panic: tcppa_noiutc:pu kt
erStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*474102 45711 32767 0x10 0x4000000 0 syz-executor.3
83845 18521 0 0x14000 0x200 1 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cfc060) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd805c575420,fffffd80790e6200,fffffd807c6ec100,fffffd8077044500) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029665260,4,ffff80002e4c4fe0,402,ffff80002e4c50d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029665260,ffff80002e4c5088,ffff80002e4c50d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c5150) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c5150) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa7f91165b90, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: tcp_output
cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cfc060) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd805c575420,fffffd80790e6200,fffffd807c6ec100,fffffd8077044500) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029665260,4,ffff80002e4c4fe0,402,ffff80002e4c50d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029665260,ffff80002e4c5088,ffff80002e4c50d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c5150) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c5150) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa7f91165b90, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e4c4ac0
rbx 0xffffffff82934b8f cpu_info_full_primary+0x2b8f
rdx 0xffff800000bfc700
rcx 0
rax 0xffff800029665260
r8 0x101010101010101
r9 0x8080808080808080
r10 0x90e14bdaf412317b
r11 0x413b8d1b15eb39bb
r12 0xffffffff82934990 cpu_info_full_primary+0x2990
r13 0
r14 0
r15 0x1
rip 0xffffffff823fc058 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e4c4ab0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.3) pid=474102 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=79, nice=20
forw=0xffffffffffffffff, list=0xffff80002966c7f0,0xffff8000296642b0
process=0xffff800028249d30 user=0xffff80002e4c0000, vmspace=0xfffffd806b9e8740
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
87023 150890 32241 32767 2 0x10 syz-executor.1
87023 476376 32241 32767 3 0x4000090 fsleep syz-executor.1
76520 521930 62457 32767 2 0x10 syz-executor.6
76520 346035 62457 32767 2 0x4000010 syz-executor.6
49458 261784 21091 32767 3 0x90 nanoslp syz-executor.7
49458 511078 21091 32767 3 0x4000090 fsleep syz-executor.7
49458 175773 21091 32767 3 0x4000090 netcon2 syz-executor.7
49458 63839 21091 32767 3 0x4000090 fsleep syz-executor.7
45711 295807 49422 32767 2 0x10 syz-executor.3
*45711 474102 49422 32767 7 0x4000010 syz-executor.3
62457 521994 70936 32767 3 0x90 nanoslp syz-executor.6
70936 165898 99342 0 3 0x82 wait syz-executor.6
79697 52428 7322 32767 3 0x90 nanoslp syz-executor.5
7322 377089 99342 0 3 0x82 wait syz-executor.5
21091 17141 94880 32767 3 0x90 nanoslp syz-executor.7
94880 84727 99342 0 3 0x82 wait syz-executor.7
50451 368012 40361 32767 3 0x90 nanoslp syz-executor.4
40361 10631 99342 0 3 0x82 wait syz-executor.4
49422 513348 18728 32767 3 0x90 nanoslp syz-executor.3
18728 447042 99342 0 3 0x82 wait syz-executor.3
61892 316180 0 0 3 0x14200 bored sosplice
56789 365331 63928 32767 3 0x90 nanoslp syz-executor.2
63928 462782 99342 0 3 0x82 wait syz-executor.2
32241 359902 36829 32767 3 0x90 nanoslp syz-executor.1
36829 431400 99342 0 3 0x82 wait syz-executor.1
45543 442461 29889 32767 2 0x10 syz-executor.0
29889 163188 99342 0 3 0x82 wait syz-executor.0
99342 42092 87892 0 3 0x82 wait syz-fuzzer
99342 496583 87892 0 3 0x4000082 nanoslp syz-fuzzer
99342 58279 87892 0 3 0x4000082 nanoslp syz-fuzzer
99342 435221 87892 0 3 0x4000082 wait syz-fuzzer
99342 83847 87892 0 3 0x4000082 wait syz-fuzzer
99342 58212 87892 0 3 0x4000082 thrsleep syz-fuzzer
99342 64373 87892 0 3 0x4000082 thrsleep syz-fuzzer
99342 13775 87892 0 3 0x4000082 thrsleep syz-fuzzer
99342 267040 87892 0 3 0x4000082 wait syz-fuzzer
99342 172317 87892 0 3 0x4000082 wait syz-fuzzer
99342 319654 87892 0 3 0x4000082 thrsleep syz-fuzzer
99342 325439 87892 0 3 0x4000082 kqread syz-fuzzer
99342 461861 87892 0 3 0x4000082 wait syz-fuzzer
99342 90955 87892 0 3 0x4000082 thrsleep syz-fuzzer
99342 376874 87892 0 3 0x4000082 wait syz-fuzzer
99342 15496 87892 0 3 0x4000082 wait syz-fuzzer
87892 14325 28121 0 3 0x10008a sigsusp ksh
28121 339811 27827 0 2 0x9a sshd
88968 409114 1 0 3 0x100083 ttyin getty
27827 324482 1 0 3 0x88 kqread sshd
17756 301760 67417 73 3 0x1100090 kqread syslogd
67417 304150 1 0 3 0x100082 netio syslogd
55622 312242 1 0 3 0x100080 kqread resolvd
57205 60427 57371 77 3 0x100092 kqread dhcpleased
57478 250148 57371 77 3 0x100092 kqread dhcpleased
57371 318243 1 0 3 0x80 kqread dhcpleased
19579 73239 0 0 3 0x14200 bored smr
41754 403976 0 0 2 0x14200 zerothread
72078 215852 0 0 3 0x14200 aiodoned aiodoned
84249 210775 0 0 3 0x14200 syncer update
97571 492021 0 0 3 0x14200 cleaner cleaner
18521 83845 0 0 7 0x14200 reaper
73393 155153 0 0 3 0x14200 pgdaemon pagedaemon
85440 440497 0 0 3 0x14200 bored viomb
48655 280389 0 0 3 0x40014200 acpi0 acpi0
35051 308871 0 0 3 0x40014200 idle1
78251 147532 0 0 3 0x14200 bored softnet
59658 187123 0 0 3 0x14200 bored softnet
26230 305707 0 0 3 0x14200 bored softnet
28604 136058 0 0 3 0x14200 bored softnet
85797 370587 0 0 3 0x14200 bored systqmp
16731 192594 0 0 3 0x14200 bored systq
77210 56356 0 0 3 0x40014200 bored softclock
72103 318867 0 0 3 0x40014200 idle0
1 484038 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 1:
exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8007e611b8)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 pmap_page_remove+0x44 sys/arch/amd64/amd64/pmap.c:1911
#4 uvm_anfree_list+0x98
#5 amap_wipeout+0x1b1 sys/uvm/uvm_amap.c:504
#6 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351
#7 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541
#8 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#9 reaper+0x19a sys/kern/kern_exit.c:448
#10 proc_trampoline+0x1c
Process 45711 (syz-executor.3) thread 0xffff800029665260 (474102)
exclusive rwlock netlock r = 0 (0xffffffff8292fbb0)
#0 witness_lock+0x44d
#1 sosend+0x500 sys/kern/uipc_socket.c:632
#2 sendit+0x65d sys/kern/uipc_syscalls.c:694
#3 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
#4 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#4 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
#5 Xsyscall+0x128
Process 45543 (syz-executor.0) thread 0xffff8000ffff4540 (442461)
exclusive rrwlock inode r = 0 (0xfffffd807a37f4d8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353
#6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112
#10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806aea5b48)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412
#6 namei+0x36a sys/kern/vfs_lookup.c:244
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097
#8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
Process 18521 (reaper) thread 0xffff800021233a48 (83845)
exclusive kernel: protection fault trap, code=0
Faulted in DDB; continuing...
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10212 6412K 6419K 78643K 11367 0
pcb 13 16K 18K 78643K 19 0
rtable 240 6K 7K 78643K 1986 0
ifaddr 82 17K 17K 78643K 235 0
sysctl 3 1K 3K 78643K 13 0
counters 56 35K 35K 78643K 98 0
ioctlops 0 0K 2K 78643K 173 0
iov 0 0K 28K 78643K 2982 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1271 79K 79K 78643K 5093 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 248 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 4024 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 22 81K 113K 78643K 16672 0
sigio 0 0K 0K 78643K 288 0
proc 59 91K 115K 78643K 2408 0
subproc 104 6K 6K 78643K 377 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 1377 0
in_multi 99 6K 7K 78643K 573 0
ether_multi 1 0K 0K 78643K 99 0
mrt 2 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 253 1129K 1129K 78643K 253 0
exec 0 0K 2K 78643K 3575 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 62K 78643K 8 0
UVM amap 350 91K 105K 78643K 102323 0
UVM aobj 131 8K 8K 78643K 133 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 589 0
NDP 11 0K 2K 78643K 90 0
temp 124 4726K 4854K 78643K 44128 0
kqueue 12 18K 26K 78643K 1664 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> 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 1669 0 1666 25 24 1 5 0 8 0
rtentry 112 360 0 247 4 0 4 4 0 8 0
unpcb 144 15434 0 15421 154 152 2 10 0 8 1
syncache 296 161 0 161 33 33 0 1 0 8 0
tcpqe 32 625 0 625 17 17 0 1 0 8 0
tcpcb 768 13417 0 13398 330 316 14 23 0 8 8
arp 120 66 0 47 1 0 1 1 0 8 0
ipq 40 31 0 31 10 10 0 1 0 8 0
ipqe 40 168 0 168 10 10 0 1 0 8 0
inpcb 368 20452 0 20436 289 277 12 21 0 8 8
nd6 48 99 0 73 1 0 1 1 0 8 0
kcovpl 48 29 0 21 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1449 0 986 32 3 29 30 0 8 0
art_table 32 1450 0 986 4 0 4 4 0 8 0
art_node 16 359 0 256 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 7 2 2 0 1 0 8 0
semapl 112 4020 0 4010 1 0 1 1 0 8 0
shmpl 112 130 0 2 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 26350 0 24875 93 0 93 93 0 8 0
ffsino 272 26350 0 24875 99 0 99 99 0 8 0
nchpl 144 50740 0 49097 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 182344 0 182343 7 6 1 2 0 8 0
percpumem 16 61 0 21 1 0 1 1 0 8 0
kstatmem 264 64 0 42 2 0 2 2 0 8 0
scxspl 216 154999 0 154999 46 44 2 8 0 8 2
plimitpl 152 3646 0 3624 15 14 1 2 0 8 0
sigapl 424 16919 0 16865 7 0 7 7 0 8 0
futexpl 64 156185 0 156182 11 10 1 1 0 8 0
knotepl 120 1354 0 0 18 0 18 18 0 8 0
kqueuepl 216 5144 0 5136 80 75 5 5 0 8 4
pipepl 320 4880 0 4852 135 131 4 11 0 8 0
fdescpl 496 16901 0 16868 7 2 5 6 0 8 0
filepl 152 136190 0 135954 223 206 17 24 0 8 5
lockfpl 104 2780 0 2778 3 2 1 2 0 8 0
lockfspl 48 711 0 709 1 0 1 1 0 8 0
sessionpl 144 44 0 28 1 0 1 1 0 8 0
pgrppl 48 341 0 325 1 0 1 1 0 8 0
ucredpl 104 22795 0 22777 1 0 1 1 0 8 0
zombiepl 144 16868 0 16865 1 0 1 1 0 8 0
processpl 1064 16919 0 16865 4 0 4 4 0 8 0
procpl 672 49995 0 49918 43 36 7 9 0 8 0
sosppl 168 233 0 233 26 25 1 1 0 8 1
sockpl 488 37819 0 37787 847 833 14 38 0 8 8
mcl64k 65536 34 0 0 3 0 3 3 0 8 0
mcl16k 16384 41 0 0 4 1 3 3 0 8 0
mcl12k 12288 25 0 0 2 0 2 2 0 8 0
mcl9k 9216 24 0 0 2 0 2 2 0 8 0
mcl8k 8192 49 0 0 3 0 3 3 0 8 0
mcl4k 4096 62 0 0 5 0 5 5 0 8 0
mcl2k2 2112 13 0 0 1 0 1 1 0 8 0
mcl2k 2048 437 0 0 33 10 23 33 0 8 0
mtagpl 96 4 0 0 1 0 1 1 0 8 0
mbufpl 256 8896 0 0 546 0 546 546 0 8 0
bufpl 288 30725 0 24395 453 0 453 453 0 8 0
anonpl 24 3467879 0 3455811 289 181 108 129 0 186 2
amapchunkpl 152 309346 0 308707 124 94 30 41 0 158 0
amappl16 200 52018 0 51632 172 143 29 39 0 8 3
amappl15 192 6223 0 6212 1 0 1 1 0 8 0
amappl14 184 3979 0 3965 1 0 1 1 0 8 0
amappl13 176 1863 0 1860 1 0 1 1 0 8 0
amappl12 168 1844 0 1840 1 0 1 1 0 8 0
amappl11 160 1213 0 1199 1 0 1 1 0 8 0
amappl10 152 1640 0 1637 1 0 1 1 0 8 0
amappl9 144 2724 0 2717 1 0 1 1 0 8 0
amappl8 136 2754 0 2596 8 2 6 6 0 8 0
amappl7 128 1657 0 1633 1 0 1 1 0 8 0
amappl6 120 2626 0 2600 2 1 1 2 0 8 0
amappl5 112 12221 0 12204 1 0 1 1 0 8 0
amappl4 104 12992 0 12953 2 0 2 2 0 8 0
amappl3 96 53719 0 53657 2 0 2 2 0 8 0
amappl2 88 4877 0 4836 2 0 2 2 0 8 0
amappl1 80 425166 0 424431 21 4 17 20 0 8 0
amappl 88 100630 0 100444 6 1 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 72 132 0 2 3 0 3 3 0 8 0
uaddrrnd 24 16902 0 16868 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 16902 0 16868 1 0 1 1 0 8 0
vmmpekpl 168 146274 0 146212 4 0 4 4 0 8 0
vmmpepl 168 1691889 0 1689095 342 198 144 154 0 357 11
vmsppl 368 16901 0 16868 4 0 4 4 0 8 0
rwobjpl 56 429461 0 421904 130 20 110 113 0 8 1
pdppl 4096 33811 0 33736 464 383 81 89 0 8 6
pvpl 32 6800540 0 6783121 696 500 196 255 0 265 21
pmappl 248 16901 0 16868 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2042 0 682 40 0 40 40 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cfc060) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd805c575420,fffffd80790e6200,fffffd807c6ec100,fffffd8077044500) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd805c575420,fffffd807c6ec100,ffff80002e4c4e60,0,fffffd8077044500,402) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029665260,4,ffff80002e4c4fe0,402,ffff80002e4c50d0) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029665260,ffff80002e4c5088,ffff80002e4c50d0) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c5150) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c5150) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa7f91165b90, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:651
comcnputc(800,72) at comcnputc+0x1a7 sys/dev/ic/com.c:1269
cnputc(72) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(72) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261ba78) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a1bd6) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619795,ffffffff826448c7,9b6,ffffffff825d77c8) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd806b9e8a20) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd806b9e8a20) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: 1
ddb{1}> trace
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:651
comcnputc(800,72) at comcnputc+0x1a7 sys/dev/ic/com.c:1269
cnputc(72) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(72) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261ba78) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a1bd6) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619795,ffffffff826448c7,9b6,ffffffff825d77c8) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd806b9e8a20) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd806b9e8a20) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -14