CVE-2024-50296 (GCVE-0-2024-50296)
Vulnerability from cvelistv5
Published
2024-11-19 01:30
Modified
2026-05-23 15:55
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix kernel crash when uninstalling driver When the driver is uninstalled and the VF is disabled concurrently, a kernel crash occurs. The reason is that the two actions call function pci_disable_sriov(). The num_VFs is checked to determine whether to release the corresponding resources. During the second calling, num_VFs is not 0 and the resource release function is called. However, the corresponding resource has been released during the first invoking. Therefore, the problem occurs: [15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... [15278.131557][T50670] Call trace: [15278.134686][T50670] klist_put+0x28/0x12c [15278.138682][T50670] klist_del+0x14/0x20 [15278.142592][T50670] device_del+0xbc/0x3c0 [15278.146676][T50670] pci_remove_bus_device+0x84/0x120 [15278.151714][T50670] pci_stop_and_remove_bus_device+0x6c/0x80 [15278.157447][T50670] pci_iov_remove_virtfn+0xb4/0x12c [15278.162485][T50670] sriov_disable+0x50/0x11c [15278.166829][T50670] pci_disable_sriov+0x24/0x30 [15278.171433][T50670] hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3] [15278.178039][T50670] hclge_exit+0x28/0xd0 [hclge] [15278.182730][T50670] __se_sys_delete_module.isra.0+0x164/0x230 [15278.188550][T50670] __arm64_sys_delete_module+0x1c/0x30 [15278.193848][T50670] invoke_syscall+0x50/0x11c [15278.198278][T50670] el0_svc_common.constprop.0+0x158/0x164 [15278.203837][T50670] do_el0_svc+0x34/0xcc [15278.207834][T50670] el0_svc+0x20/0x30 For details, see the following figure. rmmod hclge disable VFs ---------------------------------------------------- hclge_exit() sriov_numvfs_store() ... device_lock() pci_disable_sriov() hns3_pci_sriov_configure() pci_disable_sriov() sriov_disable() sriov_disable() if !num_VFs : if !num_VFs : return; return; sriov_del_vfs() sriov_del_vfs() ... ... klist_put() klist_put() ... ... num_VFs = 0; num_VFs = 0; device_unlock(); In this patch, when driver is removing, we get the device_lock() to protect num_VFs, just like sriov_numvfs_store().
Impacted products
Vendor Product Version
Linux Linux Version: b06ad258e01389ca3ff13bc180f3fcd6a608f1cd
Version: c4b64011e458aa2b246cd4e42012cfd83d2d9a5c
Version: d36b15e3e7b5937cb1f6ac590a85facc3a320642
Version: 0dd8a25f355b4df2d41c08df1716340854c7d4c5
Version: 0dd8a25f355b4df2d41c08df1716340854c7d4c5
Version: 0dd8a25f355b4df2d41c08df1716340854c7d4c5
Version: 0dd8a25f355b4df2d41c08df1716340854c7d4c5
Version: 0dd8a25f355b4df2d41c08df1716340854c7d4c5
Version: 9b5a29f0acefa3eb1dbe2fa302b393eeff64d933
Version: 4.19.214   
Version: 5.4.156   
Version: 5.10.76   
Version: 5.14.15   
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Show details on NVD website


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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix kernel crash when uninstalling driver\n\nWhen the driver is uninstalled and the VF is disabled concurrently, a\nkernel crash occurs. The reason is that the two actions call function\npci_disable_sriov(). The num_VFs is checked to determine whether to\nrelease the corresponding resources. During the second calling, num_VFs\nis not 0 and the resource release function is called. However, the\ncorresponding resource has been released during the first invoking.\nTherefore, the problem occurs:\n\n[15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\n...\n[15278.131557][T50670] Call trace:\n[15278.134686][T50670]  klist_put+0x28/0x12c\n[15278.138682][T50670]  klist_del+0x14/0x20\n[15278.142592][T50670]  device_del+0xbc/0x3c0\n[15278.146676][T50670]  pci_remove_bus_device+0x84/0x120\n[15278.151714][T50670]  pci_stop_and_remove_bus_device+0x6c/0x80\n[15278.157447][T50670]  pci_iov_remove_virtfn+0xb4/0x12c\n[15278.162485][T50670]  sriov_disable+0x50/0x11c\n[15278.166829][T50670]  pci_disable_sriov+0x24/0x30\n[15278.171433][T50670]  hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3]\n[15278.178039][T50670]  hclge_exit+0x28/0xd0 [hclge]\n[15278.182730][T50670]  __se_sys_delete_module.isra.0+0x164/0x230\n[15278.188550][T50670]  __arm64_sys_delete_module+0x1c/0x30\n[15278.193848][T50670]  invoke_syscall+0x50/0x11c\n[15278.198278][T50670]  el0_svc_common.constprop.0+0x158/0x164\n[15278.203837][T50670]  do_el0_svc+0x34/0xcc\n[15278.207834][T50670]  el0_svc+0x20/0x30\n\nFor details, see the following figure.\n\n     rmmod hclge              disable VFs\n----------------------------------------------------\nhclge_exit()            sriov_numvfs_store()\n  ...                     device_lock()\n  pci_disable_sriov()     hns3_pci_sriov_configure()\n                            pci_disable_sriov()\n                              sriov_disable()\n    sriov_disable()             if !num_VFs :\n      if !num_VFs :               return;\n        return;                 sriov_del_vfs()\n      sriov_del_vfs()             ...\n        ...                       klist_put()\n        klist_put()               ...\n        ...                     num_VFs = 0;\n      num_VFs = 0;        device_unlock();\n\nIn this patch, when driver is removing, we get the device_lock()\nto protect num_VFs, just like sriov_numvfs_store()."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:55:00.827Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d"
        },
        {
          "url": "https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09"
        },
        {
          "url": "https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d"
        },
        {
          "url": "https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5"
        },
        {
          "url": "https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18"
        }
      ],
      "title": "net: hns3: fix kernel crash when uninstalling driver",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50296",
    "datePublished": "2024-11-19T01:30:43.318Z",
    "dateReserved": "2024-10-21T19:36:19.986Z",
    "dateUpdated": "2026-05-23T15:55:00.827Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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