Asymmetric Teardown Leaves Peer Writable with Unresolved Writes (duplexpair / native-duplexpair)

[gsmarcil]

Hello,

I am reporting a teardown propagation issue affecting this package.

A public GitHub Security Advisory has been published:
https://github.com/gsmarcil/android-dmabuf-kgsl-lifecycle-research/security/advisories/GHSA-mj4r-gvvv-h9x9

Summary:
Destroying one endpoint of a duplex pair does not propagate to the peer, which remains writable and accepts writes without emitting any error, close event, or write callback resolution.

This can result in silent operation failure and inconsistent application state.

A minimal reproduction and PoC are included in the advisory.

Please let me know if you would like additional details or a proposed fix.

Thanks.