On Monday, June 8, 2020 12:53:26 PM CDT Hans-Peter Jansen wrote: > Am Montag, 8. Juni 2020, 17:28:53 CEST schrieb Chuck Lever: > > > On Jun 7, 2020, at 1:44 PM, Hans-Peter Jansen wrote: > > > > > > Am Sonntag, 7. Juni 2020, 18:01:55 CEST schrieb Anthony Joseph Messina: > > >> On Sunday, June 7, 2020 10:32:44 AM CDT Hans-Peter Jansen wrote: > > >>> Hi, > > >>> > > >>> after upgrading the kernel from 5.6.11 to 5.6.14, we suffer from > > >>> regular > > >>> crashes of nfsd here: > > >>> > > >>> 2020-06-07T01:32:43.600306+02:00 server rpc.mountd[2664]: > > >>> authenticated > > >>> mount request from 192.168.3.16:303 for /work (/work) > > >>> 2020-06-07T01:32:43.602594+02:00 server rpc.mountd[2664]: > > >>> authenticated > > >>> mount request from 192.168.3.16:304 for /work/vmware (/work) > > >>> 2020-06-07T01:32:43.602971+02:00 server rpc.mountd[2664]: > > >>> authenticated > > >>> mount request from 192.168.3.16:305 for /work/vSphere (/work) > > >>> 2020-06-07T01:32:43.606276+02:00 server kernel: [51901.089211] general > > >>> protection fault, probably for non-canonical address > > >>> 0xb9159d506ba40000: > > >>> 0000 [#1] SMP PTI 2020-06-07T01:32:43.606284+02:00 server kernel: > > >>> [51901.089226] CPU: 1 PID: 3190 Comm: nfsd Tainted: G O > > >>> 5.6.14-lp151.2-default #1 openSUSE Tumbleweed (unreleased) > > >>> 2020-06-07T01:32:43.606286+02:00 server kernel: [51901.089234] > > >>> Hardware > > >>> name: System manufacturer System Product Name/P7F-E, BIOS 0906 > > >> > > >> I see similar issues in Fedora kernels 5.6.14 through 5.6.16 > > >> https://bugzilla.redhat.com/show_bug.cgi?id=1839287 > > >> > > >> On the client I mount /home with sec=krb5p, and /mnt/koji with sec=krb5 > > > > > > Thanks for confirmation. > > > > > > Apart from the hassle with server reboots, this issue has some DOS > > > potential, I'm afraid. > > > > If you have a reproducer (even a partial one) then bisecting between a > > known good kernel and v5.6.14 (or 16) would be helpful. > > I would love to bisect, but this is my primary production machine, that > needs to be up as much as possible. Apart from that, I'm about to leave the > site for a week and been severely time constrained for the next couple of > weeks.. > > Sorry. > > Anthony? Unfortunately, this is also my main workstation and I have no experience building custom kernels. The diff in net/sunrpc between v5.6.13 and v5.6.14 is relatively small, though it may not point to the root issue. I'm typically only able to "follow along" code like this to spot issues, being a nurse, not a kernel programmer. Thank you for your help. -A -- Anthony - https://messinet.com F9B6 560E 68EA 037D 8C3D D1C9 FF31 3BDB D9D8 99B6