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Title: [3.14] gh-143378: Fix use-after-free when BytesIO is concurrently mutated during write operations (GH-143408) by miss-islington · Pull Request #143599 · python/cpython · GitHub

Open Graph Title: [3.14] gh-143378: Fix use-after-free when BytesIO is concurrently mutated during write operations (GH-143408) by miss-islington · Pull Request #143599 · python/cpython

X Title: [3.14] gh-143378: Fix use-after-free when BytesIO is concurrently mutated during write operations (GH-143408) by miss-islington · Pull Request #143599 · python/cpython

Description: PyObject_GetBuffer() can execute user code (e.g. via buffer), which may close or otherwise mutate a BytesIO object while write() or writelines() is in progress. This could invalidate the internal b...

Open Graph Description: PyObject_GetBuffer() can execute user code (e.g. via buffer), which may close or otherwise mutate a BytesIO object while write() or writelines() is in progress. This could invalidate the internal b...

X Description: PyObject_GetBuffer() can execute user code (e.g. via buffer), which may close or otherwise mutate a BytesIO object while write() or writelines() is in progress. This could invalidate the internal b...

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[3.14] gh-143378: Fix use-after-free when BytesIO is concurrently mutated during write operations (GH-143408) https://github.com/python/cpython/pull/143599#top
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