panic: mtx 0xffffffff838f1898: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 37563 22212 0 0 0 0 syz-executor 99557 70052 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339e7c) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838f1898) at mtx_enter_try+0x1da mtx_enter(ffffffff838f1898) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fc5d60) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80600eb490,0,ffff80003bc213a8,ffff80003bc2138c,0,2,159bbb34b330c171,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21440,ffff80003bc21428) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21540) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b8287c0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003bc21750,200000000280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003bc21750) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x717a8fc019a0, 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 0xffffffff838f1898: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339e7c) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838f1898) at mtx_enter_try+0x1da mtx_enter(ffffffff838f1898) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fc5d60) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80600eb490,0,ffff80003bc213a8,ffff80003bc2138c,0,2,159bbb34b330c171,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21440,ffff80003bc21428) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21540) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b8287c0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003bc21750,200000000280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003bc21750) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x717a8fc019a0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bc210e0 rbx 0xffffffff837c5ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff800037c09778 rax 0xffffffff837c4ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x944f973d9e8c2074 r11 0x416378e4cc5e203c r12 0xffffffff837c5be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff82c282e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003bc210d0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=37563 pid=22212 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=0xffff800037c08a80,0xffff800037c087f8 process=0xffff80003bc270e0 user=0xffff80003bc1c000, vmspace=0xfffffd806b8287c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79876 301753 38713 0 2 0 syz-executor *22212 37563 89465 0 7 0 syz-executor 22212 22565 89465 0 3 0x4000080 fsleep syz-executor 22212 79047 89465 0 3 0x4000080 fsleep syz-executor 22212 11520 89465 0 3 0x4000080 fsleep syz-executor 29488 421472 26712 0 2 0 syz-executor 70052 99557 40901 0 7 0 syz-executor 70052 328439 40901 0 3 0x4000080 fsleep syz-executor 66540 474227 66093 0 3 0x80 nanoslp syz-executor 66540 250863 66093 0 3 0x4000080 sbwait syz-executor 66540 143005 66093 0 3 0x4000080 fsleep syz-executor 21070 384451 0 0 3 0x14200 bored sosplice 40452 329114 58857 0 3 0x80 nanoslp syz-executor 40452 220783 58857 0 3 0x4000080 kqread syz-executor 40452 22209 58857 0 3 0x4000080 fsleep syz-executor 89465 314963 746 0 3 0x82 nanoslp syz-executor 38713 437468 746 0 3 0x82 nanoslp syz-executor 86824 138061 746 0 3 0x82 nanoslp syz-executor 66093 371171 746 0 3 0x82 nanoslp syz-executor 40901 106751 746 0 3 0x82 nanoslp syz-executor 41156 180819 746 0 3 0x82 nanoslp syz-executor 26712 44256 746 0 3 0x82 nanoslp syz-executor 58857 159013 746 0 3 0x82 nanoslp syz-executor 746 389168 54250 0 3 0x82 kqread syz-executor 54250 501934 45680 0 3 0x10008a sigsusp ksh 45680 313354 59657 0 3 0x98 kqread sshd-session 59657 146999 99342 0 3 0x92 kqread sshd-session 35982 192311 1 0 3 0x100083 ttyin getty 99342 377497 1 0 3 0x88 kqread sshd 17674 256857 18947 74 3 0x1100092 bpf pflogd 18947 447314 1 0 3 0x80 sbwait pflogd 70274 341040 22641 73 3 0x1100090 kqread syslogd 22641 341131 1 0 3 0x100082 sbwait syslogd 75873 408605 1 0 3 0x100080 kqread resolvd 41975 319196 25713 77 3 0x100092 kqread dhcpleased 34195 262421 25713 77 3 0x100092 kqread dhcpleased 25713 287560 1 0 3 0x80 kqread dhcpleased 37981 426766 0 0 3 0x14200 bored smr 25695 321797 0 0 2 0x14200 zerothread 27270 327734 0 0 3 0x14200 aiodoned aiodoned 28901 426089 0 0 3 0x14200 syncer update 56093 466001 0 0 3 0x14200 cleaner cleaner 44916 225399 0 0 3 0x14200 reaper reaper 51973 60621 0 0 3 0x14200 pgdaemon pagedaemon 47515 97229 0 0 3 0x14200 bored viomb 59093 262675 0 0 3 0x40014200 acpi0 acpi0 44487 255984 0 0 3 0x40014200 idle1 56604 29432 0 0 3 0x14200 bored softnet7 62695 376655 0 0 3 0x14200 bored softnet6 37157 20231 0 0 3 0x14200 bored softnet5 44874 321327 0 0 3 0x14200 bored softnet4 88551 286641 0 0 3 0x14200 bored softnet3 37322 183965 0 0 3 0x14200 bored softnet2 39536 67369 0 0 3 0x14200 bored softnet1 55514 237480 0 0 3 0x14200 bored softnet0 85051 480830 0 0 3 0x14200 bored systqmp 46159 5263 0 0 3 0x14200 bored systq 3451 359549 0 0 3 0x14200 tmoslp softclockmp 69553 262379 0 0 3 0x40014200 tmoslp softclock 41107 199871 0 0 3 0x40014200 idle0 1 465541 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 (0xffffffff838f18a8) #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 22212 (syz-executor) thread 0xffff800037c09778 (37563) exclusive rwlock uobjlk r = 0 (0xfffffd80601dd5a8) #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 (0xffffffff838f18a8) #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 22212 (syz-executor) thread 0xffff800037c082b8 (79047) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839716e8) #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 (0xfffffd806b6b8458) #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 10211 11094K 12486K 166960K 11695 0 pcb 17 13K 14K 166960K 82 0 rtable 193 6K 6K 166960K 296 0 pf 37 18K 21K 166960K 67 0 ifaddr 41 7K 7K 166960K 53 0 ifgroup 58 2K 2K 166960K 77 0 sysctl 1 1K 9K 166960K 8 0 counters 74 37K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1503 0 iov 0 0K 16K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1401 88K 89K 166960K 1555 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 306 0 sigio 0 0K 0K 166960K 5 0 proc 72 115K 164K 166960K 550 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 32 0 in_multi 85 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 3 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 394 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 246 167K 185K 166960K 4483 0 UVM aobj 5 2K 2K 166960K 6 0 pinsyscall 43 86K 102K 166960K 1434 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 13 0K 2K 166960K 33 0 temp 41 8642K 8707K 166960K 15291 0 kqueue 15 22K 28K 166960K 51 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 51 0 48 1 0 1 1 0 8 0 rtentry 176 99 0 16 5 0 5 5 0 8 0 unpcb 144 200 0 172 2 0 2 2 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 80 0 75 4 0 4 4 0 8 3 arp 128 10 0 1 1 0 1 1 0 8 0 inpcb 328 309 0 300 7 0 7 7 0 8 6 nd6 144 16 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 2 1 0 1 1 0 8 0 pppxif 1504 1 0 0 1 0 1 1 0 8 0 pffrag 232 34 0 32 1 0 1 1 0 482 0 pffrnode 88 34 0 32 1 0 1 1 0 8 0 pffrent 40 130 0 128 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 23 0 0 1 0 1 1 0 8 0 pfstkey 128 23 0 0 1 0 1 1 0 8 0 pfstate 384 23 0 0 3 0 3 3 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 442 0 57 28 0 28 28 0 8 2 art_table 40 444 0 57 5 0 5 5 0 8 0 art_node 32 97 0 22 1 0 1 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1893 0 385 95 0 95 95 0 8 0 ffsino 296 1893 0 385 117 0 117 117 0 8 0 nchpl 144 2318 0 628 63 0 63 63 0 8 0 rtmask 32 2 0 1 1 0 1 1 0 8 0 uvmvnodes 80 2091 0 0 43 0 43 43 0 8 0 vnodes 216 2091 0 0 117 0 117 117 0 8 0 namei 1024 7507 0 7507 2 0 2 2 0 8 2 percpumem 16 57 0 5 1 0 1 1 0 8 0 kstatmem 264 36 0 8 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7902 0 7902 4 2 2 2 1 8 2 plimitpl 152 115 0 96 1 0 1 1 0 8 0 sigapl 424 623 0 568 7 0 7 7 0 8 0 knotepl 120 304 0 0 10 0 10 10 0 8 0 kqueuepl 224 145 0 132 5 0 5 5 0 8 4 pipepl 344 124 0 95 3 0 3 3 0 8 0 fdescpl 528 600 0 568 3 0 3 3 0 8 0 filepl 160 3009 0 2773 18 0 18 18 0 8 7 lockfpl 104 79 0 76 1 0 1 1 0 8 0 lockfspl 48 37 0 34 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 324 0 311 1 0 1 1 0 8 0 zombiepl 144 570 0 568 1 0 1 1 0 8 0 processpl 1248 623 0 568 5 0 5 5 0 8 0 procpl 664 904 0 841 6 0 6 6 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 752 563 0 523 11 0 11 11 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 142 0 0 9 0 9 9 0 8 0 bufpl 280 3310 0 122 228 0 228 228 0 8 0 anonpl 32 7526 0 0 61 0 61 61 0 246 0 amapchunkpl 152 13906 0 13396 34 3 31 31 0 158 9 amappl16 200 2183 0 2156 13 2 11 11 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 117 0 105 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 1318 0 1287 2 0 2 2 0 8 0 amappl11 160 51 0 36 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 265 0 265 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 110 0 98 1 0 1 1 0 8 0 amappl6 120 182 0 179 1 0 1 1 0 8 0 amappl5 112 165 0 155 1 0 1 1 0 8 0 amappl4 104 327 0 306 1 0 1 1 0 8 0 amappl3 96 2454 0 2338 4 0 4 4 0 8 0 amappl2 88 659 0 597 2 0 2 2 0 8 0 amappl1 80 9644 0 9034 16 0 16 16 0 8 0 amappl 88 3740 0 3568 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 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 600 0 568 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 600 0 568 1 0 1 1 0 8 0 vmmpekpl 168 6546 0 6509 2 0 2 2 0 8 0 vmmpepl 168 45227 0 43209 99 0 99 99 0 357 5 vmsppl 488 599 0 568 5 0 5 5 0 8 0 rwobjpl 80 17105 0 14068 66 0 66 66 0 8 1 pdppl 4096 1208 0 1136 106 30 76 86 0 8 4 pvpl 32 14417 0 0 118 1 117 117 0 265 0 pmappl 256 599 0 568 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 277 0 32 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(ffffffff83339e7c) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838f1898) at mtx_enter_try+0x1da mtx_enter(ffffffff838f1898) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fc5d60) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fc5d60) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80600eb490,0,ffff80003bc213a8,ffff80003bc2138c,0,2,159bbb34b330c171,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21440,ffff80003bc21428) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003bc215c0,ffff80003bc215f8,ffff80003bc21540) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b8287c0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003bc21750,200000000280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003bc21750) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x717a8fc019a0, 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(ffffffff839714e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839714e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806b8283f0,d08ebaba000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c46dc50,d08ebaba000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c46dc50) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7665cd5e9130, count: 7 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(ffffffff839714e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839714e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806b8283f0,d08ebaba000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c46dc50,d08ebaba000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c46dc50) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7665cd5e9130, count: -8