uvm_fault(0xfffffd800b103998, 0x20, 0, 1) -> e
fatal page fault panic: e r n e aenneli c iasgnserotton a(ssert>siih_ot ate h >sih_state I GSIS_ PENDIN | _RESTA RT)) = = S I S PE NDING" f a i le d i e "/syz k a l le r /m an ag er / ul t i c ernel/ s n/ker oftintr. c l i e 7 1
S art nISstacTART)c =..
IS_PENDING" failed: file "/syzkaller/mnac(ffrs/fuft337190/0)rne /sys/kern/kern_softintr.c", lini +0x1Pd0ar
allel traceback, suppressed...
__assert(ffffffff833bp946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1
softintr_dispatch(0) at softintr_dispatch+0x2ea
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a3336e0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a3336e0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f330a5cd060, count: 249
End of stack trace.
WARNING: SPL NOT LOWERED ON SYSCALL 91 20 EXIT 0 1
Stopped at savectx+0xae: movl $0,%gs:0x688
TID PID UID PRFLAGS PFLAGS CPU COMMAND
225319 18006 0 0 0x4000000 0 syz-executor
* 37168 73309 0 0x10000002 0 1 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766843000dc0, count: 14
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
*cpu0: uvm_fault(0xfffffd800b103998, 0x20, 0, 1) -> e
cpu1: kernel diagnostic assertion "(sih->sih_state & (SIS_PENDING | SIS_RESTART)) == SIS_PENDING" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_softintr.c", line 71
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766843000dc0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a3d7100
rbx 0
rdx 0
rcx 0xffff8000ffff2d08
rax 0x33
r8 0xffff80002a3d7030
r9 0
r10 0x4db40b1e416e1140
r11 0xf631deba4b7765a2
r12 0
r13 0
r14 0xffff8000ffff2d08
r15 0
rip 0xffffffff822643ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002a3d7080
ss 0x10
savectx+0xae: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=37168 pid=73309 tcnt=1 stat=onproc
flags process=10000002<EXEC,WAITEVENT> proc=0
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffff2540,0xffff8000ffff27e8
process=0xffff8000ffff79c8 user=0xffff80002a3d2000, vmspace=0xfffffd806ef6f008
estcpu=36, cpticks=210, pctcpu=0.52, user=3, sys=204, intr=2
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
35518 412394 95615 0 2 0 syz-executor
35518 398412 95615 0 3 0x4000080 fsleep syz-executor
18006 329047 46786 0 2 0 syz-executor
18006 225319 46786 0 7 0x4000000 syz-executor
18006 501410 46786 0 3 0x4000080 fsleep syz-executor
84222 510747 31469 0 2 0 syz-executor
84222 263755 31469 0 2 0x4000000 syz-executor
18191 458440 12002 0 2 0xc80 syz-executor
18191 359731 12002 0 3 0x4000080 lockf syz-executor
18191 350888 12002 0 3 0x4000080 fsleep syz-executor
89461 48627 17515 0 3 0x2 netlock syz-executor
9477 296405 40620 0 4 0x82000 syz-executor
9477 2166 40620 0 2 0x4082000 syz-executor
9477 511593 40620 0 3 0x4002000 suspend syz-executor
9477 27240 40620 0 4 0x4082000 syz-executor
22407 495926 0 0 3 0x14200 acct acct
95615 322587 17515 0 3 0x82 nanoslp syz-executor
30510 517681 0 0 3 0x14200 bored sosplice
46786 264915 17515 0 3 0x82 nanoslp syz-executor
*73309 37168 17515 0 7 0x10000002 syz-executor
56380 107353 17515 0 3 0x82 wait syz-executor
31469 515783 17515 0 3 0x82 nanoslp syz-executor
12002 25904 17515 0 2 0xc82 syz-executor
40620 344176 17515 0 3 0x82 nanoslp syz-executor
17515 239292 74712 0 3 0x82 kqread syz-executor
74712 430411 69964 0 3 0x10008a sigsusp ksh
69964 500987 96050 0 3 0x98 kqread sshd-session
96050 145730 57711 0 3 0x92 kqread sshd-session
21748 74710 1 0 3 0x100083 ttyin getty
57711 108552 1 0 3 0x88 kqread sshd
12692 204693 38537 74 3 0x1100092 bpf pflogd
38537 150319 1 0 3 0x80 sbwait pflogd
4723 269271 30149 73 3 0x1100090 kqread syslogd
30149 106972 1 0 3 0x100082 sbwait syslogd
14978 375866 1 0 3 0x100080 kqread resolvd
82181 310092 75504 77 3 0x100092 kqread dhcpleased
242 109379 75504 77 3 0x100092 kqread dhcpleased
75504 214281 1 0 3 0x80 kqread dhcpleased
91667 262511 0 0 3 0x14200 bored smr
74108 436339 0 0 2 0x14200 zerothread
91263 433794 0 0 3 0x14200 aiodoned aiodoned
74702 401172 0 0 3 0x14200 syncer update
55168 449223 0 0 3 0x14200 cleaner cleaner
80513 463753 0 0 3 0x14200 reaper reaper
94604 297173 0 0 3 0x14200 pgdaemon pagedaemon
55934 48327 0 0 3 0x14200 bored viomb
90459 365280 0 0 3 0x40014200 acpi0 acpi0
12807 141993 0 0 3 0x40014200 idle1
72293 303994 0 0 3 0x14200 bored softnet7
42333 313144 0 0 3 0x14200 bored softnet6
98516 271639 0 0 3 0x14200 bored softnet5
82382 43047 0 0 3 0x14200 bored softnet4
38646 114196 0 0 3 0x14200 bored softnet3
32446 308820 0 0 3 0x14200 bored softnet2
34143 443336 0 0 3 0x14200 bored softnet1
93349 361255 0 0 3 0x14200 bored softnet0
280 453816 0 0 3 0x14200 bored systqmp
12906 43222 0 0 3 0x14200 bored systq
83600 15717 0 0 3 0x14200 tmoslp softclockmp
83230 79959 0 0 3 0x40014200 tmoslp softclock
7926 163867 0 0 3 0x40014200 idle0
1 202133 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 18006 (syz-executor) thread 0xffff8000ffff3238 (225319)
Process 84222 (syz-executor) thread 0xffff80003b02f4e8 (263755)
Process 9477 (syz-executor) thread 0xffff80003b02fa18 (2166)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10262 11093K 11200K 166960K 12618 0
pcb 17 16K 18K 166960K 552 0
rtable 183 10K 13K 166960K 774 0
pf 39 18K 82K 166960K 654 0
ifaddr 35 6K 7K 166960K 148 0
ifgroup 59 2K 2K 166960K 242 0
sysctl 4 1K 9K 166960K 21 0
counters 70 37K 38K 166960K 418 0
ioctlops 0 0K 5K 166960K 2361 0
iov 0 0K 28K 166960K 101 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1394 88K 88K 166960K 2816 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 5K 5K 166960K 13 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 160 0
dirhash 12 2K 3K 166960K 36 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 240K 166960K 1731 0
sigio 0 0K 0K 166960K 30 0
proc 73 115K 164K 166960K 775 0
subproc 72 4K 4K 166960K 92 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 224 0
in_multi 59 4K 7K 166960K 245 0
ether_multi 1 0K 0K 166960K 29 0
mrt 3 0K 0K 166960K 20 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 259 1155K 1155K 166960K 259 0
exec 0 0K 1K 166960K 620 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 4K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 259 168K 185K 166960K 17595 0
UVM aobj 36 2K 2K 166960K 39 0
pinsyscall 42 84K 99K 166960K 2884 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 108 0
NDP 15 0K 2K 166960K 101 0
temp 78 8652K 8720K 166960K 102140 0
kqueue 16 22K 35K 166960K 417 0
SYN cache 2 16K 16K 166960K 2 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 120 160 0 155 1 0 1 1 0 8 0
rtentry 176 187 0 122 5 0 5 5 0 8 0
unpcb 144 994 0 977 9 8 1 4 0 8 0
syncache 336 7 0 7 2 2 0 1 0 8 0
tcpqe 32 3 0 3 1 1 0 1 0 8 0
tcpcb 736 444 0 436 8 6 2 4 0 8 1
arp 128 19 0 7 1 0 1 1 0 8 0
inpcb 328 1908 0 1895 21 14 7 7 0 8 5
nd6 144 33 0 24 1 0 1 1 0 8 0
pkpcb 40 147 0 147 4 3 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
mppekey 1024 2 0 2 1 0 1 1 0 8 1
ppxss 1192 155 0 155 2 1 1 1 0 8 1
pppxif 1504 11 0 11 4 3 1 1 0 8 1
pfstscr 40 2 0 1 1 0 1 1 0 8 0
pffrag 232 16 0 7 1 0 1 1 0 482 0
pffrnode 88 12 0 4 1 0 1 1 0 8 0
pffrent 40 25 0 16 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 100 0 100 4 3 1 1 0 8 1
pfanchor 1288 70 0 67 1 0 1 1 0 8 0
pftag 88 26 0 25 1 0 1 1 0 8 0
pfstitem 24 143 0 42 1 0 1 1 0 8 0
pfstkey 128 149 0 46 4 0 4 4 0 8 0
pfstate 384 142 0 44 10 0 10 10 0 8 0
pfrule 1344 77 0 72 2 1 1 2 0 8 0
rttmr 136 7 0 7 3 2 1 1 0 8 1
art_heap8 4096 6 0 2 6 2 4 6 0 8 0
art_heap4 256 1074 0 781 33 11 22 28 0 8 3
art_table 40 1080 0 783 5 0 5 5 0 8 0
art_node 32 187 0 131 1 0 1 1 0 8 0
sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0
semapl 112 153 0 143 1 0 1 1 0 8 0
shmpl 112 36 0 3 1 0 1 1 0 8 0
dirhash 1024 33 0 16 3 0 3 3 0 8 0
dino2pl 256 4833 0 3322 95 0 95 95 0 8 0
ffsino 296 4833 0 3322 117 0 117 117 0 8 0
nchpl 144 7259 0 5561 64 0 64 64 0 8 0
rtmask 32 19 0 19 4 3 1 1 0 8 1
uvmvnodes 80 5579 0 0 114 0 114 114 0 8 0
vnodes 216 5579 0 0 310 0 310 310 0 8 0
namei 1024 25025 0 25025 4 3 1 2 0 8 1
percpumem 16 224 0 174 1 0 1 1 0 8 0
pfiaddrpl 120 25 0 25 4 3 1 1 0 8 1
kstatmem 264 160 0 130 3 0 3 3 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 5 0 5 3 3 0 1 0 8 0
scxspl 216 49304 0 49304 14 12 2 8 1 8 2
plimitpl 152 589 0 567 1 0 1 1 0 8 0
sigapl 424 2066 0 2010 10 1 9 9 0 8 1
knotepl 120 1005 0 0 30 0 30 30 0 8 0
kqueuepl 224 687 0 676 8 6 2 5 0 8 1
pipepl 344 355 0 328 15 4 11 14 0 8 8
fdescpl 528 1993 0 1962 3 0 3 3 0 8 0
filepl 160 13072 0 12847 34 15 19 23 0 8 8
lockfpl 104 919 0 915 2 1 1 2 0 8 0
lockfspl 48 266 0 263 1 0 1 1 0 8 0
sessionpl 144 28 0 19 1 0 1 1 0 8 0
pgrppl 48 57 0 40 1 0 1 1 0 8 0
ucredpl 104 2424 0 2410 1 0 1 1 0 8 0
zombiepl 144 2339 0 2336 1 0 1 1 0 8 0
processpl 1232 2066 0 2010 7 1 6 6 0 8 1
procpl 664 4793 0 4728 13 5 8 9 0 8 1
sosppl 168 16 0 16 2 1 1 1 0 8 1
sockpl 752 3305 0 3270 32 21 11 14 0 8 6
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 121 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 69 0 0 9 0 9 9 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 1113 0 0 70 0 70 70 0 8 0
bufpl 280 21044 0 14901 440 0 440 440 0 8 0
anonpl 32 12507 0 0 102 1 101 101 0 246 0
amapchunkpl 152 59193 0 58594 55 15 40 40 0 158 13
amappl16 200 7202 0 7025 49 31 18 26 0 8 8
amappl15 192 9 0 8 3 2 1 1 0 8 0
amappl14 184 153 0 141 1 0 1 1 0 8 0
amappl13 176 1 0 1 1 1 0 1 0 8 0
amappl12 168 2683 0 2652 3 1 2 2 0 8 0
amappl11 160 54 0 40 1 0 1 1 0 8 0
amappl10 152 6 0 6 1 1 0 1 0 8 0
amappl9 144 249 0 248 1 0 1 1 0 8 0
amappl8 136 25 0 22 1 0 1 1 0 8 0
amappl7 128 118 0 105 1 0 1 1 0 8 0
amappl6 120 276 0 272 1 0 1 1 0 8 0
amappl5 112 132 0 122 1 0 1 1 0 8 0
amappl4 104 327 0 307 1 0 1 1 0 8 0
amappl3 96 10443 0 10338 3 0 3 3 0 8 0
amappl2 88 2280 0 2199 2 0 2 2 0 8 0
amappl1 80 15570 0 14962 16 2 14 15 0 8 0
amappl 88 16552 0 16370 5 0 5 5 0 92 0
dma16384 16384 1 0 1 1 1 0 1 0 8 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
dma512 512 1 0 1 1 1 0 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 10 0 10 5 5 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 21 0 20 1 0 1 1 0 8 0
aobjpl 72 38 0 3 1 0 1 1 0 8 0
uaddrrnd 24 1993 0 1962 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1993 0 1962 1 0 1 1 0 8 0
vmmpekpl 168 17587 0 17545 3 0 3 3 0 8 0
vmmpepl 168 130209 0 128029 120 14 106 109 0 357 3
vmsppl 488 1992 0 1962 7 2 5 5 0 8 0
rwobjpl 80 41096 0 34372 138 0 138 138 0 8 0
pdppl 4096 3994 0 3924 108 34 74 82 0 8 4
pvpl 32 21257 0 0 173 1 172 172 0 265 0
pmappl 256 1992 0 1962 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 367 0 63 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83830ff0) 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
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165
vio_ctrleof(ffff80000019fb00) at vio_ctrleof+0x4a sys/dev/pv/if_vio.c:1983
intr_handler(ffff8000360068d0,ffff80000006a200) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:563
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
Xspllower() at Xspllower+0x1d
cnputc(70) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723
db_printf(ffffffff8337b692) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff83371900) at panic+0x12d sys/kern/subr_prf.c:218
__assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1
end trace frame: 0xffff800036006d40, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff83830ff0) 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
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165
vio_ctrleof(ffff80000019fb00) at vio_ctrleof+0x4a sys/dev/pv/if_vio.c:1983
intr_handler(ffff8000360068d0,ffff80000006a200) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:563
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
Xspllower() at Xspllower+0x1d
cnputc(70) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723
db_printf(ffffffff8337b692) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff83371900) at panic+0x12d sys/kern/subr_prf.c:218
__assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1
softintr_dispatch(0) at softintr_dispatch+0x2ea
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
tsleep_nsec(ffff8000000396f4,10,ffffffff833adf1c,12a05f200) at tsleep_nsec+0x1e4 sys/kern/kern_synch.c:143
vio_ctrl_submit(ffff800000039000,0) at vio_ctrl_submit+0x181 sys/dev/pv/if_vio.c:1832
vio_ctrl_mq(ffff800000039000) at vio_ctrl_mq+0x116 sys/dev/pv/if_vio.c:1919
vio_stop(ffff800000039058,1) at vio_stop+0x525 virtio_has_feature sys/dev/pv/virtiovar.h:226 [inline]
vio_stop(ffff800000039058,1) at vio_stop+0x525 sys/dev/pv/if_vio.c:1046
vio_ioctl(ffff800000039058,80206910,ffff800036007010) at vio_ioctl+0x565 sys/dev/pv/if_vio.c:-1
if_downall() at if_downall+0xe2 sys/net/if.c:1722
boot(104) at boot+0x1e1 sys/arch/amd64/amd64/machdep.c:922
reboot(104) at reboot+0xb1
panic(ffffffff83371900) at panic+0x1f9
__assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1
softintr_dispatch(0) at softintr_dispatch+0x2ea
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
cnputc(20) at cnputc+0x67 sys/dev/cons.c:218
kputchar(20,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367
kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723
printf(ffffffff833377d8) at printf+0x8b sys/kern/subr_prf.c:529
trap_print(ffff800036007590,6) at trap_print+0xd8 sys/arch/amd64/amd64/trap.c:631
kerntrap(ffff800036007590) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:485
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
mtx_enter_try(18) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290
mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261
clockintr_unbind(ffff8000014e2b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001479000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582
dtclose(11e5f,81,2000,ffff8000ffff3238) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff8000ffff3238) at dtclose+0x109 sys/dev/dt/dt_dev.c:232
spec_close(ffff800036007820) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd807d02f7e8,81,fffffd80097fb750,ffff8000ffff3238) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b86fd60,ffff8000ffff3238) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b86fd60,ffff8000ffff3238) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806b86fd60,ffff8000ffff3238) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806b86fd60,ffff8000ffff3238) at closef+0x192 sys/kern/kern_descrip.c:1264
syscall(ffff800036007a80) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800036007a80) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdde011588f0, count: -49
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766843000dc0, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x766843000dc0, count: -1