ghsa-c2cr-w322-fppq
Vulnerability from github
Published
2025-04-08 09:31
Modified
2025-11-03 21:33
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

RDMA/hns: Fix soft lockup during bt pages loop

Driver runs a for-loop when allocating bt pages and mapping them with buffer pages. When a large buffer (e.g. MR over 100GB) is being allocated, it may require a considerable loop count. This will lead to soft lockup:

    watchdog: BUG: soft lockup - CPU#27 stuck for 22s!
    ...
    Call trace:
     hem_list_alloc_mid_bt+0x124/0x394 [hns_roce_hw_v2]
     hns_roce_hem_list_request+0xf8/0x160 [hns_roce_hw_v2]
     hns_roce_mtr_create+0x2e4/0x360 [hns_roce_hw_v2]
     alloc_mr_pbl+0xd4/0x17c [hns_roce_hw_v2]
     hns_roce_reg_user_mr+0xf8/0x190 [hns_roce_hw_v2]
     ib_uverbs_reg_mr+0x118/0x290

    watchdog: BUG: soft lockup - CPU#35 stuck for 23s!
    ...
    Call trace:
     hns_roce_hem_list_find_mtt+0x7c/0xb0 [hns_roce_hw_v2]
     mtr_map_bufs+0xc4/0x204 [hns_roce_hw_v2]
     hns_roce_mtr_create+0x31c/0x3c4 [hns_roce_hw_v2]
     alloc_mr_pbl+0xb0/0x160 [hns_roce_hw_v2]
     hns_roce_reg_user_mr+0x108/0x1c0 [hns_roce_hw_v2]
     ib_uverbs_reg_mr+0x120/0x2bc

Add a cond_resched() to fix soft lockup during these loops. In order not to affect the allocation performance of normal-size buffer, set the loop count of a 100GB MR as the threshold to call cond_resched().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22010"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-08T09:15:24Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hns: Fix soft lockup during bt pages loop\n\nDriver runs a for-loop when allocating bt pages and mapping them with\nbuffer pages. When a large buffer (e.g. MR over 100GB) is being allocated,\nit may require a considerable loop count. This will lead to soft lockup:\n\n        watchdog: BUG: soft lockup - CPU#27 stuck for 22s!\n        ...\n        Call trace:\n         hem_list_alloc_mid_bt+0x124/0x394 [hns_roce_hw_v2]\n         hns_roce_hem_list_request+0xf8/0x160 [hns_roce_hw_v2]\n         hns_roce_mtr_create+0x2e4/0x360 [hns_roce_hw_v2]\n         alloc_mr_pbl+0xd4/0x17c [hns_roce_hw_v2]\n         hns_roce_reg_user_mr+0xf8/0x190 [hns_roce_hw_v2]\n         ib_uverbs_reg_mr+0x118/0x290\n\n        watchdog: BUG: soft lockup - CPU#35 stuck for 23s!\n        ...\n        Call trace:\n         hns_roce_hem_list_find_mtt+0x7c/0xb0 [hns_roce_hw_v2]\n         mtr_map_bufs+0xc4/0x204 [hns_roce_hw_v2]\n         hns_roce_mtr_create+0x31c/0x3c4 [hns_roce_hw_v2]\n         alloc_mr_pbl+0xb0/0x160 [hns_roce_hw_v2]\n         hns_roce_reg_user_mr+0x108/0x1c0 [hns_roce_hw_v2]\n         ib_uverbs_reg_mr+0x120/0x2bc\n\nAdd a cond_resched() to fix soft lockup during these loops. In order not\nto affect the allocation performance of normal-size buffer, set the loop\ncount of a 100GB MR as the threshold to call cond_resched().",
  "id": "GHSA-c2cr-w322-fppq",
  "modified": "2025-11-03T21:33:30Z",
  "published": "2025-04-08T09:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22010"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13a52f6c9ff99f7d88f81da535cb4e85eade662b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/25655580136de59ec89f09089dd28008ea440fc9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4104b0023ff66b5df900d23dbf38310893deca79"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/461eb4ddede266df8f181f578732bb01742c3fd6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/975355faba56c0751292ed15a90c3e2c7dc0aad6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ab20fec7a1ce3057ad86afd27bfd08420b7cd11"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efe544462fc0b499725364f90bd0f8bbf16f861a"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "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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