diff options
author | Kane York <kanepyork@gmail.com> | 2020-08-05T09·54-0700 |
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committer | kanepyork <rikingcoding@gmail.com> | 2020-08-05T18·29+0000 |
commit | f10d60a4543c39cb42f43159a18c9479e07ec56c (patch) | |
tree | ab022aeab4c3fd40f0dacf747d63838397dcd267 /third_party/nix/src/libstore/download.cc | |
parent | 3f923b2aa0d976fb18e7038d4e2701e878c6784b (diff) |
fix(3p/nix/store): fix race condition in downloader r/1598
In certain circumstances, the decompression thread could race ahead of the downloader thread and process the same chunk twice. Clear the data buffer while the lock is held to prevent this kind of incident. Change-Id: I19a84a0c5768d1228c6c18a7664a7b8893ef96de Reviewed-on: https://cl.tvl.fyi/c/depot/+/1658 Tested-by: BuildkiteCI Reviewed-by: glittershark <grfn@gws.fyi>
Diffstat (limited to 'third_party/nix/src/libstore/download.cc')
-rw-r--r-- | third_party/nix/src/libstore/download.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/third_party/nix/src/libstore/download.cc b/third_party/nix/src/libstore/download.cc index e73181e73109..fdc14b376235 100644 --- a/third_party/nix/src/libstore/download.cc +++ b/third_party/nix/src/libstore/download.cc @@ -835,7 +835,8 @@ void Downloader::download(DownloadRequest&& request, Sink& sink) { state.wait(state->avail); } - chunk = state->data; + chunk = std::move(state->data); + state->data = std::string(); state->request.notify_one(); } |