*cpu0: uvm_fault(0xfffff3006c6a6b88, 0x98, 0, 1) -> e
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x79a995b81c90, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002eb84c90
rbx 0
rdx 0
rcx 0xffff8000fffe9ca8
rax 0x3b
r8 0xffff80002eb84bc0
r9 0
r10 0x73ab463dac2e2fcc
r11 0x5bd7c6ede308b347
r12 0
r13 0
r14 0xffff8000fffe9ca8
r15 0
rip 0xffffffff81f903ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002eb84c10
ss 0x10
savectx+0xae: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=285201 pid=22917 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=50, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800034f99cb0,0xffff8000fffe8fc0
process=0xffff8000fffef038 user=0xffff80002eb7f000, vmspace=0xfffff3006c6a65d0
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*22917 285201 37382 0 7 0 syz-executor
22917 395645 37382 0 3 0x4000080 fsleep syz-executor
45949 150520 23566 0 2 0 syz-executor
45949 276835 23566 0 7 0x4000000 syz-executor
86959 279865 98849 0 2 0 syz-executor
86959 436108 98849 0 3 0x4000080 lockf syz-executor
86959 426334 98849 0 3 0x4000080 lockf syz-executor
72182 216023 88777 0 2 0 syz-executor
72182 228811 88777 0 3 0x4000080 sbwait syz-executor
72182 6301 88777 0 3 0x4000000 sbufrcv syz-executor
67543 215168 63793 0 2 0 syz-executor
67543 318571 63793 0 3 0x4000080 fsleep syz-executor
73789 366776 32931 0 2 0 syz-executor
73789 148581 32931 0 3 0x4000080 fsleep syz-executor
73789 427891 32931 0 3 0x4000080 fsleep syz-executor
73789 357106 32931 0 3 0x4000080 fsleep syz-executor
72499 411744 38000 0 3 0x80 nanoslp syz-executor
72499 429541 38000 0 3 0x4000080 sbwait syz-executor
72499 414126 38000 0 3 0x4000080 sbwait syz-executor
72499 85653 38000 0 3 0x4000080 fsleep syz-executor
98849 423439 92883 0 3 0x82 nanoslp syz-executor
37382 125959 92883 0 2 0xc82 syz-executor
84147 252261 92883 0 2 0x2 syz-executor
88777 258672 92883 0 3 0x82 nanoslp syz-executor
32931 300937 92883 0 3 0x82 nanoslp syz-executor
38000 36289 92883 0 3 0x82 nanoslp syz-executor
23566 292564 92883 0 2 0xc82 syz-executor
63793 20963 92883 0 3 0x82 nanoslp syz-executor
92883 11618 87114 0 3 0x82 kqread syz-executor
87114 241052 13431 0 3 0x10008a sigsusp ksh
13431 480787 27860 0 3 0x98 kqread sshd-session
27860 72250 58028 0 3 0x92 kqread sshd-session
7417 273533 1 0 3 0x100083 ttyin getty
58028 452085 1 0 3 0x88 kqread sshd
85816 218846 57595 74 3 0x1100092 bpf pflogd
57595 61564 1 0 3 0x80 sbwait pflogd
42075 369493 30933 73 3 0x1100090 kqread syslogd
30933 150776 1 0 3 0x100082 sbwait syslogd
35614 256044 1 0 3 0x100080 kqread resolvd
66208 231396 49289 77 3 0x100092 kqread dhcpleased
1753 282900 49289 77 3 0x100092 kqread dhcpleased
49289 491460 1 0 3 0x80 kqread dhcpleased
46295 400381 0 0 3 0x14200 bored smr
59060 255816 0 0 2 0x14200 zerothread
74655 202609 0 0 3 0x14200 aiodoned aiodoned
56258 262378 0 0 3 0x14200 syncer update
20109 82031 0 0 3 0x14200 cleaner cleaner
20131 375928 0 0 3 0x14200 reaper reaper
60252 496719 0 0 3 0x14200 pgdaemon pagedaemon
22943 127469 0 0 3 0x14200 bored viomb
98864 59714 0 0 3 0x40014200 acpi0 acpi0
56710 170290 0 0 3 0x40014200 idle1
4058 230134 0 0 3 0x14200 bored softnet1
14917 431736 0 0 3 0x14200 bored softnet0
8784 277078 0 0 3 0x14200 bored systqmp
60166 40133 0 0 3 0x14200 bored systq
73015 33560 0 0 3 0x14200 tmoslp softclockmp
35446 334244 0 0 3 0x40014200 tmoslp softclock
47106 399599 0 0 3 0x40014200 idle0
1 326797 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffff3006c4acf10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173
#3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline]
#3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 22917 (syz-executor) thread 0xffff8000fffe9ca8 (285201)
exclusive rwlock uobjlk r = 0 (0xfffff3006c5f5610)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 uvm_map_protect+0xb36 sys/uvm/uvm_map.c:3202
#3 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#5 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffff3006c6a66d0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
exclusive mutex &pmap->pm_mtx r = 0 (0xfffff3006c4acf10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173
#3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline]
#3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 45949 (syz-executor) thread 0xffff800034f98028 (276835)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a2ff00)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
#2 Xsyscall+0x128
Process 72182 (syz-executor) thread 0xffff8000fffe8550 (228811)
exclusive rwlock sbufrcv r = 0 (0xffff800001652470)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 soreceive+0x27d sys/kern/uipc_socket.c:890
#4 recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#7 Xsyscall+0x128
Process 84147 (syz-executor) thread 0xffff80002a2414d8 (252261)
exclusive rrwlock inode r = 0 (0xfffff3006c26fc58)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vget+0x2a2 sys/kern/vfs_subr.c:686
#6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff3006d1c41e0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6 namei+0x7c5 sys/kern/vfs_lookup.c:250
#7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11076 12213K 12350K 166960K 12460 0
pcb 17 14K 15K 166960K 65 0
rtable 213 8K 9K 166960K 385 0
pf 38 18K 18K 166960K 60 0
ifaddr 38 6K 7K 166960K 52 0
ifgroup 55 2K 2K 166960K 70 0
sysctl 3 1K 9K 166960K 7 0
counters 70 37K 37K 166960K 82 0
ioctlops 0 0K 4K 166960K 1516 0
iov 1 4K 12K 166960K 12 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1358 85K 86K 166960K 1600 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 3 5K 9K 166960K 7 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 19 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 97K 166960K 327 0
sigio 0 0K 0K 166960K 2 0
proc 72 115K 164K 166960K 577 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 19 0
in_multi 81 5K 7K 166960K 107 0
ether_multi 1 0K 0K 166960K 3 0
mrt 0 0K 0K 166960K 8 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 458 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 246 168K 177K 166960K 4731 0
UVM aobj 9 2K 3K 166960K 10 0
pinsyscall 42 84K 107K 166960K 1486 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 6 0
NDP 12 0K 1K 166960K 33 0
temp 37 9118K 9126K 166960K 7487 0
kqueue 14 22K 30K 166960K 57 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 76 0 73 2 0 2 2 0 8 1
rtentry 176 117 0 24 5 0 5 5 0 8 0
unpcb 144 471 0 448 6 0 6 6 0 8 5
syncache 336 4 0 4 1 1 0 1 0 8 0
tcpcb 736 77 0 73 4 0 4 4 0 8 3
arp 136 18 0 4 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 375 0 367 7 0 7 7 0 8 6
nd6 152 29 0 7 1 0 1 1 0 8 0
pkpcb 40 1 0 1 1 0 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 3 0 3 1 1 0 1 0 8 0
pfstscr 40 6 0 4 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
pfsrclim 320 1 0 1 1 0 1 1 0 8 1
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 320 1 0 0 1 0 1 1 0 8 0
pfstitem 24 25 0 0 1 0 1 1 0 8 0
pfstkey 128 29 0 4 1 0 1 1 0 8 0
pfstate 448 26 0 2 3 0 3 3 0 8 0
pfrule 1360 22 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 510 0 99 29 0 29 29 0 8 2
art_table 40 511 0 99 5 0 5 5 0 8 0
art_node 32 117 0 33 1 0 1 1 0 8 0
semapl 72 15 0 5 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1879 0 412 93 0 93 93 0 8 0
ffsino 296 1879 0 412 114 0 114 114 0 8 0
nchpl 144 2356 0 653 64 0 64 64 0 8 0
rtmask 32 2 0 2 1 1 0 1 0 8 0
vnodes 216 2144 0 0 120 0 120 120 0 8 0
namei 1024 7575 0 7575 1 0 1 1 0 8 1
percpumem 16 56 0 6 1 0 1 1 0 8 0
kstatmem 264 37 0 8 3 0 3 3 0 8 0
scsiplug 72 1 0 1 1 0 1 1 0 8 1
scxspl 216 7521 0 7521 4 3 1 3 1 8 1
plimitpl 152 48 0 30 1 0 1 1 0 8 0
sigapl 424 645 0 598 7 1 6 7 0 8 0
knotepl 120 638 0 0 20 0 20 20 0 8 0
kqueuepl 224 67 0 57 1 0 1 1 0 8 0
pipepl 344 137 0 110 3 0 3 3 0 8 0
fdescpl 528 629 0 598 3 0 3 3 0 8 0
filepl 160 3330 0 3104 15 0 15 15 0 8 4
lockfpl 104 113 0 107 1 0 1 1 0 8 0
lockfspl 48 50 0 46 1 0 1 1 0 8 0
sessionpl 144 59 0 50 1 0 1 1 0 8 0
pgrppl 48 67 0 50 1 0 1 1 0 8 0
ucredpl 104 339 0 326 1 0 1 1 0 8 0
zombiepl 144 598 0 598 1 0 1 1 0 8 1
processpl 1232 645 0 598 5 1 4 5 0 8 0
procpl 664 986 0 926 6 0 6 6 0 8 0
sockpl 752 926 0 892 19 2 17 17 0 8 12
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 119 0 0 15 0 15 15 0 8 0
mcl2k 2048 21 0 0 3 0 3 3 0 8 0
mtagpl 96 4 0 0 1 0 1 1 0 8 0
mbufpl 256 322 0 0 21 0 21 21 0 8 0
bufpl 272 2554 0 106 164 0 164 164 0 8 0
anonpl 32 7560 0 0 61 0 61 61 0 246 0
amapchunkpl 152 14112 0 13470 27 1 26 26 0 158 0
amappl16 200 2104 0 2076 22 7 15 15 0 8 12
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 430 0 429 1 0 1 1 0 8 0
amappl13 176 124 0 112 1 0 1 1 0 8 0
amappl12 168 875 0 845 2 0 2 2 0 8 0
amappl11 160 20 0 20 2 2 0 1 0 8 0
amappl10 152 65 0 51 1 0 1 1 0 8 0
amappl9 144 293 0 293 1 1 0 1 0 8 0
amappl8 136 111 0 109 1 0 1 1 0 8 0
amappl7 128 148 0 134 1 0 1 1 0 8 0
amappl6 120 161 0 160 1 0 1 1 0 8 0
amappl5 112 96 0 85 1 0 1 1 0 8 0
amappl4 104 298 0 279 1 0 1 1 0 8 0
amappl3 96 2800 0 2678 4 0 4 4 0 8 0
amappl2 88 538 0 478 2 0 2 2 0 8 0
amappl1 80 11285 0 10683 14 0 14 14 0 8 1
amappl 88 3977 0 3804 5 0 5 5 0 92 0
uvmvnodes 80 106 0 0 3 0 3 3 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
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 1 1 1 0 8 1
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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 629 0 598 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 629 0 598 1 0 1 1 0 8 0
vmmpekpl 168 7058 0 7028 2 0 2 2 0 8 0
vmmpepl 168 48525 0 46593 97 0 97 97 0 357 10
vmsppl 488 628 0 598 5 0 5 5 0 8 1
rwobjpl 80 16891 0 15837 27 0 27 27 0 8 2
pdppl 4096 1265 0 1196 99 28 71 87 0 8 2
pvpl 32 14902 0 0 121 0 121 121 0 265 0
pmappl 256 628 0 598 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 448 0 32 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff838f1ff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670
comcnputc(800,6c) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,6c) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(6c) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(6c) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff834ae33d) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff80003c402470) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff80003c402470) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff80003c402470) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dovutimens(ffff800034f98028,fffff3006b862d90,ffff80003c402650) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimes(ffff800034f98028,ffff80003c4027a0,ffff80003c4026f0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732
end trace frame: 0xffff80003c402790, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff838f1ff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670
comcnputc(800,6c) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,6c) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(6c) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(6c) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff834ae33d) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff80003c402470) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff80003c402470) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff80003c402470) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dovutimens(ffff800034f98028,fffff3006b862d90,ffff80003c402650) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimes(ffff800034f98028,ffff80003c4027a0,ffff80003c4026f0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732
syscall(ffff80003c4027a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4027a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x908226a6800, count: -16
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x79a995b81c90, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x79a995b81c90, count: -1