program: Use realloc with zero-init

program/src/extension/confidential_transfer/processor.rs

@@ -171,7 +171,7 @@ fn reallocate_for_configure_account_with_registry<'a>(
         "account needs realloc, +{:?} bytes",
         needed_account_len - token_account_info.data_len()
     );
-    token_account_info.realloc(needed_account_len, false)?;
+    token_account_info.realloc(needed_account_len, true)?;
 
     // if additional lamports needed to remain rent-exempt, transfer them
     let rent = Rent::get()?;

program/src/extension/mod.rs

@@ -1463,7 +1463,7 @@ pub(crate) fn alloc_and_serialize<S: BaseState + Pod, V: Default + Extension + P
 
     // Realloc the account first, if needed
     if new_account_len > previous_account_len {
-        account_info.realloc(new_account_len, false)?;
+        account_info.realloc(new_account_len, true)?;
     }
     let mut buffer = account_info.try_borrow_mut_data()?;
     if previous_account_len <= BASE_ACCOUNT_LENGTH {
@@ -1511,7 +1511,7 @@ pub(crate) fn alloc_and_serialize_variable_len_extension<
     if previous_account_len < new_account_len {
         // account size increased, so realloc the account, then the TLV entry, then
         // write data
-        account_info.realloc(new_account_len, false)?;
+        account_info.realloc(new_account_len, true)?;
         let mut buffer = account_info.try_borrow_mut_data()?;
         if extension_already_exists {
             let mut state = PodStateWithExtensionsMut::<S>::unpack(&mut buffer)?;
@@ -1541,7 +1541,7 @@ pub(crate) fn alloc_and_serialize_variable_len_extension<
         if removed_bytes > 0 {
             // this is probably fine, but be safe and avoid invalidating references
             drop(buffer);
-            account_info.realloc(new_account_len, false)?;
+            account_info.realloc(new_account_len, true)?;
         }
     }
     Ok(())

program/src/extension/reallocate.rs

@@ -70,7 +70,7 @@ pub fn process_reallocate(
         "account needs realloc, +{:?} bytes",
         needed_account_len - token_account_info.data_len()
     );
-    token_account_info.realloc(needed_account_len, false)?;
+    token_account_info.realloc(needed_account_len, true)?;
 
     // if additional lamports needed to remain rent-exempt, transfer them
     let rent = Rent::get()?;

program/src/processor.rs

@@ -2020,7 +2020,7 @@ fn delete_account(account_info: &AccountInfo) -> Result<(), ProgramError> {
 #[cfg(target_os = "solana")]
 fn delete_account(account_info: &AccountInfo) -> Result<(), ProgramError> {
     account_info.assign(&system_program::id());
-    account_info.realloc(0, false)
+    account_info.realloc(0, true)
 }
 
 #[cfg(test)]