Re: [PATCH] io_uring/rsrc: require cloned buffers to share accounting contexts

On Tue, 14 Jan 2025 18:49:00 +0100, Jann Horn wrote:

When IORING_REGISTER_CLONE_BUFFERS is used to clone buffers from uring instance A to uring instance B, where A and B use different MMs for accounting, the accounting can go wrong: If uring instance A is closed before uring instance B, the pinned memory counters for uring instance B will be decremented, even though the pinned memory was originally accounted through uring instance A; so the MM of uring instance B can end up with negative locked memory.

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Applied, thanks!

[1/1] io_uring/rsrc: require cloned buffers to share accounting contexts commit: 19d340a2988d4f3e673cded9dde405d727d7e248

Best regards,