panic: Most recently used by tty cpuid = 0 time = 42 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002884a690 vpanic() at vpanic+0x1e0/frame 0xfffffe002884a6f0 panic() at panic+0x43/frame 0xfffffe002884a750 mtrash_ctor() at mtrash_ctor+0xed/frame 0xfffffe002884a790 uma_zalloc_arg() at uma_zalloc_arg+0x1036/frame 0xfffffe002884a840 malloc() at malloc+0xe1/frame 0xfffffe002884a8b0 tty_alloc_mutex() at tty_alloc_mutex+0x22c/frame 0xfffffe002884a8e0 pts_alloc() at pts_alloc+0x179/frame 0xfffffe002884a930 sys_posix_openpt() at sys_posix_openpt+0x94/frame 0xfffffe002884a970 ia32_syscall() at ia32_syscall+0x452/frame 0xfffffe002884aab0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xa KDB: enter: panic [ thread pid 6033 tid 101426 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why