panic: pool_p_free: pvpl free list modified: page 0xfffffd80687de000; item addr 0xfffffd80687de010; offset 0x0=0x0
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*443178 21547 0 0x14000 0x200 0 systqmp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8245935b) at panic+0x164 sys/kern/subr_prf.c:218
pool_p_free(ffffffff82858d80,fffffd80687def90) at pool_p_free+0x1de sys/kern/subr_pool.c:983
pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578
taskq_thread(ffffffff826d2750) at taskq_thread+0x92 sys/kern/kern_task.c:438
end trace frame: 0x0, count: 10
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
pool_p_free: pvpl free list modified: page 0xfffffd80687de000; item addr 0xfffffd80687de010; offset 0x0=0x0
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8245935b) at panic+0x164 sys/kern/subr_prf.c:218
pool_p_free(ffffffff82858d80,fffffd80687def90) at pool_p_free+0x1de sys/kern/subr_pool.c:983
pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578
taskq_thread(ffffffff826d2750) at taskq_thread+0x92 sys/kern/kern_task.c:438
end trace frame: 0x0, count: -5
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001d672760
rbx 0xffff80001d672810
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffff80001d672720
r9 0xffffffff8203e52f kprintf+0x15f
r10 0x1
r11 0x91b98ee8e98c4207
r12 0x3000000008
r13 0xffff80001d672770
r14 0x100
r15 0x1
rip 0xffffffff81989c28 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001d672750
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (systqmp) pid=443178 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=32, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff80001d652110,0xffff80001d651760
process=0xffff8000ffffe000 user=0xffff80001d66d000, vmspace=0xffffffff8284d990
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
24156 193531 47234 0 2 0 syz-executor.0
24156 462321 47234 0 2 0x4000000 syz-executor.0
24156 56001 47234 0 3 0x4000080 fsleep syz-executor.0
29029 221609 0 0 3 0x14280 nfsidl nfsio
80182 57985 0 0 3 0x14280 nfsidl nfsio
18769 450475 0 0 3 0x14280 nfsidl nfsio
39621 153613 0 0 3 0x14280 nfsidl nfsio
49804 436987 0 0 3 0x14280 nfsidl nfsio
22929 159896 0 0 3 0x14280 nfsidl nfsio
45008 165302 0 0 3 0x14280 nfsidl nfsio
81345 95862 0 0 3 0x14280 nfsidl nfsio
90935 309832 0 0 3 0x14280 nfsidl nfsio
59644 158627 0 0 3 0x14280 nfsidl nfsio
80558 170913 0 0 3 0x14280 nfsidl nfsio
8722 89516 0 0 3 0x14280 nfsidl nfsio
85743 54543 0 0 3 0x14280 nfsidl nfsio
4300 219069 0 0 3 0x14280 nfsidl nfsio
61550 115475 0 0 3 0x14280 nfsidl nfsio
55861 329906 0 0 3 0x14280 nfsidl nfsio
85950 73787 0 0 3 0x14280 nfsidl nfsio
85980 24085 0 0 3 0x14280 nfsidl nfsio
96303 298795 0 0 3 0x14280 nfsidl nfsio
77482 469055 0 0 3 0x14280 nfsidl nfsio
32740 155910 0 0 3 0x14200 bored sosplice
53091 382311 45619 0 3 0x82 piperd syz-executor.1
47234 323206 45619 0 2 0x482 syz-executor.0
45619 393226 39718 0 3 0x82 thrsleep syz-fuzzer
45619 46109 39718 0 2 0x4000482 syz-fuzzer
45619 307552 39718 0 3 0x4000082 thrsleep syz-fuzzer
45619 146732 39718 0 3 0x4000082 thrsleep syz-fuzzer
45619 317151 39718 0 3 0x4000082 thrsleep syz-fuzzer
45619 86889 39718 0 2 0x4000002 syz-fuzzer
45619 331000 39718 0 3 0x4000082 thrsleep syz-fuzzer
39718 488038 24306 0 3 0x10008a pause ksh
24306 291040 71779 0 3 0x92 select sshd
94205 107339 1 0 3 0x100083 ttyin getty
71779 190783 1 0 3 0x80 select sshd
41911 18063 57170 73 3 0x100090 kqread syslogd
57170 285325 1 0 3 0x100082 netio syslogd
52789 26791 1 77 3 0x100090 poll dhclient
67345 320387 1 0 3 0x80 poll dhclient
85058 402326 0 0 3 0x14200 bored smr
22363 230932 0 0 2 0x14200 zerothread
25362 424066 0 0 3 0x14200 aiodoned aiodoned
63544 338296 0 0 2 0x14200 update
50296 104721 0 0 3 0x14200 cleaner cleaner
11225 17767 0 0 3 0x14200 reaper reaper
30534 432103 0 0 3 0x14200 pgdaemon pagedaemon
69229 496875 0 0 3 0x14200 bored crynlk
18975 219473 0 0 3 0x14200 bored crypto
97761 373174 0 0 3 0x40014200 acpi0 acpi0
52160 290549 0 0 3 0x14200 bored softnet
*21547 443178 0 0 7 0x14200 systqmp
77185 516462 0 0 3 0x14200 bored systq
69621 461544 0 0 2 0x40014200 softclock
47873 387232 0 0 3 0x40014200 idle0
1 33319 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 9485 6337K 6915K 78643K 11301 0
pcb 13 8K 8K 78643K 102 0
rtable 73 6K 8K 78643K 623 0
ifaddr 68 14K 16K 78643K 229 0
counters 20 16K 16K 78643K 29 0
ioctlops 0 0K 4K 78643K 121 0
iov 0 0K 16K 78643K 46 0
mount 1 1K 1K 78643K 1 0
vnodes 1218 77K 77K 78643K 1442 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 17 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 150 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 195K 288K 78643K 12938 0
file desc 5 13K 25K 78643K 591 0
sigio 0 0K 0K 78643K 7 0
proc 49 38K 63K 78643K 412 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 41 0
in_multi 42 2K 3K 78643K 142 0
ether_multi 1 0K 0K 78643K 16 0
mrt 2 0K 0K 78643K 13 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 201 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 126 22K 38K 78643K 2288 0
UVM aobj 29 7K 7K 78643K 35 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 84 0
NDP 10 0K 0K 78643K 34 0
temp 111 3864K 3928K 78643K 4270 0
kqueue 3 4K 8K 78643K 15 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 6 0 4 1 0 1 1 0 8 0
rtpcb 80 39 0 37 1 0 1 1 0 8 0
rtentry 112 76 0 59 2 0 2 2 0 8 0
unpcb 120 319 0 311 1 0 1 1 0 8 0
syncache 264 7 0 7 3 3 0 1 0 8 0
tcpqe 32 159 0 159 1 1 0 1 0 8 0
tcpcb 544 689 0 684 8 7 1 4 0 8 0
ipq 40 3 0 3 2 2 0 1 0 8 0
ipqe 40 8 0 8 2 2 0 1 0 8 0
inpcb 296 1024 0 1016 5 4 1 2 0 8 0
rttmr 72 4 0 4 2 2 0 1 0 8 0
nd6 48 18 0 17 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1136 1 0 1 1 1 0 1 0 8 0
pfrktable 1344 126 0 118 1 0 1 1 0 8 0
pftag 88 36 0 34 4 3 1 1 0 8 0
pfstitem 24 1 0 0 1 0 1 1 0 8 0
pfstkey 112 2 0 1 1 0 1 1 0 8 0
pfstate 328 2 0 1 1 0 1 1 0 8 0
pfrule 1360 44 0 30 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 451 0 354 15 2 13 15 0 8 1
art_table 32 452 0 354 2 0 2 2 0 8 0
art_node 16 75 0 62 1 0 1 1 0 8 0
sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 148 0 138 1 0 1 1 0 8 0
shmpl 112 32 0 6 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2128 0 735 88 0 88 88 0 8 0
ffsino 240 2128 0 735 83 0 83 83 0 8 0
nchpl 144 3109 0 1521 60 0 60 60 0 8 0
uvmvnodes 72 2337 0 0 43 0 43 43 0 8 0
vnodes 208 2337 0 0 123 0 123 123 0 8 0
namei 1024 8373 0 8373 1 0 1 1 0 8 1
pfiaddrpl 120 48 0 40 1 0 1 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 8786 0 8786 1 0 1 1 0 8 1
plimitpl 152 50 0 43 1 0 1 1 0 8 0
sigapl 424 798 0 749 6 0 6 6 0 8 0
futexpl 56 11527 0 11526 1 0 1 1 0 8 0
knotepl 112 82 0 62 1 0 1 1 0 8 0
kqueuepl 144 58 0 56 1 0 1 1 0 8 0
pipepl 272 128 0 115 2 1 1 2 0 8 0
fdescpl 432 763 0 749 2 0 2 2 0 8 0
filepl 120 4464 0 4362 4 0 4 4 0 8 0
lockfpl 104 80 0 79 1 0 1 1 0 8 0
lockfspl 48 33 0 32 1 0 1 1 0 8 0
sessionpl 112 17 0 7 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 353 0 346 1 0 1 1 0 8 0
zombiepl 144 749 0 749 1 0 1 1 0 8 1
processpl 928 798 0 749 7 0 7 7 0 8 0
procpl 624 1592 0 1535 5 0 5 5 0 8 0
sosppl 128 4 0 4 1 1 0 1 0 8 0
sockpl 400 1384 0 1366 3 0 3 3 0 8 1
mcl64k 65536 31 0 31 4 4 0 1 0 8 0
mcl16k 16384 2 0 2 1 1 0 1 0 8 0
mcl12k 12288 19 0 19 5 4 1 1 0 8 1
mcl9k 9216 10 0 10 4 4 0 1 0 8 0
mcl8k 8192 22 0 22 5 4 1 1 0 8 1
mcl4k 4096 47 0 47 4 4 0 1 0 8 0
mcl2k2 2112 8 0 8 3 3 0 1 0 8 0
mcl2k 2048 94491 0 94447 17 11 6 13 0 8 0
mtagpl 96 61 0 32 3 1 2 2 0 8 0
mbufpl 256 152676 0 152469 20 6 14 17 0 8 0
bufpl 280 4088 0 115 284 0 284 284 0 8 0
anonpl 16 88736 0 70740 93 18 75 90 0 107 0
amapchunkpl 152 4907 0 4722 26 18 8 22 0 158 0
amappl16 192 3440 0 2472 66 17 49 61 0 8 0
amappl15 184 3 0 0 1 0 1 1 0 8 0
amappl14 176 345 0 342 1 0 1 1 0 8 0
amappl13 168 240 0 236 1 0 1 1 0 8 0
amappl12 160 236 0 232 1 0 1 1 0 8 0
amappl11 152 390 0 379 1 0 1 1 0 8 0
amappl10 144 15 0 10 1 0 1 1 0 8 0
amappl9 136 352 0 351 1 0 1 1 0 8 0
amappl8 128 294 0 264 1 0 1 1 0 8 0
amappl7 120 103 0 91 1 0 1 1 0 8 0
amappl6 112 28 0 23 1 0 1 1 0 8 0
amappl5 104 150 0 140 1 0 1 1 0 8 0
amappl4 96 988 0 958 1 0 1 1 0 8 0
amappl3 88 705 0 693 1 0 1 1 0 8 0
amappl2 80 5292 0 5227 2 0 2 2 0 8 0
amappl1 72 27224 0 26807 22 12 10 17 0 8 0
amappl 80 1810 0 1758 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 34 0 6 1 0 1 1 0 8 0
uaddrrnd 24 763 0 749 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 763 0 749 1 0 1 1 0 8 0
vmmpekpl 168 8321 0 8292 2 0 2 2 0 8 0
vmmpepl 168 100640 0 98578 134 44 90 115 0 357 0
vmsppl 272 762 0 749 2 1 1 2 0 8 0
pdppl 4096 1532 0 1498 6 1 5 6 0 8 0
pvpl 32 259219 0 237590 226 46 180 217 0 265 5
pmappl 200 762 0 749 1 0 1 1 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 272 0 44 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(ffffffff8245935b) at panic+0x164 sys/kern/subr_prf.c:218
pool_p_free(ffffffff82858d80,fffffd80687def90) at pool_p_free+0x1de sys/kern/subr_pool.c:983
pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578
taskq_thread(ffffffff826d2750) at taskq_thread+0x92 sys/kern/kern_task.c:438
end trace frame: 0x0, count: -5
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8245935b) at panic+0x164 sys/kern/subr_prf.c:218
pool_p_free(ffffffff82858d80,fffffd80687def90) at pool_p_free+0x1de sys/kern/subr_pool.c:983
pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578
taskq_thread(ffffffff826d2750) at taskq_thread+0x92 sys/kern/kern_task.c:438
end trace frame: 0x0, count: -5