CVE-2021-47272 usb: dwc3: gadget: Bail from dwc3_gadget_exit() if dwc->gadget is NULL

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/dwc3/gadget.c"
    ],
    "versions": [
      {
        "version": "e81a7018d93a7de31a3f121c9a7eecd0a5ec58b0",
        "lessThan": "851dee5a5da56564a70290713aee665403bb0b24",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e81a7018d93a7de31a3f121c9a7eecd0a5ec58b0",
        "lessThan": "4aad390363d2b9b3e92428dd34d27bb7ea8f1ee8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e81a7018d93a7de31a3f121c9a7eecd0a5ec58b0",
        "lessThan": "03715ea2e3dbbc56947137ce3b4ac18a726b2f87",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/dwc3/gadget.c"
    ],
    "versions": [
      {
        "version": "5.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.10",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.44",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.12.11",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]