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fix: validate spawn delegation authority

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This commit is contained in:
Hare
2026-06-12 17:10:59 +09:00
parent ee508f707f
commit c04b1ca289
6 changed files with 69 additions and 10 deletions
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crates/pod-registry/src/conflict.rs
+1
View File
@@ -210,6 +210,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
// A different top-level Pod trying to register /src/core/x
crates/pod-registry/src/error.rs
+4 -2
View File
@@ -3,7 +3,7 @@
use std::io;
use std::path::PathBuf;
use manifest::ScopeRule;
use manifest::{ScopeError, ScopeRule};
use session_store::SegmentId;
/// Errors raised by the mutating pod-registry operations.
@@ -20,10 +20,12 @@ pub enum ScopeLockError {
competitor_rule: ScopeRule,
},
#[error(
"requested scope `{}` is not within spawner `{spawner}`'s effective scope",
"requested scope `{}` is not within spawner `{spawner}`'s delegation scope",
.rule.target.display()
)]
NotSubset { spawner: String, rule: ScopeRule },
#[error("invalid delegation scope: {source}")]
InvalidScope { source: ScopeError },
#[error("pod `{0}` is not registered")]
UnknownPod(String),
#[error(
crates/pod-registry/src/mutate.rs
+52 -7
View File
@@ -4,10 +4,10 @@
use std::io;
use std::path::PathBuf;
use manifest::{Permission, ScopeRule};
use manifest::{DelegationScope, Permission, ScopeRule};
use session_store::SegmentId;
use crate::conflict::{find_conflict_owner, find_conflict_owners, is_within_effective_write};
use crate::conflict::{find_conflict_owner, find_conflict_owners};
use crate::error::ScopeLockError;
use crate::table::{Allocation, LockFileGuard};
@@ -106,8 +106,8 @@ pub fn register_pod_with_deny(
}
/// Register a spawned Pod whose scope is delegated from `spawner`.
/// The requested scope must be within `spawner`'s effective write
/// scope; overlap with any Pod other than `spawner` is a conflict.
/// The requested scope must be within the spawner's delegation authority;
/// overlap with any Pod other than `spawner` is a conflict.
pub fn delegate_scope(
guard: &mut LockFileGuard,
spawner: &str,
@@ -115,6 +115,7 @@ pub fn delegate_scope(
pid: u32,
socket: PathBuf,
scope_allow: Vec<ScopeRule>,
delegation_scope: &DelegationScope,
) -> Result<(), ScopeLockError> {
reclaim_stale(guard);
if guard.data().find(&spawned).is_some() {
@@ -124,7 +125,10 @@ pub fn delegate_scope(
return Err(ScopeLockError::UnknownPod(spawner.into()));
}
for rule in &scope_allow {
if !is_within_effective_write(guard.data(), spawner, rule) {
let allowed = delegation_scope
.allows_rule(rule)
.map_err(|source| ScopeLockError::InvalidScope { source })?;
if !allowed {
return Err(ScopeLockError::NotSubset {
spawner: spawner.into(),
rule: rule.clone(),
@@ -363,11 +367,42 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/docs", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap_err();
assert!(matches!(err, ScopeLockError::NotSubset { .. }));
}
#[test]
fn delegate_uses_delegation_scope_not_direct_effective_write() {
let dir = TempDir::new().unwrap();
let path = dir.path().join("pods.json");
let mut g = open_empty(&path);
register_pod(
&mut g,
"orchestrator".into(),
std::process::id(),
sock("orchestrator"),
vec![read_rule("/workspace", true)],
sid(),
)
.unwrap();
delegate_scope(
&mut g,
"orchestrator",
"coder".into(),
std::process::id(),
sock("coder"),
vec![write_rule("/workspace/.worktree/task", true)],
&delegation_scope(vec![write_rule("/workspace", true)]),
)
.unwrap();
let coder = g.data().find("coder").expect("coder allocation");
assert_eq!(coder.delegated_from.as_deref(), Some("orchestrator"));
}
#[test]
fn delegate_succeeds_within_parent_scope() {
let dir = TempDir::new().unwrap();
@@ -389,6 +424,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
assert_eq!(g.data().allocations.len(), 2);
@@ -427,6 +463,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
// Sibling C from A tries to take /src/core/sub — already under B's scope.
@@ -437,10 +474,13 @@ mod tests {
std::process::id(),
sock("c"),
vec![write_rule("/src/core/sub", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap_err();
// NotSubset fires first because /src/core is no longer in A's effective.
assert!(matches!(err, ScopeLockError::NotSubset { .. }));
match err {
ScopeLockError::WriteConflict { competitor, .. } => assert_eq!(competitor, "b"),
other => panic!("expected WriteConflict, got {other:?}"),
}
}
#[test]
@@ -464,6 +504,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
delegate_scope(
@@ -473,6 +514,7 @@ mod tests {
std::process::id(),
sock("d"),
vec![write_rule("/src/core/x", true)],
&delegation_scope(vec![write_rule("/src/core", true)]),
)
.unwrap();
release_pod(&mut g, "b").unwrap();
@@ -571,6 +613,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
delegate_scope(
@@ -580,6 +623,7 @@ mod tests {
std::process::id(),
sock("d"),
vec![write_rule("/src/core/x", true)],
&delegation_scope(vec![write_rule("/src/core", true)]),
)
.unwrap();
// Simulate B crashing by rewriting its pid to one the probe
@@ -670,6 +714,7 @@ mod tests {
std::process::id(),
sock("b"),
vec![write_rule("/src/core", true)],
&delegation_scope(vec![write_rule("/src", true)]),
)
.unwrap();
assert!(!is_within_effective_write(
crates/pod-registry/src/table.rs
+1
View File
@@ -245,6 +245,7 @@ mod tests {
std::process::id(),
sock("child"),
vec![write_rule("/p/sub", true)],
&delegation_scope(vec![write_rule("/p", true)]),
)
.unwrap();
crates/pod-registry/src/test_util.rs
+9 -1
View File
@@ -5,7 +5,7 @@
use std::path::{Path, PathBuf};
use std::sync::{LazyLock, Mutex, MutexGuard};
use manifest::{Permission, ScopeRule};
use manifest::{DelegationScope, Permission, ScopeConfig, ScopeRule};
use session_store::SegmentId;
use crate::table::LockFileGuard;
@@ -88,6 +88,14 @@ pub(crate) fn read_rule(path: &str, recursive: bool) -> ScopeRule {
}
}
pub(crate) fn delegation_scope(rules: Vec<ScopeRule>) -> DelegationScope {
DelegationScope::from_config(&ScopeConfig {
allow: rules,
deny: Vec::new(),
})
.expect("test delegation scope")
}
pub(crate) fn sock(name: &str) -> PathBuf {
PathBuf::from(format!("/tmp/{name}.sock"))
}