From 28d838cc4dfea980cb6eda0a7409cbf91889ca74 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 9 Nov 2005 11:33:07 -0800 Subject: [PATCH] Fix ptrace self-attach rule Before we did CLONE_THREAD, the way to check whether we were attaching to ourselves was to just check "current == task", but with CLONE_THREAD we should check that the thread group ID matches instead. Signed-off-by: Linus Torvalds --- kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 5b8dd98a230e..b88d4186cd7a 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -155,7 +155,7 @@ int ptrace_attach(struct task_struct *task) retval = -EPERM; if (task->pid <= 1) goto bad; - if (task == current) + if (task->tgid == current->tgid) goto bad; /* the same process cannot be attached many times */ if (task->ptrace & PT_PTRACED) -- GitLab