Messages in this thread | | | From | Marco Elver <> | Date | Tue, 26 Oct 2021 16:39:44 +0200 | Subject | Re: [syzbot] KCSAN: data-race in call_rcu / rcu_gp_fqs_loop |
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On Tue, 26 Oct 2021 at 16:33, Paul E. McKenney <paulmck@kernel.org> wrote: > On Tue, Oct 26, 2021 at 07:07:30AM -0700, Paul E. McKenney wrote: > > On Mon, Oct 25, 2021 at 12:31:53PM +0200, Marco Elver wrote: > > > +Cc Paul > > > > > > data race is in rcu code, presumably not yet discovered by rcutorture? > > > > Quite possibly, and I will take a look. Thank you for sending this > > along. > > And this is (allegedly) fixed by commit 2431774f04d10 ("rcu: Mark accesses > to rcu_state.n_force_qs"), which is in -rcu and slated for the upcoming > merge window. But yes, still a bug in mainline.
Thanks for confirming, then the latest incarnation of it must then be a dup, and I'll mark it fixed:
#syz fix: rcu: Mark accesses to rcu_state.n_force_qs
Apologies I missed there was a previous report and your fix.
Thanks, -- Marco
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