ghsa-x4pp-356g-v2qr
Vulnerability from github
Published
2024-04-04 09:30
Modified
2024-04-04 09:30
Details

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

drivers: perf: ctr_get_width function for legacy is not defined

With parameters CONFIG_RISCV_PMU_LEGACY=y and CONFIG_RISCV_PMU_SBI=n linux kernel crashes when you try perf record:

$ perf record ls [ 46.749286] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 46.750199] Oops [#1] [ 46.750342] Modules linked in: [ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2 [ 46.750906] Hardware name: riscv-virtio,qemu (DT) [ 46.751184] epc : 0x0 [ 46.751430] ra : arch_perf_update_userpage+0x54/0x13e [ 46.751680] epc : 0000000000000000 ra : ffffffff8072ee52 sp : ff2000000022b8f0 [ 46.751958] gp : ffffffff81505988 tp : ff6000000290d400 t0 : ff2000000022b9c0 [ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930 [ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a1 : ff600000028fb000 [ 46.752673] a2 : 0000000ae2751268 a3 : 00000000004fb708 a4 : 0000000000000004 [ 46.752895] a5 : 0000000000000000 a6 : 000000000017ffe3 a7 : 00000000000000d2 [ 46.753117] s2 : ff600000028fb000 s3 : 0000000ae2751268 s4 : 0000000000000000 [ 46.753338] s5 : ffffffff8153e290 s6 : ff600000863b9000 s7 : ff60000002961078 [ 46.753562] s8 : ff60000002961048 s9 : ff60000002961058 s10: 0000000000000001 [ 46.753783] s11: 0000000000000018 t3 : ffffffffffffffff t4 : ffffffffffffffff [ 46.754005] t5 : ff6000000292270c t6 : ff2000000022bb30 [ 46.754179] status: 0000000200000100 badaddr: 0000000000000000 cause: 000000000000000c [ 46.754653] Code: Unable to access instruction at 0xffffffffffffffec. [ 46.754939] ---[ end trace 0000000000000000 ]--- [ 46.755131] note: perf-exec[107] exited with irqs disabled [ 46.755546] note: perf-exec[107] exited with preempt_count 4

This happens because in the legacy case the ctr_get_width function was not defined, but it is used in arch_perf_update_userpage.

Also remove extra check in riscv_pmu_ctr_get_width_mask

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-26796"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-04T09:15:08Z",
    "severity": null
  },
  "details": "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",
  "id": "GHSA-x4pp-356g-v2qr",
  "modified": "2024-04-04T09:30:36Z",
  "published": "2024-04-04T09:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26796"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/682dc133f83e0194796e6ea72eb642df1c03dfbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0d17ee872cf8d0f51cc561329b8e1a0aa792bbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4f50e85de5a6b21dfdc0d7ca435eba4f62935c3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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.
  • 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.