*cpu0: uvm_fault(0xffffffff836190a8, 0xffff800013cc3300, 0, 2) -> d ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f3437440960, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a130550 rbx 0 rdx 0 rcx 0xffff8000ffff4028 rax 0x2a r8 0xffff80002a130480 r9 0x4 r10 0xae5c50336b2333f1 r11 0xa9a439229a9a490f r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8231e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a1304d0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (sh) tid=154773 pid=9424 tcnt=1 stat=onproc flags process=100000 proc=0 runpri=83, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff47c0,0xffffffff834fd8e0 process=0xffff800033997680 user=0xffff80002a12b000, vmspace=0xfffffd806bdf0008 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 9424 154773 8968 0 7 0x100000 sh 67676 396472 79607 0 2 0x100002 sh 8968 310076 39216 0 3 0x10008a sigsusp sh 53727 343753 92859 0 2 0x2 sh 78393 26387 2858 0 2 0 syz-executor 78393 265069 2858 0 3 0x4000080 fsleep syz-executor 70122 332040 78922 0 2 0x100000 sh 78922 333688 84712 0 3 0x10008a sigsusp sh 84712 103662 74751 0 3 0x82 wait syz-executor 39216 514089 74751 0 3 0x82 wait syz-executor 92859 31060 74751 0 3 0x82 wait syz-executor 79607 199886 74751 0 3 0x82 wait syz-executor 69896 191516 74751 0 3 0x82 piperd syz-executor 56237 69963 74751 0 3 0x82 piperd syz-executor 2858 442187 74751 0 2 0x482 syz-executor 88640 520413 74751 0 3 0x82 piperd syz-executor 73818 223445 0 0 3 0x14200 acct acct 49496 81807 0 0 3 0x14200 bored sosplice 74751 463632 36839 0 2 0x2 syz-executor 36839 78145 91300 0 3 0x10008a sigsusp ksh 91300 353854 45475 0 3 0x98 kqread sshd-session 45475 232976 34220 0 3 0x92 kqread sshd-session 24891 342613 1 0 3 0x100083 ttyin getty 34220 73668 1 0 3 0x88 kqread sshd 16701 482767 23292 74 3 0x1100092 bpf pflogd 23292 310036 1 0 3 0x80 sbwait pflogd 38718 113125 64791 73 7 0x1100010 syslogd 64791 113794 1 0 3 0x100082 sbwait syslogd 51067 344054 1 0 3 0x100080 kqread resolvd 63830 431555 23842 77 3 0x100092 kqread dhcpleased 36849 381133 23842 77 3 0x100092 kqread dhcpleased 23842 153709 1 0 3 0x80 kqread dhcpleased 66998 478583 0 0 3 0x14200 bored smr 27312 280720 0 0 2 0x14200 zerothread 36338 158113 0 0 3 0x14200 aiodoned aiodoned 44082 503320 0 0 3 0x14200 syncer update 79668 425769 0 0 3 0x14200 cleaner cleaner 83288 155519 0 0 3 0x14200 reaper reaper 50414 446228 0 0 3 0x14200 pgdaemon pagedaemon 69032 176709 0 0 3 0x14200 bored viomb 84268 357220 0 0 3 0x40014200 acpi0 acpi0 8985 141055 0 0 3 0x40014200 idle1 99264 240158 0 0 3 0x14200 bored softnet3 71815 304259 0 0 3 0x14200 bored softnet2 68876 376879 0 0 3 0x14200 bored softnet1 50614 200699 0 0 3 0x14200 bored softnet0 67984 103997 0 0 3 0x14200 bored systqmp 96700 424139 0 0 3 0x14200 bored systq 68586 249593 0 0 3 0x14200 tmoslp softclockmp 77627 420789 0 0 3 0x40014200 tmoslp softclock 79131 230771 0 0 3 0x40014200 idle0 1 102468 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80715887d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:432 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2791 #4 uvm_fault_lower_lookup+0x33c sys/uvm/uvm_fault.c:1192 #5 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #6 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 9424 (sh) thread 0xffff8000ffff4028 (154773) exclusive rwlock uobjlk r = 0 (0xfffffd807ec260f0) #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 uvm_fault_lower_lookup+0x54 sys/uvm/uvm_fault.c:1126 #3 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #4 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bdf00f8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80715887d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:432 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2791 #4 uvm_fault_lower_lookup+0x33c sys/uvm/uvm_fault.c:1192 #5 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #6 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 38718 (syslogd) thread 0xffff8000ffffcf40 (113125) 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 vwaitforio+0xd2 #5 ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482 #6 VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 #7 sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 #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 exclusive rrwlock inode r = 0 (0xfffffd806e4d40a0) #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 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 10101K 10367K 166960K 11987 0 pcb 17 13K 14K 166960K 137 0 rtable 155 4K 7K 166960K 1503 0 pf 30 16K 25K 166960K 140 0 ifaddr 30 5K 8K 166960K 198 0 ifgroup 47 2K 2K 166960K 217 0 counters 60 35K 36K 166960K 146 0 ioctlops 0 0K 4K 166960K 1557 0 iov 0 0K 24K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1462 92K 92K 166960K 2401 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 20 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 1173 0 sigio 0 0K 0K 166960K 8 0 proc 72 91K 140K 166960K 1583 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 74 0 in_multi 56 4K 7K 166960K 503 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 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 884 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 195 72K 87K 166960K 10302 0 UVM aobj 15 2K 2K 166960K 17 0 pinsyscall 42 84K 104K 166960K 3204 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 16 0K 1K 166960K 140 0 temp 50 6818K 6883K 166960K 20958 0 kqueue 13 20K 33K 166960K 94 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 120 143 0 140 1 0 1 1 0 8 0 rtentry 112 519 0 450 5 1 4 4 0 8 1 unpcb 144 413 0 396 4 3 1 2 0 8 0 syncache 336 7 0 7 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 182 0 178 6 5 1 4 0 8 0 arp 120 94 0 83 1 0 1 1 0 8 0 inpcb 336 1052 0 1043 20 15 5 7 0 8 4 nd6 136 131 0 119 1 0 1 1 0 8 0 pkpcb 40 3 0 3 3 3 0 1 0 8 0 kcovpl 48 47 0 39 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 0 2 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 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstitem 24 76 0 45 1 0 1 1 0 8 0 pfstkey 128 76 0 45 2 0 2 2 0 8 0 pfstate 376 76 0 45 4 0 4 4 0 8 0 pfrule 1344 26 0 19 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2045 0 1762 33 3 30 30 0 8 7 art_table 32 2046 0 1762 4 0 4 4 0 8 1 art_node 16 517 0 454 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 14 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2509 0 930 99 0 99 99 0 8 0 ffsino 272 2509 0 930 106 0 106 106 0 8 0 nchpl 144 3382 0 1657 64 0 64 64 0 8 0 uvmvnodes 80 3479 0 0 71 0 71 71 0 8 0 vnodes 216 3479 0 0 194 0 194 194 0 8 0 namei 1024 14968 0 14968 3 2 1 2 0 8 1 percpumem 16 87 0 43 1 0 1 1 0 8 0 kstatmem 264 106 0 86 2 0 2 2 0 8 0 scxspl 216 25844 0 25844 12 11 1 8 1 8 1 plimitpl 152 221 0 204 1 0 1 1 0 8 0 sigapl 424 1402 0 1351 9 3 6 7 0 8 0 futexpl 64 7877 0 7876 2 1 1 1 0 8 0 knotepl 120 357 0 0 10 0 10 10 0 8 0 kqueuepl 216 176 0 167 3 2 1 3 0 8 0 pipepl 320 464 0 437 10 7 3 8 0 8 0 fdescpl 496 1380 0 1349 6 2 4 5 0 8 0 filepl 152 7135 0 6894 28 16 12 16 0 8 2 lockfpl 104 250 0 248 1 0 1 1 0 8 0 lockfspl 48 121 0 119 1 0 1 1 0 8 0 sessionpl 144 65 0 56 1 0 1 1 0 8 0 pgrppl 48 116 0 99 1 0 1 1 0 8 0 ucredpl 104 834 0 820 1 0 1 1 0 8 0 zombiepl 144 1351 0 1351 1 0 1 1 0 8 1 processpl 1160 1402 0 1351 5 1 4 5 0 8 0 procpl 648 2226 0 2174 7 1 6 6 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 664 1616 0 1587 22 15 7 9 0 8 4 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 225 0 0 29 1 28 29 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 418 0 0 23 0 23 23 0 8 0 bufpl 280 7512 0 1020 464 0 464 464 0 8 0 anonpl 24 266596 0 263444 57 6 51 51 0 185 17 amapchunkpl 152 33481 0 33124 39 7 32 33 0 158 17 amappl16 200 5636 0 5633 25 23 2 14 0 8 1 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 195 0 183 1 0 1 1 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 2594 0 2561 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 19 0 19 2 2 0 1 0 8 0 amappl9 144 133 0 133 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 180 0 168 1 0 1 1 0 8 0 amappl6 120 544 0 538 1 0 1 1 0 8 0 amappl5 112 280 0 268 1 0 1 1 0 8 0 amappl4 104 431 0 410 1 0 1 1 0 8 0 amappl3 96 6233 0 6156 7 3 4 4 0 8 1 amappl2 88 1241 0 1169 2 0 2 2 0 8 0 amappl1 80 13734 0 13170 16 2 14 15 0 8 1 amappl 88 9608 0 9476 6 1 5 5 0 92 0 dma16384 16384 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 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 16 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1380 0 1349 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1380 0 1349 1 0 1 1 0 8 0 vmmpekpl 168 13708 0 13654 4 0 4 4 0 8 0 vmmpepl 168 93245 0 91616 107 22 85 93 0 357 5 vmsppl 440 1379 0 1349 6 2 4 5 0 8 0 rwobjpl 56 33417 0 29038 64 2 62 62 0 8 0 pdppl 4096 2767 0 2698 139 70 69 85 0 8 0 pvpl 32 27559 0 0 223 0 223 223 0 265 0 pmappl 248 1379 0 1349 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 475 0 104 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 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+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,66) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83092a1a) at db_printf+0x9b fault(ffffffff8303c395) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a06a550,ffff800013cc3300) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a06a550) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a06a670, count: 0 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 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+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,66) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83092a1a) at db_printf+0x9b fault(ffffffff8303c395) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a06a550,ffff800013cc3300) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a06a550) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x19 VOP_FSYNC(fffffd806e285128,fffffd807f7d3c30,1,ffff8000ffffcf40) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffcf40,ffff80002a06a830,ffff80002a06a780) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06a830) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a830) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a3f48015e40, count: -19 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f3437440960, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f3437440960, count: -1