Date: Mon, 17 Sep 2018 15:27:56 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: freebsd-net@freebsd.org, freebsd-current@freebsd.org Subject: vtnet + gif (IPv4 in IPv4) + iperf3 leads to crash on ALPHA6 Message-ID: <b8a9e4b3-fac2-8eef-1c16-5a04a9082935@FreeBSD.org>
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I'm preparing some benchmarking setup, which includes gif tunnel from FreeBSD to FreeBSD, where one end is 12.0-ALPHA6/r338707 installed as guest in VirtualBox with virtual NIC (vtnet). This tunnel works for simple pings, but when I run iperf3 on this "link" ALPHA4 system crashes. It is 100% reproducible for me. panic: Assertion !in_epoch(net_epoch_preempt) && !mtx_owned(&(&(tcbinfo))->ipi_lock) failed at /data/src/sys/netinet/tcp_input.c:803 cpuid = 0 time = 1537187018 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe000044a310 vpanic() at vpanic+0x1a3/frame 0xfffffe000044a370 panic() at panic+0x43/frame 0xfffffe000044a3d0 tcp_input() at tcp_input+0x16a9/frame 0xfffffe000044a520 ip_input() at ip_input+0x126/frame 0xfffffe000044a5a0 netisr_dispatch_src() at netisr_dispatch_src+0x83/frame 0xfffffe000044a600 gif_input() at gif_input+0x2db/frame 0xfffffe000044a640 in_gif_input() at in_gif_input+0x73/frame 0xfffffe000044a680 encap_input() at encap_input+0x1cf/frame 0xfffffe000044a6f0 encap4_input() at encap4_input+0x28/frame 0xfffffe000044a720 ip_input() at ip_input+0x126/frame 0xfffffe000044a7a0 netisr_dispatch_src() at netisr_dispatch_src+0x83/frame 0xfffffe000044a800 ether_demux() at ether_demux+0x15e/frame 0xfffffe000044a830 ether_nh_input() at ether_nh_input+0x373/frame 0xfffffe000044a880 netisr_dispatch_src() at netisr_dispatch_src+0x83/frame 0xfffffe000044a8e0 ether_input() at ether_input+0x42/frame 0xfffffe000044a900 vtnet_rxq_eof() at vtnet_rxq_eof+0x736/frame 0xfffffe000044a9a0 vtnet_rx_vq_intr() at vtnet_rx_vq_intr+0x58/frame 0xfffffe000044a9d0 vtpci_legacy_intr() at vtpci_legacy_intr+0xb0/frame 0xfffffe000044aa10 ithread_loop() at ithread_loop+0x140/frame 0xfffffe000044aa70 fork_exit() at fork_exit+0x84/frame 0xfffffe000044aab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe000044aab0 -- // Lev Serebryakov
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