CVE-2024-39508

一、漏洞信息
 漏洞编号：[CVE-2024-39508](https://nvd.nist.gov/vuln/detail/CVE-2024-39508)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：0.0 None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:io_uring/io-wq: Use set_bit() and test_bit() at worker->flagsUtilize set_bit() and test_bit() on worker->flags within io_uring/io-wqto address potential data races.The structure io_worker->flags may be accessed through various datapaths, leading to concurrency issues. When KCSAN is enabled, it revealsdata races occurring in io_worker_handle_work andio_wq_activate_free_worker functions.	 BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker	 write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28:	 io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569)	 io_wq_worker (io_uring/io-wq.c:?)<snip>	 read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5:	 io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285)	 io_wq_enqueue (io_uring/io-wq.c:947)	 io_queue_iowq (io_uring/io_uring.c:524)	 io_req_task_submit (io_uring/io_uring.c:1511)	 io_handle_tw_list (io_uring/io_uring.c:1198)<snip>Line numbers against commit 18daea77cca6 ( Merge tag  for-linus  ofgit://git.kernel.org/pub/scm/virt/kvm/kvm ).These races involve writes and reads to the same memory location bydifferent tasks running on different CPUs. To mitigate this, refactorthe code to use atomic operations such as set_bit(), test_bit(), andclear_bit() instead of basic  and  and  or  operations. This ensuresthread-safe manipulation of worker flags.Also, move `create_index` to avoid holes in the structure.
 漏洞公开时间：2024-07-12 21:15:13
 漏洞创建时间：2024-07-23 18:07:09
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-39508
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-39508 | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-39508 | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| suse_bugzilla | https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| suse_bugzilla | https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| suse_bugzilla | https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0 | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-39508.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1227732 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-39508 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://git.kernel.org/linus/8a565304927fbd28c9f028c492b5c1714002cbab (6.10-rc1) | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://ubuntu.com/security/notices/USN-6999-1 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://ubuntu.com/security/notices/USN-7004-1 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://ubuntu.com/security/notices/USN-7005-1 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-39508 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-39508 | https://ubuntu.com/security/CVE-2024-39508 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-39508 | https://ubuntu.com/security/CVE-2024-39508 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-39508 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2024-39508 |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  其它
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| linux |  | https://git.kernel.org/linus/8a565304927fbd28c9f028c492b5c1714002cbab | https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | ubuntu |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  In the Linux kernel, the following vulnerability has been resolved:io_uring/io-wq: Use set_bit() and test_bit() at worker->flagsUtilize set_bit() and test_bit() on worker->flags within io_uring/io-wqto address potential data races.The structure io_worker->flags may be accessed through various datapaths, leading to concurrency issues. When KCSAN is enabled, it revealsdata races occurring in io_worker_handle_work andio_wq_activate_free_worker functions. BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28: io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569) io_wq_worker (io_uring/io-wq.c:?)<snip> read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5: io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285) io_wq_enqueue (io_uring/io-wq.c:947) io_queue_iowq (io_uring/io_uring.c:524) io_req_task_submit (io_uring/io_uring.c:1511) io_handle_tw_list (io_uring/io_uring.c:1198)<snip>Line numbers against commit 18daea77cca6 ( Merge tag  for-linus  ofgit://git.kernel.org/pub/scm/virt/kvm/kvm ).These races involve writes and reads to the same memory location bydifferent tasks running on different CPUs. To mitigate this, refactorthe code to use atomic operations such as set_bit(), test_bit(), andclear_bit() instead of basic  and  and  or  operations. This ensuresthread-safe manipulation of worker flags.Also, move `create_index` to avoid holes in the structure.
 openEuler评分：
  6.3
 Vector：CVSS：3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP1(5.10.0):受影响
3.openEuler-22.03-LTS-SP3(5.10.0):受影响
4.openEuler-22.03-LTS-SP4(5.10.0):受影响
5.openEuler-24.03-LTS(6.6.0):受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响
8.openEuler-24.03-LTS-SP1(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.6.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否
8.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
  1.openEuler-20.03-LTS-SP4(4.19.90):正常修复
2.openEuler-22.03-LTS-SP1(5.10.0):正常修复
3.openEuler-22.03-LTS-SP3(5.10.0):正常修复
4.openEuler-22.03-LTS-SP4(5.10.0):正常修复
5.openEuler-24.03-LTS(6.6.0):正常修复
6.master(6.6.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不存在
8.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

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**issue处理注意事项:** 
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**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
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************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master(6.1.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

-----------------------------------------------------------------------
issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

<table><tr><th white-space: nowrap;>参考网址</th> <th white-space: nowrap;>关联pr</th> <th white-space: nowrap;>状态</th> <th white-space: nowrap;>补丁链接</th></tr><tr><td rowspan="1">https://nvd.nist.gov/vuln/detail/CVE-2024-39508</td><td>None</td><td>None</td><td><a href=https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf>https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf</a><br /><a href=https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0>https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0</a><br /><a href=https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab>https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab</a></td></tr><tr><td>https://ubuntu.com/security/CVE-2024-39508</td><td></td><td></td><td></td></tr><tr><td rowspan="1">https://www.opencve.io/cve/CVE-2024-39508</td><td>None</td><td>None</td><td><a href=https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf>https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf</a><br /><a href=https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0>https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0</a><br /><a href=https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab>https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab</a></td></tr><tr><td>https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2024-39508</td><td></td><td></td><td></td></tr><tr><td rowspan="1">https://security-tracker.debian.org/tracker/CVE-2024-39508</td><td>None</td><td>None</td><td><a href=https://git.kernel.org/linus/8a565304927fbd28c9f028c492b5c1714002cbab>https://git.kernel.org/linus/8a565304927fbd28c9f028c492b5c1714002cbab</a></td></tr></table>

> 说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用[CVE补丁工具](https://gitee.com/openeuler/cve-manager/blob/master/cve-agency-manager/cve_tracking/README.md)。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址 补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

CVE-2024-39508

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

io_uring/io-wq: Use set_bit() and test_bit() at worker-&gt;flags

Utilize set_bit() and test_bit() on worker-&gt;flags within io_uring/io-wq
to address potential data races.

The structure io_worker-&gt;flags may be accessed through various data
paths, leading to concurrency issues. When KCSAN is enabled, it reveals
data races occurring in io_worker_handle_work and
io_wq_activate_free_worker functions.

BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker
	 write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28:
	 io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569)
	 io_wq_worker (io_uring/io-wq.c:?)
&lt;snip&gt;

read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5:
	 io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285)
	 io_wq_enqueue (io_uring/io-wq.c:947)
	 io_queue_iowq (io_uring/io_uring.c:524)
	 io_req_task_submit (io_uring/io_uring.c:1511)
	 io_handle_tw_list (io_uring/io_uring.c:1198)
&lt;snip&gt;

Line numbers against commit 18daea77cca6 (&#34;Merge tag &#39;for-linus&#39; of
git://git.kernel.org/pub/scm/virt/kvm/kvm&#34;).

These races involve writes and reads to the same memory location by
different tasks running on different CPUs. To mitigate this, refactor
the code to use atomic operations such as set_bit(), test_bit(), and
clear_bit() instead of basic &#34;and&#34; and &#34;or&#34; operations. This ensures
thread-safe manipulation of worker flags.

Also, move `create_index` to avoid holes in the structure.

The Linux kernel CVE team has assigned CVE-2024-39508 to this issue.

openEuler评分:(评分和向量)
3.9
AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:受影响
2.openEuler-22.03-LTS-SP1:受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:不受影响
5.master(6.1.0):不受影响
6.openEuler-24.03-LTS:受影响
7.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 需分析 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:io_uring/io-wq: Use set_bit() and test_bit() at worker-&gt;flagsUtilize set_bit() and test_bit() on worker-&gt;flags within io_uring/io-wqto address potential data races.The structure io_worker-&gt;flags may be accessed through various datapaths, leading to concurrency issues. When KCSAN is enabled, it revealsdata races occurring in io_worker_handle_work andio_wq_activate_free_worker functions. BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28: io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569) io_wq_worker (io_uring/io-wq.c:?)&lt;snip&gt; read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5: io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285) io_wq_enqueue (io_uring/io-wq.c:947) io_queue_iowq (io_uring/io_uring.c:524) io_req_task_submit (io_uring/io_uring.c:1511) io_handle_tw_list (io_uring/io_uring.c:1198)&lt;snip&gt;Line numbers against commit 18daea77cca6 (&#34;Merge tag &#39;for-linus&#39; ofgit://git.kernel.org/pub/scm/virt/kvm/kvm&#34;).These races involve writes and reads to the same memory location bydifferent tasks running on different CPUs. To mitigate this, refactorthe code to use atomic operations such as set_bit(), test_bit(), andclear_bit() instead of basic &#34;and&#34; and &#34;or&#34; operations. This ensuresthread-safe manipulation of worker flags.Also, move `create_index` to avoid holes in the structure.The Linux kernel CVE team has assigned CVE-2024-39508 to this issue.|
|已分析|2.openEulerScore|3.9|
|已分析|3.openEulerVector|AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L|
|已分析|4.受影响版本排查|openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.修复是否涉及abi变化|openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**