panic: receive 1: so 0xfffffd806f66c000, so_type 3, sb_cc 3774
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
440986 84966 0 0x2 0x4000000 0 syz-fuzzer
*126214 80077 0 0 0 1K dhclient
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821bff33) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd806f66c000,0,ffff800020ab5208,0,0,ffff800020ab5114) at soreceive+0x16ec sys/kern/uipc_socket.c:798
soo_read(fffffd807d7f61c8,ffff800020ab5208,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff800020a6e008,6,ffff800020ab5208,0,ffff800020ab52f0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236
sys_read(ffff800020a6e008,ffff800020ab52a0,ffff800020ab52f0) at sys_read+0x83 sys/kern/sys_generic.c:156
syscall(ffff800020ab5370) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020ab5370) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7950, count: 7
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
receive 1: so 0xfffffd806f66c000, so_type 3, sb_cc 3774
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821bff33) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd806f66c000,0,ffff800020ab5208,0,0,ffff800020ab5114) at soreceive+0x16ec sys/kern/uipc_socket.c:798
soo_read(fffffd807d7f61c8,ffff800020ab5208,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff800020a6e008,6,ffff800020ab5208,0,ffff800020ab52f0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236
sys_read(ffff800020a6e008,ffff800020ab52a0,ffff800020ab52f0) at sys_read+0x83 sys/kern/sys_generic.c:156
syscall(ffff800020ab5370) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020ab5370) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7950, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020ab4f50
rbx 0xffff800020ab5000
rdx 0xffff800020a6e008
rcx 0
rax 0
r8 0xffffffff81962f3f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xbe88541715a148ef
r12 0x3000000008
r13 0xffff800020ab4f60
r14 0x100
r15 0x1
rip 0xffffffff816ef798 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020ab4f40
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (dhclient) pid=126214 stat=onproc
flags process=0 proc=0
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020a6f150,0xffff800020a6e508
process=0xffff800020a9a010 user=0xffff800020ab0000, vmspace=0xfffffd807f0082e0
estcpu=0, cpticks=1, pctcpu=0.1
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
96472 156971 0 0 3 0x14200 acct acct
52755 320842 0 0 3 0x14200 bored sosplice
96929 25059 84966 0 3 0x2 biowait syz-executor.1
84966 387936 92535 0 3 0x82 kqread syz-fuzzer
84966 292719 92535 0 3 0x4000082 nanosleep syz-fuzzer
84966 227135 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 375608 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 391908 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 233270 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 440986 92535 0 7 0x4000002 syz-fuzzer
84966 213381 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 24914 92535 0 3 0x4000082 thrsleep syz-fuzzer
84966 481848 92535 0 3 0x4000082 nanosleep syz-fuzzer
92535 367845 77683 0 3 0x10008a pause ksh
77683 417934 96949 0 3 0x92 select sshd
76283 100748 1 0 3 0x100083 ttyin getty
96949 194519 1 0 3 0x80 select sshd
67850 196761 21745 74 3 0x100092 bpf pflogd
21745 189679 1 0 3 0x80 netio pflogd
63224 231470 84318 73 3 0x100090 kqread syslogd
84318 489874 1 0 3 0x100082 netio syslogd
16315 217602 1 77 3 0x100090 poll dhclient
*80077 126214 1 0 7 0 dhclient
78385 136972 0 0 2 0x14200 zerothread
3688 413699 0 0 3 0x14200 aiodoned aiodoned
3444 206214 0 0 3 0x14200 syncer update
54491 375793 0 0 3 0x14200 cleaner cleaner
91100 228567 0 0 3 0x14200 reaper reaper
4722 354140 0 0 3 0x14200 pgdaemon pagedaemon
29669 432127 0 0 3 0x14200 bored crynlk
47317 207746 0 0 3 0x14200 bored crypto
77190 166514 0 0 3 0x40014200 acpi0 acpi0
75866 301146 0 0 3 0x40014200 idle1
59976 346979 0 0 3 0x14200 bored softnet
56709 204459 0 0 3 0x14200 bored systqmp
70174 257385 0 0 3 0x14200 bored systq
1728 162225 0 0 3 0x40014200 bored softclock
95133 290646 0 0 3 0x40014200 idle0
53586 233093 0 0 3 0x14200 bored smr
1 192599 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 96929 (syz-executor.1) thread 0xffff800020ac0290 (25059)
exclusive rrwlock inode r = 0 (0xfffffd806509f4e0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974
#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 rrwlock inode r = 0 (0xfffffd806ace5918)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 80077 (dhclient) thread 0xffff800020a6e008 (126214)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82614e30)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 solock+0x66 sys/kern/uipc_socket2.c:292
#2 soreceive+0x114 sys/kern/uipc_socket.c:706
#3 soo_read+0x53 sys/kern/sys_socket.c:70
#4 dofilereadv+0x1a2 sys/kern/sys_generic.c:236
#5 sys_read+0x83 sys/kern/sys_generic.c:156
#6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9551 7446K 7961K 78643K 12011 0
pcb 13 8K 8K 78643K 75 0
rtable 84 3K 4K 78643K 321 0
ifaddr 64 12K 15K 78643K 123 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1480 0
iov 0 0K 16K 78643K 219 0
mount 1 1K 1K 78643K 1 0
vnodes 1225 77K 77K 78643K 1595 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 10 1K 1K 78643K 11 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 3 5K 25K 78643K 248 0
proc 62 63K 95K 78643K 472 0
subproc 16 1K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 34 0
in_multi 43 2K 2K 78643K 75 0
ether_multi 1 0K 0K 78643K 2 0
mrt 0 0K 0K 78643K 6 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 96 424K 424K 78643K 96 0
exec 0 0K 1K 78643K 227 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 107 13K 22K 78643K 1824 0
UVM aobj 14 2K 2K 78643K 14 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 43 0
NDP 12 0K 0K 78643K 27 0
temp 116 3034K 3664K 78643K 18932 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 44 0 42 1 0 1 1 0 8 0
rtentry 112 61 0 29 2 0 2 2 0 8 0
unpcb 120 140 0 130 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 1196 0 1196 1 1 0 1 0 8 0
tcpcb 544 104 0 100 1 0 1 1 0 8 0
inpcb 280 378 0 371 3 0 3 3 0 8 2
rttmr 72 2 0 2 2 1 1 1 0 8 1
nd6 48 7 0 6 1 0 1 1 0 8 0
ppxss 1128 8 0 8 1 0 1 1 0 8 1
pffrag 232 15 0 15 1 0 1 1 0 482 1
pffrnode 88 15 0 15 1 0 1 1 0 8 1
pffrent 40 464 0 464 1 0 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 30 0 3 1 0 1 1 0 8 0
pfstkey 112 30 0 3 1 0 1 1 0 8 0
pfstate 328 30 0 3 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 284 0 130 14 1 13 14 0 8 1
art_table 32 285 0 130 2 0 2 2 0 8 0
art_node 16 60 0 30 1 0 1 1 0 8 0
sysvmsgpl 40 43 0 19 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 9 0 1 1 0 1 1 0 8 0
shmpl 112 12 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1799 0 391 46 0 46 46 0 8 0
ffsino 272 1799 0 391 95 0 95 95 0 8 0
nchpl 144 2459 0 838 61 0 61 61 0 8 0
uvmvnodes 72 2150 0 0 40 0 40 40 0 8 0
vnodes 208 2150 0 0 114 0 114 114 0 8 0
namei 1024 7156 0 7155 1 0 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 6772 0 6771 8 6 2 7 0 8 1
plimitpl 152 31 0 24 1 0 1 1 0 8 0
sigapl 432 447 0 434 3 1 2 3 0 8 0
futexpl 56 5788 0 5788 1 0 1 1 0 8 1
knotepl 112 95 0 78 1 0 1 1 0 8 0
kqueuepl 104 70 0 68 1 0 1 1 0 8 0
pipepl 160 288 0 273 2 0 2 2 0 8 1
fdescpl 488 448 0 434 3 0 3 3 0 8 0
filepl 152 3451 0 3368 7 0 7 7 0 8 3
lockfpl 104 73 0 72 1 0 1 1 0 8 0
lockfspl 48 26 0 25 1 0 1 1 0 8 0
sessionpl 112 18 0 8 1 0 1 1 0 8 0
pgrppl 48 26 0 16 1 0 1 1 0 8 0
ucredpl 96 357 0 348 1 0 1 1 0 8 0
zombiepl 144 434 0 434 1 0 1 1 0 8 1
processpl 904 465 0 434 4 0 4 4 0 8 0
procpl 632 1040 0 1000 5 0 5 5 0 8 1
sosppl 128 8 0 8 2 1 1 1 0 8 1
sockpl 384 580 0 561 5 0 5 5 0 8 3
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 185 0 0 23 0 23 23 0 8 0
mtagpl 80 18 0 0 1 0 1 1 0 8 0
mbufpl 256 447 0 0 27 0 27 27 0 8 0
bufpl 280 6875 0 1350 395 0 395 395 0 8 0
anonpl 16 57017 0 37210 82 1 81 81 0 125 0
amapchunkpl 152 2423 0 2273 8 1 7 8 0 158 0
amappl16 192 2146 0 1064 55 0 55 55 0 8 0
amappl15 184 58 0 54 1 0 1 1 0 8 0
amappl14 176 27 0 26 1 0 1 1 0 8 0
amappl13 168 107 0 106 1 0 1 1 0 8 0
amappl12 160 4 0 3 2 1 1 1 0 8 0
amappl11 152 168 0 152 1 0 1 1 0 8 0
amappl10 144 17 0 10 1 0 1 1 0 8 0
amappl9 136 609 0 606 1 0 1 1 0 8 0
amappl8 128 131 0 108 1 0 1 1 0 8 0
amappl7 120 107 0 92 1 0 1 1 0 8 0
amappl6 112 170 0 164 1 0 1 1 0 8 0
amappl5 104 133 0 119 1 0 1 1 0 8 0
amappl4 96 814 0 780 1 0 1 1 0 8 0
amappl3 88 120 0 112 1 0 1 1 0 8 0
amappl2 80 2646 0 2582 3 1 2 3 0 8 0
amappl1 72 19620 0 19198 26 16 10 21 0 8 0
amappl 80 1294 0 1252 2 0 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 18 0 17 1 0 1 1 0 8 0
aobjpl 64 13 0 0 1 0 1 1 0 8 0
uaddrrnd 24 448 0 434 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 448 0 434 1 0 1 1 0 8 0
vmmpekpl 168 7388 0 7357 2 0 2 2 0 8 0
vmmpepl 168 62687 0 60600 139 18 121 133 0 357 20
vmsppl 368 447 0 434 2 0 2 2 0 8 0
pdppl 4096 903 0 868 6 0 6 6 0 8 1
pvpl 32 188484 0 165632 191 0 191 191 0 265 3
pmappl 232 447 0 434 2 1 1 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 186 0 4 6 0 6 6 0 8 0