panic: mtx 0xffffffff839a0190: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *387336 63807 32767 0x10 0 1 syz-executor 420697 63807 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e6452) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839a0190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839a0190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800849ec50) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066ff73a8,1000,ffff80003c475a48,ffff80003c475a2c,0,2,bebcbfbc142797eb,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475c60,ffff80003c475c98,ffff80003c475ae0,ffff80003c475ac8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c475c60,ffff80003c475c98,ffff80003c475be0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bfbad48,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475df0,200000001480) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c475df0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c4e70663390, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: mtx 0xffffffff839a0190: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e6452) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839a0190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839a0190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800849ec50) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066ff73a8,1000,ffff80003c475a48,ffff80003c475a2c,0,2,bebcbfbc142797eb,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475c60,ffff80003c475c98,ffff80003c475ae0,ffff80003c475ac8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c475c60,ffff80003c475c98,ffff80003c475be0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bfbad48,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475df0,200000001480) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c475df0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c4e70663390, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c475790 rbx 0xffff8000299dedcf rdx 0 rcx 0xffff80003c4479c8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x220f4341a21149c3 r11 0xa15200c8f9f3964f r12 0xffff8000299debd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81e89085 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c475780 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=387336 pid=63807 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=0xffff80003c446028,0xffff80003c446f98 process=0xffff800039011c10 user=0xffff80003c470000, vmspace=0xfffffd806bfbad48 estcpu=36, cpticks=2, pctcpu=0.0, user=2, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52564 133893 55034 32767 2 0x10 syz-executor 52564 354071 55034 32767 3 0x4000090 fsleep syz-executor 52564 102439 55034 32767 3 0x4000090 fsleep syz-executor 52564 371418 55034 32767 2 0x4000010 syz-executor *63807 387336 84995 32767 7 0x10 syz-executor 63807 385029 84995 32767 3 0x4000090 fsleep syz-executor 63807 493728 84995 32767 3 0x4000010 biowait syz-executor 63807 420697 84995 32767 7 0x4000010 syz-executor 74963 162041 78209 32767 2 0x10 syz-executor 74963 33999 78209 32767 3 0x4000090 pipewr syz-executor 37415 515251 77367 32767 2 0x10 syz-executor 37415 144617 77367 32767 3 0x4000090 fifor syz-executor 77097 273991 68534 32767 2 0x10 syz-executor 77097 473149 68534 32767 3 0x4000090 fsleep syz-executor 12694 447086 99302 32767 3 0x90 nanoslp syz-executor 12694 2778 99302 32767 3 0x4000090 kqsel syz-executor 12694 323885 99302 32767 3 0x4000090 fsleep syz-executor 84635 206131 47717 32767 2 0x10 syz-executor 84635 85196 47717 32767 3 0x4000090 fsleep syz-executor 84635 108108 47717 32767 3 0x4000090 fsleep syz-executor 23179 95918 0 0 3 0x14200 bored sosplice 88442 387703 83350 32767 3 0x90 nanoslp syz-executor 88442 489411 83350 32767 3 0x4000090 sbwait syz-executor 88442 421234 83350 32767 3 0x4000090 fsleep syz-executor 68534 492186 62178 32767 2 0x10 syz-executor 77367 143086 14270 32767 3 0x90 nanoslp syz-executor 55034 269847 29347 32767 3 0x90 nanoslp syz-executor 47717 109907 72076 32767 2 0x10 syz-executor 84995 65471 42463 32767 3 0x90 nanoslp syz-executor 99302 257732 87479 32767 3 0x90 nanoslp syz-executor 83350 133768 66540 32767 3 0x90 nanoslp syz-executor 78209 275103 55169 32767 3 0x90 nanoslp syz-executor 66540 351962 92454 0 3 0x82 wait syz-executor 14270 521062 92454 0 3 0x82 wait syz-executor 29347 287624 92454 0 3 0x82 wait syz-executor 62178 276608 92454 0 3 0x82 wait syz-executor 87479 298800 92454 0 3 0x82 wait syz-executor 55169 395226 92454 0 3 0x82 wait syz-executor 72076 415625 92454 0 3 0x82 wait syz-executor 42463 403298 92454 0 3 0x82 wait syz-executor 92454 377109 6312 0 3 0x82 kqread syz-executor 6312 489669 26085 0 3 0x10008a sigsusp ksh 26085 189257 91356 0 3 0x98 kqread sshd-session 91356 172018 92548 0 3 0x92 kqread sshd-session 18678 184631 1 0 3 0x100083 ttyin getty 92548 174630 1 0 3 0x88 kqread sshd 61463 504194 97278 73 3 0x1100090 kqread syslogd 97278 364234 1 0 3 0x100082 sbwait syslogd 12776 458810 1 0 3 0x100080 kqread resolvd 89775 234859 66426 77 3 0x100092 kqread dhcpleased 22854 392466 66426 77 3 0x100092 kqread dhcpleased 66426 328512 1 0 3 0x80 kqread dhcpleased 52501 423558 0 0 3 0x14200 bored smr 94550 56707 0 0 2 0x14200 zerothread 12614 179551 0 0 3 0x14200 aiodoned aiodoned 56118 64132 0 0 3 0x14200 syncer update 57373 9288 0 0 3 0x14200 cleaner cleaner 33700 101184 0 0 3 0x14200 reaper reaper 7851 307657 0 0 3 0x14200 pgdaemon pagedaemon 22346 180717 0 0 3 0x14200 bored viomb 73039 39516 0 0 3 0x40014200 acpi0 acpi0 91968 145611 0 0 3 0x40014200 idle1 3064 336288 0 0 3 0x14200 bored softnet3 6017 508901 0 0 3 0x14200 bored softnet2 38881 8637 0 0 3 0x14200 bored softnet1 32636 151032 0 0 3 0x14200 bored softnet0 10966 256347 0 0 3 0x14200 bored systqmp 93288 454153 0 0 3 0x14200 bored systq 77109 323969 0 0 3 0x14200 tmoslp softclockmp 61379 25381 0 0 3 0x40014200 tmoslp softclock 10300 408420 0 0 3 0x40014200 idle0 1 325191 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839a01a0) #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 63807 (syz-executor) thread 0xffff80003c4479c8 (387336) exclusive rwlock uobjlk r = 0 (0xfffffd8067dbfb20) #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 (0xffffffff839a01a0) #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 63807 (syz-executor) thread 0xffff8000ffff14a0 (493728) exclusive rrwlock inode r = 0 (0xfffffd806e045648) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 10957K 10965K 166960K 11288 0 pcb 17 12K 12K 166960K 17 0 rtable 238 6K 6K 166960K 348 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 3K 166960K 2 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 1 2K 4K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1356 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 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 182 0 sigio 1 0K 0K 166960K 3 0 proc 58 79K 115K 166960K 476 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 2 0K 0K 166960K 13 0 in_multi 99 7K 7K 166960K 101 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 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 335 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 270 176K 190K 166960K 3120 0 UVM aobj 7 4K 4K 166960K 7 0 pinsyscall 47 94K 114K 166960K 1174 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 27 2K 2K 166960K 27 0 temp 37 8678K 8742K 166960K 3755 0 kqueue 14 22K 24K 166960K 35 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 34 0 30 1 0 1 1 0 8 0 rtentry 176 113 0 1 6 0 6 6 0 8 0 unpcb 144 64 0 35 2 0 2 2 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 60 0 55 4 0 4 4 0 8 3 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 384 127 0 117 2 0 2 2 0 8 1 nd6 144 26 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 256 457 0 0 29 0 29 29 0 8 0 art_table 32 458 0 0 4 0 4 4 0 8 0 art_node 16 112 0 10 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1605 0 94 95 0 95 95 0 8 0 ffsino 288 1605 0 94 108 0 108 108 0 8 0 nchpl 144 1848 0 166 63 0 63 63 0 8 0 uvmvnodes 80 1686 0 0 35 0 35 35 0 8 0 vnodes 216 1686 0 0 94 0 94 94 0 8 0 namei 1024 5511 0 5511 2 0 2 2 0 8 2 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6104 0 6102 4 1 3 3 1 8 2 plimitpl 152 36 0 12 1 0 1 1 0 8 0 sigapl 424 453 0 396 7 0 7 7 0 8 0 futexpl 64 613 0 605 1 0 1 1 0 8 0 knotepl 120 286 0 0 9 0 9 9 0 8 0 kqueuepl 224 35 0 24 1 0 1 1 0 8 0 pipepl 336 98 0 70 3 0 3 3 0 8 0 fdescpl 520 434 0 396 3 0 3 3 0 8 0 filepl 160 1651 0 1423 12 0 12 12 0 8 2 lockfpl 104 16 0 13 1 0 1 1 0 8 0 lockfspl 48 9 0 6 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 104 219 0 200 1 0 1 1 0 8 0 zombiepl 144 396 0 396 1 0 1 1 0 8 1 processpl 1192 453 0 396 5 0 5 5 0 8 0 procpl 656 518 0 446 6 0 6 6 0 8 0 sockpl 728 226 0 183 4 0 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 248 0 0 16 0 16 16 0 8 0 bufpl 280 2407 0 117 164 0 164 164 0 8 0 anonpl 32 5264 0 0 43 0 43 43 0 246 0 amapchunkpl 152 9220 0 8620 29 0 29 29 0 158 5 amappl16 200 2017 0 1995 5 0 5 5 0 8 3 amappl15 192 4 0 4 1 0 1 1 0 8 1 amappl14 184 122 0 112 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 0 1 1 0 8 1 amappl12 168 1026 0 988 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 0 1 1 0 8 1 amappl9 144 261 0 261 1 0 1 1 0 8 1 amappl8 136 22 0 21 1 0 1 1 0 8 0 amappl7 128 91 0 81 1 0 1 1 0 8 0 amappl6 120 170 0 166 1 0 1 1 0 8 0 amappl5 112 114 0 108 1 0 1 1 0 8 0 amappl4 104 273 0 257 1 0 1 1 0 8 0 amappl3 96 1444 0 1304 4 0 4 4 0 8 0 amappl2 88 594 0 542 2 0 2 2 0 8 0 amappl1 80 7872 0 7297 13 0 13 13 0 8 0 amappl 88 2504 0 2301 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 434 0 396 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 396 1 0 1 1 0 8 0 vmmpekpl 168 5000 0 4967 2 0 2 2 0 8 0 vmmpepl 168 33931 0 31780 95 0 95 95 0 357 1 vmsppl 480 433 0 396 7 1 6 6 0 8 1 rwobjpl 72 13943 0 11396 47 0 47 47 0 8 0 pdppl 4096 876 0 792 106 10 96 96 0 8 12 pvpl 32 11316 0 0 92 0 92 92 0 265 0 pmappl 256 433 0 396 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 13 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837d8ff0) 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(ffffffff839b2a18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c49ddf0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff837d8ff0) 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(ffffffff839b2a18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c49ddf0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839b2a18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e6452) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839a0190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839a0190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800849ec50) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066ff73a8,1000,ffff80003c475a48,ffff80003c475a2c,0,2,bebcbfbc142797eb,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475c60,ffff80003c475c98,ffff80003c475ae0,ffff80003c475ac8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c475c60,ffff80003c475c98,ffff80003c475be0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bfbad48,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475df0,200000001480) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c475df0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c4e70663390, count: 2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e6452) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839a0190) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839a0190) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800849ec50) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800849ec50) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066ff73a8,1000,ffff80003c475a48,ffff80003c475a2c,0,2,bebcbfbc142797eb,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c475c60,ffff80003c475c98,ffff80003c475ae0,ffff80003c475ac8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c475c60,ffff80003c475c98,ffff80003c475be0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806bfbad48,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c475df0,200000001480) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c475df0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c4e70663390, count: -13