uvm_fault(0xfffffd803f013dd0, 0x8, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at fifo_write+0x4e: movq 0x8(%rax),%r12
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
kernel page fault
uvm_fault(0xfffffd803f013dd0, 0x8, 0, 1) -> e
fifo_write(ffff800017583440) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:246
end trace frame: 0xffff8000175834b0, count: 0
ddb> trace
fifo_write(ffff800017583440) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:246
VOP_WRITE(fffffd802ec36d08,ffff8000175834d8,8,fffffd803f7c6b40) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
vn_rdwr(1,fffffd802ec36d08,ffff80001485bc00,4d,0,1) at vn_rdwr+0xef sys/kern/vfs_vnops.c:333
ufs_symlink(ffff800017583600) at ufs_symlink+0x121 sys/ufs/ufs/ufs_vnops.c:1400
VOP_SYMLINK(fffffd80380cd280,ffff800017583778,ffff8000175837c8,ffff8000175836a8,ffff80001485bc00) at VOP_SYMLINK+0xdd sys/kern/vfs_vops.c:498
dosymlinkat(ffff8000ffff2780,20000040,3,200000c0) at dosymlinkat+0x161 sys/kern/vfs_syscalls.c:1739
syscall(ffff800017583950) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,fffffffffffffffe,0,3,f199fe77010) at Xsyscall+0x128
end of kernel
end trace frame: 0xf1beb2bf370, count: -8
ddb> show registers
rdi 0xffffffff81818cf7 fifo_write+0x47
rsi 0x600
rbp 0xffff800017583430
rbx 0x8
rdx 0x601
rcx 0xffff80001653f000
rax 0
r8 0
r9 0x1
r10 0xc5b2cbe4f1752881
r11 0x703c5d766fc6c17b
r12 0x1
r13 0xffff8000175834d8
r14 0xffff800017583440
r15 0xfffffd802ec36d08
rip 0xffffffff81818cfe fifo_write+0x4e
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000175833f0
ss 0x10
fifo_write+0x4e: movq 0x8(%rax),%r12
ddb> show proc
PROC (syz-executor.1) pid=121469 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=78, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff2ee8,0xffffffff8256b828
process=0xffff8000ffff6a30 user=0xffff80001757e000, vmspace=0xfffffd803f013dd0
estcpu=28, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
21889 70829 1 0 2 0 syz-executor.1
*21889 121469 1 0 7 0x4000000 syz-executor.1
42944 473486 0 0 3 0x14200 bored sosplice
94367 372427 0 0 3 0x14200 acct acct
92336 7311 72691 0 2 0x2 syz-executor.0
72691 324988 37492 0 3 0x82 thrsleep syz-fuzzer
72691 36156 37492 0 2 0x4000482 syz-fuzzer
72691 62969 37492 0 3 0x4000082 kqread syz-fuzzer
72691 283317 37492 0 3 0x4000082 thrsleep syz-fuzzer
72691 301717 37492 0 3 0x4000082 thrsleep syz-fuzzer
72691 355319 37492 0 3 0x4000082 thrsleep syz-fuzzer
72691 476857 37492 0 3 0x4000082 thrsleep syz-fuzzer
37492 298209 70528 0 3 0x10008a pause ksh
70528 383206 82680 0 3 0x92 select sshd
60423 276240 1 0 3 0x100083 ttyin getty
82680 340884 1 0 3 0x80 select sshd
60316 145402 97130 73 2 0x100090 syslogd
97130 308049 1 0 3 0x100082 netio syslogd
49220 59849 1 77 3 0x100090 poll dhclient
62329 495280 1 0 3 0x80 poll dhclient
23766 321443 0 0 2 0x14200 zerothread
67485 520197 0 0 3 0x14200 aiodoned aiodoned
87734 301099 0 0 3 0x14200 syncer update
21134 491373 0 0 3 0x14200 cleaner cleaner
60958 471832 0 0 3 0x14200 reaper reaper
34677 198349 0 0 3 0x14200 pgdaemon pagedaemon
73976 118710 0 0 3 0x14200 bored crynlk
11301 354274 0 0 3 0x14200 bored crypto
40910 198946 0 0 3 0x40014200 acpi0 acpi0
96031 28779 0 0 3 0x14200 bored softnet
26214 46296 0 0 3 0x14200 bored systqmp
82834 433875 0 0 3 0x14200 bored systq
36887 248991 0 0 3 0x40014200 bored softclock
77571 272489 0 0 3 0x40014200 idle0
71151 161033 0 0 3 0x14200 bored smr
1 380583 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 Kern Lim
devbuf 9505 6336K 8596K 78643K 11712 0 0
pcb 13 8K 8K 78643K 87 0 0
rtable 91 3K 4K 78643K 388 0 0
ifaddr 58 12K 13K 78643K 108 0 0
counters 19 16K 16K 78643K 19 0 0
ioctlops 0 0K 2K 78643K 26 0 0
iov 0 0K 24K 78643K 73 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1249 78K 79K 78643K 1537 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 3 0 0
VM map 6 1K 1K 78643K 6 0 0
sem 12 0K 0K 78643K 153 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1793 195K 288K 78643K 12645 0 0
file desc 4 9K 25K 78643K 220 0 0
sigio 0 0K 0K 78643K 2 0 0
proc 48 38K 63K 78643K 401 0 0
subproc 32 2K 2K 78643K 51 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 8 0 0
in_multi 22 1K 2K 78643K 59 0 0
ether_multi 1 0K 0K 78643K 2 0 0
mrt 0 0K 0K 78643K 2 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 48 212K 212K 78643K 48 0 0
exec 0 0K 1K 78643K 223 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 98 37K 37K 78643K 1419 0 0
UVM aobj 6 2K 2K 78643K 6 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 68 0 0
NDP 13 0K 0K 78643K 32 0 0
temp 155 3530K 3594K 78643K 6873 0 0
kqueue 0 0K 0K 78643K 6 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 12 0 8 1 0 1 1 0 8 0
rtpcb 80 35 0 33 1 0 1 1 0 8 0
rtentry 112 72 0 38 2 0 2 2 0 8 0
unpcb 120 297 0 289 2 1 1 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 160 0 160 1 1 0 1 0 8 0
tcpcb 544 186 0 182 2 1 1 2 0 8 0
ipq 40 2 0 2 1 1 0 1 0 8 0
ipqe 40 6 0 6 1 1 0 1 0 8 0
inpcb 280 375 0 368 2 0 2 2 0 8 1
rttmr 72 1 0 1 1 1 0 1 0 8 0
nd6 48 7 0 5 1 0 1 1 0 8 0
ppxss 1128 7 0 7 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 335 0 162 15 2 13 15 0 8 0
art_table 32 336 0 162 2 0 2 2 0 8 0
art_node 16 71 0 40 1 0 1 1 0 8 0
sysvmsgpl 40 22 0 12 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 151 0 141 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1735 0 340 46 0 46 46 0 8 0
ffsino 240 1735 0 340 83 0 83 83 0 8 0
nchpl 144 2272 0 1832 60 40 20 60 0 8 0
uvmvnodes 72 2040 0 0 38 0 38 38 0 8 0
vnodes 208 2040 0 0 108 0 108 108 0 8 0
namei 1024 6244 0 6242 1 0 1 1 0 8 0
vcpupl 1984 4 0 0 1 0 1 1 0 8 0
vmpool 520 4 0 0 1 0 1 1 0 8 0
scxspl 192 6238 0 6238 8 7 1 7 0 8 1
plimitpl 152 33 0 26 1 0 1 1 0 8 0
sigapl 432 387 0 375 2 0 2 2 0 8 0
futexpl 56 6427 0 6427 1 0 1 1 0 8 1
knotepl 112 101 0 82 1 0 1 1 0 8 0
kqueuepl 104 55 0 53 1 0 1 1 0 8 0
pipepl 112 252 0 235 1 0 1 1 0 8 0
fdescpl 424 388 0 375 2 0 2 2 0 8 0
filepl 120 2864 0 2770 5 1 4 5 0 8 1
lockfpl 104 60 0 59 1 0 1 1 0 8 0
lockfspl 48 21 0 20 1 0 1 1 0 8 0
sessionpl 112 18 0 8 1 0 1 1 0 8 0
pgrppl 48 48 0 38 1 0 1 1 0 8 0
ucredpl 96 239 0 232 1 0 1 1 0 8 0
zombiepl 144 375 0 374 1 0 1 1 0 8 0
processpl 864 404 0 374 4 0 4 4 0 8 0
procpl 632 665 0 628 4 0 4 4 0 8 0
sosppl 128 4 0 4 1 1 0 1 0 8 0
sockpl 384 710 0 693 5 1 4 5 0 8 2
mcl64k 65536 57 0 57 1 0 1 1 0 8 1
mcl16k 16384 5 0 5 2 1 1 1 0 8 1
mcl12k 12288 11 0 11 1 0 1 1 0 8 1
mcl9k 9216 3 0 3 1 1 0 1 0 8 0
mcl8k 8192 11 0 11 1 0 1 1 0 8 1
mcl4k 4096 38 0 38 2 1 1 1 0 8 1
mcl2k 2048 69865 0 69818 18 10 8 15 0 8 1
mtagpl 80 148 0 94 3 1 2 2 0 8 0
mbufpl 256 113152 0 112968 21 8 13 18 0 8 0
bufpl 256 6698 0 1783 308 0 308 308 0 8 0
anonpl 16 83433 0 63593 96 1 95 95 0 62 15
amapchunkpl 152 2017 0 1895 10 1 9 9 0 158 3
amappl16 192 3455 0 2314 80 14 66 70 0 8 8
amappl14 176 78 0 72 1 0 1 1 0 8 0
amappl13 168 10 0 9 1 0 1 1 0 8 0
amappl12 160 12 0 8 1 0 1 1 0 8 0
amappl11 152 54 0 41 1 0 1 1 0 8 0
amappl10 144 7 0 7 1 1 0 1 0 8 0
amappl9 136 667 0 663 1 0 1 1 0 8 0
amappl8 128 261 0 231 2 0 2 2 0 8 0
amappl7 120 38 0 33 1 0 1 1 0 8 0
amappl6 112 58 0 51 1 0 1 1 0 8 0
amappl5 104 150 0 139 1 0 1 1 0 8 0
amappl4 96 579 0 552 1 0 1 1 0 8 0
amappl3 88 162 0 157 1 0 1 1 0 8 0
amappl2 80 2253 0 2188 3 1 2 3 0 8 0
amappl1 72 16698 0 16302 25 16 9 20 0 8 0
amappl 80 926 0 889 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 392 0 375 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 392 0 375 1 0 1 1 0 8 0
vmmpekpl 168 6982 0 6955 2 0 2 2 0 8 0
vmmpepl 168 56115 0 53963 142 12 130 138 0 357 33
vmsppl 272 387 0 375 2 1 1 2 0 8 0
pdppl 4096 790 0 754 7 1 6 6 0 8 0
pvpl 32 205114 0 182808 221 2 219 219 0 265 38
pmappl 200 391 0 375 1 0 1 1 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 469 0 27 13 0 13 13 0 8 0