Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available

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From	Tj <tj.iam.tj@proton.me>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available
Date	Tue, 24 Feb 2026 14:00:02 +0100
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Follow-up with results of adding dump_stack() to nfsd_permission() 
revealing the paths that trigger the issue.

[  133.185579] Call Trace:
[  133.185580]  <TASK>
[  133.185580]  dump_stack_lvl+0x64/0x80
[  133.185582]  nfsd_permission+0x20/0x100 [nfsd]
[  133.185612]  nfsd_access+0xc8/0x140 [nfsd]
[  133.185639]  nfsd4_proc_compound+0x350/0x670 [nfsd]
[  133.185670]  nfsd_dispatch+0x100/0x220 [nfsd]
[  133.185698]  svc_process_common+0x314/0x700 [sunrpc]
[  133.185733]  ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
[  133.185762]  svc_process+0x131/0x1c0 [sunrpc]
[  133.185795]  svc_recv+0x80a/0x9e0 [sunrpc]
[  133.185827]  ? __pfx_nfsd+0x10/0x10 [nfsd]
[  133.185856]  nfsd+0xa3/0x100 [nfsd]
[  133.185882]  kthread+0xd2/0x100
[  133.185884]  ? __pfx_kthread+0x10/0x10
[  133.185885]  ret_from_fork+0x34/0x50
[  133.185886]  ? __pfx_kthread+0x10/0x10
[  133.185887]  ret_from_fork_asm+0x1a/0x30
[  133.185890]  </TASK>

[  144.020165] Call Trace:
[  144.020165]  <TASK>
[  144.020166]  dump_stack_lvl+0x64/0x80
[  144.020168]  nfsd_permission+0x20/0x100 [nfsd]
[  144.020201]  nfsd_access+0xc8/0x140 [nfsd]
[  144.020228]  nfsd3_proc_access+0x6c/0x110 [nfsd]
[  144.020257]  nfsd_dispatch+0x100/0x220 [nfsd]
[  144.020286]  svc_process_common+0x314/0x700 [sunrpc]
[  144.020321]  ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd]
[  144.020350]  svc_process+0x131/0x1c0 [sunrpc]
[  144.020383]  svc_recv+0x80a/0x9e0 [sunrpc]
[  144.020415]  ? __pfx_nfsd+0x10/0x10 [nfsd]
[  144.020445]  nfsd+0xa3/0x100 [nfsd]
[  144.020471]  kthread+0xd2/0x100
[  144.020472]  ? __pfx_kthread+0x10/0x10
[  144.020473]  ret_from_fork+0x34/0x50
[  144.020475]  ? __pfx_kthread+0x10/0x10
[  144.020476]  ret_from_fork_asm+0x1a/0x30
[  144.020478]  </TASK>

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Bug#1128861: linux: when serving NFS, client attempts to lock served files fail with "No locks available" Philip Hands <phil@hands.com> - 2026-02-23 20:40 +0100
  Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-23 23:30 +0100
  Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-24 00:40 +0100
    Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-24 01:30 +0100
  Bug#1128861: Revert 18744bc56b0ec appears to resolve it Tj <tj.iam.tj@proton.me> - 2026-02-24 01:50 +0100
  Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Tj <tj.iam.tj@proton.me> - 2026-02-24 03:20 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Tj <tj.iam.tj@proton.me> - 2026-02-24 14:00 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Thorsten Leemhuis <regressions@leemhuis.info> - 2026-02-27 11:10 +0100
      Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Salvatore Bonaccorso <carnil@debian.org> - 2026-03-04 11:40 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Sasha Levin <sashal@kernel.org> - 2026-03-04 16:50 +0100
  Processed: Re: Bug#1128861: Regression: Missing check in  nfsd_permission() causes -ENOLCK No locks available "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-03-04 11:40 +0100
  Bug#1128861: [PATCH] lockd: fix TEST handling when not all permissions are available. Ben Hutchings <ben@decadent.org.uk> - 2026-03-25 21:40 +0100
  Bug#1128861: [PATCH v2] lockd: fix TEST handling when not all permissions are available. Uwe Kleine-König <ukleinek@debian.org> - 2026-04-01 15:00 +0200

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