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Type: Bug
Resolution: Unresolved
Priority: Major
Fix Version/s: rhel-10.1
Affects Version/s: rhel-10.1
Component/s: kernel / Virtualization / KVM
Labels:

Fixed in Build:
kernel-6.12.0-109.el10
Regression:
No
Severity:
Moderate
sprint_count:
1

AssignedTeam:
rhel-virt-hwe-s390x
Sub-System Group:

ssg_virtualization

Dev Target Milestone:
21
Internal Target Milestone:
23
Story Points:
200
Blocked:
False
Ready:
False
Blocked Reason:

Hide

None

Show
None
Product Documentation Required:
None
Sprint:
zKVM CY25 sprint 3

Preliminary Testing:
Pass
Testable Builds:

Hide
The following Merge Request has pipeline job artifacts available:

Title: KVM: Fix two memory management related problems on s390x
MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1128
MR Pipeline: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/pipelines/1898153467

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: CENTOS (c10s_merge_request)
DataWarehouse Checkout: https://datawarehouse.cki-project.org/kcidb/checkouts/redhat:1898153758

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Downstream Pipeline Name: 64K (c10s_64k_merge_request)
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Downstream Pipeline Name: 64K_DEBUG (c10s_64k_debug_merge_request)
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Updated 2025-07-01 11:22 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://issues.redhat.com/secure/CreateIssueDetails!init.jspa?pid=12334433&issuetype=1&priority=4&summary=buglinker+webhook+issue&components=kernel-workflow+/+buglinker

Show
The following Merge Request has pipeline job artifacts available: Title: KVM: Fix two memory management related problems on s390x MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1128 MR Pipeline: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/pipelines/1898153467 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: CENTOS (c10s_merge_request) DataWarehouse Checkout: https://datawarehouse.cki-project.org/kcidb/checkouts/redhat:1898153758 6.12.0-102.1128_1898153467.el10.s390x: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153758/publish_s390x/10515289971/artifacts/repo/6.12.0-102.1128_1898153467.el10.s390x/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1898153758/publish_s390x/10515289971/artifacts/repo/6.12.0-102.1128_1898153467.el10.s390x/ 6.12.0-102.1128_1898153467.el10.aarch64: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153758/publish_aarch64/10515289968/artifacts/repo/6.12.0-102.1128_1898153467.el10.aarch64/ Repo 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---------------------------------------- Downstream Pipeline Name: DEBUG (c10s_debug_merge_request) DataWarehouse Checkout: https://datawarehouse.cki-project.org/kcidb/checkouts/redhat:1898153812 6.12.0-102.1128_1898153467.el10.s390x-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153812/publish_s390x/10515290459/artifacts/repo/6.12.0-102.1128_1898153467.el10.s390x/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1898153812/publish_s390x/10515290459/artifacts/repo/6.12.0-102.1128_1898153467.el10.s390x/ 6.12.0-102.1128_1898153467.el10.aarch64-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153812/publish_aarch64/10515290427/artifacts/repo/6.12.0-102.1128_1898153467.el10.aarch64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1898153812/publish_aarch64/10515290427/artifacts/repo/6.12.0-102.1128_1898153467.el10.aarch64/ 6.12.0-102.1128_1898153467.el10.ppc64le-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153812/publish_ppc64le/10515290402/artifacts/repo/6.12.0-102.1128_1898153467.el10.ppc64le/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1898153812/publish_ppc64le/10515290402/artifacts/repo/6.12.0-102.1128_1898153467.el10.ppc64le/ 6.12.0-102.1128_1898153467.el10.x86_64-debug: Artifacts (RPMs): https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/index.html?prefix=trusted-artifacts/1898153812/publish_x86_64/10515290374/artifacts/repo/6.12.0-102.1128_1898153467.el10.x86_64/ Repo URL: https://s3.amazonaws.com/arr-cki-prod-trusted-artifacts/trusted-artifacts/1898153812/publish_x86_64/10515290374/artifacts/repo/6.12.0-102.1128_1898153467.el10.x86_64/ ---------------------------------------- Updated 2025-07-01 11:22 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://issues.redhat.com/secure/CreateIssueDetails!init.jspa?pid=12334433&issuetype=1&priority=4&summary=buglinker+webhook+issue&components=kernel-workflow+/+buglinker
Errata Link:
https://errata.engineering.redhat.com/advisory/146361
Test Coverage:

Automated

ProdDocsReview-CCS:
Unspecified
ProdDocsReview-Dev:
Unspecified
ProdDocsReview-QE:
Unspecified

Experience:
Architecture:

s390x

PX Impact Score:
SFDC Cases Counter:
SFDC Cases Open:
SFDC Cases Links:

Planning:
None
Release Milestone:

Merge Request passes all submitter checks, Merge Request finished CI testing, Merge Request passed CI testing, Merge Request approved by peer review

Running kvm-unit tests on s390x started recently to trigger the following backtrace:

[  418.401553] BUG: Bad page state in process qemu-kvm  pfn:d64f4
[  418.401581] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x166000 pfn:0xd64f4
[  418.401588] flags: 0x2000000000000000(node=0|zone=1)
[  418.401598] raw: 2000000000000000 000000008fae11c0 000000008fae11c0 0000000000000000
[  418.401603] raw: 0000000000166000 0000000000000000 ffffffff00000000 0000000000000000
[  418.401607] page dumped because: page_pool leak
[  418.401610] Modules linked in: kvm rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace nfs_localio netfs rfkill sunrpc pkey_ep11 pkey_cca zcrypt_cex4 virtio_net zcrypt net_failover pkey_pckmo failover vfio_ccw mdev vfio_iommu_type1 vfio drm fuse loop drm_panel_orientation_quirks i2c_core nfnetlink vsock_loopback vmw_vsock_virtio_transport_common vsock ctcm fsm qeth ccwgroup zfcp scsi_transport_fc qdio dasd_fba_mod dasd_eckd_mod dasd_mod xfs ghash_s390 prng des_s390 libdes virtio_blk sha3_512_s390 sha3_256_s390 dm_mirror dm_region_hash dm_log dm_mod pkey aes_s390 [last unloaded: kvm]
[  418.401722] CPU: 2 UID: 0 PID: 37400 Comm: qemu-kvm Kdump: loaded Tainted: G    B             -------  ---  6.12.0-84.606_1817305231.el10.s390x+debug #1
[  418.401731] Tainted: [B]=BAD_PAGE
[  418.401733] Hardware name: IBM 3931 LA1 400 (KVM/Linux)
[  418.401738] Call Trace:
[  418.401741]  [<00051973f294dd7c>] dump_stack_lvl+0x104/0x168 
[  418.401752]  [<00051973f3323eca>] bad_page+0x23a/0x260 
[  418.401758]  [<00051973f3328788>] free_page_is_bad+0x138/0x180 
[  418.401763]  [<00051973f3335c48>] free_unref_page+0x5f8/0xe20 
[  418.401767]  [<00051973f29dc1fa>] gmap_free+0x1aa/0x2b0 
[  418.401773]  [<0005197373fa57c2>] kvm_s390_vsie_destroy+0x192/0x330 [kvm] 
[  418.401835]  [<0005197373f46fc0>] kvm_arch_destroy_vm+0x210/0x340 [kvm] 
[  418.401872]  [<0005197373f0a386>] kvm_destroy_vm+0x346/0x830 [kvm] 
[  418.401906]  [<0005197373f0a944>] kvm_vm_release+0x54/0x70 [kvm] 
[  418.401940]  [<00051973f34a76de>] __fput+0x31e/0x960 
[  418.401945]  [<00051973f2ad0e46>] task_work_run+0x176/0x260 
[  418.401951]  [<00051973f2a64c4c>] do_exit+0x61c/0xce0 
[  418.401956]  [<00051973f2a659c4>] do_group_exit+0xf4/0x320 
[  418.401961]  [<00051973f2a95de4>] get_signal+0x15c4/0x1800 
[  418.401967]  [<00051973f2962ea0>] arch_do_signal_or_restart+0x1c0/0xb90 
[  418.401974]  [<00051973f2cd3948>] syscall_exit_to_user_mode_work+0x1c8/0x270 
[  418.401979]  [<00051973f4a5de16>] __do_syscall+0xf6/0x1c0 
[  418.401986]  [<00051973f4a833e4>] system_call+0x74/0x98 
[  418.401991] INFO: lockdep is turned off.

More failures can be observed here:

https://datawarehouse.cki-project.org/details/test/2372?result=FAIL&arch=s390x&issues_tagged=False&tree=

Initially I noticed that when I run CKI on my RHEL 10.1 KVM rebase, however this issue is older as evident by the list of failures above.

links to

CKI DataWareHouse Issue #3806

Merge Request: KVM: Fix two memory management related problems on s390x

RHSA-2025:146361 kernel bug fix and enhancement update