panic: mtx 0xffffffff83876d90: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *455474 42428 32767 0x10 0 0 syz-executor 19593 70631 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83338b4a) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83876d90) at mtx_enter_try+0x1da mtx_enter(ffffffff83876d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800809cfa8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806ba82b40,0,ffff80003c475b78,ffff80003c475b5c,0,2,24b5c064842aa5cd,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475d90,ffff80003c475dc8,ffff80003c475c10,ffff80003c475bf8) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c475d90,ffff80003c475dc8,ffff80003c475d10) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806baccd80,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475f20,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c475f20) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7391ee22e0c0, 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 0xffffffff83876d90: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83338b4a) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83876d90) at mtx_enter_try+0x1da mtx_enter(ffffffff83876d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800809cfa8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806ba82b40,0,ffff80003c475b78,ffff80003c475b5c,0,2,24b5c064842aa5cd,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475d90,ffff80003c475dc8,ffff80003c475c10,ffff80003c475bf8) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c475d90,ffff80003c475dc8,ffff80003c475d10) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806baccd80,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475f20,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c475f20) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7391ee22e0c0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4758b0 rbx 0xffffffff837abddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80002a2e5248 rax 0xffffffff837aaff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfe7f9199a07d973f r11 0x5fd55ab88ac2f2e3 r12 0xffffffff837abbe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff830ae055 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4758a0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=455474 pid=42428 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=0xffff80002a2e4020,0xffff80002a2e4fc0 process=0xffff80002a3730e0 user=0xffff80003c470000, vmspace=0xfffffd806baccd80 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *42428 455474 90467 32767 7 0x10 syz-executor 42428 401146 90467 32767 3 0x4000090 fsleep syz-executor 42428 285396 90467 32767 3 0x4000090 fsleep syz-executor 42428 390031 90467 32767 3 0x4000090 fsleep syz-executor 70631 273241 57987 32767 2 0x10 syz-executor 70631 19593 57987 32767 7 0x4000010 syz-executor 8773 419373 58977 32767 2 0x10 syz-executor 8773 166808 58977 32767 3 0x4000090 piperd syz-executor 5686 381106 98083 32767 2 0x10 syz-executor 97399 342455 60958 32767 2 0x10 syz-executor 97399 323739 60958 32767 3 0x4000090 fsleep syz-executor 97399 189737 60958 32767 3 0x4000090 fsleep syz-executor 648 393603 37233 0 2 0x10000002 syz-executor 98409 150982 70295 0 3 0x82 sbwait sshd-session 49535 490897 0 0 3 0x14200 bored sosplice 33105 506987 81994 32767 3 0x90 piperd syz-executor 98083 10111 84947 32767 3 0x90 nanoslp syz-executor 56818 105787 69834 32767 3 0x90 piperd syz-executor 57987 426091 70745 32767 3 0x90 nanoslp syz-executor 58977 53349 46750 32767 3 0x90 nanoslp syz-executor 90467 107505 41554 32767 3 0x90 nanoslp syz-executor 60958 506487 38765 32767 3 0x90 nanoslp syz-executor 84947 122505 37233 0 3 0x82 wait syz-executor 81994 272905 37233 0 3 0x82 wait syz-executor 69834 497526 37233 0 3 0x82 wait syz-executor 46750 302976 37233 0 3 0x82 wait syz-executor 41554 196761 37233 0 3 0x82 wait syz-executor 70745 111028 37233 0 3 0x82 wait syz-executor 38765 108564 37233 0 3 0x82 wait syz-executor 37233 314317 14322 0 2 0x2 syz-executor 14322 503228 2000 0 3 0x10008a sigsusp ksh 2000 237995 85136 0 3 0x98 kqread sshd-session 85136 451648 70295 0 3 0x92 kqread sshd-session 16083 33573 1 0 3 0x100083 ttyin getty 70295 335580 1 0 3 0x88 kqread sshd 98839 416076 93234 73 3 0x1100090 kqread syslogd 93234 264997 1 0 3 0x100082 sbwait syslogd 18756 436271 1 0 3 0x100080 kqread resolvd 91411 328976 84051 77 3 0x100092 kqread dhcpleased 81810 227572 84051 77 3 0x100092 kqread dhcpleased 84051 306487 1 0 3 0x80 kqread dhcpleased 39217 191904 0 0 3 0x14200 bored smr 43650 282780 0 0 2 0x14200 zerothread 38466 481478 0 0 3 0x14200 aiodoned aiodoned 4356 499380 0 0 3 0x14200 syncer update 6357 331825 0 0 3 0x14200 cleaner cleaner 76470 440396 0 0 3 0x14200 reaper reaper 54337 24925 0 0 3 0x14200 pgdaemon pagedaemon 23309 191119 0 0 3 0x14200 bored viomb 43624 380254 0 0 3 0x40014200 acpi0 acpi0 87877 406227 0 0 3 0x40014200 idle1 61077 234678 0 0 3 0x14200 bored softnet7 19115 494580 0 0 3 0x14200 bored softnet6 85527 125191 0 0 3 0x14200 bored softnet5 31009 182945 0 0 3 0x14200 bored softnet4 22895 460553 0 0 3 0x14200 bored softnet3 99849 137777 0 0 3 0x14200 bored softnet2 54401 18018 0 0 3 0x14200 bored softnet1 35522 286584 0 0 3 0x14200 bored softnet0 62545 239695 0 0 3 0x14200 bored systqmp 72397 478041 0 0 3 0x14200 bored systq 48750 216183 0 0 3 0x14200 tmoslp softclockmp 77003 44464 0 0 3 0x40014200 tmoslp softclock 62433 117112 0 0 3 0x40014200 idle0 1 509371 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 (0xffffffff83876da0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 42428 (syz-executor) thread 0xffff80002a2e5248 (455474) exclusive rwlock uobjlk r = 0 (0xfffffd80739ba288) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1298 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83876da0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 42428 (syz-executor) thread 0xffff80002a2e5778 (285396) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83971eb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:367 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 bwrite+0x2e7 sys/kern/vfs_bio.c:754 #5 ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 #6 ffs_truncate+0x6b3 sys/ufs/ffs/ffs_inode.c:197 #7 ufs_setattr+0x8e9 sys/ufs/ufs/ufs_vnops.c:403 #8 VOP_SETATTR+0x11b sys/kern/vfs_vops.c:210 #9 dotruncate+0x1da sys/kern/vfs_syscalls.c:2865 #10 sys_ftruncate+0x1da sys/kern/vfs_syscalls.c:2916 #11 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80659ea8f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c1 sys/kern/vfs_syscalls.c:2916 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 10954K 10968K 166960K 11274 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 6K 166960K 278 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 43 0 iov 1 0K 16K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1493 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 14 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 81K 125K 166960K 507 0 sigio 0 0K 0K 166960K 46 0 proc 58 99K 147K 166960K 517 0 subproc 72 4K 4K 166960K 189 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 74 0 in_multi 88 6K 7K 166960K 120 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 2 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 396 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 250 185K 195K 166960K 6081 0 UVM aobj 15 3K 4K 166960K 18 0 pinsyscall 45 90K 115K 166960K 1554 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 10 0K 2K 166960K 27 0 temp 55 8643K 8709K 166960K 5882 0 kqueue 13 20K 28K 166960K 95 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 66 0 63 1 0 1 1 0 8 0 rtentry 176 102 0 14 5 0 5 5 0 8 0 unpcb 144 359 0 342 4 1 3 4 0 8 2 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 144 0 136 4 0 4 4 0 8 3 arp 128 11 0 1 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 328 562 0 550 7 0 7 7 0 8 5 nd6 144 22 0 6 1 0 1 1 0 8 0 kcovpl 48 21 0 13 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 467 0 57 29 1 28 29 0 8 0 art_table 40 468 0 57 5 0 5 5 0 8 0 art_node 32 102 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2014 0 495 95 0 95 95 0 8 0 ffsino 296 2014 0 495 117 0 117 117 0 8 0 nchpl 144 2653 0 964 63 0 63 63 0 8 0 uvmvnodes 80 2212 0 0 46 0 46 46 0 8 0 vnodes 216 2212 0 0 123 0 123 123 0 8 0 namei 1024 8432 0 8432 2 1 1 2 0 8 1 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 9269 0 9269 4 3 1 3 1 8 1 plimitpl 152 125 0 101 2 0 2 2 0 8 0 sigapl 424 770 0 711 8 1 7 8 0 8 0 knotepl 120 541 0 0 17 0 17 17 0 8 0 kqueuepl 224 191 0 181 5 0 5 5 0 8 4 pipepl 344 174 0 145 4 0 4 4 0 8 0 fdescpl 528 747 0 712 4 1 3 4 0 8 0 filepl 160 3774 0 3561 13 1 12 13 0 8 3 lockfpl 104 110 0 107 1 0 1 1 0 8 0 lockfspl 48 39 0 36 1 0 1 1 0 8 0 sessionpl 144 39 0 22 1 0 1 1 0 8 0 pgrppl 48 61 0 36 1 0 1 1 0 8 0 ucredpl 104 544 0 526 1 0 1 1 0 8 0 zombiepl 144 712 0 711 1 0 1 1 0 8 0 processpl 1248 770 0 711 7 2 5 6 0 8 0 procpl 664 1321 0 1255 7 0 7 7 0 8 1 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 992 0 960 11 0 11 11 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 41 0 0 6 0 6 6 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 330 0 0 21 0 21 21 0 8 0 bufpl 280 3568 0 123 247 0 247 247 0 8 0 anonpl 32 7407 0 0 60 0 60 60 0 246 0 amapchunkpl 152 19509 0 18999 47 5 42 43 0 158 21 amappl16 200 2635 0 2610 17 7 10 14 0 8 8 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 114 0 103 1 0 1 1 0 8 0 amappl13 176 10 0 10 2 2 0 1 0 8 0 amappl12 168 1365 0 1330 2 0 2 2 0 8 0 amappl11 160 57 0 47 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 100 0 88 1 0 1 1 0 8 0 amappl6 120 178 0 174 1 0 1 1 0 8 0 amappl5 112 134 0 127 1 0 1 1 0 8 0 amappl4 104 286 0 271 1 0 1 1 0 8 0 amappl3 96 3428 0 3311 4 0 4 4 0 8 0 amappl2 88 646 0 585 2 0 2 2 0 8 0 amappl1 80 10505 0 9860 15 1 14 15 0 8 0 amappl 88 5343 0 5167 6 1 5 6 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 17 0 3 1 0 1 1 0 8 0 uaddrrnd 24 747 0 712 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 747 0 712 1 0 1 1 0 8 0 vmmpekpl 168 7965 0 7920 3 0 3 3 0 8 0 vmmpepl 168 54363 0 52268 100 2 98 100 0 357 5 vmsppl 488 746 0 712 7 2 5 6 0 8 0 rwobjpl 80 19468 0 16315 66 0 66 66 0 8 1 pdppl 4096 1502 0 1424 118 38 80 98 0 8 2 pvpl 32 15990 0 0 129 0 129 129 0 265 0 pmappl 256 746 0 712 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 305 0 43 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(ffffffff83338b4a) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83876d90) at mtx_enter_try+0x1da mtx_enter(ffffffff83876d90) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800809cfa8) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800809cfa8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806ba82b40,0,ffff80003c475b78,ffff80003c475b5c,0,2,24b5c064842aa5cd,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475d90,ffff80003c475dc8,ffff80003c475c10,ffff80003c475bf8) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c475d90,ffff80003c475dc8,ffff80003c475d10) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806baccd80,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475f20,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c475f20) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7391ee22e0c0, 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 copy_fault() at copy_fault syscall(ffff80003c481650) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481650) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd699d1b2b10, 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 copy_fault() at copy_fault syscall(ffff80003c481650) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481650) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd699d1b2b10, count: -6