Fix Rust 2021 clippy

libafl_qemu/src/helpers.rs

@@ -138,6 +138,12 @@ impl QemuEdgeCoverageHelper {
     }
 }
 
+impl Default for QemuEdgeCoverageHelper {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl<I, S> QemuHelper<I, S> for QemuEdgeCoverageHelper
 where
     I: Input,
@@ -177,6 +183,12 @@ impl QemuCmpLogHelper {
     }
 }
 
+impl Default for QemuCmpLogHelper {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl<I, S> QemuHelper<I, S> for QemuCmpLogHelper
 where
     I: Input,
@@ -292,6 +304,12 @@ impl QemuSnapshotHelper {
     }
 }
 
+impl Default for QemuSnapshotHelper {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl<I, S> QemuHelper<I, S> for QemuSnapshotHelper
 where
     I: Input,

libafl_targets/src/sancov_8bit.rs

@@ -9,6 +9,8 @@ pub static mut COUNTERS_MAPS: Vec<&'static mut [u8]> = Vec::new();
 /// # Safety
 /// Set up our coverage maps.
 #[no_mangle]
+#[allow(clippy::cast_sign_loss)]
+#[allow(clippy::not_unsafe_ptr_arg_deref)]
 pub fn __sanitizer_cov_8bit_counters_init(start: *mut u8, stop: *mut u8) {
     unsafe { COUNTERS_MAPS.push(from_raw_parts_mut(start, stop.offset_from(start) as usize)) }
 }