Issue #2660 has been reported by shamaz. ---------------------------------------- Bug #2660: Use of IPDIVERT causes kernel crashes http://bugs.dragonflybsd.org/issues/2660
* Author: shamaz * Status: New * Priority: Normal * Assignee: * Category: * Target version: ---------------------------------------- Hello. I was trying to set up NAT on DragonFly machine and got a crash. I have a following configuration: 1) Machine A with DragonFlyBSD 3.4 2) Machine B (the one which crashes) with DragonFlyBSD 3.6.1.24.gd9a9-RELEASE x86_64 (from git branch DragonFly_RELEASE_3_6) 3) Machine C is a vkernel machine hosted by B Machine B kernel was compiled with following lines in config: IPFIREWALL IPFIREWALL_VERBOSE IPFIREWALL_VERBOSE_LIMIT=100 IPFIREWALL_DEFAULT_TO_ACCEPT IPDIVERT Machine B has 2 network interfaces: nfe0 (with connection to A) and tap0 (with connection to C) configured as follows: $ ifconfig nfe0 192.168.10.1 netmask 255.255.255.0 up (A has an address 192.168.10.2 assigned to re0 which is the interface on the other side) $ ifconfig tap0 192.168.20.1 netmask 255.255.255.0 up (C has an address 192.168.20.2 assigned to vke0) So I do as follows: On machine A: $ route add default 192.168.10.1 On machine B: $ sysctl net.inet.ip.forwarding=1 $ ipfw -f flush (accept all because of line in config) $ natd -interface tap0 $ ipfw add 100 divert natd ip from any to any in via tap0 $ ipfw add 110 divert natd ip from any to any out via tap0 Again, on machine A: $ ping 192.168.20.2 Machine B crashes. 100% repeatable Here is a part of the backtrace: #11 0xffffffff8092429f in calltrap () at /usr/src/sys/platform/pc64/x86_64/exception.S:188 #12 0xffffffff80673d22 in ip_input (m=m@entry=0xffffffe0f49ce800) at /usr/src/sys/netinet/ip_input.c:684 #13 0xffffffff8066813a in div_output (control=<optimized out>, sin=0xffffffe0f605a130, m=0xffffffe0f49ce800, so=0xffffffe0bf0ff7c0) at /usr/src/sys/netinet/ip_divert.c:373 #14 div_send (msg=0xffffffe0f54896a0) at /usr/src/sys/netinet/ip_divert.c:514 #15 0xffffffff8061be6a in netmsg_service_loop (arg=<optimized out>) at /usr/src/sys/net/netisr.c:319 #16 0xffffffff80571c57 in lwkt_deschedule_self (td=<optimized out>) at /usr/src/sys/kern/lwkt_thread.c:327 Crash dump (129 Mb) is here: https://drive.google.com/uc?id=0B1NArWn4pLpxazAxYjJOQVRMeGM&export=download Vasily -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: http://bugs.dragonflybsd.org/my/account