From: Jiri Olsa <jolsa@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Alexander Yarygin <yarygin@linux.vnet.ibm.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>, Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH 0/5] perf: Fix tracepoint events permissions check
Date: Fri, 11 Jul 2014 14:02:39 +0200 [thread overview]
Message-ID: <20140711120238.GD21557@krava.redhat.com> (raw)
In-Reply-To: <1405079782-8139-1-git-send-email-jolsa@kernel.org>
On Fri, Jul 11, 2014 at 01:56:17PM +0200, Jiri Olsa wrote:
> hi,
> sending fix for bug reported by Alexander Yarygin in here:
> http://marc.info/?l=linux-kernel&m=140475133707722&w=2
>
> The main problem was, that the event_init tracepoint callback
> checked permission of the 'current' task instead of the event
> owner task.
>
> While this is ok for perf_event_open syscall check, it is wrong
> once event_init is called during fork to create child events.
> In this case the permission of the forked task is checked instead
> of the owner task of the parent event.
also available in here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/core_perm
jirka
next prev parent reply other threads:[~2014-07-11 12:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-11 11:56 [PATCH 0/5] perf: Fix tracepoint events permissions check Jiri Olsa
2014-07-11 11:56 ` [PATCH 1/5] perf: Make perf_init_event function static Jiri Olsa
2014-07-11 11:56 ` [PATCH 2/5] perf: Destroy event's children on task exit Jiri Olsa
2014-07-11 13:23 ` Peter Zijlstra
2014-07-11 13:31 ` Jiri Olsa
2014-07-16 12:20 ` Ingo Molnar
2014-07-14 11:18 ` Peter Zijlstra
2014-07-14 11:43 ` Jiri Olsa
2014-07-14 13:02 ` Peter Zijlstra
2014-07-14 13:22 ` Jiri Olsa
2014-07-14 13:35 ` Peter Zijlstra
2014-07-14 14:21 ` Jiri Olsa
2014-07-16 12:14 ` Jiri Olsa
2014-07-14 20:18 ` Jiri Olsa
2014-07-15 9:11 ` Peter Zijlstra
2014-07-15 9:31 ` Jiri Olsa
2014-07-11 11:56 ` [PATCH 3/5] perf: Initialize owner before calling event_init callback Jiri Olsa
2014-07-11 11:56 ` [PATCH 4/5] perf: Move event owner retrieval into perf_event_get_owner Jiri Olsa
2014-07-11 11:56 ` [PATCH 5/5] perf: Check event's owner permission in tracepoint init callback Jiri Olsa
2014-07-11 12:02 ` Jiri Olsa [this message]
2014-07-28 8:28 ` [tip:perf/core] perf: Check permission only for parent tracepoint event tip-bot for Jiri Olsa
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