uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e uvmfault_amapcopy sys/uvm/uvm_fault.c:242 [inline] uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e sys/uvm/uvm_fault.c:559 pageflttrap(ffff800022049940,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff800022049940) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b sys_connect(ffff800020eb9890,ffff800022049b08,ffff800022049b50) at sys_connect+0x9b sys/kern/uipc_syscalls.c:360 syscall(ffff800022049bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022049bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48d08ff0690, count: 243 End of stack trace. Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 yield() at yield+0x77 sys/kern/sched_bsd.c:304 pool_get(ffffffff82641ca0,1) at pool_get+0x19c sys/kern/subr_pool.c:588 uvm_mapent_alloc(fffffd806e95a5c8,0) at uvm_mapent_alloc+0x2d2 sys/uvm/uvm_map.c:1751 uvm_map_clip_end(fffffd806e95a5c8,fffffd8068a44bf0,20010000) at uvm_map_clip_end+0x5d sys/uvm/uvm_map.c:4769 amap_copy(fffffd806e95a5c8,fffffd8068a44bf0,2,1,20000000,20000001) at amap_copy+0x53b sys/uvm/uvm_amap.c:530 uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e uvmfault_amapcopy sys/uvm/uvm_fault.c:242 [inline] uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e sys/uvm/uvm_fault.c:559 pageflttrap(ffff800022049940,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff800022049940) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b sys_connect(ffff800020eb9890,ffff800022049b08,ffff800022049b50) at sys_connect+0x9b sys/kern/uipc_syscalls.c:360 syscall(ffff800022049bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022049bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48d08ff0690, count: -14 ddb{0}> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff8000220493c0 rbx 0x2 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800023190000 rax 0xffff8000009d76c0 r8 0xffffffff818ce9cf kprintf+0x16f r9 0x1 r10 0x2 r11 0x83d106fe6bac9e9e r12 0x1 r13 0xfffffd8068a36e80 r14 0xffff800020eb9890 r15 0x3 rip 0xffffffff81395598 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000220493b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=10748 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff800020eb9b00,0xffffffff82664468 process=0xffff800020eb6408 user=0xffff800022044000, vmspace=0xfffffd806e95a5c8 estcpu=22, cpticks=15, pctcpu=0.0 user=0, sys=15, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8143 185329 95146 0 2 0 syz-executor.1 * 8143 10748 95146 0 7 0x4000000 syz-executor.1 59014 211172 91468 0 2 0 syz-executor.0 59014 223728 91468 0 3 0x4000080 fsleep syz-executor.0 59014 104806 91468 0 3 0x4000080 netio syz-executor.0 59014 293900 91468 0 3 0x4000080 fsleep syz-executor.0 59014 77767 91468 0 3 0x4000080 fsleep syz-executor.0 20856 15123 1 0 2 0x100083 getty 36524 311051 0 0 3 0x14280 nfsidl nfsio 76462 407316 0 0 3 0x14280 nfsidl nfsio 28562 316564 0 0 3 0x14280 nfsidl nfsio 57725 66221 0 0 3 0x14280 nfsidl nfsio 51279 232639 0 0 3 0x14280 nfsidl nfsio 76596 476950 0 0 3 0x14280 nfsidl nfsio 40182 371655 0 0 3 0x14280 nfsidl nfsio 24072 88737 0 0 3 0x14280 nfsidl nfsio 48926 290152 0 0 3 0x14280 nfsidl nfsio 3920 249236 0 0 3 0x14280 nfsidl nfsio 60893 361277 0 0 3 0x14280 nfsidl nfsio 12367 420673 0 0 3 0x14280 nfsidl nfsio 98652 112891 0 0 3 0x14280 nfsidl nfsio 86575 249116 0 0 3 0x14280 nfsidl nfsio 32841 470071 0 0 3 0x14280 nfsidl nfsio 11911 349863 0 0 3 0x14280 nfsidl nfsio 20600 335417 0 0 3 0x14280 nfsidl nfsio 36388 412406 0 0 3 0x14280 nfsidl nfsio 88256 357093 0 0 3 0x14280 nfsidl nfsio 77235 300536 0 0 3 0x14280 nfsidl nfsio 95146 43318 65817 0 7 0x482 syz-executor.1 91468 344546 65817 0 2 0x482 syz-executor.0 65817 505516 87421 0 3 0x82 thrsleep syz-fuzzer 65817 442039 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 345212 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 405042 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 282770 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 404431 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 402540 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 511876 87421 0 3 0x4000082 thrsleep syz-fuzzer 65817 311918 87421 0 3 0x4000082 kqread syz-fuzzer 65817 193192 87421 0 3 0x4000082 thrsleep syz-fuzzer 87421 80845 44108 0 3 0x10008a pause ksh 44108 212743 54665 0 3 0x92 select sshd 54665 200923 1 0 3 0x80 select sshd 99346 409178 1331 74 3 0x100092 bpf pflogd 1331 115399 1 0 3 0x80 netio pflogd 50580 224357 29707 73 2 0x100090 syslogd 29707 373998 1 0 3 0x100082 netio syslogd 26781 408616 1 77 3 0x100090 poll dhclient 70416 467524 1 0 3 0x80 poll dhclient 67344 492442 0 0 3 0x14200 bored smr 48045 177873 0 0 2 0x14200 zerothread 20934 367706 0 0 3 0x14200 aiodoned aiodoned 22718 160701 0 0 3 0x14200 syncer update 93727 221621 0 0 3 0x14200 cleaner cleaner 64815 375326 0 0 3 0x14200 reaper reaper 10627 2535 0 0 3 0x14200 pgdaemon pagedaemon 27841 379136 0 0 3 0x14200 bored crynlk 81385 127081 0 0 3 0x14200 bored crypto 36394 258780 0 0 3 0x40014200 acpi0 acpi0 86480 376712 0 0 3 0x40014200 idle1 26057 473731 0 0 3 0x14200 bored softnet 7217 100553 0 0 3 0x14200 bored systqmp 81527 123967 0 0 3 0x14200 bored systq 99680 477460 0 0 2 0x40014200 softclock 28482 191749 0 0 3 0x40014200 idle0 1 136955 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 8143 (syz-executor.1) thread 0xffff800020eb9890 (10748) exclusive rwlock vmmaplk r = 0 (0xfffffd806e95a5e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 vm_map_lock_ln+0x111 sys/uvm/uvm_map.c:5445 #3 uvmfault_lookup+0xbe sys/uvm/uvm_fault.c:1442 #4 uvm_fault+0xbbd uvmfault_amapcopy sys/uvm/uvm_fault.c:232 [inline] #4 uvm_fault+0xbbd sys/uvm/uvm_fault.c:559 #5 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 #6 kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 #7 alltraps_kern_meltdown+0x7b #8 copyin+0x4b #9 sys_connect+0x9b sys/kern/uipc_syscalls.c:360 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 exclusive rwlock netlock r = 0 (0xffffffff824d3ff8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sys_connect+0x6a sys/kern/uipc_syscalls.c:355 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82646428) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9522 6480K 7118K 78643K 11543 0 pcb 13 8K 8K 78643K 45 0 rtable 111 5K 8K 78643K 304 0 ifaddr 70 13K 13K 78643K 101 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1505 0 iov 0 0K 24K 78643K 192 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1459 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 24 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 251 0 sigio 0 0K 0K 78643K 4 0 proc 61 63K 95K 78643K 491 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 14 0 in_multi 33 2K 2K 78643K 52 0 ether_multi 1 0K 0K 78643K 3 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 226 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 131 39K 39K 78643K 1757 0 UVM aobj 13 2K 2K 78643K 13 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 12 0K 0K 78643K 19 0 temp 98 3035K 3099K 78643K 2991 0 kqueue 3 4K 8K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 32 0 30 1 0 1 1 0 8 0 rtentry 112 51 0 10 2 0 2 2 0 8 0 unpcb 120 153 0 135 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 17 0 17 1 1 0 1 0 8 0 tcpcb 544 77 0 73 1 0 1 1 0 8 0 inpcb 280 227 0 219 3 2 1 2 0 8 0 nd6 48 9 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 25 0 22 1 0 1 1 0 8 0 pfstitem 24 19 0 8 1 0 1 1 0 8 0 pfstkey 112 19 0 8 1 0 1 1 0 8 0 pfstate 328 19 0 8 2 0 2 2 0 8 0 pfrule 1360 28 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 225 0 52 14 1 13 13 0 8 0 art_table 32 226 0 52 2 0 2 2 0 8 0 art_node 16 50 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1734 0 327 89 1 88 89 0 8 0 ffsino 272 1734 0 327 94 0 94 94 0 8 0 nchpl 144 2361 0 743 60 0 60 60 0 8 0 uvmvnodes 72 1983 0 0 37 0 37 37 0 8 0 vnodes 208 1983 0 0 105 0 105 105 0 8 0 namei 1024 6481 0 6481 2 1 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 8 0 6 1 0 1 1 0 8 0 scxspl 192 6292 0 6292 10 9 1 7 0 8 1 plimitpl 152 40 0 32 1 0 1 1 0 8 0 sigapl 424 487 0 435 6 0 6 6 0 8 0 futexpl 56 3685 0 3682 1 0 1 1 0 8 0 knotepl 112 69 0 50 1 0 1 1 0 8 0 kqueuepl 144 43 0 41 1 0 1 1 0 8 0 pipelkpl 48 112 0 102 1 0 1 1 0 8 0 pipepl 120 224 0 205 1 0 1 1 0 8 0 fdescpl 496 452 0 435 3 0 3 3 0 8 0 filepl 152 2673 0 2561 5 0 5 5 0 8 0 lockfpl 104 59 0 58 1 0 1 1 0 8 0 lockfspl 48 21 0 20 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 236 0 227 1 0 1 1 0 8 0 zombiepl 144 435 0 435 2 1 1 1 0 8 1 processpl 984 487 0 435 7 0 7 7 0 8 0 procpl 624 993 0 927 7 1 6 6 0 8 0 sockpl 400 416 0 388 3 0 3 3 0 8 0 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 277 0 0 34 0 34 34 0 8 0 mtagpl 80 135 0 0 3 0 3 3 0 8 0 mbufpl 256 427 0 0 24 0 24 24 0 8 0 bufpl 280 3836 0 134 265 0 265 265 0 8 0 anonpl 16 61137 0 45551 90 27 63 80 0 124 0 amapchunkpl 152 2252 0 2095 8 1 7 8 0 158 0 amappl16 192 2275 0 1443 63 21 42 54 0 8 0 amappl15 184 115 0 111 1 0 1 1 0 8 0 amappl14 176 26 0 21 1 0 1 1 0 8 0 amappl13 168 29 0 26 1 0 1 1 0 8 0 amappl12 160 12 0 9 1 0 1 1 0 8 0 amappl11 152 161 0 144 1 0 1 1 0 8 0 amappl10 144 19 0 12 1 0 1 1 0 8 0 amappl9 136 483 0 480 1 0 1 1 0 8 0 amappl8 128 471 0 433 2 0 2 2 0 8 0 amappl7 120 117 0 107 1 0 1 1 0 8 0 amappl6 112 27 0 21 1 0 1 1 0 8 0 amappl5 104 389 0 369 1 0 1 1 0 8 0 amappl4 96 493 0 465 1 0 1 1 0 8 0 amappl3 88 112 0 105 1 0 1 1 0 8 0 amappl2 80 2766 0 2684 2 0 2 2 0 8 0 amappl1 72 19821 0 19363 23 13 10 18 0 8 0 amappl 80 1227 0 1177 2 0 2 2 0 84 0 dma4096 4096 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 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 64 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 454 0 435 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 454 0 435 1 0 1 1 0 8 0 vmmpekpl 168 7551 0 7512 2 0 2 2 0 8 0 vmmpepl 168 62215 0 60099 124 32 92 107 0 357 0 vmsppl 368 453 0 435 2 0 2 2 0 8 0 pdppl 4096 916 0 872 6 0 6 6 0 8 0 pvpl 32 192016 0 173060 205 49 156 191 0 265 3 pmappl 232 453 0 435 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 289 0 7 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 yield() at yield+0x77 sys/kern/sched_bsd.c:304 pool_get(ffffffff82641ca0,1) at pool_get+0x19c sys/kern/subr_pool.c:588 uvm_mapent_alloc(fffffd806e95a5c8,0) at uvm_mapent_alloc+0x2d2 sys/uvm/uvm_map.c:1751 uvm_map_clip_end(fffffd806e95a5c8,fffffd8068a44bf0,20010000) at uvm_map_clip_end+0x5d sys/uvm/uvm_map.c:4769 amap_copy(fffffd806e95a5c8,fffffd8068a44bf0,2,1,20000000,20000001) at amap_copy+0x53b sys/uvm/uvm_amap.c:530 uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e uvmfault_amapcopy sys/uvm/uvm_fault.c:242 [inline] uvm_fault(fffffd806e95a5c8,20000000,0,1) at uvm_fault+0xc3e sys/uvm/uvm_fault.c:559 pageflttrap(ffff800022049940,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff800022049940) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b sys_connect(ffff800020eb9890,ffff800022049b08,ffff800022049b50) at sys_connect+0x9b sys/kern/uipc_syscalls.c:360 syscall(ffff800022049bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022049bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48d08ff0690, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82646220) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82646220) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82646220,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff8000219899d0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff8000219899d0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff8000219899d0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff826405d8,120,ffffffff821f3601,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e6cea8,ffff800021989b00,ffff800021989b50) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800021989bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021989bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6310, count: -12