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Groups > linux.debian.kernel > #90108

Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2

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From "Tyler W. Ross" <TWR@tylerwross.com>
Newsgroups linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2
Date Mon, 17 Nov 2025 19:50:02 +0100
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References <LQqSZ-cvae-3@gated-at.bofh.it> <LQTLj-cP9F-1@gated-at.bofh.it> <LQUo1-cPF1-3@gated-at.bofh.it> <LRz7P-dhgS-3@gated-at.bofh.it> <LRz7P-dhgS-1@gated-at.bofh.it> <LRPFD-ds93-3@gated-at.bofh.it> <LRPFD-ds93-1@gated-at.bofh.it> <LRZYl-dz0H-1@gated-at.bofh.it> <LScsy-dH2y-9@gated-at.bofh.it> <LQqSZ-cvae-3@gated-at.bofh.it> <LScsy-dH2y-9@gated-at.bofh.it>
X-Original-To Chuck Lever <chuck.lever@oracle.com>
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X-Original-Cc Trond Myklebust <trondmy@kernel.org>, Anna Schumaker <anna@kernel.org>, Salvatore Bonaccorso <carnil@debian.org>, "1120598@bugs.debian.org" <1120598@bugs.debian.org>, Jeff Layton <jlayton@kernel.org>, NeilBrown <neil@brown.name>, Scott Mayhew <smayhew@redhat.com>, Steve Dickson <steved@redhat.com>, Olga Kornievskaia <okorniev@redhat.com>, Dai Ngo <Dai.Ngo@oracle.com>, Tom Talpey <tom@talpey.com>, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org
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Xref csiph.com linux.debian.bugs.dist:1270538 linux.kernel:1743496 linux.debian.kernel:90108

Cross-posted to 3 groups.

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On Monday, November 17th, 2025 at 6:41 AM, Chuck Lever <chuck.lever@oracle.com> wrote:

> > Is this gssd mishandling some setup/initialization?
> > Or is there a miscalculation happening somewhere further up?
> 
> Does Debian's user space Kerberos support the sha2 enctypes?

Appears to. MIT Kerberos docs list sha2 enctypes support on releases
>=1.15 . Debian 13 and Fedora 43 are both shipping 1.21.3 . Debian
unstable currently has 1.22.1 . I haven't had any issues managing
sha2 keytabs, tickets, etc. with the userspace tools. And at least some
NFS operations other than READDIR do seem to work, though I haven't
tested that beyond observing cat, stat, and touch are functional.


TWR

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Bug#1120598: nfs-common: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <twr+debbugs@tylerwross.com> - 2025-11-12 22:50 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Salvatore Bonaccorso <carnil@debian.org> - 2025-11-13 06:10 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-13 18:20 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-13 19:10 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-13 20:00 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-14 05:40 +0100
    Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-14 06:20 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-16 01:50 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Trond Myklebust <trondmy@kernel.org> - 2025-11-16 19:30 +0100
    Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-17 06:30 +0100
      Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Scott Mayhew <smayhew@redhat.com> - 2025-11-18 00:10 +0100
    Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Scott Mayhew <smayhew@redhat.com> - 2025-11-18 00:10 +0100
      Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-18 05:20 +0100
        Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Scott Mayhew <smayhew@redhat.com> - 2025-11-18 19:00 +0100
          Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-19 00:50 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-17 19:50 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-18 05:40 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 Scott Mayhew <smayhew@redhat.com> - 2025-11-19 14:40 +0100
  Bug#1120598: ls input/output error ("NFS: readdir(/) returns -5") on krb5 NFSv4 client using SHA2 "Tyler W. Ross" <TWR@tylerwross.com> - 2025-11-19 18:30 +0100
  Bug#1120598: marked as done (nfs: ls input/output error ("NFS:  readdir(/) returns -5") on krb5 NFSv4 client using SHA2) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-03-09 22:10 +0100

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