witness: reversal: &cq->cq_mtx &sched_lock
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syzbot
Apr 21, 2025, 11:22:28 PM4/21/25
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: e8eeea37c7e6 Return EPERM if uvm_map_immutable hits a MAP_..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12af6c70580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=8f5c1beabd11c2de64bb
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f157aac6cca5/disk-e8eeea37.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/47933417a14f/bsd-e8eeea37.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bd7534f4b057/kernel-e8eeea37.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8f5c1b...@syzkaller.appspotmail.com
witness: lock order reversal:
1st 0xffffffff83829df8 &cq->cq_mtx (&cq->cq_mtx)
2nd 0xffffffff838eec28 &sched_lock (&sched_lock)
lock order [1] &cq->cq_mtx (&cq->cq_mtx) -> [2] &sched_lock (&sched_lock)
#0 mtx_enter+0x47 sys/kern/kern_lock.c:238
#1 sleep_setup+0xc6 sys/kern/kern_synch.c:348
#2 msleep+0x114 sys/kern/kern_synch.c:245
#3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
#4 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
#4 dtclose+0x105 sys/dev/dt/dt_dev.c:232
#5 spec_close+0x45f sys/kern/spec_vnops.c:-1
#6 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
#7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#8 fdrop+0x126 sys/kern/kern_descrip.c:1265
#9 closef+0x192 sys/kern/kern_descrip.c:1249
#10 fdfree+0x116 sys/kern/kern_descrip.c:1181
#11 exit1+0x58f sys/kern/kern_exit.c:214
#12 sys_exit+0x1a sys/kern/kern_exit.c:-1
#13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
lock order [2] &sched_lock (&sched_lock) -> [1] &cq->cq_mtx (&cq->cq_mtx)
#0 mtx_enter+0x47 sys/kern/kern_lock.c:238
#1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323
#2 mi_switch+0x165 x86_atomic_clearbits_u32 machine/atomic.h:-1 [inline]
#2 mi_switch+0x165 sys/kern/sched_bsd.c:371
#3 sleep_finish+0x24f sys/kern/kern_synch.c:412
#4 rwsleep+0xf2 sys/kern/kern_synch.c:298
#5 futex_wait+0x372 sys/kern/sys_futex.c:250
#6 sys_futex+0x149 sys/kern/sys_futex.c:101
#7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#8 Xsyscall+0x128
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff838eec28,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
mtx_enter(ffffffff838eec18) at mtx_enter+0x47 sys/kern/kern_lock.c:238
sleep_setup(ffffffff83829e48,220,ffffffff83399e6d) at sleep_setup+0xc6 sys/kern/kern_synch.c:348
msleep(ffffffff83829e48,ffffffff83829de8,220,ffffffff83399e6d,0) at msleep+0x114 sys/kern/kern_synch.c:245
dt_ioctl_record_stop(ffff80000146d000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002f7d6790) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805d402878,81,fffffd807f7d3138,ffff80003c468d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806be189b0,ffff80003c468d08) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd806be189b0,ffff80003c468d08) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80003c468d08) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80003c468d08,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80003c468d08,ffff80002f7d6b00,ffff80002f7d6a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002f7d6b00) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002f7d6b00) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6fab7c8a6560, count: -17
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002f7d64a0
rbx 0xfffffd8004738c48
rdx 0
rcx 0xffff80003c468d08
rax 0xffff8000299ddff0
r8 0xffff80002f7d6380
r9 0x8080808080808080
r10 0x17317a6c5f8b6cb0
r11 0x2587842f6385fd26
r12 0
r13 0xfffffd8003f48340
r14 0x3
r15 0xffffffff
rip 0xffffffff8224c1f5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002f7d6490
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=112427 pid=11540 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80003c468d08 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c43b740,0xffff80003c469c78
process=0xffff80003c4a12c8 user=0xffff80002f7d1000, vmspace=0xfffffd806bece018
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
93029 231135 33289 0 7 0 syz-executor
93029 128391 33289 0 2 0x4000000 syz-executor
85774 104267 82866 -1 3 0x90 nanoslp syz-executor
85774 461876 82866 -1 3 0x4000090 lockf syz-executor
85774 17008 82866 -1 3 0x4000090 ttyretype syz-executor
85774 76914 82866 -1 3 0x4000090 fsleep syz-executor
43105 296196 95900 0 3 0x80 nanoslp syz-executor
43105 283006 95900 0 3 0x4000080 sbwait syz-executor
43105 468604 95900 0 3 0x4000080 fsleep syz-executor
37939 409355 8291 0 3 0x80 nanoslp syz-executor
37939 3005 8291 0 3 0x4000080 lockf syz-executor
37939 451246 8291 0 3 0x4000080 fsleep syz-executor
95975 264455 11624 0 3 0x80 nanoslp syz-executor
95975 346282 11624 0 3 0x4000080 ttyout syz-executor
95975 141223 11624 0 3 0x4000080 fsleep syz-executor
73328 263465 34245 60929 3 0x90 nanoslp syz-executor
73328 456597 34245 60929 3 0x4000090 ttyin syz-executor
73328 97957 34245 60929 3 0x4000090 fsleep syz-executor
8291 289568 47418 0 3 0x82 nanoslp syz-executor
11624 279218 47418 0 3 0x82 nanoslp syz-executor
15355 208020 1 0 3 0x100083 ttyin getty
12753 230276 0 0 3 0x14280 nfsidl nfsio
45780 390283 0 0 3 0x14280 nfsidl nfsio
54151 368768 0 0 3 0x14280 nfsidl nfsio
34864 75353 0 0 3 0x14280 nfsidl nfsio
78768 118328 0 0 3 0x14280 nfsidl nfsio
84069 518516 0 0 3 0x14280 nfsidl nfsio
97149 111121 0 0 3 0x14280 nfsidl nfsio
38074 438790 0 0 3 0x14280 nfsidl nfsio
93903 52968 0 0 3 0x14280 nfsidl nfsio
96958 355150 0 0 3 0x14280 nfsidl nfsio
47831 412502 0 0 3 0x14280 nfsidl nfsio
42676 258424 0 0 3 0x14280 nfsidl nfsio
68647 506769 0 0 3 0x14280 nfsidl nfsio
2465 313745 0 0 3 0x14280 nfsidl nfsio
57125 199308 0 0 3 0x14280 nfsidl nfsio
78428 294914 0 0 3 0x14280 nfsidl nfsio
61913 409268 0 0 3 0x14280 nfsidl nfsio
40962 54827 0 0 3 0x14280 nfsidl nfsio
92247 321513 0 0 3 0x14280 nfsidl nfsio
65434 249928 0 0 3 0x14280 nfsidl nfsio
40347 276163 47418 0 3 0x82 nanoslp syz-executor
49790 310151 0 0 3 0x14200 bored sosplice
34245 457191 47418 0 3 0x82 nanoslp syz-executor
82866 23169 47418 0 3 0x82 nanoslp syz-executor
74804 222465 47418 0 3 0x82 wait syz-executor
95900 462073 47418 0 3 0x82 nanoslp syz-executor
33289 72637 47418 0 3 0x82 nanoslp syz-executor
47418 98022 38446 0 3 0x82 kqread syz-executor
38446 271984 75097 0 3 0x10008a sigsusp ksh
75097 424587 96488 0 3 0x98 kqread sshd-session
96488 522818 3091 0 3 0x92 kqread sshd-session
3091 422368 1 0 3 0x88 kqread sshd
77513 233509 96052 74 3 0x1100092 bpf pflogd
96052 484283 1 0 3 0x80 sbwait pflogd
74737 176012 91272 73 3 0x1100090 kqread syslogd
91272 439502 1 0 3 0x100082 sbwait syslogd
89852 523226 1 0 3 0x100080 kqread resolvd
72797 96231 87001 77 3 0x100092 kqread dhcpleased
90150 408546 87001 77 3 0x100092 kqread dhcpleased
87001 450389 1 0 3 0x80 kqread dhcpleased
4468 1501 0 0 3 0x14200 bored smr
57868 152479 0 0 3 0x14200 pgzero zerothread
56185 39639 0 0 3 0x14200 aiodoned aiodoned
87728 494331 0 0 3 0x14200 syncer update
28772 101145 0 0 3 0x14200 cleaner cleaner
79624 215608 0 0 3 0x14200 reaper reaper
54594 445620 0 0 3 0x14200 pgdaemon pagedaemon
79435 313387 0 0 3 0x14200 bored viomb
12856 119324 0 0 3 0x40014200 acpi0 acpi0
88850 32513 0 0 3 0x40014200 idle1
99373 121305 0 0 3 0x14200 bored softnet3
87498 69956 0 0 3 0x14200 bored softnet2
74295 290753 0 0 3 0x14200 bored softnet1
76364 501558 0 0 3 0x14200 bored softnet0
83537 237041 0 0 3 0x14200 bored systqmp
9965 408687 0 0 3 0x14200 bored systq
71509 185238 0 0 3 0x14200 tmoslp softclockmp
82917 502259 0 0 3 0x40014200 tmoslp softclock
13325 5982 0 0 3 0x40014200 idle0
1 207150 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &cq->cq_mtx r = 0 (0xffffffff83829df8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
#4 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
#5 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
#5 dtclose+0x105 sys/dev/dt/dt_dev.c:232
#6 spec_close+0x45f sys/kern/spec_vnops.c:-1
#7 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
#8 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#8 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#9 fdrop+0x126 sys/kern/kern_descrip.c:1265
#10 closef+0x192 sys/kern/kern_descrip.c:1249
#11 fdfree+0x116 sys/kern/kern_descrip.c:1181
#12 exit1+0x58f sys/kern/kern_exit.c:214
#13 sys_exit+0x1a sys/kern/kern_exit.c:-1
#14 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#14 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#15 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 11137K 11503K 166960K 12301 0
pcb 18 14K 16K 166960K 198 0
rtable 218 10K 11K 166960K 569 0
pf 39 18K 82K 166960K 116 0
ifaddr 38 6K 8K 166960K 88 0
ifgroup 59 2K 2K 166960K 139 0
sysctl 4 1K 1K 166960K 4 0
counters 66 36K 37K 166960K 128 0
ioctlops 0 0K 4K 166960K 1557 0
iov 0 0K 24K 166960K 35 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1397 88K 88K 166960K 1942 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 16 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 38 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 765 0
sigio 0 0K 0K 166960K 20 0
proc 72 91K 152K 166960K 743 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 161 0
in_multi 77 5K 7K 166960K 163 0
ether_multi 1 0K 0K 166960K 4 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 97 440K 440K 166960K 97 0
exec 0 0K 1K 166960K 473 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 246 169K 184K 166960K 8491 0
UVM aobj 22 6K 8K 166960K 27 0
pinsyscall 43 86K 105K 166960K 1976 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 45 0
NDP 13 0K 2K 166960K 57 0
temp 55 8686K 8808K 166960K 15882 0
kqueue 15 22K 28K 166960K 118 0
SYN cache 2 32K 40K 166960K 3 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 75 0 72 1 0 1 1 0 8 0
rtentry 176 176 0 85 6 0 6 6 0 8 0
unpcb 144 426 0 398 5 3 2 4 0 8 0
syncache 336 6 0 6 2 1 1 1 0 8 1
tcpcb 808 184 0 180 6 2 4 4 0 8 3
arp 128 28 0 14 1 0 1 1 0 8 0
inpcb 384 660 0 650 9 2 7 8 0 8 5
nd6 144 41 0 22 1 0 1 1 0 8 0
pkpcb 40 5 0 5 1 1 0 1 0 8 0
kcovpl 48 12 0 4 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 16 0 16 1 0 1 1 0 8 1
pppxif 1504 6 0 6 2 1 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 4 0 1 1 0 1 1 0 8 0
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 63 0 17 1 0 1 1 0 8 0
pfstkey 128 63 0 17 2 0 2 2 0 8 0
pfstate 384 62 0 16 6 0 6 6 0 8 0
pfrule 1344 29 0 19 2 1 1 2 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 682 0 308 29 0 29 29 0 8 4
art_table 32 685 0 308 4 0 4 4 0 8 0
art_node 16 172 0 89 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 7 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 34 0 24 1 0 1 1 0 8 0
shmpl 112 24 0 5 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2629 0 1112 96 0 96 96 0 8 0
ffsino 288 2629 0 1112 109 0 109 109 0 8 0
nchpl 144 3663 0 1957 64 0 64 64 0 8 0
rtmask 32 4 0 4 2 1 1 1 0 8 1
uvmvnodes 80 3077 0 0 63 0 63 63 0 8 0
vnodes 216 3077 0 0 171 0 171 171 0 8 0
namei 1024 12191 0 12191 2 1 1 2 0 8 1
percpumem 16 79 0 31 1 0 1 1 0 8 0
pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0
kstatmem 264 66 0 40 3 0 3 3 0 8 1
scsiplug 72 2 0 2 2 1 1 1 0 8 1
scxspl 216 13310 0 13310 10 9 1 8 1 8 1
plimitpl 152 103 0 84 1 0 1 1 0 8 0
sigapl 424 1083 0 1012 9 0 9 9 0 8 0
futexpl 64 9324 0 9319 1 0 1 1 0 8 0
knotepl 120 552 0 0 17 0 17 17 0 8 0
kqueuepl 224 329 0 319 7 3 4 5 0 8 3
pipepl 336 178 0 150 3 0 3 3 0 8 0
fdescpl 520 1044 0 1012 3 0 3 3 0 8 0
filepl 160 5566 0 5318 13 1 12 13 0 8 0
lockfpl 104 285 0 276 1 0 1 1 0 8 0
lockfspl 48 78 0 74 1 0 1 1 0 8 0
sessionpl 144 30 0 21 1 0 1 1 0 8 0
pgrppl 48 52 0 35 1 0 1 1 0 8 0
ucredpl 104 879 0 863 1 0 1 1 0 8 0
zombiepl 144 1014 0 1012 1 0 1 1 0 8 0
processpl 1192 1083 0 1012 6 0 6 6 0 8 0
procpl 656 2100 0 2017 8 0 8 8 0 8 0
srpgc 96 12 0 12 1 0 1 1 0 8 1
sosppl 168 6 0 6 1 0 1 1 0 8 1
sockpl 728 1176 0 1135 9 1 8 9 0 8 4
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 114 0 0 15 0 15 15 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 33 0 0 5 0 5 5 0 8 0
mtagpl 96 29 0 0 1 0 1 1 0 8 0
mbufpl 256 252 0 0 16 0 16 16 0 8 0
bufpl 280 4306 0 124 299 0 299 299 0 8 0
anonpl 32 11685 0 0 95 0 95 95 0 246 0
amapchunkpl 152 27448 0 26944 30 0 30 30 0 158 7
amappl16 200 3652 0 3615 30 15 15 23 0 8 10
amappl15 192 6 0 6 2 2 0 1 0 8 0
amappl14 184 124 0 112 1 0 1 1 0 8 0
amappl13 176 3 0 3 1 1 0 1 0 8 0
amappl12 168 1755 0 1723 4 2 2 3 0 8 0
amappl11 160 72 0 57 1 0 1 1 0 8 0
amappl10 152 6 0 6 2 2 0 1 0 8 0
amappl9 144 255 0 255 1 1 0 1 0 8 0
amappl8 136 23 0 21 1 0 1 1 0 8 0
amappl7 128 148 0 134 1 0 1 1 0 8 0
amappl6 120 223 0 220 1 0 1 1 0 8 0
amappl5 112 136 0 126 1 0 1 1 0 8 0
amappl4 104 341 0 321 1 0 1 1 0 8 0
amappl3 96 5270 0 5155 4 0 4 4 0 8 0
amappl2 88 741 0 677 2 0 2 2 0 8 0
amappl1 80 11788 0 11172 17 1 16 16 0 8 0
amappl 88 7604 0 7434 5 0 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 7 0 7 2 2 0 1 0 8 0
dma128 128 254 0 254 2 2 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 26 0 5 1 0 1 1 0 8 0
uaddrrnd 24 1044 0 1012 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1044 0 1012 1 0 1 1 0 8 0
vmmpekpl 168 9880 0 9829 3 0 3 3 0 8 0
vmmpepl 168 72855 0 70781 114 2 112 112 0 357 8
vmsppl 480 1043 0 1012 5 0 5 5 0 8 0
rwobjpl 72 24664 0 20612 80 0 80 80 0 8 0
pdppl 4096 2095 0 2024 115 42 73 85 0 8 2
pvpl 32 18602 0 0 153 2 151 151 0 265 0
pmappl 256 1043 0 1012 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 415 0 50 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83828ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
mtx_enter(ffffffff83829de8) at mtx_enter+0xa5 sys/kern/kern_lock.c:241
clockintr_dispatch(ffff80003c4d3e60) at clockintr_dispatch+0x3b4 sys/kern/kern_clockintr.c:215
lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:489
Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a
end of kernel
end trace frame: 0x7d3726045730, count: -7
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff838eec28,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
mtx_enter(ffffffff838eec18) at mtx_enter+0x47 sys/kern/kern_lock.c:238
sleep_setup(ffffffff83829e48,220,ffffffff83399e6d) at sleep_setup+0xc6 sys/kern/kern_synch.c:348
msleep(ffffffff83829e48,ffffffff83829de8,220,ffffffff83399e6d,0) at msleep+0x114 sys/kern/kern_synch.c:245
dt_ioctl_record_stop(ffff80000146d000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002f7d6790) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805d402878,81,fffffd807f7d3138,ffff80003c468d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806be189b0,ffff80003c468d08) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd806be189b0,ffff80003c468d08) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80003c468d08) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80003c468d08,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80003c468d08,ffff80002f7d6b00,ffff80002f7d6a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002f7d6b00) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002f7d6b00) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6fab7c8a6560, count: -17
---
This report is generated by a bot. It may contain errors.
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syzbot found the following issue on:
HEAD commit: e8eeea37c7e6 Return EPERM if uvm_map_immutable hits a MAP_..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12af6c70580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=8f5c1beabd11c2de64bb
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f157aac6cca5/disk-e8eeea37.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/47933417a14f/bsd-e8eeea37.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bd7534f4b057/kernel-e8eeea37.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8f5c1b...@syzkaller.appspotmail.com
witness: lock order reversal:
1st 0xffffffff83829df8 &cq->cq_mtx (&cq->cq_mtx)
2nd 0xffffffff838eec28 &sched_lock (&sched_lock)
lock order [1] &cq->cq_mtx (&cq->cq_mtx) -> [2] &sched_lock (&sched_lock)
#0 mtx_enter+0x47 sys/kern/kern_lock.c:238
#1 sleep_setup+0xc6 sys/kern/kern_synch.c:348
#2 msleep+0x114 sys/kern/kern_synch.c:245
#3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
#4 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
#4 dtclose+0x105 sys/dev/dt/dt_dev.c:232
#5 spec_close+0x45f sys/kern/spec_vnops.c:-1
#6 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
#7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#8 fdrop+0x126 sys/kern/kern_descrip.c:1265
#9 closef+0x192 sys/kern/kern_descrip.c:1249
#10 fdfree+0x116 sys/kern/kern_descrip.c:1181
#11 exit1+0x58f sys/kern/kern_exit.c:214
#12 sys_exit+0x1a sys/kern/kern_exit.c:-1
#13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
lock order [2] &sched_lock (&sched_lock) -> [1] &cq->cq_mtx (&cq->cq_mtx)
#0 mtx_enter+0x47 sys/kern/kern_lock.c:238
#1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323
#2 mi_switch+0x165 x86_atomic_clearbits_u32 machine/atomic.h:-1 [inline]
#2 mi_switch+0x165 sys/kern/sched_bsd.c:371
#3 sleep_finish+0x24f sys/kern/kern_synch.c:412
#4 rwsleep+0xf2 sys/kern/kern_synch.c:298
#5 futex_wait+0x372 sys/kern/sys_futex.c:250
#6 sys_futex+0x149 sys/kern/sys_futex.c:101
#7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#8 Xsyscall+0x128
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff838eec28,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
mtx_enter(ffffffff838eec18) at mtx_enter+0x47 sys/kern/kern_lock.c:238
sleep_setup(ffffffff83829e48,220,ffffffff83399e6d) at sleep_setup+0xc6 sys/kern/kern_synch.c:348
msleep(ffffffff83829e48,ffffffff83829de8,220,ffffffff83399e6d,0) at msleep+0x114 sys/kern/kern_synch.c:245
dt_ioctl_record_stop(ffff80000146d000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002f7d6790) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805d402878,81,fffffd807f7d3138,ffff80003c468d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806be189b0,ffff80003c468d08) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd806be189b0,ffff80003c468d08) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80003c468d08) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80003c468d08,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80003c468d08,ffff80002f7d6b00,ffff80002f7d6a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002f7d6b00) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002f7d6b00) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6fab7c8a6560, count: -17
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002f7d64a0
rbx 0xfffffd8004738c48
rdx 0
rcx 0xffff80003c468d08
rax 0xffff8000299ddff0
r8 0xffff80002f7d6380
r9 0x8080808080808080
r10 0x17317a6c5f8b6cb0
r11 0x2587842f6385fd26
r12 0
r13 0xfffffd8003f48340
r14 0x3
r15 0xffffffff
rip 0xffffffff8224c1f5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002f7d6490
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=112427 pid=11540 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80003c468d08 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c43b740,0xffff80003c469c78
process=0xffff80003c4a12c8 user=0xffff80002f7d1000, vmspace=0xfffffd806bece018
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
93029 231135 33289 0 7 0 syz-executor
93029 128391 33289 0 2 0x4000000 syz-executor
85774 104267 82866 -1 3 0x90 nanoslp syz-executor
85774 461876 82866 -1 3 0x4000090 lockf syz-executor
85774 17008 82866 -1 3 0x4000090 ttyretype syz-executor
85774 76914 82866 -1 3 0x4000090 fsleep syz-executor
43105 296196 95900 0 3 0x80 nanoslp syz-executor
43105 283006 95900 0 3 0x4000080 sbwait syz-executor
43105 468604 95900 0 3 0x4000080 fsleep syz-executor
37939 409355 8291 0 3 0x80 nanoslp syz-executor
37939 3005 8291 0 3 0x4000080 lockf syz-executor
37939 451246 8291 0 3 0x4000080 fsleep syz-executor
95975 264455 11624 0 3 0x80 nanoslp syz-executor
95975 346282 11624 0 3 0x4000080 ttyout syz-executor
95975 141223 11624 0 3 0x4000080 fsleep syz-executor
73328 263465 34245 60929 3 0x90 nanoslp syz-executor
73328 456597 34245 60929 3 0x4000090 ttyin syz-executor
73328 97957 34245 60929 3 0x4000090 fsleep syz-executor
8291 289568 47418 0 3 0x82 nanoslp syz-executor
11624 279218 47418 0 3 0x82 nanoslp syz-executor
15355 208020 1 0 3 0x100083 ttyin getty
12753 230276 0 0 3 0x14280 nfsidl nfsio
45780 390283 0 0 3 0x14280 nfsidl nfsio
54151 368768 0 0 3 0x14280 nfsidl nfsio
34864 75353 0 0 3 0x14280 nfsidl nfsio
78768 118328 0 0 3 0x14280 nfsidl nfsio
84069 518516 0 0 3 0x14280 nfsidl nfsio
97149 111121 0 0 3 0x14280 nfsidl nfsio
38074 438790 0 0 3 0x14280 nfsidl nfsio
93903 52968 0 0 3 0x14280 nfsidl nfsio
96958 355150 0 0 3 0x14280 nfsidl nfsio
47831 412502 0 0 3 0x14280 nfsidl nfsio
42676 258424 0 0 3 0x14280 nfsidl nfsio
68647 506769 0 0 3 0x14280 nfsidl nfsio
2465 313745 0 0 3 0x14280 nfsidl nfsio
57125 199308 0 0 3 0x14280 nfsidl nfsio
78428 294914 0 0 3 0x14280 nfsidl nfsio
61913 409268 0 0 3 0x14280 nfsidl nfsio
40962 54827 0 0 3 0x14280 nfsidl nfsio
92247 321513 0 0 3 0x14280 nfsidl nfsio
65434 249928 0 0 3 0x14280 nfsidl nfsio
40347 276163 47418 0 3 0x82 nanoslp syz-executor
49790 310151 0 0 3 0x14200 bored sosplice
34245 457191 47418 0 3 0x82 nanoslp syz-executor
82866 23169 47418 0 3 0x82 nanoslp syz-executor
74804 222465 47418 0 3 0x82 wait syz-executor
95900 462073 47418 0 3 0x82 nanoslp syz-executor
33289 72637 47418 0 3 0x82 nanoslp syz-executor
47418 98022 38446 0 3 0x82 kqread syz-executor
38446 271984 75097 0 3 0x10008a sigsusp ksh
75097 424587 96488 0 3 0x98 kqread sshd-session
96488 522818 3091 0 3 0x92 kqread sshd-session
3091 422368 1 0 3 0x88 kqread sshd
77513 233509 96052 74 3 0x1100092 bpf pflogd
96052 484283 1 0 3 0x80 sbwait pflogd
74737 176012 91272 73 3 0x1100090 kqread syslogd
91272 439502 1 0 3 0x100082 sbwait syslogd
89852 523226 1 0 3 0x100080 kqread resolvd
72797 96231 87001 77 3 0x100092 kqread dhcpleased
90150 408546 87001 77 3 0x100092 kqread dhcpleased
87001 450389 1 0 3 0x80 kqread dhcpleased
4468 1501 0 0 3 0x14200 bored smr
57868 152479 0 0 3 0x14200 pgzero zerothread
56185 39639 0 0 3 0x14200 aiodoned aiodoned
87728 494331 0 0 3 0x14200 syncer update
28772 101145 0 0 3 0x14200 cleaner cleaner
79624 215608 0 0 3 0x14200 reaper reaper
54594 445620 0 0 3 0x14200 pgdaemon pagedaemon
79435 313387 0 0 3 0x14200 bored viomb
12856 119324 0 0 3 0x40014200 acpi0 acpi0
88850 32513 0 0 3 0x40014200 idle1
99373 121305 0 0 3 0x14200 bored softnet3
87498 69956 0 0 3 0x14200 bored softnet2
74295 290753 0 0 3 0x14200 bored softnet1
76364 501558 0 0 3 0x14200 bored softnet0
83537 237041 0 0 3 0x14200 bored systqmp
9965 408687 0 0 3 0x14200 bored systq
71509 185238 0 0 3 0x14200 tmoslp softclockmp
82917 502259 0 0 3 0x40014200 tmoslp softclock
13325 5982 0 0 3 0x40014200 idle0
1 207150 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &cq->cq_mtx r = 0 (0xffffffff83829df8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
#4 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
#5 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
#5 dtclose+0x105 sys/dev/dt/dt_dev.c:232
#6 spec_close+0x45f sys/kern/spec_vnops.c:-1
#7 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
#8 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#8 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#9 fdrop+0x126 sys/kern/kern_descrip.c:1265
#10 closef+0x192 sys/kern/kern_descrip.c:1249
#11 fdfree+0x116 sys/kern/kern_descrip.c:1181
#12 exit1+0x58f sys/kern/kern_exit.c:214
#13 sys_exit+0x1a sys/kern/kern_exit.c:-1
#14 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#14 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#15 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 11137K 11503K 166960K 12301 0
pcb 18 14K 16K 166960K 198 0
rtable 218 10K 11K 166960K 569 0
pf 39 18K 82K 166960K 116 0
ifaddr 38 6K 8K 166960K 88 0
ifgroup 59 2K 2K 166960K 139 0
sysctl 4 1K 1K 166960K 4 0
counters 66 36K 37K 166960K 128 0
ioctlops 0 0K 4K 166960K 1557 0
iov 0 0K 24K 166960K 35 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1397 88K 88K 166960K 1942 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 16 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 38 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 765 0
sigio 0 0K 0K 166960K 20 0
proc 72 91K 152K 166960K 743 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 161 0
in_multi 77 5K 7K 166960K 163 0
ether_multi 1 0K 0K 166960K 4 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 97 440K 440K 166960K 97 0
exec 0 0K 1K 166960K 473 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 246 169K 184K 166960K 8491 0
UVM aobj 22 6K 8K 166960K 27 0
pinsyscall 43 86K 105K 166960K 1976 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 45 0
NDP 13 0K 2K 166960K 57 0
temp 55 8686K 8808K 166960K 15882 0
kqueue 15 22K 28K 166960K 118 0
SYN cache 2 32K 40K 166960K 3 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 75 0 72 1 0 1 1 0 8 0
rtentry 176 176 0 85 6 0 6 6 0 8 0
unpcb 144 426 0 398 5 3 2 4 0 8 0
syncache 336 6 0 6 2 1 1 1 0 8 1
tcpcb 808 184 0 180 6 2 4 4 0 8 3
arp 128 28 0 14 1 0 1 1 0 8 0
inpcb 384 660 0 650 9 2 7 8 0 8 5
nd6 144 41 0 22 1 0 1 1 0 8 0
pkpcb 40 5 0 5 1 1 0 1 0 8 0
kcovpl 48 12 0 4 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 16 0 16 1 0 1 1 0 8 1
pppxif 1504 6 0 6 2 1 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 4 0 1 1 0 1 1 0 8 0
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 63 0 17 1 0 1 1 0 8 0
pfstkey 128 63 0 17 2 0 2 2 0 8 0
pfstate 384 62 0 16 6 0 6 6 0 8 0
pfrule 1344 29 0 19 2 1 1 2 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 682 0 308 29 0 29 29 0 8 4
art_table 32 685 0 308 4 0 4 4 0 8 0
art_node 16 172 0 89 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 7 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 34 0 24 1 0 1 1 0 8 0
shmpl 112 24 0 5 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2629 0 1112 96 0 96 96 0 8 0
ffsino 288 2629 0 1112 109 0 109 109 0 8 0
nchpl 144 3663 0 1957 64 0 64 64 0 8 0
rtmask 32 4 0 4 2 1 1 1 0 8 1
uvmvnodes 80 3077 0 0 63 0 63 63 0 8 0
vnodes 216 3077 0 0 171 0 171 171 0 8 0
namei 1024 12191 0 12191 2 1 1 2 0 8 1
percpumem 16 79 0 31 1 0 1 1 0 8 0
pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0
kstatmem 264 66 0 40 3 0 3 3 0 8 1
scsiplug 72 2 0 2 2 1 1 1 0 8 1
scxspl 216 13310 0 13310 10 9 1 8 1 8 1
plimitpl 152 103 0 84 1 0 1 1 0 8 0
sigapl 424 1083 0 1012 9 0 9 9 0 8 0
futexpl 64 9324 0 9319 1 0 1 1 0 8 0
knotepl 120 552 0 0 17 0 17 17 0 8 0
kqueuepl 224 329 0 319 7 3 4 5 0 8 3
pipepl 336 178 0 150 3 0 3 3 0 8 0
fdescpl 520 1044 0 1012 3 0 3 3 0 8 0
filepl 160 5566 0 5318 13 1 12 13 0 8 0
lockfpl 104 285 0 276 1 0 1 1 0 8 0
lockfspl 48 78 0 74 1 0 1 1 0 8 0
sessionpl 144 30 0 21 1 0 1 1 0 8 0
pgrppl 48 52 0 35 1 0 1 1 0 8 0
ucredpl 104 879 0 863 1 0 1 1 0 8 0
zombiepl 144 1014 0 1012 1 0 1 1 0 8 0
processpl 1192 1083 0 1012 6 0 6 6 0 8 0
procpl 656 2100 0 2017 8 0 8 8 0 8 0
srpgc 96 12 0 12 1 0 1 1 0 8 1
sosppl 168 6 0 6 1 0 1 1 0 8 1
sockpl 728 1176 0 1135 9 1 8 9 0 8 4
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 114 0 0 15 0 15 15 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 33 0 0 5 0 5 5 0 8 0
mtagpl 96 29 0 0 1 0 1 1 0 8 0
mbufpl 256 252 0 0 16 0 16 16 0 8 0
bufpl 280 4306 0 124 299 0 299 299 0 8 0
anonpl 32 11685 0 0 95 0 95 95 0 246 0
amapchunkpl 152 27448 0 26944 30 0 30 30 0 158 7
amappl16 200 3652 0 3615 30 15 15 23 0 8 10
amappl15 192 6 0 6 2 2 0 1 0 8 0
amappl14 184 124 0 112 1 0 1 1 0 8 0
amappl13 176 3 0 3 1 1 0 1 0 8 0
amappl12 168 1755 0 1723 4 2 2 3 0 8 0
amappl11 160 72 0 57 1 0 1 1 0 8 0
amappl10 152 6 0 6 2 2 0 1 0 8 0
amappl9 144 255 0 255 1 1 0 1 0 8 0
amappl8 136 23 0 21 1 0 1 1 0 8 0
amappl7 128 148 0 134 1 0 1 1 0 8 0
amappl6 120 223 0 220 1 0 1 1 0 8 0
amappl5 112 136 0 126 1 0 1 1 0 8 0
amappl4 104 341 0 321 1 0 1 1 0 8 0
amappl3 96 5270 0 5155 4 0 4 4 0 8 0
amappl2 88 741 0 677 2 0 2 2 0 8 0
amappl1 80 11788 0 11172 17 1 16 16 0 8 0
amappl 88 7604 0 7434 5 0 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 7 0 7 2 2 0 1 0 8 0
dma128 128 254 0 254 2 2 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 26 0 5 1 0 1 1 0 8 0
uaddrrnd 24 1044 0 1012 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1044 0 1012 1 0 1 1 0 8 0
vmmpekpl 168 9880 0 9829 3 0 3 3 0 8 0
vmmpepl 168 72855 0 70781 114 2 112 112 0 357 8
vmsppl 480 1043 0 1012 5 0 5 5 0 8 0
rwobjpl 72 24664 0 20612 80 0 80 80 0 8 0
pdppl 4096 2095 0 2024 115 42 73 85 0 8 2
pvpl 32 18602 0 0 153 2 151 151 0 265 0
pmappl 256 1043 0 1012 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 415 0 50 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83828ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
mtx_enter(ffffffff83829de8) at mtx_enter+0xa5 sys/kern/kern_lock.c:241
clockintr_dispatch(ffff80003c4d3e60) at clockintr_dispatch+0x3b4 sys/kern/kern_clockintr.c:215
lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:489
Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a
end of kernel
end trace frame: 0x7d3726045730, count: -7
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff838eec28,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
mtx_enter(ffffffff838eec18) at mtx_enter+0x47 sys/kern/kern_lock.c:238
sleep_setup(ffffffff83829e48,220,ffffffff83399e6d) at sleep_setup+0xc6 sys/kern/kern_synch.c:348
msleep(ffffffff83829e48,ffffffff83829de8,220,ffffffff83399e6d,0) at msleep+0x114 sys/kern/kern_synch.c:245
dt_ioctl_record_stop(ffff80000146d000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c468d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002f7d6790) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805d402878,81,fffffd807f7d3138,ffff80003c468d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806be189b0,ffff80003c468d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806be189b0,ffff80003c468d08) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd806be189b0,ffff80003c468d08) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80003c468d08) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80003c468d08,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80003c468d08,ffff80002f7d6b00,ffff80002f7d6a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002f7d6b00) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002f7d6b00) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6fab7c8a6560, count: -17
---
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