From 5ab3c4c1e43ebb637551223791db0ea3519986e1 Mon Sep 17 00:00:00 2001 From: Reepca Russelstein Date: Sun, 20 Oct 2024 15:39:02 -0500 Subject: daemon: Sanitize successful build outputs prior to exposing them. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There is currently a window of time between when the build outputs are exposed and when their metadata is canonicalized. * nix/libstore/build.cc (DerivationGoal::registerOutputs): wait until after metadata canonicalization to move successful build outputs to the store. Change-Id: Ia995136f3f965eaf7b0e1d92af964b816f3fb276 Signed-off-by: Ludovic Courtès --- nix/libstore/build.cc | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) (limited to 'nix') diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc index 67ebfe2f14..43a8a37184 100644 --- a/nix/libstore/build.cc +++ b/nix/libstore/build.cc @@ -2369,15 +2369,6 @@ void DerivationGoal::registerOutputs() Path actualPath = path; if (useChroot) { actualPath = chrootRootDir + path; - if (pathExists(actualPath)) { - /* Move output paths from the chroot to the store. */ - if (buildMode == bmRepair) - replaceValidPath(path, actualPath); - else - if (buildMode != bmCheck && rename(actualPath.c_str(), path.c_str()) == -1) - throw SysError(format("moving build output `%1%' from the chroot to the store") % path); - } - if (buildMode != bmCheck) actualPath = path; } else { Path redirected = redirectedOutputs[path]; if (buildMode == bmRepair @@ -2463,6 +2454,20 @@ void DerivationGoal::registerOutputs() canonicalisePathMetaData(actualPath, buildUser.enabled() && !rewritten ? buildUser.getUID() : -1, inodesSeen); + if (useChroot) { + if (pathExists(actualPath)) { + /* Now that output paths have been canonicalized (in particular + there are no setuid files left), move them outside of the + chroot and to the store. */ + if (buildMode == bmRepair) + replaceValidPath(path, actualPath); + else + if (buildMode != bmCheck && rename(actualPath.c_str(), path.c_str()) == -1) + throw SysError(format("moving build output `%1%' from the chroot to the store") % path); + } + if (buildMode != bmCheck) actualPath = path; + } + /* For this output path, find the references to other paths contained in it. Compute the SHA-256 NAR hash at the same time. The hash is stored in the database so that we can -- cgit v1.2.3