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From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Johannes Erdfelt <johannes@erdfelt.com>,
	Jessica Yu <jeyu@kernel.org>, Jiri Kosina <jikos@kernel.org>,
	Miroslav Benes <mbenes@suse.cz>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ingo Molnar <mingo@redhat.com>,
	live-patching@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Oops caused by race between livepatch and ftrace
Date: Tue, 21 May 2019 16:00:14 -0500	[thread overview]
Message-ID: <20190521210014.aoew7p7y3jbl7na4@treble> (raw)
In-Reply-To: <a2075a5b-e048-4a7b-2813-01ed7e75bde8@redhat.com>

On Tue, May 21, 2019 at 03:27:47PM -0400, Joe Lawrence wrote:
> BTW, livepatching folks -- speaking of this window, does it make sense for
> klp_init_object_loaded() to unconditionally frob the module section
> permissions?  Should it only bother iff it's going to apply
> relocations/alternatives/paravirt?

Yeah, technically there shouldn't be a need to do the frobbing unless
there are .klp.rela or .klp.arch sections for the given object.  Though
I'm not sure it really matters all that much since loading a livepatch
is a pretty rare event.

-- 
Josh

      reply	other threads:[~2019-05-21 21:00 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-20 19:49 Johannes Erdfelt
2019-05-20 20:46 ` Joe Lawrence
2019-05-20 21:09   ` Johannes Erdfelt
2019-05-20 21:19     ` Josh Poimboeuf
2019-05-20 21:39       ` Steven Rostedt
2019-05-21 14:16         ` Josh Poimboeuf
2019-05-21 14:42           ` Steven Rostedt
2019-05-21 16:42             ` Josh Poimboeuf
2019-05-21 16:53               ` Steven Rostedt
2019-05-29 11:17                 ` Jiri Kosina
2019-05-29 12:06                   ` Steven Rostedt
2019-05-29 12:30                     ` Josh Poimboeuf
2019-05-22 13:00               ` Josh Poimboeuf
2019-05-29 17:29               ` Jessica Yu
2019-05-29 17:39                 ` Josh Poimboeuf
2019-05-29 18:34                   ` Jessica Yu
2019-05-20 21:48       ` Johannes Erdfelt
2019-05-20 21:19     ` Joe Lawrence
2019-05-21 19:27       ` Joe Lawrence
2019-05-21 21:00         ` Josh Poimboeuf [this message]

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