6.1.190 (longterm, Branch 6.1)

Linux kernel release 6.1.190 (longterm) focused primarily on networking stability and security fixes, particularly within the IPv4 stack and netfilter subsystem. Key security fixes included addressing a use-after-free vulnerability by freeing inet_opt and ireq_opt only after an RCU grace period, and validating checksum_start before completing checksum calculations to prevent potential memory corruption or crashes. Additionally, a regression affecting netfilter's nfnetlink_queue component was resolved to restore proper SCTP traffic handling. Overall, this release emphasized hardening the IPv4 networking code and fixing recent regressions in packet filtering functionality.