uvm_fault(0xfffffd80694e9768, 0x8, 0, 1) -> e
kernel: page fault trapanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 675
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*493585 89266 32767 0x10 0 1 syz-executor.1
143739 94637 32767 0x10 0x4000000 0 syz-executor.5
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278f924) at panic+0x17b sys/kern/subr_prf.c:198
__assert(ffffffff828117b7,ffffffff827d3c47,2a3,ffffffff827c8b74) at __assert+0x29 sys/kern/subr_prf.c:157
proc_trampoline_mp() at proc_trampoline_mp+0x135
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
*cpu0: uvm_fault(0xfffffd80694e9768, 0x8, 0, 1) -> e
cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 675
ddb{1}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278f924) at panic+0x17b sys/kern/subr_prf.c:198
__assert(ffffffff828117b7,ffffffff827d3c47,2a3,ffffffff827c8b74) at __assert+0x29 sys/kern/subr_prf.c:157
proc_trampoline_mp() at proc_trampoline_mp+0x135
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002129f9a0
rbx 0xffff800020d59b8f
rdx 0
rcx 0
rax 0xffff8000212c2860
r8 0x101010101010101
r9 0x8080808080808080
r10 0x991f907d149b7cfb
r11 0xe7611a066adcfac
r12 0xffff800020d59990
r13 0
r14 0xffffffff82ba2990 cpu_info_full_primary+0x2990
r15 0x1
rip 0xffffffff822f3ddc db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff80002129f990
ss 0
db_enter+0x1c: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=493585 stat=onproc
flags process=10<SUGID> proc=0
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000212c2b18,0xffff8000212c3608
process=0xffff800027b4a198 user=0xffff80002129a000, vmspace=0xfffffd806bd15588
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
54685 412527 41997 32767 2 0x10 syz-executor.6
46195 49756 58304 32767 2 0x10 syz-executor.7
*89266 493585 92841 32767 7 0x10 syz-executor.1
94637 444096 28894 32767 2 0x10 syz-executor.5
94637 143739 28894 32767 7 0x4000010 syz-executor.5
94637 239531 28894 32767 2 0x4000010 syz-executor.5
89572 454637 35892 32767 2 0x10 syz-executor.4
89572 106804 35892 32767 3 0x4000090 fsleep syz-executor.4
89572 5508 35892 32767 2 0x4000010 syz-executor.4
77048 142030 80327 32767 2 0x10 syz-executor.3
77048 115571 80327 32767 3 0x4000090 netio syz-executor.3
92841 491095 14810 32767 3 0x90 nanoslp syz-executor.1
14810 303332 50783 0 3 0x82 wait syz-executor.1
41997 415035 63401 32767 2 0x10 syz-executor.6
63401 48245 50783 0 3 0x82 wait syz-executor.6
35892 46268 56059 32767 3 0x90 nanoslp syz-executor.4
56059 274275 50783 0 3 0x82 wait syz-executor.4
80327 230565 57896 32767 3 0x90 nanoslp syz-executor.3
57896 224243 50783 0 3 0x82 wait syz-executor.3
58304 144577 68690 32767 2 0x10 syz-executor.7
68690 171032 50783 0 3 0x82 wait syz-executor.7
20476 378161 70386 32767 2 0x10 syz-executor.2
70386 89606 50783 0 3 0x82 wait syz-executor.2
28894 77462 80236 32767 3 0x90 nanoslp syz-executor.5
80236 25023 50783 0 3 0x82 wait syz-executor.5
58471 147606 91598 32767 2 0x10 syz-executor.0
91598 100097 50783 0 3 0x82 wait syz-executor.0
47194 88668 0 0 3 0x14200 bored sosplice
50783 7194 6018 0 3 0x82 kqread syz-fuzzer
50783 15860 6018 0 3 0x4000082 nanoslp syz-fuzzer
50783 53376 6018 0 3 0x4000082 wait syz-fuzzer
50783 281072 6018 0 3 0x4000082 thrsleep syz-fuzzer
50783 411129 6018 0 3 0x4000082 thrsleep syz-fuzzer
50783 116784 6018 0 3 0x4000082 wait syz-fuzzer
50783 246362 6018 0 3 0x4000082 wait syz-fuzzer
50783 220725 6018 0 3 0x4000082 wait syz-fuzzer
50783 411306 6018 0 3 0x4000082 thrsleep syz-fuzzer
50783 322452 6018 0 3 0x4000082 thrsleep syz-fuzzer
50783 364647 6018 0 3 0x4000082 thrsleep syz-fuzzer
50783 428667 6018 0 3 0x4000082 wait syz-fuzzer
50783 422862 6018 0 3 0x4000082 wait syz-fuzzer
50783 274467 6018 0 3 0x4000082 wait syz-fuzzer
50783 328158 6018 0 3 0x4000082 wait syz-fuzzer
50783 92523 6018 0 3 0x4000082 thrsleep syz-fuzzer
6018 46378 2684 0 3 0x10008a sigsusp ksh
2684 359462 39227 0 3 0x9a kqread sshd
1092 227167 1 0 3 0x100083 ttyin getty
39227 232818 1 0 3 0x88 kqread sshd
4002 53229 91164 73 3 0x1100090 kqread syslogd
91164 252669 1 0 3 0x100082 netio syslogd
46993 281837 1 0 3 0x100080 kqread resolvd
34738 109678 59471 77 3 0x100092 kqread dhcpleased
63740 98086 59471 77 3 0x100092 kqread dhcpleased
59471 384942 1 0 3 0x80 kqread dhcpleased
78545 361125 0 0 3 0x14200 bored smr
7077 34456 0 0 2 0x14200 zerothread
13323 112080 0 0 3 0x14200 aiodoned aiodoned
19250 110284 0 0 3 0x14200 syncer update
17188 88364 0 0 3 0x14200 cleaner cleaner
78421 180407 0 0 3 0x14200 reaper reaper
63549 49276 0 0 3 0x14200 pgdaemon pagedaemon
89475 515193 0 0 3 0x14200 bored viomb
7563 435953 0 0 3 0x40014200 acpi0 acpi0
97189 250538 0 0 3 0x40014200 idle1
34676 423777 0 0 3 0x14200 bored softnet3
97237 144913 0 0 3 0x14200 bored softnet2
7026 416374 0 0 3 0x14200 bored softnet1
4194 37469 0 0 3 0x14200 bored softnet0
89308 463521 0 0 3 0x14200 bored systqmp
36118 109815 0 0 3 0x14200 bored systq
21930 144498 0 0 3 0x40014200 bored softclock
61816 342439 0 0 3 0x40014200 idle0
1 445121 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 94637 (syz-executor.5) thread 0xffff8000212c25a8 (143739)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82cf6d48)
#0 witness_lock+0x44d
#1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2 mi_switch+0x3c3 sys/kern/sched_bsd.c:405
#3 sleep_finish+0x184 sys/kern/kern_synch.c:417
#4 tsleep+0x12b sys/kern/kern_synch.c:155
#5 biowait+0x91 sys/kern/vfs_bio.c:1278
#6 bwrite+0x21f sys/kern/vfs_bio.c:769
#7 VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640
#8 ufs_direnter+0x90a sys/ufs/ufs/ufs_lookup.c:909
#9 ufs_makeinode+0x4cc sys/ufs/ufs/ufs_vnops.c:1855
#10 ufs_symlink+0x4b sys/ufs/ufs/ufs_vnops.c:1369
#11 VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426
#12 dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1802
#13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80660ca1a8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vget+0x200 sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324
#8 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394
#9 ufs_makeinode+0xb2 sys/ufs/ufs/ufs_vnops.c:1817
#10 ufs_symlink+0x4b sys/ufs/ufs/ufs_vnops.c:1369
#11 VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426
#12 dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1802
#13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#14 Xsyscall+0x128
Process 20476 (syz-executor.2) thread 0xffff800021269350 (378161)
exclusive rrwlock inode r = 0 (0xfffffd8064310c50)
#0 witness_lock+0x44d
#1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vget+0x200 sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324
#8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6f5 sys/kern/vfs_lookup.c:566
#11 namei+0x55a sys/kern/vfs_lookup.c:250
#12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1848
#13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80660caa28)
#0 witness_lock+0x44d
#1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418
#6 namei+0x55a sys/kern/vfs_lookup.c:250
#7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1848
#8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#9 Xsyscall+0x128
Process 58471 (syz-executor.0) thread 0xffff8000212685b8 (147606)
exclusive rrwlock inode r = 0 (0xfffffd8076a97810)
#0 witness_lock+0x44d
#1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353
#6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149
#8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388
#9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074
#10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80661024e0)
#0 witness_lock+0x44d
#1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418
#6 namei+0x55a sys/kern/vfs_lookup.c:250
#7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3059
#8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10208 6412K 6419K 78643K 11417 0
pcb 13 12K 14K 78643K 17 0
rtable 246 7K 7K 78643K 3229 0
ifaddr 73 24K 25K 78643K 313 0
sysctl 3 1K 2K 78643K 7 0
counters 60 35K 35K 78643K 138 0
ioctlops 0 0K 2K 78643K 456 0
iov 0 0K 40K 78643K 19908 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1279 80K 80K 78643K 7561 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 455 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 7722 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 24 89K 113K 78643K 30483 0
sigio 0 0K 0K 78643K 503 0
proc 56 78K 103K 78643K 3365 0
subproc 104 6K 6K 78643K 611 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 2550 0
in_multi 99 6K 7K 78643K 961 0
ether_multi 1 0K 0K 78643K 97 0
mrt 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 241 1076K 1076K 78643K 241 0
exec 0 0K 1K 78643K 5389 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 504 99K 995K 78643K 306808 0
UVM aobj 131 4K 4K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 726 0
NDP 11 0K 2K 78643K 144 0
temp 124 5866K 5994K 78643K 75716 0
kqueue 12 18K 28K 78643K 2054 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 4869 0 4866 59 57 2 3 0 8 1
rtentry 112 594 0 478 4 0 4 4 0 8 0
unpcb 144 26755 0 26740 230 229 1 10 0 8 0
syncache 296 218 0 218 52 52 0 1 0 8 0
tcpqe 32 141 0 141 38 38 0 1 0 8 0
tcpcb 776 12036 0 12032 304 297 7 14 0 8 6
arp 120 106 0 86 1 0 1 1 0 8 0
ipq 40 89 0 86 12 11 1 1 0 8 0
ipqe 40 561 0 558 12 11 1 1 0 8 0
inpcb 368 26497 0 26486 380 372 8 14 0 8 6
ip6q 72 10 0 9 4 3 1 1 0 8 0
ip6af 40 24 0 23 4 3 1 1 0 8 0
nd6 136 185 0 157 3 2 1 2 0 8 0
kcovpl 48 47 0 39 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 2385 0 1903 38 7 31 31 0 8 0
art_table 32 2386 0 1903 4 0 4 4 0 8 0
art_node 16 593 0 487 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0
semapl 112 7720 0 7710 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 47940 0 46441 95 0 95 95 0 8 0
ffsino 272 47940 0 46441 101 0 101 101 0 8 0
nchpl 144 94196 0 92554 63 0 63 63 0 8 0
uvmvnodes 80 6339 0 0 130 0 130 130 0 8 0
vnodes 216 6339 0 0 353 0 353 353 0 8 0
namei 1024 318942 0 318938 20 19 1 2 0 8 0
percpumem 16 82 0 39 1 0 1 1 0 8 0
kstatmem 264 100 0 78 2 0 2 2 0 8 0
scxspl 216 277208 0 277208 90 88 2 8 0 8 2
plimitpl 152 5165 0 5142 48 47 1 2 0 8 0
sigapl 424 30694 0 30641 8 1 7 7 0 8 0
futexpl 64 295964 0 295963 12 11 1 1 0 8 0
knotepl 120 1188 0 0 9 0 9 9 0 8 0
kqueuepl 216 8260 0 8251 140 135 5 7 0 8 4
pipepl 320 8468 0 8440 196 193 3 13 0 8 0
fdescpl 496 30676 0 30641 7 2 5 6 0 8 0
filepl 152 233236 0 232996 353 338 15 23 0 8 5
lockfpl 104 18977 0 18975 44 41 3 3 0 8 2
lockfspl 48 4156 0 4154 1 0 1 1 0 8 0
sessionpl 144 62 0 46 1 0 1 1 0 8 0
pgrppl 48 6224 0 6208 1 0 1 1 0 8 0
ucredpl 104 35253 0 35235 1 0 1 1 0 8 0
zombiepl 144 30641 0 30641 2 1 1 1 0 8 1
processpl 1072 30694 0 30641 4 0 4 4 0 8 0
procpl 696 86660 0 86587 47 39 8 9 0 8 0
srpgc 96 1 0 1 1 1 0 1 0 8 0
sosppl 168 867 0 867 52 51 1 1 0 8 1
sockpl 488 59457 0 59432 1133 1122 11 47 0 8 7
mcl64k 65536 33 0 0 5 2 3 3 0 8 0
mcl16k 16384 41 0 0 4 1 3 3 0 8 0
mcl12k 12288 41 0 0 2 0 2 2 0 8 0
mcl9k 9216 25 0 0 2 0 2 2 0 8 0
mcl8k 8192 74 0 0 7 4 3 3 0 8 0
mcl4k 4096 41 0 0 3 0 3 3 0 8 0
mcl2k2 2112 14 0 0 1 0 1 1 0 8 0
mcl2k 2048 674 0 0 55 43 12 55 0 8 0
mtagpl 96 10 0 0 1 0 1 1 0 8 0
mbufpl 256 3841 0 0 227 0 227 227 0 8 0
bufpl 288 54092 0 47753 454 0 454 454 0 8 0
anonpl 24 3163372 0 3149964 307 198 109 119 0 186 0
amapchunkpl 152 1968997 0 1968074 11393 11294 99 4430 0 158 58
amappl16 200 69296 0 68968 327 306 21 33 0 8 0
amappl15 192 16 0 16 3 3 0 1 0 8 0
amappl14 184 308 0 294 2 1 1 2 0 8 0
amappl13 176 27 0 27 5 5 0 1 0 8 0
amappl12 168 31871 0 31835 2 0 2 2 0 8 0
amappl11 160 51 0 41 1 0 1 1 0 8 0
amappl10 152 66 0 57 2 1 1 1 0 8 0
amappl9 144 447 0 447 60 59 1 2 0 8 1
amappl8 136 1313 0 1081 9 0 9 9 0 8 0
amappl7 128 276 0 255 1 0 1 1 0 8 0
amappl6 120 843 0 817 2 1 1 2 0 8 0
amappl5 112 836 0 830 1 0 1 1 0 8 0
amappl4 104 1844 0 1803 2 0 2 2 0 8 0
amappl3 96 187904 0 187815 35 31 4 4 0 8 1
amappl2 88 32915 0 32836 4 2 2 3 0 8 0
amappl1 80 116966 0 116445 22 10 12 22 0 8 0
amappl 88 301851 0 301582 8 0 8 8 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 30676 0 30641 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 30676 0 30641 1 0 1 1 0 8 0
vmmpekpl 168 241728 0 241666 4 0 4 4 0 8 0
vmmpepl 168 1816682 0 1814060 407 279 128 136 0 357 0
vmsppl 464 30675 0 30641 7 2 5 6 0 8 0
rwobjpl 56 446772 0 438782 148 34 114 116 0 8 0
pdppl 4096 61360 0 61282 948 866 82 90 0 8 4
pvpl 32 8857109 0 8837473 917 728 189 357 0 265 0
pmappl 248 30675 0 30641 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2344 0 1316 31 0 31 31 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
x86_ipi_db(ffffffff82ba1ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff80002e45ae60,ffff800000069c00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x23
cnputc(61) at cnputc+0x4f sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724
db_printf(ffffffff827ae017) at db_printf+0x89 sys/kern/subr_prf.c:498
db_ktrap(6,0,ffff80002e45b320) at db_ktrap+0x12c sys/arch/amd64/amd64/db_interface.c:128
end trace frame: 0xffff80002e45b310, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff82ba1ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff80002e45ae60,ffff800000069c00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82cf6b40) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x23
cnputc(61) at cnputc+0x4f sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724
db_printf(ffffffff827ae017) at db_printf+0x89 sys/kern/subr_prf.c:498
db_ktrap(6,0,ffff80002e45b320) at db_ktrap+0x12c sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff80002e45b320) at kerntrap+0x143 sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
fifo_write(ffff80002e45b420) at fifo_write+0x52 sys/miscfs/fifofs/fifo_vnops.c:269
VOP_WRITE(fffffd806bd6ec28,ffff80002e45b4b8,8,fffffd807f7d63a8) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_rdwr(1,fffffd806bd6ec28,ffff8000211d8800,102,0,1,b0812e7d5cab5c98,ffff80002e45b5e0,fffffd806bd6ec28,78) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324
ufs_symlink(ffff80002e45b5e0) at ufs_symlink+0x12d sys/ufs/ufs/ufs_vnops.c:1385
VOP_SYMLINK(fffffd8072980000,ffff80002e45b760,ffff80002e45b790,ffff80002e45b690,ffff8000211d8800) at VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426
dosymlinkat(ffff8000212c25a8,20000000,ffffff9c,20000140) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1802
syscall(ffff80002e45b910) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002e45b910) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4b20f9785f0, count: -24
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x1c: addq $0x8,%rsp
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278f924) at panic+0x17b sys/kern/subr_prf.c:198
__assert(ffffffff828117b7,ffffffff827d3c47,2a3,ffffffff827c8b74) at __assert+0x29 sys/kern/subr_prf.c:157
proc_trampoline_mp() at proc_trampoline_mp+0x135
end trace frame: 0x0, count: 11
ddb{1}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8278f924) at panic+0x17b sys/kern/subr_prf.c:198
__assert(ffffffff828117b7,ffffffff827d3c47,2a3,ffffffff827c8b74) at __assert+0x29 sys/kern/subr_prf.c:157
proc_trampoline_mp() at proc_trampoline_mp+0x135
end trace frame: 0x0, count: -4