On Mon, Jun 20, 2022 at 6:44 PM Uladzislau Rezki <urezki@xxxxxxxxx> wrote: > > > > > > > > Is it easy to reproduce? If so could you please describe the steps? As i see > > > the freeing of the "vb" is RCU safe whereas vb->va is not. But from the first > > > glance i do not see how it can accessed twice. Hm.. > > It was raised from a monkey test on A13_k515 system and got 1/20 pcs > > failed. IMO, vb->va which out of vmap_purge_lock protection could race > > with a concurrent ra freeing within __purge_vmap_area_lazy. > > > Do you have exact steps how you run "monkey" test? There are about 30+ kos inserted during startup which could be a specific criteria for reproduction. Do you have doubts about the test result or the solution? > > -- > Uladzislau Rezki
