panic: mtx 0xffffffff83a0ce10: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 387076 70600 32767 0x10 0 1 syz-executor *522661 69386 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833db35b) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a0ce10) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a0ce10) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087cf868) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b1dd030,0,ffff80003c45b3d8,ffff80003c45b3b4,0,2,7e8a2499d1f01dd5,ffff80003c45b630) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b460,ffff80003c45b468) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b570) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806b5fd3f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45b780,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45b780) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ef2752067c0, 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 0xffffffff83a0ce10: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833db35b) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a0ce10) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a0ce10) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087cf868) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b1dd030,0,ffff80003c45b3d8,ffff80003c45b3b4,0,2,7e8a2499d1f01dd5,ffff80003c45b630) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b460,ffff80003c45b468) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b570) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806b5fd3f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45b780,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45b780) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ef2752067c0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c45b120 rbx 0xffffffff83849dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c45d218 rax 0xffffffff83848ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe3796ee2e63ba0fa r11 0xd4f5c8112fd0a985 r12 0xffffffff83849bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff8177e4c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45b110 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=522661 pid=69386 tcnt=4 stat=onproc flags process=10 proc=0 runpri=53, usrpri=53, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c45dc58,0xffff80003c45cf98 process=0xffff80002a3d4018 user=0xffff80003c456000, vmspace=0xfffffd806b5fd3f0 estcpu=3, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70600 387076 63174 32767 7 0x10 syz-executor 70600 9281 63174 32767 3 0x4000090 fsleep syz-executor 79720 121273 56195 32767 2 0x10 syz-executor 79720 255642 56195 32767 3 0x4000090 fsleep syz-executor 41858 142254 7691 0 2 0x40 syz-executor 64854 424587 428 32767 2 0x10 syz-executor 64854 489925 428 32767 3 0x4000090 fsleep syz-executor 64854 379747 428 32767 3 0x4000090 fsleep syz-executor *69386 522661 65888 32767 7 0x10 syz-executor 69386 274197 65888 32767 3 0x4000090 fsleep syz-executor 69386 143648 65888 32767 3 0x4000010 biowait syz-executor 69386 399049 65888 32767 3 0x4000090 fsleep syz-executor 88196 1565 57830 0 2 0x2 arp 57830 50371 22772 0 3 0x10008a sigsusp sh 54175 285167 88143 32767 3 0x90 nanoslp syz-executor 54175 188782 88143 32767 3 0x4000090 fifor syz-executor 54175 46048 88143 32767 3 0x4000090 fsleep syz-executor 99121 401982 1901 32767 2 0x10 syz-executor 99121 222816 1901 32767 3 0x4000090 fsleep syz-executor 65888 85215 47269 32767 3 0x90 nanoslp syz-executor 56195 343412 69856 32767 3 0x90 nanoslp syz-executor 63174 304949 15630 32767 3 0x90 nanoslp syz-executor 88143 160212 17819 32767 3 0x90 nanoslp syz-executor 22772 341333 63170 0 3 0x80 wait syz-executor 428 264485 59269 32767 3 0x90 nanoslp syz-executor 7691 44725 67522 0 3 0x80 ppwait syz-executor 1901 493180 68276 32767 3 0x90 nanoslp syz-executor 67522 72959 90969 0 3 0x82 wait syz-executor 63170 494331 90969 0 3 0x82 wait syz-executor 47269 266085 90969 0 3 0x82 wait syz-executor 68276 432442 90969 0 3 0x82 wait syz-executor 69856 128842 90969 0 3 0x82 wait syz-executor 17819 75740 90969 0 3 0x82 wait syz-executor 15630 495445 90969 0 3 0x82 wait syz-executor 59269 431243 90969 0 3 0x82 wait syz-executor 90969 497114 70316 0 3 0x82 kqread syz-executor 70316 300435 29771 0 3 0x10008a sigsusp ksh 29771 208764 9513 0 3 0x98 kqread sshd-session 9513 155677 33638 0 3 0x92 kqread sshd-session 83546 428028 1 0 3 0x100083 ttyin getty 33638 89487 1 0 3 0x88 kqread sshd 20282 253406 6788 73 3 0x1100090 kqread syslogd 6788 491252 1 0 3 0x100082 sbwait syslogd 32522 52560 1 0 3 0x100080 kqread resolvd 18478 287325 8795 77 3 0x100092 kqread dhcpleased 24257 229803 8795 77 3 0x100092 kqread dhcpleased 8795 161555 1 0 3 0x80 kqread dhcpleased 51042 59767 0 0 3 0x14200 bored smr 95114 138812 0 0 2 0x14200 zerothread 56865 298455 0 0 3 0x14200 aiodoned aiodoned 4313 257164 0 0 3 0x14200 syncer update 21671 459816 0 0 3 0x14200 cleaner cleaner 67505 290546 0 0 3 0x14200 reaper reaper 61975 511108 0 0 3 0x14200 pgdaemon pagedaemon 7316 425716 0 0 3 0x14200 bored viomb 69269 296424 0 0 3 0x40014200 acpi0 acpi0 51542 486264 0 0 3 0x40014200 idle1 32027 124323 0 0 3 0x14200 bored softnet3 91912 493588 0 0 3 0x14200 bored softnet2 25060 155673 0 0 3 0x14200 bored softnet1 67092 335584 0 0 3 0x14200 bored softnet0 62157 289929 0 0 3 0x14200 bored systqmp 63514 340687 0 0 3 0x14200 bored systq 81095 361097 0 0 3 0x14200 tmoslp softclockmp 48735 418388 0 0 3 0x40014200 tmoslp softclock 75979 375065 0 0 3 0x40014200 idle0 1 283799 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 (0xffffffff83a0ce20) #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 69386 (syz-executor) thread 0xffff80003c45d218 (522661) exclusive rwlock uobjlk r = 0 (0xfffffd806e249378) #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 (0xffffffff83a0ce20) #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 69386 (syz-executor) thread 0xffff80003c45d738 (274197) exclusive rwlock futexpl r = 0 (0xffffffff83912568) #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 pool_get+0x10b sys/kern/subr_pool.c:583 #3 futex_get+0x309 sys/kern/sys_futex.c:171 #4 futex_wait+0x328 sys/kern/sys_futex.c:-1 #5 sys_futex+0x149 sys/kern/sys_futex.c:101 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock futex r = 0 (0xffffffff837b5ca8) #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 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 69386 (syz-executor) thread 0xffff80002a2c4020 (143648) exclusive rrwlock inode r = 0 (0xfffffd806b44d440) #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 10179 10953K 10965K 166960K 11256 0 pcb 17 12K 12K 166960K 17 0 rtable 216 6K 6K 166960K 315 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1352 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 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 27 101K 125K 166960K 152 0 proc 58 79K 140K 166960K 469 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 2 0 in_multi 89 6K 6K 166960K 89 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 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 332 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 240 152K 164K 166960K 2695 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 48 96K 112K 166960K 1137 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 25 1K 1K 166960K 25 0 temp 34 8674K 8738K 166960K 3621 0 kqueue 13 20K 20K 166960K 22 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 32 0 28 1 0 1 1 0 8 0 rtentry 176 102 0 1 5 0 5 5 0 8 0 unpcb 144 49 0 25 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 23 0 18 1 0 1 1 0 8 0 arp 128 17 0 0 1 0 1 1 0 8 0 inpcb 384 85 0 73 2 0 2 2 0 8 0 nd6 144 20 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 256 410 0 0 26 0 26 26 0 8 0 art_table 32 411 0 0 4 0 4 4 0 8 0 art_node 16 101 0 9 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1561 0 57 94 0 94 94 0 8 0 ffsino 288 1561 0 57 108 0 108 108 0 8 0 nchpl 144 1760 0 80 63 0 63 63 0 8 0 uvmvnodes 80 1642 0 0 34 0 34 34 0 8 0 vnodes 216 1642 0 0 92 0 92 92 0 8 0 namei 1024 5067 0 5067 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 5668 0 5666 3 1 2 2 1 8 1 plimitpl 152 38 0 14 2 0 2 2 0 8 1 sigapl 424 424 0 367 8 0 8 8 0 8 1 futexpl 64 256 0 248 1 0 1 1 0 8 0 knotepl 120 58 0 0 2 0 2 2 0 8 0 kqueuepl 224 22 0 11 1 0 1 1 0 8 0 pipepl 336 95 0 68 3 0 3 3 0 8 0 fdescpl 520 406 0 367 4 0 4 4 0 8 0 filepl 160 1352 0 1133 10 0 10 10 0 8 0 lockfpl 104 15 0 12 1 0 1 1 0 8 0 lockfspl 48 6 0 3 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 87 0 70 1 0 1 1 0 8 0 zombiepl 144 367 0 367 1 0 1 1 0 8 1 processpl 1192 424 0 367 5 0 5 5 0 8 0 procpl 656 454 0 387 6 0 6 6 0 8 0 sockpl 728 166 0 126 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 167 0 0 11 0 11 11 0 8 0 bufpl 280 2242 0 117 152 0 152 152 0 8 0 anonpl 32 3610 0 0 30 0 30 30 0 246 0 amapchunkpl 152 7744 0 7224 20 0 20 20 0 158 0 amappl16 200 1559 0 1545 5 0 5 5 0 8 4 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 97 0 86 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 0 1 1 0 8 1 amappl12 168 990 0 954 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 0 1 1 0 8 1 amappl9 144 254 0 254 1 0 1 1 0 8 1 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 91 0 81 1 0 1 1 0 8 0 amappl6 120 164 0 160 1 0 1 1 0 8 0 amappl5 112 109 0 102 1 0 1 1 0 8 0 amappl4 104 268 0 252 1 0 1 1 0 8 0 amappl3 96 1334 0 1213 3 0 3 3 0 8 0 amappl2 88 587 0 532 2 0 2 2 0 8 0 amappl1 80 7959 0 7378 14 0 14 14 0 8 0 amappl 88 2100 0 1926 4 0 4 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 406 0 367 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 406 0 367 1 0 1 1 0 8 0 vmmpekpl 168 4899 0 4867 2 0 2 2 0 8 0 vmmpepl 168 31866 0 29754 96 0 96 96 0 357 1 vmsppl 480 405 0 367 7 1 6 6 0 8 0 rwobjpl 72 13239 0 10753 48 0 48 48 0 8 0 pdppl 4096 819 0 734 107 10 97 97 0 8 12 pvpl 32 9215 0 0 75 0 75 75 0 265 0 pmappl 256 405 0 367 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 13 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(ffffffff833db35b) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a0ce10) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a0ce10) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087cf868) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087cf868) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b1dd030,0,ffff80003c45b3d8,ffff80003c45b3b4,0,2,7e8a2499d1f01dd5,ffff80003c45b630) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b460,ffff80003c45b468) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45b5f8,ffff80003c45b630,ffff80003c45b570) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806b5fd3f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45b780,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45b780) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ef2752067c0, 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 __mp_lock(ffffffff839127f8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839127f8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c443ec0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c443ec0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d78f673980, count: 9 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 __mp_lock(ffffffff839127f8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839127f8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c443ec0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c443ec0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d78f673980, count: -6