diff options
Diffstat (limited to 'kernel/ptrace.c')
| -rw-r--r-- | kernel/ptrace.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 64191fa..0692ab5 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -188,7 +188,7 @@ int ptrace_attach(struct task_struct *task) /* Protect exec's credential calculations against our interference; * SUID, SGID and LSM creds get determined differently under ptrace. */ - retval = mutex_lock_interruptible(¤t->cred_exec_mutex); + retval = mutex_lock_interruptible(&task->cred_exec_mutex); if (retval < 0) goto out; @@ -232,7 +232,7 @@ repeat: bad: write_unlock_irqrestore(&tasklist_lock, flags); task_unlock(task); - mutex_unlock(¤t->cred_exec_mutex); + mutex_unlock(&task->cred_exec_mutex); out: return retval; } @@ -604,10 +604,11 @@ repeat: ret = security_ptrace_traceme(current->parent); /* - * Set the ptrace bit in the process ptrace flags. - * Then link us on our parent's ptraced list. + * Check PF_EXITING to ensure ->real_parent has not passed + * exit_ptrace(). Otherwise we don't report the error but + * pretend ->real_parent untraces us right after return. */ - if (!ret) { + if (!ret && !(current->real_parent->flags & PF_EXITING)) { current->ptrace |= PT_PTRACED; __ptrace_link(current, current->real_parent); } |