CVE-2021-47387 (GCVE-0-2021-47387)
Vulnerability from cvelistv5
Published
2024-05-21 15:03
Modified
2025-05-04 07:09
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: cpufreq: schedutil: Use kobject release() method to free sugov_tunables The struct sugov_tunables is protected by the kobject, so we can't free it directly. Otherwise we would get a call trace like this: ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x30 WARNING: CPU: 3 PID: 720 at lib/debugobjects.c:505 debug_print_object+0xb8/0x100 Modules linked in: CPU: 3 PID: 720 Comm: a.sh Tainted: G W 5.14.0-rc1-next-20210715-yocto-standard+ #507 Hardware name: Marvell OcteonTX CN96XX board (DT) pstate: 40400009 (nZcv daif +PAN -UAO -TCO BTYPE=--) pc : debug_print_object+0xb8/0x100 lr : debug_print_object+0xb8/0x100 sp : ffff80001ecaf910 x29: ffff80001ecaf910 x28: ffff00011b10b8d0 x27: ffff800011043d80 x26: ffff00011a8f0000 x25: ffff800013cb3ff0 x24: 0000000000000000 x23: ffff80001142aa68 x22: ffff800011043d80 x21: ffff00010de46f20 x20: ffff800013c0c520 x19: ffff800011d8f5b0 x18: 0000000000000010 x17: 6e6968207473696c x16: 5f72656d6974203a x15: 6570797420746365 x14: 6a626f2029302065 x13: 303378302f307830 x12: 2b6e665f72656d69 x11: ffff8000124b1560 x10: ffff800012331520 x9 : ffff8000100ca6b0 x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 0000000000000001 x5 : ffff800011d8c000 x4 : ffff800011d8c740 x3 : 0000000000000000 x2 : ffff0001108301c0 x1 : ab3c90eedf9c0f00 x0 : 0000000000000000 Call trace: debug_print_object+0xb8/0x100 __debug_check_no_obj_freed+0x1c0/0x230 debug_check_no_obj_freed+0x20/0x88 slab_free_freelist_hook+0x154/0x1c8 kfree+0x114/0x5d0 sugov_exit+0xbc/0xc0 cpufreq_exit_governor+0x44/0x90 cpufreq_set_policy+0x268/0x4a8 store_scaling_governor+0xe0/0x128 store+0xc0/0xf0 sysfs_kf_write+0x54/0x80 kernfs_fop_write_iter+0x128/0x1c0 new_sync_write+0xf0/0x190 vfs_write+0x2d4/0x478 ksys_write+0x74/0x100 __arm64_sys_write+0x24/0x30 invoke_syscall.constprop.0+0x54/0xe0 do_el0_svc+0x64/0x158 el0_svc+0x2c/0xb0 el0t_64_sync_handler+0xb0/0xb8 el0t_64_sync+0x198/0x19c irq event stamp: 5518 hardirqs last enabled at (5517): [<ffff8000100cbd7c>] console_unlock+0x554/0x6c8 hardirqs last disabled at (5518): [<ffff800010fc0638>] el1_dbg+0x28/0xa0 softirqs last enabled at (5504): [<ffff8000100106e0>] __do_softirq+0x4d0/0x6c0 softirqs last disabled at (5483): [<ffff800010049548>] irq_exit+0x1b0/0x1b8 So split the original sugov_tunables_free() into two functions, sugov_clear_global_tunables() is just used to clear the global_tunables and the new sugov_tunables_free() is used as kobj_type::release to release the sugov_tunables safely.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
Version: 9bdcb44e391da5c41b98573bf0305a0e0b1c9569
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47387",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-11T18:55:39.448369Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-11T18:55:51.627Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.003Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/cb4a53ba37532c861a5f3f22803391018a41849a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/cpufreq_schedutil.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cb4a53ba37532c861a5f3f22803391018a41849a",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "463c46705f321201090b69c4ad5da0cd2ce614c9",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "67c98e023135ff81b8d52998a6fdb8ca0c518d82",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "a7d4fc84404d45d72f4490417e8cc3efa4af93f1",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "8d62aec52a8c5b1d25a2364b243fcc5098a2ede9",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            },
            {
              "lessThan": "e5c6b312ce3cc97e90ea159446e6bfa06645364d",
              "status": "affected",
              "version": "9bdcb44e391da5c41b98573bf0305a0e0b1c9569",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/cpufreq_schedutil.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.285",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.71",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.14.*",
              "status": "unaffected",
              "version": "5.14.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.285",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.249",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.209",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.151",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.71",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14.10",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: schedutil: Use kobject release() method to free sugov_tunables\n\nThe struct sugov_tunables is protected by the kobject, so we can\u0027t free\nit directly. Otherwise we would get a call trace like this:\n  ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x30\n  WARNING: CPU: 3 PID: 720 at lib/debugobjects.c:505 debug_print_object+0xb8/0x100\n  Modules linked in:\n  CPU: 3 PID: 720 Comm: a.sh Tainted: G        W         5.14.0-rc1-next-20210715-yocto-standard+ #507\n  Hardware name: Marvell OcteonTX CN96XX board (DT)\n  pstate: 40400009 (nZcv daif +PAN -UAO -TCO BTYPE=--)\n  pc : debug_print_object+0xb8/0x100\n  lr : debug_print_object+0xb8/0x100\n  sp : ffff80001ecaf910\n  x29: ffff80001ecaf910 x28: ffff00011b10b8d0 x27: ffff800011043d80\n  x26: ffff00011a8f0000 x25: ffff800013cb3ff0 x24: 0000000000000000\n  x23: ffff80001142aa68 x22: ffff800011043d80 x21: ffff00010de46f20\n  x20: ffff800013c0c520 x19: ffff800011d8f5b0 x18: 0000000000000010\n  x17: 6e6968207473696c x16: 5f72656d6974203a x15: 6570797420746365\n  x14: 6a626f2029302065 x13: 303378302f307830 x12: 2b6e665f72656d69\n  x11: ffff8000124b1560 x10: ffff800012331520 x9 : ffff8000100ca6b0\n  x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 0000000000000001\n  x5 : ffff800011d8c000 x4 : ffff800011d8c740 x3 : 0000000000000000\n  x2 : ffff0001108301c0 x1 : ab3c90eedf9c0f00 x0 : 0000000000000000\n  Call trace:\n   debug_print_object+0xb8/0x100\n   __debug_check_no_obj_freed+0x1c0/0x230\n   debug_check_no_obj_freed+0x20/0x88\n   slab_free_freelist_hook+0x154/0x1c8\n   kfree+0x114/0x5d0\n   sugov_exit+0xbc/0xc0\n   cpufreq_exit_governor+0x44/0x90\n   cpufreq_set_policy+0x268/0x4a8\n   store_scaling_governor+0xe0/0x128\n   store+0xc0/0xf0\n   sysfs_kf_write+0x54/0x80\n   kernfs_fop_write_iter+0x128/0x1c0\n   new_sync_write+0xf0/0x190\n   vfs_write+0x2d4/0x478\n   ksys_write+0x74/0x100\n   __arm64_sys_write+0x24/0x30\n   invoke_syscall.constprop.0+0x54/0xe0\n   do_el0_svc+0x64/0x158\n   el0_svc+0x2c/0xb0\n   el0t_64_sync_handler+0xb0/0xb8\n   el0t_64_sync+0x198/0x19c\n  irq event stamp: 5518\n  hardirqs last  enabled at (5517): [\u003cffff8000100cbd7c\u003e] console_unlock+0x554/0x6c8\n  hardirqs last disabled at (5518): [\u003cffff800010fc0638\u003e] el1_dbg+0x28/0xa0\n  softirqs last  enabled at (5504): [\u003cffff8000100106e0\u003e] __do_softirq+0x4d0/0x6c0\n  softirqs last disabled at (5483): [\u003cffff800010049548\u003e] irq_exit+0x1b0/0x1b8\n\nSo split the original sugov_tunables_free() into two functions,\nsugov_clear_global_tunables() is just used to clear the global_tunables\nand the new sugov_tunables_free() is used as kobj_type::release to\nrelease the sugov_tunables safely."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:09:51.475Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cb4a53ba37532c861a5f3f22803391018a41849a"
        },
        {
          "url": "https://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c"
        },
        {
          "url": "https://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d"
        }
      ],
      "title": "cpufreq: schedutil: Use kobject release() method to free sugov_tunables",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47387",
    "datePublished": "2024-05-21T15:03:46.925Z",
    "dateReserved": "2024-05-21T14:58:30.813Z",
    "dateUpdated": "2025-05-04T07:09:51.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cb4a53ba37532c861a5f3f22803391018a41849a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.003Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47387\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-11T18:55:39.448369Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-11T18:55:46.372Z\"}}], \"cna\": {\"title\": \"cpufreq: schedutil: Use kobject release() method to free sugov_tunables\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"cb4a53ba37532c861a5f3f22803391018a41849a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"463c46705f321201090b69c4ad5da0cd2ce614c9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"67c98e023135ff81b8d52998a6fdb8ca0c518d82\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"a7d4fc84404d45d72f4490417e8cc3efa4af93f1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"8d62aec52a8c5b1d25a2364b243fcc5098a2ede9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bdcb44e391da5c41b98573bf0305a0e0b1c9569\", \"lessThan\": \"e5c6b312ce3cc97e90ea159446e6bfa06645364d\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/sched/cpufreq_schedutil.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.285\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.249\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.209\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.151\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.71\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/sched/cpufreq_schedutil.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cb4a53ba37532c861a5f3f22803391018a41849a\"}, {\"url\": \"https://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9\"}, {\"url\": \"https://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c\"}, {\"url\": \"https://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82\"}, {\"url\": \"https://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1\"}, {\"url\": \"https://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9\"}, {\"url\": \"https://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncpufreq: schedutil: Use kobject release() method to free sugov_tunables\\n\\nThe struct sugov_tunables is protected by the kobject, so we can\u0027t free\\nit directly. Otherwise we would get a call trace like this:\\n  ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x30\\n  WARNING: CPU: 3 PID: 720 at lib/debugobjects.c:505 debug_print_object+0xb8/0x100\\n  Modules linked in:\\n  CPU: 3 PID: 720 Comm: a.sh Tainted: G        W         5.14.0-rc1-next-20210715-yocto-standard+ #507\\n  Hardware name: Marvell OcteonTX CN96XX board (DT)\\n  pstate: 40400009 (nZcv daif +PAN -UAO -TCO BTYPE=--)\\n  pc : debug_print_object+0xb8/0x100\\n  lr : debug_print_object+0xb8/0x100\\n  sp : ffff80001ecaf910\\n  x29: ffff80001ecaf910 x28: ffff00011b10b8d0 x27: ffff800011043d80\\n  x26: ffff00011a8f0000 x25: ffff800013cb3ff0 x24: 0000000000000000\\n  x23: ffff80001142aa68 x22: ffff800011043d80 x21: ffff00010de46f20\\n  x20: ffff800013c0c520 x19: ffff800011d8f5b0 x18: 0000000000000010\\n  x17: 6e6968207473696c x16: 5f72656d6974203a x15: 6570797420746365\\n  x14: 6a626f2029302065 x13: 303378302f307830 x12: 2b6e665f72656d69\\n  x11: ffff8000124b1560 x10: ffff800012331520 x9 : ffff8000100ca6b0\\n  x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 0000000000000001\\n  x5 : ffff800011d8c000 x4 : ffff800011d8c740 x3 : 0000000000000000\\n  x2 : ffff0001108301c0 x1 : ab3c90eedf9c0f00 x0 : 0000000000000000\\n  Call trace:\\n   debug_print_object+0xb8/0x100\\n   __debug_check_no_obj_freed+0x1c0/0x230\\n   debug_check_no_obj_freed+0x20/0x88\\n   slab_free_freelist_hook+0x154/0x1c8\\n   kfree+0x114/0x5d0\\n   sugov_exit+0xbc/0xc0\\n   cpufreq_exit_governor+0x44/0x90\\n   cpufreq_set_policy+0x268/0x4a8\\n   store_scaling_governor+0xe0/0x128\\n   store+0xc0/0xf0\\n   sysfs_kf_write+0x54/0x80\\n   kernfs_fop_write_iter+0x128/0x1c0\\n   new_sync_write+0xf0/0x190\\n   vfs_write+0x2d4/0x478\\n   ksys_write+0x74/0x100\\n   __arm64_sys_write+0x24/0x30\\n   invoke_syscall.constprop.0+0x54/0xe0\\n   do_el0_svc+0x64/0x158\\n   el0_svc+0x2c/0xb0\\n   el0t_64_sync_handler+0xb0/0xb8\\n   el0t_64_sync+0x198/0x19c\\n  irq event stamp: 5518\\n  hardirqs last  enabled at (5517): [\u003cffff8000100cbd7c\u003e] console_unlock+0x554/0x6c8\\n  hardirqs last disabled at (5518): [\u003cffff800010fc0638\u003e] el1_dbg+0x28/0xa0\\n  softirqs last  enabled at (5504): [\u003cffff8000100106e0\u003e] __do_softirq+0x4d0/0x6c0\\n  softirqs last disabled at (5483): [\u003cffff800010049548\u003e] irq_exit+0x1b0/0x1b8\\n\\nSo split the original sugov_tunables_free() into two functions,\\nsugov_clear_global_tunables() is just used to clear the global_tunables\\nand the new sugov_tunables_free() is used as kobj_type::release to\\nrelease the sugov_tunables safely.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.285\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.249\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.209\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.151\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.71\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.10\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"4.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:09:51.475Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47387\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:09:51.475Z\", \"dateReserved\": \"2024-05-21T14:58:30.813Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:03:46.925Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.