panic: pool_do_put: shmpl: double pool_put: 0xfffffd8066ad1ee0
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
137346 40900 32767 0x10 0x4000000 0 syz-executor
*412117 12021 32767 0x10 0x4000000 1K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83070915) at panic+0x1e5 sys/kern/subr_prf.c:198
pool_do_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_do_put+0x1be sys/kern/subr_pool.c:841
pool_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_put+0xb3 sys/kern/subr_pool.c:799
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
syscall(ffff8000371f4e00) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371f4e00) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf88688c1750, count: 8
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: pool_do_put: shmpl: double pool_put: 0xfffffd8066ad1ee0
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83070915) at panic+0x1e5 sys/kern/subr_prf.c:198
pool_do_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_do_put+0x1be sys/kern/subr_pool.c:841
pool_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_put+0xb3 sys/kern/subr_pool.c:799
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
syscall(ffff8000371f4e00) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371f4e00) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf88688c1750, count: -7
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000371f4b30
rbx 0xffff800029b7cd87
rdx 0
rcx 0xffff8000fffeaf58
rax 0xffff800029b7bff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xc0867893ee54f7fd
r11 0xb4e5c702bdc77749
r12 0xffff800029b7cb88
r13 0
r14 0
r15 0x1
rip 0xffffffff81e2a4b5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff8000371f4b20
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=412117 pid=12021 tcnt=3 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffff7bf0,0xffff8000fffea548
process=0xffff8000ffff1fd0 user=0xffff8000371ef000, vmspace=0xfffffd806c22d540
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
40390 462481 76672 32767 2 0x10 syz-executor
95367 190090 39784 32767 3 0x90 nanoslp syz-executor
95367 375151 39784 32767 3 0x4000090 fsleep syz-executor
95367 114682 39784 32767 3 0x4000090 fsleep syz-executor
40900 411566 92690 32767 2 0x10 syz-executor
40900 243702 92690 32767 2 0x4000010 syz-executor
40900 137346 92690 32767 7 0x4000010 syz-executor
12021 167681 474 32767 2 0x10 syz-executor
*12021 412117 474 32767 7 0x4000010 syz-executor
12021 260448 474 32767 3 0x4000090 fsleep syz-executor
36063 39687 45545 32767 2 0x10 syz-executor
36063 241565 45545 32767 3 0x4000090 fsleep syz-executor
80066 518460 44667 32767 3 0x90 nanoslp syz-executor
80066 345865 44667 32767 3 0x4000090 msgwait syz-executor
80066 435685 44667 32767 3 0x4000090 fsleep syz-executor
58015 12019 748 32767 2 0x10 syz-executor
58015 355565 748 32767 3 0x4000090 kqread syz-executor
58015 456277 748 32767 3 0x4000090 fsleep syz-executor
27984 321085 27902 0 3 0x100082 sbwait arp
27902 62382 7461 0 3 0x10008a sigsusp sh
474 448865 92937 32767 3 0x90 nanoslp syz-executor
45545 392066 59911 32767 3 0x90 nanoslp syz-executor
44667 20566 31315 32767 3 0x90 nanoslp syz-executor
76672 196541 36180 32767 3 0x90 nanoslp syz-executor
748 151667 62454 32767 3 0x90 nanoslp syz-executor
39784 264299 97384 32767 3 0x90 nanoslp syz-executor
92690 238698 67803 32767 3 0x90 nanoslp syz-executor
7461 165082 59999 0 3 0x80 wait syz-executor
92937 101121 89148 0 3 0x82 wait syz-executor
59911 407504 89148 0 3 0x82 wait syz-executor
36180 196741 89148 0 3 0x82 wait syz-executor
31315 316346 89148 0 3 0x82 wait syz-executor
62454 241004 89148 0 3 0x82 wait syz-executor
67803 107603 89148 0 3 0x82 wait syz-executor
97384 451852 89148 0 3 0x82 wait syz-executor
59999 186835 89148 0 3 0x82 wait syz-executor
89148 352290 50735 0 3 0x82 kqread syz-executor
50735 358071 60660 0 3 0x10008a sigsusp ksh
60660 22610 83621 0 3 0x98 kqread sshd-session
83621 200469 43570 0 3 0x92 kqread sshd-session
87639 511793 1 0 3 0x100083 ttyin getty
43570 517250 1 0 3 0x88 kqread sshd
58628 521758 93367 73 3 0x1100090 kqread syslogd
93367 284749 1 0 3 0x100082 sbwait syslogd
40881 255479 1 0 3 0x100080 kqread resolvd
52538 371558 76923 77 3 0x100092 kqread dhcpleased
21779 369670 76923 77 3 0x100092 kqread dhcpleased
76923 347161 1 0 3 0x80 kqread dhcpleased
93046 476548 0 0 3 0x14200 bored smr
29932 479167 0 0 2 0x14200 zerothread
56153 429856 0 0 3 0x14200 aiodoned aiodoned
15916 401742 0 0 3 0x14200 syncer update
84127 282878 0 0 3 0x14200 cleaner cleaner
95485 254653 0 0 3 0x14200 reaper reaper
32241 514174 0 0 3 0x14200 pgdaemon pagedaemon
17659 358433 0 0 3 0x14200 bored viomb
65374 79433 0 0 3 0x40014200 acpi0 acpi0
43791 159828 0 0 3 0x40014200 idle1
3549 280353 0 0 3 0x14200 bored softnet3
99119 514479 0 0 3 0x14200 bored softnet2
94330 340022 0 0 3 0x14200 bored softnet1
55304 463545 0 0 3 0x14200 bored softnet0
18421 349948 0 0 3 0x14200 bored systqmp
82454 329475 0 0 3 0x14200 bored systq
44146 360288 0 0 3 0x14200 tmoslp softclockmp
43454 512738 0 0 3 0x40014200 tmoslp softclock
10485 280757 0 0 3 0x40014200 idle0
1 86933 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex shmpl r = 0 (0xffffffff8356b158)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pool_put+0x9f sys/kern/subr_pool.c:797
#4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
#4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
#5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#6 Xsyscall+0x128
Process 12021 (syz-executor) thread 0xffff8000fffeaf58 (412117)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83543d28)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 __mp_acquire_count+0x58
#2 mi_switch+0x658 sys/kern/sched_bsd.c:460
#3 sleep_finish+0x219 sys/kern/kern_synch.c:416
#4 rw_enter+0x348 sys/kern/kern_rwlock.c:285
#5 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252
#6 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792
#7 shm_delete_mapping+0xa0 sys/kern/sysv_shm.c:170
#8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
exclusive mutex shmpl r = 0 (0xffffffff8356b158)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pool_put+0x9f sys/kern/subr_pool.c:797
#4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
#4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
#5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#6 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10176 10023K 10036K 166960K 11254 0
pcb 17 12K 12K 166960K 17 0
rtable 222 6K 6K 166960K 328 0
pf 31 16K 16K 166960K 31 0
ifaddr 40 7K 7K 166960K 42 0
ifgroup 50 2K 2K 166960K 50 0
counters 64 36K 36K 166960K 64 0
ioctlops 0 0K 2K 166960K 29 0
iov 0 0K 2K 166960K 1 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1363 86K 86K 166960K 1380 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 3 5K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 3 0K 0K 166960K 3 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 27 101K 121K 166960K 175 0
proc 56 78K 127K 166960K 480 0
subproc 104 6K 6K 166960K 104 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 3 0
in_multi 89 6K 6K 166960K 89 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 37 175K 175K 166960K 37 0
exec 0 0K 1K 166960K 362 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 254 74K 74K 166960K 3046 0
UVM aobj 3 2K 2K 166960K 4 0
pinsyscall 49 98K 112K 166960K 1149 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 1 0K 0K 166960K 4 0
NDP 25 1K 1K 166960K 25 0
temp 37 6814K 6878K 166960K 3683 0
kqueue 14 22K 22K 166960K 26 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 36 0 32 1 0 1 1 0 8 0
rtentry 112 105 0 1 3 0 3 3 0 8 0
unpcb 144 60 0 42 1 0 1 1 0 8 0
syncache 336 3 0 3 2 1 1 1 0 8 1
tcpcb 808 28 0 22 2 0 2 2 0 8 1
arp 120 17 0 0 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 336 97 0 85 2 0 2 2 0 8 0
nd6 136 23 0 0 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 256 428 0 0 27 0 27 27 0 8 0
art_table 32 429 0 0 4 0 4 4 0 8 0
art_node 16 104 0 9 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1
semapl 112 1 0 0 1 0 1 1 0 8 0
shmpl 112 1 0 1 1 0 1 1 0 8 1
pool(shmpl): free list modified: page 0xfffffd8066ad1000; item ordinal 0; addr 0xfffffd8066ad1ee0 (p 0xfffffd8066ad1000); offset 0x1c=0xdeafbeac
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1578 0 80 94 0 94 94 0 8 0
ffsino 272 1578 0 80 100 0 100 100 0 8 0
nchpl 144 1813 0 142 63 0 63 63 0 8 0
uvmvnodes 80 1691 0 0 35 0 35 35 0 8 0
vnodes 216 1691 0 0 94 0 94 94 0 8 0
namei 1024 5249 0 5249 1 0 1 1 0 8 1
percpumem 16 46 0 0 1 0 1 1 0 8 0
kstatmem 264 22 0 0 2 0 2 2 0 8 0
scxspl 216 5200 0 5200 3 1 2 2 1 8 2
plimitpl 152 39 0 15 2 0 2 2 0 8 1
sigapl 424 445 0 388 7 0 7 7 0 8 0
futexpl 64 481 0 475 1 0 1 1 0 8 0
knotepl 120 50 0 0 2 0 2 2 0 8 0
kqueuepl 216 30 0 20 1 0 1 1 0 8 0
pipepl 320 99 0 72 3 0 3 3 0 8 0
fdescpl 496 427 0 388 7 1 6 6 0 8 0
filepl 152 1462 0 1219 10 0 10 10 0 8 0
lockfpl 104 12 0 10 1 0 1 1 0 8 0
lockfspl 48 7 0 5 1 0 1 1 0 8 0
sessionpl 144 21 0 5 1 0 1 1 0 8 0
pgrppl 48 29 0 5 1 0 1 1 0 8 0
ucredpl 104 93 0 75 1 0 1 1 0 8 0
zombiepl 144 388 0 388 1 0 1 1 0 8 1
processpl 1160 445 0 388 5 0 5 5 0 8 0
procpl 648 514 0 446 7 0 7 7 0 8 1
sockpl 664 194 0 160 4 0 4 4 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 238 0 0 30 0 30 30 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 245 0 0 16 0 16 16 0 8 0
bufpl 280 2188 0 89 150 0 150 150 0 8 0
anonpl 24 159296 0 155924 47 1 46 46 0 185 24
amapchunkpl 152 10335 0 9777 25 1 24 24 0 158 0
amappl16 200 4318 0 4307 14 0 14 14 0 8 12
amappl15 192 11 0 11 1 0 1 1 0 8 1
amappl14 184 160 0 149 1 0 1 1 0 8 0
amappl13 176 17 0 17 1 0 1 1 0 8 1
amappl12 168 1042 0 1004 3 1 2 2 0 8 0
amappl11 160 53 0 43 1 0 1 1 0 8 0
amappl10 152 11 0 11 1 0 1 1 0 8 1
amappl9 144 137 0 137 1 0 1 1 0 8 1
amappl8 136 24 0 22 1 0 1 1 0 8 0
amappl7 128 100 0 89 1 0 1 1 0 8 0
amappl6 120 224 0 222 1 0 1 1 0 8 0
amappl5 112 121 0 113 1 0 1 1 0 8 0
amappl4 104 284 0 265 1 0 1 1 0 8 0
amappl3 96 1788 0 1681 3 0 3 3 0 8 0
amappl2 88 622 0 542 2 0 2 2 0 8 0
amappl1 80 7384 0 6804 14 0 14 14 0 8 0
amappl 88 2718 0 2521 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 3 0 1 1 0 1 1 0 8 0
pool(aobjpl): free list modified: page 0xfffffd80781f8000; item ordinal 0; addr 0xfffffd80781f8e10 (p 0xfffffd80781f8000); offset 0xc=0xdeadbeee
uaddrrnd 24 427 0 388 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 427 0 388 1 0 1 1 0 8 0
vmmpekpl 168 5439 0 5400 2 0 2 2 0 8 0
vmmpepl 168 35691 0 33611 103 0 103 103 0 357 9
vmsppl 440 426 0 388 5 0 5 5 0 8 0
rwobjpl 56 16479 0 13892 41 0 41 41 0 8 1
pdppl 4096 861 0 776 109 14 95 95 0 8 10
pvpl 32 14516 0 0 119 1 118 118 0 265 0
pmappl 248 426 0 388 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 393 0 17 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff834e9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
__mp_lock(ffffffff83543b20) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff83543b20) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
end trace frame: 0x0, count: 10
ddb{0}> trace
x86_ipi_db(ffffffff834e9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
__mp_lock(ffffffff83543b20) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff83543b20) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
end trace frame: 0x0, count: -5
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:437
panic(ffffffff83070915) at panic+0x1e5 sys/kern/subr_prf.c:198
pool_do_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_do_put+0x1be sys/kern/subr_pool.c:841
pool_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_put+0xb3 sys/kern/subr_pool.c:799
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
syscall(ffff8000371f4e00) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371f4e00) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf88688c1750, count: 8
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83070915) at panic+0x1e5 sys/kern/subr_prf.c:198
pool_do_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_do_put+0x1be sys/kern/subr_pool.c:841
pool_put(ffffffff8356b148,fffffd8066ad1ee0) at pool_put+0xb3 sys/kern/subr_pool.c:799
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline]
shm_delete_mapping(fffffd806c22d540,ffff800001194008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174
syscall(ffff8000371f4e00) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371f4e00) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf88688c1750, count: -7