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[33.0.2] backport fd_renumber fixes #11279

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The implementation assumed that only the runtime could ever issue FDs,
however that's not the case in p1, where guests can choose arbitrary
FDs to use (e.g. via `fd_renumber`).

Due to incorrect accounting, guests could "mark" arbitrary FDs as "free"
and trigger a panic in the host by requesting a new FD.

Signed-off-by: Roman Volosatovs <[email protected]>
Since `remove` is now only used once, remove it.

As a sideffect, this makes the implementation more explicit .

Signed-off-by: Roman Volosatovs <[email protected]>
Signed-off-by: Roman Volosatovs <[email protected]>
prtest:full

Signed-off-by: Roman Volosatovs <[email protected]>
prtest:full

Signed-off-by: Roman Volosatovs <[email protected]>
@rvolosatovs rvolosatovs requested review from a team as code owners July 18, 2025 11:59
@rvolosatovs rvolosatovs requested review from dicej and removed request for a team July 18, 2025 11:59
@github-actions github-actions bot added wasi Issues pertaining to WASI wasmtime:docs Issues related to Wasmtime's documentation labels Jul 18, 2025
@rvolosatovs rvolosatovs merged commit e43545e into bytecodealliance:release-33.0.0 Jul 18, 2025
160 checks passed
@rvolosatovs rvolosatovs deleted the backport/33/fd-renumber branch July 18, 2025 17:16
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