CVE-2022-48868

一、漏洞信息
 漏洞编号：[CVE-2022-48868](https://nvd.nist.gov/vuln/detail/CVE-2022-48868)
 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：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:dmaengine: idxd: Let probe fail when workqueue cannot be enabledThe workqueue is enabled when the appropriate driver is loaded anddisabled when the driver is removed. When the driver is removed itassumes that the workqueue was enabled successfully and proceeds tofree allocations made during workqueue enabling.Failure during workqueue enabling does not prevent the driver frombeing loaded. This is because the error path within drv_enable_wq()returns success unless a second failure is encounteredduring the error path. By returning success it is possible to loadthe driver even if the workqueue cannot be enabled andallocations that do not exist are attempted to be freed duringdriver remove.Some examples of problematic flows:(a) idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq(): In above flow, if idxd_wq_request_irq() fails then idxd_wq_unmap_portal() is called on error exit path, but drv_enable_wq() returns 0 because idxd_wq_disable() succeeds. The driver is thus loaded successfully. idxd_dmaengine_drv_remove()->drv_disable_wq()->idxd_wq_unmap_portal() Above flow on driver unload triggers the WARN in devm_iounmap() because the device resource has already been removed during error path of drv_enable_wq().(b) idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq(): In above flow, if idxd_wq_request_irq() fails then idxd_wq_init_percpu_ref() is never called to initialize the percpu counter, yet the driver loads successfully because drv_enable_wq() returns 0. idxd_dmaengine_drv_remove()->__idxd_wq_quiesce()->percpu_ref_kill(): Above flow on driver unload triggers a BUG when attempting to drop the initial ref of the uninitialized percpu ref: BUG: kernel NULL pointer dereference, address: 0000000000000010Fix the drv_enable_wq() error path by returning the original error thatindicates failure of workqueue enabling. This ensures that the probefails when an error is encountered and the driver remove paths are onlyattempted when the workqueue was enabled successfully.
 漏洞公开时间：2024-08-21 15:15:04
 漏洞创建时间：2024-08-21 19:09:25
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-48868
<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/0f150134dd795ffcd60b798a85ab737d8d010fb7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48868 | https://bugzilla.suse.com/show_bug.cgi?id=1229506 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2022-48868 | https://bugzilla.suse.com/show_bug.cgi?id=1229506 |
| suse_bugzilla | https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7 | https://bugzilla.suse.com/show_bug.cgi?id=1229506 |
| suse_bugzilla | https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 | https://bugzilla.suse.com/show_bug.cgi?id=1229506 |
| suse_bugzilla | https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f | https://bugzilla.suse.com/show_bug.cgi?id=1229506 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2022-48868 | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://git.kernel.org/linus/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f (6.2-rc5) | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7 | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2022-48868 | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2022-48868 | https://ubuntu.com/security/CVE-2022-48868 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2022-48868 | https://ubuntu.com/security/CVE-2022-48868 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2022-48868 |
| cve_search |  | https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7 |
| cve_search |  | https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 |
| cve_search |  | https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f |

</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:
  openBrain开源漏洞感知系统
 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  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7 |  | nvd |
|  |  | https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 |  | nvd |
|  |  | https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f |  | nvd |
| linux |  | https://git.kernel.org/linus/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f | https://git.kernel.org/linus/1f2bb40337f0df1d9af80793e9fdacff7706e654 | ubuntu |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
                                            Reserved.                     
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-22.03-LTS-SP1(5.10.0):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-20.03-LTS-SP4(4.19.90):不受影响
5.master(6.6.0):不受影响
6.openEuler-24.03-LTS(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-22.03-LTS-SP1(5.10.0):正常修复
2.openEuler-22.03-LTS-SP3(5.10.0):正常修复
3.openEuler-22.03-LTS-SP4(5.10.0):正常修复
4.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
5.master(6.6.0):不受影响-漏洞代码不存在
6.openEuler-24.03-LTS(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

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1016

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