fix(wasip1): fd_renumber panic in the host#11276
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rvolosatovs merged 6 commits intoJul 18, 2025
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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 <rvolosatovs@riseup.net>
Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
Since `remove` is now only used once, remove it. As a sideffect, this makes the implementation more explicit . Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
prtest:full Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
This was referenced Jul 18, 2025
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* fix(wasip1): prevent duplicate FD usage 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 <rvolosatovs@riseup.net> * test(wasip1): expand `fd_renumber` test Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net> * doc: add release notes Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net> * test(wasip1): ignore `fd_renumber` tests when using adapter Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net> * refactor(wasip1): do not modify descriptors on `fd_renumber(n, n)` Since `remove` is now only used once, remove it. As a sideffect, this makes the implementation more explicit . Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net> * doc: reference the CVE prtest:full Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net> --------- Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
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This a security advisory fix PR moved from https://github.com/bytecodealliance/wasmtime-ghsa-fm79-3f68-h2fc/pull/1