59fff4b86b
Round 15 review follow-ups on the Studio code-exec sandbox classifier and runtime guard:
- Resolve single-assignment aliases for shutil.copy* and subprocess exec read
sinks (c = shutil.copy; c('../../etc/passwd', ...); r = subprocess.run; r([...]))
so the traversal / sensitive-path check fires on the aliased callee.
- Block gc.get_referents / get_referrers / get_objects (and from-import aliases):
they walk the object graph to a guarded wrapper's closure cell to recover the
original unguarded open / os.* callable.
- Cap list / tuple concatenation during constant folding so a doubling chain
(a + a + a + ...) cannot materialize an oversized sequence in the parent process
before the child rlimits apply.
- Add a runtime sensitive-read backstop in the child prelude: deny a read whose
realpath resolves to a known host secret (SSH / cloud / kube / netrc / HF-token /
/etc/passwd family / /proc) outside the workdir. This covers opaque read paths the
static scanner cannot fold (open(globals()['x'])) and pre-existing in-workdir
symlinks to secrets, while leaving benign outside reads and library imports intact.
- Fail closed on relative multi-component shell redirect targets (echo x > sub/out.txt)
whose subdirectory component could be a symlink traversing outside the workdir; a
bare single-component target stays allowed.
Adds TestRound15Bypasses and runtime backstop tests; full sandbox suite green.
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| .. | ||
| assets | ||
| auth | ||
| core | ||
| hub | ||
| loggers | ||
| models | ||
| plugins | ||
| requirements | ||
| routes | ||
| state | ||
| storage | ||
| tests | ||
| utils | ||
| __init__.py | ||
| _platform_compat.py | ||
| cloudflare_tunnel.py | ||
| colab.py | ||
| main.py | ||
| run.py | ||
| startup_banner.py | ||