uvm_fault(0xffffffff82e86fb0, 0xffff80001c862000, 0, 2) -> d
kernel: page fault trap, code=2
Stopped at memset+0x52: repe stosq %es:(%rdi)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*365957 54393 0 0 0 0 syz-executor121655267
memset() at memset+0x52
VOP_WRITE(fffffd806d6da008,ffff80002a68b7b0,5,fffffd807f7d78f0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_write(fffffd806f97d690,ffff80002a68b7b0,1) at vn_write+0x1a0 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80002a5f7558,3,ffff80002a68b7b0,1,ffff80002a68b870) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_pwritev(ffff80002a5f7558,ffff80002a68b920,ffff80002a68b870) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3352
syscall(ffff80002a68b920) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d8ea6d887d0, count: 8
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(0xffffffff82e86fb0, 0xffff80001c862000, 0, 2) -> d
ddb> trace
memset() at memset+0x52
VOP_WRITE(fffffd806d6da008,ffff80002a68b7b0,5,fffffd807f7d78f0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_write(fffffd806f97d690,ffff80002a68b7b0,1) at vn_write+0x1a0 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80002a5f7558,3,ffff80002a68b7b0,1,ffff80002a68b870) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_pwritev(ffff80002a5f7558,ffff80002a68b920,ffff80002a68b870) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3352
syscall(ffff80002a68b920) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d8ea6d887d0, count: -7
ddb> show registers
rdi 0xffff80001c862000
rsi 0
rbp 0xffff80002a68b580
rbx 0xe
rdx 0
rcx 0x800
rax 0
r8 0x4000 __ALIGN_SIZE+0x3000
r9 0xffff80002a68b4f8
r10 0x5a499870ce4eed5
r11 0xffff80001c862000
r12 0x4000 __ALIGN_SIZE+0x3000
r13 0x4000 __ALIGN_SIZE+0x3000
r14 0xffff80001c862000
r15 0x4000 __ALIGN_SIZE+0x3000
rip 0xffffffff811e0032 memset+0x52
cs 0x8
rflags 0x10206 __ALIGN_SIZE+0xf206
rsp 0xffff80002a68b4b8
ss 0x10
memset+0x52: repe stosq %es:(%rdi)
ddb> show proc
PROC (syz-executor121655267) tid=365957 pid=54393 tcnt=1 stat=onproc
flags process=0 proc=0
runpri=32, usrpri=51, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff80002a5f62c0,0xffff80002a5f6d70
process=0xffff80002a603ab8 user=0xffff80002a686000, vmspace=0xfffffd806d3719b0
estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
24146 407532 12941 0 2 0 syz-executor121655267
4342 404944 97765 0 2 0 syz-executor121655267
39702 381700 39039 0 2 0 syz-executor121655267
75804 85728 12947 0 2 0 syz-executor121655267
16741 262755 5155 0 2 0 syz-executor121655267
*54393 365957 4816 0 7 0 syz-executor121655267
92851 429543 39930 0 2 0x80 syz-executor121655267
7258 408804 58342 0 2 0 syz-executor121655267
39930 468160 25315 0 2 0x480 syz-executor121655267
12941 236357 25315 0 2 0x480 syz-executor121655267
39039 124797 25315 0 2 0x480 syz-executor121655267
12947 76338 25315 0 2 0x480 syz-executor121655267
5155 397553 25315 0 2 0x480 syz-executor121655267
97765 518388 25315 0 2 0x480 syz-executor121655267
4816 276905 25315 0 2 0x480 syz-executor121655267
58342 253635 25315 0 2 0x480 syz-executor121655267
25315 282748 92512 0 3 0x82 nanoslp syz-executor121655267
92512 285573 19003 0 3 0x10008a sigsusp ksh
19003 304151 6922 0 3 0x9a kqread sshd
96559 51111 1 0 3 0x100083 ttyin getty
6922 467035 1 0 3 0x88 kqread sshd
12968 315655 93933 73 2 0x1100010 syslogd
93933 47088 1 0 3 0x100082 netio syslogd
61909 298144 1 0 3 0x100080 kqread resolvd
87575 522683 84825 77 3 0x100092 kqread dhcpleased
51482 524267 84825 77 3 0x100092 kqread dhcpleased
84825 446059 1 0 3 0x80 kqread dhcpleased
79596 368776 0 0 3 0x14200 bored smr
79996 487569 0 0 2 0x14200 zerothread
24142 330469 0 0 3 0x14200 aiodoned aiodoned
45677 69759 0 0 3 0x14200 syncer update
2148 437357 0 0 3 0x14200 cleaner cleaner
6284 376218 0 0 3 0x14200 reaper reaper
2552 292838 0 0 3 0x14200 pgdaemon pagedaemon
37587 302027 0 0 3 0x14200 bored viomb
23865 7012 0 0 3 0x40014200 acpi0 acpi0
85646 198265 0 0 3 0x14200 bored softnet3
90650 127883 0 0 3 0x14200 bored softnet2
60692 473758 0 0 3 0x14200 bored softnet1
51939 359195 0 0 2 0x14200 softnet0
39771 324456 0 0 3 0x14200 bored systqmp
70512 399103 0 0 3 0x14200 bored systq
56886 374886 0 0 3 0x40014200 tmoslp softclock
18589 488195 0 0 3 0x40014200 idle0
1 376423 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 10138 6382K 6413K 166960K 11216 0
pcb 15 10K 10K 166960K 15 0
rtable 58 1K 2K 166960K 110 0
pf 12 6K 6K 166960K 12 0
ifaddr 11 5K 5K 166960K 11 0
ifgroup 17 1K 1K 166960K 17 0
counters 22 16K 16K 166960K 22 0
ioctlops 0 0K 2K 166960K 21 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1174 73K 74K 166960K 1188 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 1K 166960K 2 0
VM map 2 1K 1K 166960K 2 0
sem 2 0K 0K 166960K 2 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 1 0K 0K 166960K 1 0
proc 55 58K 59K 166960K 246 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
in_multi 11 0K 0K 166960K 11 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 25 122K 122K 166960K 25 0
exec 0 0K 1K 166960K 243 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 101 6K 6K 166960K 2190 0
UVM aobj 3 2K 2K 166960K 3 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 3 0K 0K 166960K 3 0
temp 1 6748K 6812K 166960K 2780 0
kqueue 11 16K 18K 166960K 24 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 20 0 17 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 144 33 0 20 1 0 1 1 0 8 0
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpqe 32 134 0 134 1 0 1 1 0 8 1
tcpcb 808 8 0 5 1 0 1 1 0 8 0
arp 88 2 0 0 1 0 1 1 0 8 0
inpcb 360 26 0 20 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 96 0 0 6 0 6 6 0 8 0
art_table 32 97 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1423 0 37 87 0 87 87 0 8 0
ffsino 240 1423 0 37 82 0 82 82 0 8 0
nchpl 144 1607 0 47 58 0 58 58 0 8 0
uvmvnodes 80 1433 0 0 30 0 30 30 0 8 0
vnodes 216 1433 0 0 80 0 80 80 0 8 0
namei 1024 4281 0 4277 2 0 2 2 0 8 1
kstatmem 264 6 0 0 1 0 1 1 0 8 0
scxspl 216 5790 0 5790 3 0 3 3 1 8 3
plimitpl 152 16 0 10 1 0 1 1 0 8 0
sigapl 424 330 0 285 6 0 6 6 0 8 0
knotepl 120 3612 0 3583 2 0 2 2 0 8 1
kqueuepl 184 20 0 13 1 0 1 1 0 8 0
pipepl 288 87 0 84 1 0 1 1 0 8 0
fdescpl 432 314 0 285 4 0 4 4 0 8 0
filepl 120 1148 0 1085 2 0 2 2 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 104 68 0 57 1 0 1 1 0 8 0
zombiepl 144 285 0 285 1 0 1 1 0 8 1
processpl 1072 330 0 285 4 0 4 4 0 8 0
procpl 680 330 0 285 4 0 4 4 0 8 0
sockpl 488 79 0 57 3 0 3 3 0 8 0
mcl8k 8192 4 0 4 1 0 1 1 0 8 1
mcl4k 4096 10 0 10 1 0 1 1 0 8 1
mcl2k 2048 12115 0 12075 28 15 13 28 0 8 7
mtagpl 96 4 0 4 1 0 1 1 0 8 1
mbufpl 256 19489 0 19444 15 3 12 15 0 8 7
bufpl 280 2885 0 87 200 0 200 200 0 8 0
anonpl 24 177466 0 175127 24 0 24 24 0 188 6
amapchunkpl 152 8174 0 8027 7 0 7 7 0 158 1
amappl16 200 5237 0 5199 5 0 5 5 0 8 1
amappl15 192 6 0 6 1 0 1 1 0 8 1
amappl14 184 105 0 96 1 0 1 1 0 8 0
amappl13 176 8 0 7 1 0 1 1 0 8 0
amappl12 168 792 0 780 1 0 1 1 0 8 0
amappl11 160 60 0 50 1 0 1 1 0 8 0
amappl10 152 16 0 16 1 0 1 1 0 8 1
amappl9 144 101 0 101 1 0 1 1 0 8 1
amappl8 136 69 0 67 1 0 1 1 0 8 0
amappl7 128 93 0 82 1 0 1 1 0 8 0
amappl6 120 133 0 128 1 0 1 1 0 8 0
amappl5 112 96 0 88 1 0 1 1 0 8 0
amappl4 104 333 0 307 1 0 1 1 0 8 0
amappl3 96 2441 0 2411 1 0 1 1 0 8 0
amappl2 88 647 0 595 2 0 2 2 0 8 0
amappl1 80 8901 0 8462 11 0 11 11 0 8 1
amappl 88 1919 0 1856 2 0 2 2 0 92 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 128 253 0 253 1 0 1 1 0 8 1
dma64 64 6 0 6 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 314 0 285 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 314 0 285 1 0 1 1 0 8 0
vmmpekpl 168 6845 0 6826 1 0 1 1 0 8 0
vmmpepl 168 34826 0 33641 54 0 54 54 0 357 1
vmsppl 352 313 0 285 3 0 3 3 0 8 0
rwobjpl 24 18801 0 16716 14 0 14 14 0 8 1
pdppl 4096 634 0 570 78 14 64 64 0 8 0
pvpl 32 272208 0 267316 52 0 52 52 0 265 10
pmappl 216 313 0 285 2 0 2 2 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 314 0 32 9 0 9 9 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
memset() at memset+0x52
VOP_WRITE(fffffd806d6da008,ffff80002a68b7b0,5,fffffd807f7d78f0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_write(fffffd806f97d690,ffff80002a68b7b0,1) at vn_write+0x1a0 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80002a5f7558,3,ffff80002a68b7b0,1,ffff80002a68b870) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_pwritev(ffff80002a5f7558,ffff80002a68b920,ffff80002a68b870) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3352
syscall(ffff80002a68b920) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d8ea6d887d0, count: -7
ddb> machine ddbcpu 1
No such command
ddb> trace
memset() at memset+0x52
VOP_WRITE(fffffd806d6da008,ffff80002a68b7b0,5,fffffd807f7d78f0) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_write(fffffd806f97d690,ffff80002a68b7b0,1) at vn_write+0x1a0 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80002a5f7558,3,ffff80002a68b7b0,1,ffff80002a68b870) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_pwritev(ffff80002a5f7558,ffff80002a68b920,ffff80002a68b870) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3352
syscall(ffff80002a68b920) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d8ea6d887d0, count: -7