*cpu1: uvm_fault(0xfffffd806bedf798, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x31e74dd7180, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2fa530 rbx 0 rdx 0xffff8000015016c0 rcx 0xffff80002a3bb230 rax 0x3c r8 0xffff80002a2fa460 r9 0 r10 0x574d729a072326b0 r11 0x9958155547bded6f r12 0 r13 0 r14 0xffff80002a3bb230 r15 0 rip 0xffffffff81cfd3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2fa4b0 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=60646 pid=85765 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a3ba040,0xffff80002a3bafb0 process=0xffff8000fffe9300 user=0xffff80002a2f5000, vmspace=0xfffffd806bcb0d40 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9197 314792 64344 0 3 0x80 nanoslp syz-executor 9197 445054 64344 0 3 0x4000080 fsleep syz-executor 9197 335119 64344 0 3 0x4000080 fsleep syz-executor 85368 9301 2352 0 2 0x100002 sh 68051 393966 86742 0 2 0 syz-executor 68051 359628 86742 0 3 0x4000080 bell syz-executor 68051 172530 86742 0 3 0x4000080 fsleep syz-executor 68051 77898 86742 0 3 0x4000080 fsleep syz-executor 65352 26895 62538 0 2 0 syz-executor 65352 458473 62538 0 3 0x4000080 fsleep syz-executor 65352 244462 62538 0 3 0x4000080 fsleep syz-executor 85765 348000 97068 0 2 0 syz-executor *85765 60646 97068 0 7 0x4000000 syz-executor 85765 265390 97068 0 3 0x4000080 fsleep syz-executor 6897 12025 4090 0 2 0 syz-executor 6897 3836 4090 0 3 0x4000080 fsleep syz-executor 87823 266397 72861 0 2 0 syz-executor 87823 433315 72861 0 3 0x4000080 fsleep syz-executor 2352 193329 74234 0 3 0x82 wait syz-executor 3584 403687 0 0 3 0x14200 acct acct 97068 49492 74234 0 3 0x82 nanoslp syz-executor 64344 178207 74234 0 3 0x82 nanoslp syz-executor 62538 199533 74234 0 3 0x82 nanoslp syz-executor 8468 18453 0 0 3 0x14280 nfsidl nfsio 23474 238282 0 0 3 0x14280 nfsidl nfsio 58290 198916 0 0 3 0x14280 nfsidl nfsio 13525 473045 0 0 3 0x14280 nfsidl nfsio 69487 396466 0 0 3 0x14280 nfsidl nfsio 41044 450624 0 0 3 0x14280 nfsidl nfsio 91116 237602 0 0 3 0x14280 nfsidl nfsio 68275 253054 0 0 3 0x14280 nfsidl nfsio 74312 521099 0 0 3 0x14280 nfsidl nfsio 81223 478748 0 0 3 0x14280 nfsidl nfsio 58088 18601 0 0 3 0x14280 nfsidl nfsio 16699 32154 0 0 3 0x14280 nfsidl nfsio 14802 39930 0 0 3 0x14280 nfsidl nfsio 71269 136724 0 0 3 0x14280 nfsidl nfsio 33964 88 0 0 3 0x14280 nfsidl nfsio 17881 440575 0 0 3 0x14280 nfsidl nfsio 31074 358410 0 0 3 0x14280 nfsidl nfsio 94645 179948 0 0 3 0x14280 nfsidl nfsio 15046 113453 0 0 3 0x14280 nfsidl nfsio 61256 52356 0 0 3 0x14280 nfsidl nfsio 60125 296114 1 0 3 0x100083 ttyin getty 96279 455666 0 0 3 0x14200 bored sosplice 53059 56348 13322 0 3 0x100082 sbwait arp 13322 153059 1 0 3 0x10008a sigsusp sh 31642 477254 74234 0 3 0x82 nanoslp syz-executor 4090 183874 74234 0 3 0x82 nanoslp syz-executor 86742 326791 74234 0 3 0x82 nanoslp syz-executor 72861 244754 74234 0 3 0x82 nanoslp syz-executor 74234 23470 19030 0 3 0x82 kqread syz-executor 19030 137259 60483 0 3 0x10008a sigsusp ksh 60483 372712 84865 0 3 0x98 kqread sshd-session 84865 275268 70271 0 3 0x92 kqread sshd-session 70271 406335 1 0 3 0x88 kqread sshd 88046 182982 38930 74 3 0x1100092 bpf pflogd 38930 135337 1 0 3 0x80 sbwait pflogd 75376 464054 87917 73 3 0x1100090 kqread syslogd 87917 20157 1 0 3 0x100082 sbwait syslogd 41689 381759 1 0 3 0x100080 kqread resolvd 14644 32982 68911 77 3 0x100092 kqread dhcpleased 21078 77967 68911 77 3 0x100092 kqread dhcpleased 68911 99414 1 0 3 0x80 kqread dhcpleased 61403 62493 0 0 3 0x14200 bored smr 61201 42332 0 0 2 0x14200 zerothread 44034 357174 0 0 3 0x14200 aiodoned aiodoned 51526 459152 0 0 3 0x14200 syncer update 36971 132190 0 0 3 0x14200 cleaner cleaner 81878 272433 0 0 3 0x14200 reaper reaper 3786 369005 0 0 3 0x14200 pgdaemon pagedaemon 24584 482044 0 0 3 0x14200 bored viomb 69130 32298 0 0 3 0x40014200 acpi0 acpi0 20564 405913 0 0 3 0x40014200 idle1 5989 426359 0 0 3 0x14200 bored softnet3 32855 160261 0 0 3 0x14200 bored softnet2 6745 194262 0 0 3 0x14200 bored softnet1 22585 309000 0 0 3 0x14200 bored softnet0 18180 263844 0 0 3 0x14200 bored systqmp 51383 68841 0 0 3 0x14200 bored systq 56552 327200 0 0 3 0x14200 tmoslp softclockmp 53095 69017 0 0 3 0x40014200 tmoslp softclock 55158 73735 0 0 3 0x40014200 idle0 1 378606 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff839d9650) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 futex_wake+0x28a futex_list_wakeup sys/kern/sys_futex.c:343 [inline] #3 futex_wake+0x28a sys/kern/sys_futex.c:479 #4 sys_futex+0x223 sys/kern/sys_futex.c:155 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #6 Xsyscall+0x128 Process 85765 (syz-executor) thread 0xffff80002a3bb4c0 (348000) exclusive rwlock futexlk r = 0 (0xffffffff838c4be8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 futex_wake+0xc0 sys/kern/sys_futex.c:464 #3 sys_futex+0x223 sys/kern/sys_futex.c:155 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 11168K 12351K 166960K 13899 0 pcb 17 15K 16K 166960K 392 0 rtable 159 12K 13K 166960K 792 0 pf 38 18K 83K 166960K 201 0 ifaddr 31 4K 7K 166960K 118 0 ifgroup 55 2K 3K 166960K 216 0 sysctl 4 1K 3K 166960K 8 0 counters 64 36K 37K 166960K 230 0 ioctlops 0 0K 4K 166960K 1923 0 iov 0 0K 16K 166960K 66 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1535 97K 97K 166960K 3295 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 65 0 dirhash 15 2K 3K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 114K 166960K 1587 0 sigio 0 0K 0K 166960K 56 0 proc 72 91K 140K 166960K 817 0 subproc 81 5K 5K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 288 0 in_multi 45 3K 6K 166960K 173 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 175 784K 784K 166960K 175 0 exec 0 0K 1K 166960K 744 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 265 165K 174K 166960K 16403 0 UVM aobj 43 2K 4K 166960K 47 0 pinsyscall 46 92K 106K 166960K 2769 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 98 0 NDP 14 0K 1K 166960K 85 0 temp 77 8664K 8918K 166960K 56757 0 kqueue 13 20K 32K 166960K 272 0 SYN cache 2 10K 18K 166960K 3 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 120 224 0 219 4 3 1 3 0 8 0 rtentry 176 200 0 144 5 0 5 5 0 8 0 unpcb 144 1321 0 1301 13 12 1 6 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 612 0 606 17 13 4 8 0 8 3 arp 128 30 0 15 1 0 1 1 0 8 0 inpcb 384 1922 0 1911 25 19 6 12 0 8 4 nd6 144 34 0 26 1 0 1 1 0 8 0 pkpcb 40 86 0 86 3 2 1 1 0 8 1 kcovpl 48 12 0 3 1 0 1 1 0 8 0 ppxss 1192 62 0 62 2 1 1 1 0 8 1 pppxif 1504 7 0 7 4 4 0 1 0 8 0 pffrag 232 6 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 9 0 3 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 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 3 0 3 1 1 0 1 0 8 0 pfstitem 24 82 0 31 1 0 1 1 0 8 0 pfstkey 128 82 0 31 2 0 2 2 0 8 0 pfstate 384 81 0 31 6 0 6 6 0 8 0 pfrule 1344 27 0 20 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 680 0 448 26 6 20 26 0 8 3 art_table 32 684 0 448 4 0 4 4 0 8 0 art_node 16 166 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 13 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 60 0 50 1 0 1 1 0 8 0 shmpl 112 44 0 4 2 0 2 2 0 8 0 dirhash 1024 39 0 20 3 0 3 3 0 8 0 dino2pl 256 4458 0 2943 95 0 95 95 0 8 0 ffsino 288 4458 0 2943 109 0 109 109 0 8 0 nchpl 144 6692 0 6149 63 39 24 63 0 8 0 rtmask 32 17 0 17 3 2 1 1 0 8 1 uvmvnodes 80 2364 0 0 49 0 49 49 0 8 0 vnodes 216 2364 0 0 132 0 132 132 0 8 0 namei 1024 24459 0 24459 2 1 1 2 0 8 1 percpumem 16 130 0 83 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 126 0 102 3 0 3 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 18940 0 18940 11 10 1 8 1 8 1 plimitpl 152 339 0 321 1 0 1 1 0 8 0 sigapl 424 1899 0 1825 10 1 9 9 0 8 0 knotepl 120 571 0 0 17 0 17 17 0 8 0 kqueuepl 224 655 0 646 15 10 5 5 0 8 4 pipepl 336 265 0 234 3 0 3 3 0 8 0 fdescpl 520 1856 0 1822 3 0 3 3 0 8 0 filepl 160 13604 0 13359 25 11 14 18 0 8 1 lockfpl 104 603 0 601 3 1 2 2 0 8 1 lockfspl 48 235 0 233 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 89 0 71 1 0 1 1 0 8 0 ucredpl 104 2598 0 2584 1 0 1 1 0 8 0 zombiepl 144 2189 0 2188 1 0 1 1 0 8 0 processpl 1208 1900 0 1825 6 0 6 6 0 8 0 procpl 656 4396 0 4310 9 1 8 8 0 8 0 srpgc 96 12 0 12 4 4 0 1 0 8 0 sosppl 168 8 0 8 4 3 1 1 0 8 1 sockpl 728 3585 0 3549 44 36 8 18 0 8 4 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 48 0 0 4 0 4 4 0 8 0 mtagpl 96 178 0 0 4 0 4 4 0 8 0 mbufpl 256 3702 0 0 231 0 231 231 0 8 0 bufpl 280 5012 0 134 349 0 349 349 0 8 0 anonpl 32 9675 0 0 78 0 78 78 0 246 0 amapchunkpl 152 53160 0 52544 38 9 29 29 0 158 4 amappl16 200 4408 0 4339 38 31 7 17 0 8 0 amappl15 192 36 0 36 1 1 0 1 0 8 0 amappl14 184 128 0 114 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 2558 0 2522 4 1 3 3 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 9 0 7 1 0 1 1 0 8 0 amappl9 144 241 0 241 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 112 0 99 1 0 1 1 0 8 0 amappl6 120 231 0 225 1 0 1 1 0 8 0 amappl5 112 143 0 133 1 0 1 1 0 8 0 amappl4 104 377 0 356 1 0 1 1 0 8 0 amappl3 96 11033 0 10914 4 0 4 4 0 8 0 amappl2 88 710 0 640 2 0 2 2 0 8 0 amappl1 80 15037 0 14400 15 0 15 15 0 8 0 amappl 88 15370 0 15186 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 8 0 8 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 8 0 8 3 3 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 46 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1856 0 1822 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1856 0 1822 1 0 1 1 0 8 0 vmmpekpl 168 15951 0 15894 3 0 3 3 0 8 0 vmmpepl 168 119664 0 117491 109 11 98 103 0 357 1 vmsppl 480 1855 0 1822 5 0 5 5 0 8 0 rwobjpl 72 33533 0 30080 69 5 64 67 0 8 0 pdppl 4096 3719 0 3644 117 40 77 87 0 8 2 pvpl 32 17930 0 0 146 1 145 145 0 265 0 pmappl 256 1855 0 1822 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 641 0 68 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x31e74dd7180, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,67) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(67) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(67) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8337d801) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800035ff21b0) at db_ktrap+0x169 db_printtrap sys/arch/amd64/amd64/db_interface.c:102 [inline] db_ktrap(6,0,ffff800035ff21b0) at db_ktrap+0x169 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff800035ff21b0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001622000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 end trace frame: 0xffff800035ff22e0, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,67) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(67) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(67) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8337d801) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800035ff21b0) at db_ktrap+0x169 db_printtrap sys/arch/amd64/amd64/db_interface.c:102 [inline] db_ktrap(6,0,ffff800035ff21b0) at db_ktrap+0x169 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff800035ff21b0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001622000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,1,2000,ffff8000ffff0f88) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000ffff0f88) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035ff2360) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806722b600,1,fffffd807f7d35b0,ffff8000ffff0f88) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805eb94280,ffff8000ffff0f88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805eb94280,ffff8000ffff0f88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805eb94280,ffff8000ffff0f88) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd805eb94280,ffff8000ffff0f88) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff0f88) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff0f88,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0f88,ffff800035ff26d0,ffff800035ff2620) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035ff26d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035ff26d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7113fa8f6240, count: -25