Autoloading module: intpm.ko Starting background file system checks in 60 seconds. Sat Mar 16 15:55 FreeBSD/amd64 (ci-freebsd-main-5.c.syzkaller.internal) (ttyu0) Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts. 2019/03/16 15:55:12 parsed 1 programs 2019/03/16 15:55:12 executed programs: 0 login: panic: sx lock still held cpuid = 1 time = 1552751717 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002129f760 vpanic() at vpanic+0x1e0/frame 0xfffffe002129f7c0 panic() at panic+0x43/frame 0xfffffe002129f820 sx_destroy() at sx_destroy+0x5e/frame 0xfffffe002129f840 solisten_proto() at solisten_proto+0xd2/frame 0xfffffe002129f8a0 tcp6_usr_listen() at tcp6_usr_listen+0x1cc/frame 0xfffffe002129f900 solisten() at solisten+0x7a/frame 0xfffffe002129f940 kern_listen() at kern_listen+0x132/frame 0xfffffe002129f980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe002129fab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002129fab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdfffdf38, rbp = 0x2 --- KDB: enter: panic [ thread pid 2118 tid 100811 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why db>