panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/mpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 689
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
382419 43073 0 0 0x4000000 0 syz-executor.1
*307675 27672 0 0 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(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) 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/multicore/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(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) 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 0xffff800020c697f0
rbx 0xffff800020c698a0
rdx 0xffffffff81f89e77 apollo_pio_rec+0x9e22
rcx 0
rax 0
r8 0xffffffff811c43a3 kprintf+0x183
r9 0x1
r10 0x25
r11 0x132d3edd0457e1a1
r12 0x3000000008
r13 0xffff800020c69800
r14 0x104
r15 0x1
rip 0xffffffff81e2e758 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c697e0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=307675 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=81, usrpri=81, nice=20
forw=0xffffffffffffffff, list=0xffff800020b384c8,0xffffffff82394e00
process=0xffff800020b8cd38 user=0xffff800020c64000, vmspace=0xfffffd807effe870
estcpu=31, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
43073 342049 5234 0 2 0 syz-executor.1
43073 382419 5234 0 7 0x4000000 syz-executor.1
27672 192312 69238 0 2 0 syz-executor.0
27672 183641 69238 0 3 0x4000080 rest syz-executor.0
27672 399848 69238 0 2 0x4000000 syz-executor.0
*27672 307675 69238 0 7 0x4000000 syz-executor.0
5234 246990 19806 0 3 0x82 nanosleep syz-executor.1
69238 481833 19806 0 3 0x82 nanosleep syz-executor.0
49513 515039 1 0 3 0x100083 ttyin getty
85302 266886 0 0 3 0x14200 bored sosplice
19806 520847 48799 0 3 0x82 thrsleep syz-fuzzer
19806 46586 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 451213 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 362582 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 14678 48799 0 3 0x4000082 kqread syz-fuzzer
19806 257696 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 442851 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 456892 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 299485 48799 0 3 0x4000082 thrsleep syz-fuzzer
19806 284138 48799 0 3 0x4000082 thrsleep syz-fuzzer
48799 54594 55470 0 3 0x10008a pause ksh
55470 485667 44505 0 3 0x92 select sshd
44505 498592 1 0 3 0x80 select sshd
39607 171239 98570 74 3 0x100092 bpf pflogd
98570 479451 1 0 3 0x80 netio pflogd
95005 361824 85244 73 3 0x100090 kqread syslogd
85244 290640 1 0 3 0x100082 netio syslogd
92793 155985 1 77 3 0x100090 poll dhclient
48551 209132 1 0 3 0x80 poll dhclient
25187 486024 0 0 2 0x14200 zerothread
98589 234571 0 0 3 0x14200 aiodoned aiodoned
76958 493806 0 0 3 0x14200 syncer update
70100 256316 0 0 3 0x14200 cleaner cleaner
93485 518456 0 0 3 0x14200 reaper reaper
87545 4720 0 0 3 0x14200 pgdaemon pagedaemon
24618 241146 0 0 3 0x14200 bored crynlk
54395 36929 0 0 3 0x14200 bored crypto
63945 462106 0 0 3 0x40014200 acpi0 acpi0
41434 143661 0 0 3 0x40014200 idle1
15720 58982 0 0 3 0x14200 bored softnet
66112 50848 0 0 3 0x14200 bored systqmp
98602 181357 0 0 3 0x14200 bored systq
2381 202797 0 0 3 0x40014200 bored softclock
62422 408532 0 0 3 0x40014200 idle0
98526 234433 0 0 3 0x14200 bored smr
1 153875 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 43073 (syz-executor.1) thread 0xffff800020b39c38 (382419)
exclusive rrwlock inode r = 0 (0xfffffd806e2d95f8) locked @ /syzkaller/managers/multicore/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 (0xffffffff8234a3d0) locked @ /syzkaller/managers/multicore/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 9554 6441K 6441K 78643K 11006 0 0
pcb 25 9K 10K 78643K 444 0 0
rtable 100 3K 4K 78643K 800 0 0
ifaddr 71 15K 15K 78643K 266 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1496 0 0
iov 0 0K 16K 78643K 115 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1203 75K 75K 78643K 1889 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 17 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 0K 78643K 141 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 6 17K 21K 78643K 978 0 0
sigio 0 0K 0K 78643K 9 0 0
proc 57 63K 71K 78643K 695 0 0
subproc 64 65538K 67586K 78643K 476 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 144 0 0
in_multi 33 2K 2K 78643K 217 0 0
ether_multi 1 0K 0K 78643K 10 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 347 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 92 21K 29K 78643K 3984 0 0
UVM aobj 58 3K 3K 78643K 70 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 30 0 0
NDP 16 0K 0K 78643K 88 0 0
temp 199 2380K 2508K 78643K 6595 0 0
kqueue 0 0K 0K 78643K 10 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 16 0 12 1 0 1 1 0 8 0
inpcbpl 280 569 0 562 1 0 1 1 0 8 0
plimitpl 152 57 0 49 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 151 0 111 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 20 0 20 2 2 0 1 0 8 0
tcpcb 544 215 0 211 1 0 1 1 0 8 0
nd6 48 28 0 24 1 0 1 1 0 8 0
ppxss 1128 24 0 24 3 2 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 37 0 25 1 0 1 1 0 8 0
pfstkey 112 37 0 25 1 0 1 1 0 8 0
pfstate 328 37 0 25 2 0 2 2 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 256 692 0 504 13 0 13 13 0 8 0
art_table 32 693 0 504 2 0 2 2 0 8 0
art_node 16 148 0 114 1 0 1 1 0 8 0
sysvmsgpl 40 26 0 13 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 139 0 129 1 0 1 1 0 8 0
shmpl 112 68 0 12 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 3134 0 1680 48 0 48 48 0 8 1
ffsino 272 3134 0 1680 98 0 98 98 0 8 1
nchpl 144 4690 0 3032 63 1 62 62 0 8 0
uvmvnodes 72 3451 0 0 63 0 63 63 0 8 0
vnodes 200 3451 0 0 182 0 182 182 0 8 0
namei 1024 14524 0 14523 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 15316 0 15316 17 16 1 6 0 8 1
sigapl 432 1143 0 1127 2 0 2 2 0 8 0
futexpl 56 10983 0 10983 1 0 1 1 0 8 1
knotepl 112 464 0 445 1 0 1 1 0 8 0
kqueuepl 104 221 0 217 1 0 1 1 0 8 0
pipepl 112 780 0 761 3 2 1 2 0 8 0
fdescpl 488 1144 0 1127 4 1 3 3 0 8 0
filepl 152 6938 0 6833 6 1 5 6 0 8 0
lockfpl 104 364 0 363 2 1 1 1 0 8 0
lockfspl 32 497 0 496 2 1 1 1 0 8 0
sessionpl 112 32 0 21 1 0 1 1 0 8 0
pgrppl 48 39 0 28 1 0 1 1 0 8 0
ucredpl 96 1583 0 1574 1 0 1 1 0 8 0
zombiepl 144 1127 0 1127 2 1 1 1 0 8 1
processpl 840 1160 0 1127 4 0 4 4 0 8 0
procpl 600 3051 0 3005 5 1 4 5 0 8 0
srpgc 64 72 0 72 5 5 0 1 0 8 0
sosppl 128 16 0 16 4 4 0 1 0 8 0
sockpl 384 942 0 923 3 0 3 3 0 8 1
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 10 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 133 0 0 16 0 16 16 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 195 0 0 10 1 9 9 0 8 0
bufpl 256 9109 0 2085 440 0 440 440 0 8 0
anonpl 16 117986 0 109285 66 17 49 49 0 125 12
amapchunkpl 152 6307 0 6220 10 5 5 9 0 158 0
amappl16 192 4781 0 4306 48 16 32 36 0 8 8
amappl15 184 298 0 292 1 0 1 1 0 8 0
amappl14 176 303 0 300 2 1 1 1 0 8 0
amappl13 168 210 0 205 1 0 1 1 0 8 0
amappl12 160 159 0 158 2 1 1 1 0 8 0
amappl11 152 265 0 248 1 0 1 1 0 8 0
amappl10 144 308 0 305 1 0 1 1 0 8 0
amappl9 136 656 0 652 1 0 1 1 0 8 0
amappl8 128 248 0 231 1 0 1 1 0 8 0
amappl7 120 56 0 50 1 0 1 1 0 8 0
amappl6 112 66 0 59 1 0 1 1 0 8 0
amappl5 104 330 0 316 1 0 1 1 0 8 0
amappl4 96 1297 0 1264 2 1 1 2 0 8 0
amappl3 88 394 0 388 1 0 1 1 0 8 0
amappl2 80 8932 0 8862 2 0 2 2 0 8 0
amappl1 72 34750 0 34295 25 15 10 20 0 8 0
amappl 72 3379 0 3342 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 69 0 12 1 0 1 1 0 8 0
uaddrrnd 24 1144 0 1127 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1144 0 1127 1 0 1 1 0 8 0
vmmpekpl 168 13503 0 13478 2 0 2 2 0 8 0
vmmpepl 168 129184 0 127618 113 34 79 81 0 357 9
vmsppl 360 1143 0 1127 2 0 2 2 0 8 0
pdppl 4096 2296 0 2254 6 0 6 6 0 8 0
pvpl 32 365837 0 353754 168 40 128 128 0 265 27
pmappl 224 1143 0 1127 3 2 1 2 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 599 0 5 17 0 17 17 0 8 0