gaspersic/solana
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Check for physical region overlap (#23568)

Browse Source
This commit is contained in:
Jack May
2022-03-10 11:48:09 -08:00
committed by GitHub
parent 7b238b3645
commit ead8cc4366
2 changed files with 31 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
programs/bpf_loader/src/syscalls.rs
View File

@ -23,10 +23,11 @@ use {
entrypoint::{BPF_ALIGN_OF_U128, MAX_PERMITTED_DATA_INCREASE, SUCCESS},
feature_set::{
self, add_get_processed_sibling_instruction_syscall, blake3_syscall_enabled,
disable_fees_sysvar, do_support_realloc, fixed_memcpy_nonoverlapping_check,
libsecp256k1_0_5_upgrade_enabled, prevent_calling_precompiles_as_programs,
return_data_syscall_enabled, secp256k1_recover_syscall_enabled,
sol_log_data_syscall_enabled, syscall_saturated_math, update_syscall_base_costs,
check_physical_overlapping, disable_fees_sysvar, do_support_realloc,
fixed_memcpy_nonoverlapping_check, libsecp256k1_0_5_upgrade_enabled,
prevent_calling_precompiles_as_programs, return_data_syscall_enabled,
secp256k1_recover_syscall_enabled, sol_log_data_syscall_enabled,
syscall_saturated_math, update_syscall_base_costs,
},
hash::{Hasher, HASH_BYTES},
instruction::{
@ -1431,6 +1432,9 @@ impl<'a, 'b> SyscallObject<BpfError> for SyscallMemcpy<'a, 'b> {
let use_fixed_nonoverlapping_check = invoke_context
.feature_set
.is_active(&fixed_memcpy_nonoverlapping_check::id());
let do_check_physical_overlapping = invoke_context
.feature_set
.is_active(&check_physical_overlapping::id());
#[allow(clippy::collapsible_else_if)]
if use_fixed_nonoverlapping_check {
@ -1451,16 +1455,26 @@ impl<'a, 'b> SyscallObject<BpfError> for SyscallMemcpy<'a, 'b> {
};
let loader_id = &question_mark!(get_current_loader_key(&invoke_context), result);
let dst = question_mark!(
let dst_ptr = question_mark!(
translate_slice_mut::<u8>(memory_mapping, dst_addr, n, loader_id),
result
);
let src = question_mark!(
)
.as_mut_ptr();
let src_ptr = question_mark!(
translate_slice::<u8>(memory_mapping, src_addr, n, loader_id),
result
);
unsafe {
std::ptr::copy_nonoverlapping(src.as_ptr(), dst.as_mut_ptr(), n as usize);
)
.as_ptr();
if do_check_physical_overlapping
&& !is_nonoverlapping(src_ptr as usize, dst_ptr as usize, n as usize)
{
unsafe {
std::ptr::copy(src_ptr, dst_ptr, n as usize);
}
} else {
unsafe {
std::ptr::copy_nonoverlapping(src_ptr, dst_ptr, n as usize);
}
}
*result = Ok(0);
}