login: uvm_fault(0xfffffd806c76e7c0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82c1f038 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c434ab0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82c1f038 Starting stack trace... panic(ffffffff833e18b3) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c434a00) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000162c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff8000fffe94e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000fffe94e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c434bb0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807bb311b0,1,fffffd80097fd7b8,ffff8000fffe94e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c970360,ffff8000fffe94e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c970360,ffff8000fffe94e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c970360,ffff8000fffe94e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c970360,ffff8000fffe94e0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe94e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe94e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe94e0,ffff80003c434f20,ffff80003c434e70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c434f20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c434f20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7aae89f8e460, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1636595584 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 473745 41985 0 0 0x1 0 syz-executor *385503 41985 0 0 0x4000000 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x9f8d5056870, count: 14 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806c76e7c0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9f8d5056870, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3f6ab0 rbx 0 rdx 0xffff800001587f00 rcx 0xffff80002a305790 rax 0x3b r8 0xffff80003c3f69e0 r9 0x1 r10 0x48837d0491c774f7 r11 0xdf0241e42e11a0c1 r12 0 r13 0 r14 0xffff80002a305790 r15 0 rip 0xffffffff819113ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c3f6a30 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=385503 pid=41985 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a304800,0xffffffff8393b6f0 process=0xffff8000fffe4e90 user=0xffff80003c3f1000, vmspace=0xfffffd806c76eb90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26753 498100 76340 -1 2 0x10 syz-executor 26753 449331 76340 -1 3 0x4000090 fsleep syz-executor 26753 332711 76340 -1 3 0x4000090 fsleep syz-executor 89105 318117 48431 0 3 0x80 nanoslp syz-executor 89105 383571 48431 0 3 0x4000080 rest syz-executor 89105 194573 48431 0 3 0x4000080 fsleep syz-executor 41985 473745 49921 0 7 0x1 syz-executor 41985 59746 49921 0 3 0x4000080 kqsel syz-executor *41985 385503 49921 0 7 0x4000000 syz-executor 48431 301143 67764 0 3 0x82 nanoslp syz-executor 72945 365699 1 0 3 0x100083 ttyin getty 37886 92138 0 0 3 0x14200 acct acct 78654 412792 67764 0 3 0x82 nanoslp syz-executor 46804 45930 0 0 3 0x14280 nfsidl nfsio 64783 265407 0 0 3 0x14280 nfsidl nfsio 67435 131023 0 0 3 0x14280 nfsidl nfsio 79625 391970 0 0 3 0x14280 nfsidl nfsio 11346 261349 0 0 3 0x14280 nfsidl nfsio 52809 221622 0 0 3 0x14280 nfsidl nfsio 42307 76347 0 0 3 0x14280 nfsidl nfsio 79636 15225 0 0 3 0x14280 nfsidl nfsio 485 374789 0 0 3 0x14280 nfsidl nfsio 87064 160842 0 0 3 0x14280 nfsidl nfsio 85285 515527 0 0 3 0x14280 nfsidl nfsio 54793 436897 0 0 3 0x14280 nfsidl nfsio 66267 243814 0 0 3 0x14280 nfsidl nfsio 97016 12962 0 0 3 0x14280 nfsidl nfsio 28581 385471 0 0 3 0x14280 nfsidl nfsio 30784 519165 0 0 3 0x14280 nfsidl nfsio 36728 486096 0 0 3 0x14280 nfsidl nfsio 79530 316121 0 0 3 0x14280 nfsidl nfsio 69127 486636 0 0 3 0x14280 nfsidl nfsio 95345 479979 0 0 3 0x14280 nfsidl nfsio 74978 44395 67764 0 3 0x82 nanoslp syz-executor 76340 125627 67764 0 3 0x82 nanoslp syz-executor 55020 147651 67764 0 3 0x82 wait syz-executor 52307 240074 67764 0 3 0x82 nanoslp syz-executor 49921 331644 67764 0 3 0x82 nanoslp syz-executor 54842 431189 67764 0 3 0x82 nanoslp syz-executor 67764 317479 18074 0 3 0x82 kqread syz-executor 18074 339024 26229 0 3 0x10008a sigsusp ksh 26229 298577 14994 0 3 0x98 kqread sshd-session 14994 142632 45472 0 3 0x92 kqread sshd-session 45472 309191 1 0 3 0x88 kqread sshd 2052 482458 38855 74 3 0x1100092 bpf pflogd 38855 511673 1 0 3 0x80 sbwait pflogd 72413 507390 74230 73 3 0x1100090 kqread syslogd 74230 467321 1 0 3 0x100082 sbwait syslogd 83935 351933 1 0 3 0x100080 kqread resolvd 82942 297950 62432 77 3 0x100092 kqread dhcpleased 21288 379525 62432 77 3 0x100092 kqread dhcpleased 62432 2150 1 0 3 0x80 kqread dhcpleased 14661 29153 0 0 3 0x14200 bored smr 57572 152591 0 0 3 0x14200 pgzero zerothread 53314 1075 0 0 3 0x14200 aiodoned aiodoned 83930 146443 0 0 3 0x14200 syncer update 35378 514595 0 0 3 0x14200 cleaner cleaner 57504 491060 0 0 2 0x14200 reaper 54357 473703 0 0 3 0x14200 pgdaemon pagedaemon 514 474443 0 0 3 0x14200 bored viomb 3918 431592 0 0 3 0x40014200 acpi0 acpi0 22797 376376 0 0 3 0x40014200 idle1 78899 186661 0 0 3 0x14200 bored softnet1 96472 271983 0 0 3 0x14200 netlock softnet0 37142 27799 0 0 2 0x40014200 systqmp 50756 395845 0 0 3 0x14200 bored systq 39191 354805 0 0 3 0x14200 tmoslp softclockmp 64236 440863 0 0 3 0x40014200 tmoslp softclock 58099 215350 0 0 3 0x40014200 idle0 1 133728 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11093 12188K 12368K 166960K 12992 0 pcb 19 13K 13K 166960K 143 0 rtable 253 10K 10K 166960K 794 0 pf 46 19K 83K 166960K 134 0 ifaddr 46 8K 8K 166960K 109 0 ifgroup 61 2K 3K 166960K 168 0 sysctl 2 1K 9K 166960K 9 0 counters 82 38K 38K 166960K 244 0 ioctlops 0 0K 4K 166960K 1661 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1404 88K 89K 166960K 2097 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 85 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 775 0 sigio 1 0K 0K 166960K 12 0 proc 72 115K 196K 166960K 698 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 75 0 in_multi 101 7K 7K 166960K 181 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 475 0 fusefs mount 1 32K 32K 166960K 1 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 277 173K 181K 166960K 8713 0 UVM aobj 15 8K 8K 166960K 16 0 pinsyscall 43 86K 104K 166960K 2022 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 58 0 NDP 15 0K 2K 166960K 70 0 temp 118 8674K 8747K 166960K 51779 0 kqueue 14 20K 30K 166960K 175 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 160 0 156 3 2 1 3 0 8 0 rtentry 176 250 0 142 6 0 6 6 0 8 0 unpcb 144 466 0 448 5 3 2 5 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 182 0 172 4 2 2 4 0 8 1 arp 136 31 0 9 1 0 1 1 0 8 0 inpcb 328 695 0 676 8 1 7 7 0 8 5 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 152 37 0 12 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1192 69 0 63 1 0 1 1 0 8 0 pppxif 1504 14 0 14 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 73 0 68 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 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 4 1 0 1 1 0 8 0 pfstate 448 4 0 2 1 0 1 1 0 8 0 pfrule 1360 3 0 1 2 1 1 1 0 8 0 rttmr 136 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 771 0 315 32 3 29 29 0 8 0 art_table 40 775 0 315 5 0 5 5 0 8 0 art_node 32 250 0 155 2 1 1 2 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semapl 112 82 0 72 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2780 0 1262 96 1 95 96 0 8 0 ffsino 296 2780 0 1262 118 0 118 118 0 8 0 nchpl 144 3751 0 2032 64 0 64 64 0 8 0 rtmask 32 4 0 1 1 0 1 1 0 8 0 vnodes 216 3294 0 0 183 0 183 183 0 8 0 namei 1024 13105 0 13105 2 1 1 2 0 8 1 percpumem 16 137 0 81 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 848 4 0 1 2 1 1 1 0 8 0 kstatmem 264 90 0 58 3 0 3 3 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 17526 0 17525 9 7 2 8 1 8 1 plimitpl 152 134 0 112 1 0 1 1 0 8 0 sigapl 424 1101 0 1032 8 0 8 8 0 8 0 knotepl 120 401 0 0 13 0 13 13 0 8 0 kqueuepl 224 329 0 286 5 2 3 3 0 8 0 pipepl 344 207 0 178 3 0 3 3 0 8 0 fdescpl 528 1063 0 1031 3 0 3 3 0 8 0 filepl 160 6337 0 6060 20 7 13 20 0 8 0 lockfpl 104 174 0 172 1 0 1 1 0 8 0 lockfspl 48 76 0 74 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 52 0 35 1 0 1 1 0 8 0 ucredpl 104 906 0 891 1 0 1 1 0 8 0 zombiepl 144 1037 0 1032 1 0 1 1 0 8 0 processpl 1232 1101 0 1032 6 0 6 6 0 8 0 procpl 664 2096 0 2019 8 0 8 8 0 8 0 sosppl 176 4 0 4 2 1 1 1 0 8 1 sockpl 752 1410 0 1368 20 9 11 20 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 107 0 0 14 0 14 14 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1664 0 0 104 0 104 104 0 8 0 bufpl 280 6496 0 360 439 0 439 439 0 8 0 anonpl 32 10331 0 0 84 0 84 84 0 246 0 amapchunkpl 152 27425 0 26781 33 2 31 31 0 158 5 amappl16 200 3519 0 3439 23 5 18 18 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 475 0 474 1 0 1 1 0 8 0 amappl12 168 1457 0 1414 3 0 3 3 0 8 0 amappl11 160 14 0 13 1 0 1 1 0 8 0 amappl10 152 49 0 34 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 93 0 91 1 0 1 1 0 8 0 amappl6 120 432 0 419 1 0 1 1 0 8 0 amappl5 112 91 0 81 1 0 1 1 0 8 0 amappl4 104 452 0 422 1 0 1 1 0 8 0 amappl3 96 4766 0 4664 4 1 3 3 0 8 0 amappl2 88 1183 0 1106 2 0 2 2 0 8 0 amappl1 80 12808 0 12211 15 0 15 15 0 8 1 amappl 88 7814 0 7616 5 0 5 5 0 92 0 uvmvnodes 80 116 0 0 3 0 3 3 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 128 256 0 256 2 1 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 15 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1063 0 1031 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1063 0 1031 1 0 1 1 0 8 0 vmmpekpl 168 10063 0 10014 3 0 3 3 0 8 0 vmmpepl 168 74973 0 72916 103 3 100 100 0 357 3 vmsppl 488 1062 0 1031 5 0 5 5 0 8 0 rwobjpl 80 22515 0 21379 30 1 29 29 0 8 1 pdppl 4096 2142 0 2067 116 41 75 88 0 8 0 pvpl 32 23241 0 0 189 1 188 188 0 265 0 pmappl 256 1066 0 1032 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 52 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83891ff0) 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 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x1a __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff8000333c68b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a3054f8,57,0,ffff8000333c6aa0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a3054f8,57,0,ffff8000333c6aa0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff8000333c6b50) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff8000333c6b50) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 end trace frame: 0xffff8000333c6bd0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83891ff0) 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 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x1a __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff8000333c68b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a190c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a3054f8,57,0,ffff8000333c6aa0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a3054f8,57,0,ffff8000333c6aa0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff8000333c6b50) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff8000333c6b50) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc58ee099f0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x9f8d5056870, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9f8d5056870, count: -1