login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/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
51415 81580 32767 0x10 0x4000000 0 syz-executor.0
*225637 81580 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(ffffffff81f7c61c,ffffffff81f53f4e,2b1,ffffffff81f4e3ff) 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(ffffffff81f7c61c,ffffffff81f53f4e,2b1,ffffffff81f4e3ff) 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 0xffff800020c59480
rbx 0xffff800020c59530
rdx 0xffffffff81f1e360 cmd0646_9_tim_udma+0x129e0
rcx 0
rax 0
r8 0xffffffff813481d3 kprintf+0x183
r9 0x1
r10 0x25
r11 0xa803675a0a6c27a7
r12 0x3000000008
r13 0xffff800020c59490
r14 0x104
r15 0x1
rip 0xffffffff81266358 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020c59470
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=225637 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020b74bd0,0xffff800020b74028
process=0xffff800020b3a010 user=0xffff800020c54000, vmspace=0xfffffd807effe438
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
9857 443947 287 32767 2 0x10 syz-executor.1
9857 81722 287 32767 3 0x4000090 fsleep syz-executor.1
81580 83280 8208 32767 2 0x10 syz-executor.0
81580 51415 8208 32767 7 0x4000010 syz-executor.0
*81580 225637 8208 32767 7 0x4000010 syz-executor.0
81580 444931 8208 32767 2 0x4000010 syz-executor.0
287 426755 93157 32767 3 0x90 nanosleep syz-executor.1
93157 461187 49423 0 3 0x82 wait syz-executor.1
8208 336702 10003 32767 3 0x90 nanosleep syz-executor.0
10003 178996 49423 0 3 0x82 wait syz-executor.0
49423 493150 1938 0 3 0x82 thrsleep syz-fuzzer
49423 122182 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 497942 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 177763 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 121196 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 215587 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 102307 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 448856 1938 0 3 0x4000082 thrsleep syz-fuzzer
49423 139452 1938 0 3 0x4000082 kqread syz-fuzzer
49423 388045 1938 0 3 0x4000082 thrsleep syz-fuzzer
1938 246278 33339 0 3 0x10008a pause ksh
33339 323488 32028 0 3 0x92 select sshd
74952 65939 1 0 3 0x100083 ttyin getty
32028 365463 1 0 3 0x80 select sshd
19156 405099 83518 73 3 0x100090 kqread syslogd
83518 223590 1 0 3 0x100082 netio syslogd
40024 69194 1 77 3 0x100090 poll dhclient
97819 19964 1 0 3 0x80 poll dhclient
84727 54173 0 0 2 0x14200 zerothread
52702 33287 0 0 3 0x14200 aiodoned aiodoned
64088 452595 0 0 3 0x14200 syncer update
74573 207889 0 0 3 0x14200 cleaner cleaner
83429 254843 0 0 3 0x14200 reaper reaper
69127 145041 0 0 3 0x14200 pgdaemon pagedaemon
37455 195082 0 0 3 0x14200 bored crynlk
48344 64325 0 0 3 0x14200 bored crypto
15824 401164 0 0 3 0x40014200 acpi0 acpi0
62241 334340 0 0 3 0x40014200 idle1
54295 219682 0 0 3 0x14200 bored softnet
47162 361350 0 0 3 0x14200 bored systqmp
37853 190304 0 0 3 0x14200 bored systq
51386 37953 0 0 3 0x40014200 bored softclock
78114 9349 0 0 3 0x40014200 idle0
25344 38796 0 0 3 0x14200 bored smr
1 516436 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 81580 (syz-executor.0) thread 0xffff800020b74978 (51415)
exclusive rrwlock inode r = 0 (0xfffffd807c8281b0) 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 cache_lookup+0x300 sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1d7 sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90
#9 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523
#10 namei+0x4b2 sys/kern/vfs_lookup.c:224
#11 vn_open+0x157 sys/kern/vfs_vnops.c:103
#12 doopenat+0x2ca sys/kern/vfs_syscalls.c:1045
#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 (0xfffffd807c828f80) 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 vn_open+0x157 sys/kern/vfs_vnops.c:103
#8 doopenat+0x2ca sys/kern/vfs_syscalls.c:1045
#9 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#9 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#10 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82397440) 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 9457 6320K 6320K 78643K 10544 0 0
pcb 25 9K 9K 78643K 61 0 0
rtable 97 3K 3K 78643K 169 0 0
ifaddr 34 9K 9K 78643K 34 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 2K 78643K 15 0 0
iov 0 0K 8K 78643K 1 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1200 75K 75K 78643K 1213 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 1K 78643K 2 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 4 0K 0K 78643K 4 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12628 0 0
file desc 8 25K 25K 78643K 48 0 0
proc 44 50K 58K 78643K 261 0 0
subproc 68 69634K 69634K 78643K 68 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 10 0 0
in_multi 33 2K 2K 78643K 37 0 0
ether_multi 1 0K 0K 78643K 2 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 165 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 79 20K 20K 78643K 875 0 0
UVM aobj 2 2K 2K 78643K 4 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 5 0K 0K 78643K 9 0 0
temp 80 2364K 2428K 78643K 2943 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 4 0 0 1 0 1 1 0 8 0
inpcbpl 280 45 0 37 1 0 1 1 0 8 0
plimitpl 152 17 0 8 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 41 0 1 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 27 0 27 1 0 1 1 0 8 1
tcpcb 544 16 0 12 1 0 1 1 0 8 0
nd6 48 4 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 184 0 0 12 0 12 12 0 8 0
art_table 32 185 0 0 2 0 2 2 0 8 0
art_node 16 40 0 6 1 0 1 1 0 8 0
semapl 112 2 0 0 1 0 1 1 0 8 0
shmpl 112 2 0 2 1 0 1 1 0 8 1
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1471 0 59 46 0 46 46 0 8 0
ffsino 272 1471 0 59 95 0 95 95 0 8 0
nchpl 144 1732 0 107 61 0 61 61 0 8 0
uvmvnodes 72 1514 0 0 28 0 28 28 0 8 0
vnodes 200 1514 0 0 80 0 80 80 0 8 0
namei 1024 4216 0 4215 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 4237 0 4237 7 4 3 6 0 8 3
sigapl 432 218 0 202 2 0 2 2 0 8 0
futexpl 56 414 0 413 1 0 1 1 0 8 0
knotepl 112 56 0 37 1 0 1 1 0 8 0
kqueuepl 104 12 0 10 1 0 1 1 0 8 0
pipepl 112 162 0 143 2 1 1 1 0 8 0
fdescpl 488 219 0 202 3 0 3 3 0 8 0
filepl 152 1157 0 1056 6 1 5 5 0 8 1
lockfpl 104 21 0 21 2 1 1 1 0 8 1
lockfspl 32 44 0 44 2 1 1 1 0 8 1
sessionpl 112 17 0 7 1 0 1 1 0 8 0
pgrppl 48 17 0 7 1 0 1 1 0 8 0
ucredpl 96 133 0 124 1 0 1 1 0 8 0
zombiepl 144 202 0 202 2 1 1 1 0 8 1
processpl 840 234 0 202 4 0 4 4 0 8 0
procpl 600 315 0 270 4 0 4 4 0 8 0
sockpl 384 93 0 73 3 0 3 3 0 8 1
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 114 0 0 14 0 14 14 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 135 0 0 8 0 8 8 0 8 0
bufpl 256 5579 0 1122 279 0 279 279 0 8 0
anonpl 16 28848 0 22195 32 1 31 31 0 125 4
amapchunkpl 152 869 0 782 5 0 5 5 0 158 1
amappl16 192 572 0 234 20 0 20 20 0 8 3
amappl15 184 48 0 44 1 0 1 1 0 8 0
amappl14 176 20 0 19 2 1 1 1 0 8 0
amappl13 168 41 0 35 1 0 1 1 0 8 0
amappl12 160 22 0 19 2 1 1 1 0 8 0
amappl11 152 17 0 6 1 0 1 1 0 8 0
amappl10 144 60 0 57 2 1 1 1 0 8 0
amappl9 136 550 0 543 1 0 1 1 0 8 0
amappl8 128 111 0 97 1 0 1 1 0 8 0
amappl7 120 25 0 23 1 0 1 1 0 8 0
amappl6 112 53 0 46 1 0 1 1 0 8 0
amappl5 104 124 0 113 1 0 1 1 0 8 0
amappl4 96 417 0 388 2 1 1 2 0 8 0
amappl3 88 116 0 111 1 0 1 1 0 8 0
amappl2 80 906 0 844 2 0 2 2 0 8 0
amappl1 72 13304 0 12849 24 9 15 19 0 8 6
amappl 72 516 0 480 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 3 0 2 1 0 1 1 0 8 0
uaddrrnd 24 219 0 202 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 219 0 202 1 0 1 1 0 8 0
vmmpekpl 168 5790 0 5769 2 0 2 2 0 8 0
vmmpepl 168 30249 0 28792 82 12 70 72 0 357 6
vmsppl 360 218 0 202 2 0 2 2 0 8 0
pdppl 4096 446 0 404 6 0 6 6 0 8 0
pvpl 32 114581 0 104657 105 4 101 102 0 265 20
pmappl 224 218 0 202 1 0 1 1 0 8 0
extentpl 40 39 0 25 1 0 1 1 0 8 0
phpool 112 426 0 3 13 0 13 13 0 8 0