login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/panic: kernel 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
186946 21492 32767 0x10 0x4000000 0 syz-executor.1
*214427 21492 32767 0x10 0x4000000 1 syz-executor.1
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 0xffff800020c619f0
rbx 0xffff800020c61aa0
rdx 0xffffffff81f1fdc9 cmd0646_9_tim_udma+0x134a6
rcx 0
rax 0
r8 0xffffffff814ea2c3 kprintf+0x183
r9 0x1
r10 0x25
r11 0x27b0ba416fead41c
r12 0x3000000008
r13 0xffff800020c61a00
r14 0x104
r15 0x1
rip 0xffffffff81c97598 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c619e0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=214427 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=66, usrpri=66, nice=20
forw=0xffffffffffffffff, list=0xffff800020b28270,0xffff800020b28730
process=0xffff800020b2b708 user=0xffff800020c5c000, vmspace=0xfffffd807effe5a0
estcpu=16, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
71771 272879 42432 32767 2 0x10 syz-executor.0
71771 505455 42432 32767 3 0x4000090 fsleep syz-executor.0
71771 43934 42432 32767 3 0x4000090 fsleep syz-executor.0
21492 322313 86147 32767 2 0x10 syz-executor.1
21492 469162 86147 32767 2 0x4000010 syz-executor.1
21492 186946 86147 32767 7 0x4000010 syz-executor.1
*21492 214427 86147 32767 7 0x4000010 syz-executor.1
21492 233832 86147 32767 2 0x4000010 syz-executor.1
86147 299491 99844 32767 3 0x90 nanosleep syz-executor.1
99844 292351 82889 0 3 0x82 wait syz-executor.1
42432 504561 32691 32767 3 0x90 nanosleep syz-executor.0
32691 224079 82889 0 3 0x82 wait syz-executor.0
18876 206128 0 0 3 0x14200 bored sosplice
82889 21077 41896 0 3 0x82 thrsleep syz-fuzzer
82889 297618 41896 0 3 0x4000082 nanosleep syz-fuzzer
82889 341628 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 49576 41896 0 3 0x4000082 kqread syz-fuzzer
82889 182227 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 394394 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 182980 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 133780 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 451952 41896 0 3 0x4000082 thrsleep syz-fuzzer
82889 160989 41896 0 3 0x4000082 thrsleep syz-fuzzer
41896 5914 86029 0 3 0x10008a pause ksh
86029 515452 61185 0 3 0x92 select sshd
17190 403347 1 0 3 0x100083 ttyin getty
61185 515453 1 0 3 0x80 select sshd
27814 328917 80731 73 3 0x100090 kqread syslogd
80731 382034 1 0 3 0x100082 netio syslogd
67258 176650 1 77 3 0x100090 poll dhclient
13852 430882 1 0 3 0x80 poll dhclient
95623 270973 0 0 2 0x14200 zerothread
51873 262925 0 0 3 0x14200 aiodoned aiodoned
90487 443108 0 0 3 0x14200 syncer update
13987 101286 0 0 3 0x14200 cleaner cleaner
75065 39041 0 0 3 0x14200 reaper reaper
69643 359746 0 0 3 0x14200 pgdaemon pagedaemon
8685 437542 0 0 3 0x14200 bored crynlk
96248 288969 0 0 3 0x14200 bored crypto
93269 139018 0 0 3 0x40014200 acpi0 acpi0
16046 436341 0 0 3 0x40014200 idle1
97122 236210 0 0 3 0x14200 bored softnet
77370 136840 0 0 3 0x14200 bored systqmp
89640 346731 0 0 3 0x14200 bored systq
36355 80789 0 0 3 0x40014200 bored softclock
87509 178619 0 0 3 0x40014200 idle0
19075 402149 0 0 3 0x14200 bored smr
1 333115 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 21492 (syz-executor.1) thread 0xffff800020b28bd0 (186946)
exclusive rrwlock inode r = 0 (0xfffffd80693951b8) 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 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x151 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x84 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x15d3 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523
#11 namei+0x4b2 sys/kern/vfs_lookup.c:224
#12 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673
#13 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#13 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8069395708) 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 dounlinkat+0xa5 sys/kern/vfs_syscalls.c:1673
#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 10K 78643K 413 0 0
rtable 97 3K 3K 78643K 907 0 0
ifaddr 36 10K 10K 78643K 178 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 2K 78643K 40 0 0
iov 0 0K 28K 78643K 65 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1201 75K 75K 78643K 1729 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 7 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 0K 78643K 123 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 8 25K 33K 78643K 699 0 0
sigio 0 0K 0K 78643K 6 0 0
proc 44 50K 58K 78643K 786 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 98 0 0
in_multi 33 2K 2K 78643K 299 0 0
ether_multi 1 0K 0K 78643K 4 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 317 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 86 21K 30K 78643K 2925 0 0
UVM aobj 25 2K 2K 78643K 27 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 30 0 0
NDP 5 0K 0K 78643K 78 0 0
temp 100 2369K 2434K 78643K 5843 0 0
kqueue 0 0K 0K 78643K 7 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 280 364 0 357 1 0 1 1 0 8 0
plimitpl 152 95 0 86 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 544 132 0 128 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 1157 0 969 12 0 12 12 0 8 0
art_table 32 1158 0 969 2 0 2 2 0 8 0
art_node 16 247 0 213 1 0 1 1 0 8 0
semapl 112 121 0 111 1 0 1 1 0 8 0
shmpl 112 25 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2196 0 771 47 0 47 47 0 8 0
ffsino 272 2196 0 771 96 0 96 96 0 8 0
nchpl 144 3307 0 1692 61 0 61 61 0 8 0
uvmvnodes 72 2630 0 0 48 0 48 48 0 8 0
vnodes 200 2630 0 0 139 0 139 139 0 8 0
namei 1024 10624 0 10623 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 8906 0 8906 14 10 4 6 0 8 4
sigapl 432 800 0 784 3 1 2 3 0 8 0
futexpl 56 5956 0 5954 1 0 1 1 0 8 0
knotepl 112 654 0 635 1 0 1 1 0 8 0
kqueuepl 104 147 0 144 1 0 1 1 0 8 0
pipepl 112 674 0 655 3 2 1 2 0 8 0
fdescpl 488 801 0 784 3 0 3 3 0 8 0
filepl 152 5135 0 5036 6 1 5 5 0 8 1
lockfpl 104 144 0 144 3 2 1 1 0 8 1
lockfspl 32 331 0 331 3 2 1 1 0 8 1
sessionpl 112 40 0 30 1 0 1 1 0 8 0
pgrppl 48 44 0 34 1 0 1 1 0 8 0
ucredpl 96 1261 0 1252 1 0 1 1 0 8 0
zombiepl 144 784 0 784 2 1 1 1 0 8 1
processpl 840 817 0 784 4 0 4 4 0 8 0
procpl 600 1909 0 1861 4 0 4 4 0 8 0
srpgc 64 134 0 134 1 0 1 1 0 8 1
sosppl 128 10 0 10 3 3 0 1 0 8 0
sockpl 384 766 0 749 4 1 3 4 0 8 1
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 15 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 115 0 0 14 0 14 14 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 151 0 0 9 0 9 9 0 8 0
bufpl 256 6705 0 1122 349 0 349 349 0 8 0
anonpl 16 88216 0 78000 53 11 42 42 0 125 0
amapchunkpl 152 5422 0 5316 15 6 9 11 0 158 4
amappl16 192 3049 0 2468 40 10 30 30 0 8 0
amappl15 184 58 0 54 1 0 1 1 0 8 0
amappl14 176 302 0 297 2 1 1 1 0 8 0
amappl13 168 83 0 78 1 0 1 1 0 8 0
amappl12 160 178 0 172 1 0 1 1 0 8 0
amappl11 152 71 0 60 1 0 1 1 0 8 0
amappl10 144 173 0 173 3 3 0 1 0 8 0
amappl9 136 726 0 719 1 0 1 1 0 8 0
amappl8 128 330 0 307 1 0 1 1 0 8 0
amappl7 120 108 0 103 1 0 1 1 0 8 0
amappl6 112 123 0 111 1 0 1 1 0 8 0
amappl5 104 248 0 235 1 0 1 1 0 8 0
amappl4 96 854 0 825 2 1 1 2 0 8 0
amappl3 88 423 0 416 1 0 1 1 0 8 0
amappl2 80 5136 0 5068 2 0 2 2 0 8 0
amappl1 72 28055 0 27573 23 13 10 19 0 8 0
amappl 72 2303 0 2264 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 26 0 2 1 0 1 1 0 8 0
uaddrrnd 24 801 0 784 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 801 0 784 1 0 1 1 0 8 0
vmmpekpl 168 10295 0 10272 2 0 2 2 0 8 0
vmmpepl 168 98475 0 96717 97 20 77 77 0 357 0
vmsppl 360 800 0 784 2 0 2 2 0 8 0
pdppl 4096 1610 0 1568 6 0 6 6 0 8 0
pvpl 32 275817 0 262247 142 32 110 111 0 265 0
pmappl 224 800 0 784 3 2 1 2 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 499 0 3 15 0 15 15 0 8 0