pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234

一、漏洞信息
漏洞编号：CVE-2023-52451
漏洞归属组件：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：7.8 High
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:powerpc/pseries/memhp: Fix access beyond end of drmem arraydlpar_memory_remove_by_index() may access beyond the bounds of thedrmem lmb array when the LMB lookup fails to match an entry with thegiven DRC index. When the search fails, the cursor is left pointing to&drmem_info->lmbs[drmem_info->n_lmbs], which is one element past thelast valid entry in the array. The debug message at the end of thefunction then dereferences this pointer: pr_debug( Failed to hot-remove memory at %llx n , lmb->base_addr);This was found by inspection and confirmed with KASAN: pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234 ================================================================== BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658 Read of size 8 at addr c000000364e97fd0 by task bash/949 dump_stack_lvl+0xa4/0xfc (unreliable) print_report+0x214/0x63c kasan_report+0x140/0x2e0 __asan_load8+0xa8/0xe0 dlpar_memory+0x298/0x1658 handle_dlpar_errorlog+0x130/0x1d0 dlpar_store+0x18c/0x3e0 kobj_attr_store+0x68/0xa0 sysfs_kf_write+0xc4/0x110 kernfs_fop_write_iter+0x26c/0x390 vfs_write+0x2d4/0x4e0 ksys_write+0xac/0x1a0 system_call_exception+0x268/0x530 system_call_vectored_common+0x15c/0x2ec Allocated by task 1: kasan_save_stack+0x48/0x80 kasan_set_track+0x34/0x50 kasan_save_alloc_info+0x34/0x50 __kasan_kmalloc+0xd0/0x120 __kmalloc+0x8c/0x320 kmalloc_array.constprop.0+0x48/0x5c drmem_init+0x2a0/0x41c do_one_initcall+0xe0/0x5c0 kernel_init_freeable+0x4ec/0x5a0 kernel_init+0x30/0x1e0 ret_from_kernel_user_thread+0x14/0x1c The buggy address belongs to the object at c000000364e80000 which belongs to the cache kmalloc-128k of size 131072 The buggy address is located 0 bytes to the right of allocated 98256-byte region [c000000364e80000, c000000364e97fd0) ================================================================== pseries-hotplug-mem: Failed to hot-remove memory at 0Log failed lookups with a separate message and dereference thecursor only when it points to a valid entry.
漏洞公开时间：2024-02-23 01:15:08
漏洞创建时间：2024-02-22 17:24:30
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2023-52451

更多参考(点击展开)

参考来源	参考链接	来源链接
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52451	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2023-52451	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5	https://bugzilla.suse.com/show_bug.cgi?id=1220250
suse_bugzilla	https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e	https://bugzilla.suse.com/show_bug.cgi?id=1220250
debian		https://security-tracker.debian.org/tracker/CVE-2023-52451
anolis		https://anas.openanolis.cn/cves/detail/CVE-2023-52451
cve_search		https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c
cve_search		https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7
cve_search		https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e
cve_search		https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d
cve_search		https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0
cve_search		https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e
cve_search		https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc
cve_search		https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5
snyk	https://github.com/torvalds/linux/commit/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5	https://security.snyk.io/vuln/SNYK-UNMANAGED-TORVALDSLINUX-6281836

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：

详情(点击展开)

影响的包	修复版本	修复补丁	问题引入补丁	来源
		https://github.com/torvalds/linux/commit/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5		snyk
		https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0		nvd
		https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc		nvd
		https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d		nvd
		https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7		nvd
		https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e		nvd
		https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c		nvd
		https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5		nvd
		https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e		nvd
linux_kernel	4.19.306	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=bb79613a9a704469ddb8d6c6029d532a5cea384c	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	5.10.209	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=b582aa1f66411d4adcc1aa55b8c575683fb4687e	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	5.15.148	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=999a27b3ce9a69d54ccd5db000ec3a447bc43e6d	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	5.4.268	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	6.1.75	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=026fd977dc50ff4a5e09bfb0603557f104d3f3a0	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	6.6.14	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=df16afba2378d985359812c865a15c05c70a967e	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves
linux_kernel	6.7.2	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=708a4b59baad96c4718dc0bd3a3427d3ab22fedc	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=51925fb3c5c9	linuxkernelcves

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:powerpc/pseries/memhp: Fix access beyond end of drmem arraydlpar_memory_remove_by_index() may access beyond the bounds of thedrmem lmb array when the LMB lookup fails to match an entry with thegiven DRC index. When the search fails, the cursor is left pointing to&drmem_info->lmbs[drmem_info->n_lmbs], which is one element past thelast valid entry in the array. The debug message at the end of thefunction then dereferences this pointer: pr_debug( Failed to hot-remove memory at %llx n , lmb->base_addr);This was found by inspection and confirmed with KASAN: pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234 ================================================================== BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658 Read of size 8 at addr c000000364e97fd0 by task bash/949 dump_stack_lvl+0xa4/0xfc (unreliable) print_report+0x214/0x63c kasan_report+0x140/0x2e0 __asan_load8+0xa8/0xe0 dlpar_memory+0x298/0x1658 handle_dlpar_errorlog+0x130/0x1d0 dlpar_store+0x18c/0x3e0 kobj_attr_store+0x68/0xa0 sysfs_kf_write+0xc4/0x110 kernfs_fop_write_iter+0x26c/0x390 vfs_write+0x2d4/0x4e0 ksys_write+0xac/0x1a0 system_call_exception+0x268/0x530 system_call_vectored_common+0x15c/0x2ec Allocated by task 1: kasan_save_stack+0x48/0x80 kasan_set_track+0x34/0x50 kasan_save_alloc_info+0x34/0x50 __kasan_kmalloc+0xd0/0x120 __kmalloc+0x8c/0x320 kmalloc_array.constprop.0+0x48/0x5c drmem_init+0x2a0/0x41c do_one_initcall+0xe0/0x5c0 kernel_init_freeable+0x4ec/0x5a0 kernel_init+0x30/0x1e0 ret_from_kernel_user_thread+0x14/0x1c The buggy address belongs to the object at c000000364e80000 which belongs to the cache kmalloc-128k of size 131072 The buggy address is located 0 bytes to the right of allocated 98256-byte region [c000000364e80000, c000000364e97fd0) ================================================================== pseries-hotplug-mem: Failed to hot-remove memory at 0Log failed lookups with a separate message and dereference thecursor only when it points to a valid entry.
openEuler评分：
7.8
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.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

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

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If you have any questions, please contact the SIG: Kernel, and any of the maintainers.

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**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
**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;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
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-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):

-----------------------------------------------------------------------
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

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2023-52451	None	None	https://git.kernel.org/stable/c/bd68ffce69f6cf8ddd3a3c32549d1d2275e49fc5 https://git.kernel.org/stable/c/bb79613a9a704469ddb8d6c6029d532a5cea384c https://git.kernel.org/stable/c/708a4b59baad96c4718dc0bd3a3427d3ab22fedc https://git.kernel.org/stable/c/026fd977dc50ff4a5e09bfb0603557f104d3f3a0 https://git.kernel.org/stable/c/b582aa1f66411d4adcc1aa55b8c575683fb4687e https://git.kernel.org/stable/c/df16afba2378d985359812c865a15c05c70a967e https://git.kernel.org/stable/c/9b5f03500bc5b083c0df696d7dd169d7ef3dd0c7 https://git.kernel.org/stable/c/999a27b3ce9a69d54ccd5db000ec3a447bc43e6d
https://ubuntu.com/security/CVE-2023-52451	None	None	https://discourse.ubuntu.com/c/ubuntu-pro
https://www.opencve.io/cve/CVE-2023-52451
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-52451
https://security-tracker.debian.org/tracker/CVE-2023-52451

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。
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-2023-52451

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

powerpc/pseries/memhp: Fix access beyond end of drmem array

dlpar_memory_remove_by_index() may access beyond the bounds of the
drmem lmb array when the LMB lookup fails to match an entry with the
given DRC index. When the search fails, the cursor is left pointing to
&drmem_info->lmbs[drmem_info->n_lmbs], which is one element past the
last valid entry in the array. The debug message at the end of the
function then dereferences this pointer:

    pr_debug("Failed to hot-remove memory at %llx\n",
             lmb->base_addr);

This was found by inspection and confirmed with KASAN:

pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234

BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658
Read of size 8 at addr c000000364e97fd0 by task bash/949

dump_stack_lvl+0xa4/0xfc (unreliable)
print_report+0x214/0x63c
kasan_report+0x140/0x2e0
__asan_load8+0xa8/0xe0
dlpar_memory+0x298/0x1658
handle_dlpar_errorlog+0x130/0x1d0
dlpar_store+0x18c/0x3e0
kobj_attr_store+0x68/0xa0
sysfs_kf_write+0xc4/0x110
kernfs_fop_write_iter+0x26c/0x390
vfs_write+0x2d4/0x4e0
ksys_write+0xac/0x1a0
system_call_exception+0x268/0x530
system_call_vectored_common+0x15c/0x2ec

Allocated by task 1:
kasan_save_stack+0x48/0x80
kasan_set_track+0x34/0x50
kasan_save_alloc_info+0x34/0x50
__kasan_kmalloc+0xd0/0x120
__kmalloc+0x8c/0x320
kmalloc_array.constprop.0+0x48/0x5c
drmem_init+0x2a0/0x41c
do_one_initcall+0xe0/0x5c0
kernel_init_freeable+0x4ec/0x5a0
kernel_init+0x30/0x1e0
ret_from_kernel_user_thread+0x14/0x1c

The buggy address belongs to the object at c000000364e80000
which belongs to the cache kmalloc-128k of size 131072
The buggy address is located 0 bytes to the right of
allocated 98256-byte region [c000000364e80000, c000000364e97fd0)

==================================================================
pseries-hotplug-mem: Failed to hot-remove memory at 0

Log failed lookups with a separate message and dereference the
cursor only when it points to a valid entry.

openEuler评分:(评分和向量)
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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:受影响
5.master(6.1.0):不受影响
6.openEuler-24.03-LTS:不受影响
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

===========================================================

@CTC-XiboWang 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:powerpc/pseries/memhp: Fix access beyond end of drmem arraydlpar_memory_remove_by_index() may access beyond the bounds of thedrmem lmb array when the LMB lookup fails to match an entry with thegiven DRC index. When the search fails, the cursor is left pointing to&drmem_info->lmbs[drmem_info->n_lmbs], which is one element past thelast valid entry in the array. The debug message at the end of thefunction then dereferences this pointer:        pr_debug("Failed to hot-remove memory at %llx\n",                 lmb->base_addr);This was found by inspection and confirmed with KASAN:  pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234  ==================================================================  BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658  Read of size 8 at addr c000000364e97fd0 by task bash/949  dump_stack_lvl+0xa4/0xfc (unreliable)  print_report+0x214/0x63c  kasan_report+0x140/0x2e0  __asan_load8+0xa8/0xe0  dlpar_memory+0x298/0x1658  handle_dlpar_errorlog+0x130/0x1d0  dlpar_store+0x18c/0x3e0  kobj_attr_store+0x68/0xa0  sysfs_kf_write+0xc4/0x110  kernfs_fop_write_iter+0x26c/0x390  vfs_write+0x2d4/0x4e0  ksys_write+0xac/0x1a0  system_call_exception+0x268/0x530  system_call_vectored_common+0x15c/0x2ec  Allocated by task 1:   kasan_save_stack+0x48/0x80   kasan_set_track+0x34/0x50   kasan_save_alloc_info+0x34/0x50   __kasan_kmalloc+0xd0/0x120   __kmalloc+0x8c/0x320   kmalloc_array.constprop.0+0x48/0x5c   drmem_init+0x2a0/0x41c   do_one_initcall+0xe0/0x5c0   kernel_init_freeable+0x4ec/0x5a0   kernel_init+0x30/0x1e0   ret_from_kernel_user_thread+0x14/0x1c  The buggy address belongs to the object at c000000364e80000   which belongs to the cache kmalloc-128k of size 131072  The buggy address is located 0 bytes to the right of   allocated 98256-byte region [c000000364e80000, c000000364e97fd0)  ==================================================================  pseries-hotplug-mem: Failed to hot-remove memory at 0Log failed lookups with a separate message and dereference thecursor only when it points to a valid entry.|
|已分析|2.openEulerScore|7.8|
|已分析|3.openEulerVector|AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H|
|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-22.03-LTS-SP4:受影响,master:不受影响,openEuler-24.03-LTS: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.**

CVE-2023-52451

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

powerpc/pseries/memhp: Fix access beyond end of drmem array

dlpar_memory_remove_by_index() may access beyond the bounds of the
drmem lmb array when the LMB lookup fails to match an entry with the
given DRC index. When the search fails, the cursor is left pointing to
&drmem_info->lmbs[drmem_info->n_lmbs], which is one element past the
last valid entry in the array. The debug message at the end of the
function then dereferences this pointer:

    pr_debug("Failed to hot-remove memory at %llx\n",
             lmb->base_addr);