direct mapping: harden, fix memory permission handling#32649

Merged

alessandrod merged 12 commits intosolana-labs:masterfrom alessandrod:cpi-perms-fixes

Aug 30, 2023

+797-266

Commits on Aug 30, 2023

transaction_context: update make_data_mut comment
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bpf_loader: cpi: pass SerializeAccountMetadata to CallerAccount::from*
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bpf_loader: direct_mapping: enforce account info pointers to be immutable
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bpf_loader: cpi: access ref_to_len_in_vm through VmValue
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direct mapping: improve memory permission tracking across CPI calls
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bpf_loader: serialization: address review comment don't return vm_addr from push_account_region
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bpf_loader: rename push_account_region to push_account_data_region
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cpi: fix slow edge case zeroing extra account capacity after shrinking an account
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bpf_loader: add account_data_region_memory_state helper
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cpi: direct_mapping: error out if ref_to_len_in_vm points to account memory
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bpf_loader: direct_mapping: map AccessViolation -> InstructionError
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bpf_loader: cpi: remove unnecessary infallible slice::get call
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