panic: malloc: allocation too large, type = 2, sipzaen i= c1:84 4k6er74n4e0l7 3di70ag9n55os1t296ic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*314997 10047 0 0 0x4000000 1 syz-executor.0
283774 45263 0 0 0x4000000 0 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
__assert(ffffffff821ff1b8,ffffffff821ebffe,2b2,ffffffff821d067d) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 11
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
malloc: allocation too large, type = 2, size = 18446744073709551296
ddb{1}> 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
__assert(ffffffff821ff1b8,ffffffff821ebffe,2b2,ffffffff821d067d) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000219635f0
rbx 0xffff8000219636a0
rdx 0xffff800020acfb50
rcx 0
rax 0
r8 0xffffffff81e023df kprintf+0x16f
r9 0x1
r10 0x25
r11 0xf1abba7f451445f8
r12 0x3000000008
r13 0xffff800021963600
r14 0x104
r15 0x1
rip 0xffffffff818a6868 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000219635e0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=314997 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=83, usrpri=83, nice=20
forw=0xffffffffffffffff, list=0xffff800020acea08,0xffffffff8263bd20
process=0xffff800020adc380 user=0xffff80002195e000, vmspace=0xfffffd807f00b5c0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
10047 325996 74726 0 2 0 syz-executor.0
*10047 314997 74726 0 7 0x4000000 syz-executor.0
45263 52823 57292 0 2 0 syz-executor.1
45263 283774 57292 0 7 0x4000000 syz-executor.1
45263 353509 57292 0 2 0x4000000 syz-executor.1
57292 356561 93900 0 3 0x82 nanosleep syz-executor.1
74726 178180 93900 0 3 0x82 nanosleep syz-executor.0
28538 495096 0 0 3 0x14200 acct acct
99823 381999 1 0 3 0x100083 ttyin getty
46553 378865 0 0 3 0x14200 bored sosplice
93900 157853 33828 0 3 0x82 thrsleep syz-fuzzer
93900 201340 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 63922 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 229225 33828 0 3 0x4000082 kqread syz-fuzzer
93900 492294 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 137308 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 210093 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 36782 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 350513 33828 0 3 0x4000082 thrsleep syz-fuzzer
93900 519574 33828 0 3 0x4000082 thrsleep syz-fuzzer
33828 108793 66953 0 3 0x10008a pause ksh
66953 324959 21123 0 3 0x92 select sshd
21123 327583 1 0 3 0x80 select sshd
39535 269029 10495 74 3 0x100092 bpf pflogd
10495 135404 1 0 3 0x80 netio pflogd
58238 27302 12640 73 3 0x100090 kqread syslogd
12640 201840 1 0 3 0x100082 netio syslogd
41175 417576 1 77 3 0x100090 poll dhclient
78361 446838 1 0 3 0x80 poll dhclient
97196 454655 0 0 2 0x14200 zerothread
48275 399155 0 0 3 0x14200 aiodoned aiodoned
21145 332933 0 0 3 0x14200 syncer update
46415 81495 0 0 3 0x14200 cleaner cleaner
37262 450684 0 0 3 0x14200 reaper reaper
29413 500136 0 0 3 0x14200 pgdaemon pagedaemon
26599 234413 0 0 3 0x14200 bored crynlk
24007 140216 0 0 3 0x14200 bored crypto
94173 14517 0 0 3 0x40014200 acpi0 acpi0
12022 395778 0 0 3 0x40014200 idle1
91743 21052 0 0 3 0x14200 bored softnet
72556 431120 0 0 3 0x14200 bored systqmp
352 97554 0 0 3 0x14200 bored systq
55611 371648 0 0 3 0x40014200 bored softclock
30592 456609 0 0 3 0x40014200 idle0
31432 143094 0 0 3 0x14200 bored smr
1 294556 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 45263 (syz-executor.1) thread 0xffff800020aceef8 (283774)
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{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9525 7074K 7588K 78643K 12906 0 0
pcb 13 8K 8K 78643K 165 0 0
rtable 108 4K 4K 78643K 564 0 0
ifaddr 59 13K 14K 78643K 189 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1639 0 0
iov 0 0K 24K 78643K 1466 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1217 76K 77K 78643K 2074 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 30 0 0
VM map 2 1K 1K 78643K 4 0 0
sem 12 0K 1K 78643K 2294 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 2263 0 0
sigio 0 0K 0K 78643K 4 0 0
proc 61 63K 83K 78643K 996 0 0
subproc 32 2K 2K 78643K 102 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 71 0 0
in_multi 33 2K 2K 78643K 113 0 0
ether_multi 1 0K 0K 78643K 9 0 0
mrt 0 0K 0K 78643K 3 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 72 318K 318K 78643K 72 0 0
exec 0 0K 1K 78643K 337 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 101 21K 30K 78643K 7617 0 0
UVM aobj 130 6K 6K 78643K 140 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 141 0 0
NDP 12 0K 0K 78643K 57 0 0
temp 172 3555K 4194K 78643K 22883 0 0
kqueue 0 0K 0K 78643K 6 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 15 0 9 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 85 0 83 1 0 1 1 0 8 0
rtentry 112 86 0 42 2 0 2 2 0 8 0
unpcb 120 1846 0 1836 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 5053 0 5053 1 1 0 1 0 8 0
tcpcb 544 196 0 192 1 0 1 1 0 8 0
inpcb 280 637 0 630 2 1 1 2 0 8 0
nd6 48 12 0 8 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 2 0 1 0 8 0
ppxss 1128 17 0 17 4 4 0 1 0 8 0
pffrag 232 3 0 3 2 2 0 1 0 482 0
pffrnode 88 3 0 3 2 2 0 1 0 8 0
pffrent 40 8 0 8 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 51 0 47 1 0 1 1 0 8 0
pfstkey 112 51 0 47 1 0 1 1 0 8 0
pfstate 328 51 0 47 3 2 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 256 391 0 173 14 0 14 14 0 8 0
art_table 32 392 0 173 2 0 2 2 0 8 0
art_node 16 85 0 45 1 0 1 1 0 8 0
sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 2292 0 2282 1 0 1 1 0 8 0
shmpl 112 138 0 10 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 4715 0 3277 47 0 47 47 0 8 0
ffsino 272 4715 0 3277 97 0 97 97 0 8 0
nchpl 144 9097 0 7486 61 0 61 61 0 8 0
uvmvnodes 72 5382 0 0 98 0 98 98 0 8 0
vnodes 208 5382 0 0 284 0 284 284 0 8 0
namei 1024 32062 0 32062 2 1 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vmpool 552 2 0 2 1 1 0 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 29813 0 29813 20 19 1 7 0 8 1
plimitpl 152 97 0 89 1 0 1 1 0 8 0
sigapl 432 2452 0 2436 3 1 2 3 0 8 0
futexpl 56 48832 0 48832 1 0 1 1 0 8 1
knotepl 112 443 0 424 6 4 2 3 0 8 1
kqueuepl 104 349 0 346 1 0 1 1 0 8 0
pipepl 112 1010 0 987 5 4 1 2 0 8 0
fdescpl 488 2453 0 2436 3 0 3 3 0 8 0
filepl 152 19045 0 18931 10 5 5 6 0 8 0
lockfpl 104 2734 0 2728 1 0 1 1 0 8 0
lockfspl 48 567 0 564 1 0 1 1 0 8 0
sessionpl 112 23 0 12 1 0 1 1 0 8 0
pgrppl 48 41 0 30 1 0 1 1 0 8 0
ucredpl 96 4987 0 4977 1 0 1 1 0 8 0
zombiepl 144 2436 0 2436 2 1 1 1 0 8 1
processpl 896 2470 0 2436 4 0 4 4 0 8 0
procpl 632 6514 0 6468 6 1 5 5 0 8 0
srpgc 64 8 0 8 4 4 0 1 0 8 0
sosppl 128 14 0 14 5 5 0 1 0 8 0
sockpl 384 2582 0 2563 11 8 3 4 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 5 0 0 1 0 1 1 0 8 0
mcl12k 12288 8 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 144 0 0 16 0 16 16 0 8 0
mtagpl 80 19 0 0 1 0 1 1 0 8 0
mbufpl 256 261 0 0 9 0 9 9 0 8 0
bufpl 256 11386 0 4338 441 0 441 441 0 8 0
anonpl 16 504392 0 488206 125 59 66 89 0 124 0
amapchunkpl 152 13206 0 13082 15 9 6 10 0 158 0
amappl16 192 28664 0 27652 113 62 51 63 0 8 0
amappl15 184 3 0 2 1 0 1 1 0 8 0
amappl14 176 1174 0 1170 1 0 1 1 0 8 0
amappl13 168 508 0 507 1 0 1 1 0 8 0
amappl12 160 174 0 174 2 2 0 1 0 8 0
amappl11 152 66 0 51 1 0 1 1 0 8 0
amappl10 144 22 0 18 1 0 1 1 0 8 0
amappl9 136 1046 0 1038 1 0 1 1 0 8 0
amappl8 128 576 0 552 1 0 1 1 0 8 0
amappl7 120 57 0 51 1 0 1 1 0 8 0
amappl6 112 82 0 70 1 0 1 1 0 8 0
amappl5 104 341 0 327 1 0 1 1 0 8 0
amappl4 96 1602 0 1569 1 0 1 1 0 8 0
amappl3 88 2414 0 2405 1 0 1 1 0 8 0
amappl2 80 18942 0 18862 3 1 2 3 0 8 0
amappl1 72 61259 0 60808 25 15 10 20 0 8 0
amappl 80 6898 0 6859 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
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 64 139 0 10 3 0 3 3 0 8 0
uaddrrnd 24 2455 0 2436 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2455 0 2436 1 0 1 1 0 8 0
vmmpekpl 168 18771 0 18734 2 0 2 2 0 8 0
vmmpepl 168 317167 0 314926 210 112 98 110 0 357 0
vmsppl 368 2452 0 2436 2 0 2 2 0 8 0
pdppl 4096 4917 0 4876 7 1 6 6 0 8 0
pvpl 32 1198782 0 1178727 276 114 162 213 0 265 0
pmappl 232 2454 0 2438 2 1 1 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 603 0 5 18 0 18 18 0 8 0