Hi Salvatore, I try also to reproduce the issue using multiple ways without success. I hope the modification will fix this issue.
Thank you, Regards, Olivier -----Message d'origine----- De : Salvatore Bonaccorso <[email protected]> De la part de Salvatore Bonaccorso Envoyé : lundi 13 décembre 2021 21:34 À : Olivier Monaco <[email protected]>; [email protected] Objet : Re: Bug#988044: linux-image-5.10.0-0.bpo.4-amd64: Kernel panic due nfsd error: refcount_t: addition on 0; use-after-free Hi Olivier, On Mon, Nov 22, 2021 at 09:27:26AM +0000, Olivier Monaco wrote: > Hi Salvatore, > > Sorry for my very very late answer. > > I tried many actions to reproduce and/or fix this problem. We upgraded > our kernel to the lastest backport version for Buster but the issue > was still there. We upgraded to Bullseye at the end of October but > today this issue occurred again. > > I think it related to > https://lore.kernel.org/linux-nfs/yv3vdqopvgxc%[email protected]/ > > I just send an email to this thread. > > Something that may be important: our groups of servers are used to > host websites, some with only one website, some with many. For now, > this issue only occurred on NFS servers part of a group with many > websites. But one of the most loaded NFS server is also used only for > one website and has never had this issue. May be this issue occurs > only when the NFS server is serving many different files. I was never able to reliably reproduce the issue myself, but upstream now thinks to have isolated the issue and should be fixed with: https://git.kernel.org/linus/548ec0805c399c65ed66c6641be467f717833ab5 Fixes are as well queued to stable series. Regards, Salvatore
