panic: vrele: v_writecount != 0
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 65669 39063 0 0x1004 0 1K syz-executor
55892 64128 0 0x14000 0x40000200 0 softclock
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344bdd9) at panic+0x1e5 sys/kern/subr_prf.c:198
vrele(fffffd806d4f62b8) at vrele+0x274 sys/kern/vfs_subr.c:831
uvn_detach(fffffd806d479980) at uvn_detach+0x1b7 sys/uvm/uvm_vnode.c:391
uvm_unmap_detach(ffff80002a329c98,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364
uvmspace_exec(ffff80002a2aaf78,1000,7f7fffffc000) at uvmspace_exec+0x3b7 sys/uvm/uvm_map.c:3393
sys_execve(ffff80002a2aaf78,ffff80002a32a330,ffff80002a32a280) at sys_execve+0xae0 sys/kern/kern_exec.c:453
syscall(ffff80002a32a330) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a32a330) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70b67a34c350, count: 6
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
*cpu1: vrele: v_writecount != 0
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344bdd9) at panic+0x1e5 sys/kern/subr_prf.c:198
vrele(fffffd806d4f62b8) at vrele+0x274 sys/kern/vfs_subr.c:831
uvn_detach(fffffd806d479980) at uvn_detach+0x1b7 sys/uvm/uvm_vnode.c:391
uvm_unmap_detach(ffff80002a329c98,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364
uvmspace_exec(ffff80002a2aaf78,1000,7f7fffffc000) at uvmspace_exec+0x3b7 sys/uvm/uvm_map.c:3393
sys_execve(ffff80002a2aaf78,ffff80002a32a330,ffff80002a32a280) at sys_execve+0xae0 sys/kern/kern_exec.c:453
syscall(ffff80002a32a330) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a32a330) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70b67a34c350, count: -9
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a329ae0
rbx 0xffff8000299dedd7
rdx 0
rcx 0xffff80002a2aaf78
rax 0xffff8000299ddff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x2a9e606f7557bff6
r11 0x5ce548479013f41
r12 0xffff8000299debd8
r13 0
r14 0
r15 0x1
rip 0xffffffff81ba9385 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a329ad0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=65669 pid=39063 tcnt=1 stat=onproc
flags process=1004<INEXEC,SINGLEEXIT> proc=0
runpri=50, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80002a2aaf78 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a2aa018,0xffff80002a2abc58
process=0xffff8000ffff66c8 user=0xffff80002a325000, vmspace=0xfffffd806c176990
estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
73826 112612 56188 32767 2 0x10 syz-executor
*39063 65669 40719 0 7 0x1004 syz-executor
24527 306236 50066 32767 2 0x10 syz-executor
24527 403540 50066 32767 3 0x4000010 getblk syz-executor
24527 396024 50066 32767 3 0x4000090 fsleep syz-executor
89211 183229 32015 32767 3 0x90 piperd syz-executor
32015 326166 40719 0 3 0x82 wait syz-executor
21801 123954 0 0 3 0x14200 bored sosplice
43827 400440 11762 0 3 0x82 sbwait sshd-session
44896 483938 80170 32767 3 0x90 piperd syz-executor
61289 415189 17582 32767 3 0x90 piperd syz-executor
17405 70883 76673 32767 2 0x10 syz-executor
56188 336069 77045 32767 3 0x90 nanoslp syz-executor
50066 35637 92125 32767 3 0x90 nanoslp syz-executor
80170 331389 40719 0 3 0x82 wait syz-executor
76673 255244 40719 0 3 0x82 wait syz-executor
17582 392189 40719 0 3 0x82 wait syz-executor
77045 417181 40719 0 3 0x82 wait syz-executor
92125 47294 40719 0 3 0x82 wait syz-executor
40719 227308 74095 0 3 0x82 nanoslp syz-executor
74095 429576 88227 0 3 0x10008a sigsusp ksh
88227 446266 24928 0 3 0x98 kqread sshd-session
24928 415620 11762 0 3 0x92 kqread sshd-session
70218 159780 1 0 3 0x100083 ttyin getty
11762 510164 1 0 3 0x88 kqread sshd
36830 188808 38676 73 3 0x1100090 kqread syslogd
38676 180742 1 0 3 0x100082 sbwait syslogd
96072 338009 1 0 3 0x100080 kqread resolvd
68418 132739 64363 77 3 0x100092 kqread dhcpleased
13575 420014 64363 77 3 0x100092 kqread dhcpleased
64363 232418 1 0 3 0x80 kqread dhcpleased
24038 214766 0 0 3 0x14200 bored smr
41420 56118 0 0 2 0x14200 zerothread
6273 32380 0 0 3 0x14200 aiodoned aiodoned
45828 261806 0 0 3 0x14200 syncer update
10650 200428 0 0 3 0x14200 cleaner cleaner
20008 378146 0 0 3 0x14200 reaper reaper
39240 265200 0 0 3 0x14200 pgdaemon pagedaemon
82090 290324 0 0 3 0x14200 bored viomb
76751 152672 0 0 3 0x40014200 acpi0 acpi0
15850 380759 0 0 3 0x40014200 idle1
81127 347123 0 0 3 0x14200 bored softnet3
74 343612 0 0 3 0x14200 bored softnet2
45963 325104 0 0 3 0x14200 bored softnet1
60540 514432 0 0 3 0x14200 bored softnet0
29049 83003 0 0 3 0x14200 bored systqmp
46429 44689 0 0 3 0x14200 bored systq
15236 65395 0 0 3 0x14200 tmoslp softclockmp
64128 55892 0 0 7 0x40014200 softclock
6991 453980 0 0 3 0x40014200 idle0
1 8915 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 39063 (syz-executor) thread 0xffff80002a2aaf78 (65669)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff839628a8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:579
#2 Xsyscall+0x128
Process 24527 (syz-executor) thread 0xffff80002a2aa2a8 (403540)
exclusive rrwlock inode r = 0 (0xfffffd806dea5c08)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vget+0x2bd sys/kern/vfs_subr.c:693
#6 ffs_sync_vnode+0x1aa sys/ufs/ffs/ffs_vfsops.c:1076
#7 vfs_mount_foreach_vnode+0x65 sys/kern/vfs_subr.c:-1
#8 ffs_sync+0x146 sys/ufs/ffs/ffs_vfsops.c:1131
#9 sys_sync+0x104 sys/kern/vfs_syscalls.c:535
#10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
#11 Xsyscall+0x128
shared rwlock vfslock r = 0 (0xffff800000b49860)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x36e sys/kern/kern_rwlock.c:397
#2 vfs_busy+0x94 sys/kern/vfs_subr.c:246
#3 sys_sync+0x5d sys/kern/vfs_syscalls.c:528
#4 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
#5 Xsyscall+0x128
Process 17405 (syz-executor) thread 0xffff8000ffff1210 (70883)
exclusive rrwlock inode r = 0 (0xfffffd8067b20528)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
#4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159
#5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230
#6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112
#8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394
#9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109
#10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806cc1d8b8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
#6 namei+0x7aa sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094
#8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10210 10954K 10966K 166960K 11298 0
pcb 17 14K 16K 166960K 19 0
rtable 194 5K 7K 166960K 480 0
pf 27 16K 16K 166960K 33 0
ifaddr 34 6K 7K 166960K 48 0
ifgroup 42 1K 2K 166960K 54 0
sysctl 4 1K 9K 166960K 9 0
counters 64 36K 36K 166960K 70 0
ioctlops 0 0K 2K 166960K 43 0
iov 0 0K 24K 166960K 28 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1334 84K 84K 166960K 1683 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 12 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 40 0
dirhash 12 2K 2K 166960K 33 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 58K 121K 166960K 664 0
sigio 0 0K 0K 166960K 6 0
proc 58 79K 115K 166960K 575 0
subproc 54 3K 4K 166960K 315 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 80 0
in_multi 77 5K 7K 166960K 127 0
ether_multi 1 0K 0K 166960K 2 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 223 996K 996K 166960K 223 0
exec 1 0K 1K 166960K 426 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 194 150K 190K 166960K 7187 0
UVM aobj 18 2K 2K 166960K 18 0
pinsyscall 41 82K 112K 166960K 1759 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 31 0
NDP 11 0K 2K 166960K 30 0
temp 58 8685K 8809K 166960K 6491 0
kqueue 13 20K 29K 166960K 106 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 84 0 81 1 0 1 1 0 8 0
rtentry 176 129 0 39 6 0 6 6 0 8 0
unpcb 144 503 0 486 4 3 1 4 0 8 0
syncache 336 16 0 16 1 0 1 1 0 8 1
tcpqe 32 2 0 2 1 0 1 1 0 8 1
tcpcb 808 316 0 309 8 6 2 8 0 8 1
arp 128 20 0 6 1 0 1 1 0 8 0
ipq 40 2 0 1 1 0 1 1 0 8 0
ipqe 40 4 0 3 1 0 1 1 0 8 0
inpcb 328 850 0 839 16 8 8 16 0 8 6
nd6 144 34 0 14 2 0 2 2 0 8 1
kcovpl 48 35 0 29 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 515 0 145 30 1 29 30 0 8 5
art_table 32 516 0 145 4 0 4 4 0 8 0
art_node 16 128 0 46 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 9 1 0 1 1 0 8 0
semapl 112 38 0 28 1 0 1 1 0 8 0
shmpl 112 15 0 0 1 0 1 1 0 8 0
dirhash 1024 31 0 14 3 0 3 3 0 8 0
dino2pl 256 2292 0 751 97 0 97 97 0 8 0
ffsino 288 2292 0 751 111 0 111 111 0 8 0
nchpl 144 3082 0 1379 64 0 64 64 0 8 0
uvmvnodes 80 2616 0 0 54 0 54 54 0 8 0
vnodes 216 2616 0 0 146 0 146 146 0 8 0
namei 1024 10345 0 10343 1 0 1 1 0 8 0
percpumem 16 50 0 3 1 0 1 1 0 8 0
kstatmem 264 26 0 6 2 0 2 2 0 8 0
scxspl 216 10454 0 10451 10 8 2 8 1 8 1
plimitpl 152 196 0 176 2 0 2 2 0 8 1
sigapl 424 897 0 848 7 0 7 7 0 8 0
knotepl 120 388 0 0 12 0 12 12 0 8 0
kqueuepl 224 169 0 160 2 1 1 2 0 8 0
pipepl 336 254 0 227 6 3 3 6 0 8 0
fdescpl 520 878 0 848 3 0 3 3 0 8 0
filepl 160 5283 0 5097 17 1 16 17 0 8 6
lockfpl 104 100 0 98 1 0 1 1 0 8 0
lockfspl 48 46 0 44 1 0 1 1 0 8 0
sessionpl 144 61 0 46 1 0 1 1 0 8 0
pgrppl 48 103 0 81 1 0 1 1 0 8 0
ucredpl 104 852 0 835 1 0 1 1 0 8 0
zombiepl 144 848 0 848 1 0 1 1 0 8 1
processpl 1240 897 0 848 5 0 5 5 0 8 0
procpl 656 1639 0 1588 7 0 7 7 0 8 1
sosppl 168 4 0 4 1 0 1 1 0 8 1
sockpl 728 1448 0 1403 20 8 12 20 0 8 7
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 128 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 21 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 337 0 0 22 0 22 22 0 8 0
bufpl 280 3121 0 113 215 0 215 215 0 8 0
anonpl 32 5815 0 0 47 0 47 47 0 246 0
amapchunkpl 152 23827 0 23463 45 2 43 45 0 158 22
amappl16 200 2519 0 2501 7 2 5 5 0 8 3
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 168 0 157 1 0 1 1 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 1507 0 1478 2 0 2 2 0 8 0
amappl11 160 43 0 33 1 0 1 1 0 8 0
amappl10 152 5 0 5 1 1 0 1 0 8 0
amappl9 144 267 0 267 1 1 0 1 0 8 0
amappl8 136 31 0 29 1 0 1 1 0 8 0
amappl7 128 109 0 98 1 0 1 1 0 8 0
amappl6 120 197 0 192 1 0 1 1 0 8 0
amappl5 112 114 0 108 1 0 1 1 0 8 0
amappl4 104 332 0 316 1 0 1 1 0 8 0
amappl3 96 4184 0 4099 4 0 4 4 0 8 0
amappl2 88 734 0 673 2 0 2 2 0 8 0
amappl1 80 12899 0 12268 17 0 17 17 0 8 0
amappl 88 6375 0 6249 5 0 5 5 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 17 0 0 1 0 1 1 0 8 0
uaddrrnd 24 878 0 848 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 878 0 848 1 0 1 1 0 8 0
vmmpekpl 168 10378 0 10331 3 0 3 3 0 8 0
vmmpepl 168 64884 0 63041 112 2 110 112 0 357 9
vmsppl 480 877 0 848 7 1 6 6 0 8 0
rwobjpl 72 22854 0 19361 67 0 67 67 0 8 2
pdppl 4096 1764 0 1696 118 40 78 96 0 8 10
pvpl 32 15031 0 0 122 0 122 122 0 265 0
pmappl 256 877 0 848 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 427 0 53 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff837f0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff839626a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:129 [inline]
__mp_lock(ffffffff839626a0) at __mp_lock+0x199 sys/kern/kern_lock.c:160
intr_handler(ffff80002a1f89b0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff839626a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:129 [inline]
__mp_lock(ffffffff839626a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:160
__mp_acquire_count(ffffffff839626a0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2da sys/kern/kern_synch.c:366
softclock_thread_run(ffffffff83864478) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:845
softclock_thread(ffff8000fffff480) at softclock_thread+0x10a sys/kern/kern_timeout.c:867
end trace frame: 0x0, count: 3
ddb{0}> trace
x86_ipi_db(ffffffff837f0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff839626a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:129 [inline]
__mp_lock(ffffffff839626a0) at __mp_lock+0x199 sys/kern/kern_lock.c:160
intr_handler(ffff80002a1f89b0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff839626a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:129 [inline]
__mp_lock(ffffffff839626a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:160
__mp_acquire_count(ffffffff839626a0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2da sys/kern/kern_synch.c:366
softclock_thread_run(ffffffff83864478) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:845
softclock_thread(ffff8000fffff480) at softclock_thread+0x10a sys/kern/kern_timeout.c:867
end trace frame: 0x0, count: -12
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344bdd9) at panic+0x1e5 sys/kern/subr_prf.c:198
vrele(fffffd806d4f62b8) at vrele+0x274 sys/kern/vfs_subr.c:831
uvn_detach(fffffd806d479980) at uvn_detach+0x1b7 sys/uvm/uvm_vnode.c:391
uvm_unmap_detach(ffff80002a329c98,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364
uvmspace_exec(ffff80002a2aaf78,1000,7f7fffffc000) at uvmspace_exec+0x3b7 sys/uvm/uvm_map.c:3393
sys_execve(ffff80002a2aaf78,ffff80002a32a330,ffff80002a32a280) at sys_execve+0xae0 sys/kern/kern_exec.c:453
syscall(ffff80002a32a330) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a32a330) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70b67a34c350, count: 6
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344bdd9) at panic+0x1e5 sys/kern/subr_prf.c:198
vrele(fffffd806d4f62b8) at vrele+0x274 sys/kern/vfs_subr.c:831
uvn_detach(fffffd806d479980) at uvn_detach+0x1b7 sys/uvm/uvm_vnode.c:391
uvm_unmap_detach(ffff80002a329c98,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364
uvmspace_exec(ffff80002a2aaf78,1000,7f7fffffc000) at uvmspace_exec+0x3b7 sys/uvm/uvm_map.c:3393
sys_execve(ffff80002a2aaf78,ffff80002a32a330,ffff80002a32a280) at sys_execve+0xae0 sys/kern/kern_exec.c:453
syscall(ffff80002a32a330) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a32a330) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70b67a34c350, count: -9