ocfs2/cluster: keep heartbeat local node stable

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Summary

CVECVE-2026-90322
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:30 UTC
Updated2026-09-17 17:17:30 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ocfs2/cluster: keep heartbeat local node stable o2nm_node_local_store() handles local=0 by stopping o2net and setting cl_local_node to O2NM_INVALID_NODE_NUM, but it leaves cl_has_local set. That stale state makes o2nm_this_node() return 255, blocks a later local=1 attempt with -EBUSY, and can feed 255 to heartbeat users that call o2nm_this_node() dynamically. Clearing cl_has_local is required when the local node is reset. But heartbeat threads can still be running at that point. They pin the local node config item at startup, yet o2hb_do_disk_heartbeat() and thread teardown re-read o2nm_this_node() for the local slot and for o2nm_undepend_this_node(). Once local=0 has cleared the live local-node state, those dynamic reads return O2NM_MAX_NODES, which is also the invalid node number 255. Store the local node number in the heartbeat region when the region starts. Use that stable node for heartbeat slot writes/checks, negotiation messages, and the final configfs undepend. Stop the heartbeat loop when the current local node no longer matches the stored node, and clear cl_has_local together with cl_local_node in the local=0 path so nodemanager state matches node removal. Validation reproduced this kernel report: KASAN slab-out-of-bounds in o2hb_do_disk_heartbeat+0x372/0xb30 RIP: 0010:memset+0xf/0x20 Read of size 8 Call trace: dump_stack_lvl+0x66/0xa0 print_report+0xd0/0x630 o2hb_do_disk_heartbeat+0x372/0xb30 (fs/ocfs2/cluster/heartbeat.c:1079) srso_alias_return_thunk+0x5/0xfbef5 __virt_addr_valid+0x188/0x2f0 kasan_report+0xe4/0x120 o2hb_do_disk_heartbeat+0x5/0xb30 (fs/ocfs2/cluster/heartbeat.c:1079) o2hb_thread+0x14e/0x770 kthread_affine_node+0x139/0x180 lockdep_hardirqs_on_prepare+0xda/0x190 trace_hardirqs_on+0x18/0x130 kthread+0x19d/0x1e0 ret_from_fork+0x37a/0x4d0 __switch_to+0x2d5/0x6f0 ret_from_fork_asm+0x1a/0x30

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a7f6a5fb4bde142b622706e2006ba33f793e13ed 8e5cb90f212fda9f6cd29915a1ed74353108ceb3 git Not specified
CNA Linux Linux affected a7f6a5fb4bde142b622706e2006ba33f793e13ed 8abb2b7c60d2b2c0f40606048c873096c03874d2 git Not specified
CNA Linux Linux affected a7f6a5fb4bde142b622706e2006ba33f793e13ed 70d7bb7a0be033e5ebe8a2c48974692b1318891c git Not specified
CNA Linux Linux affected a7f6a5fb4bde142b622706e2006ba33f793e13ed 688bc88e2046dd6ce81ce18079b5254cb8dadc0e git Not specified
CNA Linux Linux affected 2.6.16 Not specified
CNA Linux Linux unaffected 2.6.16 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/70d7bb7a0be033e5ebe8a2c48974692b1318891c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8abb2b7c60d2b2c0f40606048c873096c03874d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/688bc88e2046dd6ce81ce18079b5254cb8dadc0e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e5cb90f212fda9f6cd29915a1ed74353108ceb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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