panic(ffffffff821f90bc) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82676828,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd806a4a8a00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd806a4a8a00,0,fffffd806f6e3818,0,0,fffffd806f6e37a8) at ip_output+0xfd7 sys/netinet/ip_output.c:499
udp_output(fffffd806f6e37a8,fffffd806a4a8a00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
sosend(fffffd80681d54c8,0,ffff800023189ae0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020e92eb8,6,ffff800023189bc0,0,ffff800023189ca0) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020e92eb8,ffff800023189c58,ffff800023189ca0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023189d20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023189d20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ae567ac690, count: 2
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 0xfffffd806a24ec00+16 0x0!=0xe5a85c550011b427
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821f90bc) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82676828,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd806a4a8a00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd806a4a8a00,0,fffffd806f6e3818,0,0,fffffd806f6e37a8) at ip_output+0xfd7 sys/netinet/ip_output.c:499
udp_output(fffffd806f6e37a8,fffffd806a4a8a00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
sosend(fffffd80681d54c8,0,ffff800023189ae0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020e92eb8,6,ffff800023189bc0,0,ffff800023189ca0) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020e92eb8,ffff800023189c58,ffff800023189ca0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023189d20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023189d20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ae567ac690, count: -13
ddb{1}> show registers
rdi 0xffffffff81e5f3e7 db_enter+0x17
rsi 0xa719 __ALIGN_SIZE+0x9719
rbp 0xffff8000231894f0
rbx 0xffff8000231895a0
rdx 0xa71a __ALIGN_SIZE+0x971a
rcx 0xffff800020f6c000
rax 0xffff800020f6c000
r8 0xffffffff8198b1df kprintf+0x16f
r9 0x1
r10 0x25
r11 0xe7f0135ca12237c8
r12 0x3000000008
r13 0xffff800023189500
r14 0x100
r15 0x1
rip 0xffffffff81e5f3e8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000231894e0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=273973 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800020e92288,0xffffffff8268f918
process=0xffff800020e807c0 user=0xffff800023184000, vmspace=0xfffffd807f000170
estcpu=10, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
48986 512468 17008 0 2 0 syz-executor.0
*48986 273973 17008 0 7 0x4000000 syz-executor.0
97792 359383 23824 0 3 0x80 nanosleep syz-executor.1
97792 345139 23824 0 3 0x4000080 poll syz-executor.1
97792 522495 23824 0 3 0x4000080 fsleep syz-executor.1
97792 319096 23824 0 3 0x4000080 fsleep syz-executor.1
23824 330567 55875 0 3 0x82 nanosleep syz-executor.1
17008 226856 55875 0 3 0x82 nanosleep syz-executor.0
55875 27583 64176 0 7 0x482 syz-fuzzer
55875 28245 64176 0 2 0x4000482 syz-fuzzer
55875 288076 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 200045 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 201482 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 107080 64176 0 3 0x4000082 kqread syz-fuzzer
55875 45294 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 6968 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 1181 64176 0 3 0x4000082 thrsleep syz-fuzzer
55875 33230 64176 0 3 0x4000082 thrsleep syz-fuzzer
64176 168548 66499 0 3 0x10008a pause ksh
66499 283478 47443 0 3 0x92 select sshd
23459 138100 1 0 3 0x100083 ttyin getty
47443 325284 1 0 3 0x80 select sshd
41807 480013 83744 74 3 0x100092 bpf pflogd
83744 245994 1 0 3 0x80 netio pflogd
61520 351956 28741 73 3 0x100090 kqread syslogd
28741 91241 1 0 3 0x100082 netio syslogd
73616 29033 1 77 3 0x100090 poll dhclient
1153 497934 1 0 3 0x80 poll dhclient
72852 188735 0 0 3 0x14200 bored smr
3896 438912 0 0 2 0x14200 zerothread
33390 62552 0 0 3 0x14200 aiodoned aiodoned
20782 160774 0 0 3 0x14200 syncer update
28536 376878 0 0 3 0x14200 cleaner cleaner
14261 301482 0 0 3 0x14200 reaper reaper
40872 272383 0 0 3 0x14200 pgdaemon pagedaemon
30633 515201 0 0 3 0x14200 bored crynlk
91191 291031 0 0 3 0x14200 bored crypto
26352 154638 0 0 3 0x40014200 acpi0 acpi0
78271 157376 0 0 3 0x40014200 idle1
49437 427052 0 0 3 0x14200 bored softnet
64616 512550 0 0 3 0x14200 bored systqmp
41438 473970 0 0 3 0x14200 bored systq
32854 268877 0 0 3 0x40014200 bored softclock
65946 189007 0 0 3 0x40014200 idle0
1 24232 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 48986 (syz-executor.0) thread 0xffff800020e92eb8 (273973)
exclusive rwlock netlock r = 0 (0xffffffff824fb708)
#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:537
#3 sendit+0x52b sys/kern/uipc_syscalls.c:657
#4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
#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 9496 6533K 6592K 78643K 10612 0
pcb 13 8K 8K 78643K 19 0
rtable 102 3K 3K 78643K 224 0
ifaddr 52 11K 11K 78643K 58 0
counters 43 33K 33K 78643K 43 0
ioctlops 0 0K 4K 78643K 1469 0
iov 0 0K 12K 78643K 6 0
mount 1 1K 1K 78643K 1 0
vnodes 1221 77K 77K 78643K 1237 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 4 0K 0K 78643K 4 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 6 17K 25K 78643K 53 0
proc 59 63K 95K 78643K 440 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 29 1K 2K 78643K 39 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 207 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 127 23K 23K 78643K 1086 0
UVM aobj 4 2K 2K 78643K 4 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 8 0K 0K 78643K 13 0
temp 75 3036K 3100K 78643K 2060 0
kqueue 4 5K 12K 78643K 16 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 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 23 0 21 1 0 1 1 0 8 0
rtentry 112 49 0 8 2 0 2 2 0 8 0
unpcb 120 49 0 38 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 773 0 773 1 0 1 1 0 8 1
tcpcb 544 14 0 10 1 0 1 1 0 8 0
inpcb 280 50 0 42 1 0 1 1 0 8 0
nd6 48 7 0 3 1 0 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
pfstitem 24 13 0 0 1 0 1 1 0 8 0
pfstkey 112 13 0 0 1 0 1 1 0 8 0
pfstate 328 13 0 0 2 0 2 2 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 212 0 40 13 0 13 13 0 8 0
art_table 32 213 0 40 2 0 2 2 0 8 0
art_node 16 48 0 10 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 2 0 0 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1464 0 57 89 0 89 89 0 8 0
ffsino 272 1464 0 57 95 1 94 94 0 8 0
nchpl 144 1715 0 106 60 0 60 60 0 8 0
uvmvnodes 72 1517 0 0 28 0 28 28 0 8 0
vnodes 208 1517 0 0 80 0 80 80 0 8 0
namei 1024 4477 0 4477 2 1 1 1 0 8 1
percpumem 16 32 0 0 1 0 1 1 0 8 0
scxspl 192 4518 0 4518 8 1 7 7 0 8 7
plimitpl 152 15 0 7 1 0 1 1 0 8 0
sigapl 424 268 0 236 4 0 4 4 0 8 0
futexpl 56 467 0 465 1 0 1 1 0 8 0
knotepl 112 74 0 55 1 0 1 1 0 8 0
kqueuepl 144 23 0 19 1 0 1 1 0 8 0
pipelkpl 48 84 0 73 1 0 1 1 0 8 0
pipepl 120 168 0 148 1 0 1 1 0 8 0
fdescpl 496 253 0 236 3 0 3 3 0 8 0
filepl 152 1315 0 1208 6 1 5 5 0 8 0
lockfpl 104 14 0 13 1 0 1 1 0 8 0
lockfspl 48 6 0 5 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 59 0 50 1 0 1 1 0 8 0
zombiepl 144 236 0 236 2 1 1 1 0 8 1
processpl 984 268 0 236 6 1 5 5 0 8 1
procpl 624 315 0 270 4 0 4 4 0 8 0
sockpl 400 122 0 101 4 1 3 3 0 8 0
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 204 0 0 25 0 25 25 0 8 0
mtagpl 80 2 0 0 1 0 1 1 0 8 0
mbufpl 256 242 0 0 15 0 15 15 0 8 0
bufpl 280 3320 0 132 228 0 228 228 0 8 0
anonpl 16 42178 0 23908 75 1 74 74 0 124 0
amapchunkpl 152 1081 0 921 7 0 7 7 0 158 0
amappl16 192 1178 0 183 50 0 50 50 0 8 0
amappl15 184 12 0 9 1 0 1 1 0 8 0
amappl14 176 28 0 23 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 36 0 28 1 0 1 1 0 8 0
amappl11 152 62 0 46 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 381 0 380 1 0 1 1 0 8 0
amappl8 128 349 0 313 2 0 2 2 0 8 0
amappl7 120 118 0 107 1 0 1 1 0 8 0
amappl6 112 25 0 22 1 0 1 1 0 8 0
amappl5 104 165 0 145 1 0 1 1 0 8 0
amappl4 96 485 0 458 1 0 1 1 0 8 0
amappl3 88 109 0 103 1 0 1 1 0 8 0
amappl2 80 1085 0 1004 2 0 2 2 0 8 0
amappl1 72 15560 0 15093 22 10 12 17 0 8 2
amappl 80 571 0 520 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 3 0 0 1 0 1 1 0 8 0
uaddrrnd 24 253 0 236 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 253 0 236 1 0 1 1 0 8 0
vmmpekpl 168 6033 0 6004 2 0 2 2 0 8 0
vmmpepl 168 38108 0 35834 115 7 108 108 0 357 9
vmsppl 368 252 0 236 2 0 2 2 0 8 0
pdppl 4096 514 0 472 6 0 6 6 0 8 0
pvpl 32 140739 0 118743 178 0 178 178 0 265 0
pmappl 232 252 0 236 2 0 2 2 0 8 1
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 267 0 6 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff8247fff0) 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(ffffffff82679690) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82679690) at __mp_lock+0x127 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff82679690,1) 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(ffff800020f13820,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
sleep_finish_all(ffff800020f13820,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
sleep_finish_all(ffff800020f13820,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393
tsleep(ffffffff8260dad8,120,ffffffff821ec95f,2) at tsleep+0x1cc sys/kern/kern_synch.c:155
sys_nanosleep(ffff800020ed0760,ffff800020f13950,ffff800020f139a0) at sys_nanosleep+0x205 sys/kern/kern_time.c:298
syscall(ffff800020f13a20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f13a20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff71d8, count: 3
ddb{0}> trace
x86_ipi_db(ffffffff8247fff0) 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(ffffffff82679690) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82679690) at __mp_lock+0x127 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff82679690,1) 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(ffff800020f13820,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
sleep_finish_all(ffff800020f13820,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
sleep_finish_all(ffff800020f13820,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393
tsleep(ffffffff8260dad8,120,ffffffff821ec95f,2) at tsleep+0x1cc sys/kern/kern_synch.c:155
sys_nanosleep(ffff800020ed0760,ffff800020f13950,ffff800020f139a0) at sys_nanosleep+0x205 sys/kern/kern_time.c:298
syscall(ffff800020f13a20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f13a20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff71d8, count: -12
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(ffffffff821f90bc) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82676828,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd806a4a8a00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd806a4a8a00,0,fffffd806f6e3818,0,0,fffffd806f6e37a8) at ip_output+0xfd7 sys/netinet/ip_output.c:499
udp_output(fffffd806f6e37a8,fffffd806a4a8a00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
sosend(fffffd80681d54c8,0,ffff800023189ae0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020e92eb8,6,ffff800023189bc0,0,ffff800023189ca0) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020e92eb8,ffff800023189c58,ffff800023189ca0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023189d20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023189d20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ae567ac690, count: 2
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821f90bc) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82676828) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82676828,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806a4a8a00,3df4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd806a4a8a00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd806a4a8a00,0,fffffd806f6e3818,0,0,fffffd806f6e37a8) at ip_output+0xfd7 sys/netinet/ip_output.c:499
udp_output(fffffd806f6e37a8,fffffd806a4a8a00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
sosend(fffffd80681d54c8,0,ffff800023189ae0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020e92eb8,6,ffff800023189bc0,0,ffff800023189ca0) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020e92eb8,ffff800023189c58,ffff800023189ca0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023189d20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023189d20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ae567ac690, count: -13