panic: pr_find_pagehead: mbufpl: incorrect page
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 22182 90730 0 0x14000 0x200 0 systqmp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240a5f0) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff828b8b28,fffffd806b090000) at pool_do_put+0x37a
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 pool_cache_list_put sys/kern/subr_pool.c:1973 [inline]
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 sys/kern/subr_pool.c:2025
pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559
taskq_thread(ffffffff827ab3f0) at taskq_thread+0xec sys/kern/kern_task.c:437
end trace frame: 0x0, count: 9
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pr_find_pagehead: mbufpl: incorrect page
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240a5f0) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff828b8b28,fffffd806b090000) at pool_do_put+0x37a
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 pool_cache_list_put sys/kern/subr_pool.c:1973 [inline]
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 sys/kern/subr_pool.c:2025
pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559
taskq_thread(ffffffff827ab3f0) at taskq_thread+0xec sys/kern/kern_task.c:437
end trace frame: 0x0, count: -6
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020da3530
rbx 0xffff800020da35e0
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff811209cf kprintf+0x16f
r9 0x1
r10 0x2
r11 0x922d23343529c49a
r12 0x3000000008
r13 0xffff800020da3540
r14 0x100
r15 0x1
rip 0xffffffff81de3468 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020da3520
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (systqmp) pid=22182 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=32, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020d89110,0xffff800020d88760
process=0xffff800020d8af80 user=0xffff800020d9e000, vmspace=0xffffffff828fddc8
estcpu=0, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
65045 439474 0 0 3 0x14200 bored sosplice
5475 301645 92836 0 3 0x82 wait syz-executor.1
71206 386626 0 0 3 0x14280 nfsidl nfsio
72964 339342 0 0 3 0x14280 nfsidl nfsio
74665 269394 0 0 3 0x14280 nfsidl nfsio
75114 66722 0 0 3 0x14280 nfsidl nfsio
75442 52527 0 0 3 0x14280 nfsidl nfsio
37785 59106 0 0 3 0x14280 nfsidl nfsio
44365 361518 0 0 3 0x14280 nfsidl nfsio
398 393029 0 0 3 0x14280 nfsidl nfsio
87030 215027 0 0 3 0x14280 nfsidl nfsio
97240 492366 0 0 3 0x14280 nfsidl nfsio
55826 309487 0 0 3 0x14280 nfsidl nfsio
91362 418492 0 0 3 0x14280 nfsidl nfsio
31979 491241 0 0 3 0x14280 nfsidl nfsio
63416 290982 0 0 3 0x14280 nfsidl nfsio
45824 110439 0 0 3 0x14280 nfsidl nfsio
60869 92868 0 0 3 0x14280 nfsidl nfsio
69017 339793 0 0 3 0x14280 nfsidl nfsio
94585 312283 0 0 3 0x14280 nfsidl nfsio
44646 206492 0 0 3 0x14280 nfsidl nfsio
57431 115584 0 0 3 0x14280 nfsidl nfsio
33348 428089 92836 0 3 0x82 piperd syz-executor.0
92836 231379 62819 0 3 0x82 thrsleep syz-fuzzer
92836 393916 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 8772 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 356841 62819 0 3 0x4000082 kqread syz-fuzzer
92836 505216 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 442739 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 232241 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 115184 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 268450 62819 0 3 0x4000082 thrsleep syz-fuzzer
92836 110577 62819 0 3 0x4000082 thrsleep syz-fuzzer
62819 261360 35215 0 3 0x10008a pause ksh
35215 321836 40673 0 3 0x92 select sshd
723 397498 1 0 3 0x100083 ttyin getty
40673 386045 1 0 3 0x80 select sshd
28470 163983 21993 74 3 0x100092 bpf pflogd
21993 144174 1 0 3 0x80 netio pflogd
60068 231053 86412 73 3 0x100090 kqread syslogd
86412 339624 1 0 3 0x100082 netio syslogd
38068 127823 1 77 3 0x100090 poll dhclient
36709 105563 1 0 3 0x80 poll dhclient
51464 108423 0 0 3 0x14200 bored smr
75470 58591 0 0 3 0x14200 pgzero zerothread
79497 311796 0 0 3 0x14200 aiodoned aiodoned
32427 149345 0 0 3 0x14200 syncer update
41774 180774 0 0 3 0x14200 cleaner cleaner
62122 398180 0 0 3 0x14200 reaper reaper
82714 390826 0 0 3 0x14200 pgdaemon pagedaemon
54606 116169 0 0 3 0x14200 bored crynlk
62644 176729 0 0 3 0x14200 bored crypto
55380 162014 0 0 3 0x40014200 acpi0 acpi0
98424 37494 0 0 7 0x40014200 idle1
56725 374729 0 0 3 0x14200 bored softnet
*90730 22182 0 0 7 0x14200 systqmp
1093 69856 0 0 3 0x14200 bored systq
72443 446654 0 0 3 0x40014200 bored softclock
19788 112373 0 0 3 0x40014200 idle0
1 400249 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex mbufpl r = 0 (0xffffffff828b8b38)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 pool_cache_gc+0x12d pl_enter sys/kern/subr_pool.c:104 [inline]
#3 pool_cache_gc+0x12d pool_cache_list_put sys/kern/subr_pool.c:1968 [inline]
#3 pool_cache_gc+0x12d sys/kern/subr_pool.c:2025
#4 pool_gc_pages+0x6c sys/kern/subr_pool.c:1559
#5 taskq_thread+0xec sys/kern/kern_task.c:437
#6 proc_trampoline+0x1c
Process 90730 (systqmp) thread 0xffff800020d889c0 (22182)
shared rwlock pools r = 0 (0xffffffff8275ed10)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 pool_gc_pages+0x21 sys/kern/subr_pool.c:1555
#2 taskq_thread+0xec sys/kern/kern_task.c:437
#3 proc_trampoline+0x1c
shared rwlock systqmp r = 0 (0xffffffff827ab460)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 taskq_thread+0xdf sys/kern/kern_task.c:436
#2 proc_trampoline+0x1c
exclusive mutex mbufpl r = 0 (0xffffffff828b8b38)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 pool_cache_gc+0x12d pl_enter sys/kern/subr_pool.c:104 [inline]
#3 pool_cache_gc+0x12d pool_cache_list_put sys/kern/subr_pool.c:1968 [inline]
#3 pool_cache_gc+0x12d sys/kern/subr_pool.c:2025
#4 pool_gc_pages+0x6c sys/kern/subr_pool.c:1559
#5 taskq_thread+0xec sys/kern/kern_task.c:437
#6 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9492 6405K 6858K 78643K 11335 0
pcb 13 8K 8K 78643K 46 0
rtable 99 13K 16K 78643K 479 0
ifaddr 59 13K 15K 78643K 140 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 59 0
ioctlops 0 0K 4K 78643K 1545 0
iov 0 0K 16K 78643K 36 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1465 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 9 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 93 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 458 0
sigio 0 0K 0K 78643K 13 0
proc 61 63K 95K 78643K 500 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 29 0
in_multi 42 2K 2K 78643K 80 0
ether_multi 1 0K 0K 78643K 5 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 49 228K 228K 78643K 49 0
exec 0 0K 1K 78643K 243 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 132 39K 40K 78643K 2451 0
UVM aobj 14 2K 2K 78643K 15 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 26 0
NDP 8 0K 0K 78643K 23 0
temp 106 3864K 3930K 78643K 4257 0
kqueue 3 4K 8K 78643K 28 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 33 0 31 1 0 1 1 0 8 0
rtentry 112 65 0 30 2 0 2 2 0 8 0
unpcb 120 1233 0 1223 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 1588 0 1588 3 3 0 2 0 8 0
tcpcb 544 132 0 128 2 1 1 2 0 8 0
inpcb 296 387 0 375 5 4 1 2 0 8 0
rttmr 72 2 0 2 1 1 0 1 0 8 0
nd6 48 12 0 6 1 0 1 1 0 8 0
ppxss 1136 2 0 2 2 2 0 1 0 8 0
pffrent 40 2 0 2 1 1 0 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 73 0 70 1 0 1 1 0 8 0
pfstitem 24 19 0 17 1 0 1 1 0 8 0
pfstkey 112 19 0 17 1 0 1 1 0 8 0
pfstate 328 19 0 17 2 0 2 2 0 8 1
pfrule 1360 36 0 28 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 331 0 125 14 1 13 13 0 8 0
art_table 32 332 0 125 2 0 2 2 0 8 0
art_node 16 64 0 34 1 0 1 1 0 8 0
sysvmsgpl 40 23 0 10 1 0 1 1 0 8 0
semupl 112 3 0 3 3 3 0 1 0 8 0
semapl 112 89 0 79 1 0 1 1 0 8 0
shmpl 112 12 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1965 0 558 89 0 89 89 0 8 0
ffsino 272 1965 0 558 96 2 94 95 0 8 0
nchpl 144 2900 0 1305 60 0 60 60 0 8 0
uvmvnodes 72 2196 0 0 40 0 40 40 0 8 0
vnodes 208 2196 0 0 116 0 116 116 0 8 0
namei 1024 7902 0 7902 4 3 1 1 0 8 1
percpumem 16 40 0 8 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 21 0 19 2 1 1 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 8239 0 8239 10 9 1 7 0 8 1
plimitpl 152 29 0 21 1 0 1 1 0 8 0
sigapl 424 691 0 639 6 0 6 6 0 8 0
futexpl 56 6101 0 6101 3 2 1 1 0 8 1
knotepl 112 104 0 85 1 0 1 1 0 8 0
kqueuepl 144 58 0 56 1 0 1 1 0 8 0
pipepl 304 116 0 106 3 2 1 2 0 8 0
fdescpl 496 655 0 639 3 0 3 3 0 8 0
filepl 152 4243 0 4134 7 2 5 6 0 8 0
lockfpl 104 72 0 71 1 0 1 1 0 8 0
lockfspl 48 23 0 22 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 14 1 0 1 1 0 8 0
ucredpl 96 438 0 428 1 0 1 1 0 8 0
zombiepl 144 640 0 639 2 1 1 1 0 8 0
processpl 992 691 0 639 8 1 7 7 0 8 0
procpl 624 1646 0 1585 8 2 6 6 0 8 0
srpgc 64 2 0 2 1 1 0 1 0 8 0
sosppl 128 7 0 7 2 2 0 1 0 8 0
sockpl 400 1657 0 1633 9 6 3 4 0 8 0
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 4 0 0 1 0 1 1 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 326 0 0 40 0 40 40 0 8 0
mtagpl 96 55 0 0 2 0 2 2 0 8 0
mbufpl 256 339 0 0 22 1 21 21 0 8 0
bufpl 280 4255 0 133 295 0 295 295 0 8 0
anonpl 16 82628 0 65175 89 17 72 87 0 124 0
amapchunkpl 152 3569 0 3411 8 0 8 8 0 158 0
amappl16 192 2918 0 1981 61 13 48 59 0 8 0
amappl15 184 132 0 129 1 0 1 1 0 8 0
amappl14 176 100 0 94 1 0 1 1 0 8 0
amappl13 168 240 0 236 1 0 1 1 0 8 0
amappl12 160 8 0 5 1 0 1 1 0 8 0
amappl11 152 136 0 121 1 0 1 1 0 8 0
amappl10 144 153 0 147 1 0 1 1 0 8 0
amappl9 136 388 0 387 1 0 1 1 0 8 0
amappl8 128 387 0 349 2 0 2 2 0 8 0
amappl7 120 255 0 241 1 0 1 1 0 8 0
amappl6 112 106 0 97 1 0 1 1 0 8 0
amappl5 104 498 0 483 1 0 1 1 0 8 0
amappl4 96 788 0 757 1 0 1 1 0 8 0
amappl3 88 109 0 102 1 0 1 1 0 8 0
amappl2 80 4192 0 4123 2 0 2 2 0 8 0
amappl1 72 28799 0 28320 23 13 10 18 0 8 0
amappl 80 1896 0 1847 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 14 0 1 1 0 1 1 0 8 0
uaddrrnd 24 657 0 639 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 657 0 639 1 0 1 1 0 8 0
vmmpekpl 168 9128 0 9084 3 0 3 3 0 8 0
vmmpepl 168 91436 0 89271 157 57 100 129 0 357 1
vmsppl 368 656 0 639 2 0 2 2 0 8 0
pdppl 4096 1321 0 1280 7 1 6 6 0 8 0
pvpl 32 257038 0 236214 213 40 173 207 0 265 0
pmappl 232 656 0 639 4 2 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 306 0 20 10 1 9 9 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240a5f0) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff828b8b28,fffffd806b090000) at pool_do_put+0x37a
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 pool_cache_list_put sys/kern/subr_pool.c:1973 [inline]
pool_cache_gc(ffffffff828b8b28) at pool_cache_gc+0x144 sys/kern/subr_pool.c:2025
pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559
taskq_thread(ffffffff827ab3f0) at taskq_thread+0xec sys/kern/kern_task.c:437
end trace frame: 0x0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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
acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187
sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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
acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187
sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5