On 18.04.2017 01:49, Julian K. wrote: > I wrote a kernel module [1] for a the fastd UDP tunneling protocol. Like > the if_tun it calls if_purgeaddrs() on destruction of interfaces. When I > delete IPFW rules a the same time the kernel runs into a deadlock. It > seems to be a general problem that also affects other network drivers. > > Could someone please take a closer look at this issue? Below I attached > some debugging outputs.
> ipfw_chk() at ipfw_chk+0xa42/frame 0xfffffe0098192ee0 > ipfw_check_packet() at ipfw_check_packet+0xeb/frame 0xfffffe0098193040 > pfil_run_hooks() at pfil_run_hooks+0x83/frame 0xfffffe00981930d0 > ip_output() at ip_output+0xdd7/frame 0xfffffe0098193220 > icmp_reflect() at icmp_reflect+0x553/frame 0xfffffe00981932e0 > icmp_error() at icmp_error+0x525/frame 0xfffffe0098193330 > ipfw_chk() at ipfw_chk+0x30bb/frame 0xfffffe0098193520 > ipfw_check_packet() at ipfw_check_packet+0xeb/frame 0xfffffe0098193680 > pfil_run_hooks() at pfil_run_hooks+0x83/frame 0xfffffe0098193710 > ip_input() at ip_input+0x39d/frame 0xfffffe0098193770 > netisr_dispatch_src() at netisr_dispatch_src+0xa5/frame 0xfffffe00981937d0 What FreeBSD version do you use? There were several changes in head/ and stable/11, that could change this behavior. Can you try the same on recent revision? -- WBR, Andrey V. Elsukov
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