"*"*panic: attempt WtAoR eNIxNeGc:u tSeP uL seNOrT a LddOrWEesRsE D 0Ox0N iSYn SCsAuLpLe rv3i 4s orEX ImTo d0 e9
Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
114367 61032 0 0 0x4000000 0 syz-executor.1
* 33609 75506 74 0x100012 0 1 pflogd
savectx(6,0,180fcc1918b0,3,180d65b03b16,180ffb5dc000) at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6040, count: 14
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
attempt to execute user address 0x0 in supervisor mode
ddb{1}> trace
savectx(6,0,180fcc1918b0,3,180d65b03b16,180ffb5dc000) at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6040, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800020aab4f0
rbx 0
rdx 0xffff800020ac0010
rcx 0
rax 0x31
r8 0xffffffff8154a38f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x67a614dafad1722b
r12 0
r13 0
r14 0xffff800020ac0010
r15 0
rip 0xffffffff817563f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020aab470
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{1}> show proc
PROC (pflogd) pid=33609 stat=onproc
flags process=100012<EXEC,SUGID,PLEDGE> proc=0
pri=51, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020ac1158,0xffff800020ac13e0
process=0xffff800020adc000 user=0xffff800020aa6000, vmspace=0xfffffd806e7df2e8
estcpu=1, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
61032 327655 48566 0 2 0 syz-executor.1
61032 114367 48566 0 7 0x4000000 syz-executor.1
48566 379050 92923 0 2 0x482 syz-executor.1
2171 397553 0 0 3 0x14200 acct acct
13995 513465 92923 0 2 0x482 syz-executor.0
78504 352713 0 0 3 0x14200 bored sosplice
92923 323140 97254 0 3 0x82 kqread syz-fuzzer
92923 30878 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 255709 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 448938 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 522417 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 293842 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 358836 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 465578 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 511916 97254 0 3 0x4000082 thrsleep syz-fuzzer
92923 475993 97254 0 3 0x4000082 thrsleep syz-fuzzer
97254 256046 20434 0 3 0x10008a pause ksh
20434 442215 52950 0 3 0x92 select sshd
54740 264376 1 0 3 0x100083 ttyin getty
52950 389645 1 0 3 0x80 select sshd
*75506 33609 27410 74 7 0x100012 pflogd
27410 280130 1 0 3 0x80 netio pflogd
6317 218285 82061 73 3 0x100090 kqread syslogd
82061 75226 1 0 3 0x100082 netio syslogd
72423 511821 1 77 3 0x100090 poll dhclient
54995 457402 1 0 3 0x80 poll dhclient
52352 166612 0 0 3 0x14200 pgzero zerothread
43678 36436 0 0 3 0x14200 aiodoned aiodoned
37011 367110 0 0 3 0x14200 syncer update
3410 351243 0 0 3 0x14200 cleaner cleaner
2505 421090 0 0 3 0x14200 reaper reaper
95521 203062 0 0 3 0x14200 pgdaemon pagedaemon
84366 338537 0 0 3 0x14200 bored crynlk
22870 22869 0 0 3 0x14200 bored crypto
60797 295677 0 0 3 0x40014200 acpi0 acpi0
22758 306200 0 0 3 0x40014200 idle1
4956 467292 0 0 3 0x14200 bored softnet
95857 213127 0 0 3 0x14200 bored systqmp
66130 353217 0 0 3 0x14200 bored systq
4986 177745 0 0 2 0x40014200 softclock
12324 226260 0 0 3 0x40014200 idle0
51920 107782 0 0 3 0x14200 bored smr
1 245069 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 61032 (syz-executor.1) thread 0xffff800020acf8d0 (114367)
exclusive rwlock netlock r = 0 (0xffffffff824663c8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 uvn_io+0x3b2 sys/uvm/uvm_vnode.c:1206
#2 uvn_get+0x226 sys/uvm/uvm_vnode.c:1049
#3 uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023
#4 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#5 kerntrap+0xec sys/arch/amd64/amd64/trap.c:287
#6 alltraps_kern_meltdown+0x7b
#7 copyin+0x4b
#8 sys_connect+0x9c sys/kern/uipc_syscalls.c:367
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#10 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff82646680)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9577 7092K 7932K 78643K 13496 0 0
pcb 13 8K 8K 78643K 271 0 0
rtable 108 13K 14K 78643K 1015 0 0
ifaddr 77 16K 17K 78643K 308 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1523 0 0
iov 0 0K 18K 78643K 2280 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1218 76K 77K 78643K 2280 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 12 0 0
VM map 15 7K 8K 78643K 18 0 0
sem 12 0K 1K 78643K 413 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 5 13K 25K 78643K 1277 0 0
sigio 0 0K 0K 78643K 29 0 0
proc 60 63K 95K 78643K 740 0 0
subproc 32 2K 2K 78643K 121 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 115 0 0
in_multi 23 1K 2K 78643K 170 0 0
ether_multi 1 0K 0K 78643K 9 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 72 318K 318K 78643K 72 0 0
exec 0 0K 1K 78643K 434 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 131 120K 136K 78643K 5606 0 0
UVM aobj 64 5K 5K 78643K 66 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 271 0 0
NDP 18 0K 0K 78643K 94 0 0
temp 214 3560K 4200K 78643K 27670 0 0
kqueue 0 0K 0K 78643K 14 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 31 0 25 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 123 0 121 1 0 1 1 0 8 0
rtentry 112 173 0 135 2 0 2 2 0 8 0
unpcb 120 742 0 728 1 0 1 1 0 8 0
syncache 264 19 0 19 6 6 0 1 0 8 0
tcpqe 32 30 0 30 3 3 0 1 0 8 0
tcpcb 544 514 0 507 1 0 1 1 0 8 0
inpcb 280 1917 0 1908 3 1 2 3 0 8 1
nd6 48 21 0 19 2 1 1 1 0 8 0
pkpcb 40 15 0 15 3 3 0 1 0 8 0
ppxss 1128 30 0 30 5 4 1 1 0 8 1
pffrag 232 33 0 33 5 4 1 1 0 482 1
pffrnode 88 33 0 33 5 4 1 1 0 8 1
pffrent 40 869 0 869 5 4 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 123 0 44 1 0 1 1 0 8 0
pfstkey 112 123 0 44 3 0 3 3 0 8 0
pfstate 328 123 0 44 7 0 7 7 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 4 0 3 4 3 1 3 0 8 0
art_heap4 256 735 0 545 21 7 14 16 0 8 2
art_table 32 739 0 548 3 0 3 3 0 8 1
art_node 16 172 0 137 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 9 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 411 0 401 1 0 1 1 0 8 0
shmpl 112 64 0 2 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 3365 0 1961 46 0 46 46 0 8 0
ffsino 272 3365 0 1961 96 1 95 95 0 8 0
nchpl 144 6184 0 4575 61 0 61 61 0 8 0
uvmvnodes 72 4158 0 0 76 0 76 76 0 8 0
vnodes 208 4158 0 0 219 0 219 219 0 8 0
namei 1024 19772 0 19772 1 0 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 13 0 0 2 0 2 2 0 8 0
vmpool 552 16 0 3 1 0 1 1 0 8 0
scxspl 192 17700 0 17700 13 10 3 7 0 8 3
plimitpl 152 96 0 88 1 0 1 1 0 8 0
sigapl 432 1462 0 1447 3 1 2 3 0 8 0
futexpl 56 30863 0 30863 1 0 1 1 0 8 1
knotepl 112 343 0 324 3 2 1 3 0 8 0
kqueuepl 104 312 0 310 1 0 1 1 0 8 0
pipepl 112 886 0 867 5 4 1 2 0 8 0
fdescpl 488 1463 0 1447 3 0 3 3 0 8 0
filepl 152 13077 0 12975 9 3 6 8 0 8 2
lockfpl 104 470 0 469 1 0 1 1 0 8 0
lockfspl 48 165 0 164 1 0 1 1 0 8 0
sessionpl 112 23 0 12 1 0 1 1 0 8 0
pgrppl 48 41 0 30 1 0 1 1 0 8 0
ucredpl 96 1366 0 1357 1 0 1 1 0 8 0
zombiepl 144 1449 0 1448 1 0 1 1 0 8 0
processpl 896 1482 0 1448 4 0 4 4 0 8 0
procpl 632 4538 0 4494 5 0 5 5 0 8 0
srpgc 64 6 0 6 2 2 0 1 0 8 0
sosppl 128 19 0 19 5 4 1 1 0 8 1
sockpl 384 2807 0 2782 9 4 5 5 0 8 1
mcl64k 65536 26 0 0 3 0 3 3 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 6 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 180 0 0 22 0 22 22 0 8 0
mtagpl 80 24 0 0 1 0 1 1 0 8 0
mbufpl 256 471 0 0 26 0 26 26 0 8 0
bufpl 256 10530 0 3482 441 0 441 441 0 8 0
anonpl 16 180760 0 162958 98 21 77 92 0 124 0
amapchunkpl 152 10073 0 9951 28 15 13 13 0 158 6
amappl16 192 8377 0 7332 81 27 54 64 0 8 1
amappl14 176 65 0 62 1 0 1 1 0 8 0
amappl13 168 48 0 46 1 0 1 1 0 8 0
amappl12 160 409 0 404 1 0 1 1 0 8 0
amappl11 152 277 0 261 1 0 1 1 0 8 0
amappl10 144 28 0 26 1 0 1 1 0 8 0
amappl9 136 1073 0 1064 1 0 1 1 0 8 0
amappl8 128 620 0 588 2 0 2 2 0 8 0
amappl7 120 62 0 55 1 0 1 1 0 8 0
amappl6 112 300 0 286 1 0 1 1 0 8 0
amappl5 104 578 0 564 1 0 1 1 0 8 0
amappl4 96 1665 0 1633 1 0 1 1 0 8 0
amappl3 88 265 0 260 1 0 1 1 0 8 0
amappl2 80 10502 0 10427 3 1 2 3 0 8 0
amappl1 72 42700 0 42265 25 15 10 20 0 8 0
amappl 80 4898 0 4851 3 1 2 2 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 65 0 2 2 0 2 2 0 8 0
uaddrrnd 24 1479 0 1447 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1479 0 1447 1 0 1 1 0 8 0
vmmpekpl 168 15736 0 15696 3 1 2 3 0 8 0
vmmpepl 168 190239 0 188018 184 46 138 138 0 357 35
vmsppl 368 1462 0 1447 2 0 2 2 0 8 0
pdppl 4096 2965 0 2913 7 0 7 7 0 8 0
pvpl 32 489039 0 468296 230 41 189 219 0 265 11
pmappl 232 1478 0 1450 3 1 2 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 638 0 14 18 0 18 18 0 8 0