Add program id spoof tests (#13866)

programs/bpf/rust/spoof1/src/lib.rs

@@ -0,0 +1,54 @@
+use solana_program::{
+    account_info::AccountInfo,
+    entrypoint,
+    entrypoint::ProgramResult,
+    info,
+    instruction::{AccountMeta, Instruction},
+    program::invoke,
+    pubkey::Pubkey,
+    system_instruction::SystemInstruction,
+    system_program,
+};
+
+entrypoint!(process_instruction);
+fn process_instruction(
+    _program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    _instruction_data: &[u8],
+) -> ProgramResult {
+    let fake_system = &accounts[1];
+    let target = &accounts[2];
+    let me = &accounts[3];
+
+    let mut tmp_native_owner = [0u8; 32];
+    tmp_native_owner.copy_from_slice(accounts[0].owner.as_ref());
+
+    let owner_addr = accounts[0].owner as *const Pubkey;
+    unsafe {
+        std::ptr::write_volatile(owner_addr as *mut [u8; 32], fake_system.owner.to_bytes());
+    }
+
+    let system = &accounts[0];
+    let mut new_system = system.clone();
+    new_system.data = fake_system.data.clone();
+
+    let account_metas = vec![
+        AccountMeta::new(*target.key, false),
+        AccountMeta::new(*me.key, false),
+    ];
+    let ix = Instruction::new(
+        system_program::id(),
+        &SystemInstruction::Transfer { lamports: 1 },
+        account_metas,
+    );
+
+    info!("swapped owner and data");
+    invoke(&ix, &[target.clone(), me.clone(), new_system])?;
+
+    let owner_addr = accounts[0].owner as *const Pubkey;
+    unsafe {
+        std::ptr::write_volatile(owner_addr as *mut [u8; 32], tmp_native_owner);
+    }
+
+    Ok(())
+}