CVE-2024-38595

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix peer devlink set for SF representor devlink port

The cited patch change register devlink flow, and neglect to reflect

the changes for peer devlink set logic. Peer devlink set is

triggering a call trace if done after devl_register.[1]

Hence, align peer devlink set logic with register devlink flow.

[1]

WARNING: CPU: 4 PID: 3394 at net/devlink/core.c:155 devlink_rel_nested_in_add+0x177/0x180

CPU: 4 PID: 3394 Comm: kworker/u40:1 Not tainted 6.9.0-rc4_for_linust_min_debug_2024_04_16_14_08 #1

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014

Workqueue: mlx5_vhca_event0 mlx5_vhca_state_work_handler [mlx5_core]

RIP: 0010:devlink_rel_nested_in_add+0x177/0x180

Call Trace:

<TASK>

? __warn+0x78/0x120

? devlink_rel_nested_in_add+0x177/0x180

? report_bug+0x16d/0x180

? handle_bug+0x3c/0x60

? exc_invalid_op+0x14/0x70

? asm_exc_invalid_op+0x16/0x20

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References