Re: [PATCH 0/5] perf: Fix tracepoint events permissions check

From: Jiri Olsa
Date: Fri Jul 11 2014 - 08:02:59 EST


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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/