panic: mtx 0xffffffff83942b58: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 95178 52743 32767 0x10 0 0 syz-executor 79618 47664 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d5fb5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83942b58) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83942b58) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008536b80) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806bee7d00,0,ffff80003c4ebcc8,ffff80003c4ebca4,0,2,f7660b73f0e70972,ffff80003c4ebf20) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebd50,ffff80003c4ebd58) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebe60) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c1b93b8,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4ec070,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4ec070) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79d6e9859e20, 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 0xffffffff83942b58: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d5fb5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83942b58) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83942b58) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008536b80) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806bee7d00,0,ffff80003c4ebcc8,ffff80003c4ebca4,0,2,f7660b73f0e70972,ffff80003c4ebf20) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebd50,ffff80003c4ebd58) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebe60) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c1b93b8,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4ec070,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4ec070) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79d6e9859e20, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4eba10 rbx 0xffffffff83891dc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff80002a34ea58 rax 0xffffffff83890ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf9e54f30fdda456f r11 0xcedd0f4109f675bd r12 0xffffffff83891bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff810b2375 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4eba00 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=95178 pid=52743 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=0xffff80003c51e2c0,0xffff80002a34ecf8 process=0xffff8000ffff04b8 user=0xffff80003c4e7000, vmspace=0xfffffd806c1b93b8 estcpu=28, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *52743 95178 64777 32767 7 0x10 syz-executor 52743 289477 64777 32767 3 0x4000090 fsleep syz-executor 52743 40916 64777 32767 3 0x4000010 biowait syz-executor 52743 329734 64777 32767 3 0x4000090 fsleep syz-executor 14420 85687 23990 32767 2 0x10 syz-executor 14420 393564 23990 32767 3 0x4000090 fsleep syz-executor 14420 218022 23990 32767 2 0x4000010 syz-executor 22256 487976 43872 32767 2 0x10 syz-executor 22256 272721 43872 32767 2 0x4000010 syz-executor 22256 288647 43872 32767 3 0x4000090 fsleep syz-executor 47664 78547 75494 32767 2 0x10 syz-executor 47664 79618 75494 32767 7 0x4000010 syz-executor 36310 83882 11080 32767 2 0x10 syz-executor 36310 431684 11080 32767 3 0x4000090 fsleep syz-executor 69320 210498 75255 32767 2 0x10 syz-executor 69320 376952 75255 32767 3 0x4000090 fsleep syz-executor 75309 125021 97037 32767 2 0x10 syz-executor 75309 39638 97037 32767 3 0x4000090 fsleep syz-executor 85394 253266 0 0 3 0x14200 bored sosplice 42708 366832 37761 32767 2 0x10 syz-executor 42708 248886 37761 32767 3 0x4000090 fsleep syz-executor 42708 464602 37761 32767 3 0x4000090 fsleep syz-executor 42708 288585 37761 32767 3 0x4000090 fsleep syz-executor 43872 264171 84725 32767 3 0x90 nanoslp syz-executor 23990 49102 91139 32767 3 0x90 nanoslp syz-executor 75255 232400 32308 32767 3 0x90 nanoslp syz-executor 75494 509845 14112 32767 3 0x90 nanoslp syz-executor 64777 372134 31237 32767 3 0x90 nanoslp syz-executor 97037 418654 52976 32767 3 0x90 nanoslp syz-executor 11080 103020 81920 32767 3 0x90 nanoslp syz-executor 37761 290750 67136 32767 3 0x90 nanoslp syz-executor 84725 86502 4384 0 3 0x82 wait syz-executor 91139 231012 4384 0 3 0x82 wait syz-executor 52976 277046 4384 0 3 0x82 wait syz-executor 32308 232564 4384 0 3 0x82 wait syz-executor 31237 458691 4384 0 3 0x82 wait syz-executor 14112 479321 4384 0 3 0x82 wait syz-executor 81920 373558 4384 0 3 0x82 wait syz-executor 67136 123249 4384 0 3 0x82 wait syz-executor 4384 196763 17336 0 3 0x82 kqread syz-executor 17336 423908 15578 0 3 0x10008a sigsusp ksh 15578 20290 40427 0 3 0x98 kqread sshd-session 40427 184876 92510 0 3 0x92 kqread sshd-session 51120 129044 1 0 3 0x100083 ttyin getty 92510 505903 1 0 3 0x88 kqread sshd 98550 322166 92744 73 3 0x1100090 kqread syslogd 92744 484843 1 0 3 0x100082 sbwait syslogd 88770 208887 1 0 3 0x100080 kqread resolvd 18803 518887 44217 77 3 0x100092 kqread dhcpleased 98029 121225 44217 77 3 0x100092 kqread dhcpleased 44217 78927 1 0 3 0x80 kqread dhcpleased 33894 317116 0 0 3 0x14200 bored smr 57413 384127 0 0 2 0x14200 zerothread 42416 393963 0 0 3 0x14200 aiodoned aiodoned 8643 316833 0 0 3 0x14200 syncer update 94459 430209 0 0 3 0x14200 cleaner cleaner 88481 65249 0 0 3 0x14200 reaper reaper 6846 52715 0 0 3 0x14200 pgdaemon pagedaemon 24150 451147 0 0 3 0x14200 bored viomb 72320 16750 0 0 3 0x40014200 acpi0 acpi0 17056 221985 0 0 3 0x40014200 idle1 10401 10705 0 0 3 0x14200 bored softnet3 7794 123960 0 0 3 0x14200 bored softnet2 41421 389629 0 0 3 0x14200 bored softnet1 38757 1029 0 0 3 0x14200 bored softnet0 20953 427807 0 0 3 0x14200 bored systqmp 80769 178115 0 0 3 0x14200 bored systq 15756 278104 0 0 3 0x14200 tmoslp softclockmp 78775 429116 0 0 3 0x40014200 tmoslp softclock 56128 191482 0 0 3 0x40014200 idle0 1 156344 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 (0xffffffff83942b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 52743 (syz-executor) thread 0xffff80002a34ea58 (95178) exclusive rwlock uobjlk r = 0 (0xfffffd806bd98aa0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 (0xffffffff83942b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 52743 (syz-executor) thread 0xffff80003c51f4b0 (289477) exclusive rwlock futex r = 0 (0xffffffff8386d768) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 52743 (syz-executor) thread 0xffff80003c51fc60 (40916) exclusive rrwlock inode r = 0 (0xfffffd806bfc8ab8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 10182 10953K 10965K 166960K 11259 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 353 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 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 29 0 iov 0 0K 2K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1351 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 174 0 sigio 0 0K 0K 166960K 1 0 proc 58 79K 115K 166960K 473 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 3 0 in_multi 99 7K 7K 166960K 99 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 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 348 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 271 189K 196K 166960K 3080 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 47 94K 113K 166960K 1209 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 27 2K 2K 166960K 27 0 temp 37 8678K 8742K 166960K 3875 0 kqueue 14 22K 24K 166960K 28 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 168 111 0 1 5 0 5 5 0 8 0 unpcb 144 50 0 30 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 15 0 10 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 376 83 0 74 2 0 2 2 0 8 1 nd6 136 24 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 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 4 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1582 0 76 95 0 95 95 0 8 0 ffsino 280 1582 0 76 108 0 108 108 0 8 0 nchpl 144 1810 0 130 63 0 63 63 0 8 0 uvmvnodes 80 1663 0 0 34 0 34 34 0 8 0 vnodes 216 1663 0 0 93 0 93 93 0 8 0 namei 1024 5341 0 5341 1 0 1 1 0 8 1 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 5948 0 5946 3 1 2 2 1 8 1 plimitpl 152 40 0 13 2 0 2 2 0 8 0 sigapl 424 458 0 401 7 0 7 7 0 8 0 futexpl 64 480 0 470 1 0 1 1 0 8 0 knotepl 120 272 0 0 9 0 9 9 0 8 0 kqueuepl 216 28 0 17 1 0 1 1 0 8 0 pipepl 328 103 0 76 3 0 3 3 0 8 0 fdescpl 504 439 0 401 7 1 6 6 0 8 0 filepl 152 1525 0 1302 9 0 9 9 0 8 0 lockfpl 104 20 0 17 1 0 1 1 0 8 0 lockfspl 48 8 0 5 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 129 0 110 1 0 1 1 0 8 0 zombiepl 144 401 0 401 1 0 1 1 0 8 1 processpl 1176 458 0 401 5 0 5 5 0 8 0 procpl 656 523 0 452 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 688 172 0 140 4 0 4 4 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 187 0 0 12 0 12 12 0 8 0 bufpl 280 2336 0 117 159 0 159 159 0 8 0 anonpl 24 103960 0 100398 23 0 23 23 0 184 1 amapchunkpl 152 8765 0 8175 23 0 23 23 0 158 0 amappl16 200 2178 0 2142 5 0 5 5 0 8 3 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 111 0 101 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 0 1 1 0 8 1 amappl12 168 1060 0 1020 3 1 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 0 1 1 0 8 1 amappl9 144 243 0 243 1 0 1 1 0 8 1 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 96 0 86 1 0 1 1 0 8 0 amappl6 120 174 0 171 1 0 1 1 0 8 0 amappl5 112 121 0 115 1 0 1 1 0 8 0 amappl4 104 285 0 270 1 0 1 1 0 8 0 amappl3 96 1387 0 1250 4 0 4 4 0 8 0 amappl2 88 608 0 554 2 0 2 2 0 8 0 amappl1 80 7978 0 7401 14 0 14 14 0 8 1 amappl 88 2437 0 2236 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 439 0 401 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 439 0 401 1 0 1 1 0 8 0 vmmpekpl 168 5098 0 5066 2 0 2 2 0 8 0 vmmpepl 168 34327 0 32148 97 1 96 96 0 357 1 vmsppl 456 438 0 401 7 1 6 6 0 8 1 rwobjpl 64 14178 0 11645 42 0 42 42 0 8 0 pdppl 4096 885 0 802 113 18 95 95 0 8 12 pvpl 32 9668 0 0 78 0 78 78 0 265 0 pmappl 248 438 0 401 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 286 0 21 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(ffffffff833d5fb5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83942b58) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83942b58) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008536b80) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008536b80) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806bee7d00,0,ffff80003c4ebcc8,ffff80003c4ebca4,0,2,f7660b73f0e70972,ffff80003c4ebf20) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebd50,ffff80003c4ebd58) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4ebee8,ffff80003c4ebf20,ffff80003c4ebe60) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c1b93b8,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4ec070,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4ec070) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79d6e9859e20, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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(ffffffff8393ad50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8393ad50) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c4f26a0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f26a0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71822371d80, count: 9 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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(ffffffff8393ad50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8393ad50) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c4f26a0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f26a0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71822371d80, count: -6