CVE-2025-71160 netfilter: nf_tables: avoid chain re-validation if possible

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: avoid chain re-validation if possible Hamza Mahfooz reports cpu soft lock-ups in nftchainvalidate: watchdog: BUG: soft lockup - CPU1 stuck for 27s! iptables-nft-re:37547 .. RIP: 0010:nftchainvalidate+0xcb/0x1...