panic: mtx 0xffffffff838cfe40: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *432778 5401 32767 0x10 0 0 syz-executor 485698 26167 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f2b27) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838cfe40) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff838cfe40) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800894d278) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c85d948,0,ffff80003c4323d8,ffff80003c4323bc,0,2,d406d31923e35ab6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4325f0,ffff80003c432628,ffff80003c432470,ffff80003c432458) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4325f0,ffff80003c432628,ffff80003c432570) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c48ab60,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c432780,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c432780) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710c539392f0, 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 0xffffffff838cfe40: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f2b27) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838cfe40) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff838cfe40) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800894d278) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c85d948,0,ffff80003c4323d8,ffff80003c4323bc,0,2,d406d31923e35ab6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4325f0,ffff80003c432628,ffff80003c432470,ffff80003c432458) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4325f0,ffff80003c432628,ffff80003c432570) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c48ab60,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c432780,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c432780) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710c539392f0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c432110 rbx 0xffffffff83828dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff8000fffe1c58 rax 0xffffffff83827ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xea6739cb95d3eb4e r11 0x4b2c4a9fd26ab615 r12 0xffffffff83828bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff81858c35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c432100 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=432778 pid=5401 tcnt=4 stat=onproc flags process=10 proc=0 runpri=64, usrpri=64, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe07d8,0xffff8000fffe02c8 process=0xffff8000337e2bb8 user=0xffff80003c42d000, vmspace=0xfffffd806c48ab60 estcpu=28, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18397 379030 51082 32767 2 0x10 syz-executor 18397 511048 51082 32767 2 0x4000010 syz-executor * 5401 432778 1098 32767 7 0x10 syz-executor 5401 396032 1098 32767 3 0x4000090 fsleep syz-executor 5401 271955 1098 32767 3 0x4000010 biowait syz-executor 5401 314401 1098 32767 3 0x4000090 fsleep syz-executor 59741 451408 15028 32767 2 0x10 syz-executor 59741 67999 15028 32767 3 0x4000090 ttyin syz-executor 59741 3188 15028 32767 3 0x4000090 ttyin syz-executor 8419 480362 61993 0 2 0x2 syz-executor 84525 355632 58439 32767 2 0x10 syz-executor 84525 496145 58439 32767 3 0x4000090 fsleep syz-executor 84525 249146 58439 32767 2 0x4000010 syz-executor 26167 264397 84249 32767 2 0x10 syz-executor 26167 485698 84249 32767 7 0x4000010 syz-executor 26167 111887 84249 32767 3 0x4000090 fsleep syz-executor 43183 227090 39624 32767 3 0x90 nanoslp syz-executor 43183 48546 39624 32767 2 0x4000010 syz-executor 43183 278569 39624 32767 3 0x4000090 fsleep syz-executor 40873 343002 0 0 3 0x14200 bored sosplice 51082 392046 38110 32767 3 0x90 nanoslp syz-executor 15028 11698 17190 32767 3 0x90 nanoslp syz-executor 1098 329912 75042 32767 3 0x90 nanoslp syz-executor 39624 77172 2716 32767 3 0x90 nanoslp syz-executor 84249 510452 36421 32767 2 0x10 syz-executor 58439 168151 1782 32767 3 0x90 nanoslp syz-executor 38110 88229 61993 0 3 0x82 wait syz-executor 2716 171054 61993 0 3 0x82 wait syz-executor 75042 301783 61993 0 3 0x82 wait syz-executor 17190 337500 61993 0 3 0x82 wait syz-executor 1782 364541 61993 0 3 0x82 wait syz-executor 36421 85987 61993 0 3 0x82 wait syz-executor 61993 268512 41864 0 3 0x82 nanoslp syz-executor 41864 54253 72659 0 3 0x10008a sigsusp ksh 72659 317790 35630 0 3 0x98 kqread sshd-session 35630 160635 48663 0 3 0x92 kqread sshd-session 64836 249842 1 0 3 0x100083 ttyin getty 48663 113622 1 0 3 0x88 kqread sshd 95726 18411 48174 73 3 0x1100090 kqread syslogd 48174 268918 1 0 3 0x100082 sbwait syslogd 8039 404540 1 0 3 0x100080 kqread resolvd 65277 92383 2150 77 3 0x100092 kqread dhcpleased 29977 442548 2150 77 3 0x100092 kqread dhcpleased 2150 411863 1 0 3 0x80 kqread dhcpleased 91205 97698 0 0 3 0x14200 bored smr 82171 470160 0 0 2 0x14200 zerothread 69183 67814 0 0 3 0x14200 aiodoned aiodoned 50140 321537 0 0 3 0x14200 syncer update 58519 232476 0 0 3 0x14200 cleaner cleaner 39748 218990 0 0 3 0x14200 reaper reaper 2220 125439 0 0 3 0x14200 pgdaemon pagedaemon 40027 500880 0 0 3 0x14200 bored viomb 43719 287063 0 0 3 0x40014200 acpi0 acpi0 13917 10645 0 0 3 0x40014200 idle1 88157 90640 0 0 3 0x14200 bored softnet3 13492 367425 0 0 3 0x14200 bored softnet2 22758 307868 0 0 3 0x14200 bored softnet1 62693 320270 0 0 3 0x14200 bored softnet0 37565 341748 0 0 3 0x14200 smrbar systqmp 98978 294492 0 0 3 0x14200 bored systq 71334 115648 0 0 3 0x14200 tmoslp softclockmp 73142 308109 0 0 3 0x40014200 tmoslp softclock 13187 476960 0 0 3 0x40014200 idle0 1 192996 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 (0xffffffff838cfe50) #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 5401 (syz-executor) thread 0xffff8000fffe1c58 (432778) exclusive rwlock uobjlk r = 0 (0xfffffd806ac1ca48) #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 (0xffffffff838cfe50) #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 5401 (syz-executor) thread 0xffff8000fffea018 (271955) exclusive rrwlock inode r = 0 (0xfffffd807cb069a8) #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 Process 37565 (systqmp) thread 0xffff8000ffffe520 (341748) shared rwlock systqmp r = 0 (0xffffffff83899358) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 10951K 10967K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 197 5K 7K 166960K 433 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 7 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 16K 166960K 93 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1477 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 22 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 21 74K 129K 166960K 447 0 sigio 0 0K 0K 166960K 5 0 proc 58 79K 115K 166960K 527 0 subproc 54 3K 4K 166960K 180 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 109 0 in_multi 77 5K 7K 166960K 104 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 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 377 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 243 136K 170K 166960K 5310 0 UVM aobj 54 2K 3K 166960K 55 0 pinsyscall 42 84K 116K 166960K 1461 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 9 0K 2K 166960K 27 0 temp 43 8677K 8742K 166960K 9769 0 kqueue 13 20K 25K 166960K 84 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 54 0 51 1 0 1 1 0 8 0 rtentry 176 116 0 26 6 0 6 6 0 8 0 unpcb 144 421 0 401 6 4 2 6 0 8 1 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpcb 736 373 0 365 16 9 7 13 0 8 6 arp 128 19 0 5 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 7 0 3 1 0 1 1 0 8 0 inpcb 328 679 0 667 14 7 7 12 0 8 6 ip6q 72 2 0 2 1 0 1 1 0 8 1 ip6af 40 4 0 4 1 0 1 1 0 8 1 nd6 144 28 0 8 1 0 1 1 0 8 0 kcovpl 48 20 0 14 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 470 0 55 29 0 29 29 0 8 2 art_table 40 471 0 55 5 0 5 5 0 8 0 art_node 32 116 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 52 0 1 2 0 2 2 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1930 0 409 96 0 96 96 0 8 0 ffsino 288 1930 0 409 109 0 109 109 0 8 0 nchpl 144 2496 0 804 63 0 63 63 0 8 0 uvmvnodes 80 2119 0 0 44 0 44 44 0 8 0 vnodes 216 2119 0 0 118 0 118 118 0 8 0 namei 1024 8389 0 8389 3 2 1 2 0 8 1 percpumem 16 49 0 2 1 0 1 1 0 8 0 kstatmem 264 24 0 4 2 0 2 2 0 8 0 scxspl 216 8138 0 8137 10 7 3 8 1 8 2 plimitpl 152 159 0 137 2 0 2 2 0 8 1 sigapl 424 698 0 646 8 0 8 8 0 8 0 knotepl 120 321 0 0 10 0 10 10 0 8 0 kqueuepl 224 163 0 154 1 0 1 1 0 8 0 pipepl 336 221 0 194 4 1 3 3 0 8 0 fdescpl 520 679 0 646 4 0 4 4 0 8 0 filepl 160 3997 0 3798 18 4 14 18 0 8 5 lockfpl 104 78 0 75 1 0 1 1 0 8 0 lockfspl 48 33 0 30 1 0 1 1 0 8 0 sessionpl 144 37 0 23 1 0 1 1 0 8 0 pgrppl 48 64 0 43 1 0 1 1 0 8 0 ucredpl 104 447 0 430 1 0 1 1 0 8 0 zombiepl 144 646 0 646 2 1 1 1 0 8 1 processpl 1240 698 0 646 5 0 5 5 0 8 0 procpl 656 1135 0 1071 7 0 7 7 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 1158 0 1122 26 17 9 21 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 52 0 0 7 0 7 7 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 289 0 0 19 0 19 19 0 8 0 bufpl 280 2684 0 116 184 0 184 184 0 8 0 anonpl 32 9930 0 0 81 1 80 80 0 246 0 amapchunkpl 152 16908 0 16308 33 3 30 32 0 158 6 amappl16 200 2344 0 2262 18 1 17 18 0 8 4 amappl15 192 3 0 3 2 2 0 1 0 8 0 amappl14 184 106 0 96 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1272 0 1240 3 1 2 3 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 251 0 251 2 2 0 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 94 0 84 1 0 1 1 0 8 0 amappl6 120 165 0 162 2 1 1 1 0 8 0 amappl5 112 118 0 112 1 0 1 1 0 8 0 amappl4 104 289 0 271 1 0 1 1 0 8 0 amappl3 96 2970 0 2845 4 0 4 4 0 8 0 amappl2 88 619 0 564 2 0 2 2 0 8 0 amappl1 80 9851 0 9292 15 1 14 14 0 8 1 amappl 88 4606 0 4425 6 0 6 6 0 92 1 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 54 0 1 1 0 1 1 0 8 0 uaddrrnd 24 679 0 646 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 679 0 646 1 0 1 1 0 8 0 vmmpekpl 168 7695 0 7648 3 0 3 3 0 8 0 vmmpepl 168 50194 0 48180 118 2 116 116 0 357 12 vmsppl 480 678 0 646 7 1 6 6 0 8 0 rwobjpl 72 18023 0 14957 59 0 59 59 0 8 0 pdppl 4096 1366 0 1292 125 43 82 100 0 8 8 pvpl 32 18836 0 0 153 1 152 152 0 265 0 pmappl 256 678 0 646 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 439 0 58 12 0 12 12 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(ffffffff833f2b27) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838cfe40) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff838cfe40) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800894d278) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800894d278) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c85d948,0,ffff80003c4323d8,ffff80003c4323bc,0,2,d406d31923e35ab6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4325f0,ffff80003c432628,ffff80003c432470,ffff80003c432458) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4325f0,ffff80003c432628,ffff80003c432570) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c48ab60,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c432780,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c432780) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710c539392f0, 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 __mp_lock(ffffffff8395ba20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395ba20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_closefile(fffffd806c950528,ffff8000fffebc48) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd806c950528,ffff8000fffebc48) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c950528,ffff8000fffebc48) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80002a3c0b90) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3c0b90) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd2217ff3540, count: 6 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 __mp_lock(ffffffff8395ba20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395ba20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vn_closefile(fffffd806c950528,ffff8000fffebc48) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd806c950528,ffff8000fffebc48) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c950528,ffff8000fffebc48) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff80002a3c0b90) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3c0b90) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd2217ff3540, count: -9