login: panic: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*393729 51641 0 0 0x4000000 0 syz-executor.6
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82577366) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff825ed203,ffffffff826092b5,eb,ffffffff82627890) at __assert+0x25 sys/kern/subr_prf.c:157
buf_unmap(fffffd8076d8f040) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd80691205a0) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd806770b870,24,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179
getblk(fffffd806770b870,24,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047
ffs2_balloc(fffffd800707f788,90000,4000,fffffd807f7d7888,0,ffff80002307d888) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002307d920) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346
VOP_WRITE(fffffd806770b870,ffff80002307db40,1,fffffd807f7d7888) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd806946e630,ffff80002307db40,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408
dofilewritev(ffff8000216fc000,7,ffff80002307db40,0,ffff80002307dc40) at dofilewritev+0x19c sys/kern/sys_generic.c:375
sys_writev(ffff8000216fc000,ffff80002307dbe8,ffff80002307dc40) at sys_writev+0xa7 sys/kern/sys_generic.c:322
syscall(ffff80002307dcb0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
end trace frame: 0xffff80002307dd30, count: 0
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
*cpu0: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82577366) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff825ed203,ffffffff826092b5,eb,ffffffff82627890) at __assert+0x25 sys/kern/subr_prf.c:157
buf_unmap(fffffd8076d8f040) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd80691205a0) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd806770b870,24,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179
getblk(fffffd806770b870,24,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047
ffs2_balloc(fffffd800707f788,90000,4000,fffffd807f7d7888,0,ffff80002307d888) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002307d920) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346
VOP_WRITE(fffffd806770b870,ffff80002307db40,1,fffffd807f7d7888) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd806946e630,ffff80002307db40,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408
dofilewritev(ffff8000216fc000,7,ffff80002307db40,0,ffff80002307dc40) at dofilewritev+0x19c sys/kern/sys_generic.c:375
sys_writev(ffff8000216fc000,ffff80002307dbe8,ffff80002307dc40) at sys_writev+0xa7 sys/kern/sys_generic.c:322
syscall(ffff80002307dcb0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeb5d108910, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002307d1d0
rbx 0x4000001 __kernel_phys_end+0x1400001
rdx 0
rcx 0
rax 0xffff8000216fc000
r8 0x101010101010101
r9 0x8080808080808080
r10 0x4eba7326edfcd20a
r11 0x6a18c5b6e685dfc6
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff818b1d78 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002307d1c0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.6) pid=393729 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000216fda40,0xffff8000216fca90
process=0xffff80002e8c2818 user=0xffff800023078000, vmspace=0xfffffd80723be228
estcpu=36, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
51641 180135 64215 0 2 0 syz-executor.6
*51641 393729 64215 0 7 0x4000000 syz-executor.6
51641 100235 64215 0 3 0x4000080 fsleep syz-executor.6
51641 56512 64215 0 3 0x4000080 fsleep syz-executor.6
42592 413454 3900 0 2 0 syz-executor.4
42592 23749 3900 0 3 0x4000080 netcon2 syz-executor.4
42592 419811 3900 0 3 0x4000080 netcon syz-executor.4
92755 310326 90871 0 2 0 syz-executor.1
92755 206834 90871 0 3 0x4000080 fsleep syz-executor.1
51303 479280 35947 0 2 0 syz-executor.2
51303 323505 35947 0 3 0x4000080 fsleep syz-executor.2
95625 506354 76410 0 3 0x80 nanoslp syz-executor.7
95625 362814 76410 0 3 0x4000080 kqpoll syz-executor.7
95625 450227 76410 0 3 0x4000080 fsleep syz-executor.7
88123 192852 1 0 3 0x100083 ttyin getty
64215 222272 34226 0 3 0x82 nanoslp syz-executor.6
3900 277564 34226 0 3 0x82 nanoslp syz-executor.4
18144 321343 34226 0 3 0x82 nanoslp syz-executor.5
13249 433078 34226 0 3 0x82 piperd syz-executor.3
35947 462029 34226 0 3 0x82 nanoslp syz-executor.2
90871 264111 34226 0 3 0x82 nanoslp syz-executor.1
76410 237897 34226 0 3 0x82 nanoslp syz-executor.7
15787 474906 34226 0 3 0x82 piperd syz-executor.0
87283 503612 0 0 3 0x14280 nfsidl nfsio
25610 300192 0 0 3 0x14280 nfsidl nfsio
81385 57798 0 0 3 0x14280 nfsidl nfsio
6119 56869 0 0 3 0x14280 nfsidl nfsio
80211 430149 0 0 3 0x14280 nfsidl nfsio
56768 416374 0 0 3 0x14280 nfsidl nfsio
66496 498082 0 0 3 0x14280 nfsidl nfsio
78964 411547 0 0 3 0x14280 nfsidl nfsio
80373 458638 0 0 3 0x14280 nfsidl nfsio
59029 174811 0 0 3 0x14280 nfsidl nfsio
27590 340905 0 0 3 0x14280 nfsidl nfsio
48593 56242 0 0 3 0x14280 nfsidl nfsio
14994 266739 0 0 3 0x14280 nfsidl nfsio
77143 178442 0 0 3 0x14280 nfsidl nfsio
24831 224760 0 0 3 0x14280 nfsidl nfsio
49092 147516 0 0 3 0x14280 nfsidl nfsio
47931 88053 0 0 3 0x14280 nfsidl nfsio
74391 455423 0 0 3 0x14280 nfsidl nfsio
63888 249819 0 0 3 0x14280 nfsidl nfsio
3096 458018 0 0 3 0x14280 nfsidl nfsio
76748 123494 0 0 3 0x14200 bored sosplice
34226 137942 11775 0 3 0x82 wait syz-fuzzer
34226 426155 11775 0 3 0x4000082 thrsleep syz-fuzzer
34226 445394 11775 0 3 0x4000082 thrsleep syz-fuzzer
34226 127636 11775 0 3 0x4000082 thrsleep syz-fuzzer
34226 113916 11775 0 3 0x4000082 wait syz-fuzzer
34226 459486 11775 0 3 0x4000082 wait syz-fuzzer
34226 347739 11775 0 3 0x4000082 kqread syz-fuzzer
34226 116302 11775 0 3 0x4000082 thrsleep syz-fuzzer
34226 268187 11775 0 3 0x4000082 wait syz-fuzzer
34226 195029 11775 0 3 0x4000082 wait syz-fuzzer
34226 274647 11775 0 3 0x4000082 thrsleep syz-fuzzer
34226 294405 11775 0 3 0x4000082 wait syz-fuzzer
34226 189673 11775 0 3 0x4000082 wait syz-fuzzer
34226 156562 11775 0 3 0x4000082 wait syz-fuzzer
11775 427313 53292 0 3 0x10008a sigsusp ksh
53292 332540 71220 0 3 0x9a kqread sshd
71220 117916 1 0 3 0x88 kqread sshd
86219 113966 76047 73 3 0x1100090 kqread syslogd
76047 363632 1 0 3 0x100082 netio syslogd
78497 338184 1 0 3 0x100080 kqread resolvd
75008 69356 61136 77 3 0x100092 kqread dhcpleased
3232 449838 61136 77 3 0x100092 kqread dhcpleased
61136 5948 1 0 3 0x80 kqread dhcpleased
14252 194221 0 0 3 0x14200 bored smr
12023 204032 0 0 2 0x14200 zerothread
60004 482711 0 0 3 0x14200 aiodoned aiodoned
53450 231678 0 0 3 0x14200 syncer update
69911 283426 0 0 3 0x14200 cleaner cleaner
31673 428712 0 0 3 0x14200 reaper reaper
79355 421134 0 0 3 0x14200 pgdaemon pagedaemon
23923 57861 0 0 3 0x14200 bored viomb
98171 500716 0 0 3 0x40014200 acpi0 acpi0
91444 512716 0 0 3 0x14200 bored softnet
33664 15050 0 0 3 0x14200 bored softnet
78369 97313 0 0 3 0x14200 bored softnet
23867 282646 0 0 3 0x14200 bored softnet
96974 449668 0 0 3 0x14200 bored systqmp
64225 42110 0 0 3 0x14200 bored systq
17439 315367 0 0 3 0x40014200 bored softclock
51153 265436 0 0 3 0x40014200 idle0
1 63341 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 10213 7013K 7599K 78643K 38898 0
pcb 13 20K 23K 78643K 1720 0
rtable 231 21K 22K 78643K 1655 0
ifaddr 120 27K 28K 78643K 708 0
sysctl 2 0K 0K 78643K 4 0
counters 25 17K 17K 78643K 99 0
ioctlops 0 0K 4K 78643K 3892 0
iov 1 0K 24K 78643K 1027 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1446 90K 91K 78643K 13687 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 45 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 338 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 15 53K 81K 78643K 10323 0
sigio 0 0K 0K 78643K 340 0
proc 59 59K 75K 78643K 1461 0
subproc 104 6K 7K 78643K 442 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 1029 0
in_multi 80 5K 6K 78643K 518 0
ether_multi 1 0K 0K 78643K 20 0
mrt 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 235 1049K 1049K 78643K 235 0
exec 0 0K 2K 78643K 2168 0
pfkey data 0 0K 0K 78643K 1 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 310 186K 195K 78643K 54891 0
UVM aobj 129 4K 4K 78643K 142 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 123 0
NDP 12 0K 1K 78643K 164 0
temp 129 4726K 5736K 78643K 124455 0
kqueue 12 18K 26K 78643K 513 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
rtpcb 120 580 0 577 10 7 3 3 0 8 2
rtentry 112 475 0 397 4 1 3 4 0 8 0
unpcb 144 6324 0 6309 63 57 6 6 0 8 5
syncache 296 20 0 20 5 5 0 1 0 8 0
tcpqe 32 28 0 28 2 2 0 1 0 8 0
tcpcb 768 4845 0 4799 87 78 9 17 0 8 4
arp 88 74 0 59 1 0 1 1 0 8 0
ipq 40 3 0 2 3 2 1 1 0 8 0
ipqe 40 14 0 13 3 2 1 1 0 8 0
inpcb 336 13688 0 13646 100 91 9 18 0 8 5
ip6q 72 36 0 36 2 2 0 1 0 8 0
ip6af 40 71 0 71 2 2 0 1 0 8 0
nd6 48 115 0 97 1 0 1 1 0 8 0
pkpcb 40 7 0 7 2 2 0 1 0 8 0
kcovpl 48 34 0 26 1 0 1 1 0 8 0
ppxss 1160 24 0 24 7 7 0 1 0 8 0
pfstscr 40 6 0 2 1 0 1 1 0 8 0
pfosfp 40 1565 0 1559 1 0 1 1 0 8 0
pfosfpen 112 1565 0 1495 3 0 3 3 0 8 0
pfrktable 1344 109 0 89 3 1 2 2 0 8 0
pfanchor 1280 931 714 419 44 1 43 43 0 8 0
pftag 88 11 0 6 1 0 1 1 0 8 0
pfstitem 24 5 0 0 1 0 1 1 0 8 0
pfstkey 120 9 0 7 1 0 1 1 0 8 0
pfstate 336 6 0 2 1 0 1 1 0 8 0
pfrule 1360 373 0 320 10 5 5 5 0 8 0
rttmr 136 3 0 3 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 2223 0 1856 48 22 26 30 0 8 1
art_table 32 2224 0 1856 4 0 4 4 0 8 0
art_node 16 471 0 403 1 0 1 1 0 8 0
sysvmsgpl 40 20 0 7 1 0 1 1 0 8 0
semapl 112 336 0 326 1 0 1 1 0 8 0
shmpl 112 139 0 13 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 13705 0 12251 92 0 92 92 0 8 0
ffsino 240 13705 0 12251 86 0 86 86 0 8 0
nchpl 144 28804 0 28250 63 40 23 63 0 8 0
rtmask 32 1 0 1 1 1 0 1 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 107390 0 107390 3 2 1 2 0 8 1
vcpupl 2048 75 0 5 10 0 10 10 0 8 0
vmpool 536 79 0 9 6 1 5 6 0 8 0
pfiaddrpl 120 60 0 24 3 1 2 2 0 8 0
kstatmem 264 170 0 146 2 0 2 2 0 8 0
scsiplug 72 8 0 8 2 2 0 1 0 8 0
scxspl 216 74174 0 74151 16 14 2 8 0 8 0
plimitpl 152 602 0 587 1 0 1 1 0 8 0
sigapl 424 10583 0 10519 8 0 8 8 0 8 0
futexpl 64 110233 0 110228 1 0 1 1 0 8 0
knotepl 120 110669 0 110589 22 18 4 10 0 8 0
kqueuepl 184 1337 0 1328 18 14 4 4 0 8 3
pipepl 288 1510 0 1482 33 30 3 7 0 8 0
fdescpl 432 10543 0 10517 4 0 4 4 0 8 0
filepl 120 85094 0 84816 87 73 14 18 0 8 5
lockfpl 104 1753 0 1751 3 2 1 2 0 8 0
lockfspl 48 505 0 503 1 0 1 1 0 8 0
sessionpl 144 50 0 34 1 0 1 1 0 8 0
pgrppl 48 132 0 116 1 0 1 1 0 8 0
ucredpl 104 4666 0 4654 1 0 1 1 0 8 0
zombiepl 144 10520 0 10519 1 0 1 1 0 8 0
processpl 1000 10583 0 10519 10 1 9 9 0 8 0
procpl 672 25240 0 25154 22 13 9 9 0 8 0
sosppl 168 37 0 37 5 4 1 1 0 8 1
sockpl 456 20616 0 20556 365 353 12 34 0 8 4
mcl64k 65536 216 0 216 17 16 1 1 0 8 1
mcl16k 16384 64 0 64 15 14 1 1 0 8 1
mcl12k 12288 344 0 344 13 12 1 1 0 8 1
mcl9k 9216 82 0 82 13 12 1 1 0 8 1
mcl8k 8192 319 0 319 13 12 1 1 0 8 1
mcl4k 4096 1120 0 1120 4 3 1 1 0 8 1
mcl2k2 2112 66 0 66 19 18 1 1 0 8 1
mcl2k 2048 83805 0 83746 27 16 11 12 0 8 0
mtagpl 96 692 0 605 11 7 4 8 0 8 0
mbufpl 256 395909 0 395590 891 819 72 123 0 8 32
bufpl 288 17386 0 10971 459 0 459 459 0 8 0
anonpl 24 1853873 0 1837282 201 72 129 129 0 188 23
amapchunkpl 152 157573 0 156945 58 31 27 32 0 158 0
amappl16 200 25682 0 25091 88 44 44 44 0 8 12
amappl15 192 2414 0 2412 1 0 1 1 0 8 0
amappl14 184 1465 0 1453 1 0 1 1 0 8 0
amappl13 176 558 0 555 1 0 1 1 0 8 0
amappl12 168 599 0 592 1 0 1 1 0 8 0
amappl11 160 1632 0 1617 1 0 1 1 0 8 0
amappl10 152 278 0 276 1 0 1 1 0 8 0
amappl9 144 1520 0 1517 1 0 1 1 0 8 0
amappl8 136 4658 0 4565 5 1 4 4 0 8 0
amappl7 128 3797 0 3773 1 0 1 1 0 8 0
amappl6 120 1395 0 1379 2 1 1 2 0 8 0
amappl5 112 8729 0 8719 1 0 1 1 0 8 0
amappl4 104 4263 0 4227 3 1 2 2 0 8 1
amappl3 96 29797 0 29743 2 0 2 2 0 8 0
amappl2 88 1242 0 1191 2 0 2 2 0 8 0
amappl1 80 256281 0 255551 24 7 17 21 0 8 0
amappl 88 53905 0 53734 7 2 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 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 72 141 0 13 3 0 3 3 0 8 0
uaddrrnd 24 10622 0 10526 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 10622 0 10526 1 0 1 1 0 8 0
vmmpekpl 168 71165 0 71102 4 0 4 4 0 8 0
vmmpepl 168 1008373 0 1005572 244 101 143 160 0 357 8
vmsppl 272 10621 0 10526 8 1 7 7 0 8 0
rwobjpl 24 239679 0 231914 54 5 49 49 0 8 1
pdppl 4096 21250 0 21122 515 381 134 141 0 8 6
pvpl 32 3615060 0 3593704 381 166 215 259 0 265 33
pmappl 216 10621 0 10526 7 1 6 6 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2339 0 1414 29 1 28 28 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82577366) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff825ed203,ffffffff826092b5,eb,ffffffff82627890) at __assert+0x25 sys/kern/subr_prf.c:157
buf_unmap(fffffd8076d8f040) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd80691205a0) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd806770b870,24,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179
getblk(fffffd806770b870,24,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047
ffs2_balloc(fffffd800707f788,90000,4000,fffffd807f7d7888,0,ffff80002307d888) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002307d920) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346
VOP_WRITE(fffffd806770b870,ffff80002307db40,1,fffffd807f7d7888) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd806946e630,ffff80002307db40,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408
dofilewritev(ffff8000216fc000,7,ffff80002307db40,0,ffff80002307dc40) at dofilewritev+0x19c sys/kern/sys_generic.c:375
sys_writev(ffff8000216fc000,ffff80002307dbe8,ffff80002307dc40) at sys_writev+0xa7 sys/kern/sys_generic.c:322
syscall(ffff80002307dcb0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeb5d108910, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82577366) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff825ed203,ffffffff826092b5,eb,ffffffff82627890) at __assert+0x25 sys/kern/subr_prf.c:157
buf_unmap(fffffd8076d8f040) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd80691205a0) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd806770b870,24,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179
getblk(fffffd806770b870,24,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047
ffs2_balloc(fffffd800707f788,90000,4000,fffffd807f7d7888,0,ffff80002307d888) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002307d920) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346
VOP_WRITE(fffffd806770b870,ffff80002307db40,1,fffffd807f7d7888) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd806946e630,ffff80002307db40,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408
dofilewritev(ffff8000216fc000,7,ffff80002307db40,0,ffff80002307dc40) at dofilewritev+0x19c sys/kern/sys_generic.c:375
sys_writev(ffff8000216fc000,ffff80002307dbe8,ffff80002307dc40) at sys_writev+0xa7 sys/kern/sys_generic.c:322
syscall(ffff80002307dcb0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeb5d108910, count: -15