panic: pool_cache_item_magic_check: mbufpl cpu free plainsitc :mo dkierfnieeld: idtieamg nadosdtr ic0x affssffefrdt8i0on6 85"!f6_k90e0rn+e16l_ l0xo0c!k_=0hex1ld66(6)d"f f8a5ie2le1bdb: 0f7bil
e
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
421859 9353 0 0 0x4000000 1 syz-executor.1
*361817 15677 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821d1d12) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff8263b560) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8263b560) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8263b560,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip_fragment(fffffd8063e17a00,ffff80000017b2a8,5b4) at ip_fragment+0x13a sys/netinet/ip_output.c:682
ip_output(fffffd8063e17a00,0,fffffd806f6e4c78,20,0,fffffd806f6e4c08) at ip_output+0xfc1 sys/netinet/ip_output.c:501
rip_output(fffffd8063e17a00,fffffd8063991b20,ffff8000219ad728,ffff800023dae000) at rip_output+0x252 sys/netinet/raw_ip.c:289
rip_usrreq(fffffd8063991b20,9,fffffd8063e17a00,0,0,ffff800020ac3878) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538
sosend(fffffd8063991b20,0,ffff8000219ad8a0,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ac3878,8,ffff8000219ad980,0,ffff8000219ada60) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ac3878,ffff8000219ada18,ffff8000219ada60) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff8000219adae0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000219adae0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x99025d244c0, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd80685f6900+16 0x0!=0x1666df85e21bb07b
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821d1d12) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff8263b560) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8263b560) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8263b560,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip_fragment(fffffd8063e17a00,ffff80000017b2a8,5b4) at ip_fragment+0x13a sys/netinet/ip_output.c:682
ip_output(fffffd8063e17a00,0,fffffd806f6e4c78,20,0,fffffd806f6e4c08) at ip_output+0xfc1 sys/netinet/ip_output.c:501
rip_output(fffffd8063e17a00,fffffd8063991b20,ffff8000219ad728,ffff800023dae000) at rip_output+0x252 sys/netinet/raw_ip.c:289
rip_usrreq(fffffd8063991b20,9,fffffd8063e17a00,0,0,ffff800020ac3878) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538
sosend(fffffd8063991b20,0,ffff8000219ad8a0,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ac3878,8,ffff8000219ad980,0,ffff8000219ada60) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ac3878,ffff8000219ada18,ffff8000219ada60) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff8000219adae0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000219adae0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x99025d244c0, count: -14
ddb{0}> show registers
rdi 0xffffffff81e05b47 db_enter+0x17
rsi 0x8a21 __ALIGN_SIZE+0x7a21
rbp 0xffff8000219ad2b0
rbx 0xffff8000219ad360
rdx 0x8a22 __ALIGN_SIZE+0x7a22
rcx 0xffff800023dae000
rax 0xffff800023dae000
r8 0xffffffff81f53faf kprintf+0x16f
r9 0x1
r10 0x25
r11 0x30d3771c5da8a8b2
r12 0x3000000008
r13 0xffff8000219ad2c0
r14 0x100
r15 0x1
rip 0xffffffff81e05b48 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000219ad2a0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=361817 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ac3398,0xffff800020ac2778
process=0xffff800020aa96a0 user=0xffff8000219a8000, vmspace=0xfffffd807f000a10
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
9353 372871 13532 0 2 0 syz-executor.1
9353 421859 13532 0 7 0x4000000 syz-executor.1
15677 354920 59418 0 2 0 syz-executor.0
*15677 361817 59418 0 7 0x4000000 syz-executor.0
65191 149495 0 0 3 0x14200 bored sosplice
59418 164234 89639 0 3 0x82 nanosleep syz-executor.0
13532 250175 89639 0 3 0x82 nanosleep syz-executor.1
89639 180000 98526 0 3 0x82 thrsleep syz-fuzzer
89639 430246 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 415422 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 8477 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 301511 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 332171 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 141557 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 418075 98526 0 3 0x4000082 kqread syz-fuzzer
89639 303958 98526 0 3 0x4000082 thrsleep syz-fuzzer
89639 250609 98526 0 3 0x4000082 thrsleep syz-fuzzer
98526 288958 3002 0 3 0x10008a pause ksh
3002 243098 35946 0 3 0x92 select sshd
47363 134552 1 0 3 0x100083 ttyin getty
35946 40778 1 0 3 0x80 select sshd
51164 484084 48084 74 3 0x100092 bpf pflogd
48084 227107 1 0 3 0x80 netio pflogd
90241 404411 7856 73 3 0x100090 kqread syslogd
7856 289099 1 0 3 0x100082 netio syslogd
73884 15501 1 77 3 0x100090 poll dhclient
12618 417943 1 0 3 0x80 poll dhclient
23385 77892 0 0 2 0x14200 zerothread
41877 458022 0 0 3 0x14200 aiodoned aiodoned
64778 300820 0 0 3 0x14200 syncer update
90179 249984 0 0 3 0x14200 cleaner cleaner
40601 359545 0 0 3 0x14200 reaper reaper
61760 430282 0 0 3 0x14200 pgdaemon pagedaemon
46404 189216 0 0 3 0x14200 bored crynlk
60258 429895 0 0 3 0x14200 bored crypto
56059 18628 0 0 3 0x40014200 acpi0 acpi0
51648 373834 0 0 3 0x40014200 idle1
68118 188249 0 0 3 0x14200 bored softnet
50876 373169 0 0 3 0x14200 bored systqmp
1123 508714 0 0 3 0x14200 bored systq
342 475505 0 0 3 0x40014200 bored softclock
71425 305380 0 0 3 0x40014200 idle0
62046 410139 0 0 3 0x14200 bored smr
1 293741 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 15677 (syz-executor.0) thread 0xffff800020ac3878 (361817)
exclusive rwlock netlock r = 0 (0xffffffff824742a8)
#0 witness_lock+0x52e 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{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9573 7204K 7591K 78643K 11994 0
pcb 13 8K 8K 78643K 102 0
rtable 100 3K 4K 78643K 407 0
ifaddr 76 14K 16K 78643K 164 0
counters 43 33K 34K 78643K 71 0
ioctlops 0 0K 4K 78643K 1482 0
iov 0 0K 16K 78643K 295 0
mount 1 1K 1K 78643K 1 0
vnodes 1225 77K 77K 78643K 1729 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 40 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 6 17K 25K 78643K 381 0
sigio 0 0K 0K 78643K 9 0
proc 61 63K 95K 78643K 527 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 46 0
in_multi 42 2K 2K 78643K 136 0
ether_multi 1 0K 0K 78643K 15 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 246 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 133 87K 103K 78643K 2317 0
UVM aobj 38 2K 2K 78643K 40 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 1K 78643K 99 0
NDP 13 0K 0K 78643K 38 0
temp 116 3013K 3077K 78643K 9196 0
kqueue 3 4K 20K 78643K 53 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 12 0 6 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 41 0 39 1 0 1 1 0 8 0
rtentry 112 86 0 46 2 0 2 2 0 8 0
unpcb 120 333 0 322 1 0 1 1 0 8 0
syncache 264 6 0 6 2 1 1 1 0 8 1
tcpqe 32 10 0 10 1 1 0 1 0 8 0
tcpcb 544 186 0 182 2 1 1 2 0 8 0
inpcb 280 571 0 563 3 1 2 2 0 8 1
nd6 48 12 0 9 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 11 0 11 2 1 1 1 0 482 1
pffrnode 88 11 0 11 2 1 1 1 0 8 1
pffrent 40 156 0 156 1 0 1 1 0 8 1
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 60 0 9 1 0 1 1 0 8 0
pfstkey 112 60 0 9 2 0 2 2 0 8 0
pfstate 328 60 0 8 5 0 5 5 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 256 418 0 218 16 2 14 16 0 8 0
art_table 32 419 0 218 2 0 2 2 0 8 0
art_node 16 85 0 48 1 0 1 1 0 8 0
sysvmsgpl 40 20 0 9 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 38 0 28 1 0 1 1 0 8 0
shmpl 112 38 0 2 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1984 0 583 46 0 46 46 0 8 0
ffsino 272 1984 0 583 95 0 95 95 0 8 0
nchpl 144 2810 0 1206 61 0 61 61 0 8 0
uvmvnodes 72 2454 0 0 45 0 45 45 0 8 0
vnodes 208 2454 0 0 130 0 130 130 0 8 0
namei 1024 8330 0 8330 1 0 1 1 0 8 1
percpumem 16 46 0 14 1 0 1 1 0 8 0
vcpupl 1984 4 0 0 1 0 1 1 0 8 0
vmpool 560 6 0 2 1 0 1 1 0 8 0
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 8195 0 8195 8 7 1 7 0 8 1
plimitpl 152 46 0 38 1 0 1 1 0 8 0
sigapl 432 577 0 561 3 1 2 3 0 8 0
futexpl 56 7968 0 7968 1 0 1 1 0 8 1
knotepl 112 124 0 105 1 0 1 1 0 8 0
kqueuepl 104 101 0 99 1 0 1 1 0 8 0
pipelkpl 48 138 0 128 1 0 1 1 0 8 0
pipepl 120 276 0 257 2 1 1 2 0 8 0
fdescpl 496 578 0 561 3 0 3 3 0 8 0
filepl 152 4398 0 4295 8 2 6 6 0 8 2
lockfpl 104 150 0 149 1 0 1 1 0 8 0
lockfspl 48 46 0 45 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 96 399 0 390 1 0 1 1 0 8 0
zombiepl 144 561 0 561 1 0 1 1 0 8 1
processpl 960 594 0 561 5 0 5 5 0 8 0
procpl 624 1449 0 1405 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 950 0 929 8 4 4 5 0 8 1
mcl64k 65536 12 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 11 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 243 0 0 30 0 30 30 0 8 0
mtagpl 80 21 0 0 1 0 1 1 0 8 0
mbufpl 256 433 0 0 26 0 26 26 0 8 0
bufpl 280 4948 0 204 339 0 339 339 0 8 0
anonpl 16 77925 0 61365 86 14 72 85 0 125 1
amapchunkpl 152 3817 0 3667 23 3 20 20 0 158 12
amappl16 192 3059 0 2102 59 10 49 58 0 8 1
amappl15 184 60 0 57 1 0 1 1 0 8 0
amappl14 176 35 0 33 1 0 1 1 0 8 0
amappl13 168 8 0 8 1 0 1 1 0 8 1
amappl12 160 4 0 4 1 1 0 1 0 8 0
amappl11 152 248 0 229 1 0 1 1 0 8 0
amappl10 144 18 0 11 1 0 1 1 0 8 0
amappl9 136 755 0 750 1 0 1 1 0 8 0
amappl8 128 276 0 252 1 0 1 1 0 8 0
amappl7 120 111 0 98 1 0 1 1 0 8 0
amappl6 112 254 0 243 1 0 1 1 0 8 0
amappl5 104 152 0 135 1 0 1 1 0 8 0
amappl4 96 833 0 801 1 0 1 1 0 8 0
amappl3 88 125 0 118 1 0 1 1 0 8 0
amappl2 80 3668 0 3583 3 1 2 3 0 8 0
amappl1 72 22791 0 22325 26 16 10 21 0 8 0
amappl 80 1732 0 1679 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 39 0 2 1 0 1 1 0 8 0
uaddrrnd 24 584 0 563 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 584 0 563 1 0 1 1 0 8 0
vmmpekpl 168 8192 0 8161 2 0 2 2 0 8 0
vmmpepl 168 79193 0 76941 150 20 130 130 0 357 32
vmsppl 368 583 0 563 2 0 2 2 0 8 0
pdppl 4096 1175 0 1130 6 0 6 6 0 8 0
pvpl 32 229874 0 210056 201 13 188 201 0 265 20
pmappl 232 583 0 563 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 204 0 10 6 0 6 6 0 8 0