CVE-2026-53164 iommu/dma: Do not try to iommu_map a 0 length region in swiotlb

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/iommu/dma-iommu.c"
    ],
    "versions": [
      {
        "version": "433a76207dcf5facc0183acb790f6e8398585258",
        "lessThan": "ab61c990a87d084f5565ee70340543e3a5394697",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "433a76207dcf5facc0183acb790f6e8398585258",
        "lessThan": "b16f8d40bac9ced838d24c9842707af9ecae92e2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "433a76207dcf5facc0183acb790f6e8398585258",
        "lessThan": "6ec91df8aff77e2e8fe3179c1f3fc15b43a40ba3",
        "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/iommu/dma-iommu.c"
    ],
    "versions": [
      {
        "version": "6.16",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.16",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.36",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.13",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]