fuzz: add logging to fuzz targets

linkerd/addr/fuzz/Cargo.lock

@@ -0,0 +1,304 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "arbitrary"
+version = "1.0.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "698b65a961a9d730fb45b6b0327e20207810c9f61ee421b082b27ba003f49e2b"
+
+[[package]]
+name = "bumpalo"
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "63396b8a4b9de3f4fdfb320ab6080762242f66a8ef174c49d8e19b674db4cdbe"
+
+[[package]]
+name = "bytes"
+version = "1.0.1"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "b700ce4376041dcd0a327fd0097c41095743c4c8af8887265942faf1100bd040"
+
+[[package]]
+name = "cc"
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "http"
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.7"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
+
+[[package]]
+name = "js-sys"
+version = "0.3.50"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "2d99f9e3e84b8f67f846ef5b4cbbc3b1c29f6c759fcbce6f01aa0e73d932a24c"
+dependencies = [
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.93"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
+
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "86c975d637bc2a2f99440932b731491fc34c7f785d239e38af3addd3c2fd0e46"
+dependencies = [
+ "arbitrary",
+ "cc",
+]
+
+[[package]]
+name = "linkerd-addr"
+version = "0.1.0"
+dependencies = [
+ "http",
+ "linkerd-dns-name",
+ "thiserror",
+]
+
+[[package]]
+name = "linkerd-addr-fuzz"
+version = "0.0.0"
+dependencies = [
+ "libfuzzer-sys",
+ "linkerd-addr",
+]
+
+[[package]]
+name = "linkerd-dns-name"
+version = "0.1.0"
+dependencies = [
+ "thiserror",
+ "untrusted",
+ "webpki",
+]
+
+[[package]]
+name = "log"
+version = "0.4.14"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.7.2"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
+
+[[package]]
+name = "proc-macro2"
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "a152013215dca273577e18d2bf00fa862b89b24169fb78c4c95aeb07992c9cec"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.9"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
+[[package]]
+name = "spin"
+version = "0.5.2"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+
+[[package]]
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+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "48fe99c6bd8b1cc636890bcc071842de909d902c81ac7dab53ba33c421ab8ffb"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.24"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "e0f4a65597094d4483ddaed134f409b2cb7c1beccf25201a9f73c719254fa98e"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.24"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "7765189610d8241a44529806d6fd1f2e0a08734313a35d5b3a556f92b381f3c0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.73"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "83240549659d187488f91f33c0f8547cbfef0b2088bc470c116d1d260ef623d9"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.73"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "ae70622411ca953215ca6d06d3ebeb1e915f0f6613e3b495122878d7ebec7dae"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.73"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "3e734d91443f177bfdb41969de821e15c516931c3c3db3d318fa1b68975d0f6f"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.73"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "d53739ff08c8a68b0fdbcd54c372b8ab800b1449ab3c9d706503bc7dd1621b2c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.73"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "d9a543ae66aa233d14bb765ed9af4a33e81b8b58d1584cf1b47ff8cd0b9e4489"
+
+[[package]]
+name = "web-sys"
+version = "0.3.50"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "a905d57e488fec8861446d3393670fb50d27a262344013181c2cdf9fff5481be"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki"
+version = "0.21.4"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "b8e38c0608262c46d4a56202ebabdeb094cef7e560ca7a226c6bf055188aa4ea"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+/~https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

linkerd/addr/fuzz/Cargo.toml

@@ -10,6 +10,8 @@ cargo-fuzz = true
 
 [dependencies]
 libfuzzer-sys = "0.4"
+tracing = "0.1.23"
+tracing-subscriber = "0.2.17"
 
 [dependencies.linkerd-addr]
 path = ".."

linkerd/addr/fuzz/fuzz_targets/fuzz_target_1.rs

@@ -1,9 +1,10 @@
 #![no_main]
 use libfuzzer_sys::fuzz_target;
 
-
 fuzz_target!(|data: &[u8]| {
+    let _ = tracing_subscriber::fmt::try_init();
     if let Ok(s) = std::str::from_utf8(data) {
+        tracing::info!(data = ?s, "running with input");
         linkerd_addr::fuzz_logic::fuzz_addr_1(s);
     }
 });

linkerd/app/inbound/fuzz/Cargo.toml

@@ -17,6 +17,8 @@ hyper = { version = "0.14.2", features = ["http1", "http2"] }
 http = "0.2"
 linkerd-app-core = { path = "../../core" }
 linkerd-app-test = { path = "../../test" }
+tracing = "0.1"
+tracing-subscriber = "0.2"
 
 [dependencies.linkerd-app-inbound]
 path = ".."

linkerd/app/inbound/fuzz/fuzz_targets/fuzz_target_1.rs

@@ -3,6 +3,8 @@ use libfuzzer_sys::fuzz_target;
 use linkerd_app_inbound::http::fuzz_logic::*;
 
 fuzz_target!(|requests: Vec<HttpRequestSpec>| {
+    let _ = tracing_subscriber::fmt::try_init();
+    tracing::info!(?requests, "running with input");
     if requests.len() == 0 {
         return;
     }

linkerd/app/inbound/src/http/mod.rs

@@ -270,8 +270,9 @@ pub mod fuzz_logic {
     };
     pub use linkerd_app_test as support;
     use linkerd_app_test::*;
+    use std::{fmt, str};
 
-    #[derive(Debug, Arbitrary)]
+    #[derive(Arbitrary)]
     pub struct HttpRequestSpec {
         pub uri: Vec<u8>,
         pub header_name: Vec<u8>,
@@ -378,4 +379,34 @@ pub mod fuzz_logic {
             .push_http_server()
             .into_inner()
     }
+
+    impl fmt::Debug for HttpRequestSpec {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            // Custom `Debug` impl that formats the URI, header name, and header
+            // value as strings if they are UTF-8, or falls back to raw bytes
+            // otherwise.
+            let mut dbg = f.debug_struct("HttpRequestSpec");
+            dbg.field("http_method", &self.http_method);
+
+            if let Ok(uri) = str::from_utf8(&self.uri[..]) {
+                dbg.field("uri", &uri);
+            } else {
+                dbg.field("uri", &self.uri);
+            }
+
+            if let Ok(name) = str::from_utf8(&self.header_name[..]) {
+                dbg.field("header_name", &name);
+            } else {
+                dbg.field("header_name", &self.header_name);
+            }
+
+            if let Ok(value) = str::from_utf8(&self.header_value[..]) {
+                dbg.field("header_value", &value);
+            } else {
+                dbg.field("header_value", &self.header_value);
+            }
+
+            dbg.finish()
+        }
+    }
 }

linkerd/dns/fuzz/Cargo.toml

@@ -12,6 +12,8 @@ cargo-fuzz = true
 [dependencies]
 libfuzzer-sys = "0.4"
 tokio = { version = "1", features = ["rt", "time", "io-util"] }
+tracing = "0.1.23"
+tracing-subscriber = "0.2.17"
 
 [dependencies.linkerd-dns]
 path = ".."