panic: tpcanpi_co:ut kpeurt
nelStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*283475 17650 32767 0x10 0x4000000 1 syz-executor.6
222726 50397 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3b407dd7b50, 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
cpu0: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486
*cpu1: tcp_output
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3b407dd7b50, count: -9
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e4cb2f0
rbx 0xffff800020dd9b8f
rdx 0xffff800000bfb800
rcx 0
rax 0xffff80002b056540
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbe0adc3c9bc8e3ec
r11 0xa4565bf8dcb4df09
r12 0xffff800020dd9990
r13 0
r14 0
r15 0x1
rip 0xffffffff81a16d08 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e4cb2e0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.6) pid=283475 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=76, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff2008,0xffff800027bfb7c0
process=0xffff800027bed0b8 user=0xffff80002e4c6000, vmspace=0xfffffd80676e5468
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
72920 434899 36302 32767 2 0x10 syz-executor.5
50784 510070 21808 32767 2 0x10 syz-executor.4
50784 311537 21808 32767 3 0x4000090 fsleep syz-executor.4
17650 121531 91892 32767 2 0x10 syz-executor.6
*17650 283475 91892 32767 7 0x4000010 syz-executor.6
98427 383158 76648 32767 2 0x10 syz-executor.3
98427 161558 76648 32767 3 0x4000090 fsleep syz-executor.3
80250 395375 0 0 3 0x14200 bored sosplice
91892 260367 48019 32767 3 0x90 nanoslp syz-executor.6
48019 368775 70700 0 3 0x82 wait syz-executor.6
72746 189249 69848 32767 3 0x90 nanoslp syz-executor.7
69848 357459 70700 0 3 0x82 wait syz-executor.7
36302 194343 14669 32767 3 0x90 nanoslp syz-executor.5
21808 161551 79340 32767 3 0x90 nanoslp syz-executor.4
14669 227882 70700 0 3 0x82 wait syz-executor.5
79340 396466 70700 0 3 0x82 wait syz-executor.4
76648 38131 59473 32767 3 0x90 nanoslp syz-executor.3
59473 337373 70700 0 3 0x82 wait syz-executor.3
90708 163247 81745 32767 3 0x10 biowait syz-executor.2
93174 217437 6686 32767 3 0x90 nanoslp syz-executor.1
81745 469458 70700 0 3 0x82 wait syz-executor.2
6686 277406 70700 0 3 0x82 wait syz-executor.1
49795 10946 46406 32767 3 0x90 nanoslp syz-executor.0
46406 313942 70700 0 3 0x82 wait syz-executor.0
70700 290688 11921 0 3 0x82 kqread syz-fuzzer
70700 522285 11921 0 3 0x4000082 nanoslp syz-fuzzer
70700 466102 11921 0 3 0x4000082 wait syz-fuzzer
70700 491965 11921 0 3 0x4000082 wait syz-fuzzer
70700 205424 11921 0 3 0x4000082 thrsleep syz-fuzzer
70700 351060 11921 0 3 0x4000082 thrsleep syz-fuzzer
70700 382922 11921 0 3 0x4000082 wait syz-fuzzer
70700 393418 11921 0 3 0x4000082 wait syz-fuzzer
70700 176758 11921 0 3 0x4000082 thrsleep syz-fuzzer
70700 399140 11921 0 3 0x4000082 wait syz-fuzzer
70700 7375 11921 0 3 0x4000082 wait syz-fuzzer
70700 54646 11921 0 3 0x4000082 wait syz-fuzzer
70700 385733 11921 0 3 0x4000082 thrsleep syz-fuzzer
70700 257508 11921 0 3 0x4000082 wait syz-fuzzer
70700 123696 11921 0 3 0x4000082 nanoslp syz-fuzzer
70700 197760 11921 0 3 0x4000082 thrsleep syz-fuzzer
11921 279670 22182 0 3 0x10008a sigsusp ksh
22182 273110 48396 0 3 0x9a kqread sshd
20251 108459 1 0 3 0x100083 ttyin getty
48396 504152 1 0 3 0x88 kqread sshd
49891 16729 29530 73 3 0x1100090 kqread syslogd
29530 415158 1 0 3 0x100082 netio syslogd
7550 182560 1 0 3 0x100080 kqread resolvd
69370 55165 84046 77 3 0x100092 kqread dhcpleased
97754 403720 84046 77 3 0x100092 kqread dhcpleased
84046 375908 1 0 3 0x80 kqread dhcpleased
77591 174911 0 0 3 0x14200 bored smr
51336 207994 0 0 2 0x14200 zerothread
48522 88095 0 0 3 0x14200 aiodoned aiodoned
97045 90914 0 0 3 0x14200 syncer update
15699 141874 0 0 3 0x14200 cleaner cleaner
50397 222726 0 0 7 0x14200 reaper
80894 312090 0 0 3 0x14200 pgdaemon pagedaemon
5910 428576 0 0 3 0x14200 bored viomb
38891 492898 0 0 3 0x40014200 acpi0 acpi0
49827 231308 0 0 3 0x40014200 idle1
8317 355964 0 0 3 0x14200 bored softnet
37172 75370 0 0 3 0x14200 bored softnet
9855 120141 0 0 3 0x14200 bored softnet
17835 147325 0 0 3 0x14200 bored softnet
44093 394903 0 0 3 0x14200 bored systqmp
36551 296443 0 0 3 0x14200 bored systq
76629 327894 0 0 2 0x40014200 softclock
28458 276916 0 0 3 0x40014200 idle0
1 277656 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82add780)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333
#4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523
#5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351
#6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541
#7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#8 reaper+0x19a sys/kern/kern_exit.c:448
#9 proc_trampoline+0x1c
Process 17650 (syz-executor.6) thread 0xffff80002b056540 (283475)
exclusive rwlock netlock r = 0 (0xffffffff8291ebe0)
#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 90708 (syz-executor.2) thread 0xffff8000ffff4fc0 (163247)
exclusive rrwlock inode r = 0 (0xfffffd80689ae2c8)
#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 (0xfffffd8067f595e8)
#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 50397 (reaper) thread 0xffff800021233508 (222726)
exclusive kernel: protection fault trap, code=0
Faulted in DDB; continuing...
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10199 6410K 6419K 78643K 11290 0
pcb 13 12K 14K 78643K 17 0
rtable 236 6K 7K 78643K 536 0
ifaddr 82 16K 16K 78643K 84 0
sysctl 2 0K 0K 78643K 2 0
counters 56 35K 35K 78643K 56 0
ioctlops 0 0K 2K 78643K 45 0
iov 0 0K 32K 78643K 133 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1270 79K 79K 78643K 1492 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 28 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 801 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 22 81K 109K 78643K 1800 0
sigio 0 0K 0K 78643K 2 0
proc 56 78K 115K 78643K 551 0
subproc 104 6K 6K 78643K 104 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 323 0
in_multi 99 6K 6K 78643K 105 0
ether_multi 1 0K 0K 78643K 4 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 175 784K 784K 78643K 175 0
exec 0 0K 2K 78643K 695 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 274 84K 101K 78643K 12574 0
UVM aobj 118 7K 7K 78643K 120 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 53 0
NDP 11 0K 2K 78643K 27 0
temp 124 4726K 4854K 78643K 7449 0
kqueue 12 18K 28K 78643K 303 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 120 266 0 263 4 3 1 2 0 8 0
rtentry 112 114 0 3 4 0 4 4 0 8 0
unpcb 144 2787 0 2771 33 27 6 10 0 8 5
syncache 296 19 0 19 5 5 0 1 0 8 0
tcpqe 32 18 0 18 4 4 0 1 0 8 0
tcpcb 768 2373 0 2344 65 56 9 22 0 8 5
arp 120 18 0 0 1 0 1 1 0 8 0
ipq 40 2 0 2 1 1 0 1 0 8 0
ipqe 40 6 0 6 1 1 0 1 0 8 0
inpcb 368 3327 0 3305 35 27 8 14 0 8 5
nd6 48 27 0 2 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 464 0 4 29 0 29 29 0 8 0
art_table 32 465 0 4 4 0 4 4 0 8 0
art_node 16 113 0 12 1 0 1 1 0 8 0
sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 799 0 789 1 0 1 1 0 8 0
shmpl 112 117 0 2 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3686 0 2253 90 0 90 90 0 8 0
ffsino 272 3686 0 2253 96 0 96 96 0 8 0
nchpl 144 6193 0 4521 63 0 63 63 0 8 0
uvmvnodes 80 3799 0 0 78 0 78 78 0 8 0
vnodes 216 3799 0 0 212 0 212 212 0 8 0
namei 1024 20628 0 20627 2 1 1 2 0 8 0
percpumem 16 40 0 0 1 0 1 1 0 8 0
kstatmem 264 22 0 0 2 0 2 2 0 8 0
scxspl 216 18900 0 18899 16 13 3 8 0 8 2
plimitpl 152 365 0 343 3 1 2 2 0 8 1
sigapl 424 2085 0 2031 7 0 7 7 0 8 0
futexpl 64 16562 0 16560 1 0 1 1 0 8 0
knotepl 120 559 0 0 17 0 17 17 0 8 0
kqueuepl 216 617 0 609 9 6 3 5 0 8 2
pipepl 320 422 0 394 11 8 3 6 0 8 0
fdescpl 496 2067 0 2034 7 2 5 6 0 8 0
filepl 152 15885 0 15633 45 30 15 22 0 8 5
lockfpl 104 295 0 293 1 0 1 1 0 8 0
lockfspl 48 70 0 68 1 0 1 1 0 8 0
sessionpl 144 23 0 7 1 0 1 1 0 8 0
pgrppl 48 171 0 155 1 0 1 1 0 8 0
ucredpl 104 1936 0 1918 1 0 1 1 0 8 0
zombiepl 144 2034 0 2031 1 0 1 1 0 8 0
processpl 1064 2085 0 2031 4 0 4 4 0 8 0
procpl 672 5581 0 5504 12 4 8 9 0 8 1
sosppl 168 18 0 16 2 1 1 1 0 8 0
sockpl 488 6440 0 6399 161 148 13 43 0 8 7
mcl64k 65536 13 0 0 2 0 2 2 0 8 0
mcl16k 16384 7 0 0 1 0 1 1 0 8 0
mcl12k 12288 16 0 0 2 0 2 2 0 8 0
mcl9k 9216 6 0 0 1 0 1 1 0 8 0
mcl8k 8192 15 0 0 2 0 2 2 0 8 0
mcl4k 4096 10 0 0 2 0 2 2 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 353 0 0 44 1 43 44 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 689 0 0 40 0 40 40 0 8 0
bufpl 288 6660 0 330 453 0 453 453 0 8 0
anonpl 24 433962 0 421659 159 49 110 123 0 186 20
amapchunkpl 152 36029 0 35373 44 6 38 41 0 158 7
amappl16 200 7384 0 7016 62 39 23 38 0 8 0
amappl15 192 524 0 516 1 0 1 1 0 8 0
amappl14 184 461 0 452 1 0 1 1 0 8 0
amappl13 176 82 0 81 1 0 1 1 0 8 0
amappl12 168 13 0 10 1 0 1 1 0 8 0
amappl11 160 81 0 67 1 0 1 1 0 8 0
amappl10 152 633 0 628 1 0 1 1 0 8 0
amappl9 144 713 0 707 1 0 1 1 0 8 0
amappl8 136 832 0 758 3 0 3 3 0 8 0
amappl7 128 329 0 308 1 0 1 1 0 8 0
amappl6 120 417 0 403 2 1 1 2 0 8 0
amappl5 112 2183 0 2153 1 0 1 1 0 8 0
amappl4 104 1035 0 1008 2 1 1 2 0 8 0
amappl3 96 5840 0 5783 2 0 2 2 0 8 0
amappl2 88 522 0 490 2 1 1 2 0 8 0
amappl1 80 53871 0 53161 19 2 17 19 0 8 0
amappl 88 12032 0 11855 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 72 119 0 2 3 0 3 3 0 8 0
uaddrrnd 24 2067 0 2033 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2067 0 2033 1 0 1 1 0 8 0
vmmpekpl 168 20178 0 20119 3 0 3 3 0 8 0
vmmpepl 168 206079 0 203456 160 31 129 142 0 357 2
vmsppl 368 2066 0 2033 4 0 4 4 0 8 0
rwobjpl 56 58284 0 53014 78 2 76 76 0 8 0
pdppl 4096 4141 0 4066 133 52 81 87 0 8 6
pvpl 32 877948 0 860668 281 83 198 248 0 265 42
pmappl 248 2066 0 2033 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 940 0 83 25 0 25 25 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff829a0ff0) 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_write_1(3f8,0,6c) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6c) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6c) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6c) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6c) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd80676e5b98) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd80676e5b98) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021233508) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: 1
ddb{0}> trace
x86_ipi_db(ffffffff829a0ff0) 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_write_1(3f8,0,6c) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6c) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6c) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6c) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6c) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd80676e5b98) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd80676e5b98) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021233508) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -14
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3b407dd7b50, count: 6
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000bb9200) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd807c6063d0,fffffd80784dda00,0,fffffd8078466b00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd807c6063d0,0,ffff80002e4cb690,0,fffffd8078466b00,4) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff80002b056540,13,ffff80002e4cb810,4,ffff80002e4cb900) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff80002b056540,ffff80002e4cb8b8,ffff80002e4cb900) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4cb980) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4cb980) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3b407dd7b50, count: -9