CVE-2021-47391

一、漏洞信息
 漏洞编号：[CVE-2021-47391](https://nvd.nist.gov/vuln/detail/CVE-2021-47391)
 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 V2.0分值：
  BaseScore：0.0 Low
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:RDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requestsThe FSM can run in a circle allowing rdma_resolve_ip() to be called twiceon the same id_priv. While this cannot happen without going through thework, it violates the invariant that the same address resolutionbackground request cannot be active twice.       CPU 1                                  CPU 2rdma_resolve_addr():  RDMA_CM_IDLE -> RDMA_CM_ADDR_QUERY  rdma_resolve_ip(addr_handler)  #1			 process_one_req(): for #1                          addr_handler():                            RDMA_CM_ADDR_QUERY -> RDMA_CM_ADDR_BOUND                            mutex_unlock(&id_priv->handler_mutex);                            [.. handler still running ..]rdma_resolve_addr():  RDMA_CM_ADDR_BOUND -> RDMA_CM_ADDR_QUERY  rdma_resolve_ip(addr_handler)    !! two requests are now on the req_listrdma_destroy_id(): destroy_id_handler_unlock():  _destroy_id():   cma_cancel_operation():    rdma_addr_cancel()                          // process_one_req() self removes it		          spin_lock_bh(&lock);                           cancel_delayed_work(&req->work);	                   if (!list_empty(&req->list)) == true      ! rdma_addr_cancel() returns after process_on_req #1 is done   kfree(id_priv)			 process_one_req(): for #2                          addr_handler():	                    mutex_lock(&id_priv->handler_mutex);                            !! Use after free on id_privrdma_addr_cancel() expects there to be one req on the list and onlycancels the first one. The self-removal behavior of the work only happensafter the handler has returned. This yields a situations where thereq_list can have two reqs for the same  handle  but rdma_addr_cancel()only cancels the first one.The second req remains active beyond rdma_destroy_id() and willuse-after-free id_priv once it inevitably triggers.Fix this by remembering if the id_priv has called rdma_resolve_ip() andalways cancel before calling it again. This ensures the req_list nevergets more than one item in it and doesn t cost anything in the normal flowthat never uses this strange error path.
 漏洞公开时间：2024-05-21 23:15:24
 漏洞创建时间：2024-05-22 03:51:14
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-47391
<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/03d884671572af8bcfbc9e63944c1021efce7589 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/305d568b72f17f674155a2a8275f865f207b3808 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9a085fa9b7d644a234465091e038c1911e1a4f2a |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47391 | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47391 | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://git.kernel.org/stable/c/03d884671572af8bcfbc9e63944c1021efce7589 | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://git.kernel.org/stable/c/305d568b72f17f674155a2a8275f865f207b3808 | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://git.kernel.org/stable/c/9a085fa9b7d644a234465091e038c1911e1a4f2a | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47391.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2282349 | https://bugzilla.suse.com/show_bug.cgi?id=1225318 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052146-CVE-2021-47391-45fb@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282349 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47391 | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://git.kernel.org/linus/305d568b72f17f674155a2a8275f865f207b3808 (5.15-rc4) | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://git.kernel.org/stable/c/9a085fa9b7d644a234465091e038c1911e1a4f2a | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://git.kernel.org/stable/c/03d884671572af8bcfbc9e63944c1021efce7589 | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://git.kernel.org/stable/c/305d568b72f17f674155a2a8275f865f207b3808 | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47391 | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47391 | https://ubuntu.com/security/CVE-2021-47391 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47391 | https://ubuntu.com/security/CVE-2021-47391 |

</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  |
| ------- | -------- | ------- | -------- | --------- |
| linux |  | https://git.kernel.org/linus/305d568b72f17f674155a2a8275f865f207b3808 | https://git.kernel.org/linus/e51060f08a61965c4dd91516d82fe90617152590 | ubuntu |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
    Reserved. 
 openEuler评分：
  3.9
 Vector：CVSS：2.0/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(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):不受影响
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响
5.master(6.1.0):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

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(6.1.0):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

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1862

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