panic: Data modified on freelist: word 4 of object 0xffff8000014f3200 siWAzeR N0IxNG:1 88 SpPL NrOeTvi ousL OtWyEpReE Df rOeN SeYS C(A0Lx6L5 7623 ! 7= E0XxITde a0f 43
1Stopped at savectx+0xae: movl $0,%gs:0x680
TID PID UID PRFLAGS PFLAGS CPU COMMAND
193118 39910 0 0 0x4000000 0 syz-executor
*457819 74620 0 0 0x4000000 1 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0xb1e9e320ce0, count: 14
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: Data modified on freelist: word 4 of object 0xffff8000014f3200 size 0x188 previous type free (0x6563 != 0xdeaf4152)
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0xb1e9e320ce0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003a8d6f60
rbx 0
rdx 0xffff80000144dc40
rcx 0xffff80002a452038
rax 0x32
r8 0xffff80003a8d6e90
r9 0x1
r10 0x6833a0b3a7d7b397
r11 0x9e444afb6fa76d93
r12 0
r13 0
r14 0xffff80002a452038
r15 0
rip 0xffffffff81a1a3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80003a8d6ee0
ss 0x10
savectx+0xae: movl $0,%gs:0x680
ddb{1}> show proc
PROC (syz-executor) tid=457819 pid=74620 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=50, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a390a58,0xffff80002a453758
process=0xffff8000ffff72a8 user=0xffff80003a8d1000, vmspace=0xfffffd806beab3a8
estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=4, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
20051 285338 37376 0 3 0x3000 suspend syz-executor
20051 200902 37376 0 2 0x4081000 syz-executor
20051 64901 37376 0 3 0x4081000 inode syz-executor
79036 198249 50986 0 2 0 syz-executor
79036 481013 50986 0 2 0x4000000 syz-executor
39910 490267 42576 0 2 0 syz-executor
39910 193118 42576 0 7 0x4000000 syz-executor
74620 191688 20034 0 2 0 syz-executor
*74620 457819 20034 0 7 0x4000000 syz-executor
66052 366204 97369 0 2 0 syz-executor
66052 379417 97369 0 3 0x4000080 fifor syz-executor
66052 280882 97369 0 3 0x4000080 fsleep syz-executor
66052 99184 97369 0 3 0x4000080 fsleep syz-executor
70763 23517 62960 0 2 0x1 syz-executor
70763 54561 62960 0 2 0x4000001 syz-executor
70763 416580 62960 0 3 0x4000080 fsleep syz-executor
59286 457642 0 0 3 0x14200 acct acct
50986 10897 50587 0 3 0x82 nanoslp syz-executor
20034 332902 50587 0 3 0x82 nanoslp syz-executor
42576 231467 50587 0 3 0x82 nanoslp syz-executor
62960 10375 50587 0 3 0x82 nanoslp syz-executor
48636 464481 50587 0 3 0x2 biowait syz-executor
10611 519356 1 0 3 0x100083 ttyin getty
45220 68639 0 0 3 0x14280 nfsidl nfsio
17035 207055 0 0 3 0x14280 nfsidl nfsio
67652 228993 0 0 3 0x14280 nfsidl nfsio
83940 370117 0 0 3 0x14280 nfsidl nfsio
38522 175815 0 0 3 0x14280 nfsidl nfsio
25170 99947 0 0 3 0x14280 nfsidl nfsio
80507 430847 0 0 3 0x14280 nfsidl nfsio
48986 128090 0 0 3 0x14280 nfsidl nfsio
80564 396743 0 0 3 0x14280 nfsidl nfsio
82201 480913 0 0 3 0x14280 nfsidl nfsio
57059 321282 0 0 3 0x14280 nfsidl nfsio
87991 44782 0 0 3 0x14280 nfsidl nfsio
84224 389250 0 0 3 0x14280 nfsidl nfsio
41680 86654 0 0 3 0x14280 nfsidl nfsio
7576 456120 0 0 3 0x14280 nfsidl nfsio
97791 489422 0 0 3 0x14280 nfsidl nfsio
47357 504609 0 0 3 0x14280 nfsidl nfsio
37212 169945 0 0 3 0x14280 nfsidl nfsio
90129 480291 0 0 3 0x14280 nfsidl nfsio
90948 282341 0 0 3 0x14280 nfsidl nfsio
66047 7050 0 0 3 0x14200 bored sosplice
97369 193609 50587 0 3 0x82 nanoslp syz-executor
37376 517369 50587 0 3 0x82 nanoslp syz-executor
50587 59570 72457 0 3 0x82 wait syz-executor
72457 182984 66598 0 3 0x10008a sigsusp ksh
66598 287115 35029 0 3 0x98 kqread sshd-session
35029 197274 97217 0 3 0x92 kqread sshd-session
97217 101645 1 0 3 0x88 kqread sshd
97263 314406 13018 74 3 0x1100092 bpf pflogd
13018 249330 1 0 3 0x80 sbwait pflogd
90157 388962 87898 73 3 0x1100090 kqread syslogd
87898 104329 1 0 3 0x100082 sbwait syslogd
13445 421353 1 0 3 0x100080 kqread resolvd
26974 494674 86929 77 3 0x100092 kqread dhcpleased
97472 251686 86929 77 3 0x100092 kqread dhcpleased
86929 298420 1 0 3 0x80 kqread dhcpleased
13821 40495 0 0 3 0x14200 bored smr
20632 2241 0 0 2 0x14200 zerothread
46011 208574 0 0 3 0x14200 aiodoned aiodoned
38036 514182 0 0 3 0x14200 syncer update
96323 508816 0 0 3 0x14200 cleaner cleaner
38146 126685 0 0 3 0x14200 reaper reaper
80205 482516 0 0 3 0x14200 pgdaemon pagedaemon
92445 357516 0 0 3 0x14200 bored viomb
13706 202631 0 0 3 0x40014200 acpi0 acpi0
58386 132388 0 0 3 0x40014200 idle1
80947 80836 0 0 3 0x14200 bored softnet3
31044 488862 0 0 3 0x14200 bored softnet2
92804 431771 0 0 3 0x14200 bored softnet1
96934 418813 0 0 3 0x14200 bored softnet0
41631 296218 0 0 3 0x14200 bored systqmp
51403 272426 0 0 3 0x14200 bored systq
66167 376581 0 0 3 0x14200 tmoslp softclockmp
67769 186604 0 0 3 0x40014200 tmoslp softclock
83776 13283 0 0 3 0x40014200 idle0
1 171356 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff8383f188)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 malloc+0x2f9 sys/kern/kern_malloc.c:199
#4 bpfopen+0x11b
#5 spec_open_clone+0x287 sys/kern/spec_vnops.c:722
#6 spec_open+0x329 sys/kern/spec_vnops.c:148
#7 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
#8 vn_open+0x708 sys/kern/vfs_vnops.c:177
#9 doopenat+0x32e sys/kern/vfs_syscalls.c:1139
#10 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#11 Xsyscall+0x128
Process 20051 (syz-executor) thread 0xffff80002a452a78 (200902)
exclusive rrwlock inode r = 0 (0xfffffd806dec69a0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vn_write+0x190 sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x23c sys/kern/sys_generic.c:380
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
Process 20051 (syz-executor) thread 0xffff80002a391c48 (64901)
exclusive rrwlock inode r = 0 (0xfffffd806dd030c8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#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 vn_open+0x1f4 sys/kern/vfs_vnops.c:107
#8 doopenat+0x32e sys/kern/vfs_syscalls.c:1139
#9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#10 Xsyscall+0x128
Process 79036 (syz-executor) thread 0xffff80003c4f22b8 (481013)
exclusive rwlock vmmaplk r = 0 (0xfffffd806beabbc8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250
#3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1860
#4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline]
#4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774
#5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668
#6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
#7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
#8 recall_trap+0x8
Process 39910 (syz-executor) thread 0xffff80003c4f34a8 (193118)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8399f380)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 __mp_acquire_count+0x58
#2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441
#3 yield+0x6a sys/kern/sched_bsd.c:320
#4 malloc+0xe5 sys/kern/kern_malloc.c:174
#5 checkalias+0x21c sys/kern/vfs_subr.c:602
#6 cdevvp+0xd2 sys/kern/vfs_subr.c:525
#7 spec_open_clone+0x1ee sys/kern/spec_vnops.c:713
#8 spec_open+0x329 sys/kern/spec_vnops.c:148
#9 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
#10 vn_open+0x708 sys/kern/vfs_vnops.c:177
#11 doopenat+0x32e sys/kern/vfs_syscalls.c:1139
#12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#13 Xsyscall+0x128
Process 48636 (syz-executor) thread 0xffff80002a453c68 (464481)
exclusive rrwlock inode r = 0 (0xfffffd806dd43de0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#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:3117
#10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ea54ed8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#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:3102
#8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10216 11123K 12419K 166960K 15807 0
pcb 17 17K 19K 166960K 520 0
rtable 212 12K 12K 166960K 1049 0
pf 39 18K 22K 166960K 274 0
ifaddr 40 7K 8K 166960K 194 0
ifgroup 59 2K 2K 166960K 309 0
sysctl 4 1K 2K 166960K 7 0
counters 66 36K 37K 166960K 360 0
ioctlops 0 0K 4K 166960K 1868 0
iov 0 0K 24K 166960K 269 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1515 95K 96K 166960K 3800 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 53 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 102 0
dirhash 12 2K 2K 166960K 78 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 93K 166960K 2871 0
sigio 0 0K 0K 166960K 49 0
proc 72 91K 128K 166960K 1259 0
subproc 72 4K 4K 166960K 208 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 622 0
in_multi 84 6K 7K 166960K 336 0
ether_multi 1 0K 0K 166960K 12 0
mrt 1 0K 0K 166960K 8 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 121 546K 546K 166960K 121 0
exec 0 0K 1K 166960K 994 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 5 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 229 73K 88K 166960K 27974 0
UVM aobj 83 5K 5K 166960K 86 0
pinsyscall 41 82K 104K 166960K 4358 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 228 0
NDP 15 0K 2K 166960K 139 0
temp 80 8692K 8946K 166960K 107449 0
kqueue 16 23K 34K 166960K 501 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 317 0 313 3 2 1 3 0 8 0
rtentry 160 329 0 245 5 0 5 5 0 8 0
unpcb 144 2071 0 2050 15 11 4 6 0 8 3
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpcb 808 869 0 863 28 24 4 8 0 8 3
arp 120 55 0 39 1 0 1 1 0 8 0
inpcb 376 3191 0 3180 38 31 7 15 0 8 5
nd6 136 74 0 52 1 0 1 1 0 8 0
pkpcb 40 27 0 27 5 4 1 1 0 8 1
kcovpl 48 23 0 15 1 0 1 1 0 8 0
mppekey 1024 35 0 35 2 2 0 1 0 8 0
ppxss 1168 111 0 111 3 2 1 1 0 8 1
pppxif 1480 7 0 7 5 5 0 1 0 8 0
pffrag 232 13 0 8 1 0 1 1 0 482 0
pffrnode 88 13 0 8 1 0 1 1 0 8 0
pffrent 40 20 0 14 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 4 0 4 1 1 0 1 0 8 0
pfanchor 1288 2 0 1 1 0 1 1 0 8 0
pfstitem 24 165 0 99 1 0 1 1 0 8 0
pfstkey 128 170 0 104 3 0 3 3 0 8 0
pfstate 376 167 0 102 9 0 9 9 0 8 0
pfrule 1344 23 0 18 2 1 1 2 0 8 0
art_heap8 4096 4 0 0 4 0 4 4 0 8 0
art_heap4 256 1364 0 998 30 3 27 29 0 8 1
art_table 32 1368 0 998 4 0 4 4 0 8 0
art_node 16 318 0 244 1 0 1 1 0 8 0
sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0
semupl 112 4 0 4 4 4 0 1 0 8 0
semapl 112 99 0 89 1 0 1 1 0 8 0
shmpl 112 83 0 3 3 0 3 3 0 8 0
dirhash 1024 61 0 44 3 0 3 3 0 8 0
dino2pl 256 6452 0 4919 96 0 96 96 0 8 0
ffsino 280 6452 0 4919 110 0 110 110 0 8 0
nchpl 144 10332 0 8609 64 0 64 64 0 8 0
rtmask 32 15 0 15 5 5 0 1 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 37598 0 37596 4 3 1 2 0 8 0
percpumem 16 194 0 147 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0
kstatmem 264 186 0 160 3 1 2 3 0 8 0
scsiplug 72 7 0 7 4 4 0 1 0 8 0
scxspl 216 32624 0 32623 16 14 2 8 1 8 1
plimitpl 152 516 0 499 1 0 1 1 0 8 0
sigapl 424 3173 0 3103 9 0 9 9 0 8 0
futexpl 64 40858 0 40855 1 0 1 1 0 8 0
knotepl 120 1049 0 0 31 0 31 31 0 8 0
kqueuepl 216 966 0 954 10 9 1 3 0 8 0
pipepl 328 430 0 403 8 5 3 8 0 8 0
fdescpl 504 3125 0 3095 5 0 5 5 0 8 0
filepl 152 20639 0 20419 41 24 17 21 0 8 5
lockfpl 104 1174 0 1172 2 1 1 2 0 8 0
lockfspl 48 348 0 346 1 0 1 1 0 8 0
sessionpl 144 41 0 32 1 0 1 1 0 8 0
pgrppl 48 164 0 147 1 0 1 1 0 8 0
ucredpl 104 3323 0 3308 1 0 1 1 0 8 0
zombiepl 144 3852 0 3850 1 0 1 1 0 8 0
processpl 1176 3173 0 3103 6 0 6 6 0 8 0
procpl 656 7503 0 7423 8 0 8 8 0 8 0
srpgc 96 25 0 25 9 9 0 1 0 8 0
sosppl 168 20 0 20 5 5 0 1 0 8 0
sockpl 688 5648 0 5613 60 51 9 24 0 8 5
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 7 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 36 0 0 4 0 4 4 0 8 0
mtagpl 96 259 0 0 6 0 6 6 0 8 0
mbufpl 256 2357 0 0 146 0 146 146 0 8 0
bufpl 280 8107 0 1952 440 0 440 440 0 8 0
anonpl 24 322170 0 316386 64 15 49 49 0 184 6
amapchunkpl 152 93995 0 93429 48 18 30 32 0 158 4
amappl16 200 4518 0 4434 15 8 7 9 0 8 0
amappl15 192 40 0 40 1 1 0 1 0 8 0
amappl14 184 149 0 137 1 0 1 1 0 8 0
amappl13 176 27 0 27 1 1 0 1 0 8 0
amappl12 168 4011 0 3980 4 2 2 3 0 8 0
amappl11 160 48 0 34 1 0 1 1 0 8 0
amappl10 152 56 0 56 1 1 0 1 0 8 0
amappl9 144 253 0 253 1 1 0 1 0 8 0
amappl8 136 46 0 43 1 0 1 1 0 8 0
amappl7 128 140 0 127 1 0 1 1 0 8 0
amappl6 120 325 0 320 1 0 1 1 0 8 0
amappl5 112 179 0 169 1 0 1 1 0 8 0
amappl4 104 380 0 358 1 0 1 1 0 8 0
amappl3 96 18999 0 18888 4 0 4 4 0 8 0
amappl2 88 895 0 831 2 0 2 2 0 8 0
amappl1 80 17613 0 17037 15 1 14 14 0 8 0
amappl 88 27322 0 27150 5 0 5 5 0 92 0
dma65536 65536 2 0 2 2 2 0 1 0 8 0
dma32768 32768 1 0 1 1 1 0 1 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 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 128 254 0 254 2 2 0 1 0 8 0
dma64 64 7 0 7 2 2 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 85 0 3 2 0 2 2 0 8 0
uaddrrnd 24 3125 0 3095 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3125 0 3095 1 0 1 1 0 8 0
vmmpekpl 168 24098 0 24034 4 0 4 4 0 8 0
vmmpepl 168 189071 0 187172 96 7 89 91 0 357 1
vmsppl 456 3124 0 3095 5 0 5 5 0 8 0
rwobjpl 64 51124 0 44112 115 0 115 115 0 8 0
pdppl 4096 6258 0 6190 142 68 74 86 0 8 6
pvpl 32 15921 0 0 128 0 128 128 0 265 0
pmappl 248 3124 0 3095 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 500 0 115 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83804ff0) 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
x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline]
acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120
comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(31) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833d1572) at db_printf+0x9b
panic(ffffffff833910ca) at panic+0x103 sys/kern/subr_prf.c:216
malloc(188,2,a) at malloc+0xd7c sys/kern/kern_malloc.c:353
bpfopen(31700,41,2000,ffff80003c4f34a8) at bpfopen+0x11b
spec_open_clone(ffff80003c0d2a78) at spec_open_clone+0x287 sys/kern/spec_vnops.c:722
end trace frame: 0xffff80003c0d2a60, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff83804ff0) 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
x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline]
acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120
comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(31) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff833d1572) at db_printf+0x9b
panic(ffffffff833910ca) at panic+0x103 sys/kern/subr_prf.c:216
malloc(188,2,a) at malloc+0xd7c sys/kern/kern_malloc.c:353
bpfopen(31700,41,2000,ffff80003c4f34a8) at bpfopen+0x11b
spec_open_clone(ffff80003c0d2a78) at spec_open_clone+0x287 sys/kern/spec_vnops.c:722
spec_open(ffff80003c0d2a78) at spec_open+0x329 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806ed55a50,41,fffffd807f7d3068,ffff80003c4f34a8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff80003c0d2cc8,41,0) at vn_open+0x708 sys/kern/vfs_vnops.c:177
doopenat(ffff80003c4f34a8,ffffff9c,400000000440,40,0,ffff80003c0d2e70) at doopenat+0x32e sys/kern/vfs_syscalls.c:1139
syscall(ffff80003c0d2f20) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c0d2f20) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x512072722b0, count: -20
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x680
savectx() at savectx+0xae
end of kernel
end trace frame: 0xb1e9e320ce0, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0xb1e9e320ce0, count: -1