Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. login: panic: _mtx_lock_sleep: recursed on non-recursive mutex rtentry @ /syzkaller/managers/main/kernel/sys/net/route.c:470 cpuid = 0 time = 1559575590 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0020e21fb0 vpanic() at vpanic+0x1e0/frame 0xfffffe0020e22010 panic() at panic+0x43/frame 0xfffffe0020e22070 __mtx_lock_sleep() at __mtx_lock_sleep+0x71a/frame 0xfffffe0020e22110 __mtx_lock_flags() at __mtx_lock_flags+0x157/frame 0xfffffe0020e22170 rtalloc1_fib() at rtalloc1_fib+0x16e/frame 0xfffffe0020e22280 ifa_ifwithroute() at ifa_ifwithroute+0x136/frame 0xfffffe0020e222c0 rt_getifa_fib() at rt_getifa_fib+0x255/frame 0xfffffe0020e22330 rtrequest1_fib() at rtrequest1_fib+0xe3f/frame 0xfffffe0020e22450 route_output() at route_output+0x1259/frame 0xfffffe0020e226d0 sosend_generic() at sosend_generic+0x73d/frame 0xfffffe0020e227a0 sosend() at sosend+0xc6/frame 0xfffffe0020e22810 kern_sendit() at kern_sendit+0x35e/frame 0xfffffe0020e228c0 sendit() at sendit+0x225/frame 0xfffffe0020e22920 sys_sendto() at sys_sendto+0x5c/frame 0xfffffe0020e22980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0020e22ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0020e22ab0 --- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c38a, rsp = 0x7fffffffead8, rbp = 0x7fffffffeb40 --- KDB: enter: panic [ thread pid 759 tid 100081 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why