panic: m_copym0: m == NULL and not COPYALL
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*351152 12953 0 0x12 0 0 sshd
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82422f01) at panic+0x164 sys/kern/subr_prf.c:218
m_copym(fffffd805e206700,2a4,3b4,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664
tcp_output(ffff800000ac5280) at tcp_output+0x154d sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd805da73328,9,fffffd805e206600,0,0,ffff80001d702c68) at tcp_usrreq+0xa54
sosend(fffffd805da73328,0,ffff80001d71f138,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555
dofilewritev(ffff80001d702c68,4,ffff80001d71f138,0,ffff80001d71f220) at dofilewritev+0x1ab sys/kern/sys_generic.c:365
sys_write(ffff80001d702c68,ffff80001d71f1d0,ffff80001d71f220) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff80001d71f2a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe35b0, count: 5
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
m_copym0: m == NULL and not COPYALL
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82422f01) at panic+0x164 sys/kern/subr_prf.c:218
m_copym(fffffd805e206700,2a4,3b4,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664
tcp_output(ffff800000ac5280) at tcp_output+0x154d sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd805da73328,9,fffffd805e206600,0,0,ffff80001d702c68) at tcp_usrreq+0xa54
sosend(fffffd805da73328,0,ffff80001d71f138,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555
dofilewritev(ffff80001d702c68,4,ffff80001d71f138,0,ffff80001d71f220) at dofilewritev+0x1ab sys/kern/sys_generic.c:365
sys_write(ffff80001d702c68,ffff80001d71f1d0,ffff80001d71f220) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff80001d71f2a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe35b0, count: -10
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001d71ec00
rbx 0xffff80001d71ecb0
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffff80001d71ebc0
r9 0xffffffff821f998f kprintf+0x15f
r10 0x1
r11 0xa1a2fd528d914d70
r12 0x3000000008
r13 0xffff80001d71ec10
r14 0x100
r15 0x1
rip 0xffffffff81589c68 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001d71ebf0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (sshd) pid=351152 stat=onproc
flags process=12<EXEC,SUGID,8ORPHAN> proc=0
pri=24, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff80001d703158,0xffff80001d702510
process=0xffff80001d705288 user=0xffff80001d71a000, vmspace=0xfffffd806bc0a990
estcpu=0, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
16701 289632 33579 0 2 0 syz-executor.1
16701 440120 33579 0 3 0x4000080 poll syz-executor.1
66557 31019 92797 0 2 0x2 syz-executor.0
33579 320241 92797 0 3 0x82 nanosleep syz-executor.1
13161 149211 0 0 3 0x14200 bored sosplice
92797 207261 61139 0 3 0x82 thrsleep syz-fuzzer
92797 393864 61139 0 2 0x4000002 syz-fuzzer
92797 102625 61139 0 3 0x4000082 thrsleep syz-fuzzer
92797 325866 61139 0 3 0x4000082 thrsleep syz-fuzzer
92797 271945 61139 0 3 0x4000082 thrsleep syz-fuzzer
92797 512710 61139 0 2 0x4000002 syz-fuzzer
92797 389115 61139 0 3 0x4000082 thrsleep syz-fuzzer
61139 177685 12953 0 3 0x10008a pause ksh
*12953 351152 2701 0 7 0x12 sshd
3660 234337 1 0 3 0x100083 ttyin getty
2701 33599 1 0 3 0x80 select sshd
68255 253986 45264 73 3 0x100090 kqread syslogd
45264 302093 1 0 3 0x100082 netio syslogd
59221 265501 1 77 3 0x100090 poll dhclient
73890 340299 1 0 3 0x80 poll dhclient
91272 147876 0 0 3 0x14200 bored smr
27721 521282 0 0 2 0x14200 zerothread
3388 392524 0 0 3 0x14200 aiodoned aiodoned
68954 230723 0 0 3 0x14200 syncer update
49561 144051 0 0 3 0x14200 cleaner cleaner
81521 37340 0 0 3 0x14200 reaper reaper
58390 312188 0 0 3 0x14200 pgdaemon pagedaemon
55331 19788 0 0 3 0x14200 bored crynlk
4608 195379 0 0 3 0x14200 bored crypto
66404 368430 0 0 3 0x40014200 acpi0 acpi0
83631 258824 0 0 3 0x14200 bored softnet
68436 234954 0 0 3 0x14200 bored systqmp
80792 303554 0 0 3 0x14200 bored systq
64471 507986 0 0 3 0x40014200 bored softclock
67362 11003 0 0 3 0x40014200 idle0
1 143908 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9493 6340K 6599K 78643K 10882 0
pcb 13 8K 8K 78643K 87 0
rtable 118 5K 7K 78643K 492 0
ifaddr 70 14K 14K 78643K 175 0
sysctl 2 0K 0K 78643K 2 0
counters 21 16K 16K 78643K 25 0
ioctlops 0 0K 4K 78643K 77 0
iov 0 0K 16K 78643K 34 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1371 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 1K 78643K 76 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 195K 288K 78643K 12938 0
file desc 5 13K 25K 78643K 390 0
sigio 0 0K 0K 78643K 4 0
proc 49 38K 55K 78643K 465 0
subproc 32 2K 2K 78643K 68 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 68 0
in_multi 51 3K 3K 78643K 139 0
ether_multi 1 0K 0K 78643K 15 0
mrt 0 0K 0K 78643K 4 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 220 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 125 39K 39K 78643K 1799 0
UVM aobj 11 2K 2K 78643K 13 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 62 0
NDP 11 0K 0K 78643K 30 0
temp 110 3863K 3929K 78643K 6572 0
kqueue 3 4K 8K 78643K 13 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 10 0 4 1 0 1 1 0 8 0
rtpcb 88 37 0 35 1 0 1 1 0 8 0
rtentry 112 84 0 39 2 0 2 2 0 8 0
unpcb 120 1025 0 1017 1 0 1 1 0 8 0
syncache 272 4 0 4 1 1 0 1 0 8 0
tcpqe 32 121 0 121 1 1 0 1 0 8 0
tcpcb 592 154 0 146 3 1 2 2 0 8 0
ipq 40 2 0 2 1 1 0 1 0 8 0
ipqe 40 8 0 8 1 1 0 1 0 8 0
inpcb 296 767 0 760 4 2 2 2 0 8 1
rttmr 72 2 0 2 1 0 1 1 0 8 1
nd6 48 23 0 17 1 0 1 1 0 8 0
pkpcb 40 8 0 8 1 0 1 1 0 8 1
ppxss 1136 1 0 1 1 1 0 1 0 8 0
pfrktable 1344 69 0 67 4 3 1 1 0 8 0
pftag 88 25 0 24 2 1 1 1 0 8 0
pfrule 1360 24 0 18 2 1 1 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 331 0 136 15 2 13 15 0 8 0
art_table 32 333 0 136 2 0 2 2 0 8 0
art_node 16 81 0 40 1 0 1 1 0 8 0
sysvmsgpl 40 44 0 35 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 72 0 62 1 0 1 1 0 8 0
shmpl 112 10 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1862 0 467 88 0 88 88 0 8 0
ffsino 240 1862 0 467 83 0 83 83 0 8 0
nchpl 144 2551 0 975 60 0 60 60 0 8 0
uvmvnodes 72 2010 0 0 37 0 37 37 0 8 0
vnodes 208 2010 0 0 106 0 106 106 0 8 0
namei 1024 6917 0 6917 3 2 1 1 0 8 1
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 528 1 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 20 0 18 4 3 1 1 0 8 0
scxspl 200 7383 0 7383 2 1 1 1 0 8 1
plimitpl 152 46 0 39 1 0 1 1 0 8 0
sigapl 424 571 0 542 4 0 4 4 0 8 0
futexpl 56 8082 0 8082 3 2 1 1 0 8 1
knotepl 112 97 0 77 1 0 1 1 0 8 0
kqueuepl 152 50 0 48 1 0 1 1 0 8 0
pipepl 272 131 0 119 2 0 2 2 0 8 1
fdescpl 432 556 0 542 2 0 2 2 0 8 0
filepl 120 4135 0 4036 6 0 6 6 0 8 3
lockfpl 104 37 0 36 1 0 1 1 0 8 0
lockfspl 48 17 0 16 1 0 1 1 0 8 0
sessionpl 120 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 364 0 356 1 0 1 1 0 8 0
zombiepl 144 542 0 542 1 0 1 1 0 8 1
processpl 944 571 0 542 4 0 4 4 0 8 0
procpl 632 992 0 956 4 0 4 4 0 8 0
sosppl 144 5 0 5 2 1 1 1 0 8 1
sockpl 400 1846 0 1829 7 3 4 4 0 8 2
mcl64k 65536 14 0 14 4 3 1 1 0 8 1
mcl16k 16384 3 0 3 3 2 1 1 0 8 1
mcl12k 12288 11 0 11 2 1 1 1 0 8 1
mcl9k 9216 8 0 8 2 1 1 1 0 8 1
mcl8k 8192 16 0 16 3 2 1 1 0 8 1
mcl4k 4096 36 0 36 4 3 1 1 0 8 1
mcl2k2 2112 2 0 2 1 0 1 1 0 8 1
mcl2k 2048 90373 0 90312 18 10 8 16 0 8 0
mtagpl 96 24 0 19 2 1 1 1 0 8 0
mbufpl 256 145905 0 145784 18 6 12 14 0 8 0
bufpl 280 3915 0 122 271 0 271 271 0 8 0
anonpl 16 72225 0 56021 76 2 74 75 0 107 0
amapchunkpl 152 2676 0 2485 10 1 9 10 0 158 0
amappl16 192 2466 0 1505 51 1 50 50 0 8 1
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 12 0 9 1 0 1 1 0 8 0
amappl13 168 113 0 106 1 0 1 1 0 8 0
amappl12 160 96 0 91 1 0 1 1 0 8 0
amappl11 152 142 0 133 1 0 1 1 0 8 0
amappl10 144 70 0 66 1 0 1 1 0 8 0
amappl9 136 478 0 477 1 0 1 1 0 8 0
amappl8 128 456 0 429 1 0 1 1 0 8 0
amappl7 120 163 0 151 1 0 1 1 0 8 0
amappl6 112 116 0 109 1 0 1 1 0 8 0
amappl5 104 412 0 401 1 0 1 1 0 8 0
amappl4 96 532 0 499 1 0 1 1 0 8 0
amappl3 88 202 0 192 1 0 1 1 0 8 0
amappl2 80 3495 0 3431 2 0 2 2 0 8 0
amappl1 72 21695 0 21279 24 15 9 17 0 8 0
amappl 80 1280 0 1224 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 12 0 2 1 0 1 1 0 8 0
uaddrrnd 24 557 0 542 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 557 0 542 1 0 1 1 0 8 0
vmmpekpl 168 7435 0 7409 2 0 2 2 0 8 0
vmmpepl 168 76132 0 74065 156 37 119 149 0 357 28
vmsppl 272 556 0 542 3 1 2 2 0 8 1
pdppl 4096 1120 0 1085 6 1 5 6 0 8 0
pvpl 32 218074 0 198870 175 2 173 175 0 265 0
pmappl 200 556 0 542 1 0 1 1 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 267 0 39 7 0 7 7 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82422f01) at panic+0x164 sys/kern/subr_prf.c:218
m_copym(fffffd805e206700,2a4,3b4,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664
tcp_output(ffff800000ac5280) at tcp_output+0x154d sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd805da73328,9,fffffd805e206600,0,0,ffff80001d702c68) at tcp_usrreq+0xa54
sosend(fffffd805da73328,0,ffff80001d71f138,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555
dofilewritev(ffff80001d702c68,4,ffff80001d71f138,0,ffff80001d71f220) at dofilewritev+0x1ab sys/kern/sys_generic.c:365
sys_write(ffff80001d702c68,ffff80001d71f1d0,ffff80001d71f220) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff80001d71f2a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe35b0, count: -10
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82422f01) at panic+0x164 sys/kern/subr_prf.c:218
m_copym(fffffd805e206700,2a4,3b4,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664
tcp_output(ffff800000ac5280) at tcp_output+0x154d sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd805da73328,9,fffffd805e206600,0,0,ffff80001d702c68) at tcp_usrreq+0xa54
sosend(fffffd805da73328,0,ffff80001d71f138,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555
dofilewritev(ffff80001d702c68,4,ffff80001d71f138,0,ffff80001d71f220) at dofilewritev+0x1ab sys/kern/sys_generic.c:365
sys_write(ffff80001d702c68,ffff80001d71f1d0,ffff80001d71f220) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff80001d71f2a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe35b0, count: -10