uvm_fault: uvm_unmap_remove (3)
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syzbot
Dec 23, 2025, 8:39:23 PM (9 hours ago) Dec 23
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 2a2497efc5fa add aggr(4) to some large ramdisks which I've..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15c22022580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=558f1b874b17329300b7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ed51a5db7e23/disk-2a2497ef.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/97c3727a45c8/bsd-2a2497ef.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6eceb0c7058f/kernel-2a2497ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+558f1b...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838a83f8, 0x48, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_unmap_remove+0x426: movq 0x48(%r15),%r14
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*523770 17955 0 0x14000 0x200 0 reaper
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: 10
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: uvm_fault(0xffffffff838a83f8, 0x48, 0, 1) -> e
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
ddb> show registers
rdi 0
rsi 0
rbp 0xffff80002a763b80
rbx 0xffffffff8391e288 kernel_map_store
rdx 0
rcx 0
rax 0xffff80002a72ccf8
r8 0
r9 0x1
r10 0x16996222c634ddbd
r11 0x9d3d1be16e6d60cc
r12 0xffff800033d04000
r13 0xffff800033cfe000
r14 0
r15 0
rip 0xffffffff82e73ea6 uvm_unmap_remove+0x426
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a763af0
ss 0x10
uvm_unmap_remove+0x426: movq 0x48(%r15),%r14
ddb> show proc
PROC (reaper) tid=523770 pid=17955 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=4, usrpri=50, slppri=4, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a72ca60,0xffff80002a72cfa0
process=0xffff8000ffffd680 user=0xffff80002a75e000, vmspace=0xffffffff838a83f8
estcpu=0, cpticks=13, pctcpu=0.0, user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
52410 477097 83642 0 2 0 syz-executor
52410 370755 83642 0 3 0x4000080 msgwait syz-executor
52410 326493 83642 0 2 0x4000000 syz-executor
6568 165771 66214 0 2 0x3000 syz-executor
16426 307305 92914 0 2 0x100002 sh
92914 377252 32286 0 3 0x82 wait syz-executor
58431 102853 5699 -1 3 0x90 nanoslp syz-executor
58431 308560 5699 -1 3 0x4000090 lockf syz-executor
58431 51397 5699 -1 3 0x4000090 fsleep syz-executor
19433 470896 32286 0 3 0x82 wait syz-executor
5699 48372 32286 0 3 0x82 nanoslp syz-executor
31301 308201 0 0 3 0x14280 nfsidl nfsio
63163 7490 1 0 3 0x100083 ttyin getty
23535 438073 32286 0 3 0x82 piperd syz-executor
66214 77673 32286 0 3 0x82 nanoslp syz-executor
83642 188818 32286 0 3 0x82 nanoslp syz-executor
93099 405008 32286 0 3 0x82 wait syz-executor
85100 142702 32286 0 3 0x82 piperd syz-executor
32286 175541 88255 0 2 0x2 syz-executor
88255 477192 66857 0 3 0x10008a sigsusp ksh
66857 103919 43160 0 3 0x98 kqread sshd-session
43160 382104 38385 0 3 0x92 kqread sshd-session
38385 434344 1 0 3 0x88 kqread sshd
589 240056 58221 73 3 0x1100090 kqread syslogd
58221 137859 1 0 3 0x100082 sbwait syslogd
35377 77450 1 0 3 0x100080 kqread resolvd
34538 192957 19871 77 3 0x100092 kqread dhcpleased
962 61071 19871 77 3 0x100092 kqread dhcpleased
19871 303298 1 0 3 0x80 kqread dhcpleased
28391 495446 0 0 3 0x14200 bored smr
69491 88144 0 0 2 0x14200 zerothread
28551 228343 0 0 3 0x14200 aiodoned aiodoned
39675 394705 0 0 3 0x14200 syncer update
32398 260051 0 0 3 0x14200 cleaner cleaner
*17955 523770 0 0 7 0x14200 reaper
10690 120995 0 0 3 0x14200 pgdaemon pagedaemon
86026 309482 0 0 3 0x14200 bored viomb
97829 482604 0 0 3 0x40014200 acpi0 acpi0
49030 59188 0 0 3 0x14200 bored softnet0
63363 397576 0 0 3 0x14200 bored systqmp
54117 515829 0 0 3 0x14200 bored systq
2531 420383 0 0 3 0x40014200 tmoslp softclock
37788 59444 0 0 3 0x40014200 idle0
1 306462 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11049 12180K 13432K 166960K 15356 0
pcb 17 15K 17K 166960K 524 0
rtable 188 10K 11K 166960K 722 0
pf 33 13K 16K 166960K 155 0
ifaddr 32 5K 7K 166960K 112 0
ifgroup 50 2K 2K 166960K 177 0
sysctl 4 1K 9K 166960K 18 0
counters 33 17K 18K 166960K 100 0
ioctlops 0 0K 4K 166960K 302 0
iov 0 0K 16K 166960K 86 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1498 94K 95K 166960K 3048 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 13K 166960K 28 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 48 0
dirhash 12 2K 2K 166960K 48 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 240K 166960K 1620 0
sigio 0 0K 0K 166960K 21 0
proc 61 59K 108K 166960K 763 0
subproc 72 4K 4K 166960K 108 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 226 0
in_multi 56 4K 6K 166960K 178 0
ether_multi 1 0K 0K 166960K 11 0
mrt 1 0K 0K 166960K 13 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 623 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 4 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 219 144K 160K 166960K 15843 0
UVM aobj 71 7K 8K 166960K 76 0
pinsyscall 37 74K 94K 166960K 2815 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 81 0
NDP 11 0K 1K 166960K 75 0
temp 75 8672K 8799K 166960K 78325 0
kqueue 13 20K 31K 166960K 340 0
SYN cache 2 0K 16K 166960K 4 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 314 0 311 3 2 1 3 0 8 0
rtentry 136 189 0 127 4 0 4 4 0 8 0
unpcb 144 1486 0 1470 10 9 1 10 0 8 0
syncache 336 18 0 18 3 2 1 1 0 8 1
tcpqe 32 13 0 13 3 2 1 1 0 8 1
tcpcb 736 565 0 553 7 5 2 7 0 8 0
arp 96 29 0 18 1 0 1 1 0 8 0
ipq 40 12 0 2 1 0 1 1 0 8 0
ipqe 40 14 0 4 1 0 1 1 0 8 0
inpcb 328 1734 0 1718 7 4 3 7 0 8 0
ip6q 72 5 0 4 1 0 1 1 0 8 0
ip6af 40 9 0 8 1 0 1 1 0 8 0
nd6 112 38 0 24 1 0 1 1 0 8 0
pkpcb 40 7 0 7 2 2 0 1 0 8 0
kcovpl 48 12 0 4 1 0 1 1 0 8 0
mppekey 1024 2 0 2 1 1 0 1 0 8 0
ppxss 1072 51 0 51 1 0 1 1 0 8 1
pppxif 1384 10 0 10 2 1 1 1 0 8 1
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pfrktable 1344 6 0 3 1 0 1 1 0 8 0
pfanchor 1288 1 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 128 4 0 2 1 0 1 1 0 8 0
pfstate 384 2 0 1 1 0 1 1 0 8 0
pfrule 1344 5 0 4 1 0 1 1 0 8 0
rttmr 136 2 0 2 1 1 0 1 0 8 0
art_heap8 4096 5 0 1 5 1 4 5 0 8 0
art_heap4 256 839 0 559 26 4 22 26 0 8 0
art_table 40 844 0 560 5 0 5 5 0 8 0
art_node 32 186 0 132 1 0 1 1 0 8 0
sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 43 0 33 1 0 1 1 0 8 0
shmpl 112 71 0 4 2 0 2 2 0 8 0
dirhash 1024 41 0 24 3 0 3 3 0 8 0
dino2pl 256 4396 0 2889 95 0 95 95 0 8 0
ffsino 256 4396 0 2889 95 0 95 95 0 8 0
nchpl 144 6613 0 4910 64 0 64 64 0 8 0
rtmask 32 12 0 12 2 1 1 1 0 8 1
vnodes 216 3188 0 0 178 0 178 178 0 8 0
namei 1024 23988 0 23988 3 2 1 2 0 8 1
vcpupl 3904 2 0 1 1 0 1 1 0 8 0
vmpool 808 2 0 1 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 104 0 82 2 0 2 2 0 8 0
scsiplug 72 11 0 11 1 1 0 1 0 8 0
scxspl 216 25987 0 25987 9 7 2 8 1 8 2
plimitpl 152 363 0 346 1 0 1 1 0 8 0
sigapl 424 1888 0 1846 6 0 6 6 0 8 0
knotepl 120 336533 0 336486 46 34 12 17 0 8 8
kqueuepl 184 740 0 731 4 3 1 4 0 8 0
pipepl 304 365 0 338 8 5 3 8 0 8 0
fdescpl 448 1873 0 1845 5 1 4 5 0 8 0
filepl 120 13750 0 13536 16 6 10 16 0 8 0
lockfpl 104 967 0 962 2 1 1 2 0 8 0
lockfspl 48 203 0 199 1 0 1 1 0 8 0
sessionpl 144 38 0 30 1 0 1 1 0 8 0
pgrppl 48 62 0 46 1 0 1 1 0 8 0
ucredpl 104 2176 0 2163 1 0 1 1 0 8 0
zombiepl 144 1892 0 1889 2 1 1 1 0 8 0
processpl 1152 1888 0 1846 4 0 4 4 0 8 0
procpl 664 4047 0 4000 6 0 6 6 0 8 0
sosppl 176 12 0 10 1 0 1 1 0 8 0
sockpl 552 3590 0 3555 21 17 4 20 0 8 0
mcl64k 65536 135 0 135 1 0 1 1 0 8 1
mcl9k 9216 2 0 2 1 1 0 1 0 8 0
mcl8k 8192 18 0 18 2 2 0 1 0 8 0
mcl4k 4096 4363 0 4306 18 9 9 17 0 8 1
mcl2k 2048 2570 0 2563 5 3 2 5 0 8 0
mtagpl 96 172 0 85 4 0 4 4 0 8 0
mbufpl 256 21336 0 21112 97 79 18 78 0 8 0
bufpl 280 8909 0 2688 445 0 445 445 0 8 0
anonpl 24 263487 0 255315 108 33 75 75 0 187 0
amapchunkpl 152 53762 0 53255 56 21 35 40 0 158 12
amappl16 200 4524 0 4265 68 42 26 26 0 8 0
amappl15 192 53 0 52 1 0 1 1 0 8 0
amappl14 184 5 0 5 1 1 0 1 0 8 0
amappl13 176 455 0 453 1 0 1 1 0 8 0
amappl12 168 2266 0 2229 2 0 2 2 0 8 0
amappl11 160 3 0 3 1 1 0 1 0 8 0
amappl10 152 40 0 29 1 0 1 1 0 8 0
amappl9 144 261 0 261 1 1 0 1 0 8 0
amappl8 136 16 0 14 1 0 1 1 0 8 0
amappl7 128 88 0 86 1 0 1 1 0 8 0
amappl6 120 311 0 298 1 0 1 1 0 8 0
amappl5 112 79 0 71 1 0 1 1 0 8 0
amappl4 104 450 0 426 1 0 1 1 0 8 0
amappl3 96 10732 0 10639 4 0 4 4 0 8 0
amappl2 88 646 0 590 2 0 2 2 0 8 0
amappl1 80 18480 0 17949 15 2 13 15 0 8 0
amappl 88 14768 0 14618 6 1 5 5 0 92 0
uvmvnodes 80 141 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 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 128 260 0 260 1 1 0 1 0 8 0
dma64 64 7 0 7 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 75 0 5 2 0 2 2 0 8 0
uaddrrnd 24 1873 0 1845 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1873 0 1845 1 0 1 1 0 8 0
vmmpekpl 168 16444 0 16406 3 0 3 3 0 8 0
vmmpekpl: pool(0xffffffff839800b8:vmmpekpl): page inconsistency: page 0x0; at page head addr 0xfffffd80681ecf90 (p 0xfffffd80681ec000)
vmmpepl 168 125046 0 123101 117 16 101 101 0 357 1
vmsppl 368 1872 0 1845 4 1 3 4 0 8 0
rwobjpl 40 33563 0 32286 17 1 16 16 0 8 0
pdppl 4096 3756 0 3693 124 55 69 82 0 8 6
pvpl 32 803698 0 790130 204 55 149 149 0 265 6
pmappl 216 1874 0 1846 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 499 0 168 12 0 12 12 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
ddb> machine ddbcpu 1
No such command
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
---
This report is generated by a bot. It may contain errors.
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 2a2497efc5fa add aggr(4) to some large ramdisks which I've..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15c22022580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=558f1b874b17329300b7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ed51a5db7e23/disk-2a2497ef.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/97c3727a45c8/bsd-2a2497ef.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6eceb0c7058f/kernel-2a2497ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+558f1b...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838a83f8, 0x48, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_unmap_remove+0x426: movq 0x48(%r15),%r14
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*523770 17955 0 0x14000 0x200 0 reaper
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: 10
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: uvm_fault(0xffffffff838a83f8, 0x48, 0, 1) -> e
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
ddb> show registers
rdi 0
rsi 0
rbp 0xffff80002a763b80
rbx 0xffffffff8391e288 kernel_map_store
rdx 0
rcx 0
rax 0xffff80002a72ccf8
r8 0
r9 0x1
r10 0x16996222c634ddbd
r11 0x9d3d1be16e6d60cc
r12 0xffff800033d04000
r13 0xffff800033cfe000
r14 0
r15 0
rip 0xffffffff82e73ea6 uvm_unmap_remove+0x426
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a763af0
ss 0x10
uvm_unmap_remove+0x426: movq 0x48(%r15),%r14
ddb> show proc
PROC (reaper) tid=523770 pid=17955 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=4, usrpri=50, slppri=4, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a72ca60,0xffff80002a72cfa0
process=0xffff8000ffffd680 user=0xffff80002a75e000, vmspace=0xffffffff838a83f8
estcpu=0, cpticks=13, pctcpu=0.0, user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
52410 477097 83642 0 2 0 syz-executor
52410 370755 83642 0 3 0x4000080 msgwait syz-executor
52410 326493 83642 0 2 0x4000000 syz-executor
6568 165771 66214 0 2 0x3000 syz-executor
16426 307305 92914 0 2 0x100002 sh
92914 377252 32286 0 3 0x82 wait syz-executor
58431 102853 5699 -1 3 0x90 nanoslp syz-executor
58431 308560 5699 -1 3 0x4000090 lockf syz-executor
58431 51397 5699 -1 3 0x4000090 fsleep syz-executor
19433 470896 32286 0 3 0x82 wait syz-executor
5699 48372 32286 0 3 0x82 nanoslp syz-executor
31301 308201 0 0 3 0x14280 nfsidl nfsio
63163 7490 1 0 3 0x100083 ttyin getty
23535 438073 32286 0 3 0x82 piperd syz-executor
66214 77673 32286 0 3 0x82 nanoslp syz-executor
83642 188818 32286 0 3 0x82 nanoslp syz-executor
93099 405008 32286 0 3 0x82 wait syz-executor
85100 142702 32286 0 3 0x82 piperd syz-executor
32286 175541 88255 0 2 0x2 syz-executor
88255 477192 66857 0 3 0x10008a sigsusp ksh
66857 103919 43160 0 3 0x98 kqread sshd-session
43160 382104 38385 0 3 0x92 kqread sshd-session
38385 434344 1 0 3 0x88 kqread sshd
589 240056 58221 73 3 0x1100090 kqread syslogd
58221 137859 1 0 3 0x100082 sbwait syslogd
35377 77450 1 0 3 0x100080 kqread resolvd
34538 192957 19871 77 3 0x100092 kqread dhcpleased
962 61071 19871 77 3 0x100092 kqread dhcpleased
19871 303298 1 0 3 0x80 kqread dhcpleased
28391 495446 0 0 3 0x14200 bored smr
69491 88144 0 0 2 0x14200 zerothread
28551 228343 0 0 3 0x14200 aiodoned aiodoned
39675 394705 0 0 3 0x14200 syncer update
32398 260051 0 0 3 0x14200 cleaner cleaner
*17955 523770 0 0 7 0x14200 reaper
10690 120995 0 0 3 0x14200 pgdaemon pagedaemon
86026 309482 0 0 3 0x14200 bored viomb
97829 482604 0 0 3 0x40014200 acpi0 acpi0
49030 59188 0 0 3 0x14200 bored softnet0
63363 397576 0 0 3 0x14200 bored systqmp
54117 515829 0 0 3 0x14200 bored systq
2531 420383 0 0 3 0x40014200 tmoslp softclock
37788 59444 0 0 3 0x40014200 idle0
1 306462 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11049 12180K 13432K 166960K 15356 0
pcb 17 15K 17K 166960K 524 0
rtable 188 10K 11K 166960K 722 0
pf 33 13K 16K 166960K 155 0
ifaddr 32 5K 7K 166960K 112 0
ifgroup 50 2K 2K 166960K 177 0
sysctl 4 1K 9K 166960K 18 0
counters 33 17K 18K 166960K 100 0
ioctlops 0 0K 4K 166960K 302 0
iov 0 0K 16K 166960K 86 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1498 94K 95K 166960K 3048 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 13K 166960K 28 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 48 0
dirhash 12 2K 2K 166960K 48 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 240K 166960K 1620 0
sigio 0 0K 0K 166960K 21 0
proc 61 59K 108K 166960K 763 0
subproc 72 4K 4K 166960K 108 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 226 0
in_multi 56 4K 6K 166960K 178 0
ether_multi 1 0K 0K 166960K 11 0
mrt 1 0K 0K 166960K 13 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 623 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 4 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 219 144K 160K 166960K 15843 0
UVM aobj 71 7K 8K 166960K 76 0
pinsyscall 37 74K 94K 166960K 2815 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 81 0
NDP 11 0K 1K 166960K 75 0
temp 75 8672K 8799K 166960K 78325 0
kqueue 13 20K 31K 166960K 340 0
SYN cache 2 0K 16K 166960K 4 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 314 0 311 3 2 1 3 0 8 0
rtentry 136 189 0 127 4 0 4 4 0 8 0
unpcb 144 1486 0 1470 10 9 1 10 0 8 0
syncache 336 18 0 18 3 2 1 1 0 8 1
tcpqe 32 13 0 13 3 2 1 1 0 8 1
tcpcb 736 565 0 553 7 5 2 7 0 8 0
arp 96 29 0 18 1 0 1 1 0 8 0
ipq 40 12 0 2 1 0 1 1 0 8 0
ipqe 40 14 0 4 1 0 1 1 0 8 0
inpcb 328 1734 0 1718 7 4 3 7 0 8 0
ip6q 72 5 0 4 1 0 1 1 0 8 0
ip6af 40 9 0 8 1 0 1 1 0 8 0
nd6 112 38 0 24 1 0 1 1 0 8 0
pkpcb 40 7 0 7 2 2 0 1 0 8 0
kcovpl 48 12 0 4 1 0 1 1 0 8 0
mppekey 1024 2 0 2 1 1 0 1 0 8 0
ppxss 1072 51 0 51 1 0 1 1 0 8 1
pppxif 1384 10 0 10 2 1 1 1 0 8 1
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pfrktable 1344 6 0 3 1 0 1 1 0 8 0
pfanchor 1288 1 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 128 4 0 2 1 0 1 1 0 8 0
pfstate 384 2 0 1 1 0 1 1 0 8 0
pfrule 1344 5 0 4 1 0 1 1 0 8 0
rttmr 136 2 0 2 1 1 0 1 0 8 0
art_heap8 4096 5 0 1 5 1 4 5 0 8 0
art_heap4 256 839 0 559 26 4 22 26 0 8 0
art_table 40 844 0 560 5 0 5 5 0 8 0
art_node 32 186 0 132 1 0 1 1 0 8 0
sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 43 0 33 1 0 1 1 0 8 0
shmpl 112 71 0 4 2 0 2 2 0 8 0
dirhash 1024 41 0 24 3 0 3 3 0 8 0
dino2pl 256 4396 0 2889 95 0 95 95 0 8 0
ffsino 256 4396 0 2889 95 0 95 95 0 8 0
nchpl 144 6613 0 4910 64 0 64 64 0 8 0
rtmask 32 12 0 12 2 1 1 1 0 8 1
vnodes 216 3188 0 0 178 0 178 178 0 8 0
namei 1024 23988 0 23988 3 2 1 2 0 8 1
vcpupl 3904 2 0 1 1 0 1 1 0 8 0
vmpool 808 2 0 1 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 104 0 82 2 0 2 2 0 8 0
scsiplug 72 11 0 11 1 1 0 1 0 8 0
scxspl 216 25987 0 25987 9 7 2 8 1 8 2
plimitpl 152 363 0 346 1 0 1 1 0 8 0
sigapl 424 1888 0 1846 6 0 6 6 0 8 0
knotepl 120 336533 0 336486 46 34 12 17 0 8 8
kqueuepl 184 740 0 731 4 3 1 4 0 8 0
pipepl 304 365 0 338 8 5 3 8 0 8 0
fdescpl 448 1873 0 1845 5 1 4 5 0 8 0
filepl 120 13750 0 13536 16 6 10 16 0 8 0
lockfpl 104 967 0 962 2 1 1 2 0 8 0
lockfspl 48 203 0 199 1 0 1 1 0 8 0
sessionpl 144 38 0 30 1 0 1 1 0 8 0
pgrppl 48 62 0 46 1 0 1 1 0 8 0
ucredpl 104 2176 0 2163 1 0 1 1 0 8 0
zombiepl 144 1892 0 1889 2 1 1 1 0 8 0
processpl 1152 1888 0 1846 4 0 4 4 0 8 0
procpl 664 4047 0 4000 6 0 6 6 0 8 0
sosppl 176 12 0 10 1 0 1 1 0 8 0
sockpl 552 3590 0 3555 21 17 4 20 0 8 0
mcl64k 65536 135 0 135 1 0 1 1 0 8 1
mcl9k 9216 2 0 2 1 1 0 1 0 8 0
mcl8k 8192 18 0 18 2 2 0 1 0 8 0
mcl4k 4096 4363 0 4306 18 9 9 17 0 8 1
mcl2k 2048 2570 0 2563 5 3 2 5 0 8 0
mtagpl 96 172 0 85 4 0 4 4 0 8 0
mbufpl 256 21336 0 21112 97 79 18 78 0 8 0
bufpl 280 8909 0 2688 445 0 445 445 0 8 0
anonpl 24 263487 0 255315 108 33 75 75 0 187 0
amapchunkpl 152 53762 0 53255 56 21 35 40 0 158 12
amappl16 200 4524 0 4265 68 42 26 26 0 8 0
amappl15 192 53 0 52 1 0 1 1 0 8 0
amappl14 184 5 0 5 1 1 0 1 0 8 0
amappl13 176 455 0 453 1 0 1 1 0 8 0
amappl12 168 2266 0 2229 2 0 2 2 0 8 0
amappl11 160 3 0 3 1 1 0 1 0 8 0
amappl10 152 40 0 29 1 0 1 1 0 8 0
amappl9 144 261 0 261 1 1 0 1 0 8 0
amappl8 136 16 0 14 1 0 1 1 0 8 0
amappl7 128 88 0 86 1 0 1 1 0 8 0
amappl6 120 311 0 298 1 0 1 1 0 8 0
amappl5 112 79 0 71 1 0 1 1 0 8 0
amappl4 104 450 0 426 1 0 1 1 0 8 0
amappl3 96 10732 0 10639 4 0 4 4 0 8 0
amappl2 88 646 0 590 2 0 2 2 0 8 0
amappl1 80 18480 0 17949 15 2 13 15 0 8 0
amappl 88 14768 0 14618 6 1 5 5 0 92 0
uvmvnodes 80 141 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 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 128 260 0 260 1 1 0 1 0 8 0
dma64 64 7 0 7 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 75 0 5 2 0 2 2 0 8 0
uaddrrnd 24 1873 0 1845 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1873 0 1845 1 0 1 1 0 8 0
vmmpekpl 168 16444 0 16406 3 0 3 3 0 8 0
vmmpekpl: pool(0xffffffff839800b8:vmmpekpl): page inconsistency: page 0x0; at page head addr 0xfffffd80681ecf90 (p 0xfffffd80681ec000)
vmmpepl 168 125046 0 123101 117 16 101 101 0 357 1
vmsppl 368 1872 0 1845 4 1 3 4 0 8 0
rwobjpl 40 33563 0 32286 17 1 16 16 0 8 0
pdppl 4096 3756 0 3693 124 55 69 82 0 8 6
pvpl 32 803698 0 790130 204 55 149 149 0 265 6
pmappl 216 1874 0 1846 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 499 0 168 12 0 12 12 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
ddb> machine ddbcpu 1
No such command
ddb> trace
uvm_unmap_remove(ffffffff8391e288,ffff800033cfe000,ffff800033d04000,ffff80002a763b98,0,1,486591a487765a35) at uvm_unmap_remove+0x426 sys/uvm/uvm_map.c:1969
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff8391e288,ffff800033cfe000,ffff800033d04000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793
km_free(ffff800033cfe000,6000,ffffffff83491068,ffffffff835724f8) at km_free+0x87 sys/uvm/uvm_km.c:714
uvm_uarea_free(ffff80002a776f98) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
reaper(ffff80002a72ccf8) at reaper+0x1a9 sys/kern/kern_exit.c:493
end trace frame: 0x0, count: -5
---
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