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：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: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 20:15:07
 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>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/39caf610a63786b3b0ef3348ac015edc19827d6a |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/89a906dfa8c3b21b3e5360f73c49234ac1eb885b |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9fc60f2bdd43e758bdf0305c0fc83221419ddb3f |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/cd595d87e5fdd2fc09ea69359aa85e7f12f4b97b |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-47716 | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-47716.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://git.kernel.org/stable/c/9fc60f2bdd43e758bdf0305c0fc83221419ddb3f | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://git.kernel.org/stable/c/cd595d87e5fdd2fc09ea69359aa85e7f12f4b97b | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://git.kernel.org/stable/c/39caf610a63786b3b0ef3348ac015edc19827d6a | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://git.kernel.org/stable/c/89a906dfa8c3b21b3e5360f73c49234ac1eb885b | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-47716 | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2320256 | https://bugzilla.suse.com/show_bug.cgi?id=1232053 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-47716 |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0345.html |

</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>

| 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/39caf610a63786b3b0ef3348ac015edc19827d6a |  | nvd |
|  |  | https://git.kernel.org/stable/c/89a906dfa8c3b21b3e5360f73c49234ac1eb885b |  | nvd |
|  |  | https://git.kernel.org/stable/c/9fc60f2bdd43e758bdf0305c0fc83221419ddb3f |  | nvd |
|  |  | https://git.kernel.org/stable/c/cd595d87e5fdd2fc09ea69359aa85e7f12f4b97b |  | nvd |

</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: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---
 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-24.03-LTS(6.6.0):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):不受影响
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(6.12.0):不受影响
6.openEuler-24.03-LTS-Next(6.6.0):不受影响
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响
8.openEuler-24.03-LTS-SP2(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-SP3(5.10.0):否
3.master(6.12.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4(5.10.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(6.6.0):否

原因说明：
  1.openEuler-24.03-LTS(6.6.0):正常修复
2.master(6.12.0):不受影响-漏洞代码不能被攻击者触发
3.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
5.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
6.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在
8.openEuler-24.03-LTS-SP2(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-2025-1629

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