login: kernel: protection fault trap, code=0
Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:649 [inline]
sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:359
syscall(ffff80002af38510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002af38510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa8290d8120, count: -3
ddb{1}> show registers
rdi 0x106e __ALIGN_SIZE+0x6e
rsi 0x200013c8
rbp 0xffff80002af38430
rbx 0x106e __ALIGN_SIZE+0x6e
rdx 0
rcx 0
rax 0xffff8000fffefa48
r8 0x7f7fffffc000
r9 0x1
r10 0xe800e94b9b4a95c
r11 0xb6f473f1d535dac3
r12 0xfffffd8062f10bb8
r13 0xdeadbeefdeadbeef
r14 0xffff800000c35700
r15 0x1c0
rip 0xffffffff823d1ecf sys_msgrcv+0x2df
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff80002af383a0
ss 0
sys_msgrcv+0x2df: movq 0x10(%r13),%rdi
ddb{1}> show proc
PROC (syz-executor.6) pid=318481 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=36, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000fffeea88,0xffff8000fffeed38
process=0xffff8000fffea588 user=0xffff80002af33000, vmspace=0xfffffd8065c012f8
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
77150 251624 52135 32767 3 0x90 nanoslp syz-executor.4
77150 354080 52135 32767 3 0x4000090 netcon2 syz-executor.4
77150 36099 52135 32767 3 0x4000090 fsleep syz-executor.4
77150 111988 52135 32767 3 0x4000090 fsleep syz-executor.4
67744 27739 81197 32767 3 0x90 nanoslp syz-executor.6
67744 226256 81197 32767 3 0x4000090 fsleep syz-executor.6
*67744 318481 81197 32767 7 0x4000010 syz-executor.6
67744 229891 81197 32767 2 0x4000010 syz-executor.6
67744 156721 81197 32767 2 0x4000010 syz-executor.6
67744 340311 81197 32767 2 0x4000010 syz-executor.6
67744 145878 81197 32767 7 0x4000010 syz-executor.6
32746 301353 34414 32767 3 0x90 nanoslp syz-executor.3
32746 318190 34414 32767 3 0x4000090 fsleep syz-executor.3
32746 63017 34414 32767 3 0x4000090 netcon syz-executor.3
32746 59079 34414 32767 3 0x4000090 fsleep syz-executor.3
91227 169024 0 0 3 0x14200 bored sosplice
20393 246787 31248 32767 3 0x90 piperd syz-executor.5
61600 298340 46164 32767 3 0x90 piperd syz-executor.7
52135 126670 34200 32767 3 0x90 nanoslp syz-executor.4
81197 485120 99521 32767 3 0x90 nanoslp syz-executor.6
46164 219706 49208 0 3 0x82 wait syz-executor.7
34414 289064 79088 32767 3 0x90 nanoslp syz-executor.3
31248 318419 49208 0 3 0x82 wait syz-executor.5
99521 464125 49208 0 3 0x82 wait syz-executor.6
34200 350776 49208 0 3 0x82 wait syz-executor.4
39927 424935 91674 32767 3 0x90 piperd syz-executor.2
79088 285688 49208 0 3 0x82 wait syz-executor.3
91674 75427 49208 0 3 0x82 wait syz-executor.2
56055 156510 25330 32767 3 0x90 piperd syz-executor.1
25330 34305 49208 0 3 0x82 wait syz-executor.1
86027 347740 88670 32767 3 0x90 piperd syz-executor.0
88670 163746 49208 0 3 0x82 wait syz-executor.0
49208 432708 88715 0 3 0x82 thrsleep syz-fuzzer
49208 263866 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 519988 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 195931 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 419563 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 348019 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 356436 88715 0 3 0x4000082 kqread syz-fuzzer
49208 350009 88715 0 3 0x4000082 thrsleep syz-fuzzer
49208 151753 88715 0 3 0x4000082 thrsleep syz-fuzzer
88715 406851 57555 0 3 0x10008a sigsusp ksh
57555 365154 55777 0 3 0x9a kqread sshd
20145 351324 1 0 3 0x100083 ttyin getty
55777 204928 1 0 3 0x88 kqread sshd
36379 141916 79529 73 3 0x1100090 kqread syslogd
79529 147105 1 0 3 0x100082 netio syslogd
91740 148106 1 0 3 0x100080 kqread resolvd
32521 138398 71122 77 3 0x100092 kqread dhcpleased
1041 269724 71122 77 3 0x100092 kqread dhcpleased
71122 145881 1 0 3 0x80 kqread dhcpleased
24271 355231 0 0 3 0x14200 bored smr
78222 262134 0 0 2 0x14200 zerothread
78147 69709 0 0 3 0x14200 aiodoned aiodoned
60615 23865 0 0 3 0x14200 syncer update
36773 145163 0 0 3 0x14200 cleaner cleaner
37335 295202 0 0 3 0x14200 reaper reaper
16912 51370 0 0 3 0x14200 pgdaemon pagedaemon
45148 392762 0 0 3 0x14200 bored viomb
87912 175213 0 0 3 0x40014200 acpi0 acpi0
32745 245051 0 0 3 0x40014200 idle1
94780 357121 0 0 3 0x14200 bored softnet
36978 195657 0 0 3 0x14200 bored systqmp
64256 511179 0 0 3 0x14200 bored systq
79119 34673 0 0 3 0x40014200 bored softclock
66637 168674 0 0 3 0x40014200 idle0
1 121421 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 67744 (syz-executor.6) thread 0xffff8000fffefa48 (318481)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ad20f0)
#0 witness_lock+0x44d
#1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x198 sys/kern/kern_synch.c:433
#4 rw_enter+0x35a sys/kern/kern_rwlock.c:286
#5 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758
#6 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674
#7 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#8 kpageflttrap+0x209
#9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318
#10 alltraps_kern_meltdown+0x7b
#11 copyout+0x53
#12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#13 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10174 6407K 6419K 78643K 11264 0
pcb 13 10K 12K 78643K 15 0
rtable 246 7K 7K 78643K 432 0
ifaddr 81 16K 16K 78643K 82 0
counters 56 35K 35K 78643K 56 0
ioctlops 0 0K 2K 78643K 107 0
iov 0 0K 16K 78643K 184 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1270 79K 79K 78643K 1308 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 11 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 191 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 21 77K 117K 78643K 891 0
sigio 0 0K 0K 78643K 10 0
proc 56 74K 111K 78643K 499 0
subproc 104 6K 6K 78643K 104 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 52 0
in_multi 99 6K 6K 78643K 126 0
ether_multi 1 0K 0K 78643K 10 0
mrt 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 61 281K 281K 78643K 61 0
exec 0 0K 2K 78643K 697 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 299 82K 91K 78643K 12923 0
UVM aobj 25 2K 2K 78643K 28 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 26 0
NDP 11 0K 2K 78643K 27 0
temp 121 4702K 4765K 78643K 5881 0
kqueue 12 18K 26K 78643K 98 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 48 0 45 1 0 1 1 0 8 0
rtentry 112 115 0 1 4 0 4 4 0 8 0
unpcb 136 528 0 515 5 4 1 5 0 8 0
syncache 296 15 0 15 3 2 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 308 0 293 10 6 4 8 0 8 2
arp 120 18 0 0 1 0 1 1 0 8 0
ipq 40 5 0 4 2 1 1 1 0 8 0
ipqe 40 180 0 179 2 1 1 1 0 8 0
inpcb 304 1418 0 1405 22 10 12 12 0 8 10
ip6q 72 2 0 2 1 1 0 1 0 8 0
ip6af 40 4 0 4 1 1 0 1 0 8 0
nd6 48 28 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 492 0 0 31 0 31 31 0 8 0
art_table 32 493 0 0 4 0 4 4 0 8 0
art_node 16 114 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 27 0 17 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 188 0 178 1 0 1 1 0 8 0
shmpl 112 25 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2368 0 938 90 0 90 90 0 8 0
ffsino 272 2368 0 938 96 0 96 96 0 8 0
nchpl 144 3770 0 2111 62 0 62 62 0 8 0
uvmvnodes 80 2481 0 0 51 0 51 51 0 8 0
vnodes 224 2481 0 0 146 0 146 146 0 8 0
namei 1024 11759 0 11759 2 1 1 2 0 8 1
percpumem 16 40 0 0 1 0 1 1 0 8 0
scxspl 216 10901 0 10901 9 8 1 8 0 8 1
plimitpl 152 92 0 70 1 0 1 1 0 8 0
sigapl 424 1167 0 1120 7 1 6 7 0 8 0
futexpl 64 7803 0 7798 1 0 1 1 0 8 0
knotepl 120 210 0 0 6 0 6 6 0 8 0
kqueuepl 216 123 0 115 1 0 1 1 0 8 0
pipepl 336 284 0 256 6 0 6 6 0 8 3
fdescpl 496 1152 0 1120 7 2 5 6 0 8 0
filepl 152 6627 0 6386 19 4 15 15 0 8 5
lockfpl 104 87 0 85 1 0 1 1 0 8 0
lockfspl 48 40 0 38 1 0 1 1 0 8 0
sessionpl 144 23 0 7 1 0 1 1 0 8 0
pgrppl 48 113 0 96 1 0 1 1 0 8 0
ucredpl 96 550 0 532 1 0 1 1 0 8 0
zombiepl 144 1120 0 1120 1 0 1 1 0 8 1
processpl 1064 1167 0 1120 5 1 4 4 0 8 0
procpl 672 2827 0 2760 8 1 7 8 0 8 0
sosppl 168 8 0 8 2 1 1 1 0 8 1
sockpl 480 2002 0 1973 54 33 21 21 0 8 16
mcl64k 65536 15 0 0 2 0 2 2 0 8 0
mcl16k 16384 6 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 8 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 1
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 146 0 0 18 0 18 18 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 419 0 0 26 0 26 26 0 8 0
bufpl 288 4804 0 141 334 0 334 334 0 8 0
anonpl 24 278763 0 265115 106 6 100 100 0 186 9
amapchunkpl 152 30599 0 29870 40 3 37 37 0 158 4
amappl16 200 2139 0 1771 21 1 20 20 0 8 0
amappl15 192 86 0 82 1 0 1 1 0 8 0
amappl14 184 122 0 114 1 0 1 1 0 8 0
amappl13 176 80 0 78 1 0 1 1 0 8 0
amappl12 168 319 0 312 1 0 1 1 0 8 0
amappl11 160 48 0 36 1 0 1 1 0 8 0
amappl10 152 121 0 116 1 0 1 1 0 8 0
amappl9 144 469 0 464 1 0 1 1 0 8 0
amappl8 136 876 0 813 3 0 3 3 0 8 0
amappl7 128 409 0 391 1 0 1 1 0 8 0
amappl6 120 193 0 173 2 1 1 2 0 8 0
amappl5 112 1008 0 986 1 0 1 1 0 8 0
amappl4 104 794 0 768 1 0 1 1 0 8 0
amappl3 96 530 0 513 1 0 1 1 0 8 0
amappl2 88 642 0 597 3 1 2 3 0 8 0
amappl1 80 23783 0 23187 18 3 15 18 0 8 0
amappl 88 12465 0 12236 7 0 7 7 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 27 0 3 1 0 1 1 0 8 0
uaddrrnd 24 1152 0 1120 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1152 0 1120 1 0 1 1 0 8 0
vmmpekpl 168 13912 0 13866 3 0 3 3 0 8 0
vmmpepl 168 107791 0 105389 124 1 123 123 0 357 4
vmsppl 368 1151 0 1120 4 0 4 4 0 8 0
rwobjpl 56 29275 0 25478 55 0 55 55 0 8 0
pdppl 4096 2311 0 2240 115 34 81 91 0 8 10
pvpl 32 586018 0 567499 242 27 215 242 0 265 52
pmappl 248 1151 0 1120 4 1 3 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 746 0 43 21 0 21 21 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff828f4ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82ad1ee8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82ad1ee8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
syscall(ffff80002e38abd0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline]
syscall(ffff80002e38abd0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa7a301c380, count: -6
ddb{0}> machine ddbcpu 1
Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi
ddb{1}> trace
sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:649 [inline]
sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:359
syscall(ffff80002af38510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002af38510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa8290d8120, count: -3