net/mlx5: Fix command bitmask initialization

{
  "id": "2ead7679522bfbca3a4c54ccd8d2e4b6b8da328c8516d9ac41865110959c4934",
  "url": "https://osv.dev/vulnerability/CVE-2024-50147",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net/mlx5: Fix command bitmask initialization",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix command bitmask initialization Command bitmask have a dedicated bit for MANAGE_PAGES command, this bit isn't Initialize during command bitmask Initialization, only during MANAGE_PAGES. In addition, mlx5_cmd_trigger_completions() is trying to trigger completion for MANAGE_PAGES command as well. Hence, in case health error occurred before any MANAGE_PAGES command have been invoke (for example, during mlx5_enable_hca()), mlx5_cmd_trigger_completions() will try to trigger completion for MANAGE_PAGES command, which will result in null-ptr-deref error.[1] Fix it by Initialize command bitmask correctly. While at it, re-write the code for better understanding. [1] BUG: KASAN: null-ptr-deref in mlx5_cmd_trigger_completions+0x1db/0x600 [mlx5_core] Write of size 4 at addr 0000000000000214 by task kworker/u96:2/12078 CPU: 10 PID: 12078 Comm: kworker/u96:2 Not tainted 6.9.0-rc2_for_upstream_debug_2024_04_07_19_01 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Workqueue: mlx5_health0000:08:00.0 mlx5_fw_fatal_reporter_err_work [mlx5_core] Call Trace: dump_stack_lvl+0x7e/0xc0 kasan_report+0xb9/0xf0 kasan_check_range+0xec/0x190 mlx5_cmd_trigger_completions+0x1db/0x600 [mlx5_core] mlx5_cmd_flush+0x94/0x240 [mlx5_core] enter_error_state+0x6c/0xd0 [mlx5_core] mlx5_fw_fatal_reporter_err_work+0xf3/0x480 [mlx5_core] process_one_work+0x787/0x1490 ? lo",
    "evidence": "osv:CVE-2024-50147",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.115",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.59",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-50147",
      "aliases": [
        "CVE-2024-50147"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9b98d395b85dd042fe83fb696b1ac02e6c93a520"
                },
                {
                  "fixed": "d1606090bb294cecb7de3c4ed177f5aa0abd4c4e"
                },
                {
                  "fixed": "d88564c79d1cedaf2655f12261eca0d2796bde4e"
                },
                {
                  "fixed": "2feac1e562be0efc621a6722644a90f355d53473"
                },
                {
                  "fixed": "d62b14045c6511a7b2d4948d1a83a4e592deeb05"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50147.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.115"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.59"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.11.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50147.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.523375635Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2feac1e562be0efc621a6722644a90f355d53473",
        "https://git.kernel.org/stable/c/d1606090bb294cecb7de3c4ed177f5aa0abd4c4e",
        "https://git.kernel.org/stable/c/d62b14045c6511a7b2d4948d1a83a4e592deeb05",
        "https://git.kernel.org/stable/c/d88564c79d1cedaf2655f12261eca0d2796bde4e",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50147.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-50147",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50147.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-50147",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496001,
  "published_at": "2024-11-07T09:31:24.151+00:00"
}