88b7db1ba4
If a build directory is accessible to other users it is possible to smuggle data in and out of build directories. Usually this is only a build purity problem, but in combination with other issues it can be used to break out of a build sandbox. to prevent this we default to using a subdirectory of nixStateDir (which is more restrictive). (cherry picked from pennae Lix commit 55b416f6897fb0d8a9315a530a9b7f0914458ded) (store setting done by roberth)
39 lines
1.0 KiB
Bash
Executable File
39 lines
1.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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source common.sh
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requireSandboxSupport
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[[ $busybox =~ busybox ]] || skipTest "no busybox"
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if ! command -p -v unshare; then skipTest "Need unshare"; fi
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needLocalStore "The test uses --store always so we would just be bypassing the daemon"
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TODO_NixOS
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execUnshare <<EOF
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source common.sh
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# Avoid store dir being inside sandbox build-dir
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unset NIX_STORE_DIR
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setLocalStore () {
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export NIX_REMOTE=\$TEST_ROOT/\$1
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mkdir -p \$NIX_REMOTE
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}
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cmd=(nix-build ./hermetic.nix --arg busybox "$busybox" --arg seed 1 --no-out-link)
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# Fails with default setting
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setLocalStore store1
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expectStderr 1 "\${cmd[@]}" | grepQuiet "setgroups failed"
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# Fails with `require-drop-supplementary-groups`
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setLocalStore store2
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NIX_CONFIG='require-drop-supplementary-groups = true' \
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expectStderr 1 "\${cmd[@]}" | grepQuiet "setgroups failed"
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# Works without `require-drop-supplementary-groups`
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setLocalStore store3
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NIX_CONFIG='require-drop-supplementary-groups = false' \
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"\${cmd[@]}"
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EOF
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