From: Peter Zijlstra <peterz@infradead.org>
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>, Ingo Molnar <mingo@elte.hu>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Anton Arapov <anton@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] uprobes: install_breakpoint() should fail if is_swbp_insn() == T
Date: Thu, 31 May 2012 14:15:18 +0200 [thread overview]
Message-ID: <1338466518.28384.57.camel@twins> (raw)
In-Reply-To: <1338400142.28384.12.camel@twins>
On Wed, 2012-05-30 at 19:49 +0200, Peter Zijlstra wrote:
>
> Oh, indeed. I overlooked copy_insn() is taking the page from the
> page-cache instead of the page-tables and will thus get the original.
>
Related to this, what happens when we try to install a probe on a page
that's already been COWed by a ptrace user?
Say gdb did a code modification at or near the intended probe site.
next prev parent reply other threads:[~2012-05-31 12:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-30 16:57 [PATCH 0/3] uprobes: misc minor changes Oleg Nesterov
2012-05-30 16:58 ` [PATCH 1/3] uprobes: install_breakpoint() should fail if is_swbp_insn() == T Oleg Nesterov
2012-05-30 17:28 ` Peter Zijlstra
2012-05-30 17:37 ` Srikar Dronamraju
2012-05-30 17:49 ` Peter Zijlstra
2012-05-30 17:54 ` Peter Zijlstra
2012-05-30 18:03 ` Peter Zijlstra
2012-05-30 18:04 ` Srikar Dronamraju
2012-05-30 18:21 ` Peter Zijlstra
2012-05-31 18:53 ` Oleg Nesterov
2012-06-01 15:53 ` Oleg Nesterov
2012-06-01 16:33 ` Srikar Dronamraju
2012-06-01 17:20 ` Oleg Nesterov
2012-06-01 18:31 ` Oleg Nesterov
2012-06-02 18:21 ` Oleg Nesterov
2012-06-01 16:47 ` Srikar Dronamraju
2012-06-01 18:38 ` Oleg Nesterov
2012-05-31 12:15 ` Peter Zijlstra [this message]
2012-05-31 12:54 ` Srikar Dronamraju
2012-05-30 16:58 ` [PATCH 2/3] uprobes: remove the unnecessary initialization in add_utask() Oleg Nesterov
2012-05-30 16:58 ` [PATCH 3/3] uprobes: simplify the usage of uprobe->pending_list Oleg Nesterov
2012-05-30 17:48 ` Srikar Dronamraju
2012-05-30 18:10 ` Oleg Nesterov
2012-05-30 18:23 ` Srikar Dronamraju
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