CVE-2024-46785

一、漏洞信息
 漏洞编号：[CVE-2024-46785](https://nvd.nist.gov/vuln/detail/CVE-2024-46785)
 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 None
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:eventfs: Use list_del_rcu() for SRCU protected list variableChi Zhiling reported:  We found a null pointer accessing in tracefs[1], the reason is that the  variable  ei_child  is set to LIST_POISON1, that means the list was  removed in eventfs_remove_rec. so when access the ei_child->is_freed, the  panic triggered.  by the way, the following script can reproduce this panic  loop1 (){      while true      do          echo  p:kp submit_bio  > /sys/kernel/debug/tracing/kprobe_events          echo    > /sys/kernel/debug/tracing/kprobe_events      done  }  loop2 (){      while true      do          tree /sys/kernel/debug/tracing/events/kprobes/      done  }  loop1 &  loop2  [1]:  [ 1147.959632][T17331] Unable to handle kernel paging request at virtual address dead000000000150  [ 1147.968239][T17331] Mem abort info:  [ 1147.971739][T17331]   ESR = 0x0000000096000004  [ 1147.976172][T17331]   EC = 0x25: DABT (current EL), IL = 32 bits  [ 1147.982171][T17331]   SET = 0, FnV = 0  [ 1147.985906][T17331]   EA = 0, S1PTW = 0  [ 1147.989734][T17331]   FSC = 0x04: level 0 translation fault  [ 1147.995292][T17331] Data abort info:  [ 1147.998858][T17331]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000  [ 1148.005023][T17331]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0  [ 1148.010759][T17331]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0  [ 1148.016752][T17331] [dead000000000150] address between user and kernel address ranges  [ 1148.024571][T17331] Internal error: Oops: 0000000096000004 [#1] SMP  [ 1148.030825][T17331] Modules linked in: team_mode_loadbalance team nlmon act_gact cls_flower sch_ingress bonding tls macvlan dummy ib_core bridge stp llc veth amdgpu amdxcp mfd_core gpu_sched drm_exec drm_buddy radeon crct10dif_ce video drm_suballoc_helper ghash_ce drm_ttm_helper sha2_ce ttm sha256_arm64 i2c_algo_bit sha1_ce sbsa_gwdt cp210x drm_display_helper cec sr_mod cdrom drm_kms_helper binfmt_misc sg loop fuse drm dm_mod nfnetlink ip_tables autofs4 [last unloaded: tls]  [ 1148.072808][T17331] CPU: 3 PID: 17331 Comm: ls Tainted: G        W         ------- ----  6.6.43 #2  [ 1148.081751][T17331] Source Version: 21b3b386e948bedd29369af66f3e98ab01b1c650  [ 1148.088783][T17331] Hardware name: Greatwall GW-001M1A-FTF/GW-001M1A-FTF, BIOS KunLun BIOS V4.0 07/16/2020  [ 1148.098419][T17331] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)  [ 1148.106060][T17331] pc : eventfs_iterate+0x2c0/0x398  [ 1148.111017][T17331] lr : eventfs_iterate+0x2fc/0x398  [ 1148.115969][T17331] sp : ffff80008d56bbd0  [ 1148.119964][T17331] x29: ffff80008d56bbf0 x28: ffff001ff5be2600 x27: 0000000000000000  [ 1148.127781][T17331] x26: ffff001ff52ca4e0 x25: 0000000000009977 x24: dead000000000100  [ 1148.135598][T17331] x23: 0000000000000000 x22: 000000000000000b x21: ffff800082645f10  [ 1148.143415][T17331] x20: ffff001fddf87c70 x19: ffff80008d56bc90 x18: 0000000000000000  [ 1148.151231][T17331] x17: 0000000000000000 x16: 0000000000000000 x15: ffff001ff52ca4e0  [ 1148.159048][T17331] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000  [ 1148.166864][T17331] x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000804391d0  [ 1148.174680][T17331] x8 : 0000000180000000 x7 : 0000000000000018 x6 : 0000aaab04b92862  [ 1148.182498][T17331] x5 : 0000aaab04b92862 x4 : 0000000080000000 x3 : 0000000000000068  [ 1148.190314][T17331] x2 : 000000000000000f x1 : 0000000000007ea8 x0 : 0000000000000001  [ 1148.198131][T17331] Call trace:  [ 1148.201259][T17331]  eventfs_iterate+0x2c0/0x398  [ 1148.205864][T17331]  iterate_dir+0x98/0x188  [ 1148.210036][T17331]  __arm64_sys_getdents64+0x78/0x160  [ 1148.215161][T17331]  invoke_syscall+0x78/0x108  [ 1148.219593][T17331]  el0_svc_common.constprop.0+0x48/0xf0  [ 1148.224977][T17331]  do_el0_svc+0x24/0x38  [ 1148.228974][T17331]  el0_svc+0x40/0x168  [ 1148.232798][T17---truncated---
 漏洞公开时间：2024-09-18 16:15:05
 漏洞创建时间：2024-09-19 01:12:19
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-46785
<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/05e08297c3c298d8ec28e5a5adb55840312dd87e |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/d2603279c7d645bf0d11fa253b23f1ab48fc8d3c |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f579d17a86448779f9642ad8baca6e3036a8e2d6 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-46785 | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-46785 | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://git.kernel.org/stable/c/05e08297c3c298d8ec28e5a5adb55840312dd87e | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://git.kernel.org/stable/c/d2603279c7d645bf0d11fa253b23f1ab48fc8d3c | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://git.kernel.org/stable/c/f579d17a86448779f9642ad8baca6e3036a8e2d6 | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-46785.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2313133 | https://bugzilla.suse.com/show_bug.cgi?id=1230811 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-46785 |

</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:eventfs: Use list_del_rcu() for SRCU protected list variableChi Zhiling reported:  We found a null pointer accessing in tracefs[1], the reason is that the  variable &#39;ei_child&#39; is set to LIST_POISON1, that means the list was  removed in eventfs_remove_rec. so when access the ei_child-&gt;is_freed, the  panic triggered.  by the way, the following script can reproduce this panic  loop1 (){      while true      do          echo &#34;p:kp submit_bio&#34; &gt; /sys/kernel/debug/tracing/kprobe_events          echo &#34;&#34; &gt; /sys/kernel/debug/tracing/kprobe_events      done  }  loop2 (){      while true      do          tree /sys/kernel/debug/tracing/events/kprobes/      done  }  loop1 &#38;  loop2  [1]:  [ 1147.959632][T17331] Unable to handle kernel paging request at virtual address dead000000000150  [ 1147.968239][T17331] Mem abort info:  [ 1147.971739][T17331]   ESR = 0x0000000096000004  [ 1147.976172][T17331]   EC = 0x25: DABT (current EL), IL = 32 bits  [ 1147.982171][T17331]   SET = 0, FnV = 0  [ 1147.985906][T17331]   EA = 0, S1PTW = 0  [ 1147.989734][T17331]   FSC = 0x04: level 0 translation fault  [ 1147.995292][T17331] Data abort info:  [ 1147.998858][T17331]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000  [ 1148.005023][T17331]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0  [ 1148.010759][T17331]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0  [ 1148.016752][T17331] [dead000000000150] address between user and kernel address ranges  [ 1148.024571][T17331] Internal error: Oops: 0000000096000004 [#1] SMP  [ 1148.030825][T17331] Modules linked in: team_mode_loadbalance team nlmon act_gact cls_flower sch_ingress bonding tls macvlan dummy ib_core bridge stp llc veth amdgpu amdxcp mfd_core gpu_sched drm_exec drm_buddy radeon crct10dif_ce video drm_suballoc_helper ghash_ce drm_ttm_helper sha2_ce ttm sha256_arm64 i2c_algo_bit sha1_ce sbsa_gwdt cp210x drm_display_helper cec sr_mod cdrom drm_kms_helper binfmt_misc sg loop fuse drm dm_mod nfnetlink ip_tables autofs4 [last unloaded: tls]  [ 1148.072808][T17331] CPU: 3 PID: 17331 Comm: ls Tainted: G        W         ------- ----  6.6.43 #2  [ 1148.081751][T17331] Source Version: 21b3b386e948bedd29369af66f3e98ab01b1c650  [ 1148.088783][T17331] Hardware name: Greatwall GW-001M1A-FTF/GW-001M1A-FTF, BIOS KunLun BIOS V4.0 07/16/2020  [ 1148.098419][T17331] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)  [ 1148.106060][T17331] pc : eventfs_iterate+0x2c0/0x398  [ 1148.111017][T17331] lr : eventfs_iterate+0x2fc/0x398  [ 1148.115969][T17331] sp : ffff80008d56bbd0  [ 1148.119964][T17331] x29: ffff80008d56bbf0 x28: ffff001ff5be2600 x27: 0000000000000000  [ 1148.127781][T17331] x26: ffff001ff52ca4e0 x25: 0000000000009977 x24: dead000000000100  [ 1148.135598][T17331] x23: 0000000000000000 x22: 000000000000000b x21: ffff800082645f10  [ 1148.143415][T17331] x20: ffff001fddf87c70 x19: ffff80008d56bc90 x18: 0000000000000000  [ 1148.151231][T17331] x17: 0000000000000000 x16: 0000000000000000 x15: ffff001ff52ca4e0  [ 1148.159048][T17331] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000  [ 1148.166864][T17331] x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000804391d0  [ 1148.174680][T17331] x8 : 0000000180000000 x7 : 0000000000000018 x6 : 0000aaab04b92862  [ 1148.182498][T17331] x5 : 0000aaab04b92862 x4 : 0000000080000000 x3 : 0000000000000068  [ 1148.190314][T17331] x2 : 000000000000000f x1 : 0000000000007ea8 x0 : 0000000000000001  [ 1148.198131][T17331] Call trace:  [ 1148.201259][T17331]  eventfs_iterate+0x2c0/0x398  [ 1148.205864][T17331]  iterate_dir+0x98/0x188  [ 1148.210036][T17331]  __arm64_sys_getdents64+0x78/0x160  [ 1148.215161][T17331]  invoke_syscall+0x78/0x108  [ 1148.219593][T17331]  el0_svc_common.constprop.0+0x48/0xf0  [ 1148.224977][T17331]  do_el0_svc+0x24/0x38  [ 1148.228974][T17331]  el0_svc+0x40/0x168  [ 1148.232798][T17331]  el0t_64_sync_handler+0x120/0x130  [ 1148.237836][T17331]  el0t_64_sync+0x1a4/0x1a8  [ 1148.242182][T17331] Code: 54ffff6c f9400
 openEuler评分：
  4.8
 Vector：CVSS：2.0/AV:A/AC:H/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-SP1(5.10.0):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
6.master(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

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-2181

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