[DOC]: cuda.core 1.1.1 note misstates program cache permissions

Lee la nota de lanzamiento vinculada de cuda-core 1.1.1 y compárala con cuda_core/cuda/core/utils/_program_cache/_file_stream.py. Ejecuta el ejemplo proporcionado de FileStreamProgramCache si es necesario para verificar los permisos indicados. Se considera terminado cuando la nota describe con precisión la raíz de la caché, las entradas, los archivos de las entradas, el directorio tmp, el comportamiento de umask y cualquier compromiso documentado de una caché compartida.

• I confirmed there appear to be no duplicate issues for this bug and that I agree to the Code of Conduct

Is this for new documentation, or an update to existing docs?

Update

Describe the incorrect/future/missing documentation

The cuda.core 1.1.1 release note says the on-disk program cache directory is created with owner-only permissions (0o700), that those permissions are re-asserted on each use, and that this prevents other local users from reading or injecting cached device code regardless of the process umask. Only the tmp/ staging directory is created 0o700. The cache root, entries/ and the shard directories inherit the umask, and no permissions are re-asserted, so a cache created under a permissive umask stays world-writable after a write.

import os, stat, tempfile
from pathlib import Path
from cuda.core.utils import FileStreamProgramCache

os.umask(0o000)
root = Path(tempfile.mkdtemp()) / "pc"
FileStreamProgramCache(path=root)["k"] = b"hello"
for p in (root, root / "entries", root / "tmp"):
    print(p.name, oct(stat.S_IMODE(os.stat(p).st_mode)))

pc 0o777
entries 0o777
tmp 0o700

Expected: the note describes what shipped. Cache entry files are 0o600 and tmp/ is 0o700, so cached device code is not readable by other users, but the cache root and entries/ follow the umask and a pre-existing shared cache directory is used as-is.

cuda_core/cuda/core/utils/_program_cache/_file_stream.py also records the trade-off this leaves (a deliberately shared writable entries/ lets a co-owner replace a cached file). Whether the note should state that as well is your call.

If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

https://nvidia.github.io/cuda-python/cuda-core/latest/release/1.1.1-notes.html