riscv: fix oops caused by irqsoff latency tracer

{
  "id": "5ab994dd7667f4df94135d12871673db8f7f40a35912b308edc2d7712886585e",
  "url": "https://osv.dev/vulnerability/CVE-2022-48922",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "riscv: fix oops caused by irqsoff latency tracer",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: riscv: fix oops caused by irqsoff latency tracer The trace_hardirqs_{on,off}() require the caller to setup frame pointer properly. This because these two functions use macro 'CALLER_ADDR1' (aka. __builtin_return_address(1)) to acquire caller info. If the $fp is used for other purpose, the code generated this macro (as below) could trigger memory access fault. 0xffffffff8011510e <+80>: ld a1,-16(s0) 0xffffffff80115112 <+84>: ld s2,-8(a1) # <-- paging fault here The oops message during booting if compiled with 'irqoff' tracer enabled: [ 0.039615][ T0] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8 [ 0.041925][ T0] Oops [#1] [ 0.042063][ T0] Modules linked in: [ 0.042864][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-00233-g9a20c48d1ed2 #29 [ 0.043568][ T0] Hardware name: riscv-virtio,qemu (DT) [ 0.044343][ T0] epc : trace_hardirqs_on+0x56/0xe2 [ 0.044601][ T0] ra : restore_all+0x12/0x6e [ 0.044721][ T0] epc : ffffffff80126a5c ra : ffffffff80003b94 sp : ffffffff81403db0 [ 0.044801][ T0] gp : ffffffff8163acd8 tp : ffffffff81414880 t0 : 0000000000000020 [ 0.044882][ T0] t1 : 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0 [ 0.044967][ T0] s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100 [ 0.045046][ T0] a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000 [ 0.045124][ T0] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 00",
    "evidence": "osv:CVE-2022-48922",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.103",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.26",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48922",
      "aliases": [
        "CVE-2022-48922"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3c46979829824da5af8766d89fa877976bdae884"
                },
                {
                  "fixed": "9e2dbc31e367d08ee299a0d8aeb498cb2e12a1c3"
                },
                {
                  "fixed": "1851b9a467065b18ec2cba156eea345206df1c8f"
                },
                {
                  "fixed": "b5e180490db4af8c0f80c4b65ee482d333d0e8ee"
                },
                {
                  "fixed": "22e2100b1b07d6f5acc71cc1acb53f680c677d77"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48922.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.9.0"
                },
                {
                  "fixed": "5.10.103"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.26"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.12"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48922.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.846185717Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1851b9a467065b18ec2cba156eea345206df1c8f",
        "https://git.kernel.org/stable/c/22e2100b1b07d6f5acc71cc1acb53f680c677d77",
        "https://git.kernel.org/stable/c/9e2dbc31e367d08ee299a0d8aeb498cb2e12a1c3",
        "https://git.kernel.org/stable/c/b5e180490db4af8c0f80c4b65ee482d333d0e8ee",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48922.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48922",
        "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/2022/48xxx/CVE-2022-48922.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48922",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493171,
  "published_at": "2024-08-22T01:32:55.803+00:00"
}