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Type: Bug
Resolution: Done-Errata
Priority: Undefined
Fix Version/s: rhel-9.4
Affects Version/s: rhel-9.4
Component/s: kernel / File Systems / NFS
Labels:
None

Fixed in Build:
kernel-5.14.0-406.el9
Epic Link:
RHELPLAN-146588
Keywords:

Regression

Pool Team:

sst_filesystems
Sub-System Group:

ssg_filesystems_storage_and_HA

Dev Target Milestone:
18
Internal Target Milestone:
20
Story Points:
3
ACKs Check:

QE ack
Blocked:
False
Blocked Reason:

Hide

None

Show
None

Preliminary Testing:
Pass
Test Link:
https://gitlab.cee.redhat.com/kernel-qe/kernel/-/tree/master/filesystems/nfs/regression/bz1266405-kernel-BUG-at-fs-nfsd-nfs4recover-c-361
Testable Builds:

Hide
The following Merge Request has pipeline job artifacts available:

Title: nfsd: call nfsd_last_thread() before final nfsd_put()
MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/3512
MR Pipeline: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/pipelines/1130451188

The Repo URLs are *not* accessible from a web browser! They only function as a dnf or yum baseurl.

Artifacts expire six weeks after creation. If artifacts are needed after that time please rerun the pipeline by visiting the MR's 'Pipelines' tab and clicking the 'Run pipeline' button.

----------------------------------------

Downstream Pipeline Name: RHEL_COMPAT (c9s_rhel9_compat_merge_request)
Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-internal-contributors/-/pipelines/1130451295
Repo URL: https://s3.upshift.redhat.com/DH-PROD-CKI/internal/1130451295/$basearch/5.14.0-404.3512_1130451188.el9.$basearch
Debug Repo URL: https://s3.upshift.redhat.com/DH-PROD-CKI/internal/1130451295/$basearch-debug/5.14.0-404.3512_1130451188.el9.$basearch

5.14.0-404.3512_1130451188.el9.s390x:
Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_s390x/5882312673/artifacts/repo/5.14.0-404.3512_1130451188.el9.s390x/

5.14.0-404.3512_1130451188.el9.aarch64:
Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_aarch64/5882312663/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/

5.14.0-404.3512_1130451188.el9.ppc64le:
Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_ppc64le/5882312631/artifacts/repo/5.14.0-404.3512_1130451188.el9.ppc64le/

5.14.0-404.3512_1130451188.el9.x86_64-debug:
Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_x86_64_debug/5882312624/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/

5.14.0-404.3512_1130451188.el9.x86_64:
Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_x86_64/5882312610/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/

----------------------------------------

Downstream Pipeline Name: REALTIME (c9s_rt_merge_request)
Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451454

5.14.0-404.3512_1130451188.el9.x86_64-debug:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451454/publish_x86_64_debug/5882313693/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451454/publish_x86_64_debug/5882313693/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/

5.14.0-404.3512_1130451188.el9.x86_64:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451454/publish_x86_64/5882313680/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451454/publish_x86_64/5882313680/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/

----------------------------------------

Downstream Pipeline Name: AUTOMOTIVE (c9s_automotive_check_merge_request)
Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451343

5.14.0-404.358.3512_1130451188.el9iv.aarch64-debug:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_aarch64_debug/5882313039/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_aarch64_debug/5882313039/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/

5.14.0-404.358.3512_1130451188.el9iv.aarch64:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_aarch64/5882313018/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_aarch64/5882313018/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/

5.14.0-404.358.3512_1130451188.el9iv.x86_64-debug:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_x86_64_debug/5882312986/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_x86_64_debug/5882312986/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/

5.14.0-404.358.3512_1130451188.el9iv.x86_64:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_x86_64/5882312967/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_x86_64/5882312967/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/

----------------------------------------

Downstream Pipeline Name: 64K (c9s_64k_merge_request)
Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451270

5.14.0-404.3512_1130451188.el9.aarch64:
Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451270/publish_aarch64/5882312258/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/
Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451270/publish_aarch64/5882312258/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/

----------------------------------------

Updated 2024-01-08 12:54 UTC by buglinker:
- KWF FAQ: https://red.ht/kernel_workflow_doc
- Slack #team-kernel-workflow: https://redhat-internal.slack.com/archives/C04LRUPMJQ5
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- Report an issue: https://gitlab.com/cki-project/kernel-workflow/-/issues/new?issue%5Btitle%5D=buglinker%20webhook%20issue

Show
The following Merge Request has pipeline job artifacts available: Title: nfsd: call nfsd_last_thread() before final nfsd_put() MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/3512 MR Pipeline: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/pipelines/1130451188 The Repo URLs are *not* accessible from a web browser! They only function as a dnf or yum baseurl. Artifacts expire six weeks after creation. If artifacts are needed after that time please rerun the pipeline by visiting the MR's 'Pipelines' tab and clicking the 'Run pipeline' button. ---------------------------------------- Downstream Pipeline Name: RHEL_COMPAT (c9s_rhel9_compat_merge_request) Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-internal-contributors/-/pipelines/1130451295 Repo URL: https://s3.upshift.redhat.com/DH-PROD-CKI/internal/1130451295/$basearch/5.14.0-404.3512_1130451188.el9.$basearch Debug Repo URL: https://s3.upshift.redhat.com/DH-PROD-CKI/internal/1130451295/$basearch-debug/5.14.0-404.3512_1130451188.el9.$basearch 5.14.0-404.3512_1130451188.el9.s390x: Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_s390x/5882312673/artifacts/repo/5.14.0-404.3512_1130451188.el9.s390x/ 5.14.0-404.3512_1130451188.el9.aarch64: Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_aarch64/5882312663/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/ 5.14.0-404.3512_1130451188.el9.ppc64le: Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_ppc64le/5882312631/artifacts/repo/5.14.0-404.3512_1130451188.el9.ppc64le/ 5.14.0-404.3512_1130451188.el9.x86_64-debug: Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_x86_64_debug/5882312624/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ 5.14.0-404.3512_1130451188.el9.x86_64: Artifacts (RPMs): https://s3.upshift.redhat.com/DH-PROD-CKI/index.html?prefix=internal-artifacts/1130451295/publish_x86_64/5882312610/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ ---------------------------------------- Downstream Pipeline Name: REALTIME (c9s_rt_merge_request) Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451454 5.14.0-404.3512_1130451188.el9.x86_64-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451454/publish_x86_64_debug/5882313693/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451454/publish_x86_64_debug/5882313693/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ 5.14.0-404.3512_1130451188.el9.x86_64: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451454/publish_x86_64/5882313680/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451454/publish_x86_64/5882313680/artifacts/repo/5.14.0-404.3512_1130451188.el9.x86_64/ ---------------------------------------- Downstream Pipeline Name: AUTOMOTIVE (c9s_automotive_check_merge_request) Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451343 5.14.0-404.358.3512_1130451188.el9iv.aarch64-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_aarch64_debug/5882313039/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_aarch64_debug/5882313039/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/ 5.14.0-404.358.3512_1130451188.el9iv.aarch64: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_aarch64/5882313018/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_aarch64/5882313018/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.aarch64/ 5.14.0-404.358.3512_1130451188.el9iv.x86_64-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_x86_64_debug/5882312986/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_x86_64_debug/5882312986/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/ 5.14.0-404.358.3512_1130451188.el9iv.x86_64: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451343/publish_x86_64/5882312967/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451343/publish_x86_64/5882312967/artifacts/repo/5.14.0-404.358.3512_1130451188.el9iv.x86_64/ ---------------------------------------- Downstream Pipeline Name: 64K (c9s_64k_merge_request) Downstream Pipeline: https://gitlab.com/redhat/red-hat-ci-tools/kernel/cki-internal-pipelines/cki-trusted-contributors/-/pipelines/1130451270 5.14.0-404.3512_1130451188.el9.aarch64: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1130451270/publish_aarch64/5882312258/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1130451270/publish_aarch64/5882312258/artifacts/repo/5.14.0-404.3512_1130451188.el9.aarch64/ ---------------------------------------- Updated 2024-01-08 12:54 UTC by buglinker: - KWF FAQ: https://red.ht/kernel_workflow_doc - Slack #team-kernel-workflow: https://redhat-internal.slack.com/archives/C04LRUPMJQ5 - Source: https://gitlab.com/cki-project/kernel-workflow/-/blob/main/webhook/buglinker.py - Documentation: https://gitlab.com/cki-project/kernel-workflow/-/blob/main/docs/README.buglinker.md - Report an issue: https://gitlab.com/cki-project/kernel-workflow/-/issues/new?issue%5Btitle%5D=buglinker%20webhook%20issue

Experience:

SFDC Cases Counter:
SFDC Cases Links:

What were you trying to do that didn't work?

Encountered the following BUG when running nfs regression test on kernel-5.14.0-397.el9, which seems to be introduced by ~~RHEL-7936~~.

[  536.401401] NFSD: Using UMH upcall client tracking operations. 
[  536.401410] NFSD: starting 90-second grace period (net f0000000) 
[  536.474614] svc: failed to register nfsdv3 RPC service (errno 512). 
[  536.475334] svc: failed to register nfsaclv3 RPC service (errno 512). 
[  536.482922] ================================================================== 
[  536.482930] BUG: KASAN: use-after-free in __lock_acquire+0x16d6/0x18b0 
[  536.483002] Read of size 8 at addr ffff88800697b428 by task rpc.nfsd/14509 
[  536.483005]  
[  536.483020] CPU: 0 PID: 14509 Comm: rpc.nfsd Kdump: loaded Not tainted 5.14.0-397.el9.x86_64+debug #1 
[  536.483024] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 
[  536.483032] Call Trace: 
[  536.483045]  <TASK> 
[  536.483048]  dump_stack_lvl+0x57/0x81 
[  536.483095]  print_address_description.constprop.0+0x87/0x293 
[  536.483117]  print_report+0x132/0x21c 
[  536.483122]  ? kasan_addr_to_slab+0x9/0xa0 
[  536.483150]  ? __lock_acquire+0x16d6/0x18b0 
[  536.483153]  kasan_report+0xd2/0x210 
[  536.483157]  ? __lock_acquire+0x16d6/0x18b0 
[  536.483162]  __lock_acquire+0x16d6/0x18b0 
[  536.483168]  lock_acquire+0x1da/0x640 
[  536.483171]  ? svc_xprt_names+0x39/0x290 [sunrpc] 
[  536.483461]  ? find_held_lock+0x33/0x120 
[  536.483470]  ? __pfx_lock_acquire+0x10/0x10 
[  536.483473]  ? __lock_release+0x4c1/0xa00 
[  536.483477]  ? __pfx___lock_release+0x10/0x10 
[  536.483480]  ? __pfx___lock_release+0x10/0x10 
[  536.483484]  _raw_spin_lock_bh+0x39/0x80 
[  536.483499]  ? svc_xprt_names+0x39/0x290 [sunrpc] 
[  536.483582]  svc_xprt_names+0x39/0x290 [sunrpc] 
[  536.483665]  ? net_generic+0xa0/0x1c0 [nfsd] 
[  536.483919]  write_ports+0x1b6/0x260 [nfsd] 
[  536.483986]  ? __pfx_write_ports+0x10/0x10 [nfsd] 
[  536.484045]  nfsctl_transaction_write+0xaf/0x110 [nfsd] 
[  536.484104]  nfsctl_transaction_read+0x5f/0xa0 [nfsd] 
[  536.484164]  vfs_read+0x18d/0xa30 
[  536.484182]  ? kvm_sched_clock_read+0x14/0x30 
[  536.484199]  ? sched_clock_cpu+0x15/0x1b0 
[  536.484210]  ? __pfx_vfs_read+0x10/0x10 
[  536.484214]  ? __lock_release+0x4c1/0xa00 
[  536.484217]  ? __pfx___lock_release+0x10/0x10 
[  536.484219]  ? __pfx_lock_acquire+0x10/0x10 
[  536.484221]  ? __pfx_do_sys_openat2+0x10/0x10 
[  536.484230]  ? __fget_light+0x51/0x240 
[  536.484243]  ksys_read+0xf9/0x1d0 
[  536.484246]  ? __pfx_ksys_read+0x10/0x10 
[  536.484248]  ? ktime_get_coarse_real_ts64+0x130/0x170 
[  536.484277]  do_syscall_64+0x5c/0x90 
[  536.484290]  ? lockdep_hardirqs_on+0x79/0x100 
[  536.484295]  ? do_syscall_64+0x69/0x90 
[  536.484299]  ? do_syscall_64+0x69/0x90 
[  536.484302]  ? lockdep_hardirqs_on+0x79/0x100 
[  536.484305]  ? do_syscall_64+0x69/0x90 
[  536.484308]  ? do_syscall_64+0x69/0x90 
[  536.484311]  ? lockdep_hardirqs_on+0x79/0x100 
[  536.484314]  ? do_syscall_64+0x69/0x90 
[  536.484317]  ? asm_exc_page_fault+0x22/0x30 
[  536.484331]  ? lockdep_hardirqs_on+0x79/0x100 
[  536.484334]  entry_SYSCALL_64_after_hwframe+0x72/0xdc 
[  536.484337] RIP: 0033:0x7fe40d33ec62 
[  536.484520] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 3a 0b 08 00 e8 c5 e7 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 
[  536.484523] RSP: 002b:00007fff58c72b78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 
[  536.484537] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe40d33ec62 
[  536.484540] RDX: 0000000000000080 RSI: 0000563366e3ac20 RDI: 0000000000000003 
[  536.484542] RBP: 0000000000000003 R08: 1999999999999999 R09: 0000000000000000 
[  536.484544] R10: 0000000000000000 R11: 0000000000000246 R12: 0000563366e372a6 
[  536.484546] R13: 0000563366e37262 R14: 00007fff58c72c40 R15: 00000000ffffffff 
[  536.484552]  </TASK> 
[  536.484554]  
[  536.484554] Allocated by task 14504: 
[  536.484562]  kasan_save_stack+0x1e/0x40 
[  536.484567]  kasan_set_track+0x21/0x30 
[  536.484569]  __kasan_kmalloc+0x7b/0x90 
[  536.484571]  __svc_create+0x53/0x9c0 [sunrpc] 
[  536.484651]  svc_create_pooled+0x9b/0x530 [sunrpc] 
[  536.484722]  nfsd_create_serv+0x123/0x420 [nfsd] 
[  536.484783]  __write_ports_addfd+0x17d/0x620 [nfsd] 
[  536.484841]  write_ports+0x1eb/0x260 [nfsd] 
[  536.484899]  nfsctl_transaction_write+0xaf/0x110 [nfsd] 
[  536.484961]  vfs_write+0x260/0xe50 
[  536.484964]  ksys_write+0xf9/0x1d0 
[  536.484966]  do_syscall_64+0x5c/0x90 
[  536.484969]  entry_SYSCALL_64_after_hwframe+0x72/0xdc 
[  536.484972]  
[  536.484973] Freed by task 14504: 
[  536.484974]  kasan_save_stack+0x1e/0x40 
[  536.484976]  kasan_set_track+0x21/0x30 
[  536.484978]  kasan_save_free_info+0x2a/0x50 
[  536.484982]  ____kasan_slab_free+0x14c/0x1b0 
[  536.484984]  slab_free_freelist_hook+0x11d/0x1d0 
[  536.484988]  __kmem_cache_free+0xba/0x2c0 
[  536.484990]  __write_ports_addfd+0x508/0x620 [nfsd] 
[  536.485048]  write_ports+0x1eb/0x260 [nfsd] 
[  536.485105]  nfsctl_transaction_write+0xaf/0x110 [nfsd] 
[  536.485166]  vfs_write+0x260/0xe50 
[  536.485168]  ksys_write+0xf9/0x1d0 
[  536.485171]  do_syscall_64+0x5c/0x90 
[  536.485173]  entry_SYSCALL_64_after_hwframe+0x72/0xdc 
[  536.485176]  
[  536.485177] The buggy address belongs to the object at ffff88800697b400 
[  536.485177]  which belongs to the cache kmalloc-512 of size 512 
[  536.485179] The buggy address is located 40 bytes inside of 
[  536.485179]  512-byte region [ffff88800697b400, ffff88800697b600) 
[  536.485182]  
[  536.485183] The buggy address belongs to the physical page: 
[  536.485188] page:0000000002f55b5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6978 
[  536.485201] head:0000000002f55b5d order:3 compound_mapcount:0 nr_pages_mapped:0 pincount:0 
[  536.485203] flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff) 
[  536.485218] raw: 000fffffc0010200 0000000000000000 dead000000000001 ffff888001042c80 
[  536.485223] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 
[  536.485227] page dumped because: kasan: bad access detected 
[  536.485228]  
[  536.485229] Memory state around the buggy address: 
[  536.485231]  ffff88800697b300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 
[  536.485233]  ffff88800697b380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 
[  536.485235] >ffff88800697b400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 
[  536.485236]                                   ^ 
[  536.485238]  ffff88800697b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 
[  536.485240]  ffff88800697b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 
[  536.485241] ================================================================== 
[  536.485246] Disabling lock debugging due to kernel taint 
[  536.495453] ------------[ cut here ]------------ 
[  536.495458] refcount_t: addition on 0; use-after-free. 
[  536.495586] WARNING: CPU: 4 PID: 14509 at lib/refcount.c:25 refcount_warn_saturate+0xee/0x150 
[  536.495623] Modules linked in: rpcrdma rdma_cm iw_cm ib_cm ib_core nfsd nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs rfkill sunrpc snd_hda_codec_generic ledtrig_audio intel_rapl_msr snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core qxl snd_hwdep drm_ttm_helper intel_rapl_common ttm snd_pcm drm_kms_helper snd_timer syscopyarea snd sysfillrect soundcore pcspkr virtio_balloon sysimgblt i2c_piix4 joydev drm fuse xfs libcrc32c sd_mod t10_pi sg ata_generic ata_piix crct10dif_pclmul crc32_pclmul crc32c_intel libata 8139too virtio_console ghash_clmulni_intel 8139cp mii serio_raw dm_mirror dm_region_hash dm_log dm_mod 
[  536.495780] CPU: 4 PID: 14509 Comm: rpc.nfsd Kdump: loaded Tainted: G    B             -------  ---  5.14.0-397.el9.x86_64+debug #1 
[  536.495785] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 
[  536.495788] RIP: 0010:refcount_warn_saturate+0xee/0x150 
[  536.495793] Code: 38 52 55 03 01 e8 32 e8 0a ff 0f 0b eb 91 80 3d 2b 52 55 03 00 75 88 48 c7 c7 60 5e 14 a7 c6 05 1b 52 55 03 01 e8 12 e8 0a ff <0f> 0b e9 6e ff ff ff 80 3d 0a 52 55 03 00 0f 85 61 ff ff ff 48 c7 
[  536.495796] RSP: 0018:ffffc90001cdfac8 EFLAGS: 00010296 
[  536.495801] RAX: 0000000000000000 RBX: ffff88800697b458 RCX: 0000000000000000 
[  536.495807] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 
[  536.495810] RBP: 0000000000000002 R08: 0000000000000001 R09: ffff888072fefd2b 
[  536.495812] R10: ffffed100e5fdfa5 R11: 0000000000000001 R12: 0000000000000000 
[  536.495814] R13: ffffffffac819540 R14: ffff888060563300 R15: 0000000000000004 
[  536.495816] FS:  00007fe40d549740(0000) GS:ffff888072e00000(0000) knlGS:0000000000000000 
[  536.495822] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 
[  536.495824] CR2: 00007fff58d5a080 CR3: 0000000039416005 CR4: 00000000003706e0 
[  536.495827] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 
[  536.495828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 
[  536.495830] Call Trace: 
[  536.495833]  <TASK> 
[  536.495835]  ? show_trace_log_lvl+0x1c4/0x2df 
[  536.495854]  ? show_trace_log_lvl+0x1c4/0x2df 
[  536.495861]  ? nfsd_create_serv+0x3ce/0x420 [nfsd] 
[  536.495983]  ? refcount_warn_saturate+0xee/0x150 
[  536.495987]  ? __warn+0xca/0x1d0 
[  536.496004]  ? irq_work_queue+0xb/0x50 
[  536.496027]  ? refcount_warn_saturate+0xee/0x150 
[  536.496031]  ? report_bug+0x1ef/0x370 
[  536.496043]  ? handle_bug+0x3c/0x70 
[  536.496049]  ? exc_invalid_op+0x14/0x50 
[  536.496053]  ? asm_exc_invalid_op+0x16/0x20 
[  536.496066]  ? refcount_warn_saturate+0xee/0x150 
[  536.496071]  ? refcount_warn_saturate+0xee/0x150 
[  536.496074]  nfsd_create_serv+0x3ce/0x420 [nfsd] 
[  536.496130]  __write_ports_addfd+0x17d/0x620 [nfsd] 
[  536.496180]  ? __pfx___write_ports_addfd+0x10/0x10 [nfsd] 
[  536.496230]  ? __pfx_lock_acquire+0x10/0x10 
[  536.496236]  ? do_raw_spin_trylock+0xb5/0x180 
[  536.496241]  ? __might_fault+0xbc/0x160 
[  536.496260]  ? lock_release+0x285/0x380 
[  536.496265]  write_ports+0x1eb/0x260 [nfsd] 
[  536.496310]  ? __pfx_write_ports+0x10/0x10 [nfsd] 
[  536.496357]  nfsctl_transaction_write+0xaf/0x110 [nfsd] 
[  536.496410]  ? preempt_count_add+0x7d/0x150 
[  536.496451]  vfs_write+0x260/0xe50 
[  536.496458]  ? __pfx_lock_acquire+0x10/0x10 
[  536.496462]  ? __pfx_vfs_write+0x10/0x10 
[  536.496465]  ? do_raw_spin_trylock+0xb5/0x180 
[  536.496469]  ? lock_acquire+0x4ec/0x640 
[  536.496473]  ? __pfx_lock_acquire+0x10/0x10 
[  536.496477]  ? __fget_light+0x51/0x240 
[  536.496484]  ksys_write+0xf9/0x1d0 
[  536.496488]  ? __pfx_ksys_write+0x10/0x10 
[  536.496493]  ? __pfx___x64_sys_write+0x10/0x10 
[  536.496502]  do_syscall_64+0x5c/0x90 
[  536.496506]  ? do_syscall_64+0x69/0x90 
[  536.496510]  ? do_syscall_64+0x69/0x90 
[  536.496513]  ? do_syscall_64+0x69/0x90 
[  536.496517]  ? syscall_exit_to_user_mode+0x1e/0x60 
[  536.496521]  ? trace_hardirqs_on_prepare+0xbd/0x220 
[  536.496535]  ? do_syscall_64+0x69/0x90 
[  536.496538]  ? irqentry_exit_to_user_mode+0xa/0x40 
[  536.496541]  ? trace_hardirqs_on_prepare+0xbd/0x220 
[  536.496545]  entry_SYSCALL_64_after_hwframe+0x72/0xdc 
[  536.496549] RIP: 0033:0x7fe40d33ed07 
[  536.496599] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 
[  536.496602] RSP: 002b:00007fff58c72b78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 
[  536.496612] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe40d33ed07 
[  536.496614] RDX: 0000000000000002 RSI: 0000563366e3ac20 RDI: 0000000000000003 
[  536.496616] RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fff58c72a10 
[  536.496618] R10: 0000000000000004 R11: 0000000000000246 R12: 00005633682498b0 
[  536.496620] R13: 0000563366e37184 R14: 0000563366e37180 R15: 0000000000000004 
[  536.496626]  </TASK> 
[  536.496632] irq event stamp: 9636 
[  536.496640] hardirqs last  enabled at (9635): [<ffffffffa5026286>] bad_range+0x286/0x350 
[  536.496651] hardirqs last disabled at (9634): [<ffffffffa5026256>] bad_range+0x256/0x350 
[  536.496655] softirqs last  enabled at (7474): [<ffffffffa6be8261>] __do_softirq+0x621/0x9c2 
[  536.496665] softirqs last disabled at (9636): [<ffffffffc11cd7f9>] svc_xprt_names+0x39/0x290 [sunrpc] 
[  536.496762] ---[ end trace 7c9c49f25f91c647 ]---