From a2448c5f830d9ee908e4ba449ad146734036fdf9 Mon Sep 17 00:00:00 2001
From: bguillaumat <bastien.guillaumat@gmail.com>
Date: Wed, 25 Jan 2023 17:26:41 +0100
Subject: [PATCH] fix(execute_instruction): SQU-681 Prevent execute_instruction
 for auth 0

---
 programs/squads-mpl/src/lib.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/programs/squads-mpl/src/lib.rs b/programs/squads-mpl/src/lib.rs
index 1ef8a31..c71a134 100644
--- a/programs/squads-mpl/src/lib.rs
+++ b/programs/squads-mpl/src/lib.rs
@@ -443,7 +443,12 @@ pub mod squads_mpl {
         let ms_key = &ctx.accounts.multisig.key();
         let ms_ix = &mut ctx.accounts.instruction;
         let tx = &mut ctx.accounts.transaction;
-        
+
+        // To prevent potential failure with the Squad account auth 0 can't be executed in a specific instruction
+        if tx.authority_index == 0 {
+            return err!(MsError::InvalidAuthorityIndex);
+        }
+
         // setup the authority seeds
         let authority_seeds = [
             b"squad",