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Cap CPI signers (#14021)

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This commit is contained in:
Jack May
2020-12-09 02:14:53 -08:00
committed by GitHub
parent e1872a450a
commit e1a4251b07
5 changed files with 147 additions and 36 deletions
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11
programs/bpf_loader/src/syscalls.rs
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@ -37,6 +37,9 @@ use std::{
};
use thiserror::Error as ThisError;
/// Maximum signers
pub const MAX_SIGNERS: usize = 16;
/// Error definitions
#[derive(Debug, ThisError, PartialEq)]
pub enum SyscallError {
@ -60,6 +63,8 @@ pub enum SyscallError {
PrivilegeEscalation,
#[error("Unaligned pointer")]
UnalignedPointer,
#[error("Too many signers")]
TooManySigners,
}
impl From<SyscallError> for EbpfError<BPFError> {
fn from(error: SyscallError) -> Self {
@ -923,6 +928,9 @@ impl<'a> SyscallInvokeSigned<'a> for SyscallInvokeSignedRust<'a> {
signers_seeds_len,
self.loader_id,
)?;
if signers_seeds.len() > MAX_SIGNERS {
return Err(SyscallError::TooManySigners.into());
}
for signer_seeds in signers_seeds.iter() {
let untranslated_seeds = translate_slice::<&[u8]>(
memory_mapping,
@ -1178,6 +1186,9 @@ impl<'a> SyscallInvokeSigned<'a> for SyscallInvokeSignedC<'a> {
signers_seeds_len,
self.loader_id,
)?;
if signers_seeds.len() > MAX_SIGNERS {
return Err(SyscallError::TooManySigners.into());
}
Ok(signers_seeds
.iter()
.map(|signer_seeds| {