cve-2024-56587
Vulnerability from cvelistv5
Published
2024-12-27 14:50
Modified
2025-01-20 06:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: leds: class: Protect brightness_show() with led_cdev->led_access mutex There is NULL pointer issue observed if from Process A where hid device being added which results in adding a led_cdev addition and later a another call to access of led_cdev attribute from Process B can result in NULL pointer issue. Use mutex led_cdev->led_access to protect access to led->cdev and its attribute inside brightness_show() and max_brightness_show() and also update the comment for mutex that it should be used to protect the led class device fields. Process A Process B kthread+0x114 worker_thread+0x244 process_scheduled_works+0x248 uhid_device_add_worker+0x24 hid_add_device+0x120 device_add+0x268 bus_probe_device+0x94 device_initial_probe+0x14 __device_attach+0xfc bus_for_each_drv+0x10c __device_attach_driver+0x14c driver_probe_device+0x3c __driver_probe_device+0xa0 really_probe+0x190 hid_device_probe+0x130 ps_probe+0x990 ps_led_register+0x94 devm_led_classdev_register_ext+0x58 led_classdev_register_ext+0x1f8 device_create_with_groups+0x48 device_create_groups_vargs+0xc8 device_add+0x244 kobject_uevent+0x14 kobject_uevent_env[jt]+0x224 mutex_unlock[jt]+0xc4 __mutex_unlock_slowpath+0xd4 wake_up_q+0x70 try_to_wake_up[jt]+0x48c preempt_schedule_common+0x28 __schedule+0x628 __switch_to+0x174 el0t_64_sync+0x1a8/0x1ac el0t_64_sync_handler+0x68/0xbc el0_svc+0x38/0x68 do_el0_svc+0x1c/0x28 el0_svc_common+0x80/0xe0 invoke_syscall+0x58/0x114 __arm64_sys_read+0x1c/0x2c ksys_read+0x78/0xe8 vfs_read+0x1e0/0x2c8 kernfs_fop_read_iter+0x68/0x1b4 seq_read_iter+0x158/0x4ec kernfs_seq_show+0x44/0x54 sysfs_kf_seq_show+0xb4/0x130 dev_attr_show+0x38/0x74 brightness_show+0x20/0x4c dualshock4_led_get_brightness+0xc/0x74 [ 3313.874295][ T4013] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000060 [ 3313.874301][ T4013] Mem abort info: [ 3313.874303][ T4013] ESR = 0x0000000096000006 [ 3313.874305][ T4013] EC = 0x25: DABT (current EL), IL = 32 bits [ 3313.874307][ T4013] SET = 0, FnV = 0 [ 3313.874309][ T4013] EA = 0, S1PTW = 0 [ 3313.874311][ T4013] FSC = 0x06: level 2 translation fault [ 3313.874313][ T4013] Data abort info: [ 3313.874314][ T4013] ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 [ 3313.874316][ T4013] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 3313.874318][ T4013] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 3313.874320][ T4013] user pgtable: 4k pages, 39-bit VAs, pgdp=00000008f2b0a000 .. [ 3313.874332][ T4013] Dumping ftrace buffer: [ 3313.874334][ T4013] (ftrace buffer empty) .. .. [ dd3313.874639][ T4013] CPU: 6 PID: 4013 Comm: InputReader [ 3313.874648][ T4013] pc : dualshock4_led_get_brightness+0xc/0x74 [ 3313.874653][ T4013] lr : led_update_brightness+0x38/0x60 [ 3313.874656][ T4013] sp : ffffffc0b910bbd0 .. .. [ 3313.874685][ T4013] Call trace: [ 3313.874687][ T4013] dualshock4_led_get_brightness+0xc/0x74 [ 3313.874690][ T4013] brightness_show+0x20/0x4c [ 3313.874692][ T4013] dev_attr_show+0x38/0x74 [ 3313.874696][ T4013] sysfs_kf_seq_show+0xb4/0x130 [ 3313.874700][ T4013] kernfs_seq_show+0x44/0x54 [ 3313.874703][ T4013] seq_read_iter+0x158/0x4ec [ 3313.874705][ T4013] kernfs_fop_read_iter+0x68/0x1b4 [ 3313.874708][ T4013] vfs_read+0x1e0/0x2c8 [ 3313.874711][ T4013] ksys_read+0x78/0xe8 [ 3313.874714][ T4013] __arm64_sys_read+0x1c/0x2c [ 3313.874718][ T4013] invoke_syscall+0x58/0x114 [ 3313.874721][ T4013] el0_svc_common+0x80/0xe0 [ 3313.874724][ T4013] do_el0_svc+0x1c/0x28 [ 3313.874727][ T4013] el0_svc+0x38/0x68 [ 3313.874730][ T4013] el0t_64_sync_handler+0x68/0xbc [ 3313.874732][ T4013] el0t_64_sync+0x1a8/0x1ac
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ca7cd938725a4050dcd62ae9472e931d603118dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50d9f68e4adf86901cbab1bd5b91f710aa9141b9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84b42d5b5fcd767c9b7f30b0b32065ed949fe804Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8283d52ed15c02bb2eb9b1b8644dcc34f8e98f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb4a6236a430cfc3713f470f3a969f39d6d4ca25Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ddcfc5708da9972ac23a9121b3d819b0a53d6f21Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6d6fb563e4be245a17bc4261a4b294e8bf8a31ePatch
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/leds/led-class.c",
            "include/linux/leds.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "84b42d5b5fcd767c9b7f30b0b32065ed949fe804",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ddcfc5708da9972ac23a9121b3d819b0a53d6f21",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "b8283d52ed15c02bb2eb9b1b8644dcc34f8e98f1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "50d9f68e4adf86901cbab1bd5b91f710aa9141b9",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f6d6fb563e4be245a17bc4261a4b294e8bf8a31e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "bb4a6236a430cfc3713f470f3a969f39d6d4ca25",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "4ca7cd938725a4050dcd62ae9472e931d603118d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/leds/led-class.c",
            "include/linux/leds.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.287",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.231",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.174",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nleds: class: Protect brightness_show() with led_cdev-\u003eled_access mutex\n\nThere is NULL pointer issue observed if from Process A where hid device\nbeing added which results in adding a led_cdev addition and later a\nanother call to access of led_cdev attribute from Process B can result\nin NULL pointer issue.\n\nUse mutex led_cdev-\u003eled_access to protect access to led-\u003ecdev and its\nattribute inside brightness_show() and max_brightness_show() and also\nupdate the comment for mutex that it should be used to protect the led\nclass device fields.\n\n\tProcess A \t\t\t\tProcess B\n\n kthread+0x114\n worker_thread+0x244\n process_scheduled_works+0x248\n uhid_device_add_worker+0x24\n hid_add_device+0x120\n device_add+0x268\n bus_probe_device+0x94\n device_initial_probe+0x14\n __device_attach+0xfc\n bus_for_each_drv+0x10c\n __device_attach_driver+0x14c\n driver_probe_device+0x3c\n __driver_probe_device+0xa0\n really_probe+0x190\n hid_device_probe+0x130\n ps_probe+0x990\n ps_led_register+0x94\n devm_led_classdev_register_ext+0x58\n led_classdev_register_ext+0x1f8\n device_create_with_groups+0x48\n device_create_groups_vargs+0xc8\n device_add+0x244\n kobject_uevent+0x14\n kobject_uevent_env[jt]+0x224\n mutex_unlock[jt]+0xc4\n __mutex_unlock_slowpath+0xd4\n wake_up_q+0x70\n try_to_wake_up[jt]+0x48c\n preempt_schedule_common+0x28\n __schedule+0x628\n __switch_to+0x174\n\t\t\t\t\t\tel0t_64_sync+0x1a8/0x1ac\n\t\t\t\t\t\tel0t_64_sync_handler+0x68/0xbc\n\t\t\t\t\t\tel0_svc+0x38/0x68\n\t\t\t\t\t\tdo_el0_svc+0x1c/0x28\n\t\t\t\t\t\tel0_svc_common+0x80/0xe0\n\t\t\t\t\t\tinvoke_syscall+0x58/0x114\n\t\t\t\t\t\t__arm64_sys_read+0x1c/0x2c\n\t\t\t\t\t\tksys_read+0x78/0xe8\n\t\t\t\t\t\tvfs_read+0x1e0/0x2c8\n\t\t\t\t\t\tkernfs_fop_read_iter+0x68/0x1b4\n\t\t\t\t\t\tseq_read_iter+0x158/0x4ec\n\t\t\t\t\t\tkernfs_seq_show+0x44/0x54\n\t\t\t\t\t\tsysfs_kf_seq_show+0xb4/0x130\n\t\t\t\t\t\tdev_attr_show+0x38/0x74\n\t\t\t\t\t\tbrightness_show+0x20/0x4c\n\t\t\t\t\t\tdualshock4_led_get_brightness+0xc/0x74\n\n[ 3313.874295][ T4013] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000060\n[ 3313.874301][ T4013] Mem abort info:\n[ 3313.874303][ T4013]   ESR = 0x0000000096000006\n[ 3313.874305][ T4013]   EC = 0x25: DABT (current EL), IL = 32 bits\n[ 3313.874307][ T4013]   SET = 0, FnV = 0\n[ 3313.874309][ T4013]   EA = 0, S1PTW = 0\n[ 3313.874311][ T4013]   FSC = 0x06: level 2 translation fault\n[ 3313.874313][ T4013] Data abort info:\n[ 3313.874314][ T4013]   ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000\n[ 3313.874316][ T4013]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[ 3313.874318][ T4013]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[ 3313.874320][ T4013] user pgtable: 4k pages, 39-bit VAs, pgdp=00000008f2b0a000\n..\n\n[ 3313.874332][ T4013] Dumping ftrace buffer:\n[ 3313.874334][ T4013]    (ftrace buffer empty)\n..\n..\n[ dd3313.874639][ T4013] CPU: 6 PID: 4013 Comm: InputReader\n[ 3313.874648][ T4013] pc : dualshock4_led_get_brightness+0xc/0x74\n[ 3313.874653][ T4013] lr : led_update_brightness+0x38/0x60\n[ 3313.874656][ T4013] sp : ffffffc0b910bbd0\n..\n..\n[ 3313.874685][ T4013] Call trace:\n[ 3313.874687][ T4013]  dualshock4_led_get_brightness+0xc/0x74\n[ 3313.874690][ T4013]  brightness_show+0x20/0x4c\n[ 3313.874692][ T4013]  dev_attr_show+0x38/0x74\n[ 3313.874696][ T4013]  sysfs_kf_seq_show+0xb4/0x130\n[ 3313.874700][ T4013]  kernfs_seq_show+0x44/0x54\n[ 3313.874703][ T4013]  seq_read_iter+0x158/0x4ec\n[ 3313.874705][ T4013]  kernfs_fop_read_iter+0x68/0x1b4\n[ 3313.874708][ T4013]  vfs_read+0x1e0/0x2c8\n[ 3313.874711][ T4013]  ksys_read+0x78/0xe8\n[ 3313.874714][ T4013]  __arm64_sys_read+0x1c/0x2c\n[ 3313.874718][ T4013]  invoke_syscall+0x58/0x114\n[ 3313.874721][ T4013]  el0_svc_common+0x80/0xe0\n[ 3313.874724][ T4013]  do_el0_svc+0x1c/0x28\n[ 3313.874727][ T4013]  el0_svc+0x38/0x68\n[ 3313.874730][ T4013]  el0t_64_sync_handler+0x68/0xbc\n[ 3313.874732][ T4013]  el0t_64_sync+0x1a8/0x1ac"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-20T06:23:37.504Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/84b42d5b5fcd767c9b7f30b0b32065ed949fe804"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddcfc5708da9972ac23a9121b3d819b0a53d6f21"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8283d52ed15c02bb2eb9b1b8644dcc34f8e98f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/50d9f68e4adf86901cbab1bd5b91f710aa9141b9"
        },
        {
          "url": "https://git.kernel.org/stable/c/f6d6fb563e4be245a17bc4261a4b294e8bf8a31e"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb4a6236a430cfc3713f470f3a969f39d6d4ca25"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ca7cd938725a4050dcd62ae9472e931d603118d"
        }
      ],
      "title": "leds: class: Protect brightness_show() with led_cdev-\u003eled_access mutex",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56587",
    "datePublished": "2024-12-27T14:50:55.402Z",
    "dateReserved": "2024-12-27T14:03:06.002Z",
    "dateUpdated": "2025-01-20T06:23:37.504Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56587\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:17.917\",\"lastModified\":\"2025-01-31T15:27:30.777\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nleds: class: Protect brightness_show() with led_cdev-\u003eled_access mutex\\n\\nThere is NULL pointer issue observed if from Process A where hid device\\nbeing added which results in adding a led_cdev addition and later a\\nanother call to access of led_cdev attribute from Process B can result\\nin NULL pointer issue.\\n\\nUse mutex led_cdev-\u003eled_access to protect access to led-\u003ecdev and its\\nattribute inside brightness_show() and max_brightness_show() and also\\nupdate the comment for mutex that it should be used to protect the led\\nclass device fields.\\n\\n\\tProcess A \\t\\t\\t\\tProcess B\\n\\n kthread+0x114\\n worker_thread+0x244\\n process_scheduled_works+0x248\\n uhid_device_add_worker+0x24\\n hid_add_device+0x120\\n device_add+0x268\\n bus_probe_device+0x94\\n device_initial_probe+0x14\\n __device_attach+0xfc\\n bus_for_each_drv+0x10c\\n __device_attach_driver+0x14c\\n driver_probe_device+0x3c\\n __driver_probe_device+0xa0\\n really_probe+0x190\\n hid_device_probe+0x130\\n ps_probe+0x990\\n ps_led_register+0x94\\n devm_led_classdev_register_ext+0x58\\n led_classdev_register_ext+0x1f8\\n device_create_with_groups+0x48\\n device_create_groups_vargs+0xc8\\n device_add+0x244\\n kobject_uevent+0x14\\n kobject_uevent_env[jt]+0x224\\n mutex_unlock[jt]+0xc4\\n __mutex_unlock_slowpath+0xd4\\n wake_up_q+0x70\\n try_to_wake_up[jt]+0x48c\\n preempt_schedule_common+0x28\\n __schedule+0x628\\n __switch_to+0x174\\n\\t\\t\\t\\t\\t\\tel0t_64_sync+0x1a8/0x1ac\\n\\t\\t\\t\\t\\t\\tel0t_64_sync_handler+0x68/0xbc\\n\\t\\t\\t\\t\\t\\tel0_svc+0x38/0x68\\n\\t\\t\\t\\t\\t\\tdo_el0_svc+0x1c/0x28\\n\\t\\t\\t\\t\\t\\tel0_svc_common+0x80/0xe0\\n\\t\\t\\t\\t\\t\\tinvoke_syscall+0x58/0x114\\n\\t\\t\\t\\t\\t\\t__arm64_sys_read+0x1c/0x2c\\n\\t\\t\\t\\t\\t\\tksys_read+0x78/0xe8\\n\\t\\t\\t\\t\\t\\tvfs_read+0x1e0/0x2c8\\n\\t\\t\\t\\t\\t\\tkernfs_fop_read_iter+0x68/0x1b4\\n\\t\\t\\t\\t\\t\\tseq_read_iter+0x158/0x4ec\\n\\t\\t\\t\\t\\t\\tkernfs_seq_show+0x44/0x54\\n\\t\\t\\t\\t\\t\\tsysfs_kf_seq_show+0xb4/0x130\\n\\t\\t\\t\\t\\t\\tdev_attr_show+0x38/0x74\\n\\t\\t\\t\\t\\t\\tbrightness_show+0x20/0x4c\\n\\t\\t\\t\\t\\t\\tdualshock4_led_get_brightness+0xc/0x74\\n\\n[ 3313.874295][ T4013] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000060\\n[ 3313.874301][ T4013] Mem abort info:\\n[ 3313.874303][ T4013]   ESR = 0x0000000096000006\\n[ 3313.874305][ T4013]   EC = 0x25: DABT (current EL), IL = 32 bits\\n[ 3313.874307][ T4013]   SET = 0, FnV = 0\\n[ 3313.874309][ T4013]   EA = 0, S1PTW = 0\\n[ 3313.874311][ T4013]   FSC = 0x06: level 2 translation fault\\n[ 3313.874313][ T4013] Data abort info:\\n[ 3313.874314][ T4013]   ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000\\n[ 3313.874316][ T4013]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\\n[ 3313.874318][ T4013]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\\n[ 3313.874320][ T4013] user pgtable: 4k pages, 39-bit VAs, pgdp=00000008f2b0a000\\n..\\n\\n[ 3313.874332][ T4013] Dumping ftrace buffer:\\n[ 3313.874334][ T4013]    (ftrace buffer empty)\\n..\\n..\\n[ dd3313.874639][ T4013] CPU: 6 PID: 4013 Comm: InputReader\\n[ 3313.874648][ T4013] pc : dualshock4_led_get_brightness+0xc/0x74\\n[ 3313.874653][ T4013] lr : led_update_brightness+0x38/0x60\\n[ 3313.874656][ T4013] sp : ffffffc0b910bbd0\\n..\\n..\\n[ 3313.874685][ T4013] Call trace:\\n[ 3313.874687][ T4013]  dualshock4_led_get_brightness+0xc/0x74\\n[ 3313.874690][ T4013]  brightness_show+0x20/0x4c\\n[ 3313.874692][ T4013]  dev_attr_show+0x38/0x74\\n[ 3313.874696][ T4013]  sysfs_kf_seq_show+0xb4/0x130\\n[ 3313.874700][ T4013]  kernfs_seq_show+0x44/0x54\\n[ 3313.874703][ T4013]  seq_read_iter+0x158/0x4ec\\n[ 3313.874705][ T4013]  kernfs_fop_read_iter+0x68/0x1b4\\n[ 3313.874708][ T4013]  vfs_read+0x1e0/0x2c8\\n[ 3313.874711][ T4013]  ksys_read+0x78/0xe8\\n[ 3313.874714][ T4013]  __arm64_sys_read+0x1c/0x2c\\n[ 3313.874718][ T4013]  invoke_syscall+0x58/0x114\\n[ 3313.874721][ T4013]  el0_svc_common+0x80/0xe0\\n[ 3313.874724][ T4013]  do_el0_svc+0x1c/0x28\\n[ 3313.874727][ T4013]  el0_svc+0x38/0x68\\n[ 3313.874730][ T4013]  el0t_64_sync_handler+0x68/0xbc\\n[ 3313.874732][ T4013]  el0t_64_sync+0x1a8/0x1ac\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: leds: clase: Proteger illumination_show() con led_cdev-\u0026gt;led_access mutex Se observa un problema de puntero NULL si desde el Proceso A se agrega el dispositivo hid, lo que da como resultado la adici\u00f3n de una adici\u00f3n led_cdev y luego otra llamada para acceder al atributo led_cdev desde el Proceso B puede resultar en un problema de puntero NULL. Use mutex led_cdev-\u0026gt;led_access para proteger el acceso a led-\u0026gt;cdev y su atributo dentro de illumination_show() y max_brightness_show() y tambi\u00e9n actualice el comentario para mutex que debe usarse para proteger los campos del dispositivo de clase led. Proceso A Proceso B kthread+0x114 worker_thread+0x244 process_scheduled_works+0x248 uhid_device_add_worker+0x24 hid_add_device+0x120 device_add+0x268 bus_probe_device+0x94 device_initial_probe+0x14 __device_attach+0xfc bus_for_each_drv+0x10c __device_attach_driver+0x14c driver_probe_device+0x3c __driver_probe_device+0xa0 really_probe+0x190 hid_device_probe+0x130 ps_probe+0x990 ps_led_register+0x94 devm_led_classdev_register_ext+0x58 led_classdev_register_ext+0x1f8 dispositivo_crear_con_grupos+0x48 dispositivo_crear_grupos_vargs+0xc8 dispositivo_agregar+0x244 kobject_uevent+0x14 kobject_uevent_env[jt]+0x224 mutex_unlock[jt]+0xc4 __mutex_unlock_slowpath+0xd4 wake_up_q+0x70 intento_de_activar[jt]+0x48c preempt_schedule_common+0x28 __schedule+0x628 __switch_to+0x174 el0t_64_sync+0x1a8/0x1ac el0t_64_sync_handler+0x68/0xbc el0_svc+0x38/0x68 do_el0_svc+0x1c/0x28 el0_svc_common+0x80/0xe0 invocar_syscall+0x58/0x114 __arm64_sys_read+0x1c/0x2c ksys_read+0x78/0xe8 vfs_read+0x1e0/0x2c8 kernfs_fop_read_iter+0x68/0x1b4 seq_read_iter+0x158/0x4ec kernfs_seq_show+0x44/0x54 sysfs_kf_seq_show+0xb4/0x130 dev_attr_show+0x38/0x74 brillo_show+0x20/0x4c dualshock4_led_get_brillo+0xc/0x74 [ 3313.874295][ T4013] No se puede gestionar la desreferencia del puntero NULL del n\u00facleo en la direcci\u00f3n virtual 0000000000000060 [ 3313.874301][ T4013] Informaci\u00f3n de aborto de memoria: [ 3313.874303][ T4013] ESR = 0x0000000096000006 [ 3313.874305][ T4013] EC = 0x25: DABT (EL actual), IL = 32 bits [ 3313.874307][ T4013] SET = 0, FnV = 0 [ 3313.874309][ T4013] EA = 0, S1PTW = 0 [ 3313.874311][ T4013] FSC = 0x06: error de traducci\u00f3n de nivel 2 [ 3313.874313][ T4013] Informaci\u00f3n de cancelaci\u00f3n de datos: [ 3313.874314][ T4013] ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 [ 3313.874316][ T4013] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 3313.874318][ T4013] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 3313.874320][ T4013] pgtable de usuario: p\u00e1ginas de 4k, VA de 39 bits, pgdp=00000008f2b0a000 .. [ 3313.874332][ T4013] Volcando b\u00fafer ftrace: [ 3313.874334][ T4013] (b\u00fafer ftrace vac\u00edo) .. .. [ dd3313.874639][ T4013] CPU: 6 PID: 4013 Comm: InputReader [ 3313.874648][ T4013] pc : dualshock4_led_get_brightness+0xc/0x74 [ 3313.874653][ T4013] lr : led_update_brightness+0x38/0x60 [ 3313.874656][ T4013] sp : ffffffc0b910bbd0 .. .. [ 3313.874685][ T4013] Rastreo de llamadas: [ 3313.874687][ T4013] dualshock4_led_get_brightness+0xc/0x74 [ 3313.874690][ T4013] brillo_show+0x20/0x4c [ 3313.874692][ T4013] dev_attr_show+0x38/0x74 [ 3313.874696][ T4013] sysfs_kf_seq_show+0xb4/0x130 [ 3313.874700][ T4013] kernfs_seq_show+0x44/0x54 [ 3313.874703][ T4013] seq_read_iter+0x158/0x4ec [ 3313.874705][ T4013] kernfs_fop_read_iter+0x68/0x1b4 [ 3313.874708][ T4013] vfs_read+0x1e0/0x2c8 [ 3313.874711][ T4013] ksys_read+0x78/0xe8 [ 3313.874714][ T4013] __arm64_sys_read+0x1c/0x2c [ 3313.874718][ T4013] invocar_llamada_al_sistema+0x58/0x114 [ 3313.874721][ T4013] el0_svc_common+0x80/0xe0 [ 3313.874724][ T4013] do_el0_svc+0x1c/0x28 [ 3313.874727][ T4013] el0_svc+0x38/0x68 [ 3313.874730][ T4013] el0t_64_sync_handler+0x68/0xbc [ 3313.874732][ T4013] el0t_64_sync+0x1a8/0x1ac\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.287\",\"matchCriteriaId\":\"DC7D5C80-B677-4131-A399-3366D7F3961C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.231\",\"matchCriteriaId\":\"B5C644CC-2BD7-4E32-BC54-8DCC7ABE9935\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.174\",\"matchCriteriaId\":\"419FD073-1517-4FD5-8158-F94BC68A1E89\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.120\",\"matchCriteriaId\":\"09AC6122-E2A4-40FE-9D33-268A1B2EC265\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.66\",\"matchCriteriaId\":\"29A976AD-B9AB-4A95-9F08-7669F8847EB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.5\",\"matchCriteriaId\":\"9501D045-7A94-42CA-8B03-821BE94A65B7\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4ca7cd938725a4050dcd62ae9472e931d603118d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/50d9f68e4adf86901cbab1bd5b91f710aa9141b9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/84b42d5b5fcd767c9b7f30b0b32065ed949fe804\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b8283d52ed15c02bb2eb9b1b8644dcc34f8e98f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb4a6236a430cfc3713f470f3a969f39d6d4ca25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ddcfc5708da9972ac23a9121b3d819b0a53d6f21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f6d6fb563e4be245a17bc4261a4b294e8bf8a31e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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