/** * aa_ptrace - do ptrace permission check and auditing * @tracer: task doing the tracing (NOT NULL) * @tracee: task being traced (NOT NULL) * @mode: ptrace mode either PTRACE_MODE_READ || PTRACE_MODE_ATTACH * * Returns: %0 else error code if permission denied or error */ int aa_ptrace(struct task_struct *tracer, struct task_struct *tracee, unsigned int mode) { /* * tracer can ptrace tracee when * - tracer is unconfined || * - tracer is in complain mode * - tracer has rules allowing it to trace tracee currently this is: * - confined by the same profile || * - tracer profile has CAP_SYS_PTRACE */ struct aa_profile *tracer_p; /* cred released below */ const struct cred *cred = get_task_cred(tracer); int error = 0; tracer_p = aa_cred_profile(cred); if (!unconfined(tracer_p)) { /* lcred released below */ const struct cred *lcred = get_task_cred(tracee); struct aa_profile *tracee_p = aa_cred_profile(lcred); error = aa_may_ptrace(tracer, tracer_p, tracee_p, mode); error = aa_audit_ptrace(tracer_p, tracee_p, error); put_cred(lcred); } put_cred(cred); return error; }
int aa_ptrace(struct task_struct *tracer, struct task_struct *tracee, unsigned int mode) { /* */ struct aa_profile *tracer_p; /* */ const struct cred *cred = get_task_cred(tracer); int error = 0; tracer_p = aa_cred_profile(cred); if (!unconfined(tracer_p)) { /* */ const struct cred *lcred = get_task_cred(tracee); struct aa_profile *tracee_p = aa_cred_profile(lcred); error = aa_may_ptrace(tracer, tracer_p, tracee_p, mode); error = aa_audit_ptrace(tracer_p, tracee_p, error); put_cred(lcred); } put_cred(cred); return error; }