CVE-2023-52570

一、漏洞信息
 漏洞编号：[CVE-2023-52570](https://nvd.nist.gov/vuln/detail/CVE-2023-52570)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：6.1.19,6.4.0
 CVSS V3.0分值：
  BaseScore：0.0 None
  Vector：CVSS：3.0/
 漏洞简述：
  A vulnerability was found in Linux Kernel up to 6.1.55/6.5.5 (Operating System). It has been classified as problematic.CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 6.1.56, 6.5.6 or 6.6 eliminates this vulnerability. Applying the patch c01b2e0ee22e/52093779b183/c777b11d34e0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
 漏洞公开时间：2024-03-02 00:00:00
 漏洞创建时间：2024-03-02 22:47:20
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2023-52570
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
|  | https://git.kernel.org/stable/c/52093779b1830ac184a23848d971f06404cf513e |  |
|  | https://git.kernel.org/stable/c/c01b2e0ee22ef8b4dd7509a93aecc0ac0826bae4 |  |
|  | https://git.kernel.org/stable/c/c777b11d34e0f47dbbc4b018ef65ad030f2b283a |  |
|  | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52570 |  |
|  | https://git.kernel.org/linus/c777b11d34e0f47dbbc4b018ef65ad030f2b283a |  |
|  | https://www.cve.org/CVERecord?id=CVE-2023-52570 |  |

</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>

无
</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:vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent()Inject fault while probing mdpy.ko, if kstrdup() of create_dir() fails inkobject_add_internal() in kobject_init_and_add() in mdev_type_add()in parent_create_sysfs_files(), it will return 0 and probe successfully.And when rmmod mdpy.ko, the mdpy_dev_exit() will callmdev_unregister_parent(), the mdev_type_remove() may traverse uninitializedparent->types[i] in parent_remove_sysfs_files(), and it will causebelow null-ptr-deref.If mdev_type_add() fails, return the error code and kset_unregister()to fix the issue. general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 2 PID: 10215 Comm: rmmod Tainted: G        W        N 6.6.0-rc2+ #20 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:__kobject_del+0x62/0x1c0 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 51 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 28 48 8d 7d 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8b 75 10 48 89 df 48 8d 6b 3c e8 RSP: 0018:ffff88810695fd30 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffffa0270268 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10233a4ef1 R10: ffff888119d2778b R11: 0000000063666572 R12: 0000000000000000 R13: fffffbfff404e2d4 R14: dffffc0000000000 R15: ffffffffa0271660 FS:  00007fbc81981540(0000) GS:ffff888119d00000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc14a142dc0 CR3: 0000000110a62003 CR4: 0000000000770ee0 DR0: ffffffff8fb0bce8 DR1: ffffffff8fb0bce9 DR2: ffffffff8fb0bcea DR3: ffffffff8fb0bceb DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace:  <TASK>  ? die_addr+0x3d/0xa0  ? exc_general_protection+0x144/0x220  ? asm_exc_general_protection+0x22/0x30  ? __kobject_del+0x62/0x1c0  kobject_del+0x32/0x50  parent_remove_sysfs_files+0xd6/0x170 [mdev]  mdev_unregister_parent+0xfb/0x190 [mdev]  ? mdev_register_parent+0x270/0x270 [mdev]  ? find_module_all+0x9d/0xe0  mdpy_dev_exit+0x17/0x63 [mdpy]  __do_sys_delete_module.constprop.0+0x2fa/0x4b0  ? module_flags+0x300/0x300  ? __fput+0x4e7/0xa00  do_syscall_64+0x35/0x80  entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fbc813221b7 Code: 73 01 c3 48 8b 0d d1 8c 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 8c 2c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe780e0648 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 RAX: ffffffffffffffda RBX: 00007ffe780e06a8 RCX: 00007fbc813221b7 RDX: 000000000000000a RSI: 0000000000000800 RDI: 000055e214df9b58 RBP: 000055e214df9af0 R08: 00007ffe780df5c1 R09: 0000000000000000 R10: 00007fbc8139ecc0 R11: 0000000000000206 R12: 00007ffe780e0870 R13: 00007ffe780e0ed0 R14: 000055e214df9260 R15: 000055e214df9af0  </TASK> Modules linked in: mdpy(-) mdev vfio_iommu_type1 vfio [last unloaded: mdpy] Dumping ftrace buffer:    (ftrace buffer empty) ---[ end trace 0000000000000000 ]--- RIP: 0010:__kobject_del+0x62/0x1c0 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 51 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 28 48 8d 7d 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 01 00 00 48 8b 75 10 48 89 df 48 8d 6b 3c e8 RSP: 0018:ffff88810695fd30 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffffa0270268 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10233a4ef1 R10: ffff888119d2778b R11: 0000000063666572 R12: 0000000000000000 R13: fffffbfff404e2d4 R14: dffffc0000000000 R15: ffffffffa0271660 FS:  00007fbc81981540(0000) GS:ffff888119d00000(000---truncated--- 
 openEuler评分：
  4.1
 Vector：CVSS：3.0/AV:L/AC:H/PR:H/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-20.03-LTS-SP1:不受影响
2.openEuler-20.03-LTS-SP4:不受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:不受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:不受影响
7.master:不受影响
8.openEuler-22.03-LTS-Next:不受影响
9.openEuler-24.03-LTS:不受影响
10.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-SP1:否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master:否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否

原因说明：
  1.master:
2.openEuler-20.03-LTS-SP4:
3.openEuler-22.03-LTS-SP1:
4.openEuler-22.03-LTS-SP3:
5.openEuler-22.03-LTS-SP4:
6.openEuler-24.03-LTS:
7.openEuler-24.03-LTS-Next:
8.openEuler-24.03-LTS-SP1:

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