SUNRPC: lock against ->sock changing during sysfs read

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sunrpc/sysfs.c",
                        "net/sunrpc/xprtsock.c"
                    ],
                    "versions": [
                        {
                            "version": "21a2be1a5145d072deedc7cdc5b2d17380abea75",
                            "lessThan": "cd366b9091a3e6ed8229e4b908e895d20b527dc0",
                            "status": "affected",
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                        },
                        {
                            "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61",
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                            "status": "affected",
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                        },
                        {
                            "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61",
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                            "status": "affected",
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                        },
                        {
                            "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61",
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                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "77876473912d1bf1ed16bffa1674e5ff0f499f25",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.67",
                            "lessThan": "5.10.271",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.13.19",
                            "lessThan": "5.14",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sunrpc/sysfs.c",
                        "net/sunrpc/xprtsock.c"
                    ],
                    "versions": [
                        {
                            "version": "5.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.16.10",
                            "lessThanOrEqual": "5.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.17",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }