net/mlx5e: Move representor vnic reporter to eswitch devlink port

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Summary

CVECVE-2026-97962
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:23 UTC
Updated2026-09-25 11:17:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Move representor vnic reporter to eswitch devlink port The representor vnic devlink health reporter is created and destroyed along the representor netdev (un)load path, which is not serialized by the devlink instance lock. Destroying the reporter from there triggers a devl_assert_locked() splat on driver unbind: WARNING: net/devlink/core.c:259 at devl_assert_locked+0x54/0x70, CPU#2: bash/3758 Modules linked in: mlx5_vdpa vringh vdpa mlx5_ib mlx5_fwctl mlx5_core ... CPU: 2 UID: 0 PID: 3758 Comm: bash Tainted: G W 6.19.0+ #1 PREEMPT Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), ... RIP: 0010:devl_assert_locked+0x54/0x70 Call Trace: <TASK> devl_health_reporter_destroy+0x3a/0x1b0 mlx5e_vport_rep_unload+0x12d/0x2b0 [mlx5_core] mlx5_eswitch_unregister_vport_reps+0x1b8/0x220 [mlx5_core] ? __esw_offloads_unload_rep+0x190/0x190 [mlx5_core] ? kernfs_remove_by_name_ns+0xc3/0xf0 device_release_driver_internal+0x3b2/0x560 unbind_store+0xce/0xf0 Move the reporter's lifecycle to the eswitch devlink port (un)register paths, which are already serialized by the devlink instance lock, and store the handle on mlx5_devlink_port. Use the port's mlx5_vport as the reporter priv since the diagnose callback only needs a device handle and a vport number, and mlx5_vport carries both and is initialized before any representor driver probes.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cf14af140a5ad0937d385ce693100f33f02e9c54 dcaba72c85c14fe7393a59d61695941e6ccbd7d7 git Not specified
CNA Linux Linux affected cf14af140a5ad0937d385ce693100f33f02e9c54 d1fcff9b39bac188ef62a77ebd176484be928ec2 git Not specified
CNA Linux Linux affected cf14af140a5ad0937d385ce693100f33f02e9c54 7f26a5e8040b4957ef4dbdfcde6cc7ba2db53937 git Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7f26a5e8040b4957ef4dbdfcde6cc7ba2db53937 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d1fcff9b39bac188ef62a77ebd176484be928ec2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dcaba72c85c14fe7393a59d61695941e6ccbd7d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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