diff options
Diffstat (limited to 'pkg/sentry/platform/ptrace')
| -rw-r--r-- | pkg/sentry/platform/ptrace/subprocess_linux.go | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/pkg/sentry/platform/ptrace/subprocess_linux.go b/pkg/sentry/platform/ptrace/subprocess_linux.go index 25b8e8cb7..e2aab8135 100644 --- a/pkg/sentry/platform/ptrace/subprocess_linux.go +++ b/pkg/sentry/platform/ptrace/subprocess_linux.go @@ -38,7 +38,7 @@ const syscallEvent syscall.Signal = 0x80 // Precondition: the runtime OS thread must be locked. func probeSeccomp() bool { // Create a completely new, destroyable process. - t, err := attachedThread(0, uint32(linux.SECCOMP_RET_ERRNO)) + t, err := attachedThread(0, linux.SECCOMP_RET_ERRNO) if err != nil { panic(fmt.Sprintf("seccomp probe failed: %v", err)) } @@ -112,14 +112,14 @@ func createStub() (*thread, error) { // ptrace emulation check. This simplifies using SYSEMU, since seccomp // will never run for emulation. Seccomp will only run for injected // system calls, and thus we can use RET_KILL as our violation action. - var defaultAction uint32 + var defaultAction linux.BPFAction if probeSeccomp() { log.Infof("Latest seccomp behavior found (kernel >= 4.8 likely)") - defaultAction = uint32(linux.SECCOMP_RET_KILL_THREAD) + defaultAction = linux.SECCOMP_RET_KILL_THREAD } else { // We must rely on SYSEMU behavior; tracing with SYSEMU is broken. log.Infof("Legacy seccomp behavior found (kernel < 4.8 likely)") - defaultAction = uint32(linux.SECCOMP_RET_ALLOW) + defaultAction = linux.SECCOMP_RET_ALLOW } // When creating the new child process, we specify SIGKILL as the @@ -135,7 +135,7 @@ func createStub() (*thread, error) { // attachedThread returns a new attached thread. // // Precondition: the runtime OS thread must be locked. -func attachedThread(flags uintptr, defaultAction uint32) (*thread, error) { +func attachedThread(flags uintptr, defaultAction linux.BPFAction) (*thread, error) { // Create a BPF program that allows only the system calls needed by the // stub and all its children. This is used to create child stubs // (below), so we must include the ability to fork, but otherwise lock @@ -148,11 +148,11 @@ func attachedThread(flags uintptr, defaultAction uint32) (*thread, error) { syscall.SYS_TIME: {}, 309: {}, // SYS_GETCPU. }, - Action: uint32(linux.SECCOMP_RET_TRAP), + Action: linux.SECCOMP_RET_TRAP, Vsyscall: true, }, } - if defaultAction != uint32(linux.SECCOMP_RET_ALLOW) { + if defaultAction != linux.SECCOMP_RET_ALLOW { rules = append(rules, seccomp.RuleSet{ Rules: seccomp.SyscallRules{ syscall.SYS_CLONE: []seccomp.Rule{ @@ -191,7 +191,7 @@ func attachedThread(flags uintptr, defaultAction uint32) (*thread, error) { syscall.SYS_MMAP: {}, syscall.SYS_MUNMAP: {}, }, - Action: uint32(linux.SECCOMP_RET_ALLOW), + Action: linux.SECCOMP_RET_ALLOW, }) } instrs, err := seccomp.BuildProgram(rules, defaultAction) |