Files
nezha_domains/service/rpc/mcp_rpc_kill_switch_race_test.go
T
naibaandcloudcode ab25662ddd feat(auth): add PAT auth, scoped REST/MCP access, CSRF, and tenant isolation
Introduce Personal Access Tokens (nzp_*) as a stateless auth path alongside
JWT, gated per-endpoint by a scope middleware (nezha:{resource}:{verb}) with
fail-closed empty-scope defaults and a server-id whitelist. Self-management
endpoints (profile, api-tokens, oauth2 bind, refresh-token) explicitly reject
PATs to block privilege-escalation chains. A revoke registry tears down active
long-lived connections (terminal, fm, ws, transfer, mcp) the moment a PAT is
deleted, with a tombstone closing the revoke->register race.

Add an MCP endpoint that proxies tool calls (exec, fs read/write/delete,
transfer) to agents over gRPC, guarded by origin/DNS-rebinding checks, a
per-token rate limiter, audit logging, and a kill switch. Serialize all
sends through the IOStream wrapper to honour grpc-go's concurrency contract.

Add CSRF double-submit protection on unsafe cookie-authenticated methods,
exempting authenticated PAT requests by context identity (not a forgeable
Authorization header). Apply visibility/whitelist filtering consistently
across list, get-by-id, and mutate paths to enforce tenant isolation.

Migrate legacy mcp:* scopes: rewrite read/exec to nezha:* equivalents and
drop dangerous write/delete/wildcard grants.

Co-authored-by: cloudcode <cloudcode@users.noreply.github.com>
2026-05-30 15:56:44 +00:00

96 lines
3.0 KiB
Go

package rpc
import (
"context"
"errors"
"testing"
"time"
"github.com/nezhahq/nezha/model"
pb "github.com/nezhahq/nezha/proto"
)
// Kill switch must beat a late agent reply. Without the cancelled-flag
// re-check in CallAgent, the following sequence surfaces success after
// EnableMCP=false:
//
// t0 agent puts TaskResult into resultCh (capacity 1, non-blocking)
// t1 admin flips EnableMCP=false → CancelAllMCPInflight closes cancelCh
// t2 CallAgent's select sees BOTH cases ready; Go picks one at random;
// if it picks resultCh, the call returns the agent's payload even
// though the operator's kill switch fired.
//
// The fix is to mark the entry cancelled BEFORE closing cancelCh and have
// the resultCh branch re-check that flag. This test pins the contract by
// driving the worst-case ordering: result is delivered FIRST, then the
// kill switch fires, then CallAgent observes both. With the race in place
// this would flake (random select); with the fix it always returns
// ErrMCPDisabled.
func TestCallAgent_KillSwitchBeatsConcurrentLateResult(t *testing.T) {
const target uint64 = 7301
stream := newFakeStream()
cleanup := installFakeServer(t, target, stream)
defer cleanup()
delivered := make(chan struct{})
go func() {
sent := <-stream.sent
deliverMCPResultFromReporter(&pb.TaskResult{
Id: sent.GetId(),
Type: model.TaskTypeExec,
Successful: true,
Data: `{"exit_code":0,"stdout":"should-not-surface"}`,
}, target)
CancelAllMCPInflight()
close(delivered)
}()
_, err := CallAgent(context.Background(), target, model.TaskTypeExec,
model.ExecRequest{Cmd: "x"}, 2*time.Second)
<-delivered
if !errors.Is(err, ErrMCPDisabled) {
t.Fatalf("kill switch must win the race with a late agent reply; want ErrMCPDisabled, got %v", err)
}
}
// CancelAllMCPInflight must eagerly evict entries so a stale TaskResult
// that arrives after the kill switch cannot still land in resultCh.
// Without the cancelled flag this entry would still be reachable through
// deliverMCPResultFromReporter; the flag guarantees the late delivery is
// silently dropped even if the caller has not returned yet.
func TestCancelAllMCPInflight_LaterResultIsSwallowed(t *testing.T) {
const target uint64 = 7302
stream := newFakeStream()
cleanup := installFakeServer(t, target, stream)
defer cleanup()
taskIDCh := make(chan uint64, 1)
go func() {
sent := <-stream.sent
taskIDCh <- sent.GetId()
}()
resultCh := make(chan error, 1)
go func() {
_, err := CallAgent(context.Background(), target, model.TaskTypeExec,
model.ExecRequest{Cmd: "x"}, 5*time.Second)
resultCh <- err
}()
taskID := <-taskIDCh
CancelAllMCPInflight()
if err := <-resultCh; !errors.Is(err, ErrMCPDisabled) {
t.Fatalf("CallAgent must return ErrMCPDisabled after kill switch; got %v", err)
}
deliverMCPResultFromReporter(&pb.TaskResult{
Id: taskID,
Type: model.TaskTypeExec,
Successful: true,
Data: `{"exit_code":0}`,
}, target)
}