diff options
| -rw-r--r-- | sys/kern/sys_process.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c index 588b43c606fe..85be385f3669 100644 --- a/sys/kern/sys_process.c +++ b/sys/kern/sys_process.c @@ -744,7 +744,18 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data) */ switch (req) { case PT_TRACE_ME: - /* Always legal. */ + /* + * Always legal, when there is a parent process which + * could trace us. Otherwise, reject. + */ + if ((p->p_flag & P_TRACED) != 0) { + error = EBUSY; + goto fail; + } + if (p->p_pptr == initproc) { + error = EPERM; + goto fail; + } break; case PT_ATTACH: |