add fuzz tests for 10 more crates, and related fixes

Co-authored-by: Sebastian Thiel <sebastian.thiel@icloud.com>

Author: codex

.config/nextest.toml

@@ -1,2 +1,7 @@
+[profile.default]
+# it doesn't scale for me on macOS at least :/
+test-threads = 6
+fail-fast = false
+
 [profile.with-xml.junit]
 path = "junit.xml"

gix-actor/fuzz/.gitignore

@@ -0,0 +1,3 @@
+target
+corpus
+coverage

gix-actor/fuzz/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "gix-actor-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.gix-actor]
+path = ".."
+
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "actors"
+path = "fuzz_targets/actors.rs"
+test = false
+doc = false

gix-actor/fuzz/corpus/actors/identity.txt

@@ -0,0 +1 @@
+Sebastian Thiel <byronimo@gmail.com>

gix-actor/fuzz/corpus/actors/lenient-identity.txt

@@ -0,0 +1 @@
+First Last<<fl <First Last<fl@openoffice.org >> >

gix-actor/fuzz/corpus/actors/signature.txt

@@ -0,0 +1 @@
+Sebastian Thiel <byronimo@gmail.com> 1528473343 +0230

gix-actor/fuzz/fuzz_targets/actors.rs

@@ -0,0 +1,33 @@
+#![no_main]
+
+use gix_actor::{IdentityRef, Signature, SignatureRef};
+use libfuzzer_sys::fuzz_target;
+use std::hint::black_box;
+
+fn inspect_identity(identity: IdentityRef<'_>) {
+    _ = black_box(identity.trim());
+    _ = black_box(identity.to_owned());
+    let mut out = Vec::new();
+    _ = black_box(identity.write_to(&mut out));
+    _ = black_box(out);
+}
+
+fn inspect_signature(signature: SignatureRef<'_>) {
+    _ = black_box(signature.trim());
+    _ = black_box(signature.actor());
+    _ = black_box(signature.seconds());
+    _ = black_box(signature.time());
+    _ = black_box(signature.to_owned());
+    let mut out = Vec::new();
+    _ = black_box(signature.write_to(&mut out));
+    _ = black_box(out);
+}
+
+fuzz_target!(|input: &[u8]| {
+    if let Ok(identity) = IdentityRef::from_bytes::<()>(input) {
+        inspect_identity(identity);
+    }
+    if let Ok(signature) = SignatureRef::from_bytes::<()>(input) {
+        inspect_signature(signature);
+    }
+});

gix-attributes/fuzz/.gitignore

@@ -1,8 +1,3 @@
 target
 corpus
-artifacts
 coverage
-
-# These usually involve a lot of local CPU time, keep them.
-$artifacts
-$corpus

gix-bitmap/fuzz/.gitignore

@@ -0,0 +1,3 @@
+target
+corpus
+coverage

gix-bitmap/fuzz/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "gix-bitmap-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.gix-bitmap]
+path = ".."
+
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "ewah"
+path = "fuzz_targets/ewah.rs"
+test = false
+doc = false