panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failedp:an ifci:l eke rnel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 689
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
252267 2352 32767 0x10 0x4000000 0 syz-executor.1
* 35881 99934 32767 0x10 0x4000000 1 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
__assert(ffffffff81f7dcd5,ffffffff81f56a8f,2b1,ffffffff81f50a83) at __assert+0x2e sys/kern/subr_prf.c:155
proc_trampoline_mp() at proc_trampoline_mp+0x13b
end trace frame: 0x0, count: 11
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
kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_unveil.c", line 879
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
__assert(ffffffff81f7dcd5,ffffffff81f56a8f,2b1,ffffffff81f50a83) at __assert+0x2e sys/kern/subr_prf.c:155
proc_trampoline_mp() at proc_trampoline_mp+0x13b
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020c47a60
rbx 0xffff800020c47b10
rdx 0xffffffff81f1fdc9 cmd0646_9_tim_udma+0x134a6
rcx 0
rax 0
r8 0xffffffff814ea2c3 kprintf+0x183
r9 0x1
r10 0x25
r11 0x3fba948e73652995
r12 0x3000000008
r13 0xffff800020c47a70
r14 0x104
r15 0x1
rip 0xffffffff81c97598 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c47a50
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=35881 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=80, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff800020b64018,0xffff800020b65540
process=0xffff800020b2b078 user=0xffff800020c42000, vmspace=0xfffffd807effe870
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
2352 240636 15988 32767 2 0x10 syz-executor.1
2352 252267 15988 32767 7 0x4000010 syz-executor.1
99934 185974 77852 32767 2 0x10 syz-executor.0
*99934 35881 77852 32767 7 0x4000010 syz-executor.0
77852 181570 61703 32767 3 0x90 nanosleep syz-executor.0
61703 270870 52744 0 3 0x82 wait syz-executor.0
15988 426334 16599 32767 3 0x90 nanosleep syz-executor.1
16599 469950 52744 0 3 0x82 wait syz-executor.1
55881 316155 0 0 3 0x14200 bored sosplice
52744 90547 57763 0 3 0x82 thrsleep syz-fuzzer
52744 72827 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 466069 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 377574 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 461695 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 465929 57763 0 3 0x4000082 kqread syz-fuzzer
52744 64986 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 61870 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 302734 57763 0 3 0x4000082 thrsleep syz-fuzzer
52744 168437 57763 0 3 0x4000082 thrsleep syz-fuzzer
57763 321399 68831 0 3 0x10008a pause ksh
68831 347223 47174 0 3 0x92 select sshd
5727 498637 1 0 3 0x100083 ttyin getty
47174 248485 1 0 3 0x80 select sshd
305 11325 62838 73 3 0x100090 kqread syslogd
62838 354142 1 0 3 0x100082 netio syslogd
80942 34965 1 77 3 0x100090 poll dhclient
28611 501981 1 0 3 0x80 poll dhclient
83597 190632 0 0 2 0x14200 zerothread
17643 518470 0 0 3 0x14200 aiodoned aiodoned
26800 95074 0 0 3 0x14200 syncer update
50877 480267 0 0 3 0x14200 cleaner cleaner
19086 243851 0 0 3 0x14200 reaper reaper
33149 91654 0 0 3 0x14200 pgdaemon pagedaemon
51412 32633 0 0 3 0x14200 bored crynlk
73040 388540 0 0 3 0x14200 bored crypto
13187 465167 0 0 3 0x40014200 acpi0 acpi0
64725 375076 0 0 3 0x40014200 idle1
29173 348027 0 0 3 0x14200 bored softnet
23813 298259 0 0 3 0x14200 bored systqmp
48851 154470 0 0 3 0x14200 bored systq
2582 187690 0 0 3 0x40014200 bored softclock
79781 338625 0 0 3 0x40014200 idle0
90794 399379 0 0 3 0x14200 bored smr
1 40007 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 2352 (syz-executor.1) thread 0xffff800020b65530 (252267)
exclusive rrwlock inode r = 0 (0xfffffd806911ac58) locked @ /syzkaller/managers/setuid/kernel/sys/ufs/ufs/ufs_vnops.c:1547
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280
#2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410
#3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 vfs_lookup+0xf5 sys/kern/vfs_lookup.c:387
#6 namei+0x4b2 sys/kern/vfs_lookup.c:224
#7 domknodat+0xa1 sys/kern/vfs_syscalls.c:1405
#8 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#8 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#9 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82350b68) locked @ /syzkaller/managers/setuid/kernel/sys/sys/syscall_mi.h:90
#0 witness_lock+0x594 sys/kern/subr_witness.c:1201
#1 syscall+0x48b mi_syscall sys/sys/syscall_mi.h:91 [inline]
#1 syscall+0x48b sys/arch/amd64/amd64/trap.c:574
#2 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9459 6321K 6321K 78643K 10661 0 0
pcb 23 9K 11K 78643K 548 0 0
rtable 97 3K 3K 78643K 912 0 0
ifaddr 35 10K 10K 78643K 179 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 2K 78643K 46 0 0
iov 0 0K 24K 78643K 75 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1201 75K 75K 78643K 1821 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 21 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 1K 78643K 155 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 8 25K 33K 78643K 934 0 0
sigio 0 0K 0K 78643K 18 0 0
proc 48 50K 78K 78643K 814 0 0
subproc 68 69634K 69634K 78643K 850 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 143 0 0
in_multi 33 2K 2K 78643K 311 0 0
ether_multi 1 0K 0K 78643K 7 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 54 238K 238K 78643K 54 0 0
exec 0 0K 1K 78643K 315 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 88 21K 30K 78643K 3649 0 0
UVM aobj 90 3K 3K 78643K 100 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 32 0 0
NDP 5 0K 0K 78643K 78 0 0
temp 121 2378K 2450K 78643K 6458 0 0
kqueue 0 0K 0K 78643K 12 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 27 0 23 1 0 1 1 0 8 0
inpcbpl 280 479 0 472 1 0 1 1 0 8 0
plimitpl 152 111 0 102 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 248 0 208 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpcb 544 210 0 206 1 0 1 1 0 8 0
nd6 48 50 0 46 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1167 0 978 12 0 12 12 0 8 0
art_table 32 1168 0 978 2 0 2 2 0 8 0
art_node 16 247 0 213 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 150 0 140 1 0 1 1 0 8 0
shmpl 112 98 0 10 3 0 3 3 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2571 0 1125 47 0 47 47 0 8 0
ffsino 272 2571 0 1125 97 0 97 97 0 8 0
nchpl 144 4040 0 2407 61 0 61 61 0 8 0
uvmvnodes 72 3005 0 0 55 0 55 55 0 8 0
vnodes 200 3005 0 0 159 0 159 159 0 8 0
namei 1024 13043 0 13042 1 0 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 10763 0 10763 11 10 1 6 0 8 1
sigapl 432 1035 0 1019 3 1 2 3 0 8 0
futexpl 56 9218 0 9218 1 0 1 1 0 8 1
knotepl 112 762 0 743 1 0 1 1 0 8 0
kqueuepl 104 279 0 277 1 0 1 1 0 8 0
pipepl 112 734 0 715 3 2 1 2 0 8 0
fdescpl 488 1036 0 1019 3 0 3 3 0 8 0
filepl 152 6855 0 6759 6 1 5 6 0 8 1
lockfpl 104 248 0 248 3 2 1 1 0 8 1
lockfspl 32 476 0 476 3 2 1 1 0 8 1
sessionpl 112 40 0 30 1 0 1 1 0 8 0
pgrppl 48 42 0 32 1 0 1 1 0 8 0
ucredpl 96 2011 0 2002 1 0 1 1 0 8 0
zombiepl 144 1019 0 1019 2 1 1 1 0 8 1
processpl 840 1052 0 1019 4 0 4 4 0 8 0
procpl 600 2641 0 2597 5 1 4 5 0 8 0
srpgc 64 130 0 130 5 5 0 1 0 8 0
sosppl 128 11 0 11 4 4 0 1 0 8 0
sockpl 384 1028 0 1011 4 1 3 4 0 8 1
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 9 0 0 2 0 2 2 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k2 2112 7 0 0 1 0 1 1 0 8 0
mcl2k 2048 110 0 0 13 0 13 13 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 163 0 0 9 0 9 9 0 8 0
bufpl 256 7160 0 1122 378 0 378 378 0 8 0
anonpl 16 126950 0 120841 76 36 40 44 0 125 10
amapchunkpl 152 6754 0 6671 19 14 5 9 0 158 0
amappl16 192 4649 0 4305 66 40 26 30 0 8 8
amappl15 184 266 0 261 1 0 1 1 0 8 0
amappl14 176 259 0 254 2 1 1 1 0 8 0
amappl13 168 212 0 208 1 0 1 1 0 8 0
amappl12 160 283 0 279 1 0 1 1 0 8 0
amappl11 152 273 0 262 1 0 1 1 0 8 0
amappl10 144 181 0 176 4 3 1 1 0 8 0
amappl9 136 700 0 697 1 0 1 1 0 8 0
amappl8 128 337 0 311 3 1 2 2 0 8 0
amappl7 120 84 0 77 1 0 1 1 0 8 0
amappl6 112 90 0 84 1 0 1 1 0 8 0
amappl5 104 234 0 221 1 0 1 1 0 8 0
amappl4 96 1021 0 991 2 1 1 2 0 8 0
amappl3 88 510 0 505 1 0 1 1 0 8 0
amappl2 80 7525 0 7462 2 0 2 2 0 8 0
amappl1 72 33352 0 32899 23 13 10 19 0 8 0
amappl 72 3021 0 2986 1 0 1 1 0 75 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 99 0 10 2 0 2 2 0 8 0
uaddrrnd 24 1036 0 1019 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1036 0 1019 1 0 1 1 0 8 0
vmmpekpl 168 11966 0 11944 2 0 2 2 0 8 0
vmmpepl 168 123811 0 122339 108 32 76 76 0 357 12
vmsppl 360 1035 0 1019 2 0 2 2 0 8 0
pdppl 4096 2080 0 2038 6 0 6 6 0 8 0
pvpl 32 365175 0 355734 156 47 109 116 0 265 24
pmappl 224 1035 0 1019 3 2 1 2 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 528 0 2 16 0 16 16 0 8 0