linux-cve-announce - CVE-2023-54000: net: hns3: fix deadlock issue when externel

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Message-ID: <2025122426-CVE-2023-54000-b0c0@gregkh>
Date: Wed, 24 Dec 2025 11:56:44 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54000: net: hns3: fix deadlock issue when externel_lb and reset are executed together

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

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

net: hns3: fix deadlock issue when externel_lb and reset are executed together

When externel_lb and reset are executed together, a deadlock may
occur:
[ 3147.217009] INFO: task kworker/u321:0:7 blocked for more than 120 seconds.
[ 3147.230483] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3147.238999] task:kworker/u321:0  state:D stack:    0 pid:    7 ppid:     2 flags:0x00000008
[ 3147.248045] Workqueue: hclge hclge_service_task [hclge]
[ 3147.253957] Call trace:
[ 3147.257093]  __switch_to+0x7c/0xbc
[ 3147.261183]  __schedule+0x338/0x6f0
[ 3147.265357]  schedule+0x50/0xe0
[ 3147.269185]  schedule_preempt_disabled+0x18/0x24
[ 3147.274488]  __mutex_lock.constprop.0+0x1d4/0x5dc
[ 3147.279880]  __mutex_lock_slowpath+0x1c/0x30
[ 3147.284839]  mutex_lock+0x50/0x60
[ 3147.288841]  rtnl_lock+0x20/0x2c
[ 3147.292759]  hclge_reset_prepare+0x68/0x90 [hclge]
[ 3147.298239]  hclge_reset_subtask+0x88/0xe0 [hclge]
[ 3147.303718]  hclge_reset_service_task+0x84/0x120 [hclge]
[ 3147.309718]  hclge_service_task+0x2c/0x70 [hclge]
[ 3147.315109]  process_one_work+0x1d0/0x490
[ 3147.319805]  worker_thread+0x158/0x3d0
[ 3147.324240]  kthread+0x108/0x13c
[ 3147.328154]  ret_from_fork+0x10/0x18

In externel_lb process, the hns3 driver call napi_disable()
first, then the reset happen, then the restore process of the
externel_lb will fail, and will not call napi_enable(). When
doing externel_lb again, napi_disable() will be double call,
cause a deadlock of rtnl_lock().

This patch use the HNS3_NIC_STATE_DOWN state to protect the
calling of napi_disable() and napi_enable() in externel_lb
process, just as the usage in ndo_stop() and ndo_start().

The Linux kernel CVE team has assigned CVE-2023-54000 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.1 with commit 04b6ba143521f4485b7f2c36c655b262a79dae97 and fixed in 6.1.46 with commit 743f7c1762e098048ede8cdf8c89a118f8d12391
	Issue introduced in 6.1 with commit 04b6ba143521f4485b7f2c36c655b262a79dae97 and fixed in 6.4.11 with commit ef2d6bf9695669d31ece9f2ef39dec84874a87c7
	Issue introduced in 6.1 with commit 04b6ba143521f4485b7f2c36c655b262a79dae97 and fixed in 6.5 with commit ac6257a3ae5db5193b1f19c268e4f72d274ddb88

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2023-54000
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/ethernet/hisilicon/hns3/hns3_enet.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/d9f609cb50ebab4aa6341112f406bf9d3928ac81
	https://git.kernel.org/stable/c/743f7c1762e098048ede8cdf8c89a118f8d12391
	https://git.kernel.org/stable/c/ef2d6bf9695669d31ece9f2ef39dec84874a87c7
	https://git.kernel.org/stable/c/ac6257a3ae5db5193b1f19c268e4f72d274ddb88