Date: Fri, 09 Jul 2021 00:15:41 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 257067] panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if_vlan.c:1185 Message-ID: <bug-257067-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257067 Bug ID: 257067 Summary: panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if_vlan.c:1185 Product: Base System Version: 13.0-STABLE Hardware: arm64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: niels=3Dfreebsd@bakker.net # cd /var/crash && kgdb /boot/kernel/kernel vmcore.last GNU gdb (GDB) 10.2 [GDB v10.2 for FreeBSD] Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.htm= l> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-portbld-freebsd13.0". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /boot/kernel/kernel... Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug... Unread portion of the kernel message buffer: panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if_vlan.c:1185 cpuid =3D 1 time =3D 1625786527 KDB: stack backtrace: #0 0xffffffff80bfece5 at kdb_backtrace+0x65 #1 0xffffffff80bb46d1 at vpanic+0x181 #2 0xffffffff80bb44a3 at panic+0x43 #3 0xffffffff80cd88de at vlan_transmit+0x1de #4 0xffffffff80cce39b at ether_output_frame+0xab #5 0xffffffff8210c6d8 at ng_apply_item+0xa8 #6 0xffffffff8210c45e at ng_snd_item+0x2ce #7 0xffffffff835247f2 at ng_pppoe_disconnect+0x152 #8 0xffffffff8210ac23 at ng_destroy_hook+0x1e3 #9 0xffffffff8210c729 at ng_apply_item+0xf9 #10 0xffffffff8210c45e at ng_snd_item+0x2ce #11 0xffffffff8210aae9 at ng_destroy_hook+0xa9 #12 0xffffffff8210a8c5 at ng_rmnode+0x65 #13 0xffffffff8210cb03 at ng_apply_item+0x4d3 #14 0xffffffff8210c45e at ng_snd_item+0x2ce #15 0xffffffff82f35dcf at ngc_send+0x1af #16 0xffffffff80c51c47 at sosend_generic+0x5f7 #17 0xffffffff80c51f56 at sosend+0x66 Uptime: 7d5h6m15s Dumping 3807 out of 16148 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..= 91% __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55 55 __asm("movq %%gs:%P1,%0" : "=3Dr" (td) : "n" (offsetof(stru= ct pcpu, (kgdb) bt #0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55 #1 doadump (textdump=3D<optimized out>) at /usr/src/sys/kern/kern_shutdown= .c:399 #2 0xffffffff80bb42fa in kern_reboot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:486 #3 0xffffffff80bb4740 in vpanic (fmt=3D<optimized out>, ap=3D<optimized ou= t>) at /usr/src/sys/kern/kern_shutdown.c:919 #4 0xffffffff80bb44a3 in panic (fmt=3D<unavailable>) at /usr/src/sys/kern/kern_shutdown.c:843 #5 0xffffffff80cd88de in vlan_transmit (ifp=3D0xfffff8003742e800, m=3D0xfffff8004de1a900) at /usr/src/sys/net/if_vlan.c:1185 #6 0xffffffff80cce39b in ether_output_frame (ifp=3D0xfffff8003742e800,=20 ifp@entry=3D<error reading variable: value is not available>, m=3D<unavailable>,=20 m@entry=3D<error reading variable: value is not available>) at /usr/src/sys/net/if_ethersubr.c:508 #7 0xffffffff8210c6d8 in ng_apply_item (node=3D<unavailable>, node@entry=3D0xfffff800423e8700,=20 item=3D<unavailable>, item@entry=3D0xfffff8038da1ad80, rw=3D0) at /usr/src/sys/netgraph/ng_base.c:2407 #8 0xffffffff8210c45e in ng_snd_item (item=3Ditem@entry=3D0xfffff8038da1ad= 80, flags=3Dflags@entry=3D0) at /usr/src/sys/netgraph/ng_base.c:2324 #9 0xffffffff835247f2 in ng_pppoe_disconnect (hook=3D0xfffff80037b6bf00,=20 hook@entry=3D<error reading variable: value is not available>) at /usr/src/sys/netgraph/ng_pppoe.c:2070 #10 0xffffffff8210ac23 in ng_destroy_hook (hook=3D0xfffff80037b6bf00,=20 hook@entry=3D<error reading variable: value is not available>) at /usr/src/sys/netgraph/ng_base.c:1224 #11 0xffffffff8210c729 in ng_apply_item (node=3D<unavailable>, node@entry=3D0xfffff80054599d00,=20 item=3D<unavailable>, item@entry=3D0xfffff800a06dad80, rw=3D1) at /usr/src/sys/netgraph/ng_base.c:2478 #12 0xffffffff8210c45e in ng_snd_item (item=3D0xfffff800a06dad80, flags=3D0, flags@entry=3D934723328) at /usr/src/sys/netgraph/ng_base.c:2324 #13 0xffffffff8210e471 in ng_send_fn1 (node=3D0x0, hook=3D<optimized out>, hook@entry=3D0xfffff80037b6bf00,=20 fn=3D<optimized out>, arg1=3D<optimized out>, arg1@entry=3D0x0, arg2=3D= -511, arg2@entry=3D0, flags=3D<optimized out>,=20 flags@entry=3D0) at /usr/src/sys/netgraph/ng_base.c:3730 #14 0xffffffff8210aae9 in ng_send_fn (node=3D<unavailable>, hook=3D0xfffff80037b6bf00, fn=3D<unavailable>,=20 arg1=3D0x0, arg2=3D0) at /usr/src/sys/netgraph/ng_base.c:3708 #15 ng_rmhook_self (hook=3D0xfffff80037b6bf00) at /usr/src/sys/netgraph/ng_base.c:1639 #16 ng_destroy_hook (hook=3D0xfffff80034c07380) at /usr/src/sys/netgraph/ng_base.c:1199 #17 0xffffffff8210a8c5 in ng_rmnode (node=3D0xfffff80037e6c500, dummy1=3D<o= ptimized out>, dummy2=3D<optimized out>,=20 dummy3=3D<optimized out>) at /usr/src/sys/netgraph/ng_base.c:745 #18 0xffffffff8210cb03 in ng_generic_msg (here=3D0xfffff80037e6c500, item=3D0xfffff801210fd480,=20 lasthook=3D<optimized out>) at /usr/src/sys/netgraph/ng_base.c:2527 #19 ng_apply_item (node=3D<optimized out>, node@entry=3D0xfffff80037e6c500, item=3D<optimized out>,=20 item@entry=3D0xfffff801210fd480, rw=3D<optimized out>) at /usr/src/sys/netgraph/ng_base.c:2441 #20 0xffffffff8210c45e in ng_snd_item (item=3Ditem@entry=3D0xfffff801210fd4= 80, flags=3Dflags@entry=3D0) at /usr/src/sys/netgraph/ng_base.c:2324 #21 0xffffffff82f35dcf in ngc_send (so=3D<unavailable>,=20 so@entry=3D<error reading variable: value is not available>, flags=3D<unavailable>,=20 flags@entry=3D<error reading variable: value is not available>, m=3D0xfffff803d5b65400,=20 m@entry=3D<error reading variable: value is not available>, addr=3D<unavailable>,=20 addr@entry=3D<error reading variable: value is not available>, control=3D<unavailable>,=20 control@entry=3D<error reading variable: value is not available>, td=3D<unavailable>,=20 td@entry=3D<error reading variable: value is not available>) at /usr/src/sys/netgraph/ng_socket.c:345 #22 0xffffffff80c51c47 in sosend_generic (so=3D0xfffff80042011760,=20 so@entry=3D<error reading variable: value is not available>, addr=3D0xfffff80141708f80,=20 addr@entry=3D<error reading variable: value is not available>, uio=3D<o= ptimized out>,=20 uio@entry=3D<error reading variable: value is not available>, top=3D0xfffff803d5b65400,=20 top@entry=3D<error reading variable: value is not available>, control=3D<optimized out>,=20 control@entry=3D<error reading variable: value is not available>, flags= =3D0,=20 flags@entry=3D<error reading variable: value is not available>, td=3D0xfffffe0110c06c80,=20 td@entry=3D<error reading variable: value is not available>) at /usr/src/sys/kern/uipc_socket.c:1755 #23 0xffffffff80c51f56 in sosend (so=3D<unavailable>, so@entry=3D0xfffff80042011760, addr=3D<unavailable>,=20 uio=3D<unavailable>, uio@entry=3D0xfffffe01112de9a8, top=3D<unavailable= >, top@entry=3D0x0,=20 control=3Dcontrol@entry=3D0x0, flags=3D<unavailable>, flags@entry=3D0, td=3D0xfffffe0110c06c80) at /usr/src/sys/kern/uipc_socket.c:1805 #24 0xffffffff80c58ceb in kern_sendit (td=3D<optimized out>, td@entry=3D0xfffffe0110c06c80, s=3D5,=20 mp=3D<optimized out>, mp@entry=3D0xfffffe01112dea80, flags=3D0, control= =3D0x0, segflg=3Dsegflg@entry=3DUIO_USERSPACE) at /usr/src/sys/kern/uipc_syscalls.c:798 #25 0xffffffff80c5908b in sendit (td=3D0xfffffe0110c06c80, td@entry=3D<unavailable>, s=3D<unavailable>,=20 mp=3Dmp@entry=3D0xfffffe01112dea80, flags=3D<unavailable>) at /usr/src/sys/kern/uipc_syscalls.c:723 #26 0xffffffff80c58e9d in sys_sendto (td=3D<unavailable>,=20 td@entry=3D<error reading variable: value is not available>, uap=3D<unavailable>,=20 uap@entry=3D<error reading variable: value is not available>) at /usr/src/sys/kern/uipc_syscalls.c:841 #27 0xffffffff8101b59e in syscallenter (td=3D<optimized out>) at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:189 #28 amd64_syscall (td=3D0xfffffe0110c06c80, traced=3D0) at /usr/src/sys/amd64/amd64/trap.c:1184 #29 <signal handler called> #30 0x00000008008bf6da in ?? () Backtrace stopped: Cannot access memory at address 0x7fffdfffdab8 (kgdb) f 5 #5 0xffffffff80cd88de in vlan_transmit (ifp=3D0xfffff8003742e800, m=3D0xfffff8004de1a900) at /usr/src/sys/net/if_vlan.c:1185 1185 NET_EPOCH_ASSERT(); (kgdb) p *ifp $1 =3D {if_link =3D {cstqe_next =3D 0xfffff800378a3800}, if_clones =3D {le_= next =3D 0x0, le_prev =3D 0xfffff800378a3808},=20 if_groups =3D {cstqh_first =3D 0xfffff800422da7f0, cstqh_last =3D 0xfffff800422da7c8}, if_alloctype =3D 6 '\006',=20 if_numa_domain =3D 255 '\377', if_softc =3D 0xfffff800423d1e00, if_llsoft= c =3D 0x0,=20 if_l2com =3D 0xfffff800423e8700, if_dname =3D 0xffffffff8158fd60 <vlannam= e> "vlan", if_dunit =3D 0, if_index =3D 5,=20 if_index_reserved =3D 0, if_xname =3D "vlan0\000\000\000\000\000\000\000\000\000\000", if_description =3D 0x0,=20 if_flags =3D 34947, if_drv_flags =3D 64, if_capabilities =3D 524546, if_c= apenable =3D 524546, if_linkmib =3D 0x0,=20 if_linkmiblen =3D 0, if_refcount =3D 2, if_type =3D 135 '\207', if_addrle= n =3D 6 '\006', if_hdrlen =3D 4 '\004',=20 if_link_state =3D 2 '\002', if_mtu =3D 1508, if_metric =3D 0, if_baudrate= =3D 100000000, if_hwassist =3D 4119,=20 if_epoch =3D 18, if_lastchange =3D {tv_sec =3D 1625163373, tv_usec =3D 40= 5364}, if_snd =3D {ifq_head =3D 0x0,=20 ifq_tail =3D 0x0, ifq_len =3D 0, ifq_maxlen =3D 50, ifq_mtx =3D {lock_o= bject =3D { lo_name =3D 0xfffff8003742e858 "vlan0", lo_flags =3D 16973824, lo_d= ata =3D 0, lo_witness =3D 0x0},=20 mtx_lock =3D 0}, ifq_drv_head =3D 0x0, ifq_drv_tail =3D 0x0, ifq_drv_= len =3D 0, ifq_drv_maxlen =3D 0,=20 altq_type =3D 0, altq_flags =3D 0, altq_disc =3D 0x0, altq_ifp =3D 0xfffff8003742e800, altq_enqueue =3D 0x0,=20 altq_dequeue =3D 0x0, altq_request =3D 0x0, altq_clfier =3D 0x0, altq_c= lassify =3D 0x0, altq_tbr =3D 0x0,=20 altq_cdnr =3D 0x0}, if_linktask =3D {ta_link =3D {stqe_next =3D 0x0}, t= a_pending =3D 0, ta_priority =3D 0 '\000',=20 ta_flags =3D 0 '\000', ta_func =3D 0xffffffff80cc4270 <do_link_state_ch= ange>,=20 ta_context =3D 0xfffff8003742e800}, if_addmultitask =3D {ta_link =3D {s= tqe_next =3D 0x0}, ta_pending =3D 0,=20 ta_priority =3D 0 '\000', ta_flags =3D 0 '\000', ta_func =3D 0xffffffff= 80cc4580 <if_siocaddmulti>,=20 ta_context =3D 0xfffff8003742e800}, if_addr_lock =3D {lock_object =3D { lo_name =3D 0xffffffff81102568 "if_addr_lock", lo_flags =3D 16973824,= lo_data =3D 0, lo_witness =3D 0x0},=20 mtx_lock =3D 0}, if_addrhead =3D {cstqh_first =3D 0xfffff800423e8d00, c= stqh_last =3D 0xfffff800423e8d28},=20 if_multiaddrs =3D {cstqh_first =3D 0x0, cstqh_last =3D 0xfffff8003742e9d8= }, if_amcount =3D 0,=20 if_addr =3D 0xfffff800423e8d00, if_hw_addr =3D 0xfffff800422da7d0,=20 if_broadcastaddr =3D 0xffffffff8158ee70 <etherbroadcastaddr> "\377\377\377\377\377\377", if_afdata_lock =3D { lock_object =3D {lo_name =3D 0xffffffff81199fe8 "if_afdata", lo_flags = =3D 16973824, lo_data =3D 0,=20 lo_witness =3D 0x0}, mtx_lock =3D 0}, if_afdata =3D {0x0, 0x0, 0xfffff800422d03e0, 0x0 <repeats 25 times>,=20 0xfffff80037d20dc0, 0x0 <repeats 14 times>}, if_afdata_initialized =3D = 2, if_fib =3D 0,=20 if_vnet =3D 0xfffff8000419d600, if_home_vnet =3D 0xfffff8000419d600, if_v= lantrunk =3D 0x0,=20 if_bpf =3D 0xfffff800423d1c80, if_pcount =3D 0, if_bridge =3D 0x0, if_lag= g =3D 0x0, if_pf_kif =3D 0x0, if_carp =3D 0x0,=20 if_label =3D 0x0, if_netmap =3D 0x0, if_output =3D 0xffffffff80cd9a00 <vlan_output>,=20 if_input =3D 0xffffffff80cce980 <ether_input>, if_bridge_input =3D 0x0, if_bridge_output =3D 0x0,=20 if_bridge_linkstate =3D 0x0, if_start =3D 0x0, if_ioctl =3D 0xffffffff80c= d8930 <vlan_ioctl>,=20 if_init =3D 0xffffffff80cd86f0 <vlan_init>, if_resolvemulti =3D 0xffffffff80cceb20 <ether_resolvemulti>,=20 if_qflush =3D 0xffffffff80cd8920 <vlan_qflush>, if_transmit =3D 0xffffffff80cd8700 <vlan_transmit>,=20 if_reassign =3D 0xffffffff80cced00 <ether_reassign>,=20 if_get_counter =3D 0xffffffff80cc46a0 <if_get_counter_default>,=20 if_requestencap =3D 0xffffffff80ccec30 <ether_requestencap>, if_counters = =3D {0xfffffe018dcf6228,=20 0xfffffe018dcf6220, 0xfffffe018dcf6218, 0xfffffe018dcf6210, 0xfffffe018dcf6208, 0xfffffe018dcf6200,=20 0xfffffe018dcf61f8, 0xfffffe018dcf61f0, 0xfffffe018dcf61e8, 0xfffffe018dcf61e0, 0xfffffe018dcf61d8,=20 0xfffffe018dcf61d0}, if_hw_tsomax =3D 65518, if_hw_tsomaxsegcount =3D 3= 5, if_hw_tsomaxsegsize =3D 2048,=20 if_snd_tag_alloc =3D 0xffffffff80cd8ff0 <vlan_snd_tag_alloc>,=20 if_snd_tag_modify =3D 0xffffffff80cd90f0 <vlan_snd_tag_modify>,=20 if_snd_tag_query =3D 0xffffffff80cd9110 <vlan_snd_tag_query>,=20 if_snd_tag_free =3D 0xffffffff80cd9130 <vlan_snd_tag_free>,=20 if_next_snd_tag =3D 0xffffffff80cd9180 <vlan_next_snd_tag>,=20 if_ratelimit_query =3D 0xffffffff80cd9190 <vlan_ratelimit_query>, if_ratelimit_setup =3D 0x0,=20 if_pcp =3D 0 '\000', if_debugnet_methods =3D 0x0, if_epoch_ctx =3D {data = =3D {0x0, 0x0}}, if_ispare =3D {0, 0, 0, 0}} (kgdb)=20 This host runs FreeBSD stable/13-n246143-6aee7855180-dirty from a week and a half ago, GENERIC but with INVARIANTS enabled. Interface alc0 has a VLAN interface vlan0 over which mpd5 runs PPPoE to my ISP, which had an outage, = thus a LCP echo request timeout occurred; the panic occurred as mpd was in the process of tearing down its ng0 interface. Its last log message was: Jul 9 01:22:01 server mpd[997]: [P] LCP: LayerDown --=20 You are receiving this mail because: You are the assignee for the bug.=
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