ci: run miri

Author: phip1611

.github/workflows/_build-rust.yml

@@ -33,6 +33,11 @@ on:
         required: false
         default: true
         description: Execute tests.
+      do-miri:
+        type: boolean
+        required: false
+        default: false
+        description: Execute tests with miri.
 
 jobs:
   check_rust:
@@ -80,3 +85,9 @@ jobs:
           curl -LsSf https://get.nexte.st/latest/linux | tar zxf -
           chmod u+x cargo-nextest
           ./cargo-nextest nextest run --features ${{ inputs.features }}
+      # Only works with nightly.
+      - name: Unit Test with Miri
+        if: ${{ inputs.do-miri }}
+        run: |
+          rustup component add miri
+          cargo miri test --features ${{ inputs.features }}

.github/workflows/rust.yml

@@ -95,3 +95,14 @@ jobs:
       do-style-check: true
       do-test: false
       features: unstable
+
+  miri:
+    name: tests with miri
+    needs: build_nightly
+    uses: ./.github/workflows/_build-rust.yml
+    with:
+      rust-version: nightly
+      do-style-check: false
+      do-test: false
+      do-miri: true
+      features: unstable

multiboot2/src/boot_loader_name.rs

@@ -31,7 +31,8 @@ impl BootLoaderNameTag {
         use core::{mem, slice, str};
         // strlen without null byte
         let strlen = self.size as usize - mem::size_of::<BootLoaderNameTag>();
-        let bytes = unsafe { slice::from_raw_parts((&self.string) as *const u8, strlen) };
+        let cstring = core::ptr::addr_of!(self.string);
+        let bytes = unsafe { slice::from_raw_parts(cstring, strlen) };
         str::from_utf8(bytes)
     }
 }