ng_snd_item: I thought(?) we fixed this :( r354843

I thought someone, somewhere fixed this,  but it's hit again.

core *IS* available, and I can give access as well.



Unread portion of the kernel message buffer:
panic: ng_snd_item: 42 != 1414
cpuid = 0
time = 1574707403
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 
0xfffffe0215a304d0
vpanic() at vpanic+0x17e/frame 0xfffffe0215a30530
panic() at panic+0x43/frame 0xfffffe0215a30590
ng_snd_item() at ng_snd_item+0x482/frame 0xfffffe0215a305d0
ng_ether_output() at ng_ether_output+0x5e/frame 0xfffffe0215a30600
ether_output() at ether_output+0x661/frame 0xfffffe0215a306a0
arpintr() at arpintr+0xf0c/frame 0xfffffe0215a30840
netisr_dispatch_src() at netisr_dispatch_src+0x94/frame 
0xfffffe0215a308c0
ether_demux() at ether_demux+0x15e/frame 0xfffffe0215a308f0
ng_ether_rcv_upper() at ng_ether_rcv_upper+0xb2/frame 0xfffffe0215a30940
ng_apply_item() at ng_apply_item+0xa4/frame 0xfffffe0215a309c0
ng_snd_item() at ng_snd_item+0x2b0/frame 0xfffffe0215a30a00
ng_apply_item() at ng_apply_item+0xa4/frame 0xfffffe0215a30a80
ng_snd_item() at ng_snd_item+0x2b0/frame 0xfffffe0215a30ac0
ng_ether_input() at ng_ether_input+0x4c/frame 0xfffffe0215a30af0
ether_nh_input() at ether_nh_input+0x2c9/frame 0xfffffe0215a30b40
netisr_dispatch_src() at netisr_dispatch_src+0x94/frame 
0xfffffe0215a30bc0
ether_input() at ether_input+0x58/frame 0xfffffe0215a30c10
bce_intr() at bce_intr+0x6b7/frame 0xfffffe0215a30c90
ithread_loop() at ithread_loop+0x1c6/frame 0xfffffe0215a30cf0
fork_exit() at fork_exit+0x80/frame 0xfffffe0215a30d30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0215a30d30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
Uptime: 6d7h53m25s
Dumping 27613 out of 131029 
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" : "=r" (td) : "n" 
(offsetof(struct pcpu,
(kgdb) #0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=1) at /usr/src/sys/kern/kern_shutdown.c:392
#2  0xffffffff804bbc20 in kern_reboot (howto=260)
     at /usr/src/sys/kern/kern_shutdown.c:479
#3  0xffffffff804bc076 in vpanic (fmt=<optimized out>, ap=<optimized 
out>)
     at /usr/src/sys/kern/kern_shutdown.c:908
#4  0xffffffff804bbdd3 in panic (fmt=<unavailable>)
     at /usr/src/sys/kern/kern_shutdown.c:835
#5  0xffffffff8262f442 in ng_snd_item (item=0xfffff813c2e41280, flags=0)
     at /usr/src/sys/netgraph/ng_base.c:2252
#6  0xffffffff82643c0e in ng_ether_output (ifp=<optimized out>,
     mp=0xfffffe0215a30658) at /usr/src/sys/netgraph/ng_ether.c:294
#7  0xffffffff805c44e1 in ether_output (ifp=<optimized out>,
     m=0xfffff80be7cfe500, dst=0xfffffe0215a30800, ro=<optimized out>)
     at /usr/src/sys/net/if_ethersubr.c:430
#8  0xffffffff805ded6c in in_arpinput (m=<optimized out>)
     at /usr/src/sys/netinet/if_ether.c:1144
#9  arpintr (m=0xfffff80be7cfe500) at 
/usr/src/sys/netinet/if_ether.c:747
#10 0xffffffff805cff94 in netisr_dispatch_src (proto=4, source=0,
     m=0xfffff80be7cfe500) at /usr/src/sys/net/netisr.c:1127
#11 0xffffffff805c47ce in ether_demux (ifp=0xfffff8107db75800,
     m=<unavailable>) at /usr/src/sys/net/if_ethersubr.c:916
#12 0xffffffff82644042 in ng_ether_rcv_upper (hook=<optimized out>,
     item=<optimized out>) at /usr/src/sys/netgraph/ng_ether.c:744
#13 0xffffffff8262f514 in ng_apply_item (node=0xfffff8106c02c200,
     item=0xfffff813c2e41280, rw=0) at 
/usr/src/sys/netgraph/ng_base.c:2403
#14 0xffffffff8262f270 in ng_snd_item (item=0xfffff813c2e41280, flags=0)
     at /usr/src/sys/netgraph/ng_base.c:2320
#15 0xffffffff8262f514 in ng_apply_item (node=0xfffff8012c69de00,
     item=0xfffff813c2e41280, rw=0) at 
/usr/src/sys/netgraph/ng_base.c:2403
#16 0xffffffff8262f270 in ng_snd_item (item=0xfffff813c2e41280, flags=0)
     at /usr/src/sys/netgraph/ng_base.c:2320
#17 0xffffffff82643c9c in ng_ether_input (ifp=<optimized out>,
     mp=0xfffffe0215a30b18) at /usr/src/sys/netgraph/ng_ether.c:255
#18 0xffffffff805c5a59 in ether_input_internal (ifp=0xfffff8107db75800,
     m=0xfffff80be7cfe500) at /usr/src/sys/net/if_ethersubr.c:654
#19 ether_nh_input (m=<optimized out>) at 
/usr/src/sys/net/if_ethersubr.c:735
#20 0xffffffff805cff94 in netisr_dispatch_src (proto=5, source=0,
     m=0xfffff80be7cfe500) at /usr/src/sys/net/netisr.c:1127
#21 0xffffffff805c4c48 in ether_input (ifp=0xfffff8107db75800, m=0x0)
     at /usr/src/sys/net/if_ethersubr.c:824
#22 0xffffffff82455767 in bce_rx_intr (sc=0xfffffe0234fc8000)
     at /usr/src/sys/dev/bce/if_bce.c:6848
#23 bce_intr (xsc=0xfffffe0234fc8000) at 
/usr/src/sys/dev/bce/if_bce.c:8017
#24 0xffffffff80485166 in intr_event_execute_handlers (p=<optimized 
out>,
     ie=<optimized out>) at /usr/src/sys/kern/kern_intr.c:1148
#25 ithread_execute_handlers (p=<optimized out>, ie=<optimized out>)
     at /usr/src/sys/kern/kern_intr.c:1161
#26 ithread_loop (arg=<optimized out>) at 
/usr/src/sys/kern/kern_intr.c:1241
#27 0xffffffff80481ca0 in fork_exit (
     callout=0xffffffff80484fa0 <ithread_loop>, arg=0xfffff8107d1ffcc0,
     frame=0xfffffe0215a30d40) at /usr/src/sys/kern/kern_fork.c:1059
#28 <signal handler called>
(kgdb)

-- 
Larry Rosenman                     http://people.freebsd.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler_at_FreeBSD.org
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106