tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()

{
  "id": "605df37ce40e7c0284fac0089e5976230ef787c3c22b1b5d212c80860608229d",
  "url": "https://osv.dev/vulnerability/CVE-2022-49797",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit() When trace_get_event_file() failed, gen_kretprobe_test will be assigned as the error code. If module kprobe_event_gen_test is removed now, the null pointer dereference will happen in kprobe_event_gen_test_exit(). Check if gen_kprobe_test or gen_kretprobe_test is error code or NULL before dereference them. BUG: kernel NULL pointer dereference, address: 0000000000000012 PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 3 PID: 2210 Comm: modprobe Not tainted 6.1.0-rc1-00171-g2159299a3b74-dirty #217 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 RIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test] Code: Unable to access opcode bytes at 0xffffffff9ffffff2. RSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246 RAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 0000000000000000 RDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c RBP: ffffffffa0000000 R08: 0000000000000004 R09: 00000000001e95c0 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000800 R13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f56b75be540(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0 DR0: 0000000000000000 DR1: 0000",
    "evidence": "osv:CVE-2022-49797",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.156",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49797",
      "aliases": [
        "CVE-2022-49797"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "64836248dda20c8e7427b493f7e06d9bf8f58850"
                },
                {
                  "fixed": "bb70fcae4115d24b7e8cee17a6da8b1943f546bb"
                },
                {
                  "fixed": "3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332"
                },
                {
                  "fixed": "fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d"
                },
                {
                  "fixed": "e0d75267f59d7084e0468bd68beeb1bf9c71d7c0"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49797.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.6.0"
                },
                {
                  "fixed": "5.10.156"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.80"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.0.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49797.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.655621413Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332",
        "https://git.kernel.org/stable/c/bb70fcae4115d24b7e8cee17a6da8b1943f546bb",
        "https://git.kernel.org/stable/c/e0d75267f59d7084e0468bd68beeb1bf9c71d7c0",
        "https://git.kernel.org/stable/c/fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49797.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49797",
        "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-2022-49797.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49797",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 510265,
  "published_at": "2025-05-01T14:09:26.998+00:00"
}