panic: malloc: allocation too large, type = 2, size = 18446744073709550336pa
n
ic
:Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*276679 27691 0 0 0x4000000 0 syz-executor.0
459612 51729 0 0 0x4000000 1 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
malloc(fffffffffffffb00,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344
vm_get_info(ffff800021d55810) at vm_get_info+0x9d
VOP_IOCTL(fffffd806ebc9a90,c0185603,ffff800021d55810,1,fffffd807f7c68a0,ffff800020ab18c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291
vn_ioctl(fffffd80797f7428,c0185603,ffff800021d55810,ffff800020ab18c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524
sys_ioctl(ffff800020ab18c8,ffff800021d55928,ffff800021d55970) at sys_ioctl+0x5b9
syscall(ffff800021d559f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800021d559f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff53,0,3,aba87131010) at Xsyscall+0x128
end of kernel
end trace frame: 0xabcf23cacb0, count: 6
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
malloc: allocation too large, type = 2, size = 18446744073709550336
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
malloc(fffffffffffffb00,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344
vm_get_info(ffff800021d55810) at vm_get_info+0x9d
VOP_IOCTL(fffffd806ebc9a90,c0185603,ffff800021d55810,1,fffffd807f7c68a0,ffff800020ab18c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291
vn_ioctl(fffffd80797f7428,c0185603,ffff800021d55810,ffff800020ab18c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524
sys_ioctl(ffff800020ab18c8,ffff800021d55928,ffff800021d55970) at sys_ioctl+0x5b9
syscall(ffff800021d559f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800021d559f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff53,0,3,aba87131010) at Xsyscall+0x128
end of kernel
end trace frame: 0xabcf23cacb0, count: -9
ddb{0}> show registers
rdi 0xffffffff818a6867 db_enter+0x17
rsi 0x1edd __ALIGN_SIZE+0xedd
rbp 0xffff800021d55450
rbx 0xffff800021d55500
rdx 0x1ede __ALIGN_SIZE+0xede
rcx 0xffff800020b4a000
rax 0xffff800020b4a000
r8 0xffffffff81e023df kprintf+0x16f
r9 0x1
r10 0x25
r11 0x8b08e209a4f8da8d
r12 0x3000000008
r13 0xffff800021d55460
r14 0x100
r15 0x1
rip 0xffffffff818a6868 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021d55440
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=276679 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=83, usrpri=83, nice=20
forw=0xffffffffffffffff, list=0xffff800020a5f150,0xffffffff8263bd20
process=0xffff800020a8aa90 user=0xffff800021d50000, vmspace=0xfffffd807f00b730
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
27691 459149 36825 0 2 0 syz-executor.0
*27691 276679 36825 0 7 0x4000000 syz-executor.0
51729 438843 68129 0 2 0 syz-executor.1
51729 459612 68129 0 7 0x4000000 syz-executor.1
68129 302765 67658 0 3 0x82 nanosleep syz-executor.1
36825 165968 67658 0 3 0x82 nanosleep syz-executor.0
61880 279338 1 0 3 0x100083 ttyin getty
4879 454493 0 0 3 0x14200 acct acct
55087 30276 0 0 3 0x14200 bored sosplice
67658 227094 72192 0 3 0x82 thrsleep syz-fuzzer
67658 291060 72192 0 3 0x4000082 nanosleep syz-fuzzer
67658 279221 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 7230 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 323013 72192 0 3 0x4000082 kqread syz-fuzzer
67658 139555 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 84624 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 511567 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 508247 72192 0 3 0x4000082 thrsleep syz-fuzzer
67658 389842 72192 0 3 0x4000082 thrsleep syz-fuzzer
72192 167972 90485 0 3 0x10008a pause ksh
90485 399521 75186 0 3 0x92 select sshd
75186 339398 1 0 3 0x80 select sshd
11635 134807 20521 74 3 0x100092 bpf pflogd
20521 212028 1 0 3 0x80 netio pflogd
14318 120923 96415 73 3 0x100090 kqread syslogd
96415 15798 1 0 3 0x100082 netio syslogd
44667 434682 0 0 2 0x14200 zerothread
48099 157779 0 0 3 0x14200 aiodoned aiodoned
77680 521636 0 0 3 0x14200 syncer update
31147 520787 0 0 3 0x14200 cleaner cleaner
65611 228113 0 0 3 0x14200 reaper reaper
68374 514298 0 0 3 0x14200 pgdaemon pagedaemon
89039 371716 0 0 3 0x14200 bored crynlk
43093 361583 0 0 3 0x14200 bored crypto
98954 2749 0 0 3 0x40014200 acpi0 acpi0
95468 198404 0 0 3 0x40014200 idle1
51377 304547 0 0 3 0x14200 bored softnet
14689 350361 0 0 3 0x14200 bored systqmp
34086 104191 0 0 3 0x14200 bored systq
9864 394587 0 0 3 0x40014200 bored softclock
66707 411534 0 0 3 0x40014200 idle0
41598 374599 0 0 3 0x14200 bored smr
1 34150 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 27691 (syz-executor.0) thread 0xffff800020ab18c8 (276679)
shared rwlock vmlistlock r = 0 (0xffff80000066e478)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 vm_get_info+0x39 sys/arch/amd64/amd64/vmm.c:3712
#2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291
#3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524
#4 sys_ioctl+0x5b9
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826394e0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9619 6419K 7832K 78643K 25969 0 0
pcb 13 8K 8K 78643K 914 0 0
rtable 115 12K 13K 78643K 1101 0 0
ifaddr 88 20K 21K 78643K 772 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1710 0 0
iov 0 0K 32K 78643K 573 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1213 76K 77K 78643K 7344 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 102 0 0
VM map 2 1K 1K 78643K 10 0 0
sem 12 0K 0K 78643K 1301 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 6645 0 0
sigio 0 0K 0K 78643K 63 0 0
proc 57 51K 95K 78643K 2189 0 0
subproc 32 2K 2K 78643K 493 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 524 0 0
in_multi 33 2K 2K 78643K 499 0 0
ether_multi 1 0K 0K 78643K 33 0 0
mrt 0 0K 0K 78643K 26 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 198 874K 874K 78643K 198 0 0
exec 0 0K 1K 78643K 1057 0 0
pfkey data 0 0K 4K 78643K 2 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 114 22K 30K 78643K 23360 0 0
UVM aobj 130 5K 5K 78643K 153 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 887 0 0
NDP 21 0K 0K 78643K 240 0 0
temp 235 3557K 4197K 78643K 85113 0 0
kqueue 0 0K 0K 78643K 68 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 64 0 58 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 355 0 355 14 13 1 1 0 8 1
rtentry 112 302 0 258 2 0 2 2 0 8 0
unpcb 120 2457 0 2445 4 3 1 3 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
sackhl 24 4 0 4 4 4 0 1 0 8 0
tcpqe 32 5719 0 5719 3 3 0 2 0 8 0
tcpcb 544 1486 0 1482 3 2 1 3 0 8 0
inpcb 280 4348 0 4344 5 4 1 3 0 8 0
rttmr 72 5 0 5 5 5 0 1 0 8 0
ip6q 72 1 0 1 1 1 0 1 0 8 0
nd6 48 50 0 46 1 0 1 1 0 8 0
pkpcb 40 32 0 32 11 11 0 1 0 8 0
swfcl 56 3 0 0 1 0 1 1 0 8 0
ppxss 1128 118 0 118 19 19 0 1 0 8 0
pffrag 232 7 0 7 2 2 0 1 0 482 0
pffrnode 88 7 0 7 2 2 0 1 0 8 0
pffrent 40 19 0 19 3 3 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
pfstitem 24 161 0 153 1 0 1 1 0 8 0
pfstkey 112 162 0 154 1 0 1 1 0 8 0
pfstate 328 162 0 154 4 3 1 3 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 1331 0 1116 27 13 14 15 0 8 0
art_table 32 1332 0 1116 2 0 2 2 0 8 0
art_node 16 299 0 259 1 0 1 1 0 8 0
sysvmsgpl 40 25 0 16 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 1299 0 1289 1 0 1 1 0 8 0
shmpl 112 151 0 23 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 11459 0 10039 46 0 46 46 0 8 0
ffsino 272 11459 0 10039 95 0 95 95 0 8 0
nchpl 144 24468 0 22854 61 0 61 61 0 8 0
uvmvnodes 72 5983 0 0 109 0 109 109 0 8 0
vnodes 208 5983 0 0 315 0 315 315 0 8 0
namei 1024 78904 0 78904 8 7 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vmpool 552 8 0 8 4 4 0 1 0 8 0
scsiplug 64 17 0 17 10 10 0 1 0 8 0
scxspl 192 58388 0 58388 37 36 1 7 0 8 1
plimitpl 152 630 0 623 1 0 1 1 0 8 0
sigapl 432 6767 0 6753 3 1 2 3 0 8 0
futexpl 56 109390 0 109390 9 8 1 1 0 8 1
knotepl 112 1420 0 1401 3 2 1 2 0 8 0
kqueuepl 104 3571 0 3569 1 0 1 1 0 8 0
pipepl 112 3092 0 3073 6 5 1 2 0 8 0
fdescpl 488 6768 0 6753 3 0 3 3 0 8 0
filepl 152 53066 0 52970 24 19 5 9 0 8 1
lockfpl 104 2074 0 2074 9 8 1 1 0 8 1
lockfspl 48 727 0 727 9 8 1 1 0 8 1
sessionpl 112 48 0 39 1 0 1 1 0 8 0
pgrppl 48 103 0 94 1 0 1 1 0 8 0
ucredpl 96 8619 0 8611 1 0 1 1 0 8 0
zombiepl 144 6753 0 6753 4 3 1 1 0 8 1
processpl 896 6785 0 6753 4 0 4 4 0 8 0
procpl 632 21160 0 21117 29 24 5 5 0 8 1
srpgc 64 54 0 54 17 16 1 1 0 8 1
sosppl 128 58 0 58 18 18 0 1 0 8 0
sockpl 384 7258 0 7242 17 14 3 8 0 8 0
mcl64k 65536 19 0 0 3 0 3 3 0 8 0
mcl16k 16384 10 0 0 2 0 2 2 0 8 0
mcl12k 12288 34 0 0 3 1 2 2 0 8 0
mcl9k 9216 19 0 0 2 0 2 2 0 8 0
mcl8k 8192 30 0 0 4 2 2 3 0 8 0
mcl4k 4096 25 0 0 3 0 3 3 0 8 0
mcl2k2 2112 12 0 0 1 0 1 1 0 8 0
mcl2k 2048 278 0 0 29 7 22 29 0 8 0
mtagpl 80 58 0 0 1 0 1 1 0 8 0
mbufpl 256 433 0 0 16 0 16 16 0 8 0
bufpl 256 18980 0 11932 441 0 441 441 0 8 0
anonpl 16 619945 0 607332 191 119 72 76 0 124 11
amapchunkpl 152 41562 0 41436 20 13 7 11 0 158 0
amappl16 192 32148 0 31352 179 134 45 52 0 8 4
amappl15 184 1441 0 1439 5 4 1 1 0 8 0
amappl14 176 551 0 547 2 1 1 1 0 8 0
amappl13 168 1891 0 1891 3 3 0 1 0 8 0
amappl12 160 611 0 610 1 0 1 1 0 8 0
amappl11 152 1160 0 1152 1 0 1 1 0 8 0
amappl10 144 574 0 570 1 0 1 1 0 8 0
amappl9 136 1690 0 1682 1 0 1 1 0 8 0
amappl8 128 1202 0 1165 2 0 2 2 0 8 0
amappl7 120 739 0 730 1 0 1 1 0 8 0
amappl6 112 1103 0 1091 1 0 1 1 0 8 0
amappl5 104 965 0 954 1 0 1 1 0 8 0
amappl4 96 7358 0 7330 1 0 1 1 0 8 0
amappl3 88 913 0 908 1 0 1 1 0 8 0
amappl2 80 53724 0 53649 4 2 2 3 0 8 0
amappl1 72 157204 0 156781 25 15 10 20 0 8 0
amappl 80 21863 0 21823 3 1 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
dma64 64 259 0 259 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 17 0 17 1 1 0 1 0 8 0
aobjpl 64 152 0 23 3 0 3 3 0 8 0
uaddrrnd 24 6776 0 6753 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 6776 0 6753 1 0 1 1 0 8 0
vmmpekpl 168 54285 0 54254 2 0 2 2 0 8 0
vmmpepl 168 833944 0 831981 360 238 122 126 0 357 33
vmsppl 368 6767 0 6753 2 0 2 2 0 8 0
pdppl 4096 13559 0 13522 10 5 5 6 0 8 0
pvpl 32 1677796 0 1661973 423 246 177 182 0 265 30
pmappl 232 6775 0 6761 2 1 1 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 651 0 39 18 0 18 18 0 8 0