panic: mtx 0xffffffff839147a8: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *232255 77568 32767 0x10 0 0 syz-executor 140553 87979 32767 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f2363) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839147a8) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839147a8) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008392528) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c2a4df0,0,ffff80003c41ec68,ffff80003c41ec4c,0,2,3c1d1b154d8b0bd1,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ed00,ffff80003c41ece8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ee00) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4933e8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c41f010,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c41f010) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e07eafc5120, 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 0xffffffff839147a8: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f2363) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839147a8) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839147a8) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008392528) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c2a4df0,0,ffff80003c41ec68,ffff80003c41ec4c,0,2,3c1d1b154d8b0bd1,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ed00,ffff80003c41ece8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ee00) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4933e8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c41f010,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c41f010) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e07eafc5120, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c41e9a0 rbx 0xffffffff8389edd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c4354b8 rax 0xffffffff8389dff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfdbb2c1cc839101f r11 0x5ec8e62367a81e5c r12 0xffffffff8389ebd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff8223eb65 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c41e990 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=232255 pid=77568 tcnt=4 stat=onproc flags process=10 proc=0 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4359d8,0xffff80003c4347f8 process=0xffff80003a812bb8 user=0xffff80003c41a000, vmspace=0xfffffd806c4933e8 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *77568 232255 48963 32767 7 0x10 syz-executor 77568 169066 48963 32767 3 0x4000090 fsleep syz-executor 77568 7470 48963 32767 3 0x4000010 biowait syz-executor 77568 399813 48963 32767 3 0x4000090 fsleep syz-executor 87979 140553 59043 32767 7 0x10 syz-executor 87979 135603 59043 32767 3 0x4000090 lockf syz-executor 87979 168374 59043 32767 3 0x4000090 lockf syz-executor 33489 20546 18293 32767 2 0x10 syz-executor 33489 515417 18293 32767 3 0x4000090 fsleep syz-executor 86188 50840 28962 32767 3 0x90 nanoslp syz-executor 86188 75919 28962 32767 3 0x4000090 ttyin syz-executor 86188 99264 28962 32767 3 0x4000090 fsleep syz-executor 86188 269250 28962 32767 3 0x4000090 fsleep syz-executor 8438 26898 18514 32767 2 0x10 syz-executor 8438 306339 18514 32767 3 0x4000090 fsleep syz-executor 8438 290481 18514 32767 3 0x4000090 fsleep syz-executor 5174 342719 84928 32767 3 0x90 nanoslp syz-executor 5174 68427 84928 32767 3 0x4000090 ttyin syz-executor 5174 160209 84928 32767 3 0x4000090 fsleep syz-executor 39364 135980 0 0 3 0x14200 bored sosplice 65649 136725 70373 32767 3 0x90 nanoslp syz-executor 65649 467821 70373 32767 3 0x4000090 kqsel syz-executor 65649 374294 70373 32767 3 0x4000090 fsleep syz-executor 34692 418462 61876 32767 3 0x90 nanoslp syz-executor 34692 219869 61876 32767 3 0x4000090 kqread syz-executor 34692 94997 61876 32767 3 0x4000090 kqread syz-executor 34692 452516 61876 32767 3 0x4000090 fsleep syz-executor 18293 397106 35380 32767 3 0x90 nanoslp syz-executor 70373 141996 24919 32767 3 0x90 nanoslp syz-executor 48963 391014 32394 32767 3 0x90 nanoslp syz-executor 59043 306191 46169 32767 3 0x90 nanoslp syz-executor 28962 109116 52027 32767 3 0x90 nanoslp syz-executor 61876 459720 23332 32767 3 0x90 nanoslp syz-executor 84928 108248 63983 32767 3 0x90 nanoslp syz-executor 18514 137717 11099 32767 3 0x90 nanoslp syz-executor 46169 469012 75280 0 3 0x82 wait syz-executor 35380 351494 75280 0 3 0x82 wait syz-executor 32394 386951 75280 0 3 0x82 wait syz-executor 24919 84576 75280 0 3 0x82 wait syz-executor 52027 505512 75280 0 3 0x82 wait syz-executor 23332 13565 75280 0 3 0x82 wait syz-executor 63983 327526 75280 0 3 0x82 wait syz-executor 11099 177678 75280 0 3 0x82 wait syz-executor 75280 181893 39878 0 3 0x82 kqread syz-executor 39878 107439 26094 0 3 0x10008a sigsusp ksh 26094 165131 73327 0 3 0x98 kqread sshd-session 73327 280556 92032 0 3 0x92 kqread sshd-session 13805 159091 1 0 3 0x100083 ttyin getty 92032 192151 1 0 3 0x88 kqread sshd 64580 438156 1510 73 3 0x1100090 kqread syslogd 1510 63076 1 0 3 0x100082 sbwait syslogd 61677 256201 1 0 3 0x100080 kqread resolvd 17513 256834 63057 77 3 0x100092 kqread dhcpleased 17878 347305 63057 77 3 0x100092 kqread dhcpleased 63057 111650 1 0 3 0x80 kqread dhcpleased 92540 326145 0 0 3 0x14200 bored smr 63338 414165 0 0 2 0x14200 zerothread 92739 214091 0 0 3 0x14200 aiodoned aiodoned 29151 370581 0 0 3 0x14200 syncer update 80755 182874 0 0 3 0x14200 cleaner cleaner 43279 343231 0 0 3 0x14200 reaper reaper 20141 66677 0 0 3 0x14200 pgdaemon pagedaemon 98205 401643 0 0 3 0x14200 bored viomb 9008 65933 0 0 3 0x40014200 acpi0 acpi0 38487 155047 0 0 3 0x40014200 idle1 31720 41643 0 0 3 0x14200 bored softnet3 35467 181125 0 0 3 0x14200 bored softnet2 75665 134940 0 0 3 0x14200 bored softnet1 2187 34035 0 0 3 0x14200 bored softnet0 89942 518743 0 0 3 0x14200 bored systqmp 68365 193363 0 0 3 0x14200 bored systq 52858 25765 0 0 3 0x14200 tmoslp softclockmp 64013 154478 0 0 3 0x40014200 tmoslp softclock 39504 22937 0 0 3 0x40014200 idle0 1 370469 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 (0xffffffff839147b8) #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:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #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:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 77568 (syz-executor) thread 0xffff80003c4354b8 (232255) exclusive rwlock uobjlk r = 0 (0xfffffd806c305da8) #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:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839147b8) #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:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #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:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 77568 (syz-executor) thread 0xffff80003c4342c8 (7470) exclusive rrwlock inode r = 0 (0xfffffd806c0f57a0) #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:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 10956K 10967K 166960K 11270 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 347 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 16K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1352 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 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 125K 166960K 171 0 sigio 0 0K 0K 166960K 1 0 proc 58 79K 127K 166960K 474 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 14 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 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 336 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 274 169K 177K 166960K 3011 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 47 94K 112K 166960K 1163 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 4 0 NDP 27 2K 2K 166960K 27 0 temp 35 8670K 8734K 166960K 3697 0 kqueue 17 25K 25K 166960K 32 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 35 0 32 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 45 0 28 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 21 0 17 1 0 1 1 0 8 0 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 328 159 0 148 7 0 7 7 0 8 5 nd6 144 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1583 0 77 95 0 95 95 0 8 0 ffsino 288 1583 0 77 108 0 108 108 0 8 0 nchpl 144 1807 0 124 63 0 63 63 0 8 0 uvmvnodes 80 1664 0 0 34 0 34 34 0 8 0 vnodes 216 1664 0 0 93 0 93 93 0 8 0 namei 1024 5255 0 5255 2 0 2 2 0 8 2 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 5962 0 5960 4 1 3 3 1 8 2 plimitpl 152 42 0 15 2 0 2 2 0 8 0 sigapl 424 442 0 385 9 1 8 8 0 8 0 knotepl 120 55 0 0 2 0 2 2 0 8 0 kqueuepl 224 29 0 14 1 0 1 1 0 8 0 pipepl 336 98 0 71 3 0 3 3 0 8 0 fdescpl 520 423 0 385 4 0 4 4 0 8 0 filepl 160 1514 0 1289 12 0 12 12 0 8 2 lockfpl 104 19 0 13 1 0 1 1 0 8 0 lockfspl 48 9 0 5 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 138 0 119 1 0 1 1 0 8 0 zombiepl 144 385 0 385 1 0 1 1 0 8 1 processpl 1240 442 0 385 5 0 5 5 0 8 0 procpl 656 506 0 431 8 1 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 239 0 208 9 0 9 9 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 157 0 0 10 0 10 10 0 8 0 bufpl 280 2400 0 116 164 0 164 164 0 8 0 anonpl 32 3699 0 0 30 0 30 30 0 246 0 amapchunkpl 152 8599 0 7966 25 0 25 25 0 158 0 amappl16 200 1762 0 1742 5 0 5 5 0 8 3 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 153 0 143 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 0 1 1 0 8 1 amappl12 168 1017 0 979 3 1 2 2 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 0 1 1 0 8 1 amappl9 144 271 0 271 1 0 1 1 0 8 1 amappl8 136 16 0 15 1 0 1 1 0 8 0 amappl7 128 92 0 82 1 0 1 1 0 8 0 amappl6 120 180 0 177 1 0 1 1 0 8 0 amappl5 112 124 0 117 1 0 1 1 0 8 0 amappl4 104 276 0 259 1 0 1 1 0 8 0 amappl3 96 1424 0 1281 4 0 4 4 0 8 0 amappl2 88 591 0 534 2 0 2 2 0 8 0 amappl1 80 7800 0 7222 13 0 13 13 0 8 0 amappl 88 2398 0 2190 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 423 0 385 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 423 0 385 1 0 1 1 0 8 0 vmmpekpl 168 4931 0 4901 2 0 2 2 0 8 0 vmmpepl 168 33213 0 31043 95 0 95 95 0 357 0 vmsppl 480 422 0 385 6 0 6 6 0 8 0 rwobjpl 72 13625 0 11087 47 0 47 47 0 8 0 pdppl 4096 853 0 770 109 12 97 97 0 8 14 pvpl 32 9770 0 0 79 0 79 79 0 265 0 pmappl 256 422 0 385 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 389 0 14 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(ffffffff833f2363) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839147a8) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839147a8) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008392528) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008392528) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c2a4df0,0,ffff80003c41ec68,ffff80003c41ec4c,0,2,3c1d1b154d8b0bd1,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ed00,ffff80003c41ece8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c41ee80,ffff80003c41eeb8,ffff80003c41ee00) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4933e8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c41f010,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c41f010) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e07eafc5120, 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 end of kernel end trace frame: 0x71457e591c60, count: 12 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 end of kernel end trace frame: 0x71457e591c60, count: -3