cve-2024-26796
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2024-11-05 09:15
Severity ?
Summary
drivers: perf: ctr_get_width function for legacy is not defined
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/682dc133f83e0194796e6ea72eb642df1c03dfbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0d17ee872cf8d0f51cc561329b8e1a0aa792bbb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4f50e85de5a6b21dfdc0d7ca435eba4f62935c3
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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                "id": "CVE-2024-26796",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
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                "timestamp": "2024-09-10T15:50:49.551123Z",
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/perf/riscv_pmu.c",
            "drivers/perf/riscv_pmu_legacy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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          "programFiles": [
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              "version": "6.7.9",
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              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: perf: ctr_get_width function for legacy is not defined\n\nWith parameters CONFIG_RISCV_PMU_LEGACY=y and CONFIG_RISCV_PMU_SBI=n\nlinux kernel crashes when you try perf record:\n\n$ perf record ls\n[ 46.749286] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[ 46.750199] Oops [#1]\n[ 46.750342] Modules linked in:\n[ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2\n[ 46.750906] Hardware name: riscv-virtio,qemu (DT)\n[ 46.751184] epc : 0x0\n[ 46.751430] ra : arch_perf_update_userpage+0x54/0x13e\n[ 46.751680] epc : 0000000000000000 ra : ffffffff8072ee52 sp : ff2000000022b8f0\n[ 46.751958] gp : ffffffff81505988 tp : ff6000000290d400 t0 : ff2000000022b9c0\n[ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930\n[ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a1 : ff600000028fb000\n[ 46.752673] a2 : 0000000ae2751268 a3 : 00000000004fb708 a4 : 0000000000000004\n[ 46.752895] a5 : 0000000000000000 a6 : 000000000017ffe3 a7 : 00000000000000d2\n[ 46.753117] s2 : ff600000028fb000 s3 : 0000000ae2751268 s4 : 0000000000000000\n[ 46.753338] s5 : ffffffff8153e290 s6 : ff600000863b9000 s7 : ff60000002961078\n[ 46.753562] s8 : ff60000002961048 s9 : ff60000002961058 s10: 0000000000000001\n[ 46.753783] s11: 0000000000000018 t3 : ffffffffffffffff t4 : ffffffffffffffff\n[ 46.754005] t5 : ff6000000292270c t6 : ff2000000022bb30\n[ 46.754179] status: 0000000200000100 badaddr: 0000000000000000 cause: 000000000000000c\n[ 46.754653] Code: Unable to access instruction at 0xffffffffffffffec.\n[ 46.754939] ---[ end trace 0000000000000000 ]---\n[ 46.755131] note: perf-exec[107] exited with irqs disabled\n[ 46.755546] note: perf-exec[107] exited with preempt_count 4\n\nThis happens because in the legacy case the ctr_get_width function was not\ndefined, but it is used in arch_perf_update_userpage.\n\nAlso remove extra check in riscv_pmu_ctr_get_width_mask"
        }
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        "dateUpdated": "2024-11-05T09:15:59.197Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/682dc133f83e0194796e6ea72eb642df1c03dfbe"
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      ],
      "title": "drivers: perf: ctr_get_width function for legacy is not defined",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26796",
    "datePublished": "2024-04-04T08:20:25.823Z",
    "dateReserved": "2024-02-19T14:20:24.178Z",
    "dateUpdated": "2024-11-05T09:15:59.197Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26796\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:08.790\",\"lastModified\":\"2024-04-04T12:48:22.650\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrivers: perf: ctr_get_width function for legacy is not defined\\n\\nWith parameters CONFIG_RISCV_PMU_LEGACY=y and CONFIG_RISCV_PMU_SBI=n\\nlinux kernel crashes when you try perf record:\\n\\n$ perf record ls\\n[ 46.749286] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\\n[ 46.750199] Oops [#1]\\n[ 46.750342] Modules linked in:\\n[ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2\\n[ 46.750906] Hardware name: riscv-virtio,qemu (DT)\\n[ 46.751184] epc : 0x0\\n[ 46.751430] ra : arch_perf_update_userpage+0x54/0x13e\\n[ 46.751680] epc : 0000000000000000 ra : ffffffff8072ee52 sp : ff2000000022b8f0\\n[ 46.751958] gp : ffffffff81505988 tp : ff6000000290d400 t0 : ff2000000022b9c0\\n[ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930\\n[ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a1 : ff600000028fb000\\n[ 46.752673] a2 : 0000000ae2751268 a3 : 00000000004fb708 a4 : 0000000000000004\\n[ 46.752895] a5 : 0000000000000000 a6 : 000000000017ffe3 a7 : 00000000000000d2\\n[ 46.753117] s2 : ff600000028fb000 s3 : 0000000ae2751268 s4 : 0000000000000000\\n[ 46.753338] s5 : ffffffff8153e290 s6 : ff600000863b9000 s7 : ff60000002961078\\n[ 46.753562] s8 : ff60000002961048 s9 : ff60000002961058 s10: 0000000000000001\\n[ 46.753783] s11: 0000000000000018 t3 : ffffffffffffffff t4 : ffffffffffffffff\\n[ 46.754005] t5 : ff6000000292270c t6 : ff2000000022bb30\\n[ 46.754179] status: 0000000200000100 badaddr: 0000000000000000 cause: 000000000000000c\\n[ 46.754653] Code: Unable to access instruction at 0xffffffffffffffec.\\n[ 46.754939] ---[ end trace 0000000000000000 ]---\\n[ 46.755131] note: perf-exec[107] exited with irqs disabled\\n[ 46.755546] note: perf-exec[107] exited with preempt_count 4\\n\\nThis happens because in the legacy case the ctr_get_width function was not\\ndefined, but it is used in arch_perf_update_userpage.\\n\\nAlso remove extra check in riscv_pmu_ctr_get_width_mask\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: controladores: perf: ctr_get_width la funci\u00f3n para legado no est\u00e1 definida Con los par\u00e1metros CONFIG_RISCV_PMU_LEGACY=y y CONFIG_RISCV_PMU_SBI=n el kernel de Linux falla cuando intenta el registro de rendimiento: $ perf record ls [ 46.749286] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 [ 46.750199] Ups [#1] [ 46.750342] M\u00f3dulos vinculados en: [ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2 [ 46.750906] Nombre del hardware : riscv-virtio,qemu (DT) [ 46.751184] epc : 0x0 [ 46.751430 ] ra : arch_perf_update_userpage+0x54/0x13e [ 46.751680] epc : 00000000000000000 ra : ffffffff8072ee52 sp : ff20000 00022b8f0 [46.751958] gp: ffffffff81505988 tp: ff6000000290d400 t0: ff2000000022b9c0 [ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930 [ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a 1: ff600000028fb000 [46.752673] a2: 0000000ae2751268 a3: 00000000004fb708 a4: 00000000000000004 [46.752895] a5: 0000000000000000 a6: 000000000017ffe3 a7: 00000000000000d2 [46.753117] s2: ff600000028fb000 s3: 0000000ae2751268 s4: 0000000000000000 [46.753338] s5: ffffffff8153e290 s6: ff600000863b9000 s7: ff60000002 961078 [46.753562] s8: ff60000002961048 s9: ff60000002961058 s10: 00000000000000001 [46.753783] s11: 0000000000000018 t3: ffffffffffffff ff t4 : ffffffffffffffff [ 46.754005] t5 : ff6000000292270c t6: ff2000000022bb30 [46.754179] estado: 0000000200000100 badaddr: 00000000000000000 causa: 0000000000000000c [46.754653] C\u00f3digo: No se puede acceder instrucci\u00f3n en 0xffffffffffffffec. [ 46.754939] ---[ end trace 0000000000000000 ]--- [ 46.755131] nota: perf-exec[107] sali\u00f3 con irqs deshabilitados [ 46.755546] nota: perf-exec[107] sali\u00f3 con preempt_count 4 Esto sucede porque en el legado En este caso, la funci\u00f3n ctr_get_width no se defini\u00f3, pero se usa en arch_perf_update_userpage. Tambi\u00e9n elimine el control adicional en riscv_pmu_ctr_get_width_mask\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/682dc133f83e0194796e6ea72eb642df1c03dfbe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0d17ee872cf8d0f51cc561329b8e1a0aa792bbb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4f50e85de5a6b21dfdc0d7ca435eba4f62935c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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