uvm_fault(0xffffffff836190a8, 0xffff80001a4c2500, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memcpy+0x19: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 253324 3711 0 0 0 0 syz-executor *240496 27389 0 0x2 0 1K syz-executor memcpy() at memcpy+0x19 ffs_truncate(fffffd806ce92ab0,0,4,fffffd807f7d3680) at ffs_truncate+0xcb6 ufs_rmdir(ffff80002a0c0c78) at ufs_rmdir+0x374 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd8073d36510,fffffd806c9dce90,ffff80002a0c0d58) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000371d4538,ffffff9c,76b0c6470bc0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885 syscall(ffff80002a0c0ed0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0c0ed0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0c6470bb0, 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: uvm_fault(0xffffffff836190a8, 0xffff80001a4c2500, 0, 2) -> d ddb{1}> trace memcpy() at memcpy+0x19 ffs_truncate(fffffd806ce92ab0,0,4,fffffd807f7d3680) at ffs_truncate+0xcb6 ufs_rmdir(ffff80002a0c0c78) at ufs_rmdir+0x374 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd8073d36510,fffffd806c9dce90,ffff80002a0c0d58) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000371d4538,ffffff9c,76b0c6470bc0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885 syscall(ffff80002a0c0ed0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0c0ed0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0c6470bb0, count: -7 ddb{1}> show registers rdi 0xffff80001a4c2500 rsi 0xfffffd8079165200 rbp 0xffff80002a0c09e0 rbx 0 rdx 0x100 rcx 0x20 rax 0x19b r8 0xffffffffffffffff r9 0x19500 acpi_pdirpa+0x5371 r10 0xb4aef96d2ccd10e7 r11 0xffff80001a4c2500 r12 0xfffffd806ce92ab0 r13 0xfffffd8067f33a00 r14 0x1 r15 0xffff800000a5f000 rip 0xffffffff81fde5d9 memcpy+0x19 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a0c0978 ss 0x10 memcpy+0x19: repe movsq (%rsi),%es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=240496 pid=27389 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffcf40,0xffff8000371d5478 process=0xffff8000371c71f8 user=0xffff80002a0bb000, vmspace=0xfffffd806ce83c20 estcpu=36, cpticks=2, pctcpu=0.4, user=1, sys=9, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 43149 178055 75824 0 2 0 syz-executor 3711 253324 33623 0 7 0 syz-executor 3711 83555 33623 0 2 0x4000000 syz-executor 27600 432613 83170 0 2 0 syz-executor 27600 206404 83170 0 3 0x4000080 fsleep syz-executor 27600 6386 83170 0 3 0x4000080 fsleep syz-executor 84899 500075 54383 0 2 0 syz-executor 84899 211978 54383 0 3 0x4000080 fsleep syz-executor 2318 476577 94193 0 2 0 syz-executor 2318 361437 94193 0 2 0x4000000 syz-executor 59745 154209 5457 0 2 0 syz-executor 59745 142222 5457 0 3 0x4000080 ttyout syz-executor 59745 391513 5457 0 3 0x4000080 ttyout syz-executor 54383 507716 34730 0 2 0x482 syz-executor 33623 5596 34730 0 3 0x82 nanoslp syz-executor 83170 359495 34730 0 3 0x82 nanoslp syz-executor 46837 248856 34730 0 2 0x2 syz-executor *27389 240496 34730 0 7 0x2 syz-executor 94193 12075 34730 0 3 0x82 nanoslp syz-executor 5457 20638 34730 0 2 0x482 syz-executor 75824 424640 34730 0 3 0x82 nanoslp syz-executor 83466 434644 0 0 3 0x14200 bored sosplice 34730 158738 1430 0 2 0x2 syz-executor 1430 56719 93780 0 3 0x10008a sigsusp ksh 93780 298009 38707 0 3 0x98 kqread sshd-session 38707 232265 30601 0 3 0x92 kqread sshd-session 20632 500566 1 0 3 0x100083 ttyin getty 30601 243884 1 0 3 0x88 kqread sshd 37132 141463 52133 74 3 0x1100092 bpf pflogd 52133 36085 1 0 3 0x80 sbwait pflogd 99082 123441 95094 73 2 0x1100010 syslogd 95094 408191 1 0 3 0x100082 sbwait syslogd 5218 243532 1 0 3 0x100080 kqread resolvd 95526 81050 40044 77 3 0x100092 kqread dhcpleased 43343 509812 40044 77 3 0x100092 kqread dhcpleased 40044 464261 1 0 3 0x80 kqread dhcpleased 6134 17393 0 0 3 0x14200 bored smr 67840 473012 0 0 2 0x14200 zerothread 47975 365334 0 0 3 0x14200 aiodoned aiodoned 6890 85627 0 0 3 0x14200 syncer update 89665 271353 0 0 3 0x14200 cleaner cleaner 94801 319016 0 0 3 0x14200 reaper reaper 57336 465889 0 0 3 0x14200 pgdaemon pagedaemon 67691 7584 0 0 3 0x14200 bored viomb 22450 111648 0 0 3 0x40014200 acpi0 acpi0 5119 239409 0 0 3 0x40014200 idle1 30380 291798 0 0 3 0x14200 bored softnet3 75567 335245 0 0 3 0x14200 bored softnet2 62536 199309 0 0 3 0x14200 bored softnet1 10678 229051 0 0 2 0x14200 softnet0 78801 492687 0 0 3 0x14200 bored systqmp 88014 66472 0 0 3 0x14200 bored systq 76937 439865 0 0 3 0x14200 tmoslp softclockmp 35732 173454 0 0 3 0x40014200 tmoslp softclock 70335 160350 0 0 3 0x40014200 idle0 1 382890 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 27389 (syz-executor) thread 0xffff8000371d4538 (240496) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8362f4e0) #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 biowait+0xc1 sys/kern/vfs_bio.c:1254 #5 bwrite+0x2e2 sys/kern/vfs_bio.c:766 #6 ufs_dirremove+0x2a9 sys/ufs/ufs/ufs_lookup.c:919 #7 ufs_rmdir+0x287 sys/ufs/ufs/ufs_vnops.c:1248 #8 VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 #9 dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ce92b48) #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 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8063470700) #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 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 10162K 10550K 166960K 12202 0 pcb 17 16K 18K 166960K 183 0 rtable 219 6K 7K 166960K 1270 0 pf 35 17K 18K 166960K 120 0 ifaddr 42 7K 8K 166960K 171 0 ifgroup 55 2K 2K 166960K 189 0 counters 64 36K 36K 166960K 132 0 ioctlops 0 0K 4K 166960K 1542 0 iov 0 0K 16K 166960K 18 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1475 93K 93K 166960K 2280 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 16 3K 4K 166960K 24 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 16 57K 93K 166960K 950 0 sigio 0 0K 0K 166960K 42 0 proc 72 91K 128K 166960K 1377 0 subproc 104 6K 7K 166960K 483 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 56 0 in_multi 96 7K 7K 166960K 432 0 ether_multi 1 0K 0K 166960K 3 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 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 800 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 215 72K 109K 166960K 8710 0 UVM aobj 10 2K 2K 166960K 10 0 pinsyscall 41 82K 106K 166960K 2793 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 12 0K 2K 166960K 120 0 temp 48 6817K 6884K 166960K 19128 0 kqueue 13 20K 30K 166960K 77 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 120 191 0 187 3 2 1 3 0 8 0 rtentry 112 444 0 343 4 1 3 4 0 8 0 unpcb 144 536 0 519 9 8 1 6 0 8 0 syncache 336 6 0 6 4 3 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 808 98 0 92 2 1 1 2 0 8 0 arp 120 79 0 61 1 0 1 1 0 8 0 inpcb 336 873 0 860 17 13 4 10 0 8 2 nd6 136 114 0 90 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 37 0 29 1 0 1 1 0 8 0 ppxss 1168 3 0 3 2 2 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 3 1 0 1 1 0 482 0 pffrnode 88 5 0 3 1 0 1 1 0 8 0 pffrent 40 48 0 46 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 pfstitem 24 73 0 56 1 0 1 1 0 8 0 pfstkey 128 77 0 60 1 0 1 1 0 8 0 pfstate 376 75 0 58 5 2 3 4 0 8 0 pfrule 1344 24 0 19 2 0 2 2 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1758 0 1343 30 4 26 30 0 8 0 art_table 32 1759 0 1343 4 0 4 4 0 8 0 art_node 16 441 0 352 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 1 0 1 1 0 8 0 semapl 112 16 0 2 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2275 0 710 98 0 98 98 0 8 0 ffsino 272 2275 0 710 105 0 105 105 0 8 0 nchpl 144 3030 0 1305 65 0 65 65 0 8 0 uvmvnodes 80 3174 0 0 65 0 65 65 0 8 0 vnodes 216 3174 0 0 177 0 177 177 0 8 0 namei 1024 13055 0 13055 4 3 1 2 0 8 1 percpumem 16 80 0 34 1 0 1 1 0 8 0 kstatmem 264 92 0 68 2 0 2 2 0 8 0 scxspl 216 21211 0 21211 10 9 1 8 1 8 1 plimitpl 152 290 0 271 1 0 1 1 0 8 0 sigapl 424 1198 0 1149 8 1 7 7 0 8 0 futexpl 64 5984 0 5981 4 3 1 1 0 8 0 knotepl 120 347 0 0 11 0 11 11 0 8 0 kqueuepl 216 111 0 101 1 0 1 1 0 8 0 pipepl 320 227 0 200 3 0 3 3 0 8 0 fdescpl 496 1177 0 1147 7 2 5 5 0 8 0 filepl 152 5929 0 5614 27 12 15 18 0 8 2 lockfpl 104 582 0 580 3 1 2 2 0 8 1 lockfspl 48 194 0 192 1 0 1 1 0 8 0 sessionpl 144 53 0 44 1 0 1 1 0 8 0 pgrppl 48 93 0 76 1 0 1 1 0 8 0 ucredpl 104 763 0 750 1 0 1 1 0 8 0 zombiepl 144 1149 0 1149 1 0 1 1 0 8 1 processpl 1160 1198 0 1149 5 1 4 5 0 8 0 procpl 648 1878 0 1822 6 0 6 6 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sockpl 664 1607 0 1573 31 25 6 17 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 246 0 0 31 0 31 31 0 8 0 mtagpl 96 75 0 0 2 0 2 2 0 8 0 mbufpl 256 485 0 0 27 0 27 27 0 8 0 bufpl 280 7544 0 1370 442 0 442 442 0 8 0 anonpl 24 275413 0 272030 85 21 64 77 0 185 26 amapchunkpl 152 28917 0 28490 50 19 31 40 0 158 8 amappl16 200 6189 0 6173 27 25 2 14 0 8 0 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 179 0 167 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 2298 0 2269 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 18 0 18 1 1 0 1 0 8 0 amappl9 144 159 0 159 1 1 0 1 0 8 0 amappl8 136 25 0 21 1 0 1 1 0 8 0 amappl7 128 192 0 180 1 0 1 1 0 8 0 amappl6 120 461 0 460 1 0 1 1 0 8 0 amappl5 112 254 0 243 1 0 1 1 0 8 0 amappl4 104 405 0 385 1 0 1 1 0 8 0 amappl3 96 5209 0 5112 4 0 4 4 0 8 0 amappl2 88 1104 0 1035 2 0 2 2 0 8 0 amappl1 80 12193 0 11635 18 4 14 15 0 8 1 amappl 88 8067 0 7914 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 dma512 512 1 0 1 1 1 0 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 8 0 8 3 2 1 1 0 8 1 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1177 0 1147 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1177 0 1147 1 0 1 1 0 8 0 vmmpekpl 168 10710 0 10650 4 0 4 4 0 8 0 vmmpepl 168 81266 0 79500 105 17 88 94 0 357 5 vmsppl 440 1176 0 1147 6 2 4 5 0 8 0 rwobjpl 56 30518 0 26444 58 0 58 58 0 8 0 pdppl 4096 2361 0 2294 137 64 73 85 0 8 6 pvpl 32 44124 0 0 357 1 356 356 0 265 0 pmappl 248 1176 0 1147 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 469 0 93 11 0 11 11 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:154 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7e6609fd6d10, count: 9 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:154 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7e6609fd6d10, count: -6 ddb{0}> machine ddbcpu 1 Stopped at memcpy+0x19: repe movsq (%rsi),%es:(%rdi) memcpy() at memcpy+0x19 ffs_truncate(fffffd806ce92ab0,0,4,fffffd807f7d3680) at ffs_truncate+0xcb6 ufs_rmdir(ffff80002a0c0c78) at ufs_rmdir+0x374 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd8073d36510,fffffd806c9dce90,ffff80002a0c0d58) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000371d4538,ffffff9c,76b0c6470bc0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885 syscall(ffff80002a0c0ed0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0c0ed0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0c6470bb0, count: 8 ddb{1}> trace memcpy() at memcpy+0x19 ffs_truncate(fffffd806ce92ab0,0,4,fffffd807f7d3680) at ffs_truncate+0xcb6 ufs_rmdir(ffff80002a0c0c78) at ufs_rmdir+0x374 sys/ufs/ufs/ufs_vnops.c:1265 VOP_RMDIR(fffffd8073d36510,fffffd806c9dce90,ffff80002a0c0d58) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413 dounlinkat(ffff8000371d4538,ffffff9c,76b0c6470bc0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885 syscall(ffff80002a0c0ed0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0c0ed0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0c6470bb0, count: -7