GHSA-GHFF-7R8P-2PR4

Vulnerability from github – Published: 2024-11-09 12:30 – Updated: 2024-11-13 18:31
VLAI
Details

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

iio: gts-helper: Fix memory leaks in iio_gts_build_avail_scale_table()

modprobe iio-test-gts and rmmod it, then the following memory leak occurs:

unreferenced object 0xffffff80c810be00 (size 64):
  comm "kunit_try_catch", pid 1654, jiffies 4294913981
  hex dump (first 32 bytes):
    02 00 00 00 08 00 00 00 20 00 00 00 40 00 00 00  ........ ...@...
    80 00 00 00 00 02 00 00 00 04 00 00 00 08 00 00  ................
  backtrace (crc a63d875e):
    [<0000000028c1b3c2>] kmemleak_alloc+0x34/0x40
    [<000000001d6ecc87>] __kmalloc_noprof+0x2bc/0x3c0
    [<00000000393795c1>] devm_iio_init_iio_gts+0x4b4/0x16f4
    [<0000000071bb4b09>] 0xffffffdf052a62e0
    [<000000000315bc18>] 0xffffffdf052a6488
    [<00000000f9dc55b5>] kunit_try_run_case+0x13c/0x3ac
    [<00000000175a3fd4>] kunit_generic_run_threadfn_adapter+0x80/0xec
    [<00000000f505065d>] kthread+0x2e8/0x374
    [<00000000bbfb0e5d>] ret_from_fork+0x10/0x20
unreferenced object 0xffffff80cbfe9e70 (size 16):
  comm "kunit_try_catch", pid 1658, jiffies 4294914015
  hex dump (first 16 bytes):
    10 00 00 00 40 00 00 00 80 00 00 00 00 00 00 00  ....@...........
  backtrace (crc 857f0cb4):
    [<0000000028c1b3c2>] kmemleak_alloc+0x34/0x40
    [<000000001d6ecc87>] __kmalloc_noprof+0x2bc/0x3c0
    [<00000000393795c1>] devm_iio_init_iio_gts+0x4b4/0x16f4
    [<0000000071bb4b09>] 0xffffffdf052a62e0
    [<000000007d089d45>] 0xffffffdf052a6864
    [<00000000f9dc55b5>] kunit_try_run_case+0x13c/0x3ac
    [<00000000175a3fd4>] kunit_generic_run_threadfn_adapter+0x80/0xec
    [<00000000f505065d>] kthread+0x2e8/0x374
    [<00000000bbfb0e5d>] ret_from_fork+0x10/0x20
......

It includes 55 times "size 64" memory leaks, which correspond to 5 times test_init_iio_gain_scale() calls with gts_test_gains size 10 (10size(int)) and gts_test_itimes size 5. It also includes 51 times "size 16" memory leak, which correspond to one time __test_init_iio_gain_scale() call with gts_test_gains_gain_low size 3 (3size(int)) and gts_test_itimes size 5.

The reason is that the per_time_gains[i] is not freed which is allocated in the "gts->num_itime" for loop in iio_gts_build_avail_scale_table().

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2024-50231"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-09T11:15:09Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: gts-helper: Fix memory leaks in iio_gts_build_avail_scale_table()\n\nmodprobe iio-test-gts and rmmod it, then the following memory leak\noccurs:\n\n\tunreferenced object 0xffffff80c810be00 (size 64):\n\t  comm \"kunit_try_catch\", pid 1654, jiffies 4294913981\n\t  hex dump (first 32 bytes):\n\t    02 00 00 00 08 00 00 00 20 00 00 00 40 00 00 00  ........ ...@...\n\t    80 00 00 00 00 02 00 00 00 04 00 00 00 08 00 00  ................\n\t  backtrace (crc a63d875e):\n\t    [\u003c0000000028c1b3c2\u003e] kmemleak_alloc+0x34/0x40\n\t    [\u003c000000001d6ecc87\u003e] __kmalloc_noprof+0x2bc/0x3c0\n\t    [\u003c00000000393795c1\u003e] devm_iio_init_iio_gts+0x4b4/0x16f4\n\t    [\u003c0000000071bb4b09\u003e] 0xffffffdf052a62e0\n\t    [\u003c000000000315bc18\u003e] 0xffffffdf052a6488\n\t    [\u003c00000000f9dc55b5\u003e] kunit_try_run_case+0x13c/0x3ac\n\t    [\u003c00000000175a3fd4\u003e] kunit_generic_run_threadfn_adapter+0x80/0xec\n\t    [\u003c00000000f505065d\u003e] kthread+0x2e8/0x374\n\t    [\u003c00000000bbfb0e5d\u003e] ret_from_fork+0x10/0x20\n\tunreferenced object 0xffffff80cbfe9e70 (size 16):\n\t  comm \"kunit_try_catch\", pid 1658, jiffies 4294914015\n\t  hex dump (first 16 bytes):\n\t    10 00 00 00 40 00 00 00 80 00 00 00 00 00 00 00  ....@...........\n\t  backtrace (crc 857f0cb4):\n\t    [\u003c0000000028c1b3c2\u003e] kmemleak_alloc+0x34/0x40\n\t    [\u003c000000001d6ecc87\u003e] __kmalloc_noprof+0x2bc/0x3c0\n\t    [\u003c00000000393795c1\u003e] devm_iio_init_iio_gts+0x4b4/0x16f4\n\t    [\u003c0000000071bb4b09\u003e] 0xffffffdf052a62e0\n\t    [\u003c000000007d089d45\u003e] 0xffffffdf052a6864\n\t    [\u003c00000000f9dc55b5\u003e] kunit_try_run_case+0x13c/0x3ac\n\t    [\u003c00000000175a3fd4\u003e] kunit_generic_run_threadfn_adapter+0x80/0xec\n\t    [\u003c00000000f505065d\u003e] kthread+0x2e8/0x374\n\t    [\u003c00000000bbfb0e5d\u003e] ret_from_fork+0x10/0x20\n\t......\n\nIt includes 5*5 times \"size 64\" memory leaks, which correspond to 5 times\ntest_init_iio_gain_scale() calls with gts_test_gains size 10 (10*size(int))\nand gts_test_itimes size 5. It also includes 5*1 times \"size 16\"\nmemory leak, which correspond to one time __test_init_iio_gain_scale()\ncall with gts_test_gains_gain_low size 3 (3*size(int)) and gts_test_itimes\nsize 5.\n\nThe reason is that the per_time_gains[i] is not freed which is allocated in\nthe \"gts-\u003enum_itime\" for loop in iio_gts_build_avail_scale_table().",
  "id": "GHSA-ghff-7r8p-2pr4",
  "modified": "2024-11-13T18:31:53Z",
  "published": "2024-11-09T12:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50231"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16e41593825c3044efca0eb34b2d6ffba306e4ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38d6e8be234d87b0eedca50309e25051888b39d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/691e79ffc42154a9c91dc3b7e96a307037b4be74"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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