From: Oleg Nesterov <oleg@redhat.com>
To: Tejun Heo <tj@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: vda.linux@googlemail.com, jan.kratochvil@redhat.com,
pedro@codesourcery.com, indan@nul.nu, bdonlan@gmail.com,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/1] ptrace: fix ptrace_signal() && STOP_DEQUEUED interaction
Date: Thu, 7 Jul 2011 21:03:01 +0200 [thread overview]
Message-ID: <20110707190301.GA25332@redhat.com> (raw)
Another very annoying and ancient problem which needs the fix,
and any fix obviously adds the subtle user-visible changes.
In short, in general it is simply impossible to know whether
PTRACE_CONT(SIGSTOP) will stop the tracee or not.
ee77f075 "signal: Turn SIGNAL_STOP_DEQUEUED into GROUP_STOP_DEQUEUED"
makes the things better, at least STOP_DEQUEUED can't be set/cleared
by another thread, but still without this patch the behavior is not
clearly defined.
Oleg.
next reply other threads:[~2011-07-07 19:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-07 19:03 Oleg Nesterov [this message]
2011-07-07 19:03 ` [PATCH 1/1] ptrace: fix ptrace_signal() && STOP_DEQUEUED interaction Oleg Nesterov
2011-07-13 10:04 ` Tejun Heo
2011-07-13 18:33 ` Oleg Nesterov
2011-07-14 6:45 ` Tejun Heo
2011-07-14 19:12 ` Oleg Nesterov
2011-07-17 19:03 ` Oleg Nesterov
2011-07-20 16:44 ` Tejun Heo
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