panic: pool_do_get: mtagpl free list modified: page 0xfffffd806abd3000; item addr 0xfffffd806abd3008; offset 0x0=0x0 != 0x7e6088faba725153
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*400651 86675 0 0 0x4000000 0 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82223520) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_get(ffffffff8254ced0,1,ffff80001d41dd08) at pool_do_get+0x42a sys/kern/subr_pool.c:738
pool_get(ffffffff8254ced0,1) at pool_get+0xb5 sys/kern/subr_pool.c:581
m_tag_get(100,4,1) at m_tag_get+0x74 sys/kern/uipc_mbuf2.c:264
bpf_movein(ffff80001d41e1e8,ffff800000a82a00,ffff80001d41df48,ffff80001d41de48) at bpf_movein+0x355 sys/net/bpf.c:259
bpfwrite(41700,ffff80001d41e1e8,1) at bpfwrite+0x137 sys/net/bpf.c:613
spec_write(ffff80001d41e040) at spec_write+0xcc sys/kern/spec_vnops.c:309
VOP_WRITE(fffffd8056df10d0,ffff80001d41e1e8,1,fffffd806c3be960) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd805465d798,ffff80001d41e1e8,1) at vn_write+0x193 sys/kern/vfs_vnops.c:414
dofilewritev(ffff80001d36d018,1b,ffff80001d41e1e8,1,ffff80001d41e2d0) at dofilewritev+0x1ab sys/kern/sys_generic.c:364
sys_pwrite(ffff80001d36d018,ffff80001d41e288,ffff80001d41e2d0) at sys_pwrite+0x8f sys/kern/vfs_syscalls.c:3315
syscall(ffff80001d41e350) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6cec66b0d0, count: 1
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_do_get: mtagpl free list modified: page 0xfffffd806abd3000; item addr 0xfffffd806abd3008; offset 0x0=0x0 != 0x7e6088faba725153
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff82223520) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_get(ffffffff8254ced0,1,ffff80001d41dd08) at pool_do_get+0x42a sys/kern/subr_pool.c:738
pool_get(ffffffff8254ced0,1) at pool_get+0xb5 sys/kern/subr_pool.c:581
m_tag_get(100,4,1) at m_tag_get+0x74 sys/kern/uipc_mbuf2.c:264
bpf_movein(ffff80001d41e1e8,ffff800000a82a00,ffff80001d41df48,ffff80001d41de48) at bpf_movein+0x355 sys/net/bpf.c:259
bpfwrite(41700,ffff80001d41e1e8,1) at bpfwrite+0x137 sys/net/bpf.c:613
spec_write(ffff80001d41e040) at spec_write+0xcc sys/kern/spec_vnops.c:309
VOP_WRITE(fffffd8056df10d0,ffff80001d41e1e8,1,fffffd806c3be960) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_write(fffffd805465d798,ffff80001d41e1e8,1) at vn_write+0x193 sys/kern/vfs_vnops.c:414
dofilewritev(ffff80001d36d018,1b,ffff80001d41e1e8,1,ffff80001d41e2d0) at dofilewritev+0x1ab sys/kern/sys_generic.c:364
sys_pwrite(ffff80001d36d018,ffff80001d41e288,ffff80001d41e2d0) at sys_pwrite+0x8f sys/kern/vfs_syscalls.c:3315
syscall(ffff80001d41e350) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6cec66b0d0, count: -14
ddb> show registers
rdi 0xffffffff815ab277 db_enter+0x17
rsi 0x4351 __ALIGN_SIZE+0x3351
rbp 0xffff80001d41db70
rbx 0xffff80001d41dc20
rdx 0x4352 __ALIGN_SIZE+0x3352
rcx 0xffff80001f653000
rax 0xffff80001f653000
r8 0xffff80001d41db30
r9 0x1
r10 0xffff80000002a340
r11 0x2c04873e996edf82
r12 0x3000000008
r13 0xffff80001d41db80
r14 0x100
r15 0x1
rip 0xffffffff815ab278 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001d41db60
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.1) pid=400651 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff80001d36e878,0xffffffff82583be8
process=0xffff8000ffffb190 user=0xffff80001d419000, vmspace=0xfffffd806bc09000
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
86675 446447 62404 0 2 0 syz-executor.1
*86675 400651 62404 0 7 0x4000000 syz-executor.1
10458 515497 0 0 3 0x14200 bored sosplice
62404 259900 42596 0 3 0x82 nanosleep syz-executor.1
69720 471678 42596 0 3 0x82 nanosleep syz-executor.0
42596 376731 47246 0 3 0x82 thrsleep syz-fuzzer
42596 433146 47246 0 3 0x4000082 thrsleep syz-fuzzer
42596 425921 47246 0 3 0x4000082 thrsleep syz-fuzzer
42596 216177 47246 0 3 0x4000082 thrsleep syz-fuzzer
42596 193563 47246 0 3 0x4000082 thrsleep syz-fuzzer
42596 200789 47246 0 3 0x4000082 kqread syz-fuzzer
42596 162456 47246 0 3 0x4000082 thrsleep syz-fuzzer
42596 325229 47246 0 3 0x4000082 thrsleep syz-fuzzer
47246 186217 44752 0 3 0x10008a pause ksh
44752 125460 17481 0 3 0x92 select sshd
10130 398151 1 0 3 0x100083 ttyin getty
17481 427195 1 0 3 0x80 select sshd
63571 199763 83473 73 3 0x100090 kqread syslogd
83473 391438 1 0 3 0x100082 netio syslogd
87606 204276 1 77 3 0x100090 poll dhclient
81561 479331 1 0 3 0x80 poll dhclient
4061 391153 0 0 2 0x14200 zerothread
18248 187059 0 0 3 0x14200 aiodoned aiodoned
10642 78170 0 0 3 0x14200 syncer update
53578 337116 0 0 3 0x14200 cleaner cleaner
6580 414373 0 0 3 0x14200 reaper reaper
85830 178529 0 0 3 0x14200 pgdaemon pagedaemon
81853 88908 0 0 3 0x14200 bored crynlk
66865 468792 0 0 3 0x14200 bored crypto
2806 197443 0 0 3 0x40014200 acpi0 acpi0
10139 70799 0 0 3 0x14200 bored softnet
96941 76870 0 0 3 0x14200 bored systqmp
67348 16288 0 0 3 0x14200 bored systq
13555 167823 0 0 3 0x40014200 bored softclock
50705 451164 0 0 3 0x40014200 idle0
34794 334201 0 0 3 0x14200 bored smr
1 332506 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 9518 6538K 6978K 78643K 11133 0
pcb 19 8K 8K 78643K 80 0
rtable 102 3K 4K 78643K 456 0
ifaddr 84 17K 17K 78643K 122 0
counters 21 16K 16K 78643K 26 0
ioctlops 0 0K 2K 78643K 25 0
iov 0 0K 12K 78643K 112 0
mount 1 1K 1K 78643K 1 0
vnodes 1220 77K 77K 78643K 1378 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 0K 0K 78643K 2 0
sem 12 1K 1K 78643K 22 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1794 195K 288K 78643K 12646 0
file desc 5 13K 25K 78643K 235 0
sigio 0 0K 0K 78643K 4 0
proc 49 38K 63K 78643K 403 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 55 0
in_multi 81 3K 3K 78643K 134 0
ether_multi 1 0K 0K 78643K 12 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 61 281K 281K 78643K 61 0
exec 0 0K 1K 78643K 203 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 106 21K 37K 78643K 1432 0
UVM aobj 9 2K 2K 78643K 12 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 50 0
NDP 12 0K 0K 78643K 23 0
temp 106 3008K 3073K 78643K 6368 0
kqueue 3 4K 10K 78643K 33 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 7 0 1 1 0 1 1 0 8 0
rtpcb 80 243 0 241 1 0 1 1 0 8 0
rtentry 112 59 0 18 2 0 2 2 0 8 0
unpcb 120 118 0 107 1 0 1 1 0 8 0
syncache 264 7 0 7 2 1 1 1 0 8 1
tcpqe 32 129 0 129 2 1 1 1 0 8 1
tcpcb 544 113 0 107 1 0 1 1 0 8 0
ipq 40 2 0 2 2 1 1 1 0 8 1
ipqe 40 47 0 47 2 1 1 1 0 8 1
inpcb 280 373 0 357 3 1 2 2 0 8 0
rttmr 72 2 0 2 1 0 1 1 0 8 1
nd6 48 6 0 4 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 273 0 80 15 1 14 15 0 8 0
art_table 32 275 0 80 2 0 2 2 0 8 0
art_node 16 58 0 19 1 0 1 1 0 8 0
sysvmsgpl 40 18 0 9 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 10 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1764 0 365 46 0 46 46 0 8 0
ffsino 240 1764 0 365 83 0 83 83 0 8 0
nchpl 144 2345 0 730 60 0 60 60 0 8 0
uvmvnodes 72 1912 0 0 35 0 35 35 0 8 0
vnodes 208 1912 0 0 101 0 101 101 0 8 0
namei 1024 6484 0 6484 1 0 1 1 0 8 1
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 7196 0 7196 1 0 1 1 0 8 1
plimitpl 152 37 0 30 1 0 1 1 0 8 0
sigapl 432 406 0 393 2 0 2 2 0 8 0
futexpl 56 6648 0 6648 1 0 1 1 0 8 1
knotepl 112 84 0 65 1 0 1 1 0 8 0
kqueuepl 104 78 0 76 1 0 1 1 0 8 0
pipelkpl 16 158 0 148 1 0 1 1 0 8 0
pipepl 120 316 0 297 2 0 2 2 0 8 1
fdescpl 432 407 0 393 2 0 2 2 0 8 0
filepl 120 3166 0 3051 4 0 4 4 0 8 0
lockfpl 104 69 0 67 1 0 1 1 0 8 0
lockfspl 48 25 0 23 1 0 1 1 0 8 0
sessionpl 112 17 0 7 1 0 1 1 0 8 0
pgrppl 48 21 0 11 1 0 1 1 0 8 0
ucredpl 96 470 0 463 1 0 1 1 0 8 0
zombiepl 144 393 0 392 1 0 1 1 0 8 0
processpl 896 422 0 392 4 0 4 4 0 8 0
procpl 624 727 0 689 4 0 4 4 0 8 0
sosppl 128 7 0 7 2 1 1 1 0 8 1
sockpl 400 735 0 706 5 1 4 4 0 8 1
mcl64k 65536 39 0 39 1 0 1 1 0 8 1
mcl16k 16384 4 0 4 2 1 1 1 0 8 1
mcl12k 12288 5 0 5 2 1 1 1 0 8 1
mcl9k 9216 6 0 6 2 1 1 1 0 8 1
mcl8k 8192 17 0 17 2 1 1 1 0 8 1
mcl4k 4096 38 0 38 2 1 1 1 0 8 1
mcl2k2 2112 2 0 2 2 1 1 1 0 8 1
mcl2k 2048 64921 0 64873 15 8 7 14 0 8 0
mtagpl 80 27 0 2 2 1 1 1 0 8 0
mtagpl: pool(0xffffffff8254ced0:mtagpl): free list modified: page 0xfffffd806abd3000; item ordinal 0; addr 0xfffffd806abd3008 (p 0xfffffd806abd3000); offset 0x0=0x0
pool(mtagpl): free list modified: page 0xfffffd806abd3000; item ordinal 0; addr 0xfffffd806abd3008 (p 0xfffffd806abd3000); offset 0x0=0x0
mtagpl: pool(0xffffffff8254ced0:mtagpl): page inconsistency: page 0xfffffd806abd3000; item ordinal 1; addr 0xebe1bddf116864a7
mbufpl 256 106954 0 106721 42 16 26 33 0 8 6
bufpl 280 5141 0 185 354 0 354 354 0 8 0
anonpl 16 61372 0 44905 83 4 79 82 0 107 11
amapchunkpl 152 2604 0 2475 19 13 6 19 0 158 0
amappl16 192 2534 0 1623 61 10 51 58 0 8 5
amappl15 184 51 0 46 1 0 1 1 0 8 0
amappl14 176 26 0 23 1 0 1 1 0 8 0
amappl13 168 97 0 95 1 0 1 1 0 8 0
amappl12 160 4 0 4 1 1 0 1 0 8 0
amappl11 152 48 0 37 1 0 1 1 0 8 0
amappl10 144 13 0 11 1 0 1 1 0 8 0
amappl9 136 574 0 570 1 0 1 1 0 8 0
amappl8 128 107 0 86 1 0 1 1 0 8 0
amappl7 120 91 0 81 1 0 1 1 0 8 0
amappl6 112 60 0 55 1 0 1 1 0 8 0
amappl5 104 137 0 126 1 0 1 1 0 8 0
amappl4 96 719 0 689 1 0 1 1 0 8 0
amappl3 88 144 0 135 1 0 1 1 0 8 0
amappl2 80 2490 0 2421 3 1 2 3 0 8 0
amappl1 72 16893 0 16474 26 16 10 20 0 8 0
amappl 80 955 0 915 1 0 1 1 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 11 0 3 1 0 1 1 0 8 0
uaddrrnd 24 407 0 393 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 407 0 393 1 0 1 1 0 8 0
vmmpekpl 168 7053 0 7025 2 0 2 2 0 8 0
vmmpepl 168 57090 0 55094 122 21 101 117 0 357 12
vmsppl 272 406 0 393 2 1 1 2 0 8 0
pdppl 4096 820 0 786 6 1 5 6 0 8 0
pvpl 32 189952 0 170465 194 3 191 194 0 265 31
pmappl 200 406 0 393 1 0 1 1 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 188 0 33 5 0 5 5 0 8 0