On Fri, May 29, 2020 at 01:32:03AM +0200, Jann Horn wrote:
> On Fri, May 29, 2020 at 1:11 AM Kees Cook wrote:
> > On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> > > * @usage: reference count to manage the object lifetime.
> > > * get/put helpers should be used whe
On Fri, May 29, 2020 at 01:06:59AM -0700, Kees Cook wrote:
> On Fri, May 29, 2020 at 09:56:41AM +0200, Christian Brauner wrote:
> > On Thu, May 28, 2020 at 04:11:00PM -0700, Kees Cook wrote:
> > > void seccomp_filter_release(const struct task_struct *tsk)
> > > {
> > > struct seccomp_filter *orig
On Fri, May 29, 2020 at 09:56:41AM +0200, Christian Brauner wrote:
> On Thu, May 28, 2020 at 04:11:00PM -0700, Kees Cook wrote:
> > void seccomp_filter_release(const struct task_struct *tsk)
> > {
> > struct seccomp_filter *orig = READ_ONCE(tsk->seccomp.filter);
> >
> > smp_store_release(&
On Fri, May 29, 2020 at 09:47:44AM +0200, Christian Brauner wrote:
> Well the correct way would probably be:
> "usage" -> "refs"
> "live" -> "users"
Yeah, I like it! :)
> So we'd need a first patch to convert "usage" to "refs" and then
> introduce "users".
Yup, sounds right.
> > signal_struct
On Fri, May 29, 2020 at 12:56:50AM -0700, Kees Cook wrote:
> On Fri, May 29, 2020 at 09:51:37AM +0200, Christian Brauner wrote:
> > Aside from this being not an issue now, can we please not dump seccomp
> > filter contents in proc. That sounds terrible and what's the rationale,
> > libseccomp alrea
On Thu, May 28, 2020 at 04:11:00PM -0700, Kees Cook wrote:
> On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> > * @usage: reference count to manage the object lifetime.
> > * get/put helpers should be used when accessing an instance
> > * outside of a lifet
On Fri, May 29, 2020 at 09:51:37AM +0200, Christian Brauner wrote:
> Aside from this being not an issue now, can we please not dump seccomp
> filter contents in proc. That sounds terrible and what's the rationale,
> libseccomp already let's you dump filter contents while loading and you
> could ptr
On Fri, May 29, 2020 at 01:32:03AM +0200, Jann Horn wrote:
> On Fri, May 29, 2020 at 1:11 AM Kees Cook wrote:
> > On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> > > * @usage: reference count to manage the object lifetime.
> > > * get/put helpers should be used whe
On Thu, May 28, 2020 at 04:11:00PM -0700, Kees Cook wrote:
> On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> > * @usage: reference count to manage the object lifetime.
> > * get/put helpers should be used when accessing an instance
> > * outside of a lifet
On Fri, May 29, 2020 at 01:32:03AM +0200, Jann Horn wrote:
> On Fri, May 29, 2020 at 1:11 AM Kees Cook wrote:
> > So, is it safe to detach the filter in release_task()? Has dethreading
> > happened yet? i.e. can we race TSYNC? -- is there a possible
> > inc-from-zero?
>
> release_task -> __exit_s
On Fri, May 29, 2020 at 1:11 AM Kees Cook wrote:
> On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> > * @usage: reference count to manage the object lifetime.
> > * get/put helpers should be used when accessing an instance
> > * outside of a lifetime-guard
On Thu, May 28, 2020 at 05:14:11PM +0200, Christian Brauner wrote:
> * @usage: reference count to manage the object lifetime.
> * get/put helpers should be used when accessing an instance
> * outside of a lifetime-guarded section. In general, this
> * is only needed
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