Raise imports and exports limit to 1,000,000

See WebAssembly/spec#1766 and WebAssembly/design#1520 for details.
fitzgen · Jul 16, 2024 · b3a54b1 · b3a54b1
1 parent a4c4021
commit b3a54b1
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Showing 2 changed files with 13 additions and 2 deletions.
diff --git a/crates/wasmparser/src/limits.rs b/crates/wasmparser/src/limits.rs
@@ -20,7 +20,8 @@
 pub const MAX_WASM_TYPES: usize = 1_000_000;
 pub const MAX_WASM_SUPERTYPES: usize = 1;
 pub const MAX_WASM_FUNCTIONS: usize = 1_000_000;
-pub const MAX_WASM_EXPORTS: usize = 100_000;
+pub const MAX_WASM_IMPORTS: usize = 1_000_000;
+pub const MAX_WASM_EXPORTS: usize = 1_000_000;
 pub const MAX_WASM_GLOBALS: usize = 1_000_000;
 pub const MAX_WASM_ELEMENT_SEGMENTS: usize = 100_000;
 pub const MAX_WASM_DATA_SEGMENTS: usize = 100_000;

diff --git a/crates/wasmparser/src/validator.rs b/crates/wasmparser/src/validator.rs
@@ -677,7 +677,17 @@ impl Validator {
             Order::Import,
             section,
             "import",
-            |_, _, _, _, _| Ok(()), // add_import will check limits
+            |state, _, _, count, offset| {
+                check_max(
+                    state.module.imports.len(),
+                    count,
+                    MAX_WASM_IMPORTS,
+                    "imports",
+                    offset,
+                )?;
+                state.module.assert_mut().imports.reserve(count as usize);
+                Ok(())
+            },
             |state, features, types, import, offset| {
                 state
                     .module