login: panic: ASan: Invalid access, 4-byte read at 0xfffffe006e5b93f0, UMAUseAfterFree(fd) cpuid = 0 time = 1728088971 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056e9e7b0 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056e9e910 vpanic() at vpanic+0x280/frame 0xfffffe0056e9ead0 panic() at panic+0xb5/frame 0xfffffe0056e9eba0 kasan_report() at kasan_report+0xdf/frame 0xfffffe0056e9ec70 __mtx_lock_flags() at __mtx_lock_flags+0x13e/frame 0xfffffe0056e9ed50 sctp_sendall_completes() at sctp_sendall_completes+0x41/frame 0xfffffe0056e9ed70 sctp_iterator_worker() at sctp_iterator_worker+0x1022/frame 0xfffffe0056e9eed0 sctp_iterator_thread() at sctp_iterator_thread+0x5e/frame 0xfffffe0056e9eef0 fork_exit() at fork_exit+0xcc/frame 0xfffffe0056e9ef30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056e9ef30 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 5 tid 100068 ] Stopped at kdb_enter+0x6e: movq $0,0x23e1277(%rip) db> db>