panic: mtx 0xffffffff83917148: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 22079 78724 32767 0x10 0 1 syz-executor *196147 60273 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83332f45) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83917148) at mtx_enter_try+0x1da mtx_enter(ffffffff83917148) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fca088) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805f3c6af8,0,ffff80003201ef98,ffff80003201ef7c,0,2,94321fd4066e8c91,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f030,ffff80003201f018) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f130) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd8069dbb5e8,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003201f340,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003201f340) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x782735ac84d0, 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 0xffffffff83917148: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83332f45) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83917148) at mtx_enter_try+0x1da mtx_enter(ffffffff83917148) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fca088) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805f3c6af8,0,ffff80003201ef98,ffff80003201ef7c,0,2,94321fd4066e8c91,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f030,ffff80003201f018) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f130) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd8069dbb5e8,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003201f340,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003201f340) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x782735ac84d0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003201ecd0 rbx 0xffffffff8379bddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80002a2f4a80 rax 0xffffffff8379aff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfc74a8db0a884fd6 r11 0x8a1ea0e920fe3eed r12 0xffffffff8379bbe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff8180d925 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003201ecc0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=196147 pid=60273 tcnt=4 stat=onproc flags process=10 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2f4020,0xffff80002a2f5788 process=0xffff80003c488030 user=0xffff80003201a000, vmspace=0xfffffd8069dbb5e8 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78724 22079 42718 32767 7 0x10 syz-executor 78724 416115 42718 32767 2 0x4000010 syz-executor 78724 239762 42718 32767 2 0x4000010 syz-executor *60273 196147 19089 32767 7 0x10 syz-executor 60273 334183 19089 32767 3 0x4000090 fsleep syz-executor 60273 252520 19089 32767 3 0x4000010 biowait syz-executor 60273 157654 19089 32767 3 0x4000090 fsleep syz-executor 37226 145139 99438 32767 3 0x90 nanoslp syz-executor 37226 368880 99438 32767 3 0x4000090 kqsel syz-executor 70359 129009 4101 32767 2 0x10 syz-executor 70359 378053 4101 32767 3 0x4000090 msgwait syz-executor 70359 215102 4101 32767 3 0x4000090 fsleep syz-executor 94509 313798 50793 32767 3 0x90 nanoslp syz-executor 94509 4658 50793 32767 3 0x4000090 piperd syz-executor 94509 181579 50793 32767 3 0x4000090 fsleep syz-executor 66888 92441 92242 32767 3 0x90 nanoslp syz-executor 66888 443933 92242 32767 3 0x4000090 ttyout syz-executor 66888 22142 92242 32767 3 0x4000090 fsleep syz-executor 24008 245042 0 0 3 0x14200 bored sosplice 50793 287581 77444 32767 3 0x90 nanoslp syz-executor 80370 244090 3236 32767 3 0x90 nanoslp syz-executor 19089 64583 61755 32767 3 0x90 nanoslp syz-executor 4101 437955 5826 32767 3 0x90 nanoslp syz-executor 42718 220533 39065 32767 3 0x90 nanoslp syz-executor 99438 112693 18761 32767 3 0x90 nanoslp syz-executor 92242 294499 5251 32767 3 0x90 nanoslp syz-executor 8170 180183 52763 32767 3 0x90 nanoslp syz-executor 3236 469611 42505 0 3 0x82 wait syz-executor 77444 139172 42505 0 3 0x82 wait syz-executor 61755 58656 42505 0 3 0x82 wait syz-executor 39065 461909 42505 0 3 0x82 wait syz-executor 5826 468880 42505 0 3 0x82 wait syz-executor 18761 322876 42505 0 3 0x82 wait syz-executor 5251 35328 42505 0 3 0x82 wait syz-executor 52763 230363 42505 0 3 0x82 wait syz-executor 42505 285624 88544 0 3 0x82 kqread syz-executor 88544 206987 78694 0 3 0x10008a sigsusp ksh 78694 153236 46390 0 3 0x98 kqread sshd-session 46390 247409 70658 0 3 0x92 kqread sshd-session 27547 391146 1 0 3 0x100083 ttyin getty 70658 95016 1 0 3 0x88 kqread sshd 26197 485424 117 73 3 0x1100090 kqread syslogd 117 77223 1 0 3 0x100082 sbwait syslogd 33456 365572 1 0 3 0x100080 kqread resolvd 89053 116019 22025 77 3 0x100092 kqread dhcpleased 83397 499687 22025 77 3 0x100092 kqread dhcpleased 22025 512860 1 0 3 0x80 kqread dhcpleased 79625 73425 0 0 3 0x14200 bored smr 30137 28076 0 0 2 0x14200 zerothread 75540 152173 0 0 3 0x14200 aiodoned aiodoned 44397 175087 0 0 3 0x14200 syncer update 39194 130577 0 0 3 0x14200 cleaner cleaner 75398 31699 0 0 3 0x14200 reaper reaper 42350 515893 0 0 3 0x14200 pgdaemon pagedaemon 17740 88263 0 0 3 0x14200 bored viomb 12209 468474 0 0 3 0x40014200 acpi0 acpi0 63603 141347 0 0 3 0x40014200 idle1 53640 430807 0 0 3 0x14200 bored softnet7 98178 501977 0 0 3 0x14200 bored softnet6 30025 246278 0 0 3 0x14200 bored softnet5 81640 523436 0 0 3 0x14200 bored softnet4 70017 346226 0 0 3 0x14200 bored softnet3 94397 316669 0 0 3 0x14200 bored softnet2 30512 48881 0 0 3 0x14200 bored softnet1 65202 180935 0 0 3 0x14200 bored softnet0 11190 464964 0 0 3 0x14200 bored systqmp 48085 492801 0 0 3 0x14200 bored systq 5538 4581 0 0 3 0x14200 tmoslp softclockmp 58688 212352 0 0 3 0x40014200 tmoslp softclock 89882 428936 0 0 3 0x40014200 idle0 1 287063 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 (0xffffffff83917158) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 60273 (syz-executor) thread 0xffff80002a2f4a80 (196147) exclusive rwlock uobjlk r = 0 (0xfffffd805f698390) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1298 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83917158) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 60273 (syz-executor) thread 0xffff80002a2f4d18 (252520) exclusive rrwlock inode r = 0 (0xfffffd805fab5450) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c1 sys/kern/vfs_syscalls.c:2912 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 10956K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 207 5K 6K 166960K 271 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 31 0 iov 0 0K 12K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1372 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 285 0 sigio 1 0K 0K 166960K 3 0 proc 58 99K 179K 166960K 501 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 0 0K 0K 166960K 30 0 in_multi 99 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 370 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 260 160K 173K 166960K 4181 0 UVM aobj 11 2K 3K 166960K 12 0 pinsyscall 47 94K 109K 166960K 1322 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 11 0K 2K 166960K 27 0 temp 47 8637K 8701K 166960K 4380 0 kqueue 14 22K 24K 166960K 55 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 120 118 0 114 3 0 3 3 0 8 2 rtentry 176 96 0 1 5 0 5 5 0 8 0 unpcb 144 128 0 113 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 105 0 101 4 0 4 4 0 8 3 arp 128 10 0 0 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 2 0 2 1 0 1 1 0 8 1 inpcb 328 246 0 238 4 0 4 4 0 8 2 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 144 17 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 256 439 0 0 28 0 28 28 0 8 0 art_table 40 440 0 0 5 0 5 5 0 8 0 art_node 32 96 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1776 0 272 95 0 95 95 0 8 0 ffsino 296 1776 0 272 117 0 117 117 0 8 0 nchpl 144 2176 0 497 63 0 63 63 0 8 0 uvmvnodes 80 1857 0 0 38 0 38 38 0 8 0 vnodes 216 1857 0 0 104 0 104 104 0 8 0 namei 1024 6566 0 6566 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 7426 0 7424 3 2 1 2 1 8 0 plimitpl 152 116 0 92 2 0 2 2 0 8 1 sigapl 424 572 0 511 8 0 8 8 0 8 0 knotepl 120 356 0 0 11 0 11 11 0 8 0 kqueuepl 224 191 0 180 5 0 5 5 0 8 4 pipepl 344 114 0 86 3 0 3 3 0 8 0 fdescpl 528 549 0 511 3 0 3 3 0 8 0 filepl 160 2368 0 2149 15 0 15 15 0 8 5 lockfpl 104 60 0 57 1 0 1 1 0 8 0 lockfspl 48 22 0 19 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 35 0 11 1 0 1 1 0 8 0 ucredpl 104 307 0 288 1 0 1 1 0 8 0 zombiepl 144 513 0 511 1 0 1 1 0 8 0 processpl 1248 572 0 511 7 1 6 6 0 8 0 procpl 664 838 0 765 7 0 7 7 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 752 496 0 469 11 0 11 11 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 104 0 0 13 0 13 13 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 362 0 0 23 0 23 23 0 8 0 bufpl 280 2996 0 112 206 0 206 206 0 8 0 anonpl 32 6030 0 0 49 0 49 49 0 246 0 amapchunkpl 152 12537 0 11956 32 4 28 28 0 158 4 amappl16 200 2578 0 2550 14 3 11 14 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 194 0 184 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1162 0 1124 2 0 2 2 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 247 0 246 1 0 1 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 99 0 89 1 0 1 1 0 8 0 amappl6 120 176 0 173 1 0 1 1 0 8 0 amappl5 112 126 0 120 1 0 1 1 0 8 0 amappl4 104 361 0 345 1 0 1 1 0 8 0 amappl3 96 2145 0 2008 4 0 4 4 0 8 0 amappl2 88 628 0 575 2 0 2 2 0 8 0 amappl1 80 9223 0 8646 14 0 14 14 0 8 0 amappl 88 3503 0 3308 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 549 0 511 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 511 1 0 1 1 0 8 0 vmmpekpl 168 6200 0 6162 3 0 3 3 0 8 0 vmmpepl 168 42370 0 40214 101 0 101 101 0 357 3 vmsppl 488 548 0 511 7 1 6 6 0 8 0 rwobjpl 80 16558 0 13834 57 0 57 57 0 8 0 pdppl 4096 1106 0 1022 112 26 86 96 0 8 2 pvpl 32 12600 0 0 102 0 102 102 0 265 0 pmappl 256 548 0 511 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 29 8 0 8 8 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(ffffffff83332f45) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83917148) at mtx_enter_try+0x1da mtx_enter(ffffffff83917148) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fca088) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fca088) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805f3c6af8,0,ffff80003201ef98,ffff80003201ef7c,0,2,94321fd4066e8c91,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f030,ffff80003201f018) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003201f1b0,ffff80003201f1e8,ffff80003201f130) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd8069dbb5e8,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003201f340,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003201f340) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x782735ac84d0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299fdff0) 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: 0x73ea3adab570, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299fdff0) 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: 0x73ea3adab570, count: -3