piecrust: fix overflow in ICC gas limit calculation

dusk-network · Feb 7, 2024 · 3228361 · 3228361
1 parent ac38650
commit 3228361
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diff --git a/piecrust/CHANGELOG.md b/piecrust/CHANGELOG.md
@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Upgrade `dusk-wasmtime` to version `17`
 
+### Fixed
+
+- Fix overflow in gas limit calculation in inter-contract call
+
 ## [0.15.0] - 2024-01-24
 
 ### Changed

diff --git a/piecrust/src/imports.rs b/piecrust/src/imports.rs
@@ -209,7 +209,9 @@ pub(crate) fn c(
     let callee_limit = if gas_limit > 0 && gas_limit < caller_remaining {
         gas_limit
     } else {
-        caller_remaining * GAS_PASS_PCT / 100
+        let div = caller_remaining / 100 * GAS_PASS_PCT;
+        let rem = caller_remaining % 100 * GAS_PASS_PCT / 100;
+        div + rem
     };
 
     let with_memory = |memory: &mut [u8]| -> Result<_, Error> {