CVE-2024-40981

一、漏洞信息
 漏洞编号：[CVE-2024-40981](https://nvd.nist.gov/vuln/detail/CVE-2024-40981)
 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 Medium
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:batman-adv: bypass empty buckets in batadv_purge_orig_ref()Many syzbot reports are pointing to soft lockups inbatadv_purge_orig_ref() [1]Root cause is unknown, but we can avoid spending too muchtime there and perhaps get more interesting reports.[1]watchdog: BUG: soft lockup - CPU#0 stuck for 27s! [kworker/u4:6:621]Modules linked in:irq event stamp: 6182794 hardirqs last  enabled at (6182793): [<ffff8000801dae10>] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386 hardirqs last disabled at (6182794): [<ffff80008ad66a78>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (6182794): [<ffff80008ad66a78>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last  enabled at (6182792): [<ffff80008aab71c4>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last  enabled at (6182792): [<ffff80008aab71c4>] batadv_purge_orig_ref+0x114c/0x1228 net/batman-adv/originator.c:1287 softirqs last disabled at (6182790): [<ffff80008aab61dc>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (6182790): [<ffff80008aab61dc>] batadv_purge_orig_ref+0x164/0x1228 net/batman-adv/originator.c:1271CPU: 0 PID: 621 Comm: kworker/u4:6 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024Workqueue: bat_events batadv_purge_origpstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : should_resched arch/arm64/include/asm/preempt.h:79 [inline] pc : __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:388 lr : __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386sp : ffff800099007970x29: ffff800099007980 x28: 1fffe00018fce1bd x27: dfff800000000000x26: ffff0000d2620008 x25: ffff0000c7e70de8 x24: 0000000000000001x23: 1fffe00018e57781 x22: dfff800000000000 x21: ffff80008aab71c4x20: ffff0001b40136c0 x19: ffff0000c72bbc08 x18: 1fffe0001a817bb0x17: ffff800125414000 x16: ffff80008032116c x15: 0000000000000001x14: 1fffe0001ee9d610 x13: 0000000000000000 x12: 0000000000000003x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000x8 : 00000000005e5789 x7 : ffff80008aab61dc x6 : 0000000000000000x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000x2 : 0000000000000006 x1 : 0000000000000080 x0 : ffff800125414000Call trace:  __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline]  arch_local_irq_enable arch/arm64/include/asm/irqflags.h:49 [inline]  __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:386  __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]  _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210  spin_unlock_bh include/linux/spinlock.h:396 [inline]  batadv_purge_orig_ref+0x114c/0x1228 net/batman-adv/originator.c:1287  batadv_purge_orig+0x20/0x70 net/batman-adv/originator.c:1300  process_one_work+0x694/0x1204 kernel/workqueue.c:2633  process_scheduled_works kernel/workqueue.c:2706 [inline]  worker_thread+0x938/0xef4 kernel/workqueue.c:2787  kthread+0x288/0x310 kernel/kthread.c:388  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860Sending NMI from CPU 0 to CPUs 1:NMI backtrace for cpu 1CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:51 lr : default_idle_call+0xf8/0x128 kernel/sched/idle.c:103sp : ffff800093a17d30x29: ffff800093a17d30 x28: dfff800000000000 x27: 1ffff00012742fb4x26: ffff80008ec9d000 x25: 0000000000000000 x24: 0000000000000002x23: 1ffff00011d93a74 x22: ffff80008ec9d3a0 x21: 0000000000000000x20: ffff0000c19dbc00 x19: ffff8000802d0fd8 x18: 1fffe00036804396x17: ffff80008ec9d000 x16: ffff8000802d089c x15: 0000000000000001---truncated---
 漏洞公开时间：2024-07-12 21:15:19
 漏洞创建时间：2024-07-13 22:23:09
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-40981
<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：
                  In the Linux kernel, the following vulnerability has been resolved:batman-adv: bypass empty buckets in batadv_purge_orig_ref()Many syzbot reports are pointing to soft lockups inbatadv_purge_orig_ref() [1]Root cause is unknown, but we can avoid spending too muchtime there and perhaps get more interesting reports.[1]watchdog: BUG: soft lockup - CPU#0 stuck for 27s! [kworker/u4:6:621]Modules linked in:irq event stamp: 6182794 hardirqs last  enabled at (6182793): [&lt;ffff8000801dae10&gt;] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386 hardirqs last disabled at (6182794): [&lt;ffff80008ad66a78&gt;] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (6182794): [&lt;ffff80008ad66a78&gt;] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last  enabled at (6182792): [&lt;ffff80008aab71c4&gt;] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last  enabled at (6182792): [&lt;ffff80008aab71c4&gt;] batadv_purge_orig_ref+0x114c/0x1228 net/batman-adv/originator.c:1287 softirqs last disabled at (6182790): [&lt;ffff80008aab61dc&gt;] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (6182790): [&lt;ffff80008aab61dc&gt;] batadv_purge_orig_ref+0x164/0x1228 net/batman-adv/originator.c:1271CPU: 0 PID: 621 Comm: kworker/u4:6 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024Workqueue: bat_events batadv_purge_origpstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : should_resched arch/arm64/include/asm/preempt.h:79 [inline] pc : __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:388 lr : __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386sp : ffff800099007970x29: ffff800099007980 x28: 1fffe00018fce1bd x27: dfff800000000000x26: ffff0000d2620008 x25: ffff0000c7e70de8 x24: 0000000000000001x23: 1fffe00018e57781 x22: dfff800000000000 x21: ffff80008aab71c4x20: ffff0001b40136c0 x19: ffff0000c72bbc08 x18: 1fffe0001a817bb0x17: ffff800125414000 x16: ffff80008032116c x15: 0000000000000001x14: 1fffe0001ee9d610 x13: 0000000000000000 x12: 0000000000000003x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000x8 : 00000000005e5789 x7 : ffff80008aab61dc x6 : 0000000000000000x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000x2 : 0000000000000006 x1 : 0000000000000080 x0 : ffff800125414000Call trace:  __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline]  arch_local_irq_enable arch/arm64/include/asm/irqflags.h:49 [inline]  __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:386  __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]  _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210  spin_unlock_bh include/linux/spinlock.h:396 [inline]  batadv_purge_orig_ref+0x114c/0x1228 net/batman-adv/originator.c:1287  batadv_purge_orig+0x20/0x70 net/batman-adv/originator.c:1300  process_one_work+0x694/0x1204 kernel/workqueue.c:2633  process_scheduled_works kernel/workqueue.c:2706 [inline]  worker_thread+0x938/0xef4 kernel/workqueue.c:2787  kthread+0x288/0x310 kernel/kthread.c:388  ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860Sending NMI from CPU 0 to CPUs 1:NMI backtrace for cpu 1CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:51 lr : default_idle_call+0xf8/0x128 kernel/sched/idle.c:103sp : ffff800093a17d30x29: ffff800093a17d30 x28: dfff800000000000 x27: 1ffff00012742fb4x26: ffff80008ec9d000 x25: 0000000000000000 x24: 0000000000000002x23: 1ffff00011d93a74 x22: ffff80008ec9d3a0 x21: 0000000000000000x20: ffff0000c19dbc00 x19: ffff8000802d0fd8 x18: 1fffe00036804396x17: ffff80008ec9d000 x16: ffff8000802d089c x15: 0000000000000001x14: 1fffe00036805f10 x13: 0000000000000000 x12: 0000000000000003x11: 0000000000000001 x10: 0000000000000003 x9 : 0000000
 openEuler评分：
  5.5
 Vector：CVSS：2.0/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-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-24.03-LTS(6.6.0):受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
6.master(6.1.0):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(6.1.0):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-2024-1960

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