netfilter: ipset: make sure gc is properly stopped

{
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                    "vendor": "Linux",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                        "net/netfilter/ipset/ip_set_hash_gen.h"
                    ],
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                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/ipset/ip_set_hash_gen.h"
                    ],
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                        {
                            "version": "0",
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                        {
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                        },
                        {
                            "version": "6.18.40",
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                        },
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                            "version": "7.1.5",
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                            "versionType": "original_commit_for_fix"
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                    ]
                }