igc: Reinstate IGC_REMOVED logic and implement it properly

{
  "id": "f014fe03ce59796f2a6cfc1ef30705841a9fc326380f26bf1d5e3b371cf8e255",
  "url": "https://osv.dev/vulnerability/CVE-2022-49605",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "igc: Reinstate IGC_REMOVED logic and implement it properly",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: igc: Reinstate IGC_REMOVED logic and implement it properly The initially merged version of the igc driver code (via commit 146740f9abc4, \"igc: Add support for PF\") contained the following IGC_REMOVED checks in the igc_rd32/wr32() MMIO accessors: u32 igc_rd32(struct igc_hw *hw, u32 reg) { u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr); u32 value = 0; if (IGC_REMOVED(hw_addr)) return ~value; value = readl(&hw_addr[reg]); /* reads should not return all F's */ if (!(~value) && (!reg || !(~readl(hw_addr)))) hw->hw_addr = NULL; return value; } And: #define wr32(reg, val) \\ do { \\ u8 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \\ if (!IGC_REMOVED(hw_addr)) \\ writel((val), &hw_addr[(reg)]); \\ } while (0) E.g. igb has similar checks in its MMIO accessors, and has a similar macro E1000_REMOVED, which is implemented as follows: #define E1000_REMOVED(h) unlikely(!(h)) These checks serve to detect and take note of an 0xffffffff MMIO read return from the device, which can be caused by a PCIe link flap or some other kind of PCI bus error, and to avoid performing MMIO reads and writes from that point onwards. However, the IGC_REMOVED macro was not originally implemented: #ifndef IGC_REMOVED #define IGC_REMOVED(a) (0) #endif /* IGC_REMOVED */ This led to the IGC_REMOVED logic to be removed entirely in a subsequent commit (commit 3c215fb18e70, \"igc: remove IGC_REMOVED function\"), with the rationale that such checks matter only f",
    "evidence": "osv:CVE-2022-49605",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.208",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.134",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.58",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.15",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49605",
      "aliases": [
        "CVE-2022-49605"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "146740f9abc4976e4f0af1aa302efee1c699d2e4"
                },
                {
                  "fixed": "16cb6717f4f42487ef10583eb8bc98e7d1e33d65"
                },
                {
                  "fixed": "77836dbe35382aaf8108489060c5c89530c77494"
                },
                {
                  "fixed": "e75b73081f1ec169518773626c2ff3950476660b"
                },
                {
                  "fixed": "70965b6e5c03aa70cc754af1226b9f9cde0c4bf3"
                },
                {
                  "fixed": "7c1ddcee5311f3315096217881d2dbe47cc683f9"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49605.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.20.0"
                },
                {
                  "fixed": "5.4.208"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.134"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.58"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.18.15"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49605.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.113733945Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/16cb6717f4f42487ef10583eb8bc98e7d1e33d65",
        "https://git.kernel.org/stable/c/70965b6e5c03aa70cc754af1226b9f9cde0c4bf3",
        "https://git.kernel.org/stable/c/77836dbe35382aaf8108489060c5c89530c77494",
        "https://git.kernel.org/stable/c/7c1ddcee5311f3315096217881d2dbe47cc683f9",
        "https://git.kernel.org/stable/c/e75b73081f1ec169518773626c2ff3950476660b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49605.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49605",
        "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/2022/49xxx/CVE-2022-49605.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49605",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 508836,
  "published_at": "2025-02-26T02:23:30.873+00:00"
}