CVE-2026-93260 powerpc/xive: propagate IPI init errors to prevent use-after-free

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/powerpc/platforms/powernv/smp.c",
      "arch/powerpc/platforms/pseries/smp.c",
      "arch/powerpc/sysdev/xive/common.c"
    ],
    "versions": [
      {
        "version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
        "lessThan": "c554a8d376d5aea1b237ed6bef6f9fbfc550e67f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
        "lessThan": "411a3c016e7a95f5fa105a0587e07d0647a77727",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/powerpc/platforms/powernv/smp.c",
      "arch/powerpc/platforms/pseries/smp.c",
      "arch/powerpc/sysdev/xive/common.c"
    ],
    "versions": [
      {
        "version": "4.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.6",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]