rhashtable: clear stale iter->p on table restart

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "lib/rhashtable.c"
                    ],
                    "versions": [
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "ba510b5e9fe396497d31162acb579f210adfe6c8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "a0406c40c6638c5ae50257db6297b2fba6c9ba16",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "0955b65c2b47c30b439e2cf1b1e375073aa0413a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "c39643ad99fea749be50615550e8f0e6d6e60694",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "042fda5c088015f18838e5c692659a7be60aeb26",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "3ff7c1dbf722cf3fa538672452ba182318e0fcc3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5d240a8936f6a1d3ece06701e8c4d830a2eca8a8",
                            "lessThan": "8173f7e2ce67e6ca1d4763f3da14e5b01ce77456",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "lib/rhashtable.c"
                    ],
                    "versions": [
                        {
                            "version": "4.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.151",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.103",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.42",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.6",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }