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libstore: fix old RemoteStore::addToStore serializer

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having the serializer write into `*conn` is not legal because we are
in a sinkToSource that will be drained by the remote we're connected
to. writing into `*conn` directly can break the framing protocol. it
is unlikely this code was ever run: to protocol it caters to is from
2016(!) and thoroughly untested in-tree, and since it's been present
since nix 2.17 and the 1.18 protocol broken here is nix 2.0 we might
safely assume that daemons older than nix 2.1 are no longer used now

see also #325 (though that wants <2.3 gone, this is sadly only <2.1)

Change-Id: I9d674c18f6d802f61c5d85dfd9608587b73e70a5
This commit is contained in:
eldritch horrors 2024-05-18 17:48:27 +02:00
parent 139d31f876
commit 774c56094f
1 changed files with 2 additions and 1 deletions
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3
src/libstore/remote-store.cc
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@ -509,7 +509,8 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
sink
<< exportMagic
<< printStorePath(info.path);
WorkerProto::write(*this, *conn, info.references);
WorkerProto::WriteConn nested { .to = sink, .version = conn->daemonVersion };
WorkerProto::write(*this, nested, info.references);
sink
<< (info.deriver ? printStorePath(*info.deriver) : "")
<< 0 // == no legacy signature