uvm_fault(0xffffffff83504770, 0xffff8000148925a6, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 333806 22491 0 0 0 0 syz-executor * 27687 71495 73 0x1100010 0 1K syslogd memset() at memset+0x49 ffs_write(ffff80002a069e70) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e293128,ffff80002a06a090,3,fffffd807f7d3a28) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a4ab0,ffff80002a06a090,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd6d8,12,ffff80002a06a090,0,ffff80002a06a150) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd6d8,ffff80002a06a200,ffff80002a06a150) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a200) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a200) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x712e7e2bee60, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff83504770, 0xffff8000148925a6, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a069e70) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e293128,ffff80002a06a090,3,fffffd807f7d3a28) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a4ab0,ffff80002a06a090,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd6d8,12,ffff80002a06a090,0,ffff80002a06a150) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd6d8,ffff80002a06a200,ffff80002a06a150) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a200) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a200) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x712e7e2bee60, count: -8 ddb{1}> show registers rdi 0xffff8000148925a6 rsi 0 rbp 0xffff80002a069d90 rbx 0x5a6 rdx 0x2 rcx 0x2 rax 0 r8 0x258 r9 0xffff80002a069cf0 r10 0x9c20cfdd26efea97 r11 0xffff8000148925a6 r12 0x800 r13 0x5a6 r14 0xfffffd806e293128 r15 0x1 rip 0xffffffff810078b9 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a069b88 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syslogd) tid=27687 pid=71495 tcnt=1 stat=onproc flags process=1100010 proc=0 runpri=52, usrpri=52, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd450,0xffff8000ffffccc8 process=0xffff8000ffffa450 user=0xffff80002a065000, vmspace=0xfffffd806ee1f378 estcpu=2, cpticks=3, pctcpu=7.65, user=8, sys=906, intr=358 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20339 400969 71377 0 2 0 syz-executor 20339 478467 71377 0 3 0x4000080 fsleep syz-executor 68786 253500 53931 0 2 0 syz-executor 68786 311620 53931 0 3 0x4000080 fsleep syz-executor 45308 473709 92391 0 2 0 syz-executor 45308 302373 92391 0 2 0x4000000 syz-executor 28333 410129 30171 0 3 0x80 nanoslp syz-executor 28333 114810 30171 0 3 0x4000000 smrbar syz-executor 28333 447031 30171 0 3 0x4000080 fsleep syz-executor 62076 836 93025 0 2 0x10 syz-executor 62076 22978 93025 0 3 0x4000090 ttyout syz-executor 62076 88282 93025 0 3 0x4000090 fsleep syz-executor 22491 333806 18312 0 7 0 syz-executor 22491 341876 18312 0 2 0x4000000 syz-executor 27708 437395 87675 0 3 0x80 nanoslp syz-executor 27708 124280 87675 0 3 0x4000080 kqsel syz-executor 27708 250470 87675 0 3 0x4000080 fsleep syz-executor 44859 96549 78065 0 3 0x80 nanoslp syz-executor 44859 481343 78065 0 3 0x4000080 kqread syz-executor 44859 10656 78065 0 3 0x4000080 fsleep syz-executor 78065 124798 93871 0 3 0x82 nanoslp syz-executor 71377 344373 93871 0 3 0x82 nanoslp syz-executor 93025 459909 93871 0 3 0x82 nanoslp syz-executor 53931 118658 93871 0 3 0x82 nanoslp syz-executor 87675 240716 93871 0 3 0x82 nanoslp syz-executor 92391 195662 93871 0 3 0x82 nanoslp syz-executor 30171 159545 93871 0 3 0x82 nanoslp syz-executor 18312 76320 93871 0 3 0x82 nanoslp syz-executor 57967 255587 0 0 3 0x14200 acct acct 10503 102162 91813 0 3 0x82 netio sshd-session 89572 289303 0 0 3 0x14200 bored sosplice 93871 474606 4326 0 3 0x82 kqread syz-executor 4326 101497 58598 0 3 0x10008a sigsusp ksh 58598 117859 75682 0 3 0x98 kqread sshd-session 75682 380140 91813 0 3 0x92 kqread sshd-session 24350 214311 1 0 3 0x100083 ttyopn getty 91813 338414 1 0 3 0x88 kqread sshd 77964 387092 12971 74 3 0x1100092 bpf pflogd 12971 42629 1 0 3 0x80 sbwait pflogd *71495 27687 38262 73 7 0x1100010 syslogd 38262 401592 1 0 3 0x100082 sbwait syslogd 66531 187895 1 0 3 0x100080 kqread resolvd 2471 72129 48078 77 3 0x100092 kqread dhcpleased 85844 483232 48078 77 3 0x100092 kqread dhcpleased 48078 458702 1 0 3 0x80 kqread dhcpleased 17037 133828 0 0 3 0x14200 bored smr 36295 506730 0 0 2 0x14200 zerothread 41660 291280 0 0 3 0x14200 aiodoned aiodoned 36111 523150 0 0 3 0x14200 syncer update 46789 507534 0 0 3 0x14200 cleaner cleaner 21392 403796 0 0 3 0x14200 reaper reaper 91081 179106 0 0 3 0x14200 pgdaemon pagedaemon 36780 250086 0 0 3 0x14200 bored viomb 23338 426071 0 0 3 0x40014200 acpi0 acpi0 77435 21808 0 0 3 0x40014200 idle1 21676 287631 0 0 3 0x14200 bored softnet3 14111 197493 0 0 3 0x14200 bored softnet2 38930 296054 0 0 3 0x14200 bored softnet1 75442 51651 0 0 3 0x14200 bored softnet0 96563 387267 0 0 3 0x14200 bored systqmp 2995 112971 0 0 3 0x14200 bored systq 53098 402121 0 0 3 0x14200 tmoslp softclockmp 13050 503648 0 0 3 0x40014200 tmoslp softclock 72590 190950 0 0 3 0x40014200 idle0 1 396745 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 28333 (syz-executor) thread 0xffff8000ffff5c00 (114810) exclusive rwlock clonelk r = 0 (0xffffffff834246d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 if_clone_destroy+0x67 #2 tun_dev_close+0x1ce sys/net/if_tun.c:521 #3 spec_close+0x412 #4 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #5 vn_close+0xa3 sys/kern/vfs_vnops.c:292 #6 sys_ktrace+0x14e sys/kern/kern_ktrace.c:552 #7 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #7 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 Process 71495 (syslogd) thread 0xffff8000ffffd6d8 (27687) exclusive rrwlock inode r = 0 (0xfffffd806e4d8c50) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_writev+0xd8 sys/kern/sys_generic.c:327 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83553178) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vn_write+0x4e sys/kern/vfs_vnops.c:393 #2 dofilewritev+0x23c sys/kern/sys_generic.c:380 #3 sys_writev+0xd8 sys/kern/sys_generic.c:327 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10202 10113K 10567K 166960K 12479 0 pcb 18 16K 18K 166960K 290 0 rtable 214 7K 8K 166960K 1745 0 pf 35 17K 25K 166960K 170 0 ifaddr 39 6K 8K 166960K 218 0 ifgroup 55 2K 2K 166960K 244 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 164 0 ioctlops 0 0K 4K 166960K 1721 0 iov 0 0K 28K 166960K 50 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1461 92K 92K 166960K 2649 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 99 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 18 65K 93K 166960K 1428 0 sigio 0 0K 0K 166960K 16 0 proc 72 91K 128K 166960K 1685 0 subproc 104 6K 6K 166960K 611 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 155 0 in_multi 87 6K 7K 166960K 562 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 1022 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 262 74K 91K 166960K 12449 0 UVM aobj 10 2K 4K 166960K 15 0 pinsyscall 45 90K 106K 166960K 3521 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 37 0 NDP 12 0K 2K 166960K 157 0 temp 62 6820K 6904K 166960K 34856 0 kqueue 14 20K 30K 166960K 139 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 120 155 0 152 1 0 1 1 0 8 0 rtentry 112 573 0 477 5 1 4 4 0 8 0 unpcb 144 903 0 882 10 8 2 8 0 8 1 syncache 336 8 0 8 4 3 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 344 0 335 10 8 2 8 0 8 0 arp 120 103 0 89 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 3 0 3 1 0 1 1 0 8 1 inpcb 336 1388 0 1374 18 16 2 15 0 8 0 nd6 136 149 0 128 1 0 1 1 0 8 0 pkpcb 40 7 0 7 4 3 1 1 0 8 1 kcovpl 48 47 0 39 1 0 1 1 0 8 0 ppxss 1168 7 0 7 3 3 0 1 0 8 0 pfstscr 40 130 0 130 1 1 0 1 0 8 0 pffrag 232 8 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 6 1 0 1 1 0 8 0 pffrent 40 56 0 54 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 2 0 1 1 0 1 1 0 8 0 pfstitem 24 109 0 73 1 0 1 1 0 8 0 pfstkey 128 178 0 142 2 0 2 2 0 8 0 pfstate 376 175 0 140 5 0 5 5 0 8 0 pfrule 1344 33 0 18 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2273 0 1865 33 4 29 30 0 8 0 art_table 32 2274 0 1865 4 0 4 4 0 8 0 art_node 16 569 0 482 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 2 1 1 1 0 8 0 semapl 112 94 0 84 1 0 1 1 0 8 0 shmpl 112 12 0 5 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3056 0 1474 99 0 99 99 0 8 0 ffsino 272 3056 0 1474 106 0 106 106 0 8 0 nchpl 144 4269 0 2523 65 0 65 65 0 8 0 uvmvnodes 80 4106 0 0 84 0 84 84 0 8 0 vnodes 216 4106 0 0 229 0 229 229 0 8 0 namei 1024 18627 0 18627 5 4 1 2 0 8 1 percpumem 16 96 0 50 1 0 1 1 0 8 0 kstatmem 264 124 0 100 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 26650 0 26650 13 10 3 8 1 8 3 plimitpl 152 160 0 142 1 0 1 1 0 8 0 sigapl 424 1653 0 1600 9 2 7 7 0 8 0 futexpl 64 11575 0 11569 4 3 1 1 0 8 0 knotepl 120 552 0 0 17 0 17 17 0 8 0 kqueuepl 216 287 0 275 5 4 1 3 0 8 0 pipepl 320 371 0 343 3 0 3 3 0 8 0 fdescpl 496 1632 0 1599 6 1 5 5 0 8 0 filepl 152 8947 0 8684 31 18 13 22 0 8 2 lockfpl 104 552 0 548 2 1 1 2 0 8 0 lockfspl 48 222 0 219 1 0 1 1 0 8 0 sessionpl 144 63 0 53 1 0 1 1 0 8 0 pgrppl 48 122 0 104 1 0 1 1 0 8 0 ucredpl 104 1158 0 1144 1 0 1 1 0 8 0 zombiepl 144 1600 0 1600 1 0 1 1 0 8 1 processpl 1160 1653 0 1600 6 2 4 5 0 8 0 procpl 648 2837 0 2772 8 2 6 7 0 8 0 srpgc 96 6 0 6 3 2 1 1 0 8 1 sosppl 168 5 0 5 4 4 0 1 0 8 0 sockpl 664 2461 0 2423 29 25 4 19 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 244 0 0 28 0 28 28 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 747 0 0 44 0 44 44 0 8 0 bufpl 280 8492 0 1674 488 0 488 488 0 8 0 anonpl 24 253054 0 248739 75 20 55 72 0 185 17 amapchunkpl 152 39488 0 38914 37 3 34 34 0 158 11 amappl16 200 4499 0 4476 30 25 5 23 0 8 2 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 196 0 183 1 0 1 1 0 8 0 amappl13 176 36 0 36 1 1 0 1 0 8 0 amappl12 168 2898 0 2864 4 2 2 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 9 0 8 2 1 1 1 0 8 0 amappl9 144 157 0 157 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 181 0 168 1 0 1 1 0 8 0 amappl6 120 552 0 550 1 0 1 1 0 8 0 amappl5 112 291 0 278 1 0 1 1 0 8 0 amappl4 104 430 0 410 1 0 1 1 0 8 0 amappl3 96 7789 0 7666 4 0 4 4 0 8 0 amappl2 88 1228 0 1151 2 0 2 2 0 8 0 amappl1 80 14232 0 13574 17 2 15 16 0 8 0 amappl 88 11713 0 11520 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 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 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 14 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1632 0 1599 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1632 0 1599 1 0 1 1 0 8 0 vmmpekpl 168 14507 0 14466 3 0 3 3 0 8 0 vmmpepl 168 105740 0 103679 117 24 93 107 0 357 2 vmsppl 440 1631 0 1599 6 2 4 5 0 8 0 rwobjpl 56 35056 0 29888 74 0 74 74 0 8 0 pdppl 4096 3271 0 3198 155 80 75 85 0 8 2 pvpl 32 29992 0 0 243 1 242 242 0 265 0 pmappl 248 1631 0 1599 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 517 0 121 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83466ff0) 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 end of kernel end trace frame: 0x7c04b28df4c0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff83466ff0) 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 end of kernel end trace frame: 0x7c04b28df4c0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a069e70) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e293128,ffff80002a06a090,3,fffffd807f7d3a28) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a4ab0,ffff80002a06a090,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd6d8,12,ffff80002a06a090,0,ffff80002a06a150) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd6d8,ffff80002a06a200,ffff80002a06a150) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a200) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a200) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x712e7e2bee60, count: 7 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a069e70) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e293128,ffff80002a06a090,3,fffffd807f7d3a28) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a4ab0,ffff80002a06a090,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd6d8,12,ffff80002a06a090,0,ffff80002a06a150) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd6d8,ffff80002a06a200,ffff80002a06a150) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a200) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a200) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x712e7e2bee60, count: -8