uvm_faultuvm_fault(0xffffffff83a4f8f8, 0xffff800029ef6000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*100267 13433 0 0x2 0x1 0 syz-executor
kcov_remote_enter(0,ffff80002a7af190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff838c8790,ffff80002a746868) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a746868,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(74) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(74) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff833b92a9) at db_printf+0x9b sys/kern/subr_prf.c:-1
fault(ffffffff83476b0a) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161
kpageflttrap(ffff80002a85f0e0,ffff800029b92028) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296
kerntrap(ffff80002a85f0e0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528
end trace frame: 0xffff80002a85f160, count: 0
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xffffffff83a4f8f8, 0xffff800029ef6000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff80002a7af190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff838c8790,ffff80002a746868) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a746868,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(74) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(74) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff833b92a9) at db_printf+0x9b sys/kern/subr_prf.c:-1
fault(ffffffff83476b0a) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161
kpageflttrap(ffff80002a85f0e0,ffff800029b92028) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296
kerntrap(ffff80002a85f0e0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ffs2_balloc(fffffd806f134b00,467f8,50,fffffd8007ffd750,1,ffff80002a85f358) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614
ffs_write(ffff80002a85f3e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd807ad37da0,ffff80002a85f490,3,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002a746008,fffffd807ad37da0,fffffd8007ffd750,ffff80002a85f560,ffff80002a85f540) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691
ktrsysret(ffff80002a746008,5b,0,ffff80002a85f620) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a746008,5b,0,ffff80002a85f620) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff80002a85f6d0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a85f6d0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7825a42d5b70, count: -22
ddb> show registers
rdi 0
rsi 0xffff800000c16c00
rbp 0xffff80002a85eb70
rbx 0xffff80002a7af190
rdx 0xffff80002a746008
rcx 0xffff800029ef6000
rax 0xfffffd806cd18d80
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbc4080d61d0dba98
r11 0xfd4f8809231374fd
r12 0xffffffff82de90c0 endtsleep
r13 0xffff80002a7467d0
r14 0xffff80002a7af190
r15 0
rip 0xffffffff818c8122 kcov_remote_enter+0x122
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff80002a85eb50
ss 0x10
kcov_remote_enter+0x122: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor) tid=100267 pid=13433 tcnt=1 stat=onproc
flags process=2<EXEC> proc=1<INKTR>
runpri=32, usrpri=64, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a777c98,0xffff80002a7467e0
process=0xffff80002a7aed10 user=0xffff80002a85a000, vmspace=0xfffffd806fb01178
estcpu=14, cpticks=8, pctcpu=0.1, user=0, sys=7, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
68090 260893 11817 0 2 0 syz-executor
68090 511844 11817 0 2 0x4000000 syz-executor
506 365284 27776 0 3 0x80 nanoslp syz-executor
506 280421 27776 0 3 0x4000080 kqread syz-executor
506 337363 27776 0 3 0x4000080 fsleep syz-executor
506 336231 27776 0 3 0x4000080 fsleep syz-executor
19696 44876 21940 0 2 0xc80 syz-executor
19696 228020 21940 0 2 0x4000c80 syz-executor
6274 201567 71914 0 3 0x80 nanoslp syz-executor
6274 393822 71914 0 3 0x4000080 sbwait syz-executor
28494 345683 31926 60928 3 0x90 nanoslp syz-executor
28494 166717 31926 60928 3 0x4000090 lockf syz-executor
28494 367306 31926 60928 3 0x4000090 fsleep syz-executor
46756 255377 1 0 3 0x82 nanoslp getty
11817 488689 70159 0 3 0x82 nanoslp syz-executor
72163 277862 77372 60929 3 0x3010 suspend syz-executor
72163 362849 77372 60929 2 0x4081010 syz-executor
33674 50146 0 0 3 0x14200 acct acct
27776 12201 70159 0 2 0xc82 syz-executor
31926 109948 70159 0 3 0x82 nanoslp syz-executor
77372 130147 70159 0 3 0x82 nanoslp syz-executor
*13433 100267 70159 0 7 0x3 syz-executor
88601 354079 70159 0 3 0x82 wait syz-executor
21940 517090 70159 0 3 0x82 nanoslp syz-executor
71914 57867 70159 0 3 0x82 nanoslp syz-executor
70159 201818 1 0 3 0x82 kqread syz-executor
79076 325321 0 0 3 0x14200 bored smr
33704 321210 0 0 2 0x14200 zerothread
63380 38525 0 0 3 0x14200 aiodoned aiodoned
18791 126822 0 0 3 0x14200 syncer update
1734 62055 0 0 3 0x14200 cleaner cleaner
81689 457428 0 0 3 0x14200 reaper reaper
15103 273237 0 0 3 0x14200 pgdaemon pagedaemon
55421 243687 0 0 3 0x14200 bored viomb
68837 285601 0 0 3 0x40014200 acpi0 acpi0
85203 307765 0 0 3 0x14200 bored softnet0
33749 428453 0 0 3 0x14200 bored systqmp
97819 112031 0 0 3 0x14200 bored systq
54505 45504 0 0 3 0x40014200 tmoslp softclock
49974 207772 0 0 3 0x40014200 idle0
1 103232 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11033 12221K 13328K 166960K 12754 0
pcb 17 13K 14K 166960K 117 0
rtable 225 6K 6K 166960K 420 0
pf 32 13K 19K 166960K 57 0
ifaddr 38 6K 7K 166960K 54 0
ifgroup 46 2K 2K 166960K 67 0
sysctl 3 1K 9K 166960K 43 0
counters 32 17K 17K 166960K 38 0
ioctlops 0 0K 4K 166960K 157 0
iov 0 0K 12K 166960K 17 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1424 90K 90K 166960K 1763 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 7 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 18 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 65K 236K 166960K 425 0
sigio 0 0K 0K 166960K 12 0
proc 20 25K 116K 166960K 570 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 14 0
in_multi 88 6K 7K 166960K 110 0
ether_multi 1 0K 0K 166960K 1 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 407 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 151 83K 176K 166960K 5349 0
UVM aobj 9 2K 2K 166960K 10 0
pinsyscall 20 40K 96K 166960K 1523 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 1 0K 0K 166960K 12 0
NDP 10 0K 1K 166960K 34 0
temp 49 9068K 9156K 166960K 18804 0
kqueue 4 8K 30K 166960K 87 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 59 0 59 1 0 1 1 0 8 1
rtentry 136 127 0 26 4 0 4 4 0 8 0
unpcb 144 180 0 178 1 0 1 1 0 8 0
syncache 336 4 0 4 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 84 0 82 2 0 2 2 0 8 1
arp 96 21 0 5 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 2 0 1 1 0 1 1 0 8 0
inpcb 328 287 0 283 4 0 4 4 0 8 2
nd6 112 27 0 6 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 1 1 0 8 1
kcovpl 48 9 0 1 1 0 1 1 0 8 0
ppxss 1072 2 0 2 1 0 1 1 0 8 1
pffrag 232 36 0 32 1 0 1 1 0 482 0
pffrnode 88 36 0 32 1 0 1 1 0 8 0
pffrent 40 70 0 66 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 320 2 0 0 1 0 1 1 0 8 0
pfstitem 24 1 0 0 1 0 1 1 0 8 0
pfstkey 128 3 0 2 1 0 1 1 0 8 0
pfstate 384 2 0 1 1 0 1 1 0 8 0
pfrule 1360 2 0 2 1 0 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 499 0 90 29 0 29 29 0 8 3
art_table 40 501 0 90 5 0 5 5 0 8 0
art_node 32 127 0 35 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 15 0 5 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 2063 0 590 93 0 93 93 0 8 0
ffsino 256 2063 0 590 93 0 93 93 0 8 0
nchpl 144 2632 0 928 64 0 64 64 0 8 0
vnodes 216 2460 0 0 137 0 137 137 0 8 0
namei 1024 8900 0 8900 2 0 2 2 0 8 2
kstatmem 264 32 0 12 2 0 2 2 0 8 0
scsiplug 72 4 0 4 1 0 1 1 0 8 1
scxspl 216 13765 0 13765 8 0 8 8 1 8 8
plimitpl 152 176 0 162 1 0 1 1 0 8 0
sigapl 424 701 0 667 6 0 6 6 0 8 1
knotepl 120 14113 0 14089 17 0 17 17 0 8 15
kqueuepl 184 175 0 171 4 0 4 4 0 8 3
pipepl 304 256 0 227 5 0 5 5 0 8 2
fdescpl 448 687 0 667 5 0 5 5 0 8 1
filepl 120 3741 0 3564 11 0 11 11 0 8 3
lockfpl 104 209 0 206 1 0 1 1 0 8 0
lockfspl 48 60 0 58 1 0 1 1 0 8 0
sessionpl 144 34 0 32 1 0 1 1 0 8 0
pgrppl 48 48 0 38 1 0 1 1 0 8 0
ucredpl 104 384 0 379 1 0 1 1 0 8 0
zombiepl 144 670 0 667 1 0 1 1 0 8 0
processpl 1152 701 0 667 4 0 4 4 0 8 0
procpl 664 1124 0 1081 6 0 6 6 0 8 1
sosppl 176 1 0 1 1 0 1 1 0 8 1
sockpl 552 540 0 534 4 0 4 4 0 8 2
mcl64k 65536 12 0 10 1 0 1 1 0 8 0
mcl16k 16384 2 0 2 1 0 1 1 0 8 1
mcl8k 8192 5 0 5 1 0 1 1 0 8 1
mcl4k 4096 2889 0 2839 13 0 13 13 0 8 6
mcl2k 2048 486 0 481 3 0 3 3 0 8 1
mtagpl 96 8 0 4 1 0 1 1 0 8 0
mbufpl 256 6886 0 6758 15 0 15 15 0 8 3
bufpl 280 6394 0 180 444 0 444 444 0 8 0
anonpl 24 140081 0 134241 64 0 64 64 0 187 18
amapchunkpl 152 17209 0 16787 29 0 29 29 0 158 8
amappl16 200 2447 0 2186 15 0 15 15 0 8 0
amappl15 192 7 0 7 1 0 1 1 0 8 1
amappl14 184 417 0 417 1 0 1 1 0 8 1
amappl13 176 118 0 116 1 0 1 1 0 8 0
amappl12 168 929 0 910 2 0 2 2 0 8 0
amappl11 160 33 0 33 1 0 1 1 0 8 1
amappl10 152 160 0 160 1 0 1 1 0 8 1
amappl9 144 275 0 274 1 0 1 1 0 8 0
amappl8 136 101 0 101 1 0 1 1 0 8 1
amappl7 128 145 0 142 1 0 1 1 0 8 0
amappl6 120 169 0 169 1 0 1 1 0 8 1
amappl5 112 99 0 98 1 0 1 1 0 8 0
amappl4 104 267 0 265 1 0 1 1 0 8 0
amappl3 96 3151 0 3061 4 0 4 4 0 8 0
amappl2 88 527 0 517 2 0 2 2 0 8 0
amappl1 80 10767 0 10645 16 0 16 16 0 8 8
amappl 88 4555 0 4419 5 0 5 5 0 92 0
uvmvnodes 80 113 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 0 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 0 1 1 0 8 1
dma128 128 254 0 254 1 0 1 1 0 8 1
dma64 64 7 0 7 1 0 1 1 0 8 1
dma32 32 7 0 7 1 0 1 1 0 8 1
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 24 687 0 667 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 687 0 667 1 0 1 1 0 8 0
vmmpekpl 168 7507 0 7470 2 0 2 2 0 8 0
vmmpepl 168 51986 0 50833 93 0 93 93 0 357 28
vmsppl 368 686 0 667 4 0 4 4 0 8 1
rwobjpl 40 17129 0 16431 13 0 13 13 0 8 0
pdppl 4096 1380 0 1334 104 38 66 82 0 8 20
pvpl 32 339444 0 330222 133 0 133 133 0 265 34
pmappl 216 686 0 667 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 376 0 38 10 0 10 10 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff80002a7af190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff838c8790,ffff80002a746868) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a746868,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(74) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(74) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff833b92a9) at db_printf+0x9b sys/kern/subr_prf.c:-1
fault(ffffffff83476b0a) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161
kpageflttrap(ffff80002a85f0e0,ffff800029b92028) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296
kerntrap(ffff80002a85f0e0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ffs2_balloc(fffffd806f134b00,467f8,50,fffffd8007ffd750,1,ffff80002a85f358) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614
ffs_write(ffff80002a85f3e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd807ad37da0,ffff80002a85f490,3,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002a746008,fffffd807ad37da0,fffffd8007ffd750,ffff80002a85f560,ffff80002a85f540) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691
ktrsysret(ffff80002a746008,5b,0,ffff80002a85f620) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a746008,5b,0,ffff80002a85f620) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff80002a85f6d0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a85f6d0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7825a42d5b70, count: -22
ddb>