panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8063f57400+24 0x5640193117423d0e!=0x564019b174bae90e
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*155743 89269 0 0 0x4000000 1 syz-executor.1
196081 9695 0 0x14000 0x40000200 0 softclock
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline]
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327
udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017
sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf0c3acd910, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8063f57400+24 0x5640193117423d0e!=0x564019b174bae90e
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline]
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327
udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017
sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf0c3acd910, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000230dcc30
rbx 0xffff8000230dcce0
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffff8000230dcbf0
r9 0xffffffff814bc41f kprintf+0x16f
r10 0x1
r11 0xd5b65becbd750c7
r12 0x3000000008
r13 0xffff8000230dcc40
r14 0x100
r15 0x1
rip 0xffffffff81c991c8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000230dcc20
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=155743 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800023f9bb60,0xffff800023f9a048
process=0xffff800020e34bd0 user=0xffff8000230d8000, vmspace=0xfffffd806e9142e8
estcpu=36, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
47125 431607 4699 0 2 0 syz-executor.0
89269 271560 815 0 2 0 syz-executor.1
*89269 155743 815 0 7 0x4000000 syz-executor.1
8759 449335 0 0 3 0x14200 acct acct
40189 349312 0 0 3 0x14280 nfsidl nfsio
6240 322576 0 0 3 0x14280 nfsidl nfsio
79926 465737 0 0 3 0x14280 nfsidl nfsio
65321 267372 0 0 3 0x14280 nfsidl nfsio
26424 388251 0 0 3 0x14280 nfsidl nfsio
84387 252026 0 0 3 0x14280 nfsidl nfsio
62177 416909 0 0 3 0x14280 nfsidl nfsio
11128 417533 0 0 3 0x14280 nfsidl nfsio
32224 88775 0 0 3 0x14280 nfsidl nfsio
84254 274423 0 0 3 0x14280 nfsidl nfsio
79522 138142 0 0 3 0x14280 nfsidl nfsio
41593 424754 0 0 3 0x14280 nfsidl nfsio
85335 106765 0 0 3 0x14280 nfsidl nfsio
2056 173404 0 0 3 0x14280 nfsidl nfsio
31446 112641 0 0 3 0x14280 nfsidl nfsio
7341 500027 0 0 3 0x14280 nfsidl nfsio
82031 312469 0 0 3 0x14280 nfsidl nfsio
13642 451644 0 0 3 0x14280 nfsidl nfsio
30791 230184 0 0 3 0x14280 nfsidl nfsio
6657 46648 0 0 3 0x14280 nfsidl nfsio
15060 522201 0 0 3 0x14200 bored sosplice
815 278197 3478 0 2 0x482 syz-executor.1
4699 201710 3478 0 3 0x82 nanosleep syz-executor.0
3478 252672 10073 0 3 0x82 thrsleep syz-fuzzer
3478 325721 10073 0 3 0x4000082 nanosleep syz-fuzzer
3478 148689 10073 0 3 0x4000082 thrsleep syz-fuzzer
3478 42040 10073 0 3 0x4000082 thrsleep syz-fuzzer
3478 62948 10073 0 3 0x4000082 thrsleep syz-fuzzer
3478 331230 10073 0 3 0x4000082 kqread syz-fuzzer
3478 126908 10073 0 3 0x4000082 thrsleep syz-fuzzer
3478 432482 10073 0 3 0x4000082 thrsleep syz-fuzzer
10073 7248 6049 0 3 0x10008a pause ksh
6049 244157 72857 0 3 0x92 select sshd
98373 163001 1 0 3 0x100083 ttyin getty
72857 216227 1 0 3 0x80 select sshd
47223 342289 47412 74 3 0x100092 bpf pflogd
47412 326770 1 0 3 0x80 netio pflogd
12410 82839 94176 73 3 0x100090 kqread syslogd
94176 272554 1 0 3 0x100082 netio syslogd
4606 490654 1 77 3 0x100090 poll dhclient
25845 239158 1 0 3 0x80 poll dhclient
8371 373283 0 0 3 0x14200 bored smr
66936 482113 0 0 2 0x14200 zerothread
76918 452914 0 0 3 0x14200 aiodoned aiodoned
10711 118696 0 0 3 0x14200 syncer update
60976 450617 0 0 3 0x14200 cleaner cleaner
65109 175700 0 0 3 0x14200 reaper reaper
16533 297534 0 0 3 0x14200 pgdaemon pagedaemon
48664 178456 0 0 3 0x14200 bored crynlk
90616 127218 0 0 3 0x14200 bored crypto
57987 20002 0 0 3 0x40014200 acpi0 acpi0
53209 329756 0 0 3 0x40014200 idle1
70793 84220 0 0 3 0x14200 bored softnet
63441 165075 0 0 3 0x14200 bored systqmp
21025 298359 0 0 3 0x14200 bored systq
9695 196081 0 0 7 0x40014200 softclock
7482 38905 0 0 3 0x40014200 idle0
1 430832 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 89269 (syz-executor.1) thread 0xffff800023f9af08 (155743)
exclusive rwlock netlock r = 0 (0xffffffff827a6120)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:543
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9518 6424K 7582K 78643K 15157 0
pcb 13 8K 8K 78643K 147 0
rtable 113 16K 19K 78643K 688 0
ifaddr 88 18K 18K 78643K 222 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 67 0
ioctlops 0 0K 4K 78643K 2170 0
iov 0 0K 16K 78643K 95 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 2317 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 21 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 218 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 1295 0
sigio 0 0K 0K 78643K 20 0
proc 63 63K 95K 78643K 472 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 420 0
in_multi 64 3K 3K 78643K 228 0
ether_multi 1 0K 0K 78643K 24 0
mrt 0 0K 0K 78643K 8 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 261 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 186 77K 92K 78643K 4976 0
UVM aobj 55 4K 5K 78643K 67 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 131 0
NDP 12 0K 0K 78643K 41 0
temp 135 3880K 3944K 78643K 13258 0
kqueue 3 4K 16K 78643K 47 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 13 0 6 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 88 43 0 41 1 0 1 1 0 8 0
rtentry 112 114 0 78 2 0 2 2 0 8 0
unpcb 120 916 0 906 1 0 1 1 0 8 0
syncache 272 12 0 12 4 4 0 1 0 8 0
tcpqe 32 252 0 252 2 2 0 1 0 8 0
tcpcb 592 294 0 286 7 5 2 2 0 8 0
inpcb 296 2095 0 2087 5 3 2 2 0 8 1
rttmr 72 3 0 3 3 3 0 1 0 8 0
ip6q 72 2 0 2 1 1 0 1 0 8 0
ip6af 40 6 0 6 1 1 0 1 0 8 0
nd6 48 32 0 25 1 0 1 1 0 8 0
pkpcb 40 13 0 13 3 3 0 1 0 8 0
ppxss 1136 2 0 2 2 2 0 1 0 8 0
pffrag 232 14 0 13 3 2 1 1 0 482 0
pffrnode 88 14 0 13 3 2 1 1 0 8 0
pffrent 40 374 0 373 3 2 1 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 96 0 87 6 5 1 2 0 8 0
pftag 88 2 0 2 1 1 0 1 0 8 0
pfstitem 24 100 0 83 1 0 1 1 0 8 0
pfstkey 112 100 0 83 2 0 2 2 0 8 0
pfstate 328 100 0 83 5 0 5 5 0 8 0
pfrule 1360 50 0 35 6 4 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 346 0 106 16 1 15 15 0 8 0
art_table 32 347 0 106 2 0 2 2 0 8 0
art_node 16 112 0 80 1 0 1 1 0 8 0
sysvmsgpl 40 21 0 9 1 0 1 1 0 8 0
semapl 112 216 0 206 1 0 1 1 0 8 0
shmpl 112 64 0 13 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2931 0 1532 89 1 88 89 0 8 0
ffsino 272 2931 0 1532 94 0 94 94 0 8 0
nchpl 144 4904 0 3303 60 0 60 60 0 8 0
uvmvnodes 72 3989 0 0 73 0 73 73 0 8 0
vnodes 208 3989 0 0 210 0 210 210 0 8 0
namei 1024 13406 0 13406 4 3 1 1 0 8 1
percpumem 16 44 0 12 1 0 1 1 0 8 0
vcpupl 1984 5 0 0 1 0 1 1 0 8 0
vmpool 560 15 0 10 1 0 1 1 0 8 0
pfiaddrpl 120 40 0 32 2 1 1 1 0 8 0
scsiplug 72 1 0 1 1 1 0 1 0 8 0
scxspl 200 14431 0 14431 14 13 1 7 0 8 1
plimitpl 152 58 0 50 1 0 1 1 0 8 0
sigapl 424 1534 0 1480 9 2 7 7 0 8 1
futexpl 56 17963 0 17963 4 3 1 1 0 8 1
knotepl 112 110 0 90 1 0 1 1 0 8 0
kqueuepl 152 145 0 141 1 0 1 1 0 8 0
pipepl 304 236 0 225 4 2 2 2 0 8 1
fdescpl 496 1495 0 1478 3 0 3 3 0 8 0
filepl 152 8605 0 8502 5 0 5 5 0 8 0
lockfpl 104 233 0 232 1 0 1 1 0 8 0
lockfspl 48 78 0 77 1 0 1 1 0 8 0
sessionpl 120 18 0 7 1 0 1 1 0 8 0
pgrppl 48 34 0 23 1 0 1 1 0 8 0
ucredpl 96 513 0 504 1 0 1 1 0 8 0
zombiepl 144 1480 0 1480 1 0 1 1 0 8 1
processpl 1008 1534 0 1480 7 0 7 7 0 8 0
procpl 632 4115 0 4053 8 2 6 6 0 8 0
srpgc 72 2 0 2 1 1 0 1 0 8 0
sosppl 144 11 0 11 4 4 0 1 0 8 0
sockpl 400 3068 0 3048 10 7 3 4 0 8 1
mcl64k 65536 10 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 14 0 0 2 0 2 2 0 8 0
mcl9k 9216 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 12 0 0 2 0 2 2 0 8 0
mcl4k 4096 16 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 195 0 0 24 1 23 24 0 8 0
mtagpl 96 301 0 0 8 0 8 8 0 8 0
mbufpl 256 754 0 0 47 0 47 47 0 8 0
bufpl 280 5213 0 128 364 0 364 364 0 8 0
anonpl 16 156638 0 138101 130 39 91 92 0 124 14
amapchunkpl 152 8438 0 8145 33 20 13 25 0 158 0
amappl16 192 6294 0 5420 92 40 52 56 0 8 8
amappl15 184 2 0 1 1 0 1 1 0 8 0
amappl14 176 608 0 604 1 0 1 1 0 8 0
amappl13 168 688 0 682 1 0 1 1 0 8 0
amappl12 160 675 0 669 1 0 1 1 0 8 0
amappl11 152 664 0 647 1 0 1 1 0 8 0
amappl10 144 20 0 17 1 0 1 1 0 8 0
amappl9 136 365 0 364 1 0 1 1 0 8 0
amappl8 128 386 0 333 2 0 2 2 0 8 0
amappl7 120 114 0 102 1 0 1 1 0 8 0
amappl6 112 33 0 26 1 0 1 1 0 8 0
amappl5 104 794 0 775 1 0 1 1 0 8 0
amappl4 96 1104 0 1072 1 0 1 1 0 8 0
amappl3 88 768 0 757 1 0 1 1 0 8 0
amappl2 80 11697 0 11624 2 0 2 2 0 8 0
amappl1 72 52551 0 52104 23 13 10 18 0 8 0
amappl 80 4402 0 4324 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 66 0 12 1 0 1 1 0 8 0
uaddrrnd 24 1510 0 1488 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1510 0 1488 1 0 1 1 0 8 0
vmmpekpl 168 14093 0 14053 2 0 2 2 0 8 0
vmmpepl 168 198329 0 196150 152 48 104 116 0 357 8
vmsppl 368 1509 0 1488 3 1 2 3 0 8 0
pdppl 4096 3027 0 2981 8 2 6 7 0 8 0
pvpl 32 473965 0 452060 278 64 214 216 0 265 35
pmappl 232 1509 0 1488 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 318 0 26 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff827b4ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff828dd1c8,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435
sleep_finish(ffff800020d96ef8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
softclock_thread(ffff800020d89148) at softclock_thread+0x103 sys/kern/kern_timeout.c:601
end trace frame: 0x0, count: 7
ddb{0}> trace
x86_ipi_db(ffffffff827b4ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828dd1c8) at __mp_lock+0x12e sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff828dd1c8,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435
sleep_finish(ffff800020d96ef8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
softclock_thread(ffff800020d89148) at softclock_thread+0x103 sys/kern/kern_timeout.c:601
end trace frame: 0x0, count: -8
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline]
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327
udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017
sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf0c3acd910, count: 3
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_dup_pkt(fffffd8063f53000,40,2) at m_dup_pkt+0xa6 sys/kern/uipc_mbuf.c:1436
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d ip_mloopback sys/netinet/ip_output.c:1705 [inline]
ip_output(fffffd8063f53000,fffffd806d619d00,fffffd806f662198,0,0,fffffd806f662128) at ip_output+0xa9d sys/netinet/ip_output.c:327
udp_output(fffffd806f662128,fffffd8063f53000,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017
sosend(fffffd806f6634b0,0,ffff8000230dd1f8,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800023f9af08,3,ffff8000230dd1f8,0,ffff8000230dd2e0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800023f9af08,ffff8000230dd298,ffff8000230dd2e0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff8000230dd360) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000230dd360) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf0c3acd910, count: -12