panic: attempt to execute user address 0x1 in supervisor mode
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*390198 49211 0 0x1000 0x4080000 1K syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pageflttrap() at pageflttrap+0x40b
kerntrap(ffff800021b8ae00) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287
alltraps_kern_meltdown(6,ffff8000223b0000,fffffd80667e38c8,10,ffff8000000254a0,ffff800021b8b068) at alltraps_kern_meltdown+0x7b
1(b,ffff800021b8afc8,83,ffff800021b8b068,0,b) at 0x1
rt_clone(ffff800021b8b0d8,fffffd80708ffa80,0) at rt_clone+0x78 sys/net/route.c:266
rtalloc_mpath(fffffd80708ffa80,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline]
rtalloc_mpath(fffffd80708ffa80,0,0) at rtalloc_mpath+0xba sys/net/route.c:359
in_pcbselsrc(ffff800021b8b1b0,fffffd807e3afc20,fffffd80708ffa00) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934
in_pcbconnect(fffffd80708ffa00,fffffd807e3afc00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492
udp_usrreq(fffffd807c2eba98,4,0,fffffd807e3afc00,0,ffff800020ace528) at udp_usrreq+0x560
sys_connect(ffff800020ace528,ffff800021b8b338,ffff800021b8b380) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388
syscall(ffff800021b8b400) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800021b8b400) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,fffffffffffffed2,0,3,3451b67d0e0) at Xsyscall+0x128
end of kernel
end trace frame: 0x347fd5807d0, count: 1
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 0x1 in supervisor mode
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pageflttrap() at pageflttrap+0x40b
kerntrap(ffff800021b8ae00) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287
alltraps_kern_meltdown(6,ffff8000223b0000,fffffd80667e38c8,10,ffff8000000254a0,ffff800021b8b068) at alltraps_kern_meltdown+0x7b
1(b,ffff800021b8afc8,83,ffff800021b8b068,0,b) at 0x1
rt_clone(ffff800021b8b0d8,fffffd80708ffa80,0) at rt_clone+0x78 sys/net/route.c:266
rtalloc_mpath(fffffd80708ffa80,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline]
rtalloc_mpath(fffffd80708ffa80,0,0) at rtalloc_mpath+0xba sys/net/route.c:359
in_pcbselsrc(ffff800021b8b1b0,fffffd807e3afc20,fffffd80708ffa00) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934
in_pcbconnect(fffffd80708ffa00,fffffd807e3afc00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492
udp_usrreq(fffffd807c2eba98,4,0,fffffd807e3afc00,0,ffff800020ace528) at udp_usrreq+0x560
sys_connect(ffff800020ace528,ffff800021b8b338,ffff800021b8b380) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388
syscall(ffff800021b8b400) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800021b8b400) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,fffffffffffffed2,0,3,3451b67d0e0) at Xsyscall+0x128
end of kernel
end trace frame: 0x347fd5807d0, count: -14
ddb{1}> show registers
rdi 0xffffffff81d9bc27 db_enter+0x17
rsi 0x384a __ALIGN_SIZE+0x284a
rbp 0xffff800021b8ac70
rbx 0xffff800021b8ad20
rdx 0x384b __ALIGN_SIZE+0x284b
rcx 0xffff8000223b0000
rax 0xffff8000223b0000
r8 0xffffffff81aab38f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x3c332fc2ae8558dd
r12 0x3000000008
r13 0xffff800021b8ac80
r14 0x100
r15 0x1
rip 0xffffffff81d9bc28 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021b8ac60
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=390198 stat=onproc
flags process=1000<SINGLEEXIT> proc=4080000<SUSPSINGLE,THREAD>
pri=17, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff800020acef08,0xffff800020acf8f8
process=0xffff800020add500 user=0xffff800021b86000, vmspace=0xfffffd807f00b5c0
estcpu=30, cpticks=2, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
49211 229609 27871 0 3 0x3000 suspend syz-executor.1
*49211 390198 27871 0 7 0x4081000 syz-executor.1
69389 484141 98964 0 3 0x80 nanosleep syz-executor.0
69389 252276 98964 0 3 0x4000080 netio syz-executor.0
69389 1006 98964 0 3 0x4000080 fsleep syz-executor.0
98964 295509 5454 0 3 0x82 nanosleep syz-executor.0
27871 302476 5454 0 3 0x82 nanosleep syz-executor.1
8044 269087 1 0 3 0x100083 ttyin getty
10454 495510 0 0 3 0x14200 bored sosplice
5454 65878 12258 0 3 0x82 thrsleep syz-fuzzer
5454 26769 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 189215 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 489491 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 280216 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 205416 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 488506 12258 0 3 0x4000082 kqread syz-fuzzer
5454 10033 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 267006 12258 0 3 0x4000082 thrsleep syz-fuzzer
5454 523517 12258 0 3 0x4000082 thrsleep syz-fuzzer
12258 382999 92807 0 3 0x10008a pause ksh
92807 191370 65246 0 3 0x92 select sshd
65246 302672 1 0 3 0x80 select sshd
75982 141634 64535 74 3 0x100092 bpf pflogd
64535 198990 1 0 3 0x80 netio pflogd
55395 467902 91062 73 3 0x100090 kqread syslogd
91062 286799 1 0 3 0x100082 netio syslogd
61690 439354 1 77 3 0x100090 poll dhclient
76055 317014 1 0 3 0x80 poll dhclient
55061 381517 0 0 3 0x14200 pgzero zerothread
23044 259578 0 0 3 0x14200 aiodoned aiodoned
34546 181018 0 0 3 0x14200 syncer update
74060 345381 0 0 3 0x14200 cleaner cleaner
57202 194763 0 0 3 0x14200 reaper reaper
73386 347053 0 0 3 0x14200 pgdaemon pagedaemon
45599 337872 0 0 3 0x14200 bored crynlk
61647 509887 0 0 3 0x14200 bored crypto
74710 507754 0 0 3 0x40014200 acpi0 acpi0
64426 263829 0 0 3 0x40014200 idle1
81416 479216 0 0 3 0x14200 bored softnet
40124 459292 0 0 3 0x14200 bored systqmp
2963 111493 0 0 3 0x14200 bored systq
67655 262043 0 0 3 0x40014200 bored softclock
36546 156463 0 0 7 0x40014200 idle0
27388 248764 0 0 3 0x14200 bored smr
1 252038 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 49211 (syz-executor.1) thread 0xffff800020ace528 (390198)
exclusive rwlock netlock r = 0 (0xffffffff824a1878)
#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 (0xffffffff8265b1f8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:441
#3 sleep_finish+0x113 sys/kern/kern_synch.c:373
#4 tsleep+0x198 sleep_finish_timeout sys/kern/kern_synch.c:397 [inline]
#4 tsleep+0x198 sleep_finish_all sys/kern/kern_synch.c:183 [inline]
#4 tsleep+0x198 sys/kern/kern_synch.c:152
#5 biowait+0xa1 sys/kern/vfs_bio.c:1231
#6 ffs_read+0x2ee
#7 VOP_READ+0xbf sys/kern/vfs_vops.c:248
#8 uvn_io+0x35e
#9 uvn_get+0x226 sys/uvm/uvm_vnode.c:1049
#10 uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023
#11 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#12 kerntrap+0xec sys/arch/amd64/amd64/trap.c:287
#13 alltraps_kern_meltdown+0x7b
#14 copyin+0x4b
#15 sys_connect+0x9c sys/kern/uipc_syscalls.c:367
#16 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#16 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#17 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9627 6482K 7989K 78643K 27017 0 0
pcb 13 9K 9K 78643K 821 0 0
rtable 126 9K 9K 78643K 2304 0 0
ifaddr 100 21K 24K 78643K 733 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1691 0 0
iov 0 0K 32K 78643K 566 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1209 76K 77K 78643K 6803 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 9K 78643K 99 0 0
VM map 2 1K 1K 78643K 10 0 0
sem 12 0K 1K 78643K 1991 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 5628 0 0
sigio 0 0K 0K 78643K 112 0 0
proc 62 63K 95K 78643K 1880 0 0
subproc 32 2K 2K 78643K 408 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 598 0 0
in_multi 35 2K 2K 78643K 496 0 0
ether_multi 1 0K 0K 78643K 29 0 0
mrt 2 0K 0K 78643K 23 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 96 424K 424K 78643K 96 0 0
exec 0 0K 1K 78643K 910 0 0
pfkey data 0 0K 0K 78643K 2 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 120 22K 31K 78643K 20168 0 0
UVM aobj 130 8K 8K 78643K 197 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 964 0 0
NDP 26 1K 1K 78643K 229 0 0
temp 256 3557K 4197K 78643K 94374 0 0
kqueue 0 0K 0K 78643K 39 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 76 0 69 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 275 0 273 1 0 1 1 0 8 0
rtentry 112 357 0 310 2 0 2 2 0 8 0
unpcb 120 2254 0 2237 3 2 1 2 0 8 0
syncache 264 20 0 20 7 6 1 1 0 8 1
tcpqe 32 5162 0 5162 3 2 1 1 0 8 1
tcpcb 544 1604 0 1599 2 1 1 2 0 8 0
inpcb 280 11763 0 11751 24 22 2 5 0 8 0
rttmr 72 2 0 2 2 2 0 1 0 8 0
nd6 48 51 0 47 3 2 1 1 0 8 0
pkpcb 40 32 0 32 10 10 0 1 0 8 0
ppxss 1128 109 0 109 17 16 1 1 0 8 1
pffrag 232 9 0 9 4 4 0 1 0 482 0
pffrnode 88 9 0 9 4 4 0 1 0 8 0
pffrent 40 26 0 26 5 5 0 1 0 8 0
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 24 231 0 182 1 0 1 1 0 8 0
pfstkey 112 231 0 182 2 0 2 2 0 8 0
pfstate 328 231 0 182 7 2 5 5 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 1430 0 1200 24 9 15 16 0 8 0
art_table 32 1434 0 1203 2 0 2 2 0 8 0
art_node 16 343 0 300 1 0 1 1 0 8 0
sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0
semapl 112 1989 0 1979 1 0 1 1 0 8 0
shmpl 112 195 0 67 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 9766 0 8355 46 0 46 46 0 8 0
ffsino 272 9766 0 8355 95 0 95 95 0 8 0
nchpl 144 19265 0 17615 62 0 62 62 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 208 5926 0 0 312 0 312 312 0 8 0
namei 1024 63015 0 63015 3 2 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vmpool 552 8 0 8 5 5 0 1 0 8 0
scsiplug 64 15 0 15 9 9 0 1 0 8 0
scxspl 192 52502 0 52502 31 30 1 7 0 8 1
plimitpl 152 548 0 540 1 0 1 1 0 8 0
sigapl 432 5766 0 5750 4 2 2 3 0 8 0
futexpl 56 111055 0 111054 2 1 1 1 0 8 0
knotepl 112 1558 0 1539 4 3 1 3 0 8 0
kqueuepl 104 1917 0 1914 1 0 1 1 0 8 0
pipepl 112 3020 0 3001 7 6 1 2 0 8 0
fdescpl 488 5767 0 5750 3 0 3 3 0 8 0
filepl 152 47366 0 47258 22 17 5 7 0 8 0
lockfpl 104 1752 0 1751 1 0 1 1 0 8 0
lockfspl 48 592 0 591 1 0 1 1 0 8 0
sessionpl 112 44 0 33 1 0 1 1 0 8 0
pgrppl 48 114 0 103 1 0 1 1 0 8 0
ucredpl 96 6282 0 6273 1 0 1 1 0 8 0
zombiepl 144 5753 0 5752 4 3 1 1 0 8 0
processpl 896 5785 0 5752 5 1 4 5 0 8 0
procpl 632 18304 0 18259 8 3 5 5 0 8 0
srpgc 64 42 0 42 16 15 1 1 0 8 1
sosppl 128 77 0 77 17 17 0 1 0 8 0
sockpl 384 14542 0 14511 44 39 5 8 0 8 1
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 22 0 0 3 1 2 3 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 25 0 0 2 0 2 2 0 8 0
mcl8k 8192 21 0 0 3 1 2 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 125 0 0 14 0 14 14 0 8 0
mtagpl 80 101 0 0 2 0 2 2 0 8 0
mbufpl 256 709 0 0 35 0 35 35 0 8 0
bufpl 256 17858 0 10810 441 0 441 441 0 8 0
anonpl 16 544382 0 532492 187 122 65 79 0 124 0
amapchunkpl 152 36662 0 36545 39 33 6 18 0 158 0
amappl16 192 28671 0 27802 154 109 45 56 0 8 0
amappl15 184 1628 0 1627 1 0 1 1 0 8 0
amappl14 176 552 0 549 2 1 1 1 0 8 0
amappl13 168 297 0 297 3 3 0 1 0 8 0
amappl12 160 658 0 655 2 1 1 1 0 8 0
amappl11 152 836 0 821 1 0 1 1 0 8 0
amappl10 144 442 0 436 1 0 1 1 0 8 0
amappl9 136 1404 0 1398 1 0 1 1 0 8 0
amappl8 128 944 0 912 4 2 2 2 0 8 0
amappl7 120 577 0 568 1 0 1 1 0 8 0
amappl6 112 775 0 768 1 0 1 1 0 8 0
amappl5 104 968 0 951 1 0 1 1 0 8 0
amappl4 96 5858 0 5824 2 1 1 2 0 8 0
amappl3 88 933 0 922 1 0 1 1 0 8 0
amappl2 80 45176 0 45093 4 2 2 3 0 8 0
amappl1 72 137973 0 137515 25 15 10 20 0 8 0
amappl 80 18928 0 18885 2 1 1 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
dma64 64 259 0 259 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 64 196 0 67 3 0 3 3 0 8 0
uaddrrnd 24 5775 0 5750 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5775 0 5750 1 0 1 1 0 8 0
vmmpekpl 168 50393 0 50361 2 0 2 2 0 8 0
vmmpepl 168 714365 0 712245 392 271 121 121 0 357 24
vmsppl 368 5766 0 5750 2 0 2 2 0 8 0
pdppl 4096 11557 0 11516 7 1 6 6 0 8 0
pvpl 32 1498692 0 1483501 399 239 160 189 0 265 5
pmappl 232 5774 0 5758 7 6 1 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 646 0 21 18 0 18 18 0 8 0