILENAME;
 #endif
-    GDALDatasetH hDS = GDALOpen(pszGDALFilename, GA_ReadOnly);
+
+#ifdef DRIVER_NAME
+    const char *const apszAllowedDrivers[] = {DRIVER_NAME, nullptr};
+#else
+    const char *const *apszAllowedDrivers = nullptr;
+#endif
+
+    GDALDatasetH hDS = GDALOpenEx(pszGDALFilename, GDAL_OF_RASTER,
+                                  apszAllowedDrivers, nullptr, nullptr);
     if (hDS)
     {
         const int nTotalBands = GDALGetRasterCount(hDS);