CVE-2024-50082

一、漏洞信息
 漏洞编号：[CVE-2024-50082](https://nvd.nist.gov/vuln/detail/CVE-2024-50082)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：4.7 Medium
  Vector：CVSS：3.0/AV:L/AC:H/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:blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function raceWe re seeing crashes from rq_qos_wake_function that look like this:  BUG: unable to handle page fault for address: ffffafe180a40084  #PF: supervisor write access in kernel mode  #PF: error_code(0x0002) - not-present page  PGD 100000067 P4D 100000067 PUD 10027c067 PMD 10115d067 PTE 0  Oops: Oops: 0002 [#1] PREEMPT SMP PTI  CPU: 17 UID: 0 PID: 0 Comm: swapper/17 Not tainted 6.12.0-rc3-00013-geca631b8fe80 #11  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014  RIP: 0010:_raw_spin_lock_irqsave+0x1d/0x40  Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 54 9c 41 5c fa 65 ff 05 62 97 30 4c 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 0a 4c 89 e0 41 5c c3 cc cc cc cc 89 c6 e8 2c 0b 00  RSP: 0018:ffffafe180580ca0 EFLAGS: 00010046  RAX: 0000000000000000 RBX: ffffafe180a3f7a8 RCX: 0000000000000011  RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffafe180a40084  RBP: 0000000000000000 R08: 00000000001e7240 R09: 0000000000000011  R10: 0000000000000028 R11: 0000000000000888 R12: 0000000000000002  R13: ffffafe180a40084 R14: 0000000000000000 R15: 0000000000000003  FS:  0000000000000000(0000) GS:ffff9aaf1f280000(0000) knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: ffffafe180a40084 CR3: 000000010e428002 CR4: 0000000000770ef0  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400  PKRU: 55555554  Call Trace:   <IRQ>   try_to_wake_up+0x5a/0x6a0   rq_qos_wake_function+0x71/0x80   __wake_up_common+0x75/0xa0   __wake_up+0x36/0x60   scale_up.part.0+0x50/0x110   wb_timer_fn+0x227/0x450   ...So rq_qos_wake_function() calls wake_up_process(data->task), which callstry_to_wake_up(), which faults in raw_spin_lock_irqsave(&p->pi_lock).p comes from data->task, and data comes from the waitqueue entry, whichis stored on the waiter s stack in rq_qos_wait(). Analyzing the coredump with drgn, I found that the waiter had already woken up and movedon to a completely unrelated code path, clobbering what was previouslydata->task. Meanwhile, the waker was passing the clobbered garbage indata->task to wake_up_process(), leading to the crash.What s happening is that in between rq_qos_wake_function() deleting thewaitqueue entry and calling wake_up_process(), rq_qos_wait() is findingthat it already got a token and returning. The race looks like this:rq_qos_wait()                           rq_qos_wake_function()==============================================================prepare_to_wait_exclusive()                                        data->got_token = true;                                        list_del_init(&curr->entry);if (data.got_token)        break;finish_wait(&rqw->wait, &data.wq);  ^- returns immediately because     list_empty_careful(&wq_entry->entry)     is true... return, go do something else ...                                        wake_up_process(data->task)                                          (NO LONGER VALID!)-^Normally, finish_wait() is supposed to synchronize against the waker.But, as noted above, it is returning immediately because the waitqueueentry has already been removed from the waitqueue.The bug is that rq_qos_wake_function() is accessing the waitqueue entryAFTER deleting it. Note that autoremove_wake_function() wakes the waiterand THEN deletes the waitqueue entry, which is the proper order.Fix it by swapping the order. We also need to uselist_del_init_careful() to match the list_empty_careful() infinish_wait().
 漏洞公开时间：2024-10-29 09:15:05
 漏洞创建时间：2024-10-29 09:29:11
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-50082
<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/04f283fc16c8d5db641b6bffd2d8310aa7eccebc |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/3bc6d0f8b70a9101456cf02ab99acb75254e1852 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/455a469758e57a6fe070e3e342db12e4a629e0eb |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/4c5b123ab289767afe940389dbb963c5c05e594e |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b5e900a3612b69423a0e1b0ab67841a1fb4af80f |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/d04b72c9ef2b0689bfc1057d21c4aeed087c329f |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e972b08b91ef48488bae9789f03cfedb148667fb |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-50082 | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-50082 | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/04f283fc16c8d5db641b6bffd2d8310aa7eccebc | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/3bc6d0f8b70a9101456cf02ab99acb75254e1852 | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/455a469758e57a6fe070e3e342db12e4a629e0eb | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/4c5b123ab289767afe940389dbb963c5c05e594e | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/b5e900a3612b69423a0e1b0ab67841a1fb4af80f | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/stable/c/e972b08b91ef48488bae9789f03cfedb148667fb | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-50082.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1232500 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024102937-CVE-2024-50082-c5b1@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2322308 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:10944 | https://bugzilla.redhat.com/show_bug.cgi?id=2322308 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:10943 | https://bugzilla.redhat.com/show_bug.cgi?id=2322308 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-50082 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2024-50082 |
| cve_search |  | https://git.kernel.org/stable/c/3bc6d0f8b70a9101456cf02ab99acb75254e1852 |
| cve_search |  | https://git.kernel.org/stable/c/455a469758e57a6fe070e3e342db12e4a629e0eb |
| cve_search |  | https://git.kernel.org/stable/c/b5e900a3612b69423a0e1b0ab67841a1fb4af80f |
| cve_search |  | https://git.kernel.org/stable/c/4c5b123ab289767afe940389dbb963c5c05e594e |
| cve_search |  | https://git.kernel.org/stable/c/04f283fc16c8d5db641b6bffd2d8310aa7eccebc |
| cve_search |  | https://git.kernel.org/stable/c/e972b08b91ef48488bae9789f03cfedb148667fb |

</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>

| 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/04f283fc16c8d5db641b6bffd2d8310aa7eccebc |  | nvd |
|  |  | https://git.kernel.org/stable/c/3bc6d0f8b70a9101456cf02ab99acb75254e1852 |  | nvd |
|  |  | https://git.kernel.org/stable/c/455a469758e57a6fe070e3e342db12e4a629e0eb |  | nvd |
|  |  | https://git.kernel.org/stable/c/4c5b123ab289767afe940389dbb963c5c05e594e |  | nvd |
|  |  | https://git.kernel.org/stable/c/b5e900a3612b69423a0e1b0ab67841a1fb4af80f |  | nvd |
|  |  | https://git.kernel.org/stable/c/e972b08b91ef48488bae9789f03cfedb148667fb |  | nvd |
| linux_kernel | 5.10.228 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3bc6d0f8b70aIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |
| linux_kernel | 5.15.169 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=455a469758e5Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |
| linux_kernel | 6.1.114 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b5e900a3612bIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |
| linux_kernel | 6.6.58 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4c5b123ab289Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |
| linux_kernel | 6.11.5 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=04f283fc16c8Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |
| linux_kernel | 6.12-rc4 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e972b08b91efPlease | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38cfb5a45ee0 | linuxkernelcves |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  Reserved.
 openEuler评分：
  4.7
 Vector：CVSS：3.0/AV:L/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-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.openEuler-24.03-LTS-SP1(6.6.0):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
8.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
  1.openEuler-22.03-LTS-SP3(5.10.0):正常修复
2.openEuler-22.03-LTS-SP4(5.10.0):正常修复
3.openEuler-24.03-LTS(6.6.0):正常修复
4.openEuler-24.03-LTS-SP1(6.6.0):正常修复
5.openEuler-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
6.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-2426

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