uvm_fault(0xffffffff839367d8, 0xffff800026df2300, 0, 1) -> d fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff816f00a9 cs 8 rflags 10202 cr2 ffff800026df2300 cpl 0 rsp ffff80002a4791a8 gsbase 0xffff800029a9bff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff816f00a9 Starting stack trace... panic(ffffffff83323039) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a4790f0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x19 ufs_lookup() at ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(fffffd805ba43888,ffff80002a479538,ffff80002a479568) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a479508) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80002a479508) at namei+0x7aa sys/kern/vfs_lookup.c:250 dofstatat(ffff8000ffffa2b0,ffffff9c,7481e7d9eef0,7481e7d9f2f0,2) at dofstatat+0xe0 sys/kern/vfs_syscalls.c:2084 syscall(ffff80002a479780) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a479780) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7481e7d9f3a0, count: 246 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -53322808 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *329730 32140 0 0x2 0 1 syz-executor 267741 85227 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7be7fcd25bb0, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff839367d8, 0xffff800026df2300, 0, 1) -> d ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7be7fcd25bb0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3fcda0 rbx 0 rdx 0 rcx 0xffff8000ffffbc50 rax 0x3a r8 0xffff80002a3fccd0 r9 0x1 r10 0xc00caf4d4f4e2b8f r11 0xdd28a049fd561831 r12 0 r13 0 r14 0xffff8000ffffbc50 r15 0 rip 0xffffffff819343ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3fcd20 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=329730 pid=32140 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffca50,0xffff8000ffffb220 process=0xffff80002a300008 user=0xffff80002a3f7000, vmspace=0xfffffd807eb8cc78 estcpu=36, cpticks=2, pctcpu=0.56, user=2, sys=143, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77566 123620 36610 0 2 0x480 syz-executor 77566 354038 36610 0 3 0x4000080 fsleep syz-executor 77566 492320 36610 0 3 0x4000080 fsleep syz-executor 77566 500867 36610 0 3 0x4000080 fsleep syz-executor 52875 467616 32140 0 2 0 syz-executor 52875 372280 32140 0 2 0x4000000 syz-executor 99797 308387 88263 0 3 0x80 nanoslp syz-executor 99797 225147 88263 0 3 0x4000080 netacc syz-executor 99797 16904 88263 0 3 0x4000080 fsleep syz-executor 17939 219800 0 0 3 0x14200 acct acct 86782 409413 50920 0 3 0x80 nanoslp syz-executor 86782 361584 50920 0 3 0x4000080 fsleep syz-executor 86782 394111 50920 0 3 0x4000080 kqread syz-executor 48250 142601 85227 0 3 0x82 wait syz-executor 86439 355408 85227 0 3 0x82 wait syz-executor 47397 106928 0 0 3 0x14200 bored sosplice 14361 457067 1 0 3 0x100083 ttyin getty 36610 516144 85227 0 3 0x82 nanoslp syz-executor 17870 370070 85227 0 3 0x2 sbar syz-executor 50920 340977 85227 0 3 0x82 nanoslp syz-executor 37792 62801 85227 0 3 0x82 wait syz-executor *32140 329730 85227 0 7 0x2 syz-executor 88263 182518 85227 0 2 0x482 syz-executor 85227 267741 27459 0 7 0x2 syz-executor 27459 92173 83298 0 3 0x10008a sigsusp ksh 83298 402570 60143 0 3 0x98 kqread sshd-session 60143 271783 72837 0 3 0x92 kqread sshd-session 72837 174356 1 0 3 0x88 kqread sshd 73622 176711 1062 74 3 0x1100092 bpf pflogd 1062 158285 1 0 3 0x80 sbwait pflogd 30851 367472 48939 73 3 0x1100090 kqread syslogd 48939 442736 1 0 3 0x100082 sbwait syslogd 9321 365695 1 0 3 0x100080 kqread resolvd 57453 417788 84481 77 3 0x100092 kqread dhcpleased 3863 513940 84481 77 3 0x100092 kqread dhcpleased 84481 178977 1 0 3 0x80 kqread dhcpleased 38978 388649 0 0 3 0x14200 bored smr 60127 383814 0 0 2 0x14200 zerothread 14475 207393 0 0 3 0x14200 aiodoned aiodoned 42444 215536 0 0 3 0x14200 syncer update 93437 337145 0 0 3 0x14200 cleaner cleaner 14055 184862 0 0 3 0x14200 reaper reaper 43483 266292 0 0 3 0x14200 pgdaemon pagedaemon 77180 449678 0 0 3 0x14200 bored viomb 33219 72072 0 0 3 0x40014200 acpi0 acpi0 12763 349328 0 0 3 0x40014200 idle1 58522 472077 0 0 3 0x14200 bored softnet3 14463 357875 0 0 3 0x14200 bored softnet2 85946 193651 0 0 3 0x14200 bored softnet1 22892 373314 0 0 2 0x14200 softnet0 65286 221123 0 0 2 0x14200 systqmp 8855 324133 0 0 3 0x14200 bored systq 28358 177530 0 0 3 0x14200 tmoslp softclockmp 15420 419266 0 0 3 0x40014200 tmoslp softclock 15141 4475 0 0 3 0x40014200 idle0 1 228390 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &kq->kq_lock r = 0 (0xfffffd806eaac0e8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 kqueue_register+0x128c sys/kern/kern_event.c:1402 #4 pselregister+0x135 sys/kern/sys_generic.c:760 #5 dopselect+0x503 sys/kern/sys_generic.c:653 #6 sys_pselect+0x263 sys/kern/sys_generic.c:589 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 Process 17870 (syz-executor) thread 0xffff8000ffffa2b0 (370070) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11105K 11490K 166960K 12493 0 pcb 18 13K 14K 166960K 178 0 rtable 230 10K 10K 166960K 646 0 pf 36 18K 22K 166960K 136 0 ifaddr 41 7K 8K 166960K 97 0 ifgroup 55 2K 2K 166960K 153 0 sysctl 4 1K 1K 166960K 8 0 counters 64 36K 37K 166960K 166 0 ioctlops 0 0K 4K 166960K 1648 0 iov 0 0K 16K 166960K 131 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1394 88K 88K 166960K 2226 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 9K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 111 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1014 0 sigio 0 0K 0K 166960K 24 0 proc 72 91K 128K 166960K 698 0 subproc 72 4K 4K 166960K 91 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 318 0 in_multi 97 7K 7K 166960K 162 0 ether_multi 1 0K 0K 166960K 8 0 mrt 2 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 507 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 247 168K 182K 166960K 10664 0 UVM aobj 91 3K 3K 166960K 94 0 pinsyscall 42 84K 104K 166960K 2148 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 35 0 NDP 12 0K 2K 166960K 63 0 temp 76 8692K 8786K 166960K 32249 0 kqueue 14 22K 30K 166960K 205 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 120 189 0 184 3 1 2 3 0 8 1 rtentry 168 221 0 122 5 0 5 5 0 8 0 unpcb 144 709 0 689 9 7 2 6 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 808 354 0 283 11 3 8 8 0 8 0 arp 120 23 0 9 1 0 1 1 0 8 0 inpcb 376 984 0 909 11 0 11 11 0 8 3 nd6 136 36 0 7 2 0 2 2 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 38 0 38 1 0 1 1 0 8 1 pppxif 1480 9 0 9 2 1 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 4 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 4 0 1 1 0 1 1 0 8 0 pfstitem 24 65 0 16 1 0 1 1 0 8 0 pfstkey 128 65 0 16 2 0 2 2 0 8 0 pfstate 376 64 0 16 5 0 5 5 0 8 0 pfrule 1344 33 0 22 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 699 0 248 33 2 31 31 0 8 2 art_table 32 701 0 248 4 0 4 4 0 8 0 art_node 16 153 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 112 108 0 98 1 0 1 1 0 8 0 shmpl 112 91 0 3 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3257 0 1749 95 0 95 95 0 8 0 ffsino 280 3257 0 1749 109 0 109 109 0 8 0 nchpl 144 4650 0 2951 64 0 64 64 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 uvmvnodes 80 3826 0 0 79 0 79 79 0 8 0 vnodes 216 3826 0 0 213 0 213 213 0 8 0 namei 1024 15547 0 15546 1 0 1 1 0 8 0 percpumem 16 97 0 51 1 0 1 1 0 8 0 kstatmem 264 86 0 62 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 14146 0 14146 10 4 6 8 1 8 6 plimitpl 152 228 0 211 1 0 1 1 0 8 0 sigapl 424 1312 0 1261 8 2 6 7 0 8 0 futexpl 64 13222 0 13217 1 0 1 1 0 8 0 knotepl 120 763 0 0 24 0 24 24 0 8 0 kqueuepl 216 477 0 403 6 1 5 5 0 8 0 pipepl 328 248 0 221 3 0 3 3 0 8 0 fdescpl 504 1291 0 1260 5 0 5 5 0 8 0 filepl 152 7876 0 7515 18 2 16 16 0 8 2 lockfpl 104 314 0 312 1 0 1 1 0 8 0 lockfspl 48 128 0 126 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 1276 0 1263 1 0 1 1 0 8 0 zombiepl 144 1264 0 1261 1 0 1 1 0 8 0 processpl 1176 1312 0 1261 5 0 5 5 0 8 0 procpl 656 2735 0 2676 7 1 6 6 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 9 0 9 1 1 0 1 0 8 0 sockpl 688 1895 0 1795 20 8 12 16 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 72 0 0 9 0 9 9 0 8 1 mtagpl 96 49 0 0 2 0 2 2 0 8 0 mbufpl 256 257 0 0 17 0 17 17 0 8 1 bufpl 280 7137 0 983 440 0 440 440 0 8 0 anonpl 24 195359 0 191942 54 8 46 53 0 184 11 amapchunkpl 152 35212 0 34707 32 4 28 29 0 158 5 amappl16 200 4066 0 4032 20 7 13 15 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 119 0 106 1 0 1 1 0 8 0 amappl13 176 29 0 29 1 1 0 1 0 8 0 amappl12 168 1966 0 1935 3 1 2 2 0 8 0 amappl11 160 70 0 56 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 201 0 197 1 0 1 1 0 8 0 amappl5 112 134 0 124 1 0 1 1 0 8 0 amappl4 104 356 0 337 1 0 1 1 0 8 0 amappl3 96 7050 0 6934 5 1 4 4 0 8 0 amappl2 88 672 0 609 2 0 2 2 0 8 0 amappl1 80 11951 0 11341 16 2 14 15 0 8 1 amappl 88 9761 0 9588 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 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 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 93 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1292 0 1261 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1292 0 1261 1 0 1 1 0 8 0 vmmpekpl 168 11413 0 11366 3 0 3 3 0 8 0 vmmpepl 168 85416 0 83412 102 1 101 101 0 357 10 vmsppl 456 1291 0 1261 5 0 5 5 0 8 1 rwobjpl 64 27478 0 22613 79 0 79 79 0 8 0 pdppl 4096 2592 0 2522 102 30 72 86 0 8 2 pvpl 32 18556 0 0 152 2 150 150 0 265 0 pmappl 248 1291 0 1261 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 305 0 39 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b0ff0) 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 __mp_lock(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a3a6090,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f FRAC_TO_NSEC sys/sys/time.h:239 [inline] getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f BINTIME_TO_TIMESPEC sys/sys/time.h:246 [inline] getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f sys/kern/kern_tc.c:387 kqueue_sleep(fffffd806eaac0d8,ffff80002a3a6788) at kqueue_sleep+0x8e TIMESPEC_TO_NSEC sys/sys/time.h:-1 [inline] kqueue_sleep(fffffd806eaac0d8,ffff80002a3a6788) at kqueue_sleep+0x8e sys/kern/kern_event.c:1451 kqueue_scan(ffff80002a3a6550,8,ffff80002a3a6450,ffff80002a3a6788,ffff80002a2f8a48,ffff80002a3a66fc) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff80002a2f8a48,35,752a550f3ed0,0,0,ffff80002a3a6788,6d092061fc670dc9,ffff80002a2f8a48) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff80002a2f8a48,ffff80002a3a68d0,ffff80002a3a6820) at sys_pselect+0x263 sys/kern/sys_generic.c:589 end trace frame: 0xffff80002a3a68c0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837b0ff0) 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 __mp_lock(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a3a6090,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f FRAC_TO_NSEC sys/sys/time.h:239 [inline] getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f BINTIME_TO_TIMESPEC sys/sys/time.h:246 [inline] getnanouptime(ffff80002a3a62d8) at getnanouptime+0x5f sys/kern/kern_tc.c:387 kqueue_sleep(fffffd806eaac0d8,ffff80002a3a6788) at kqueue_sleep+0x8e TIMESPEC_TO_NSEC sys/sys/time.h:-1 [inline] kqueue_sleep(fffffd806eaac0d8,ffff80002a3a6788) at kqueue_sleep+0x8e sys/kern/kern_event.c:1451 kqueue_scan(ffff80002a3a6550,8,ffff80002a3a6450,ffff80002a3a6788,ffff80002a2f8a48,ffff80002a3a66fc) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff80002a2f8a48,35,752a550f3ed0,0,0,ffff80002a3a6788,6d092061fc670dc9,ffff80002a2f8a48) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff80002a2f8a48,ffff80002a3a68d0,ffff80002a3a6820) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a3a68d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a68d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x752a550f3e80, count: -16 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x680 savectx() at savectx+0xae end of kernel end trace frame: 0x7be7fcd25bb0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7be7fcd25bb0, count: -1