Misc libafl-fuzz improvements (#2463)

* libafl-fuzz: ignore seeds that are not regular files

* libafl-fuzz: remove 4 dict files limit

* libafl-fuzz: clippy

* libafl-fuzz: add -t option

* libafl-fuzz: fix typo in seed feedback

Author: R9295

fuzzers/others/libafl-fuzz/src/corpus.rs

@@ -144,13 +144,20 @@ pub fn check_autoresume(
         // Copy all our seeds to queue
         for file in std::fs::read_dir(intial_inputs)? {
             let path = file?.path();
-            std::fs::copy(
+            let cpy_res = std::fs::copy(
                 &path,
                 queue_dir.join(path.file_name().ok_or(Error::illegal_state(format!(
                     "file {} in input directory does not have a filename",
                     path.display()
                 )))?),
-            )?;
+            );
+            if let Err(e) = cpy_res {
+                if matches!(e.kind(), io::ErrorKind::InvalidInput) {
+                    println!("skipping {} since it is not a regular file", path.display());
+                } else {
+                    return Err(e.into());
+                }
+            }
         }
     }
     Ok(file)

fuzzers/others/libafl-fuzz/src/feedback/seed.rs

@@ -34,7 +34,7 @@ where
     pub fn new(inner: A, opt: &Opt) -> Self {
         Self {
             inner,
-            ignore_timeouts: opt.ignore_seed_issues,
+            ignore_timeouts: opt.ignore_timeouts,
             ignore_seed_issues: opt.ignore_seed_issues,
             exit_on_seed_issues: opt.exit_on_seed_issues,
             phantom: PhantomData,

fuzzers/others/libafl-fuzz/src/main.rs

@@ -134,8 +134,8 @@ struct Opt {
     /// sync to a foreign fuzzer queue directory (requires -M, can be specified up to 32 times)
     #[arg(short = 'F', num_args = 32)]
     foreign_sync_dirs: Vec<PathBuf>,
-    /// fuzzer dictionary (see README.md, specify up to 4 times)
-    #[arg(short = 'x', num_args = 4)]
+    /// fuzzer dictionary (see README.md)
+    #[arg(short = 'x')]
     dicts: Vec<PathBuf>,
     // Environment + CLI variables
     #[arg(short = 'G')]
@@ -152,13 +152,16 @@ struct Opt {
     #[arg(short = 'V')]
     fuzz_for_seconds: Option<usize>,
 
+    /// timeout for each run
+    #[arg(short = 't', default_value_t = 1000)]
+    hang_timeout: u64,
+
     // Environment Variables
     #[clap(skip)]
     bench_just_one: bool,
     #[clap(skip)]
     bench_until_crash: bool,
-    #[clap(skip)]
-    hang_timeout: u64,
+
     #[clap(skip)]
     debug_child: bool,
     #[clap(skip)]