uvm_fault(fffffd806b7f4028,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c44b5c0,200000000040) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c44b5c0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71a648eca930, count: 2 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: mtx 0xffffffff838f5408: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f7094) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838f5408) at mtx_enter_try+0x1da sys/kern/kern_lock.c:290 mtx_enter(ffffffff838f5408) at mtx_enter+0x62 sys/kern/kern_lock.c:258 uvm_pageclean(fffffd8008349cc8) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008349cc8) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008349cc8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80628a8cd8,0,ffff80003c44b218,ffff80003c44b1fc,0,2,e6f26e69574116f8,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c44b430,ffff80003c44b468,ffff80003c44b2b0,ffff80003c44b298) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c44b430,ffff80003c44b468,ffff80003c44b3b0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b7f4028,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c44b5c0,200000000040) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c44b5c0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71a648eca930, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c44af50 rbx 0xffffffff837e7dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c00f9d0 rax 0xffffffff837e6ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xdb5fae1f2a4c8493 r11 0x87f6f3144d08df2d r12 0xffffffff837e7bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff8192ef15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c44af40 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=82421 pid=97167 tcnt=4 stat=onproc flags process=10 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c00f220,0xffff80003c00ea80 process=0xffff80003c011380 user=0xffff80003c446000, vmspace=0xfffffd806b7f4028 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42198 44614 56457 0 2 0 syz-executor 64201 63893 39365 32767 2 0x10 syz-executor 64201 309918 39365 32767 3 0x4000090 fsleep syz-executor *97167 82421 60164 32767 7 0x10 syz-executor 97167 289747 60164 32767 7 0x4000010 syz-executor 97167 151311 60164 32767 3 0x4000010 biowait syz-executor 97167 406784 60164 32767 3 0x4000090 fsleep syz-executor 7255 133832 58234 32767 2 0x10 syz-executor 7255 154176 58234 32767 3 0x4000090 fsleep syz-executor 56457 267101 81248 0 3 0x82 wait syz-executor 5066 196673 55803 32767 2 0x10 syz-executor 5066 456128 55803 32767 3 0x4000090 fsleep syz-executor 5066 46107 55803 32767 3 0x4000090 fsleep syz-executor 84676 88534 53562 32767 3 0x90 nanoslp syz-executor 84676 393973 53562 32767 3 0x4000090 kqsel syz-executor 84676 480400 53562 32767 3 0x4000090 fsleep syz-executor 59637 430725 0 0 3 0x14200 bored sosplice 3080 110589 8129 32767 3 0x90 nanoslp syz-executor 3080 251716 8129 32767 3 0x4000090 fifor syz-executor 3080 235941 8129 32767 3 0x4000090 fsleep syz-executor 3080 62393 8129 32767 3 0x4000090 fsleep syz-executor 58234 396415 57471 32767 3 0x90 nanoslp syz-executor 55803 449502 27736 32767 3 0x90 nanoslp syz-executor 60164 509594 40152 32767 3 0x90 nanoslp syz-executor 53562 314710 6159 32767 3 0x90 nanoslp syz-executor 33855 463856 29641 32767 3 0x90 nanoslp syz-executor 39365 127921 5662 32767 3 0x90 nanoslp syz-executor 8129 377244 91333 32767 3 0x90 nanoslp syz-executor 6159 417801 81248 0 3 0x82 wait syz-executor 29641 170477 81248 0 3 0x82 wait syz-executor 57471 14135 81248 0 3 0x82 wait syz-executor 27736 138041 81248 0 3 0x82 wait syz-executor 40152 272268 81248 0 3 0x82 wait syz-executor 5662 301227 81248 0 3 0x82 wait syz-executor 91333 225852 81248 0 3 0x82 wait syz-executor 81248 483526 28558 0 3 0x82 kqread syz-executor 28558 246841 12990 0 3 0x10008a sigsusp ksh 12990 31432 60545 0 3 0x98 kqread sshd-session 60545 115135 45258 0 3 0x92 kqread sshd-session 85187 349277 1 0 3 0x100083 ttyin getty 45258 158371 1 0 3 0x88 kqread sshd 89631 243125 47168 73 3 0x1100090 kqread syslogd 47168 469426 1 0 3 0x100082 sbwait syslogd 40146 9812 1 0 3 0x100080 kqread resolvd 26025 228749 32420 77 3 0x100092 kqread dhcpleased 29083 95126 32420 77 3 0x100092 kqread dhcpleased 32420 328743 1 0 3 0x80 kqread dhcpleased 37313 199813 0 0 3 0x14200 bored smr 12202 82700 0 0 2 0x14200 zerothread 27252 426844 0 0 3 0x14200 aiodoned aiodoned 76185 277063 0 0 3 0x14200 syncer update 23826 104162 0 0 3 0x14200 cleaner cleaner 99399 56509 0 0 3 0x14200 reaper reaper 1180 276576 0 0 3 0x14200 pgdaemon pagedaemon 34774 221639 0 0 3 0x14200 bored viomb 2622 168070 0 0 3 0x40014200 acpi0 acpi0 3135 212894 0 0 3 0x40014200 idle1 50143 144103 0 0 3 0x14200 bored softnet3 61188 520315 0 0 3 0x14200 bored softnet2 99867 171703 0 0 3 0x14200 bored softnet1 38730 259738 0 0 3 0x14200 bored softnet0 91666 36775 0 0 3 0x14200 bored systqmp 29559 212415 0 0 3 0x14200 bored systq 15155 413141 0 0 3 0x14200 tmoslp softclockmp 78673 162097 0 0 3 0x40014200 tmoslp softclock 50168 142135 0 0 3 0x40014200 idle0 1 299621 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838f5418) #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+0x1ad sys/kern/kern_lock.c:301 #2 mtx_enter+0x62 sys/kern/kern_lock.c:258 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 CPU 1: exclusive mutex &pr->ps_mtx r = 0 (0xffff80003c0114a0) #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+0x1ad sys/kern/kern_lock.c:301 #2 mtx_enter+0x62 sys/kern/kern_lock.c:258 #3 proc_suspend_check+0x43 sys/kern/kern_sig.c:2281 #4 sleep_signal_check+0x49 sys/kern/kern_synch.c:449 #5 sleep_finish+0x179 sys/kern/kern_synch.c:338 #6 sys_futex+0xa24 futex_wait sys/kern/sys_futex.c:301 [inline] #6 sys_futex+0xa24 sys/kern/sys_futex.c:151 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #8 Xsyscall+0x128 Process 97167 (syz-executor) thread 0xffff80003c00f9d0 (82421) exclusive rwlock uobjlk r = 0 (0xfffffd806d6ab588) #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+0x377 sys/kern/kern_rwlock.c:310 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1297 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838f5418) #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+0x1ad sys/kern/kern_lock.c:301 #2 mtx_enter+0x62 sys/kern/kern_lock.c:258 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #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 97167 (syz-executor) thread 0xffff8000ffff1730 (151311) exclusive rrwlock inode r = 0 (0xfffffd806e2ade28) #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+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2912 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 10953K 10967K 166960K 11270 0 pcb 17 12K 12K 166960K 17 0 rtable 216 6K 6K 166960K 358 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 7 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 14K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1455 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 244 0 proc 58 79K 115K 166960K 485 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 34 0 in_multi 88 6K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 351 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 152K 162K 166960K 3632 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 46 92K 110K 166960K 1266 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 10 0K 2K 166960K 27 0 temp 42 8687K 8751K 166960K 7499 0 kqueue 14 22K 24K 166960K 40 0 SYN cache 2 16K 16K 166960K 2 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 44 0 41 1 0 1 1 0 8 0 rtentry 176 113 0 12 6 0 6 6 0 8 0 unpcb 144 108 0 85 2 0 2 2 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 41 0 35 1 0 1 1 0 8 0 arp 128 18 0 2 1 0 1 1 0 8 0 inpcb 328 150 0 137 2 0 2 2 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 26 0 3 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 456 0 44 29 0 29 29 0 8 1 art_table 32 457 0 44 4 0 4 4 0 8 0 art_node 16 112 0 20 1 0 1 1 0 8 0 semapl 112 4 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1753 0 242 95 0 95 95 0 8 0 ffsino 288 1753 0 242 108 0 108 108 0 8 0 nchpl 144 2070 0 382 63 0 63 63 0 8 0 uvmvnodes 80 1861 0 0 38 0 38 38 0 8 0 vnodes 216 1861 0 0 104 0 104 104 0 8 0 namei 1024 6155 0 6155 1 0 1 1 0 8 1 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 6658 0 6656 8 0 8 8 1 8 7 plimitpl 152 46 0 22 2 0 2 2 0 8 1 sigapl 424 518 0 462 7 0 7 7 0 8 0 knotepl 120 353 0 0 11 0 11 11 0 8 0 kqueuepl 224 43 0 31 1 0 1 1 0 8 0 pipepl 336 121 0 93 3 0 3 3 0 8 0 fdescpl 520 499 0 462 3 0 3 3 0 8 0 filepl 160 2059 0 1828 12 0 12 12 0 8 2 lockfpl 104 22 0 18 1 0 1 1 0 8 0 lockfspl 48 12 0 8 1 0 1 1 0 8 0 sessionpl 144 23 0 8 1 0 1 1 0 8 0 pgrppl 48 36 0 13 1 0 1 1 0 8 0 ucredpl 104 408 0 390 1 0 1 1 0 8 0 zombiepl 144 463 0 462 1 0 1 1 0 8 0 processpl 1240 518 0 462 5 0 5 5 0 8 0 procpl 656 673 0 605 7 0 7 7 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 305 0 266 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 249 0 0 16 0 16 16 0 8 0 bufpl 280 2406 0 116 164 0 164 164 0 8 0 anonpl 32 7827 0 0 64 0 64 64 0 246 0 amapchunkpl 152 11686 0 11021 35 0 35 35 0 158 7 amappl16 200 1970 0 1915 6 0 6 6 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 103 0 93 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1109 0 1073 2 0 2 2 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 2 2 0 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 92 0 82 1 0 1 1 0 8 0 amappl6 120 178 0 175 1 0 1 1 0 8 0 amappl5 112 121 0 115 1 0 1 1 0 8 0 amappl4 104 282 0 265 1 0 1 1 0 8 0 amappl3 96 1843 0 1708 4 0 4 4 0 8 0 amappl2 88 608 0 552 2 0 2 2 0 8 0 amappl1 80 8265 0 7688 14 0 14 14 0 8 0 amappl 88 2978 0 2780 5 0 5 5 0 92 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 499 0 462 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 499 0 462 1 0 1 1 0 8 0 vmmpekpl 168 5571 0 5532 3 0 3 3 0 8 0 vmmpepl 168 37848 0 35671 100 0 100 100 0 357 3 vmsppl 480 498 0 462 7 1 6 6 0 8 1 rwobjpl 72 14807 0 12033 51 0 51 51 0 8 0 pdppl 4096 1006 0 924 110 26 84 96 0 8 2 pvpl 32 15497 0 0 125 0 125 125 0 265 0 pmappl 256 498 0 462 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 398 0 29 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f7094) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838f5408) at mtx_enter_try+0x1da sys/kern/kern_lock.c:290 mtx_enter(ffffffff838f5408) at mtx_enter+0x62 sys/kern/kern_lock.c:258 uvm_pageclean(fffffd8008349cc8) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008349cc8) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008349cc8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80628a8cd8,0,ffff80003c44b218,ffff80003c44b1fc,0,2,e6f26e69574116f8,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c44b430,ffff80003c44b468,ffff80003c44b2b0,ffff80003c44b298) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c44b430,ffff80003c44b468,ffff80003c44b3b0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b7f4028,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c44b5c0,200000000040) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c44b5c0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71a648eca930, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 savectx() at savectx+0xae end of kernel end trace frame: 0x542aaca1060, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 savectx() at savectx+0xae end of kernel end trace frame: 0x542aaca1060, count: -5