Add Address Sanitizer exceptions to fuzzing targets, see image-rs#80 …

…and rust-lang/rust#41807
Shnatsel · Jun 27, 2018 · 5c60ae1 · 5c60ae1
1 parent 4da73cd
commit 5c60ae1
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/fuzz/fuzz_targets/fuzz_target_1.rs b/fuzz/fuzz_targets/fuzz_target_1.rs
@@ -2,6 +2,16 @@
 #[macro_use] extern crate libfuzzer_sys;
 extern crate png;
 
+// allocator_may_return_null=1 prevents crash on allocating huge amounts of memory, see #80
+// detect_odr_violation=0 is for https://github.com/rust-lang/rust/issues/41807
+const ASAN_DEFAULT_OPTIONS: &'static [u8] = b"allocator_may_return_null=1,detect_odr_violation=0\0";
+
+#[no_mangle]
+pub extern "C" fn __asan_default_options() -> *const u8 {
+    ASAN_DEFAULT_OPTIONS as *const [u8] as *const u8
+}
+
+
 #[inline(always)]
 fn png_decode(data: &[u8]) -> Result<(png::OutputInfo, Vec<u8>), ()> {
     let decoder = png::Decoder::new(data);

diff --git a/png-afl/src/main.rs b/png-afl/src/main.rs
@@ -1,7 +1,9 @@
 extern crate afl;
 extern crate png;
 
-const ASAN_DEFAULT_OPTIONS: &'static [u8] = b"detect_odr_violation=1\0";
+// allocator_may_return_null=1 prevents crash on allocating huge amounts of memory, see #80
+// detect_odr_violation=0 is for https://github.com/rust-lang/rust/issues/41807
+const ASAN_DEFAULT_OPTIONS: &'static [u8] = b"allocator_may_return_null=1,detect_odr_violation=0\0";
 
 #[no_mangle]
 pub extern "C" fn __asan_default_options() -> *const u8 {