Reject faked stake/vote accounts in stake mgmt. (#13615)

* Reject faked stake/vote accounts in stake mgmt.

* Use clearer name

programs/stake/src/stake_instruction.rs

@@ -532,11 +532,20 @@ mod tests {
         sysvar::stake_history::StakeHistory,
     };
     use std::cell::RefCell;
+    use std::str::FromStr;
 
     fn create_default_account() -> RefCell<Account> {
         RefCell::new(Account::default())
     }
 
+    fn invalid_stake_state_pubkey() -> Pubkey {
+        Pubkey::from_str("BadStake11111111111111111111111111111111111").unwrap()
+    }
+
+    fn invalid_vote_state_pubkey() -> Pubkey {
+        Pubkey::from_str("BadVote111111111111111111111111111111111111").unwrap()
+    }
+
     fn process_instruction(instruction: &Instruction) -> Result<(), InstructionError> {
         let accounts: Vec<_> = instruction
             .accounts
@@ -552,6 +561,14 @@ mod tests {
                     config::create_account(0, &config::Config::default())
                 } else if sysvar::rent::check_id(&meta.pubkey) {
                     account::create_account(&Rent::default(), 1)
+                } else if meta.pubkey == invalid_stake_state_pubkey() {
+                    let mut account = Account::default();
+                    account.owner = id();
+                    account
+                } else if meta.pubkey == invalid_vote_state_pubkey() {
+                    let mut account = Account::default();
+                    account.owner = solana_vote_program::id();
+                    account
                 } else {
                     Account::default()
                 })
@@ -599,14 +616,18 @@ mod tests {
                     &Pubkey::default(),
                     &Pubkey::default(),
                     100,
-                    &Pubkey::default()
+                    &invalid_stake_state_pubkey(),
                 )[1]
             ),
             Err(InstructionError::InvalidAccountData),
         );
         assert_eq!(
             process_instruction(
-                &merge(&Pubkey::default(), &Pubkey::default(), &Pubkey::default(),)[0]
+                &merge(
+                    &Pubkey::default(),
+                    &invalid_stake_state_pubkey(),
+                    &Pubkey::default(),
+                )[0]
             ),
             Err(InstructionError::InvalidAccountData),
         );
@@ -616,7 +637,7 @@ mod tests {
                     &Pubkey::default(),
                     &Pubkey::default(),
                     100,
-                    &Pubkey::default(),
+                    &invalid_stake_state_pubkey(),
                     &Pubkey::default(),
                     "seed"
                 )[1]
@@ -627,7 +648,7 @@ mod tests {
             process_instruction(&delegate_stake(
                 &Pubkey::default(),
                 &Pubkey::default(),
-                &Pubkey::default()
+                &invalid_vote_state_pubkey(),
             )),
             Err(InstructionError::InvalidAccountData),
         );
@@ -764,12 +785,14 @@ mod tests {
         );
 
         // gets the check non-deserialize-able account in delegate_stake
+        let mut bad_vote_account = create_default_account();
+        bad_vote_account.get_mut().owner = solana_vote_program::id();
         assert_eq!(
             super::process_instruction(
                 &Pubkey::default(),
                 &[
                     KeyedAccount::new(&Pubkey::default(), true, &create_default_account()),
-                    KeyedAccount::new(&Pubkey::default(), false, &create_default_account()),
+                    KeyedAccount::new(&Pubkey::default(), false, &bad_vote_account),
                     KeyedAccount::new(
                         &sysvar::clock::id(),
                         false,

programs/stake/src/stake_state.rs

@@ -821,6 +821,10 @@ impl<'a> StakeAccount for KeyedAccount<'a> {
         config: &Config,
         signers: &HashSet<Pubkey>,
     ) -> Result<(), InstructionError> {
+        if vote_account.owner()? != solana_vote_program::id() {
+            return Err(InstructionError::IncorrectProgramId);
+        }
+
         match self.state()? {
             StakeState::Initialized(meta) => {
                 meta.authorized.check(signers, StakeAuthorize::Staker)?;
@@ -882,6 +886,10 @@ impl<'a> StakeAccount for KeyedAccount<'a> {
         split: &KeyedAccount,
         signers: &HashSet<Pubkey>,
     ) -> Result<(), InstructionError> {
+        if split.owner()? != id() {
+            return Err(InstructionError::IncorrectProgramId);
+        }
+
         if let StakeState::Uninitialized = split.state()? {
             // verify enough account lamports
             if lamports > self.lamports()? {
@@ -981,6 +989,10 @@ impl<'a> StakeAccount for KeyedAccount<'a> {
         stake_history: &StakeHistory,
         signers: &HashSet<Pubkey>,
     ) -> Result<(), InstructionError> {
+        if source_stake.owner()? != id() {
+            return Err(InstructionError::IncorrectProgramId);
+        }
+
         let meta = match self.state()? {
             StakeState::Stake(meta, stake) => {
                 // stake must be fully de-activated
@@ -1480,6 +1492,21 @@ mod tests {
             )
             .is_ok());
 
+        // signed but faked vote account
+        let faked_vote_account = vote_account.clone();
+        faked_vote_account.borrow_mut().owner = solana_sdk::pubkey::new_rand();
+        let faked_vote_keyed_account = KeyedAccount::new(&vote_pubkey, false, &faked_vote_account);
+        assert_eq!(
+            stake_keyed_account.delegate(
+                &faked_vote_keyed_account,
+                &clock,
+                &StakeHistory::default(),
+                &Config::default(),
+                &signers,
+            ),
+            Err(solana_sdk::instruction::InstructionError::IncorrectProgramId)
+        );
+
         // verify that delegate() looks right, compare against hand-rolled
         let stake = StakeState::stake_from(&stake_keyed_account.account.borrow()).unwrap();
         assert_eq!(
@@ -3558,6 +3585,40 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_split_fake_stake_dest() {
+        let stake_pubkey = solana_sdk::pubkey::new_rand();
+        let stake_lamports = 42;
+
+        let split_stake_pubkey = solana_sdk::pubkey::new_rand();
+        let signers = vec![stake_pubkey].into_iter().collect();
+
+        let split_stake_account = Account::new_ref_data_with_space(
+            0,
+            &StakeState::Uninitialized,
+            std::mem::size_of::<StakeState>(),
+            &solana_sdk::pubkey::new_rand(),
+        )
+        .expect("stake_account");
+
+        let split_stake_keyed_account =
+            KeyedAccount::new(&split_stake_pubkey, true, &split_stake_account);
+
+        let stake_account = Account::new_ref_data_with_space(
+            stake_lamports,
+            &StakeState::Stake(Meta::auto(&stake_pubkey), Stake::just_stake(stake_lamports)),
+            std::mem::size_of::<StakeState>(),
+            &id(),
+        )
+        .expect("stake_account");
+        let stake_keyed_account = KeyedAccount::new(&stake_pubkey, true, &stake_account);
+
+        assert_eq!(
+            stake_keyed_account.split(stake_lamports / 2, &split_stake_keyed_account, &signers),
+            Err(InstructionError::IncorrectProgramId),
+        );
+    }
+
     #[test]
     fn test_split_to_account_with_rent_exempt_reserve() {
         let stake_pubkey = solana_sdk::pubkey::new_rand();
@@ -4421,6 +4482,51 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_merge_fake_stake_source() {
+        let stake_pubkey = solana_sdk::pubkey::new_rand();
+        let source_stake_pubkey = solana_sdk::pubkey::new_rand();
+        let authorized_pubkey = solana_sdk::pubkey::new_rand();
+        let stake_lamports = 42;
+
+        let signers = vec![authorized_pubkey].into_iter().collect();
+
+        let stake_account = Account::new_ref_data_with_space(
+            stake_lamports,
+            &StakeState::Stake(
+                Meta::auto(&authorized_pubkey),
+                Stake::just_stake(stake_lamports),
+            ),
+            std::mem::size_of::<StakeState>(),
+            &id(),
+        )
+        .expect("stake_account");
+        let stake_keyed_account = KeyedAccount::new(&stake_pubkey, true, &stake_account);
+
+        let source_stake_account = Account::new_ref_data_with_space(
+            stake_lamports,
+            &StakeState::Stake(
+                Meta::auto(&authorized_pubkey),
+                Stake::just_stake(stake_lamports),
+            ),
+            std::mem::size_of::<StakeState>(),
+            &solana_sdk::pubkey::new_rand(),
+        )
+        .expect("source_stake_account");
+        let source_stake_keyed_account =
+            KeyedAccount::new(&source_stake_pubkey, true, &source_stake_account);
+
+        assert_eq!(
+            stake_keyed_account.merge(
+                &source_stake_keyed_account,
+                &Clock::default(),
+                &StakeHistory::default(),
+                &signers
+            ),
+            Err(InstructionError::IncorrectProgramId)
+        );
+    }
+
     #[test]
     fn test_merge_active_stake() {
         let stake_pubkey = solana_sdk::pubkey::new_rand();