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programs: sandbox sane-scripts.private-do

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Colin 2024-02-25 05:29:28 +00:00
parent dd00a2fe6e
commit 6865331b48
1 changed files with 15 additions and 8 deletions
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23
hosts/common/programs/sane-scripts.nix
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@ -121,14 +121,21 @@ in
net = "all";
};
# TODO: gocryptfs/fuse requires /run/wrappers/bin/fusermount3 SUID
# "sane-scripts.private-unlock".sandbox = {
# method = "landlock";
# wrapperType = "wrappedDerivation";
# extraHomePaths = [ "private" ];
# # TODO: don't hardcode the username here.
# extraPaths = [ "/nix/persist/home/colin/private" ];
# };
"sane-scripts.private-do".sandbox = {
# because `mount` is a cap_sys_admin syscall, there's no great way to mount stuff dynamically like this.
# instead, we put ourselves in a mount namespace, do the mount, and drop into a shell or run a command.
# this actually has an OK side effect, that the mount isn't shared, and so we avoid contention/interleaving that would cause the ending `umount` to fail.
method = "bwrap";
wrapperType = "wrappedDerivation";
# cap_sys_admin is needed to mount stuff.
# ordinarily /run/wrappers/bin/mount would do that via setuid, but sandboxes have no_new_privs by default.
capabilities = [ "sys_admin" ];
# `sane-private-do` acts as a launcher, so give it access to anything it could possibly need.
# (crucially, that includes the backing store)
extraPaths = [ "/" ];
};
"sane-scripts.private-lock".sandbox.enable = false;
"sane-scripts.private-unlock".sandbox.enable = false;
"sane-scripts.reclaim-boot-space".sandbox = {
method = "bwrap";