���jV���;�þ¯ï¿½ï¿½ï¿½ï¿½ï¿½`Õpl…ýÿÿÿÿÿÿÿ�(�����(������jV���;�þ¯ï¿½ï¿½ï¿½ï¿½ï¿½`Õpl…ýÿÿÿÿÿÿÿ�(�����(���panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveipanic: 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
356172 34207 0 0 0x4000000 0 syz-executor.1
*457995 72219 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(ffffffff81f7e6d6,ffffffff81f69c32,2b1,ffffffff81f4f134) 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(ffffffff81f7e6d6,ffffffff81f69c32,2b1,ffffffff81f4f134) 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 0xffff800020c5b080
rbx 0xffff800020c5b130
rdx 0xffffffff81f8c339 apollo_pio_rec+0x95b5
rcx 0
rax 0
r8 0xffffffff818d1a13 kprintf+0x183
r9 0x1
r10 0x25
r11 0xcf26a9b66f36aba
r12 0x3000000008
r13 0xffff800020c5b090
r14 0x104
r15 0x1
rip 0xffffffff814367b8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c5b070
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=457995 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020b7ce28,0xffff800020b7c280
process=0xffff800020b8c360 user=0xffff800020c56000, vmspace=0xfffffd807effd708
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
34207 378979 37685 0 2 0 syz-executor.1
34207 356172 37685 0 7 0x4000000 syz-executor.1
72219 412917 32169 0 2 0 syz-executor.0
72219 504753 32169 0 3 0x4000080 ttyout syz-executor.0
*72219 457995 32169 0 7 0x4000000 syz-executor.0
16814 452674 0 0 3 0x14200 bored sosplice
32169 273491 50121 0 3 0x82 nanosleep syz-executor.0
37685 295313 50121 0 2 0x2 syz-executor.1
50121 326844 87202 0 3 0x82 kqread syz-fuzzer
50121 227855 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 165858 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 292469 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 230650 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 296004 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 365079 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 499043 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 320086 87202 0 3 0x4000082 thrsleep syz-fuzzer
50121 167644 87202 0 3 0x4000082 thrsleep syz-fuzzer
87202 92606 58677 0 3 0x10008a pause ksh
58677 3130 86740 0 3 0x92 select sshd
1107 237806 1 0 3 0x100083 ttyin getty
86740 299346 1 0 3 0x80 select sshd
7159 336840 37284 74 3 0x100092 bpf pflogd
37284 420034 1 0 3 0x80 netio pflogd
74243 517547 24000 73 3 0x100090 kqread syslogd
24000 242563 1 0 3 0x100082 netio syslogd
90035 390957 1 77 3 0x100090 poll dhclient
13055 221617 1 0 3 0x80 poll dhclient
67771 459463 0 0 2 0x14200 zerothread
36714 103445 0 0 3 0x14200 aiodoned aiodoned
80341 297146 0 0 3 0x14200 syncer update
81193 58687 0 0 3 0x14200 cleaner cleaner
12956 214972 0 0 3 0x14200 reaper reaper
45284 291863 0 0 3 0x14200 pgdaemon pagedaemon
581 426561 0 0 3 0x14200 bored crynlk
10243 113857 0 0 3 0x14200 bored crypto
38164 257487 0 0 3 0x40014200 acpi0 acpi0
14910 33856 0 0 3 0x40014200 idle1
69022 491068 0 0 3 0x14200 bored softnet
19802 174959 0 0 3 0x14200 bored systqmp
22178 200741 0 0 3 0x14200 bored systq
32314 207541 0 0 3 0x40014200 bored softclock
76568 346534 0 0 3 0x40014200 idle0
10463 231350 0 0 3 0x14200 bored smr
1 450689 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 34207 (syz-executor.1) thread 0xffff800020b7c270 (356172)
exclusive rrwlock inode r = 0 (0xfffffd807ca12708) 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 (0xffffffff82349ce8) 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 9498 6399K 6404K 78643K 10653 0 0
pcb 25 9K 10K 78643K 149 0 0
rtable 100 3K 4K 78643K 266 0 0
ifaddr 52 12K 13K 78643K 88 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1472 0 0
iov 0 0K 16K 78643K 16 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1201 75K 75K 78643K 1310 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 4 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 1K 1K 78643K 24 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 6 17K 21K 78643K 164 0 0
proc 57 63K 71K 78643K 380 0 0
subproc 64 65538K 67586K 78643K 102 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 24 0 0
in_multi 33 2K 2K 78643K 48 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 48 212K 212K 78643K 48 0 0
exec 0 0K 1K 78643K 211 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 82 20K 21K 78643K 1373 0 0
UVM aobj 8 2K 2K 78643K 9 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 14 0 0
NDP 10 0K 0K 78643K 24 0 0
temp 122 2366K 2433K 78643K 3674 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 5 0 1 1 0 1 1 0 8 0
inpcbpl 280 119 0 112 1 0 1 1 0 8 0
plimitpl 152 21 0 13 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 50 0 10 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 49 0 49 1 1 0 1 0 8 0
tcpcb 544 34 0 30 1 0 1 1 0 8 0
nd6 48 6 0 2 1 0 1 1 0 8 0
ppxss 1128 7 0 7 2 1 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 15 0 2 1 0 1 1 0 8 0
pfstkey 112 15 0 2 1 0 1 1 0 8 0
pfstate 328 15 0 2 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 256 226 0 41 12 0 12 12 0 8 0
art_table 32 227 0 41 2 0 2 2 0 8 0
art_node 16 49 0 15 1 0 1 1 0 8 0
semapl 112 22 0 12 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1708 0 282 47 0 47 47 0 8 0
ffsino 272 1708 0 282 96 0 96 96 0 8 0
nchpl 144 2148 0 514 61 0 61 61 0 8 0
uvmvnodes 72 1784 0 0 33 0 33 33 0 8 0
vnodes 200 1784 0 0 94 0 94 94 0 8 0
namei 1024 5840 0 5839 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 5345 0 5345 10 8 2 6 0 8 2
sigapl 432 360 0 344 2 0 2 2 0 8 0
futexpl 56 1858 0 1858 1 0 1 1 0 8 1
knotepl 112 98 0 79 1 0 1 1 0 8 0
kqueuepl 104 36 0 34 1 0 1 1 0 8 0
pipepl 112 242 0 223 2 1 1 1 0 8 0
fdescpl 488 361 0 344 3 0 3 3 0 8 0
filepl 152 2067 0 1965 5 0 5 5 0 8 1
lockfpl 104 55 0 55 2 1 1 1 0 8 1
lockfspl 32 77 0 77 2 1 1 1 0 8 1
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 23 0 12 1 0 1 1 0 8 0
ucredpl 96 330 0 321 1 0 1 1 0 8 0
zombiepl 144 344 0 344 2 1 1 1 0 8 1
processpl 840 377 0 344 4 0 4 4 0 8 0
procpl 600 708 0 663 4 0 4 4 0 8 0
srpgc 64 6 0 6 1 1 0 1 0 8 0
sosppl 128 3 0 3 1 1 0 1 0 8 0
sockpl 384 233 0 214 3 0 3 3 0 8 1
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 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 2 0 0 1 0 1 1 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 129 0 0 16 0 16 16 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 148 0 0 9 0 9 9 0 8 0
bufpl 256 5936 0 1143 300 0 300 300 0 8 0
anonpl 16 45134 0 36446 53 2 51 51 0 125 16
amapchunkpl 152 1624 0 1533 6 1 5 5 0 158 0
amappl16 192 1386 0 932 34 0 34 34 0 8 11
amappl15 184 63 0 58 1 0 1 1 0 8 0
amappl14 176 99 0 95 2 1 1 1 0 8 0
amappl13 168 26 0 23 1 0 1 1 0 8 0
amappl12 160 66 0 62 1 0 1 1 0 8 0
amappl11 152 26 0 11 1 0 1 1 0 8 0
amappl10 144 83 0 78 1 0 1 1 0 8 0
amappl9 136 580 0 577 1 0 1 1 0 8 0
amappl8 128 134 0 122 1 0 1 1 0 8 0
amappl7 120 43 0 39 1 0 1 1 0 8 0
amappl6 112 58 0 51 1 0 1 1 0 8 0
amappl5 104 177 0 162 1 0 1 1 0 8 0
amappl4 96 582 0 552 2 1 1 2 0 8 0
amappl3 88 191 0 185 1 0 1 1 0 8 0
amappl2 80 1975 0 1912 2 0 2 2 0 8 0
amappl1 72 17240 0 16780 26 16 10 20 0 8 0
amappl 72 946 0 908 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 8 0 1 1 0 1 1 0 8 0
uaddrrnd 24 361 0 344 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 361 0 344 1 0 1 1 0 8 0
vmmpekpl 168 7019 0 6993 2 0 2 2 0 8 0
vmmpepl 168 45963 0 44413 99 21 78 78 0 357 10
vmsppl 360 360 0 344 2 0 2 2 0 8 0
pdppl 4096 730 0 688 6 0 6 6 0 8 0
pvpl 32 155955 0 143934 143 11 132 132 0 265 35
pmappl 224 360 0 344 2 1 1 2 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 454 0 4 13 0 13 13 0 8 0