Messages in this thread | | | Date | Wed, 9 Jun 2021 11:12:22 -0700 | From | Kees Cook <> | Subject | Re: [BUG] I found a bug when try to enable record_ftrace |
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On Tue, Jun 08, 2021 at 03:16:44PM -0400, Joel Fernandes wrote: > On Wed, Jun 02, 2021 at 10:43:29AM -0700, Kees Cook wrote: > > > > On Wed, Jun 02, 2021 at 03:42:23PM +0800, Zhengyejian (Zetta) wrote: > > > Hello, > > > > > > There may be a deadlock caused by ftrace recursion when try to enable > > > record_ftrace. > > > > Hi, > > > > Thanks for the report. Joel, is this something you can take a look at? > > Kees, > > Sorry for late reply. Right now I am dealing with a production-stop bug and > would not likely get time. Plus I feel a bit less motivated, because the > ftrace in pstore the way it stands now is unusable due to perf issues anyway > (I wonder if anyone uses it at all now). I would rather someone who has time > to work on this try to revive: https://lkml.org/lkml/2020/9/2/1075 . Should > we just delete pstore function tracing till then?
If no one is using it, then yes, let's rip it out. Zetta, are you using pstore ftrace?
-Kees
-- Kees Cook
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