panic: mtx 0xffffffff8395be88: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *472933 34473 0 0 0 0 syz-executor 505642 34473 0 0 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f38cc) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8395be88) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff8395be88) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800814f668) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805b3f5d20,1000,ffff80003c43f1d8,ffff80003c43f1bc,0,2,84c7706093b0b4a6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f270,ffff80003c43f258) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f370) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd80603adb68,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43f580,200000001c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c43f580) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ccce8a31780, 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 0xffffffff8395be88: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f38cc) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8395be88) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff8395be88) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800814f668) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805b3f5d20,1000,ffff80003c43f1d8,ffff80003c43f1bc,0,2,84c7706093b0b4a6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f270,ffff80003c43f258) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f370) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd80603adb68,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43f580,200000001c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c43f580) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ccce8a31780, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c43ef10 rbx 0xffffffff837efdd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c4167e0 rax 0xffffffff837eeff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6f99004a104f7207 r11 0xb5e36b397854638f r12 0xffffffff837efbd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff82ca5fd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c43ef00 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=472933 pid=34473 tcnt=4 stat=onproc flags process=0 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c416a70,0xffff80003c416040 process=0xffff8000fffe8eb0 user=0xffff80003c43a000, vmspace=0xfffffd80603adb68 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *34473 472933 91279 0 7 0 syz-executor 34473 494137 91279 0 3 0x4000080 fsleep syz-executor 34473 194445 91279 0 3 0x4000000 biowait syz-executor 34473 505642 91279 0 7 0x4000000 syz-executor 90097 511884 79677 0 2 0 syz-executor 72419 292246 51791 0 2 0 syz-executor 72419 379657 51791 0 2 0x4000000 syz-executor 72419 144496 51791 0 2 0x4000000 syz-executor 29880 429169 11454 0 2 0 syz-executor 29880 309600 11454 0 3 0x4000080 fsleep syz-executor 87079 143082 8994 0 2 0 syz-executor 87079 386 8994 0 3 0x4000080 sbwait syz-executor 33098 127510 72660 0 2 0 syz-executor 33098 147838 72660 0 3 0x4000080 fsleep syz-executor 33098 119635 72660 0 2 0x4000000 syz-executor 67642 251997 36789 0 3 0x80 nanoslp syz-executor 67642 66571 36789 0 3 0x4000080 bell syz-executor 67642 378718 36789 0 3 0x4000080 fsleep syz-executor 39214 270670 1 0 3 0x100083 ttyopn getty 59405 278039 0 0 3 0x14200 bored sosplice 8994 68938 85904 0 3 0x82 nanoslp syz-executor 51791 461110 85904 0 3 0x82 nanoslp syz-executor 72660 86291 85904 0 3 0x82 nanoslp syz-executor 24896 429952 85904 0 3 0x82 wait syz-executor 11454 443679 85904 0 3 0x82 nanoslp syz-executor 36789 502892 85904 0 3 0x82 nanoslp syz-executor 91279 194044 85904 0 3 0x82 nanoslp syz-executor 79677 397495 85904 0 3 0x82 nanoslp syz-executor 85904 447388 88417 0 3 0x82 kqread syz-executor 88417 206938 55294 0 3 0x10008a sigsusp ksh 55294 269534 10244 0 3 0x98 kqread sshd-session 10244 328643 80710 0 3 0x92 kqread sshd-session 80710 321320 1 0 3 0x88 kqread sshd 87212 411097 35428 74 3 0x1100092 bpf pflogd 35428 92391 1 0 3 0x80 sbwait pflogd 98133 248889 38677 73 3 0x1100090 kqread syslogd 38677 112219 1 0 3 0x100082 sbwait syslogd 55499 304023 1 0 3 0x100080 kqread resolvd 84606 496220 3691 77 3 0x100092 kqread dhcpleased 49864 335766 3691 77 3 0x100092 kqread dhcpleased 3691 461849 1 0 3 0x80 kqread dhcpleased 19605 130067 0 0 3 0x14200 bored smr 61416 517700 0 0 3 0x14200 pgzero zerothread 8121 133329 0 0 3 0x14200 aiodoned aiodoned 29092 286557 0 0 3 0x14200 syncer update 78681 148067 0 0 3 0x14200 cleaner cleaner 32626 401494 0 0 3 0x14200 reaper reaper 36577 487805 0 0 3 0x14200 pgdaemon pagedaemon 87753 61030 0 0 3 0x14200 bored viomb 15516 343655 0 0 3 0x40014200 acpi0 acpi0 26159 184701 0 0 3 0x40014200 idle1 63789 449144 0 0 3 0x14200 bored softnet3 29157 359433 0 0 3 0x14200 bored softnet2 40048 277427 0 0 3 0x14200 bored softnet1 13830 250100 0 0 3 0x14200 bored softnet0 85816 264686 0 0 3 0x14200 bored systqmp 63900 230447 0 0 3 0x14200 bored systq 37342 473066 0 0 3 0x14200 tmoslp softclockmp 90335 411326 0 0 3 0x40014200 tmoslp softclock 39475 294218 0 0 3 0x40014200 idle0 1 132654 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 (0xffffffff8395be98) #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 34473 (syz-executor) thread 0xffff80003c4167e0 (472933) exclusive rwlock uobjlk r = 0 (0xfffffd805b768840) #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 (0xffffffff8395be98) #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 34473 (syz-executor) thread 0xffff8000303da7d8 (194445) exclusive rrwlock inode r = 0 (0xfffffd806bf527a0) #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 87079 (syz-executor) thread 0xffff80003c4174b0 (386) exclusive rwlock sbufrcv r = 0 (0xffff8000014606a8) #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 sblock+0xb7 sys/kern/uipc_socket2.c:536 #3 soreceive+0x28e sys/kern/uipc_socket.c:866 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11035K 15131K 166960K 12148 0 pcb 18 14K 16K 166960K 191 0 rtable 168 14K 15K 166960K 337 0 pf 34 17K 21K 166960K 70 0 ifaddr 37 6K 7K 166960K 61 0 ifgroup 55 2K 2K 166960K 81 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1526 0 iov 1 4K 16K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 1780 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 20 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 502 0 sigio 0 0K 0K 166960K 4 0 proc 72 91K 127K 166960K 604 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 56 0 in_multi 79 5K 7K 166960K 123 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 447 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 237 151K 165K 166960K 6508 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 43 86K 104K 166960K 1639 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 12 0K 2K 166960K 39 0 temp 48 8673K 8799K 166960K 21559 0 kqueue 13 20K 28K 166960K 88 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 76 0 73 1 0 1 1 0 8 0 rtentry 176 104 0 39 5 0 5 5 0 8 1 unpcb 144 438 0 419 4 0 4 4 0 8 3 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpcb 736 236 0 231 7 0 7 7 0 8 6 arp 128 11 0 3 1 0 1 1 0 8 0 inpcb 328 835 0 822 7 0 7 7 0 8 5 nd6 144 16 0 4 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 13 0 13 1 0 1 1 0 8 1 pffrag 232 8 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 6 1 0 1 1 0 8 0 pffrent 40 15 0 13 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 45 0 1 1 0 1 1 0 8 0 pfstkey 128 45 0 1 2 0 2 2 0 8 0 pfstate 384 45 0 1 5 0 5 5 0 8 0 pfrule 1344 23 0 17 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 492 0 152 28 0 28 28 0 8 5 art_table 40 494 0 152 5 0 5 5 0 8 0 art_node 32 102 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2349 0 836 95 0 95 95 0 8 0 ffsino 288 2349 0 836 109 0 109 109 0 8 0 nchpl 144 3066 0 1369 64 0 64 64 0 8 0 uvmvnodes 80 2650 0 0 55 0 55 55 0 8 0 vnodes 216 2650 0 0 148 0 148 148 0 8 0 namei 1024 10757 0 10757 2 1 1 2 0 8 1 percpumem 16 64 0 15 1 0 1 1 0 8 0 kstatmem 264 50 0 22 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10092 0 10090 3 2 1 2 1 8 0 plimitpl 152 157 0 140 1 0 1 1 0 8 0 sigapl 424 817 0 766 8 2 6 7 0 8 0 knotepl 120 315 0 0 10 0 10 10 0 8 0 kqueuepl 224 263 0 254 9 0 9 9 0 8 8 pipepl 336 150 0 123 3 0 3 3 0 8 0 fdescpl 520 798 0 766 3 0 3 3 0 8 0 filepl 160 5415 0 5189 19 1 18 19 0 8 8 lockfpl 104 205 0 202 1 0 1 1 0 8 0 lockfspl 48 93 0 90 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 104 0 87 1 0 1 1 0 8 0 ucredpl 104 547 0 534 1 0 1 1 0 8 0 zombiepl 144 767 0 766 1 0 1 1 0 8 0 processpl 1240 817 0 766 6 1 5 5 0 8 0 procpl 656 1483 0 1421 7 1 6 6 0 8 0 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 728 1358 0 1323 10 0 10 10 0 8 6 mcl64k 65536 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 136 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 169 0 0 11 0 11 11 0 8 0 bufpl 280 3684 0 127 255 0 255 255 0 8 0 anonpl 32 5536 0 0 46 1 45 45 0 246 0 amapchunkpl 152 20341 0 19847 31 3 28 28 0 158 7 amappl16 200 1500 0 1387 8 2 6 6 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 121 0 109 1 0 1 1 0 8 0 amappl12 168 1478 0 1446 2 0 2 2 0 8 0 amappl11 160 132 0 118 1 0 1 1 0 8 0 amappl10 152 3 0 3 2 2 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 45 0 42 1 0 1 1 0 8 0 amappl7 128 138 0 125 1 0 1 1 0 8 0 amappl6 120 176 0 173 1 0 1 1 0 8 0 amappl5 112 120 0 110 1 0 1 1 0 8 0 amappl4 104 317 0 296 1 0 1 1 0 8 0 amappl3 96 3831 0 3715 4 0 4 4 0 8 0 amappl2 88 682 0 616 2 0 2 2 0 8 0 amappl1 80 10596 0 10001 15 0 15 15 0 8 1 amappl 88 5714 0 5548 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 dma64 64 8 0 8 2 1 1 1 0 8 1 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 1 1 0 1 1 0 8 0 uaddrrnd 24 798 0 766 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 798 0 766 1 0 1 1 0 8 0 vmmpekpl 168 8089 0 8048 3 0 3 3 0 8 0 vmmpepl 168 56572 0 54464 95 0 95 95 0 357 2 vmsppl 480 797 0 766 6 1 5 5 0 8 0 rwobjpl 72 19334 0 15669 67 0 67 67 0 8 0 pdppl 4096 1604 0 1532 100 28 72 86 0 8 0 pvpl 32 12834 0 0 104 0 104 104 0 265 0 pmappl 256 797 0 766 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 391 0 33 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(ffffffff833f38cc) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8395be88) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff8395be88) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800814f668) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800814f668) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805b3f5d20,1000,ffff80003c43f1d8,ffff80003c43f1bc,0,2,84c7706093b0b4a6,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f270,ffff80003c43f258) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c43f3f0,ffff80003c43f428,ffff80003c43f370) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd80603adb68,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43f580,200000001c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c43f580) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ccce8a31780, 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(ffffffff8395a9c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395a9c0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 end trace frame: 0x0, count: 11 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(ffffffff8395a9c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395a9c0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 end trace frame: 0x0, count: -4