Date: Thu, 5 May 2022 18:54:41 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: freebsd-net@FreeBSD.org Subject: vtnet may sleep with the following non-sleepable locks held Message-ID: <alpine.BSF.2.00.2205051849180.68830@ai.fobar.qr>
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Hi, not sure if the problem is from f0d8d352c06ff or older or newer in fact. I see this when enabled IPv6 on vtnet on main with GENERIC and do a rtsol vtnet0: Invoking IPv6 network device address event may sleep with the following non-sleepable locks held: exclusive sleep mutex vtnet0-rx0 (vtnet0-rx0) r = 0 (0xfffff80001793480) locked @ /main_clean_for_test/sys/dev/virtio/network/if_vtnet.c:2198 stack backtrace: #0 0xffffffff80c80405 at witness_debugger+0x65 #1 0xffffffff80c8155a at witness_warn+0x3ea #2 0xffffffff80e2263d at in6_update_ifa+0xd7d #3 0xffffffff80e4db5d at in6_ifadd+0x1fd #4 0xffffffff80e4a0a8 at nd6_ra_input+0xfb8 #5 0xffffffff80e1d01b at icmp6_input+0x76b #6 0xffffffff80e351bf at ip6_input+0xc2f #7 0xffffffff80d5cd9f at netisr_dispatch_src+0xaf #8 0xffffffff80d3f03e at ether_demux+0x16e #9 0xffffffff80d406cc at ether_nh_input+0x3fc #10 0xffffffff80d5cd9f at netisr_dispatch_src+0xaf #11 0xffffffff80d3f509 at ether_input+0x99 #12 0xffffffff80a3d1c3 at vtnet_rxq_eof+0x763 #13 0xffffffff80a3c9b7 at vtnet_rx_vq_process+0x97 #14 0xffffffff80bc91a9 at ithread_loop+0x279 #15 0xffffffff80bc5840 at fork_exit+0x80 #16 0xffffffff810c3cae at fork_trampoline+0xe lock order reversal: (sleepable after non-sleepable) 1st 0xfffff80001793480 vtnet0-rx0 (vtnet0-rx0, sleep mutex) @ /main_clean_for_test/sys/dev/virtio/network/if_vtnet.c:2198 2nd 0xffffffff81fb1ec8 in6_multi_sx (in6_multi_sx, sx) @ /main_clean_for_test/sys/netinet6/in6_mcast.c:1193 lock order vtnet0-rx0 -> in6_multi_sx attempted at: #0 0xffffffff80c7ffcd at witness_checkorder+0xbdd #1 0xffffffff80c19093 at _sx_xlock+0x63 #2 0xffffffff80e2b451 at in6_joingroup+0x31 #3 0xffffffff80e229d8 at in6_update_ifa+0x1118 #4 0xffffffff80e4db5d at in6_ifadd+0x1fd #5 0xffffffff80e4a0a8 at nd6_ra_input+0xfb8 #6 0xffffffff80e1d01b at icmp6_input+0x76b #7 0xffffffff80e351bf at ip6_input+0xc2f #8 0xffffffff80d5cd9f at netisr_dispatch_src+0xaf #9 0xffffffff80d3f03e at ether_demux+0x16e #10 0xffffffff80d406cc at ether_nh_input+0x3fc #11 0xffffffff80d5cd9f at netisr_dispatch_src+0xaf #12 0xffffffff80d3f509 at ether_input+0x99 #13 0xffffffff80a3d1c3 at vtnet_rxq_eof+0x763 #14 0xffffffff80a3c9b7 at vtnet_rx_vq_process+0x97 #15 0xffffffff80bc91a9 at ithread_loop+0x279 #16 0xffffffff80bc5840 at fork_exit+0x80 #17 0xffffffff810c3cae at fork_trampoline+0xe -- Bjoern A. Zeeb r15:7
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