uvm_fault: x86_ipi_db (9)
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syzbot
Feb 14, 2025, 6:55:26 PM2/14/25
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 8d2464095911 It is important that we map memory with the r..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15824f18580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=a157c6e0d81b4f6b71a4
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c82b14a3555e/disk-8d246409.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a418f893f346/bsd-8d246409.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/40a5e6830236/kernel-8d246409.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a157c6...@syzkaller.appspotmail.com
*cpu1: uvm_fault(0xffffffff838a5888, 0xffff8000014d102a, 0, 1) -> e
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x786320b45560, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff8000310aab40
rbx 0
rdx 0
rcx 0xffff80002f8a02b8
rax 0x32
r8 0xffff8000310aaa70
r9 0x2080713 __kernel_phys_base+0x1080713
r10 0x67a55369c0332ba
r11 0xccd6bc351209813c
r12 0
r13 0
r14 0xffff80002f8a02b8
r15 0
rip 0xffffffff82b2c3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff8000310aaac0
ss 0
savectx+0xae: movl $0,%gs:0x680
ddb{0}> show proc
PROC (syz-executor) tid=370055 pid=87016 tcnt=4 stat=onproc
flags process=0 proc=0
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002f8a0cf8,0xffff80002f8a0038
process=0xffff80002f09bdc8 user=0xffff8000310a5000, vmspace=0xfffffd8064a21910
estcpu=36, cpticks=3, pctcpu=0.0, user=3, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
48337 464933 84257 0 2 0 syz-executor
48337 367593 84257 0 3 0x4000080 fsleep syz-executor
71570 521744 23075 0 2 0 syz-executor
71570 469476 23075 0 3 0x4000080 fsleep syz-executor
*87016 370055 86335 0 7 0 syz-executor
87016 481249 86335 0 7 0x4000000 syz-executor
87016 306610 86335 0 2 0x4000000 syz-executor
87016 239556 86335 0 2 0x4000000 syz-executor
29920 442865 98815 0 2 0 syz-executor
29920 352235 98815 0 3 0x4000080 sbwait syz-executor
31484 101045 20973 0 2 0 syz-executor
31484 254584 20973 0 3 0x4000000 smrbar syz-executor
84776 117085 8884 0 2 0 syz-executor
84776 104803 8884 0 3 0x4000080 fsleep syz-executor
84776 30198 8884 0 3 0x4000080 fsleep syz-executor
16244 142451 58719 0 2 0 syz-executor
16244 343547 58719 0 3 0x4000080 fsleep syz-executor
82871 464561 0 0 3 0x14200 acct acct
25309 16572 64657 0 3 0x82 sbwait sshd-session
99626 230862 64657 0 3 0x82 sbwait sshd-session
34328 387300 0 0 3 0x14200 bored sosplice
58719 445308 52747 0 3 0x82 nanoslp syz-executor
84257 108906 52747 0 3 0x82 nanoslp syz-executor
86335 298375 52747 0 3 0x82 nanoslp syz-executor
23075 332316 52747 0 3 0x82 nanoslp syz-executor
95218 172388 52747 0 3 0x82 wait syz-executor
98815 164646 52747 0 3 0x82 nanoslp syz-executor
8884 339083 52747 0 3 0x82 nanoslp syz-executor
20973 490526 52747 0 3 0x82 nanoslp syz-executor
52747 76055 69655 0 3 0x82 kqread syz-executor
69655 323595 75528 0 3 0x10008a sigsusp ksh
75528 142191 44977 0 3 0x98 kqread sshd-session
44977 181254 64657 0 3 0x92 kqread sshd-session
81238 444316 1 0 3 0x100083 ttyin getty
64657 144277 1 0 3 0x88 kqread sshd
78763 180435 5585 74 3 0x1100092 bpf pflogd
5585 326251 1 0 3 0x80 sbwait pflogd
33018 141350 87765 73 3 0x1100090 kqread syslogd
87765 507902 1 0 3 0x100082 sbwait syslogd
9496 51285 1 0 3 0x100080 kqread resolvd
68457 268593 54496 77 3 0x100092 kqread dhcpleased
19157 186326 54496 77 3 0x100092 kqread dhcpleased
54496 62304 1 0 3 0x80 kqread dhcpleased
9725 516434 0 0 3 0x14200 bored smr
68484 332645 0 0 2 0x14200 zerothread
32015 305598 0 0 3 0x14200 aiodoned aiodoned
40810 86019 0 0 3 0x14200 syncer update
8038 287752 0 0 3 0x14200 cleaner cleaner
40493 425643 0 0 3 0x14200 reaper reaper
97934 133777 0 0 3 0x14200 pgdaemon pagedaemon
65725 54509 0 0 3 0x14200 bored viomb
40413 63515 0 0 3 0x40014200 acpi0 acpi0
10701 460659 0 0 3 0x40014200 idle1
33707 303153 0 0 3 0x14200 bored softnet3
7374 299028 0 0 3 0x14200 bored softnet2
32153 373637 0 0 3 0x14200 bored softnet1
8977 351697 0 0 3 0x14200 bored softnet0
77631 306400 0 0 2 0x14200 systqmp
17271 289628 0 0 3 0x14200 bored systq
65880 335632 0 0 3 0x14200 tmoslp softclockmp
33111 505423 0 0 3 0x40014200 tmoslp softclock
94905 431311 0 0 3 0x40014200 idle0
1 420221 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &sched_lock r = 0 (0xffffffff838962a0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 yield+0x35 sys/kern/sched_bsd.c:317
#4 pool_get+0x265 sys/kern/subr_pool.c:593
#5 namei+0xdf sys/kern/vfs_lookup.c:145
#6 vn_open+0x13f sys/kern/vfs_vnops.c:140
#7 doopenat+0x32e sys/kern/vfs_syscalls.c:1133
#8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002f8a1c58 (481249)
exclusive rwlock netlock r = 0 (0xffffffff837c0b08)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rtm_output+0x78d sys/net/rtsock.c:969
#3 route_output+0x9a1 sys/net/rtsock.c:878
#4 route_send+0xd7 sys/net/rtsock.c:342
#5 sosend+0x804
#6 sendit+0x721 sys/kern/uipc_syscalls.c:779
#7 sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
#8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff800010fd8cd8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 sblock+0xb7 sys/kern/uipc_socket2.c:537
#3 sosend+0x2e2 sys/kern/uipc_socket.c:631
#4 sendit+0x721 sys/kern/uipc_syscalls.c:779
#5 sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
#6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002f8a1218 (306610)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e0228)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 doopenat+0x314 sys/kern/vfs_syscalls.c:1133
#2 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#2 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#3 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002a3322b0 (239556)
exclusive rwlock vmmaplk r = 0 (0xfffffd8064a21a10)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250
#3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858
#4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline]
#4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774
#5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668
#6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
#7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
#8 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10198 11027K 11366K 166960K 11862 0
pcb 17 12K 12K 166960K 80 0
rtable 178 5K 7K 166960K 419 0
pf 36 18K 18K 166960K 72 0
ifaddr 35 5K 7K 166960K 58 0
ifgroup 49 2K 2K 166960K 79 0
sysctl 1 1K 1K 166960K 1 0
counters 64 36K 36K 166960K 86 0
ioctlops 0 0K 4K 166960K 1525 0
iov 0 0K 14K 166960K 23 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1422 89K 90K 166960K 1711 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 52 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 513 0
sigio 0 0K 0K 166960K 5 0
proc 72 91K 140K 166960K 581 0
subproc 72 4K 4K 166960K 73 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 45 0
in_multi 76 5K 7K 166960K 119 0
ether_multi 1 0K 0K 166960K 2 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 85 387K 387K 166960K 85 0
exec 0 0K 1K 166960K 446 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 252 74K 78K 166960K 6418 0
UVM aobj 14 4K 4K 166960K 16 0
pinsyscall 47 94K 104K 166960K 1611 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 13 0
NDP 11 0K 2K 166960K 37 0
temp 46 8636K 8767K 166960K 14084 0
kqueue 14 22K 28K 166960K 87 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 85 0 49 2 0 2 2 0 8 0
rtentry 168 136 0 56 5 0 5 5 0 8 0
unpcb 144 503 0 482 3 1 2 2 0 8 1
syncache 336 7 0 7 4 3 1 1 0 8 1
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 808 167 0 156 5 3 2 5 0 8 0
arp 120 29 0 13 1 0 1 1 0 8 0
inpcb 376 650 0 636 12 8 4 9 0 8 2
nd6 136 25 0 6 1 0 1 1 0 8 0
pkpcb 40 6 0 6 3 2 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1168 8 0 6 3 2 1 1 0 8 0
pppxif 1472 1 0 1 1 1 0 1 0 8 0
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrent 40 1 0 1 1 1 0 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
pfstitem 24 42 0 15 1 0 1 1 0 8 0
pfstkey 128 59 0 32 2 0 2 2 0 8 0
pfstate 376 58 0 31 5 0 5 5 0 8 0
pfrule 1344 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 256 538 0 181 30 1 29 30 0 8 2
art_table 32 539 0 181 4 0 4 4 0 8 0
art_node 16 135 0 67 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 8 2 1 1 1 0 8 1
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 50 0 40 1 0 1 1 0 8 0
shmpl 112 13 0 2 1 0 1 1 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 2279 0 771 95 0 95 95 0 8 0
ffsino 280 2279 0 771 109 0 109 109 0 8 0
nchpl 144 3042 0 1353 63 0 63 63 0 8 0
rtmask 32 1 0 1 1 1 0 1 0 8 0
uvmvnodes 80 2588 0 0 53 0 53 53 0 8 0
vnodes 216 2588 0 0 144 0 144 144 0 8 0
namei 1024 9680 0 9679 5 4 1 2 0 8 0
percpumem 16 57 0 11 1 0 1 1 0 8 0
kstatmem 264 40 0 18 2 0 2 2 0 8 0
scsiplug 72 2 0 2 2 2 0 1 0 8 0
scxspl 216 9731 0 9731 10 3 7 8 1 8 7
plimitpl 152 84 0 66 1 0 1 1 0 8 0
sigapl 424 817 0 763 8 1 7 7 0 8 0
futexpl 64 5880 0 5875 1 0 1 1 0 8 0
knotepl 120 529 0 0 17 0 17 17 0 8 0
kqueuepl 216 198 0 187 3 0 3 3 0 8 2
pipepl 328 195 0 166 8 2 6 8 0 8 3
fdescpl 504 797 0 763 5 0 5 5 0 8 0
filepl 152 4650 0 4386 20 5 15 17 0 8 4
lockfpl 104 130 0 128 1 0 1 1 0 8 0
lockfspl 48 58 0 56 1 0 1 1 0 8 0
sessionpl 144 26 0 15 1 0 1 1 0 8 0
pgrppl 48 38 0 19 1 0 1 1 0 8 0
ucredpl 104 569 0 556 1 0 1 1 0 8 0
zombiepl 144 916 0 915 2 1 1 1 0 8 0
processpl 1168 817 0 763 5 1 4 5 0 8 0
procpl 656 1481 0 1417 6 0 6 6 0 8 0
srpgc 96 8 0 8 1 0 1 1 0 8 1
sosppl 168 1 0 1 1 1 0 1 0 8 0
sockpl 688 1251 0 1180 15 8 7 10 0 8 0
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 11 0 0 2 0 2 2 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 11 0 0 2 0 2 2 0 8 0
mcl4k 4096 126 0 0 16 0 16 16 0 8 0
mcl2k 2048 20 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 233 0 0 15 0 15 15 0 8 0
bufpl 280 3364 0 137 231 0 231 231 0 8 0
anonpl 24 104088 0 100125 36 10 26 33 0 184 0
amapchunkpl 152 19741 0 19200 29 6 23 27 0 158 1
amappl16 200 1145 0 1109 4 1 3 3 0 8 0
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 118 0 104 1 0 1 1 0 8 0
amappl13 176 1 0 1 1 1 0 1 0 8 0
amappl12 168 1435 0 1401 4 1 3 3 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 5 0 4 2 1 1 1 0 8 0
amappl9 144 256 0 256 1 1 0 1 0 8 0
amappl8 136 20 0 17 1 0 1 1 0 8 0
amappl7 128 106 0 91 1 0 1 1 0 8 0
amappl6 120 173 0 168 1 0 1 1 0 8 0
amappl5 112 128 0 118 1 0 1 1 0 8 0
amappl4 104 325 0 306 1 0 1 1 0 8 0
amappl3 96 3840 0 3716 4 0 4 4 0 8 0
amappl2 88 665 0 592 2 0 2 2 0 8 0
amappl1 80 9799 0 9046 18 0 18 18 0 8 1
amappl 88 6018 0 5832 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 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 15 0 2 1 0 1 1 0 8 0
uaddrrnd 24 797 0 763 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 797 0 763 1 0 1 1 0 8 0
vmmpekpl 168 8413 0 8365 3 0 3 3 0 8 0
vmmpepl 168 53669 0 51464 110 9 101 101 0 357 2
vmsppl 456 796 0 763 6 1 5 5 0 8 0
rwobjpl 64 19074 0 15321 62 0 62 62 0 8 0
pdppl 4096 1602 0 1526 113 35 78 86 0 8 2
pvpl 32 13478 0 0 109 0 109 109 0 265 0
pmappl 248 796 0 763 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 312 0 51 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x786320b45560, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029a9bff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline]
acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120
comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(30) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833e07a1) at db_printf+0x9b
fault(ffffffff8337e9c3) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80003a0ce610,ffff8000014d102a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80003a0ce610) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0xffff80003a0ce740, count: 0
ddb{1}> trace
x86_ipi_db(ffff800029a9bff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline]
acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120
comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(30) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833e07a1) at db_printf+0x9b
fault(ffffffff8337e9c3) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80003a0ce610,ffff8000014d102a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80003a0ce610) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
arp_rtrequest(ffff800000039058,1,fffffd806bb89a88) at arp_rtrequest+0x670 arprequest sys/netinet/if_ether.c:281 [inline]
arp_rtrequest(ffff800000039058,1,fffffd806bb89a88) at arp_rtrequest+0x670 sys/netinet/if_ether.c:184
rtrequest(1,ffff80003a0ce8f0,0,ffff80003a0ce870,0) at rtrequest+0xc3c sys/net/route.c:1120
rtm_output(ffff800001483700,ffff80003a0ce998,ffff80003a0ce8f0,0,0) at rtm_output+0x877 sys/net/rtsock.c:973
route_output(fffffd8079930900,ffff800010fd8b18) at route_output+0x9a1 sys/net/rtsock.c:878
route_send(ffff800010fd8b18,fffffd8079930900,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(ffff800010fd8b18,0,ffff80003a0ceb38,0,0,802) at sosend+0x804
sendit(ffff80002f8a1c58,4,ffff80003a0cec30,802,ffff80003a0cece0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendto(ffff80002f8a1c58,ffff80003a0ced90,ffff80003a0cece0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
syscall(ffff80003a0ced90) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a0ced90) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x97f8cad8480, count: -24
---
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#syz undup
syzbot found the following issue on:
HEAD commit: 8d2464095911 It is important that we map memory with the r..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15824f18580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=a157c6e0d81b4f6b71a4
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c82b14a3555e/disk-8d246409.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a418f893f346/bsd-8d246409.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/40a5e6830236/kernel-8d246409.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a157c6...@syzkaller.appspotmail.com
*cpu1: uvm_fault(0xffffffff838a5888, 0xffff8000014d102a, 0, 1) -> e
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x786320b45560, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff8000310aab40
rbx 0
rdx 0
rcx 0xffff80002f8a02b8
rax 0x32
r8 0xffff8000310aaa70
r9 0x2080713 __kernel_phys_base+0x1080713
r10 0x67a55369c0332ba
r11 0xccd6bc351209813c
r12 0
r13 0
r14 0xffff80002f8a02b8
r15 0
rip 0xffffffff82b2c3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff8000310aaac0
ss 0
savectx+0xae: movl $0,%gs:0x680
ddb{0}> show proc
PROC (syz-executor) tid=370055 pid=87016 tcnt=4 stat=onproc
flags process=0 proc=0
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002f8a0cf8,0xffff80002f8a0038
process=0xffff80002f09bdc8 user=0xffff8000310a5000, vmspace=0xfffffd8064a21910
estcpu=36, cpticks=3, pctcpu=0.0, user=3, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
48337 464933 84257 0 2 0 syz-executor
48337 367593 84257 0 3 0x4000080 fsleep syz-executor
71570 521744 23075 0 2 0 syz-executor
71570 469476 23075 0 3 0x4000080 fsleep syz-executor
*87016 370055 86335 0 7 0 syz-executor
87016 481249 86335 0 7 0x4000000 syz-executor
87016 306610 86335 0 2 0x4000000 syz-executor
87016 239556 86335 0 2 0x4000000 syz-executor
29920 442865 98815 0 2 0 syz-executor
29920 352235 98815 0 3 0x4000080 sbwait syz-executor
31484 101045 20973 0 2 0 syz-executor
31484 254584 20973 0 3 0x4000000 smrbar syz-executor
84776 117085 8884 0 2 0 syz-executor
84776 104803 8884 0 3 0x4000080 fsleep syz-executor
84776 30198 8884 0 3 0x4000080 fsleep syz-executor
16244 142451 58719 0 2 0 syz-executor
16244 343547 58719 0 3 0x4000080 fsleep syz-executor
82871 464561 0 0 3 0x14200 acct acct
25309 16572 64657 0 3 0x82 sbwait sshd-session
99626 230862 64657 0 3 0x82 sbwait sshd-session
34328 387300 0 0 3 0x14200 bored sosplice
58719 445308 52747 0 3 0x82 nanoslp syz-executor
84257 108906 52747 0 3 0x82 nanoslp syz-executor
86335 298375 52747 0 3 0x82 nanoslp syz-executor
23075 332316 52747 0 3 0x82 nanoslp syz-executor
95218 172388 52747 0 3 0x82 wait syz-executor
98815 164646 52747 0 3 0x82 nanoslp syz-executor
8884 339083 52747 0 3 0x82 nanoslp syz-executor
20973 490526 52747 0 3 0x82 nanoslp syz-executor
52747 76055 69655 0 3 0x82 kqread syz-executor
69655 323595 75528 0 3 0x10008a sigsusp ksh
75528 142191 44977 0 3 0x98 kqread sshd-session
44977 181254 64657 0 3 0x92 kqread sshd-session
81238 444316 1 0 3 0x100083 ttyin getty
64657 144277 1 0 3 0x88 kqread sshd
78763 180435 5585 74 3 0x1100092 bpf pflogd
5585 326251 1 0 3 0x80 sbwait pflogd
33018 141350 87765 73 3 0x1100090 kqread syslogd
87765 507902 1 0 3 0x100082 sbwait syslogd
9496 51285 1 0 3 0x100080 kqread resolvd
68457 268593 54496 77 3 0x100092 kqread dhcpleased
19157 186326 54496 77 3 0x100092 kqread dhcpleased
54496 62304 1 0 3 0x80 kqread dhcpleased
9725 516434 0 0 3 0x14200 bored smr
68484 332645 0 0 2 0x14200 zerothread
32015 305598 0 0 3 0x14200 aiodoned aiodoned
40810 86019 0 0 3 0x14200 syncer update
8038 287752 0 0 3 0x14200 cleaner cleaner
40493 425643 0 0 3 0x14200 reaper reaper
97934 133777 0 0 3 0x14200 pgdaemon pagedaemon
65725 54509 0 0 3 0x14200 bored viomb
40413 63515 0 0 3 0x40014200 acpi0 acpi0
10701 460659 0 0 3 0x40014200 idle1
33707 303153 0 0 3 0x14200 bored softnet3
7374 299028 0 0 3 0x14200 bored softnet2
32153 373637 0 0 3 0x14200 bored softnet1
8977 351697 0 0 3 0x14200 bored softnet0
77631 306400 0 0 2 0x14200 systqmp
17271 289628 0 0 3 0x14200 bored systq
65880 335632 0 0 3 0x14200 tmoslp softclockmp
33111 505423 0 0 3 0x40014200 tmoslp softclock
94905 431311 0 0 3 0x40014200 idle0
1 420221 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &sched_lock r = 0 (0xffffffff838962a0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 yield+0x35 sys/kern/sched_bsd.c:317
#4 pool_get+0x265 sys/kern/subr_pool.c:593
#5 namei+0xdf sys/kern/vfs_lookup.c:145
#6 vn_open+0x13f sys/kern/vfs_vnops.c:140
#7 doopenat+0x32e sys/kern/vfs_syscalls.c:1133
#8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002f8a1c58 (481249)
exclusive rwlock netlock r = 0 (0xffffffff837c0b08)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rtm_output+0x78d sys/net/rtsock.c:969
#3 route_output+0x9a1 sys/net/rtsock.c:878
#4 route_send+0xd7 sys/net/rtsock.c:342
#5 sosend+0x804
#6 sendit+0x721 sys/kern/uipc_syscalls.c:779
#7 sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
#8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff800010fd8cd8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 sblock+0xb7 sys/kern/uipc_socket2.c:537
#3 sosend+0x2e2 sys/kern/uipc_socket.c:631
#4 sendit+0x721 sys/kern/uipc_syscalls.c:779
#5 sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
#6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002f8a1218 (306610)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e0228)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 doopenat+0x314 sys/kern/vfs_syscalls.c:1133
#2 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#2 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#3 Xsyscall+0x128
Process 87016 (syz-executor) thread 0xffff80002a3322b0 (239556)
exclusive rwlock vmmaplk r = 0 (0xfffffd8064a21a10)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250
#3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858
#4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline]
#4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774
#5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668
#6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
#7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
#8 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10198 11027K 11366K 166960K 11862 0
pcb 17 12K 12K 166960K 80 0
rtable 178 5K 7K 166960K 419 0
pf 36 18K 18K 166960K 72 0
ifaddr 35 5K 7K 166960K 58 0
ifgroup 49 2K 2K 166960K 79 0
sysctl 1 1K 1K 166960K 1 0
counters 64 36K 36K 166960K 86 0
ioctlops 0 0K 4K 166960K 1525 0
iov 0 0K 14K 166960K 23 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1422 89K 90K 166960K 1711 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 52 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 513 0
sigio 0 0K 0K 166960K 5 0
proc 72 91K 140K 166960K 581 0
subproc 72 4K 4K 166960K 73 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 45 0
in_multi 76 5K 7K 166960K 119 0
ether_multi 1 0K 0K 166960K 2 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 85 387K 387K 166960K 85 0
exec 0 0K 1K 166960K 446 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 252 74K 78K 166960K 6418 0
UVM aobj 14 4K 4K 166960K 16 0
pinsyscall 47 94K 104K 166960K 1611 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 13 0
NDP 11 0K 2K 166960K 37 0
temp 46 8636K 8767K 166960K 14084 0
kqueue 14 22K 28K 166960K 87 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 85 0 49 2 0 2 2 0 8 0
rtentry 168 136 0 56 5 0 5 5 0 8 0
unpcb 144 503 0 482 3 1 2 2 0 8 1
syncache 336 7 0 7 4 3 1 1 0 8 1
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 808 167 0 156 5 3 2 5 0 8 0
arp 120 29 0 13 1 0 1 1 0 8 0
inpcb 376 650 0 636 12 8 4 9 0 8 2
nd6 136 25 0 6 1 0 1 1 0 8 0
pkpcb 40 6 0 6 3 2 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1168 8 0 6 3 2 1 1 0 8 0
pppxif 1472 1 0 1 1 1 0 1 0 8 0
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrent 40 1 0 1 1 1 0 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
pfstitem 24 42 0 15 1 0 1 1 0 8 0
pfstkey 128 59 0 32 2 0 2 2 0 8 0
pfstate 376 58 0 31 5 0 5 5 0 8 0
pfrule 1344 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 256 538 0 181 30 1 29 30 0 8 2
art_table 32 539 0 181 4 0 4 4 0 8 0
art_node 16 135 0 67 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 8 2 1 1 1 0 8 1
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 50 0 40 1 0 1 1 0 8 0
shmpl 112 13 0 2 1 0 1 1 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 2279 0 771 95 0 95 95 0 8 0
ffsino 280 2279 0 771 109 0 109 109 0 8 0
nchpl 144 3042 0 1353 63 0 63 63 0 8 0
rtmask 32 1 0 1 1 1 0 1 0 8 0
uvmvnodes 80 2588 0 0 53 0 53 53 0 8 0
vnodes 216 2588 0 0 144 0 144 144 0 8 0
namei 1024 9680 0 9679 5 4 1 2 0 8 0
percpumem 16 57 0 11 1 0 1 1 0 8 0
kstatmem 264 40 0 18 2 0 2 2 0 8 0
scsiplug 72 2 0 2 2 2 0 1 0 8 0
scxspl 216 9731 0 9731 10 3 7 8 1 8 7
plimitpl 152 84 0 66 1 0 1 1 0 8 0
sigapl 424 817 0 763 8 1 7 7 0 8 0
futexpl 64 5880 0 5875 1 0 1 1 0 8 0
knotepl 120 529 0 0 17 0 17 17 0 8 0
kqueuepl 216 198 0 187 3 0 3 3 0 8 2
pipepl 328 195 0 166 8 2 6 8 0 8 3
fdescpl 504 797 0 763 5 0 5 5 0 8 0
filepl 152 4650 0 4386 20 5 15 17 0 8 4
lockfpl 104 130 0 128 1 0 1 1 0 8 0
lockfspl 48 58 0 56 1 0 1 1 0 8 0
sessionpl 144 26 0 15 1 0 1 1 0 8 0
pgrppl 48 38 0 19 1 0 1 1 0 8 0
ucredpl 104 569 0 556 1 0 1 1 0 8 0
zombiepl 144 916 0 915 2 1 1 1 0 8 0
processpl 1168 817 0 763 5 1 4 5 0 8 0
procpl 656 1481 0 1417 6 0 6 6 0 8 0
srpgc 96 8 0 8 1 0 1 1 0 8 1
sosppl 168 1 0 1 1 1 0 1 0 8 0
sockpl 688 1251 0 1180 15 8 7 10 0 8 0
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 11 0 0 2 0 2 2 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 11 0 0 2 0 2 2 0 8 0
mcl4k 4096 126 0 0 16 0 16 16 0 8 0
mcl2k 2048 20 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 233 0 0 15 0 15 15 0 8 0
bufpl 280 3364 0 137 231 0 231 231 0 8 0
anonpl 24 104088 0 100125 36 10 26 33 0 184 0
amapchunkpl 152 19741 0 19200 29 6 23 27 0 158 1
amappl16 200 1145 0 1109 4 1 3 3 0 8 0
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 118 0 104 1 0 1 1 0 8 0
amappl13 176 1 0 1 1 1 0 1 0 8 0
amappl12 168 1435 0 1401 4 1 3 3 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 5 0 4 2 1 1 1 0 8 0
amappl9 144 256 0 256 1 1 0 1 0 8 0
amappl8 136 20 0 17 1 0 1 1 0 8 0
amappl7 128 106 0 91 1 0 1 1 0 8 0
amappl6 120 173 0 168 1 0 1 1 0 8 0
amappl5 112 128 0 118 1 0 1 1 0 8 0
amappl4 104 325 0 306 1 0 1 1 0 8 0
amappl3 96 3840 0 3716 4 0 4 4 0 8 0
amappl2 88 665 0 592 2 0 2 2 0 8 0
amappl1 80 9799 0 9046 18 0 18 18 0 8 1
amappl 88 6018 0 5832 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 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 15 0 2 1 0 1 1 0 8 0
uaddrrnd 24 797 0 763 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 797 0 763 1 0 1 1 0 8 0
vmmpekpl 168 8413 0 8365 3 0 3 3 0 8 0
vmmpepl 168 53669 0 51464 110 9 101 101 0 357 2
vmsppl 456 796 0 763 6 1 5 5 0 8 0
rwobjpl 64 19074 0 15321 62 0 62 62 0 8 0
pdppl 4096 1602 0 1526 113 35 78 86 0 8 2
pvpl 32 13478 0 0 109 0 109 109 0 265 0
pmappl 248 796 0 763 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 312 0 51 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x786320b45560, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029a9bff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline]
acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120
comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(30) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833e07a1) at db_printf+0x9b
fault(ffffffff8337e9c3) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80003a0ce610,ffff8000014d102a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80003a0ce610) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0xffff80003a0ce740, count: 0
ddb{1}> trace
x86_ipi_db(ffff800029a9bff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline]
acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120
comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(30) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833e07a1) at db_printf+0x9b
fault(ffffffff8337e9c3) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80003a0ce610,ffff8000014d102a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80003a0ce610) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
arp_rtrequest(ffff800000039058,1,fffffd806bb89a88) at arp_rtrequest+0x670 arprequest sys/netinet/if_ether.c:281 [inline]
arp_rtrequest(ffff800000039058,1,fffffd806bb89a88) at arp_rtrequest+0x670 sys/netinet/if_ether.c:184
rtrequest(1,ffff80003a0ce8f0,0,ffff80003a0ce870,0) at rtrequest+0xc3c sys/net/route.c:1120
rtm_output(ffff800001483700,ffff80003a0ce998,ffff80003a0ce8f0,0,0) at rtm_output+0x877 sys/net/rtsock.c:973
route_output(fffffd8079930900,ffff800010fd8b18) at route_output+0x9a1 sys/net/rtsock.c:878
route_send(ffff800010fd8b18,fffffd8079930900,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(ffff800010fd8b18,0,ffff80003a0ceb38,0,0,802) at sosend+0x804
sendit(ffff80002f8a1c58,4,ffff80003a0cec30,802,ffff80003a0cece0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendto(ffff80002f8a1c58,ffff80003a0ced90,ffff80003a0cece0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
syscall(ffff80003a0ced90) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a0ced90) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x97f8cad8480, count: -24
---
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