panic: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1219
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
277485 36269 32767 0x10 0x4000000 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834bb2e9) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834f838c,ffffffff834d1f7b,4c3,ffffffff8348c944) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000fffe7ca8) at fdfree+0x349
exit1(ffff8000fffe7ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffe7ca8,ffff800036faca20,ffff800036fac970) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800036faca20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800036faca20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78997e0d9070, count: 7
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: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1219
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834bb2e9) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834f838c,ffffffff834d1f7b,4c3,ffffffff8348c944) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000fffe7ca8) at fdfree+0x349
exit1(ffff8000fffe7ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffe7ca8,ffff800036faca20,ffff800036fac970) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800036faca20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800036faca20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78997e0d9070, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800036fac760
rbx 0xffffffff838f5e07 cpu_info_full_primary+0x2e07
rdx 0
rcx 0xffff8000fffe7ca8
rax 0xffffffff838f4ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x796eebb8de43ad0
r11 0x924788f12577242d
r12 0xffffffff838f5c08 cpu_info_full_primary+0x2c08
r13 0
r14 0
r15 0x1
rip 0xffffffff81abcb95 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff800036fac750
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=204966 pid=34731 tcnt=0 stat=onproc
flags process=1018<EXITING,SUGID,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=53, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffe7ca8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff8000fffe6a80,0xffff8000fffef4e8
process=0xffff80003c3ce1d0 user=0xffff800036fa7000, vmspace=0xfffffd806c6a3ba0
estcpu=3, cpticks=5, pctcpu=0.2, user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
65593 120942 51643 32767 2 0x10 syz-executor
65593 415417 51643 32767 3 0x4000090 fsleep syz-executor
31648 156219 12004 0 2 0x100002 sh
2918 15523 76025 32767 2 0x10 syz-executor
2918 61820 76025 32767 3 0x4000090 fsleep syz-executor
31521 293140 32235 32767 2 0x10 syz-executor
31521 162551 32235 32767 2 0x4000010 syz-executor
68249 224511 72391 32767 2 0x10 syz-executor
68249 415462 72391 32767 3 0x4000090 fsleep syz-executor
68249 5601 72391 32767 3 0x4000090 fsleep syz-executor
36269 195464 21403 32767 2 0xc90 syz-executor
36269 277485 21403 32767 7 0x4000010 syz-executor
36269 66892 21403 32767 3 0x4000090 fsleep syz-executor
32235 206802 76322 32767 2 0xc90 syz-executor
51643 185422 29259 32767 2 0xc90 syz-executor
72391 20265 41073 32767 2 0xc90 syz-executor
76025 189772 39913 32767 2 0xc90 syz-executor
12004 396206 76 0 3 0x80 wait syz-executor
16572 12734 60952 32767 2 0x10 syz-executor
21403 475181 31721 32767 2 0xc90 syz-executor
35111 361672 36975 32767 2 0xc90 syz-executor
39913 49883 93177 0 3 0x82 wait syz-executor
41073 231342 93177 0 3 0x82 wait syz-executor
76 343549 93177 0 3 0x82 wait syz-executor
60952 33509 93177 0 3 0x82 wait syz-executor
31721 464025 93177 0 3 0x82 wait syz-executor
29259 214486 93177 0 3 0x82 wait syz-executor
76322 279055 93177 0 3 0x82 wait syz-executor
36975 116350 93177 0 3 0x82 wait syz-executor
93177 136218 89995 0 3 0x82 kqread syz-executor
89995 52716 17680 0 3 0x10008a sigsusp ksh
17680 83981 74916 0 3 0x98 kqread sshd-session
74916 439301 14499 0 3 0x92 kqread sshd-session
25784 341778 1 0 3 0x100083 ttyin getty
14499 245806 1 0 3 0x88 kqread sshd
39802 125578 4926 73 3 0x1100090 kqread syslogd
4926 331214 1 0 3 0x100082 sbwait syslogd
8064 411416 1 0 3 0x100080 kqread resolvd
29263 489434 73020 77 3 0x100092 kqread dhcpleased
11206 58424 73020 77 3 0x100092 kqread dhcpleased
73020 352826 1 0 3 0x80 kqread dhcpleased
17032 332339 0 0 3 0x14200 bored smr
44914 399880 0 0 2 0x14200 zerothread
94511 131267 0 0 3 0x14200 aiodoned aiodoned
8569 425151 0 0 3 0x14200 syncer update
60246 262467 0 0 3 0x14200 cleaner cleaner
33525 131118 0 0 2 0x14200 reaper
10966 144731 0 0 3 0x14200 pgdaemon pagedaemon
73034 412055 0 0 3 0x14200 bored viomb
64213 369858 0 0 3 0x40014200 acpi0 acpi0
30046 272263 0 0 3 0x40014200 idle1
4254 497265 0 0 3 0x14200 bored softnet1
25267 219426 0 0 2 0x14200 softnet0
2790 461001 0 0 3 0x14200 smrbar systqmp
79732 255570 0 0 3 0x14200 bored systq
15155 164009 0 0 3 0x14200 tmoslp softclockmp
10505 492207 0 0 3 0x40014200 tmoslp softclock
53105 353379 0 0 3 0x40014200 idle0
1 71032 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 16572 (syz-executor) thread 0xffff8000fffeed10 (12734)
exclusive rrwlock inode r = 0 (0xfffffd806c6ed1e8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vget+0x2a2 sys/kern/vfs_subr.c:686
#6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1893
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806cdd0300)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6 namei+0x7c5 sys/kern/vfs_lookup.c:250
#7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1893
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
Process 2790 (systqmp) thread 0xffff8000ffffecf8 (461001)
shared rwlock systqmp r = 0 (0xffffffff838d0d48)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11051 12018K 12034K 166960K 12142 0
pcb 17 12K 12K 166960K 17 0
rtable 239 6K 7K 166960K 349 0
pf 31 16K 16K 166960K 31 0
ifaddr 42 7K 7K 166960K 44 0
ifgroup 50 2K 2K 166960K 50 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 70 0
ioctlops 0 0K 2K 166960K 30 0
iov 0 0K 8K 166960K 6 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1287 81K 81K 166960K 1355 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 5 0K 0K 166960K 5 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 24 89K 125K 166960K 178 0
sigio 0 0K 0K 166960K 2 0
proc 58 99K 163K 166960K 506 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 4 0K 0K 166960K 13 0
in_multi 100 7K 7K 166960K 100 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 49 228K 228K 166960K 49 0
exec 0 0K 1K 166960K 364 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 246 169K 175K 166960K 3186 0
UVM aobj 4 2K 2K 166960K 4 0
pinsyscall 46 92K 110K 166960K 1245 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 1 0K 0K 166960K 2 0
NDP 27 2K 2K 166960K 27 0
temp 37 9111K 9116K 166960K 3717 0
kqueue 15 20K 23K 166960K 39 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> 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 39 0 36 1 0 1 1 0 8 0
rtentry 176 112 0 1 6 0 6 6 0 8 0
unpcb 144 57 0 42 1 0 1 1 0 8 0
syncache 336 4 0 4 1 0 1 1 0 8 1
sackhl 24 1 0 1 1 0 1 1 0 8 1
tcpcb 736 21 0 15 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 105 0 94 2 0 2 2 0 8 0
nd6 152 25 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 256 469 0 0 30 0 30 30 0 8 0
art_table 40 470 0 0 5 0 5 5 0 8 0
art_node 32 112 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0
semupl 112 1 0 0 1 0 1 1 0 8 0
semapl 72 3 0 0 1 0 1 1 0 8 0
shmpl 112 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1601 0 136 92 0 92 92 0 8 0
ffsino 296 1601 0 136 113 0 113 113 0 8 0
nchpl 144 1847 0 153 63 0 63 63 0 8 0
vnodes 216 1682 0 0 94 0 94 94 0 8 0
namei 1024 5394 0 5394 1 0 1 1 0 8 1
percpumem 16 50 0 0 1 0 1 1 0 8 0
kstatmem 264 25 0 0 2 0 2 2 0 8 0
scxspl 216 6485 0 6485 6 2 4 4 1 8 4
plimitpl 152 46 0 21 2 0 2 2 0 8 1
sigapl 424 467 0 414 7 0 7 7 0 8 0
knotepl 120 109 0 0 4 0 4 4 0 8 0
kqueuepl 224 29 0 19 1 0 1 1 0 8 0
pipepl 344 126 0 99 3 0 3 3 0 8 0
fdescpl 528 451 0 414 4 0 4 4 0 8 0
filepl 160 1631 0 1418 11 0 11 11 0 8 1
lockfpl 104 8 0 6 1 0 1 1 0 8 0
lockfspl 48 5 0 3 1 0 1 1 0 8 0
sessionpl 144 27 0 11 1 0 1 1 0 8 0
pgrppl 48 35 0 11 1 0 1 1 0 8 0
ucredpl 104 149 0 131 1 0 1 1 0 8 0
zombiepl 144 415 0 414 1 0 1 1 0 8 0
processpl 1232 467 0 414 5 0 5 5 0 8 0
procpl 664 527 0 466 6 0 6 6 0 8 0
sockpl 752 201 0 172 5 0 5 5 0 8 1
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 125 0 0 16 0 16 16 0 8 0
mcl2k 2048 15 0 0 2 0 2 2 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 175 0 0 11 0 11 11 0 8 0
bufpl 280 2265 0 102 155 0 155 155 0 8 0
anonpl 32 3497 0 0 29 0 29 29 0 246 0
amapchunkpl 152 8808 0 8268 23 0 23 23 0 158 0
amappl16 200 1485 0 1467 5 0 5 5 0 8 3
amappl15 192 31 0 31 1 0 1 1 0 8 1
amappl14 184 412 0 410 1 0 1 1 0 8 0
amappl13 176 114 0 104 1 0 1 1 0 8 0
amappl12 168 678 0 643 2 0 2 2 0 8 0
amappl11 160 2 0 2 1 0 1 1 0 8 1
amappl10 152 66 0 56 1 0 1 1 0 8 0
amappl9 144 271 0 271 1 0 1 1 0 8 1
amappl8 136 92 0 91 1 0 1 1 0 8 0
amappl7 128 141 0 129 1 0 1 1 0 8 0
amappl6 120 151 0 148 1 0 1 1 0 8 0
amappl5 112 104 0 97 1 0 1 1 0 8 0
amappl4 104 257 0 241 1 0 1 1 0 8 0
amappl3 96 1573 0 1445 5 1 4 4 0 8 0
amappl2 88 501 0 448 2 0 2 2 0 8 0
amappl1 80 10173 0 9597 14 0 14 14 0 8 0
amappl 88 2519 0 2339 5 0 5 5 0 92 0
uvmvnodes 80 99 0 0 3 0 3 3 0 8 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 0 1 0 1 1 0 8 0
uaddrrnd 24 451 0 414 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 451 0 414 1 0 1 1 0 8 0
vmmpekpl 168 5493 0 5460 2 0 2 2 0 8 0
vmmpepl 168 37569 0 35550 93 0 93 93 0 357 1
vmsppl 488 450 0 414 7 1 6 6 0 8 0
rwobjpl 80 13975 0 13020 22 0 22 22 0 8 0
pdppl 4096 909 0 828 107 10 97 97 0 8 16
pvpl 32 10251 0 0 83 0 83 83 0 265 0
pmappl 256 450 0 414 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 275 0 13 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834bb2e9) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834f838c,ffffffff834d1f7b,4c3,ffffffff8348c944) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000fffe7ca8) at fdfree+0x349
exit1(ffff8000fffe7ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffe7ca8,ffff800036faca20,ffff800036fac970) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800036faca20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800036faca20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78997e0d9070, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff80002999dff0) 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
__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(ffffffff83ab9680) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83ab9680) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
sysctl_file(ffff80003c3d5978,4,200000000100,ffff80003c3d59a8,ffff8000fffeea78) at sysctl_file+0x2d20 sys/kern/kern_sysctl.c:1796
kern_sysctl(ffff80003c3d5974,5,200000000100,ffff80003c3d59a8,0,37,7312dc20c7762fd0) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
sys_sysctl(ffff8000fffeea78,ffff80003c3d5ae0,ffff80003c3d5a30) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80003c3d5ae0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3d5ae0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4959a16c030, count: 5
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) 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
__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(ffffffff83ab9680) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83ab9680) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
sysctl_file(ffff80003c3d5978,4,200000000100,ffff80003c3d59a8,ffff8000fffeea78) at sysctl_file+0x2d20 sys/kern/kern_sysctl.c:1796
kern_sysctl(ffff80003c3d5974,5,200000000100,ffff80003c3d59a8,0,37,7312dc20c7762fd0) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
sys_sysctl(ffff8000fffeea78,ffff80003c3d5ae0,ffff80003c3d5a30) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80003c3d5ae0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3d5ae0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4959a16c030, count: -10