ghsa-p6xg-gj77-6vpg
Vulnerability from github
Published
2024-05-21 18:31
Modified
2024-05-21 18:31
Details

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

perf/core: Bail out early if the request AUX area is out of bound

When perf-record with a large AUX area, e.g 4GB, it fails with:

#perf record -C 0 -m ,4G -e arm_spe_0// -- sleep 1
failed to mmap with 12 (Cannot allocate memory)

and it reveals a WARNING with __alloc_pages():

------------[ cut here ]------------
WARNING: CPU: 44 PID: 17573 at mm/page_alloc.c:5568 __alloc_pages+0x1ec/0x248
Call trace:
 __alloc_pages+0x1ec/0x248
 __kmalloc_large_node+0xc0/0x1f8
 __kmalloc_node+0x134/0x1e8
 rb_alloc_aux+0xe0/0x298
 perf_mmap+0x440/0x660
 mmap_region+0x308/0x8a8
 do_mmap+0x3c0/0x528
 vm_mmap_pgoff+0xf4/0x1b8
 ksys_mmap_pgoff+0x18c/0x218
 __arm64_sys_mmap+0x38/0x58
 invoke_syscall+0x50/0x128
 el0_svc_common.constprop.0+0x58/0x188
 do_el0_svc+0x34/0x50
 el0_svc+0x34/0x108
 el0t_64_sync_handler+0xb8/0xc0
 el0t_64_sync+0x1a4/0x1a8

'rb->aux_pages' allocated by kcalloc() is a pointer array which is used to maintains AUX trace pages. The allocated page for this array is physically contiguous (and virtually contiguous) with an order of 0..MAX_ORDER. If the size of pointer array crosses the limitation set by MAX_ORDER, it reveals a WARNING.

So bail out early with -ENOMEM if the request AUX area is out of bound, e.g.:

#perf record -C 0 -m ,4G -e arm_spe_0// -- sleep 1
failed to mmap with 12 (Cannot allocate memory)
Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52835"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:21Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Bail out early if the request AUX area is out of bound\n\nWhen perf-record with a large AUX area, e.g 4GB, it fails with:\n\n    #perf record -C 0 -m ,4G -e arm_spe_0// -- sleep 1\n    failed to mmap with 12 (Cannot allocate memory)\n\nand it reveals a WARNING with __alloc_pages():\n\n\t------------[ cut here ]------------\n\tWARNING: CPU: 44 PID: 17573 at mm/page_alloc.c:5568 __alloc_pages+0x1ec/0x248\n\tCall trace:\n\t __alloc_pages+0x1ec/0x248\n\t __kmalloc_large_node+0xc0/0x1f8\n\t __kmalloc_node+0x134/0x1e8\n\t rb_alloc_aux+0xe0/0x298\n\t perf_mmap+0x440/0x660\n\t mmap_region+0x308/0x8a8\n\t do_mmap+0x3c0/0x528\n\t vm_mmap_pgoff+0xf4/0x1b8\n\t ksys_mmap_pgoff+0x18c/0x218\n\t __arm64_sys_mmap+0x38/0x58\n\t invoke_syscall+0x50/0x128\n\t el0_svc_common.constprop.0+0x58/0x188\n\t do_el0_svc+0x34/0x50\n\t el0_svc+0x34/0x108\n\t el0t_64_sync_handler+0xb8/0xc0\n\t el0t_64_sync+0x1a4/0x1a8\n\n\u0027rb-\u003eaux_pages\u0027 allocated by kcalloc() is a pointer array which is used to\nmaintains AUX trace pages. The allocated page for this array is physically\ncontiguous (and virtually contiguous) with an order of 0..MAX_ORDER. If the\nsize of pointer array crosses the limitation set by MAX_ORDER, it reveals a\nWARNING.\n\nSo bail out early with -ENOMEM if the request AUX area is out of bound,\ne.g.:\n\n    #perf record -C 0 -m ,4G -e arm_spe_0// -- sleep 1\n    failed to mmap with 12 (Cannot allocate memory)",
  "id": "GHSA-p6xg-gj77-6vpg",
  "modified": "2024-05-21T18:31:22Z",
  "published": "2024-05-21T18:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52835"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a2a4202c60fcdffbf04f259002ce9bff39edece"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2424410f94a94d91230ced094062d859714c984a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e905e608e38cf7f8dcddcf8a6036e91a78444cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54aee5f15b83437f23b2b2469bcf21bdd9823916"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/788c0b3442ead737008934947730a6d1ff703734"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c504f615d7ed60ae035c51d0c789137ced6797f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ce4e87a8efd37c85766ec08b15e885cab08553a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd0df3f8719201dbe61a4d39083d5aecd705399a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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