add: num_signatures == 0 check from SIMD-0152

anza-xyz · Oct 13, 2024 · 0f4876e · 0f4876e
1 parent 226eeef
commit 0f4876e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/sdk/src/ed25519_instruction.rs b/sdk/src/ed25519_instruction.rs
@@ -93,6 +93,9 @@ pub fn verify(
         return Err(PrecompileError::InvalidInstructionDataSize);
     }
     let num_signatures = data[0] as usize;
+    if num_signatures == 0 {
+        return Err(PrecompileError::InvalidInstructionDataSize);
+    }
     if num_signatures == 0 && data.len() > SIGNATURE_OFFSETS_START {
         return Err(PrecompileError::InvalidInstructionDataSize);
     }