Bug 2400703 (CVE-2023-53507)

Summary:	CVE-2023-53507 kernel: net/mlx5: Unregister devlink params in case interface is down
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Clone Of:		Environment:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-10-01 12:02:34 UTC

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

net/mlx5: Unregister devlink params in case interface is down

Currently, in case an interface is down, mlx5 driver doesn't
unregister its devlink params, which leads to this WARN[1].
Fix it by unregistering devlink params in that case as well.

[1]
[  295.244769 ] WARNING: CPU: 15 PID: 1 at net/core/devlink.c:9042 devlink_free+0x174/0x1fc
[  295.488379 ] CPU: 15 PID: 1 Comm: shutdown Tainted: G S         OE 5.15.0-1017.19.3.g0677e61-bluefield #g0677e61
[  295.509330 ] Hardware name: https://www.mellanox.com BlueField SoC/BlueField SoC, BIOS 4.2.0.12761 Jun  6 2023
[  295.543096 ] pc : devlink_free+0x174/0x1fc
[  295.551104 ] lr : mlx5_devlink_free+0x18/0x2c [mlx5_core]
[  295.561816 ] sp : ffff80000809b850
[  295.711155 ] Call trace:
[  295.716030 ]  devlink_free+0x174/0x1fc
[  295.723346 ]  mlx5_devlink_free+0x18/0x2c [mlx5_core]
[  295.733351 ]  mlx5_sf_dev_remove+0x98/0xb0 [mlx5_core]
[  295.743534 ]  auxiliary_bus_remove+0x2c/0x50
[  295.751893 ]  __device_release_driver+0x19c/0x280
[  295.761120 ]  device_release_driver+0x34/0x50
[  295.769649 ]  bus_remove_device+0xdc/0x170
[  295.777656 ]  device_del+0x17c/0x3a4
[  295.784620 ]  mlx5_sf_dev_remove+0x28/0xf0 [mlx5_core]
[  295.794800 ]  mlx5_sf_dev_table_destroy+0x98/0x110 [mlx5_core]
[  295.806375 ]  mlx5_unload+0x34/0xd0 [mlx5_core]
[  295.815339 ]  mlx5_unload_one+0x70/0xe4 [mlx5_core]
[  295.824998 ]  shutdown+0xb0/0xd8 [mlx5_core]
[  295.833439 ]  pci_device_shutdown+0x3c/0xa0
[  295.841651 ]  device_shutdown+0x170/0x340
[  295.849486 ]  __do_sys_reboot+0x1f4/0x2a0
[  295.857322 ]  __arm64_sys_reboot+0x2c/0x40
[  295.865329 ]  invoke_syscall+0x78/0x100
[  295.872817 ]  el0_svc_common.constprop.0+0x54/0x184
[  295.882392 ]  do_el0_svc+0x30/0xac
[  295.889008 ]  el0_svc+0x48/0x160
[  295.895278 ]  el0t_64_sync_handler+0xa4/0x130
[  295.903807 ]  el0t_64_sync+0x1a4/0x1a8
[  295.911120 ] ---[ end trace 4f1d2381d00d9dce  ]---

Comment 1 Jon Moroney 2025-10-01 23:24:03 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100129-CVE-2023-53507-1165@gregkh/T