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Ysopwnable
4fc6565b0f
* feat(native): inspect offline ELF layout through pwntools * fix(build): prepare offline ELF verification on clean runners * fix(native): preserve snapshot acquisition cancellation * fix(native): handle sectionless ELF and retain decoder diagnostics * test(native): verify malformed symbol table entry sizes * fix(native): respect inherited limits and unused segment fields * fix(native): preserve packed relocations and decoder launch constraints * fix(native): validate symbol spans and preserve resource failures * fix(native): preserve diagnostic completeness and memory failures * fix(native): guard bridge imports against allocation failures * fix(native): validate relocation symbol and section references * fix(native): retain diagnostics through compounded cleanup failures * fix(native): preserve unresolved relocation section references * fix(native): bound linkage evidence and preserve CPU signal diagnostics * fix(native): preserve file-size resource failure evidence * fix(native): retain opaque linkage names and late cancellation output * test(native): make CPU-limit fixture robust across runners * fix(native): verify resource failure branches before interpreting exits * fix(native): validate declared ELF string references * fix(native): validate section-name table before decoding * fix(native): enforce canonical ELF name-table escapes
40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
"""Catch typed resource failures while loading or running the owned ELF adapter.
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Only this package's fixed sibling is executed; caller input stays in request.json.
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Interpreter startup failures before this boundary remain unclassified.
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"""
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import os
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import sys
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def resource_exit(status, marker):
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try:
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if len(sys.argv) > 2:
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descriptor = os.open(sys.argv[1], os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o600)
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os.write(descriptor, marker)
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os.close(descriptor)
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except (OSError, MemoryError):
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# Without a complete marker the parent keeps this failure unclassified.
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pass
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os._exit(status)
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try:
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implementation = os.path.join(os.path.dirname(__file__), "layout_impl.py")
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with open(implementation, "rb") as handle:
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source = handle.read()
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exec(compile(source, implementation, "exec"), {
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"__file__": implementation,
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"__name__": "__main__",
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})
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except MemoryError:
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# Reserved status: an observed allocation failure, including imports/compile.
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resource_exit(75, b"M")
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except OSError as error:
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# Linux ENOMEM is an observed allocation failure, independent of error text.
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if error.errno == 12:
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resource_exit(75, b"M")
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# Linux EFBIG is observed directly, including a partial limits/reply write.
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if error.errno == 27:
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resource_exit(76, b"F")
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raise
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