CVE-2024-50037

一、漏洞信息
 漏洞编号：[CVE-2024-50037](https://nvd.nist.gov/vuln/detail/CVE-2024-50037)
 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:drm/fbdev-dma: Only cleanup deferred I/O if necessaryCommit 5a498d4d06d6 ( drm/fbdev-dma: Only install deferred I/O ifnecessary ) initializes deferred I/O only if it is used.drm_fbdev_dma_fb_destroy() however calls fb_deferred_io_cleanup()unconditionally with struct fb_info.fbdefio == NULL. KASAN with theout-of-tree Apple silicon display driver posts following warning from__flush_work() of a random struct work_struct instead of the expectedNULL pointer derefs.[   22.053799] ------------[ cut here ]------------[   22.054832] WARNING: CPU: 2 PID: 1 at kernel/workqueue.c:4177 __flush_work+0x4d8/0x580[   22.056597] Modules linked in: uhid bnep uinput nls_ascii ip6_tables ip_tables i2c_dev loop fuse dm_multipath nfnetlink zram hid_magicmouse btrfs xor xor_neon brcmfmac_wcc raid6_pq hci_bcm4377 bluetooth brcmfmac hid_apple brcmutil nvmem_spmi_mfd simple_mfd_spmi dockchannel_hid cfg80211 joydev regmap_spmi nvme_apple ecdh_generic ecc macsmc_hid rfkill dwc3 appledrm snd_soc_macaudio macsmc_power nvme_core apple_isp phy_apple_atc apple_sart apple_rtkit_helper apple_dockchannel tps6598x macsmc_hwmon snd_soc_cs42l84 videobuf2_v4l2 spmi_apple_controller nvmem_apple_efuses videobuf2_dma_sg apple_z2 videobuf2_memops spi_nor panel_summit videobuf2_common asahi videodev pwm_apple apple_dcp snd_soc_apple_mca apple_admac spi_apple clk_apple_nco i2c_pasemi_platform snd_pcm_dmaengine mc i2c_pasemi_core mux_core ofpart adpdrm drm_dma_helper apple_dart apple_soc_cpufreq leds_pwm phram[   22.073768] CPU: 2 UID: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.11.2-asahi+ #asahi-dev[   22.075612] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)[   22.077032] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)[   22.078567] pc : __flush_work+0x4d8/0x580[   22.079471] lr : __flush_work+0x54/0x580[   22.080345] sp : ffffc000836ef820[   22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128[   22.082678] x26: dfffc00000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358[   22.084263] x23: ffff80004b7862b8 x22: dfffc00000000000 x21: ffff80005aa1d470[   22.085855] x20: ffff80004b786000 x19: ffff80004b7862a0 x18: 0000000000000000[   22.087439] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005[   22.089030] x14: 1ffff800106ddf0a x13: 0000000000000000 x12: 0000000000000000[   22.090618] x11: ffffb800106ddf0f x10: dfffc00000000000 x9 : 1ffff800106ddf0e[   22.092206] x8 : 0000000000000000 x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000001[   22.093790] x5 : ffffc000836ef728 x4 : 0000000000000000 x3 : 0000000000000020[   22.095368] x2 : 0000000000000008 x1 : 00000000000000aa x0 : 0000000000000000[   22.096955] Call trace:[   22.097505]  __flush_work+0x4d8/0x580[   22.098330]  flush_delayed_work+0x80/0xb8[   22.099231]  fb_deferred_io_cleanup+0x3c/0x130[   22.100217]  drm_fbdev_dma_fb_destroy+0x6c/0xe0 [drm_dma_helper][   22.101559]  unregister_framebuffer+0x210/0x2f0[   22.102575]  drm_fb_helper_unregister_info+0x48/0x60[   22.103683]  drm_fbdev_dma_client_unregister+0x4c/0x80 [drm_dma_helper][   22.105147]  drm_client_dev_unregister+0x1cc/0x230[   22.106217]  drm_dev_unregister+0x58/0x570[   22.107125]  apple_drm_unbind+0x50/0x98 [appledrm][   22.108199]  component_del+0x1f8/0x3a8[   22.109042]  dcp_platform_shutdown+0x24/0x38 [apple_dcp][   22.110357]  platform_shutdown+0x70/0x90[   22.111219]  device_shutdown+0x368/0x4d8[   22.112095]  kernel_restart+0x6c/0x1d0[   22.112946]  __arm64_sys_reboot+0x1c8/0x328[   22.113868]  invoke_syscall+0x78/0x1a8[   22.114703]  do_el0_svc+0x124/0x1a0[   22.115498]  el0_svc+0x3c/0xe0[   22.116181]  el0t_64_sync_handler+0x70/0xc0[   22.117110]  el0t_64_sync+0x190/0x198[   22.117931] ---[ end trace 0000000000000000 ]---
 漏洞公开时间：2024-10-22 04:15:16
 漏洞创建时间：2024-10-22 08:07:21
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-50037
<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/5a4a8ea14c54c651ec532a480bd560d0c6e52f3d |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fcddc71ec7ecf15b4df3c41288c9cf0b8e886111 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-50037 | https://bugzilla.suse.com/show_bug.cgi?id=1231911 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-50037 | https://bugzilla.suse.com/show_bug.cgi?id=1231911 |
| suse_bugzilla | https://git.kernel.org/stable/c/5a4a8ea14c54c651ec532a480bd560d0c6e52f3d | https://bugzilla.suse.com/show_bug.cgi?id=1231911 |
| suse_bugzilla | https://git.kernel.org/stable/c/fcddc71ec7ecf15b4df3c41288c9cf0b8e886111 | https://bugzilla.suse.com/show_bug.cgi?id=1231911 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-50037.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1231911 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024102132-CVE-2024-50037-770e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2320634 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-50037 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2024-50037 |

</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/5a4a8ea14c54c651ec532a480bd560d0c6e52f3d |  | nvd |
|  |  | https://git.kernel.org/stable/c/fcddc71ec7ecf15b4df3c41288c9cf0b8e886111 |  | 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:drm/fbdev-dma: Only cleanup deferred I/O if necessaryCommit 5a498d4d06d6 ( drm/fbdev-dma: Only install deferred I/O ifnecessary ) initializes deferred I/O only if it is used.drm_fbdev_dma_fb_destroy() however calls fb_deferred_io_cleanup()unconditionally with struct fb_info.fbdefio == NULL. KASAN with theout-of-tree Apple silicon display driver posts following warning from__flush_work() of a random struct work_struct instead of the expectedNULL pointer derefs.[   22.053799] ------------[ cut here ]------------[   22.054832] WARNING: CPU: 2 PID: 1 at kernel/workqueue.c:4177 __flush_work+0x4d8/0x580[   22.056597] Modules linked in: uhid bnep uinput nls_ascii ip6_tables ip_tables i2c_dev loop fuse dm_multipath nfnetlink zram hid_magicmouse btrfs xor xor_neon brcmfmac_wcc raid6_pq hci_bcm4377 bluetooth brcmfmac hid_apple brcmutil nvmem_spmi_mfd simple_mfd_spmi dockchannel_hid cfg80211 joydev regmap_spmi nvme_apple ecdh_generic ecc macsmc_hid rfkill dwc3 appledrm snd_soc_macaudio macsmc_power nvme_core apple_isp phy_apple_atc apple_sart apple_rtkit_helper apple_dockchannel tps6598x macsmc_hwmon snd_soc_cs42l84 videobuf2_v4l2 spmi_apple_controller nvmem_apple_efuses videobuf2_dma_sg apple_z2 videobuf2_memops spi_nor panel_summit videobuf2_common asahi videodev pwm_apple apple_dcp snd_soc_apple_mca apple_admac spi_apple clk_apple_nco i2c_pasemi_platform snd_pcm_dmaengine mc i2c_pasemi_core mux_core ofpart adpdrm drm_dma_helper apple_dart apple_soc_cpufreq leds_pwm phram[   22.073768] CPU: 2 UID: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.11.2-asahi+ #asahi-dev[   22.075612] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)[   22.077032] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)[   22.078567] pc : __flush_work+0x4d8/0x580[   22.079471] lr : __flush_work+0x54/0x580[   22.080345] sp : ffffc000836ef820[   22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128[   22.082678] x26: dfffc00000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358[   22.084263] x23: ffff80004b7862b8 x22: dfffc00000000000 x21: ffff80005aa1d470[   22.085855] x20: ffff80004b786000 x19: ffff80004b7862a0 x18: 0000000000000000[   22.087439] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005[   22.089030] x14: 1ffff800106ddf0a x13: 0000000000000000 x12: 0000000000000000[   22.090618] x11: ffffb800106ddf0f x10: dfffc00000000000 x9 : 1ffff800106ddf0e[   22.092206] x8 : 0000000000000000 x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000001[   22.093790] x5 : ffffc000836ef728 x4 : 0000000000000000 x3 : 0000000000000020[   22.095368] x2 : 0000000000000008 x1 : 00000000000000aa x0 : 0000000000000000[   22.096955] Call trace:[   22.097505]  __flush_work+0x4d8/0x580[   22.098330]  flush_delayed_work+0x80/0xb8[   22.099231]  fb_deferred_io_cleanup+0x3c/0x130[   22.100217]  drm_fbdev_dma_fb_destroy+0x6c/0xe0 [drm_dma_helper][   22.101559]  unregister_framebuffer+0x210/0x2f0[   22.102575]  drm_fb_helper_unregister_info+0x48/0x60[   22.103683]  drm_fbdev_dma_client_unregister+0x4c/0x80 [drm_dma_helper][   22.105147]  drm_client_dev_unregister+0x1cc/0x230[   22.106217]  drm_dev_unregister+0x58/0x570[   22.107125]  apple_drm_unbind+0x50/0x98 [appledrm][   22.108199]  component_del+0x1f8/0x3a8[   22.109042]  dcp_platform_shutdown+0x24/0x38 [apple_dcp][   22.110357]  platform_shutdown+0x70/0x90[   22.111219]  device_shutdown+0x368/0x4d8[   22.112095]  kernel_restart+0x6c/0x1d0[   22.112946]  __arm64_sys_reboot+0x1c8/0x328[   22.113868]  invoke_syscall+0x78/0x1a8[   22.114703]  do_el0_svc+0x124/0x1a0[   22.115498]  el0_svc+0x3c/0xe0[   22.116181]  el0t_64_sync_handler+0x70/0xc0[   22.117110]  el0t_64_sync+0x190/0x198[   22.117931] ---[ end trace 0000000000000000 ]---
 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-20.03-LTS-SP4(4.19.90):不受影响
2.openEuler-22.03-LTS-SP1(5.10.0):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(6.6.0):不受影响
6.openEuler-24.03-LTS(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响
8.openEuler-24.03-LTS-SP1(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-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
2.openEuler-22.03-LTS-SP1(5.10.0):不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在
5.master(6.6.0):不受影响-漏洞代码不存在
6.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不存在
8.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

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