login: panic: mtx 0xffffffff839125e0: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *254586 48591 32767 0x10 0 0 syz-executor 19414 14148 32767 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e2bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839125e0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839125e0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008816908) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069c8b840,0,ffff80003900db98,ffff80003900db74,0,2,3cec4e1cad61b0ce,ffff80003900ddf0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dc20,ffff80003900dc28) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dd30) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd800aafa988,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003900df40,200000000080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003900df40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b9d19be97e0, 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 0xffffffff839125e0: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e2bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839125e0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839125e0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008816908) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069c8b840,0,ffff80003900db98,ffff80003900db74,0,2,3cec4e1cad61b0ce,ffff80003900ddf0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dc20,ffff80003900dc28) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dd30) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd800aafa988,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003900df40,200000000080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003900df40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b9d19be97e0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003900d8e0 rbx 0xffffffff838abdcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c4502b8 rax 0xffffffff838aaff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xae2cf50e488ba699 r11 0x2805cbf53c48da93 r12 0xffffffff838abbd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff815c1765 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003900d8d0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=254586 pid=48591 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=0xffff80003c4507d8,0xffff80003c450a78 process=0xffff80003c42aeb0 user=0xffff800039008000, vmspace=0xfffffd800aafa988 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *48591 254586 95364 32767 7 0x10 syz-executor 48591 16526 95364 32767 3 0x4000090 fsleep syz-executor 48591 87191 95364 32767 3 0x4000010 biowait syz-executor 48591 280501 95364 32767 3 0x4000090 fsleep syz-executor 83932 114939 17214 32767 2 0x10 syz-executor 83932 270143 17214 32767 3 0x4000090 fsleep syz-executor 14148 19414 6272 32767 7 0x10 syz-executor 14148 445788 6272 32767 3 0x4000090 sbwait syz-executor 14799 44605 27888 32767 2 0x10 syz-executor 14799 151894 27888 32767 3 0x4000090 ttyretype syz-executor 8301 115675 80980 32767 3 0x90 nanoslp syz-executor 8301 53417 80980 32767 3 0x4000090 msgwait syz-executor 8301 127772 80980 32767 3 0x4000090 fsleep syz-executor 62708 405656 30466 32767 3 0x90 nanoslp syz-executor 62708 49428 30466 32767 3 0x4000090 ttyin syz-executor 62708 488119 30466 32767 3 0x4000090 fsleep syz-executor 94941 13179 0 0 3 0x14200 bored sosplice 477 481239 7059 0 3 0x100082 sbwait arp 7059 262811 85706 0 3 0x10008a sigsusp sh 80980 168312 62351 32767 3 0x90 nanoslp syz-executor 53585 84290 46489 32767 3 0x90 nanoslp syz-executor 30466 465199 76350 32767 3 0x90 nanoslp syz-executor 85706 14999 82759 0 3 0x80 wait syz-executor 17214 13575 7672 32767 3 0x90 nanoslp syz-executor 27888 180338 62411 32767 3 0x90 nanoslp syz-executor 95364 81393 40949 32767 3 0x90 nanoslp syz-executor 6272 80594 79818 32767 3 0x90 nanoslp syz-executor 7672 44089 59041 0 3 0x82 wait syz-executor 76350 350 59041 0 3 0x82 wait syz-executor 82759 417466 59041 0 3 0x82 wait syz-executor 62411 267635 59041 0 3 0x82 wait syz-executor 46489 396507 59041 0 3 0x82 wait syz-executor 40949 455656 59041 0 3 0x82 wait syz-executor 79818 504901 59041 0 3 0x82 wait syz-executor 62351 468191 59041 0 3 0x82 wait syz-executor 59041 187074 54763 0 3 0x82 kqread syz-executor 54763 442006 2717 0 3 0x10008a sigsusp ksh 2717 213304 43979 0 3 0x98 kqread sshd-session 43979 348312 48555 0 3 0x92 kqread sshd-session 85176 298436 1 0 3 0x100083 ttyin getty 48555 198366 1 0 3 0x88 kqread sshd 99055 492118 29940 73 3 0x1100090 kqread syslogd 29940 341693 1 0 3 0x100082 sbwait syslogd 27729 121571 1 0 3 0x100080 kqread resolvd 18939 521736 56611 77 3 0x100092 kqread dhcpleased 60092 440968 56611 77 3 0x100092 kqread dhcpleased 56611 480870 1 0 3 0x80 kqread dhcpleased 36623 149593 0 0 3 0x14200 bored smr 53526 346236 0 0 2 0x14200 zerothread 37438 145880 0 0 3 0x14200 aiodoned aiodoned 71856 467710 0 0 3 0x14200 syncer update 91084 274673 0 0 3 0x14200 cleaner cleaner 2880 316247 0 0 3 0x14200 reaper reaper 87012 314053 0 0 3 0x14200 pgdaemon pagedaemon 74040 339510 0 0 3 0x14200 bored viomb 72499 236697 0 0 3 0x40014200 acpi0 acpi0 38584 185006 0 0 3 0x40014200 idle1 64134 183927 0 0 3 0x14200 bored softnet3 48595 522004 0 0 3 0x14200 bored softnet2 49748 143432 0 0 3 0x14200 bored softnet1 85107 458920 0 0 3 0x14200 bored softnet0 72710 306556 0 0 3 0x14200 bored systqmp 32357 11333 0 0 3 0x14200 bored systq 84796 56104 0 0 3 0x14200 tmoslp softclockmp 55498 241980 0 0 3 0x40014200 tmoslp softclock 94457 155696 0 0 3 0x40014200 idle0 1 94542 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 (0xffffffff839125f0) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 48591 (syz-executor) thread 0xffff80003c4502b8 (254586) exclusive rwlock uobjlk r = 0 (0xfffffd806a28cd60) #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+0x3ea sys/kern/kern_rwlock.c:316 #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+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 (0xffffffff839125f0) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 48591 (syz-executor) thread 0xffff80003c451c58 (87191) exclusive rrwlock inode r = 0 (0xfffffd806c077b00) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2920 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 10954K 10965K 166960K 11266 0 pcb 17 12K 12K 166960K 17 0 rtable 226 6K 6K 166960K 343 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 1 4K 12K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1362 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 27 101K 125K 166960K 404 0 proc 58 79K 127K 166960K 508 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 69 0 in_multi 89 6K 6K 166960K 104 0 ether_multi 1 0K 0K 166960K 3 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 410 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 259 154K 176K 166960K 5260 0 UVM aobj 12 2K 2K 166960K 14 0 pinsyscall 49 98K 113K 166960K 1425 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 1K 166960K 25 0 temp 45 8680K 8744K 166960K 4826 0 kqueue 14 22K 28K 166960K 64 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 52 0 48 1 0 1 1 0 8 0 rtentry 176 107 0 1 5 0 5 5 0 8 0 unpcb 144 561 0 536 6 0 6 6 0 8 5 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 282 0 241 6 0 6 6 0 8 1 arp 128 19 0 0 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 135 0 132 1 0 1 1 0 8 0 inpcb 384 636 0 590 8 0 8 8 0 8 3 nd6 144 23 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 256 423 0 0 27 0 27 27 0 8 0 art_table 32 424 0 0 4 0 4 4 0 8 0 art_node 16 106 0 9 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1918 0 413 95 0 95 95 0 8 0 ffsino 288 1918 0 413 108 0 108 108 0 8 0 nchpl 144 2484 0 808 63 0 63 63 0 8 0 uvmvnodes 80 1999 0 0 41 0 41 41 0 8 0 vnodes 216 1999 0 0 112 0 112 112 0 8 0 namei 1024 7745 0 7745 1 0 1 1 0 8 1 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 7676 0 7674 3 1 2 2 1 8 1 plimitpl 152 109 0 83 2 0 2 2 0 8 0 sigapl 424 683 0 625 8 0 8 8 0 8 0 futexpl 64 3631 0 3626 1 0 1 1 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 224 86 0 76 1 0 1 1 0 8 0 pipepl 336 121 0 94 3 0 3 3 0 8 0 fdescpl 520 664 0 625 4 0 4 4 0 8 0 filepl 160 3307 0 3042 18 0 18 18 0 8 6 lockfpl 104 92 0 88 1 0 1 1 0 8 0 lockfspl 48 31 0 27 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 40 0 16 1 0 1 1 0 8 0 ucredpl 104 369 0 351 1 0 1 1 0 8 0 zombiepl 144 626 0 625 1 0 1 1 0 8 0 processpl 1192 683 0 625 5 0 5 5 0 8 0 procpl 656 1138 0 1070 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 728 1255 0 1181 22 11 11 22 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 24 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 14 0 14 14 0 8 0 bufpl 280 2550 0 117 174 0 174 174 0 8 0 anonpl 32 7777 0 0 63 0 63 63 0 246 0 amapchunkpl 152 16920 0 16352 34 0 34 34 0 158 10 amappl16 200 2477 0 2450 17 7 10 14 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 112 0 101 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1262 0 1222 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 77 0 76 1 0 1 1 0 8 0 amappl7 128 98 0 87 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 117 0 111 1 0 1 1 0 8 0 amappl4 104 306 0 289 1 0 1 1 0 8 0 amappl3 96 2980 0 2846 4 0 4 4 0 8 0 amappl2 88 656 0 598 2 0 2 2 0 8 0 amappl1 80 10440 0 9825 17 0 17 17 0 8 1 amappl 88 4552 0 4364 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 664 0 625 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 664 0 625 1 0 1 1 0 8 0 vmmpekpl 168 7406 0 7372 2 0 2 2 0 8 0 vmmpepl 168 49802 0 47598 114 0 114 114 0 357 12 vmsppl 480 663 0 625 6 0 6 6 0 8 0 rwobjpl 72 18451 0 15533 58 0 58 58 0 8 2 pdppl 4096 1336 0 1250 114 24 90 98 0 8 4 pvpl 32 16901 0 0 138 1 137 138 0 265 0 pmappl 256 663 0 625 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 400 0 26 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(ffffffff833e2bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839125e0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839125e0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008816908) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008816908) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069c8b840,0,ffff80003900db98,ffff80003900db74,0,2,3cec4e1cad61b0ce,ffff80003900ddf0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dc20,ffff80003900dc28) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003900ddb8,ffff80003900ddf0,ffff80003900dd30) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd800aafa988,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003900df40,200000000080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003900df40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b9d19be97e0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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: 0x7255f04058e0, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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: 0x7255f04058e0, count: -3