panic: mtx 0xffffffff839b7190: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *296589 98414 0 0 0 0 syz-executor 420531 71697 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dde30) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b7190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839b7190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800801e6b0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc60a8,0,ffff80003c43ae68,ffff80003c43ae4c,0,2,3e4f5204b1627e65,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43af00,ffff80003c43aee8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43b000) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bbfb5c0,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43b210,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c43b210) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71f99b105510, 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 0xffffffff839b7190: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dde30) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b7190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839b7190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800801e6b0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc60a8,0,ffff80003c43ae68,ffff80003c43ae4c,0,2,3e4f5204b1627e65,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43af00,ffff80003c43aee8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43b000) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bbfb5c0,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43b210,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c43b210) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71f99b105510, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c43abb0 rbx 0xffffffff83826dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003a022028 rax 0xffffffff83825ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x35cdece0a0266523 r11 0xf4f41123d102c249 r12 0xffffffff83826bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81420405 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c43aba0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=296589 pid=98414 tcnt=4 stat=onproc flags process=0 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff0540,0xffff80003a023748 process=0xffff80003a024020 user=0xffff80003c436000, vmspace=0xfffffd806bbfb5c0 estcpu=16, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *98414 296589 10979 0 7 0 syz-executor 98414 266289 10979 0 3 0x4000080 fsleep syz-executor 98414 414567 10979 0 3 0x4000080 fsleep syz-executor 98414 499931 10979 0 3 0x4000080 fsleep syz-executor 42315 404596 59642 0 2 0 syz-executor 42315 427228 59642 0 3 0x4000080 piperd syz-executor 78821 14029 23231 0 2 0 syz-executor 78821 364455 23231 0 3 0x4000080 fsleep syz-executor 35110 466045 91912 0 2 0 syz-executor 35110 326148 91912 0 3 0x4000080 fsleep syz-executor 71697 420531 39721 0 7 0 syz-executor 71697 129295 39721 0 2 0x4000000 syz-executor 71697 284658 39721 0 3 0x4000080 fsleep syz-executor 63269 86616 0 0 3 0x14200 bored sosplice 61075 293878 16156 0 3 0x82 nanoslp syz-executor 59642 180841 16156 0 3 0x82 nanoslp syz-executor 39721 216167 16156 0 3 0x82 nanoslp syz-executor 23231 434179 16156 0 3 0x82 nanoslp syz-executor 91912 141887 16156 0 3 0x82 nanoslp syz-executor 10979 21081 16156 0 3 0x82 nanoslp syz-executor 23710 362600 16156 0 3 0x82 wait syz-executor 82662 192902 16156 0 3 0x82 nanoslp syz-executor 16156 220063 45251 0 3 0x82 kqread syz-executor 45251 166285 2902 0 3 0x10008a sigsusp ksh 2902 471134 91619 0 3 0x98 kqread sshd-session 91619 453007 37533 0 3 0x92 kqread sshd-session 66601 79760 1 0 3 0x100083 ttyin getty 37533 497605 1 0 3 0x88 kqread sshd 62421 350446 51807 74 3 0x1100092 bpf pflogd 51807 423291 1 0 3 0x80 sbwait pflogd 80793 253210 25312 73 3 0x1100090 kqread syslogd 25312 16864 1 0 3 0x100082 sbwait syslogd 56311 183210 1 0 3 0x100080 kqread resolvd 25793 55668 90585 77 3 0x100092 kqread dhcpleased 23897 187312 90585 77 3 0x100092 kqread dhcpleased 90585 146783 1 0 3 0x80 kqread dhcpleased 94876 185257 0 0 3 0x14200 pause smr 95302 13340 0 0 2 0x14200 zerothread 60939 181453 0 0 3 0x14200 aiodoned aiodoned 79755 460216 0 0 3 0x14200 syncer update 31169 65180 0 0 3 0x14200 cleaner cleaner 12974 482366 0 0 3 0x14200 reaper reaper 43743 302652 0 0 3 0x14200 pgdaemon pagedaemon 50601 251040 0 0 3 0x14200 bored viomb 11787 241912 0 0 3 0x40014200 acpi0 acpi0 41804 282772 0 0 3 0x40014200 idle1 47798 16283 0 0 3 0x14200 bored softnet3 91167 233456 0 0 3 0x14200 bored softnet2 71168 219487 0 0 3 0x14200 bored softnet1 2494 28001 0 0 3 0x14200 bored softnet0 26168 211442 0 0 3 0x14200 bored systqmp 41087 206700 0 0 3 0x14200 bored systq 61755 504751 0 0 3 0x14200 tmoslp softclockmp 11259 406617 0 0 3 0x40014200 tmoslp softclock 68752 121220 0 0 3 0x40014200 idle0 1 97288 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 (0xffffffff839b71a0) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 98414 (syz-executor) thread 0xffff80003a022028 (296589) exclusive rwlock uobjlk r = 0 (0xfffffd80654af380) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 (0xffffffff839b71a0) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 98414 (syz-executor) thread 0xffff80003a023738 (266289) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838e80c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:412 #4 biowait+0xc1 sys/kern/vfs_bio.c:1246 #5 bwrite+0x2e5 sys/kern/vfs_bio.c:758 #6 ffs_update+0x34f sys/ufs/ffs/ffs_inode.c:111 #7 ffs_truncate+0x6c8 sys/ufs/ffs/ffs_inode.c:197 #8 ufs_setattr+0x912 sys/ufs/ufs/ufs_vnops.c:403 #9 VOP_SETATTR+0x11c sys/kern/vfs_vops.c:210 #10 dotruncate+0x1d6 sys/kern/vfs_syscalls.c:2860 #11 sys_ftruncate+0x1dd sys/kern/vfs_syscalls.c:2912 #12 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069a17640) #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:2912 #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 10195 11039K 11460K 166960K 11425 0 pcb 17 12K 12K 166960K 25 0 rtable 212 6K 6K 166960K 350 0 pf 35 17K 18K 166960K 50 0 ifaddr 40 6K 7K 166960K 47 0 ifgroup 56 2K 2K 166960K 62 0 sysctl 2 1K 1K 166960K 2 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1493 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1346 85K 85K 166960K 1428 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 7 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 218 0 proc 71 91K 140K 166960K 545 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 18 0 in_multi 88 6K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 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 364 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 254 176K 184K 166960K 3626 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 105K 166960K 1289 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 12 0K 2K 166960K 30 0 temp 38 8678K 8806K 166960K 5168 0 kqueue 13 20K 28K 166960K 40 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 37 0 34 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 133 0 112 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 27 0 20 1 0 1 1 0 8 0 arp 128 18 0 2 1 0 1 1 0 8 0 inpcb 384 112 0 101 2 0 2 2 0 8 0 nd6 144 24 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 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 19 0 0 1 0 1 1 0 8 0 pfstkey 128 19 0 0 1 0 1 1 0 8 0 pfstate 384 19 0 0 2 0 2 2 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 44 29 0 29 29 0 8 1 art_table 32 453 0 44 4 0 4 4 0 8 0 art_node 16 110 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 10 0 5 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1708 0 197 96 0 96 96 0 8 0 ffsino 288 1708 0 197 109 0 109 109 0 8 0 nchpl 144 1999 0 305 63 0 63 63 0 8 0 uvmvnodes 80 1834 0 0 38 0 38 38 0 8 0 vnodes 216 1834 0 0 102 0 102 102 0 8 0 namei 1024 6192 0 6192 2 0 2 2 0 8 2 percpumem 16 49 0 2 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6787 0 6787 9 1 8 8 1 8 8 plimitpl 152 40 0 22 1 0 1 1 0 8 0 sigapl 424 510 0 459 7 0 7 7 0 8 1 futexpl 64 1284 0 1278 1 0 1 1 0 8 0 knotepl 120 462 0 0 14 0 14 14 0 8 0 kqueuepl 224 45 0 36 1 0 1 1 0 8 0 pipepl 336 113 0 83 3 0 3 3 0 8 0 fdescpl 520 491 0 459 3 0 3 3 0 8 0 filepl 160 1904 0 1667 13 0 13 13 0 8 2 lockfpl 104 28 0 25 1 0 1 1 0 8 0 lockfspl 48 15 0 12 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 152 0 139 1 0 1 1 0 8 0 zombiepl 144 462 0 459 1 0 1 1 0 8 0 processpl 1192 510 0 459 5 0 5 5 0 8 0 procpl 656 641 0 582 6 0 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 728 283 0 248 9 0 9 9 0 8 5 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 116 0 0 8 0 8 8 0 8 0 bufpl 280 2439 0 123 166 0 166 166 0 8 0 anonpl 32 3997 0 0 33 0 33 33 0 246 0 amapchunkpl 152 10446 0 9904 23 0 23 23 0 158 2 amappl16 200 2100 0 2073 5 2 3 5 0 8 1 amappl15 192 38 0 38 1 1 0 1 0 8 0 amappl14 184 110 0 98 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 1130 0 1098 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 325 0 324 1 0 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 177 0 174 1 0 1 1 0 8 0 amappl5 112 122 0 113 1 0 1 1 0 8 0 amappl4 104 314 0 295 1 0 1 1 0 8 0 amappl3 96 1734 0 1608 5 1 4 4 0 8 0 amappl2 88 624 0 563 2 0 2 2 0 8 0 amappl1 80 8329 0 7710 15 0 15 15 0 8 1 amappl 88 2944 0 2765 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 128 254 0 254 2 1 1 1 0 8 1 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 24 491 0 459 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 491 0 459 1 0 1 1 0 8 0 vmmpekpl 168 5678 0 5636 2 0 2 2 0 8 0 vmmpepl 168 37719 0 35675 91 0 91 91 0 357 2 vmsppl 480 490 0 459 5 0 5 5 0 8 1 rwobjpl 72 15012 0 12218 51 0 51 51 0 8 0 pdppl 4096 990 0 918 98 22 76 86 0 8 4 pvpl 32 10833 0 0 88 0 88 88 0 265 0 pmappl 256 490 0 459 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 376 0 24 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(ffffffff833dde30) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b7190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839b7190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800801e6b0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800801e6b0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc60a8,0,ffff80003c43ae68,ffff80003c43ae4c,0,2,3e4f5204b1627e65,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43af00,ffff80003c43aee8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c43b080,ffff80003c43b0b8,ffff80003c43b000) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bbfb5c0,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c43b210,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c43b210) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x71f99b105510, 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 end of kernel end trace frame: 0x719f183ebdf0, count: 12 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 end of kernel end trace frame: 0x719f183ebdf0, count: -3