« Volver al listado

CVE-2024-57885

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

mm/kmemleak: fix sleeping function called from invalid context at print message

Address a bug in the kernel that triggers a "sleeping function called from invalid context" warning when /sys/kernel/debug/kmemleak is printed under specific conditions: - CONFIG_PREEMPT_RT=y - Set SELinux as the LSM for the system - Set kptr_restrict to 1 - kmemleak buffer contains at least one item

%pS and %pK, in the same back trace line, are redundant, and %pS can void %pK service in certain contexts.

%pS alone already provides the necessary information, and if it cannot resolve the symbol, it falls back to printing the raw address voiding the original intent behind the %pK.

Leer descripción completaMostrar menos

Additionally, %pK requires a privilege check CAP_SYSLOG enforced through the LSM, which can trigger a "sleeping function called from invalid context" warning under RT_PREEMPT kernels when the check occurs in an atomic context. This issue may also affect other LSMs.

This change avoids the unnecessary privilege check and resolves the sleeping function warning without any loss of information.

Detalles técnicos trazas, registros y código del informe original
BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 136, name: cat
preempt_count: 1, expected: 0
RCU nest depth: 2, expected: 2
6 locks held by cat/136:
 #0: ffff32e64bcbf950 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb8/0xe30
 #1: ffffafe6aaa9dea0 (scan_mutex){+.+.}-{3:3}, at: kmemleak_seq_start+0x34/0x128
 #3: ffff32e6546b1cd0 (&object->lock){....}-{2:2}, at: kmemleak_seq_show+0x3c/0x1e0
 #4: ffffafe6aa8d8560 (rcu_read_lock){....}-{1:2}, at: has_ns_capability_noaudit+0x8/0x1b0
 #5: ffffafe6aabbc0f8 (notif_lock){+.+.}-{2:2}, at: avc_compute_av+0xc4/0x3d0
irq event stamp: 136660
hardirqs last  enabled at (136659): [<ffffafe6a80fd7a0>] _raw_spin_unlock_irqrestore+0xa8/0xd8
hardirqs last disabled at (136660): [<ffffafe6a80fd85c>] _raw_spin_lock_irqsave+0x8c/0xb0
softirqs last  enabled at (0): [<ffffafe6a5d50b28>] copy_process+0x11d8/0x3df8
softirqs last disabled at (0): [<0000000000000000>] 0x0
Preemption disabled at:
[<ffffafe6a6598a4c>] kmemleak_seq_show+0x3c/0x1e0
CPU: 1 UID: 0 PID: 136 Comm: cat Tainted: G            E      6.11.0-rt7+ #34
Tainted: [E]=UNSIGNED_MODULE
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0xa0/0x128
 show_stack+0x1c/0x30
 dump_stack_lvl+0xe8/0x198
 dump_stack+0x18/0x20
 rt_spin_lock+0x8c/0x1a8
 avc_perm_nonode+0xa0/0x150
 cred_has_capability.isra.0+0x118/0x218
 selinux_capable+0x50/0x80
 security_capable+0x7c/0xd0
 has_ns_capability_noaudit+0x94/0x1b0
 has_capability_noaudit+0x20/0x30
 restricted_pointer+0x21c/0x4b0
 pointer+0x298/0x760
 vsnprintf+0x330/0xf70
 seq_printf+0x178/0x218
 print_unreferenced+0x1a4/0x2d0
 kmemleak_seq_show+0xd0/0x1e0
 seq_read_iter+0x354/0xe30
 seq_read+0x250/0x378
 full_proxy_read+0xd8/0x148
 vfs_read+0x190/0x918
 ksys_read+0xf0/0x1e0
 __arm64_sys_read+0x70/0xa8
 invoke_syscall.constprop.0+0xd4/0x1d8
 el0_svc+0x50/0x158
 el0t_64_sync+0x17c/0x180

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2024-57885",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3a6f33d86baa8103c80f62edd9393e9f7bf25d72",
              "lessThan": "86d946f3f9992aaa12abcfd09f925446c2cd42a2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3a6f33d86baa8103c80f62edd9393e9f7bf25d72",
              "lessThan": "64b2d32f22597b2a1dc83ac600b2426588851a97",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3a6f33d86baa8103c80f62edd9393e9f7bf25d72",
              "lessThan": "cddc76b165161a02ff14c4d84d0f5266d9d32b9e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "mm/kmemleak.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.70",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.9",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "mm/kmemleak.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-01-15T13:15:12.893",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/64b2d32f22597b2a1dc83ac600b2426588851a97",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/86d946f3f9992aaa12abcfd09f925446c2cd42a2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cddc76b165161a02ff14c4d84d0f5266d9d32b9e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: fix sleeping function called from invalid context at print message\n\nAddress a bug in the kernel that triggers a \"sleeping function called from\ninvalid context\" warning when /sys/kernel/debug/kmemleak is printed under\nspecific conditions:\n- CONFIG_PREEMPT_RT=y\n- Set SELinux as the LSM for the system\n- Set kptr_restrict to 1\n- kmemleak buffer contains at least one item\n\nBUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\nin_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 136, name: cat\npreempt_count: 1, expected: 0\nRCU nest depth: 2, expected: 2\n6 locks held by cat/136:\n #0: ffff32e64bcbf950 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb8/0xe30\n #1: ffffafe6aaa9dea0 (scan_mutex){+.+.}-{3:3}, at: kmemleak_seq_start+0x34/0x128\n #3: ffff32e6546b1cd0 (&object->lock){....}-{2:2}, at: kmemleak_seq_show+0x3c/0x1e0\n #4: ffffafe6aa8d8560 (rcu_read_lock){....}-{1:2}, at: has_ns_capability_noaudit+0x8/0x1b0\n #5: ffffafe6aabbc0f8 (notif_lock){+.+.}-{2:2}, at: avc_compute_av+0xc4/0x3d0\nirq event stamp: 136660\nhardirqs last  enabled at (136659): [<ffffafe6a80fd7a0>] _raw_spin_unlock_irqrestore+0xa8/0xd8\nhardirqs last disabled at (136660): [<ffffafe6a80fd85c>] _raw_spin_lock_irqsave+0x8c/0xb0\nsoftirqs last  enabled at (0): [<ffffafe6a5d50b28>] copy_process+0x11d8/0x3df8\nsoftirqs last disabled at (0): [<0000000000000000>] 0x0\nPreemption disabled at:\n[<ffffafe6a6598a4c>] kmemleak_seq_show+0x3c/0x1e0\nCPU: 1 UID: 0 PID: 136 Comm: cat Tainted: G            E      6.11.0-rt7+ #34\nTainted: [E]=UNSIGNED_MODULE\nHardware name: linux,dummy-virt (DT)\nCall trace:\n dump_backtrace+0xa0/0x128\n show_stack+0x1c/0x30\n dump_stack_lvl+0xe8/0x198\n dump_stack+0x18/0x20\n rt_spin_lock+0x8c/0x1a8\n avc_perm_nonode+0xa0/0x150\n cred_has_capability.isra.0+0x118/0x218\n selinux_capable+0x50/0x80\n security_capable+0x7c/0xd0\n has_ns_capability_noaudit+0x94/0x1b0\n has_capability_noaudit+0x20/0x30\n restricted_pointer+0x21c/0x4b0\n pointer+0x298/0x760\n vsnprintf+0x330/0xf70\n seq_printf+0x178/0x218\n print_unreferenced+0x1a4/0x2d0\n kmemleak_seq_show+0xd0/0x1e0\n seq_read_iter+0x354/0xe30\n seq_read+0x250/0x378\n full_proxy_read+0xd8/0x148\n vfs_read+0x190/0x918\n ksys_read+0xf0/0x1e0\n __arm64_sys_read+0x70/0xa8\n invoke_syscall.constprop.0+0xd4/0x1d8\n el0_svc+0x50/0x158\n el0t_64_sync+0x17c/0x180\n\n%pS and %pK, in the same back trace line, are redundant, and %pS can void\n%pK service in certain contexts.\n\n%pS alone already provides the necessary information, and if it cannot\nresolve the symbol, it falls back to printing the raw address voiding\nthe original intent behind the %pK.\n\nAdditionally, %pK requires a privilege check CAP_SYSLOG enforced through\nthe LSM, which can trigger a \"sleeping function called from invalid\ncontext\" warning under RT_PREEMPT kernels when the check occurs in an\natomic context. This issue may also affect other LSMs.\n\nThis change avoids the unnecessary privilege check and resolves the\nsleeping function warning without any loss of information."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/kmemleak: se corrige la función inactiva llamada desde un contexto no válido en el mensaje de impresión Se soluciona un error en el kernel que activa una advertencia de \"función inactiva llamada desde un contexto no válido\" cuando se imprime /sys/kernel/debug/kmemleak en condiciones específicas: - CONFIG_PREEMPT_RT=y - Establezca SELinux como el LSM para el sistema - Establezca kptr_restrict en 1 - el búfer de kmemleak contiene al menos un elemento ERROR: función inactiva llamada desde un contexto no válido en kernel/locking/spinlock_rt.c:48 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 136, name: cat preempt_count: 1, expected: 0 Profundidad de anidación de RCU: 2, expected: 2 6 bloqueos mantenidos por cat/136: #0: ffff32e64bcbf950 (&amp;p-&gt;bloqueo){+.+.}-{3:3}, en: seq_read_iter+0xb8/0xe30 #1: ffffafe6aaa9dea0 (scan_mutex){+.+.}-{3:3}, en: kmemleak_seq_start+0x34/0x128 #3: ffff32e6546b1cd0 (&amp;object-&gt;bloqueo){....}-{2:2}, en: kmemleak_seq_show+0x3c/0x1e0 #4: ffffafe6aa8d8560 (rcu_lectura_bloqueo){....}-{1:2}, en: has_ns_capability_noaudit+0x8/0x1b0 #5: ffffafe6aabbc0f8 (notif_bloqueo){+.+.}-{2:2}, en: avc_compute_av+0xc4/0x3d0 marca de evento de irq: 136660 hardirqs habilitados por última vez en (136659): [] _raw_spin_unlock_irqrestore+0xa8/0xd8 hardirqs deshabilitados por última vez en (136660): [] _raw_spin_lock_irqsave+0x8c/0xb0 softirqs habilitados por última vez en (0): [] copy_process+0x11d8/0x3df8 softirqs deshabilitados por última vez en (0): [&lt;0000000000000000&gt;] 0x0 Preempción deshabilitada en: [] kmemleak_seq_show+0x3c/0x1e0 CPU: 1 UID: 0 PID: 136 Comm: cat Contaminado: GE 6.11.0-rt7+ #34 Contaminado: [E]=UNSIGNED_MODULE Nombre del hardware: linux,dummy-virt (DT) Rastreo de llamadas: dump_backtrace+0xa0/0x128 show_stack+0x1c/0x30 dump_stack_lvl+0xe8/0x198 dump_stack+0x18/0x20 rt_spin_lock+0x8c/0x1a8 avc_perm_nonode+0xa0/0x150 cred_has_capability.isra.0+0x118/0x218 selinux_capable+0x50/0x80 security_capable+0x7c/0xd0 has_ns_capability_noaudit+0x94/0x1b0 has_capability_noaudit+0x20/0x30 puntero_restringido+0x21c/0x4b0 puntero+0x298/0x760 vsnprintf+0x330/0xf70 seq_printf+0x178/0x218 impresión_sin_referencia+0x1a4/0x2d0 kmemleak_seq_show+0xd0/0x1e0 seq_read_iter+0x354/0xe30 seq_read+0x250/0x378 lectura_proxy_completa+0xd8/0x148 vfs_read+0x190/0x918 ksys_read+0xf0/0x1e0 __arm64_sys_read+0x70/0xa8 %pS y %pK, en la misma línea de seguimiento inverso, son redundantes, y %pS puede anular el servicio %pK en ciertos contextos. %pS solo ya proporciona la información necesaria, y si no puede resolver el símbolo, vuelve a imprimir la dirección sin formato anulando la intención original detrás de %pK. Además, %pK requiere una verificación de privilegios CAP_SYSLOG aplicada a través del LSM, que puede activar una advertencia de \"función inactiva llamada desde un contexto no válido\" en kernels RT_PREEMPT cuando la verificación ocurre en un contexto atómico. Este problema también puede afectar a otros LSM. Este cambio evita la verificación de privilegios innecesaria y resuelve la advertencia de función inactiva sin ninguna pérdida de información."
    }
  ],
  "lastModified": "2026-06-17T08:14:08.797",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "51E6CFF2-92AA-4936-95AB-2D068168A696",
              "versionEndExcluding": "6.6.70",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1D13AF97-FFED-4B68-906D-CFE38D0B88DD",
              "versionEndExcluding": "6.12.9",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}