Page fault in udp_usrreq.c:823

20180620 10:32:47 all (1/1): udp.sh
Kernel page fault with the following non-sleepable locks held:
shared rw udpinp (udpinp) r = 0 (0xfffff80bbc808d78) locked _at_ netinet/in_pcb.c:2398
stack backtrace:
#0 0xffffffff80c00733 at witness_debugger+0x73
#1 0xffffffff80c01b11 at witness_warn+0x461
#2 0xffffffff81075763 at trap_pfault+0x53
#3 0xffffffff81074d7a at trap+0x2ba
#4 0xffffffff8105076c at calltrap+0x8
#5 0xffffffff80dd21b0 at udp_ctlinput+0x50
#6 0xffffffff80d3081d at icmp_input+0x96d
#7 0xffffffff80d316d7 at ip_input+0x3f7
#8 0xffffffff80cc0a92 at netisr_dispatch_src+0xa2
#9 0xffffffff80ca3ebe at ether_demux+0x16e
#10 0xffffffff80ca5377 at ether_nh_input+0x427
#11 0xffffffff80cc0a92 at netisr_dispatch_src+0xa2
#12 0xffffffff80ca437f at ether_input+0x8f
#13 0xffffffff80cbc500 at iflib_rxeof+0xc90
#14 0xffffffff80cb6b6f at _task_fn_rx+0x7f
#15 0xffffffff80bdd209 at gtaskqueue_run_locked+0x139
#16 0xffffffff80bdcf88 at gtaskqueue_thread_loop+0x88
#17 0xffffffff80b54514 at fork_exit+0x84


Fatal trap 12: page fault while in kernel mode
cpuid = 10; apic id = 0a
fault virtual address = 0x8
fault code  = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80dd2423
stack pointer         = 0x0:0xfffffe00004a5500
frame pointer         = 0x0:0xfffffe00004a55a0
code segment  = base 0x0, limit 0xfffff, type 0x1b
   = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process  = 0 (if_io_tqg_10)
[ thread pid 0 tid 100069 ]
Stopped at      udp_common_ctlinput+0x263:      cmpq    $0,0x8(%rax)
db>

Details _at_ https://people.freebsd.org/~pho/stress/log/udp_usrreq.txt

-- 
Peter