CVE-2024-47716

一、漏洞信息
 漏洞编号：[CVE-2024-47716](https://nvd.nist.gov/vuln/detail/CVE-2024-47716)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：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:ARM: 9410/1: vfp: Use asm volatile in fmrx/fmxr macrosFloating point instructions in userspace can crash some arm kernelsbuilt with clang/LLD 17.0.6:    BUG: unsupported FP instruction in kernel mode    FPEXC == 0xc0000780    Internal error: Oops - undefined instruction: 0 [#1] ARM    CPU: 0 PID: 196 Comm: vfp-reproducer Not tainted 6.10.0 #1    Hardware name: BCM2835    PC is at vfp_support_entry+0xc8/0x2cc    LR is at do_undefinstr+0xa8/0x250    pc : [<c0101d50>]    lr : [<c010a80c>]    psr: a0000013    sp : dc8d1f68  ip : 60000013  fp : bedea19c    r10: ec532b17  r9 : 00000010  r8 : 0044766c    r7 : c0000780  r6 : ec532b17  r5 : c1c13800  r4 : dc8d1fb0    r3 : c10072c4  r2 : c0101c88  r1 : ec532b17  r0 : 0044766c    Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none    Control: 00c5387d  Table: 0251c008  DAC: 00000051    Register r0 information: non-paged memory    Register r1 information: vmalloc memory    Register r2 information: non-slab/vmalloc memory    Register r3 information: non-slab/vmalloc memory    Register r4 information: 2-page vmalloc region    Register r5 information: slab kmalloc-cg-2k    Register r6 information: vmalloc memory    Register r7 information: non-slab/vmalloc memory    Register r8 information: non-paged memory    Register r9 information: zero-size pointer    Register r10 information: vmalloc memory    Register r11 information: non-paged memory    Register r12 information: non-paged memory    Process vfp-reproducer (pid: 196, stack limit = 0x61aaaf8b)    Stack: (0xdc8d1f68 to 0xdc8d2000)    1f60:                   0000081f b6f69300 0000000f c10073f4 c10072c4 dc8d1fb0    1f80: ec532b17 0c532b17 0044766c b6f9ccd8 00000000 c010a80c 00447670 60000010    1fa0: ffffffff c1c13800 00c5387d c0100f10 b6f68af8 00448fc0 00000000 bedea188    1fc0: bedea314 00000001 00448ebc b6f9d000 00447608 b6f9ccd8 00000000 bedea19c    1fe0: bede9198 bedea188 b6e1061c 0044766c 60000010 ffffffff 00000000 00000000    Call trace:    [<c0101d50>] (vfp_support_entry) from [<c010a80c>] (do_undefinstr+0xa8/0x250)    [<c010a80c>] (do_undefinstr) from [<c0100f10>] (__und_usr+0x70/0x80)    Exception stack(0xdc8d1fb0 to 0xdc8d1ff8)    1fa0:                                     b6f68af8 00448fc0 00000000 bedea188    1fc0: bedea314 00000001 00448ebc b6f9d000 00447608 b6f9ccd8 00000000 bedea19c    1fe0: bede9198 bedea188 b6e1061c 0044766c 60000010 ffffffff    Code: 0a000061 e3877202 e594003c e3a09010 (eef16a10)    ---[ end trace 0000000000000000 ]---    Kernel panic - not syncing: Fatal exception in interrupt    ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---This is a minimal userspace reproducer on a Raspberry Pi Zero W:    #include <stdio.h>    #include <math.h>    int main(void)    {            double v = 1.0;            printf( %fn , NAN + *(volatile double *)&v);            return 0;    }Another way to consistently trigger the oops is:    calvin@raspberry-pi-zero-w ~$ python -c  import json The bug reproduces only when the kernel is built with DYNAMIC_DEBUG=n,because the pr_debug() calls act as barriers even when not activated.This is the output from the same kernel source built with the samecompiler and DYNAMIC_DEBUG=y, where the userspace reproducer works asexpected:    VFP: bounce: trigger ec532b17 fpexc c0000780    VFP: emulate: INST=0xee377b06 SCR=0x00000000    VFP: bounce: trigger eef1fa10 fpexc c0000780    VFP: emulate: INST=0xeeb40b40 SCR=0x00000000    VFP: raising exceptions 30000000    calvin@raspberry-pi-zero-w ~$ ./vfp-reproducer    nanCrudely grepping for vmsr/vmrs instructions in the otherwise nearlyidential text for vfp_support_entry() makes the problem obvious:    vmlinux.llvm.good [0xc0101cb8] <+48>:  vmrs   r7, fpexc    vmlinux.llvm.good [0xc0101cd8] <+80>:  vmsr   fpexc, r0    vmlinux.llvm.good [0xc0101d20---truncated---
 漏洞公开时间：2024-10-21 20:15
 漏洞创建时间：2024-10-31 22:11:01
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-47716
<details>
<summary>更多参考(点击展开)</summary>

无
</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>

无
</details>
 
二、漏洞分析结构反馈
 影响性分析说明：
  
 openEuler评分：
   
 受影响版本排查(受影响/不受影响)：
  1.master(6.6.0):
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(6.6.0):
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):

原因说明：
  1.master(6.6.0):
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):

@yangyingliang ,@jiaoff ,@guohaocs2c ,@hanjun-guo ,@woqidaideshi ,@newbeats ,@zhangyi089 ,@colyli ,@thundertown ,@htforge ,@chiqijun ,@lengchao ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@wkfxxx ,@SuperSix173 ,@jentlestea ,@oskernel0719 ,@gasonchen 
**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), 原因说明)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(6.6.0):
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(6.6.0):
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):

原因说明：
1.master(6.6.0):
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

src-openEuler/kernel

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内容风险标识

CVE-2024-47716

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