panic: mtx 0xffffffff839c5d90: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *356532 88 32767 0x10 0 0 syz-executor 515512 88 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833eeca8) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c5d90) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839c5d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800804f210) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c05bce8,0,ffff80003c47f228,ffff80003c47f20c,0,2,50dc6d096de4e7e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c47f440,ffff80003c47f478,ffff80003c47f2c0,ffff80003c47f2a8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c47f440,ffff80003c47f478,ffff80003c47f3c0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c3b2988,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c47f5d0,200000000200) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c47f5d0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a1079e937c0, 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 0xffffffff839c5d90: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833eeca8) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c5d90) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839c5d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800804f210) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c05bce8,0,ffff80003c47f228,ffff80003c47f20c,0,2,50dc6d096de4e7e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c47f440,ffff80003c47f478,ffff80003c47f2c0,ffff80003c47f2a8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c47f440,ffff80003c47f478,ffff80003c47f3c0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c3b2988,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c47f5d0,200000000200) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c47f5d0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a1079e937c0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c47ef60 rbx 0xffffffff8386fdd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c4347e0 rax 0xffffffff8386eff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x86431d295cd99366 r11 0xb397fa7fa27bd418 r12 0xffffffff8386fbd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff82987b05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c47ef50 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=356532 pid=88 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=0xffff80003c438a68,0xffff80003c434d10 process=0xffff80003a411858 user=0xffff80003c47a000, vmspace=0xfffffd806c3b2988 estcpu=36, cpticks=2, pctcpu=0.0, user=2, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 88 356532 9582 32767 7 0x10 syz-executor 88 143161 9582 32767 3 0x4000010 uobjlk syz-executor 88 417576 9582 32767 3 0x4000010 biowait syz-executor 88 515512 9582 32767 7 0x4000010 syz-executor 66079 84234 35346 32767 3 0x90 nanoslp syz-executor 66079 478320 35346 32767 3 0x4000090 netcon syz-executor 66079 266971 35346 32767 3 0x4000090 fsleep syz-executor 92412 74553 66375 32767 3 0x90 nanoslp syz-executor 92412 143564 66375 32767 3 0x4000090 ttyin syz-executor 92412 140877 66375 32767 3 0x4000090 fsleep syz-executor 99485 116678 2701 32767 3 0x90 nanoslp syz-executor 99485 206967 2701 32767 3 0x4000090 sbwait syz-executor 99485 39918 2701 32767 3 0x4000090 fsleep syz-executor 99485 332700 2701 32767 3 0x4000090 fsleep syz-executor 33611 16316 10085 32767 3 0x90 nanoslp syz-executor 33611 401642 10085 32767 3 0x4000090 sbwait syz-executor 33611 60324 10085 32767 3 0x4000090 fsleep syz-executor 88115 508284 98402 32767 3 0x90 nanoslp syz-executor 88115 182701 98402 32767 3 0x4000090 kqread syz-executor 88115 234564 98402 32767 3 0x4000090 fsleep syz-executor 18044 104306 0 0 3 0x14200 bored sosplice 35346 50452 78578 32767 3 0x90 nanoslp syz-executor 9582 266810 40239 32767 3 0x90 nanoslp syz-executor 38795 252334 716 32767 3 0x90 nanoslp syz-executor 2701 236565 62560 32767 3 0x90 nanoslp syz-executor 10085 2773 39335 32767 3 0x90 nanoslp syz-executor 98402 153223 69415 32767 3 0x90 nanoslp syz-executor 66375 346937 61537 32767 3 0x90 nanoslp syz-executor 99111 218402 65806 32767 3 0x90 nanoslp syz-executor 65806 282365 18855 0 3 0x82 wait syz-executor 39335 474488 18855 0 3 0x82 wait syz-executor 40239 50922 18855 0 3 0x82 wait syz-executor 716 13486 18855 0 3 0x82 wait syz-executor 61537 149737 18855 0 3 0x82 wait syz-executor 69415 234258 18855 0 3 0x82 wait syz-executor 78578 19360 18855 0 3 0x82 wait syz-executor 62560 285822 18855 0 3 0x82 wait syz-executor 18855 448332 36424 0 3 0x82 kqread syz-executor 36424 206258 12622 0 3 0x10008a sigsusp ksh 12622 17986 39604 0 3 0x98 kqread sshd-session 39604 284719 36296 0 3 0x92 kqread sshd-session 78075 188147 1 0 3 0x100083 ttyin getty 36296 469060 1 0 3 0x88 kqread sshd 60068 64460 70315 73 3 0x1100090 kqread syslogd 70315 272771 1 0 3 0x100082 sbwait syslogd 73139 305237 1 0 3 0x100080 kqread resolvd 2522 464575 49108 77 3 0x100092 kqread dhcpleased 37019 458550 49108 77 3 0x100092 kqread dhcpleased 49108 238802 1 0 3 0x80 kqread dhcpleased 1068 523260 0 0 3 0x14200 bored smr 43494 404838 0 0 3 0x14200 pgzero zerothread 40230 352850 0 0 3 0x14200 aiodoned aiodoned 12349 159952 0 0 3 0x14200 syncer update 59280 44077 0 0 3 0x14200 cleaner cleaner 88146 37991 0 0 3 0x14200 reaper reaper 15434 6575 0 0 3 0x14200 pgdaemon pagedaemon 44169 308897 0 0 3 0x14200 bored viomb 86019 92320 0 0 3 0x40014200 acpi0 acpi0 25401 107067 0 0 3 0x40014200 idle1 53933 291475 0 0 3 0x14200 bored softnet3 39210 356166 0 0 3 0x14200 bored softnet2 40244 260610 0 0 3 0x14200 bored softnet1 69442 490803 0 0 3 0x14200 bored softnet0 68675 30312 0 0 3 0x14200 bored systqmp 40935 513750 0 0 3 0x14200 bored systq 55076 295279 0 0 3 0x14200 tmoslp softclockmp 62107 458751 0 0 3 0x40014200 tmoslp softclock 20113 431742 0 0 3 0x40014200 idle0 1 127011 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 (0xffffffff839c5da0) #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+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 CPU 1: exclusive mutex &pr->ps_mtx r = 0 (0xffff80003a411978) #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 lim_read_enter+0x65 sys/kern/kern_resource.c:780 #4 sys_mmap+0x7ef lim_cur sys/sys/resourcevar.h:-1 [inline] #4 sys_mmap+0x7ef sys/uvm/uvm_mmap.c:411 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 #6 Xsyscall+0x128 Process 88 (syz-executor) thread 0xffff80003c4347e0 (356532) exclusive rwlock uobjlk r = 0 (0xfffffd805ee87a88) #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+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839c5da0) #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+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 Process 88 (syz-executor) thread 0xffff80003c434550 (417576) exclusive rrwlock inode r = 0 (0xfffffd8064384f80) #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:742 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 10956K 10967K 166960K 11270 0 pcb 17 14K 16K 166960K 19 0 rtable 239 6K 7K 166960K 419 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 7 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 35 0 iov 1 8K 20K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1428 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 125K 166960K 298 0 sigio 0 0K 0K 166960K 3 0 proc 61 91K 127K 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 164 0 in_multi 99 7K 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 417 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 273 168K 183K 166960K 4084 0 UVM aobj 7 2K 4K 166960K 9 0 pinsyscall 47 94K 112K 166960K 1295 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 2K 166960K 27 0 temp 39 8675K 8741K 166960K 4254 0 kqueue 13 20K 29K 166960K 57 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 120 115 0 47 3 0 3 3 0 8 0 rtentry 176 113 0 2 6 0 6 6 0 8 0 unpcb 144 193 0 173 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 86 0 75 2 0 2 2 0 8 1 arp 128 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 6 0 2 1 0 1 1 0 8 0 inpcb 328 421 0 403 12 2 10 12 0 8 8 nd6 144 26 0 1 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 256 456 0 1 29 0 29 29 0 8 0 art_table 32 457 0 1 4 0 4 4 0 8 0 art_node 16 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 9 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1834 0 327 95 0 95 95 0 8 0 ffsino 288 1834 0 327 108 0 108 108 0 8 0 nchpl 144 2244 0 567 63 0 63 63 0 8 0 uvmvnodes 80 1915 0 0 40 0 40 40 0 8 0 vnodes 216 1915 0 0 107 0 107 107 0 8 0 namei 1024 6858 0 6858 1 0 1 1 0 8 1 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 6770 0 6768 3 2 1 2 1 8 0 plimitpl 152 62 0 35 2 0 2 2 0 8 0 sigapl 424 570 0 513 8 0 8 8 0 8 0 knotepl 120 305 0 0 10 0 10 10 0 8 0 kqueuepl 224 144 0 131 5 0 5 5 0 8 4 pipepl 336 109 0 82 3 0 3 3 0 8 0 fdescpl 520 551 0 513 4 0 4 4 0 8 0 filepl 160 2853 0 2556 15 0 15 15 0 8 2 lockfpl 104 63 0 59 1 0 1 1 0 8 0 lockfspl 48 25 0 21 1 0 1 1 0 8 0 sessionpl 144 22 0 6 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 471 0 452 1 0 1 1 0 8 0 zombiepl 144 515 0 513 1 0 1 1 0 8 0 processpl 1240 570 0 513 5 0 5 5 0 8 0 procpl 656 824 0 753 7 0 7 7 0 8 0 sosppl 168 3 0 2 1 0 1 1 0 8 0 sockpl 728 730 0 624 15 4 11 15 0 8 1 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 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 58 0 0 8 0 8 8 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 18 0 18 18 0 8 0 bufpl 280 2421 0 112 165 0 165 165 0 8 0 anonpl 32 11366 0 0 92 0 92 92 0 246 0 amapchunkpl 152 13185 0 12557 36 0 36 36 0 158 9 amappl16 200 2070 0 2048 25 13 12 25 0 8 8 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 102 0 92 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1147 0 1109 3 0 3 3 0 8 1 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 89 0 79 1 0 1 1 0 8 0 amappl6 120 180 0 177 1 0 1 1 0 8 0 amappl5 112 113 0 107 1 0 1 1 0 8 0 amappl4 104 284 0 268 1 0 1 1 0 8 0 amappl3 96 2234 0 2088 4 0 4 4 0 8 0 amappl2 88 599 0 542 2 0 2 2 0 8 0 amappl1 80 8525 0 7943 14 0 14 14 0 8 0 amappl 88 3437 0 3230 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 2 1 0 1 1 0 8 0 uaddrrnd 24 551 0 513 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 551 0 513 1 0 1 1 0 8 0 vmmpekpl 168 5939 0 5908 2 0 2 2 0 8 0 vmmpepl 168 40776 0 38582 110 0 110 110 0 357 10 vmsppl 480 550 0 513 7 1 6 6 0 8 0 rwobjpl 72 15528 0 12729 56 1 55 55 0 8 1 pdppl 4096 1110 0 1026 112 26 86 98 0 8 2 pvpl 32 18273 0 0 148 0 148 148 0 265 0 pmappl 256 550 0 513 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 406 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(ffffffff833eeca8) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c5d90) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff839c5d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800804f210) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800804f210) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c05bce8,0,ffff80003c47f228,ffff80003c47f20c,0,2,50dc6d096de4e7e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c47f440,ffff80003c47f478,ffff80003c47f2c0,ffff80003c47f2a8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c47f440,ffff80003c47f478,ffff80003c47f3c0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c3b2988,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c47f5d0,200000000200) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c47f5d0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a1079e937c0, 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_acquire_count(fffffd806c3b29b8,fffffd806c3b2ae8) at __mp_acquire_count+0xb sys/kern/kern_lock.c:220 vm_map_lock_ln(fffffd806c3b2988,fffffd806c3d1c20,0) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5161 uvm_mapanon(fffffd806c3b2988,ffff80003c491720,400000,0,3090713) at uvm_mapanon+0x292 sys/uvm/uvm_map.c:-1 uvm_mmapanon(fffffd806c3b2988,ffff80003c491720,400000,3,7,5012,918a0c555a40c101,5012) at uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 sys_mmap(ffff80003c435220,ffff80003c491890,ffff80003c4917e0) at sys_mmap+0xa96 sys/uvm/uvm_mmap.c:426 syscall(ffff80003c491890) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c491890) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f7ae085c70, count: 5 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_acquire_count(fffffd806c3b29b8,fffffd806c3b2ae8) at __mp_acquire_count+0xb sys/kern/kern_lock.c:220 vm_map_lock_ln(fffffd806c3b2988,fffffd806c3d1c20,0) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5161 uvm_mapanon(fffffd806c3b2988,ffff80003c491720,400000,0,3090713) at uvm_mapanon+0x292 sys/uvm/uvm_map.c:-1 uvm_mmapanon(fffffd806c3b2988,ffff80003c491720,400000,3,7,5012,918a0c555a40c101,5012) at uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 sys_mmap(ffff80003c435220,ffff80003c491890,ffff80003c4917e0) at sys_mmap+0xa96 sys/uvm/uvm_mmap.c:426 syscall(ffff80003c491890) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c491890) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f7ae085c70, count: -10