login: panic: mtx 0xffffffff83987ea0: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *517842 10494 32767 0x10 0 0 syz-executor 485486 18725 0 0x14000 0x200 1 zerothread db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dc301) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83987ea0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83987ea0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008264f90) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8073697858,1000,ffff80003c45daf8,ffff80003c45dad4,0,2,9e9dc129c4c7d8fa,ffff80003c45dd50) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45db80,ffff80003c45db88) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45dc90) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bea4988,200000001000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45dea0,200000001080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45dea0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x737041e6f5c0, 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 0xffffffff83987ea0: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dc301) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83987ea0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83987ea0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008264f90) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8073697858,1000,ffff80003c45daf8,ffff80003c45dad4,0,2,9e9dc129c4c7d8fa,ffff80003c45dd50) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45db80,ffff80003c45db88) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45dc90) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bea4988,200000001000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45dea0,200000001080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45dea0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x737041e6f5c0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c45d840 rbx 0xffffffff83828dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c4562c0 rax 0xffffffff83827ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd830176c0f00e9b9 r11 0x3f6b51645f0c67e3 r12 0xffffffff83828bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82d2f565 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45d830 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=517842 pid=10494 tcnt=4 stat=onproc flags process=10 proc=0 runpri=69, usrpri=69, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c456f90,0xffff80003c456040 process=0xffff80003bc28e18 user=0xffff80003c458000, vmspace=0xfffffd806bea4988 estcpu=19, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9679 127805 36014 0 2 0x40 syz-executor 36014 503061 27819 0 3 0x80 ppwait syz-executor *10494 517842 23860 32767 7 0x10 syz-executor 10494 72370 23860 32767 2 0x4000010 syz-executor 10494 318507 23860 32767 3 0x4000010 biowait syz-executor 10494 85027 23860 32767 3 0x4000090 fsleep syz-executor 27819 352745 37268 0 3 0x82 wait syz-executor 89461 290693 7156 0 3 0x82 sbwait sshd-session 62815 150442 0 0 3 0x14200 bored sosplice 58605 84347 35591 32767 3 0x90 piperd syz-executor 31193 395884 34072 32767 3 0x90 piperd syz-executor 23860 64387 53089 32767 3 0x90 nanoslp syz-executor 84246 463073 52585 32767 3 0x90 piperd syz-executor 87946 245770 22003 32767 3 0x90 nanoslp syz-executor 56141 304672 52765 32767 3 0x90 piperd syz-executor 34072 25086 37268 0 3 0x82 wait syz-executor 22003 401856 37268 0 3 0x82 wait syz-executor 52585 219060 37268 0 3 0x82 wait syz-executor 52765 442268 37268 0 3 0x82 wait syz-executor 35591 500258 37268 0 3 0x82 wait syz-executor 53089 70413 37268 0 3 0x82 wait syz-executor 37268 379401 42133 0 3 0x82 nanoslp syz-executor 42133 5188 44164 0 3 0x10008a sigsusp ksh 44164 236523 50311 0 3 0x98 kqread sshd-session 50311 159596 7156 0 3 0x92 kqread sshd-session 66061 415827 1 0 3 0x100083 ttyin getty 7156 368514 1 0 3 0x88 kqread sshd 559 366445 311 73 3 0x1100090 kqread syslogd 311 519991 1 0 3 0x100082 sbwait syslogd 17204 370318 1 0 3 0x100080 kqread resolvd 38377 251505 37527 77 3 0x100092 kqread dhcpleased 23649 422084 37527 77 3 0x100092 kqread dhcpleased 37527 487113 1 0 3 0x80 kqread dhcpleased 96195 246760 0 0 3 0x14200 bored smr 18725 485486 0 0 7 0x14200 zerothread 46480 511642 0 0 3 0x14200 aiodoned aiodoned 97251 147502 0 0 3 0x14200 syncer update 75393 414812 0 0 3 0x14200 cleaner cleaner 79322 332797 0 0 3 0x14200 reaper reaper 18987 47118 0 0 3 0x14200 pgdaemon pagedaemon 86434 389259 0 0 3 0x14200 bored viomb 73393 13729 0 0 3 0x40014200 acpi0 acpi0 39611 19187 0 0 3 0x40014200 idle1 44237 427432 0 0 3 0x14200 bored softnet3 85589 72023 0 0 3 0x14200 bored softnet2 22615 449002 0 0 3 0x14200 bored softnet1 15477 78581 0 0 3 0x14200 bored softnet0 38873 163478 0 0 3 0x14200 bored systqmp 41475 492191 0 0 3 0x14200 bored systq 43868 71435 0 0 3 0x14200 tmoslp softclockmp 69612 443587 0 0 3 0x40014200 tmoslp softclock 24449 84488 0 0 3 0x40014200 idle0 1 126413 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 (0xffffffff83987eb0) #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+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 10494 (syz-executor) thread 0xffff80003c4562c0 (517842) exclusive rwlock uobjlk r = 0 (0xfffffd8061895140) #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+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 (0xffffffff83987eb0) #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+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 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 10494 (syz-executor) thread 0xffff80002a2c47d8 (318507) exclusive rrwlock inode r = 0 (0xfffffd8063312e28) #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:2920 #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 Process 10494 (syz-executor) thread 0xffff80002a2c5738 (85027) exclusive rwlock futexpl r = 0 (0xffffffff838ff1e8) #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 pool_get+0x10b sys/kern/subr_pool.c:583 #3 futex_get+0x309 sys/kern/sys_futex.c:171 #4 futex_wait+0x328 sys/kern/sys_futex.c:-1 #5 sys_futex+0x149 sys/kern/sys_futex.c:101 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock futex r = 0 (0xffffffff8380b698) #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 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10181 10951K 10965K 166960K 11264 0 pcb 17 12K 12K 166960K 17 0 rtable 196 5K 6K 166960K 365 0 pf 29 16K 16K 166960K 33 0 ifaddr 35 6K 7K 166960K 45 0 ifgroup 46 2K 2K 166960K 54 0 sysctl 1 1K 1K 166960K 1 0 counters 62 36K 36K 166960K 66 0 ioctlops 0 0K 2K 166960K 98 0 iov 0 0K 16K 166960K 75 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1540 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 121K 166960K 423 0 sigio 0 0K 0K 166960K 2 0 proc 58 79K 115K 166960K 513 0 subproc 63 3K 4K 166960K 252 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 36 0 in_multi 77 5K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 392 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 215 167K 192K 166960K 4892 0 UVM aobj 13 2K 2K 166960K 13 0 pinsyscall 42 84K 112K 166960K 1437 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 10 0K 2K 166960K 28 0 temp 38 8680K 8744K 166960K 4817 0 kqueue 13 20K 30K 166960K 59 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 52 0 49 1 0 1 1 0 8 0 rtentry 176 119 0 28 6 0 6 6 0 8 0 unpcb 144 294 0 273 6 0 6 6 0 8 5 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpcb 808 109 0 102 2 0 2 2 0 8 1 arp 128 20 0 4 1 0 1 1 0 8 0 inpcb 384 372 0 359 10 7 3 9 0 8 1 nd6 144 30 0 11 1 0 1 1 0 8 0 kcovpl 48 28 0 21 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 466 0 98 29 0 29 29 0 8 4 art_table 32 467 0 98 4 0 4 4 0 8 0 art_node 16 118 0 35 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1860 0 330 96 0 96 96 0 8 0 ffsino 288 1860 0 330 110 0 110 110 0 8 0 nchpl 144 2352 0 659 63 0 63 63 0 8 0 uvmvnodes 80 2121 0 0 44 0 44 44 0 8 0 vnodes 216 2121 0 0 118 0 118 118 0 8 0 namei 1024 7640 0 7640 1 0 1 1 0 8 1 percpumem 16 48 0 2 1 0 1 1 0 8 0 kstatmem 264 24 0 4 2 0 2 2 0 8 0 scxspl 216 8199 0 8197 10 2 8 8 1 8 7 plimitpl 152 181 0 159 3 1 2 2 0 8 1 sigapl 424 658 0 607 8 1 7 7 0 8 0 futexpl 64 3132 0 3131 1 0 1 1 0 8 0 knotepl 120 288 0 0 9 0 9 9 0 8 0 kqueuepl 224 69 0 60 1 0 1 1 0 8 0 pipepl 336 209 0 182 6 0 6 6 0 8 3 fdescpl 520 639 0 607 3 0 3 3 0 8 0 filepl 160 3198 0 2995 17 3 14 14 0 8 4 lockfpl 104 66 0 63 1 0 1 1 0 8 0 lockfspl 48 31 0 28 1 0 1 1 0 8 0 sessionpl 144 44 0 28 1 0 1 1 0 8 0 pgrppl 48 74 0 51 1 0 1 1 0 8 0 ucredpl 104 363 0 346 1 0 1 1 0 8 0 zombiepl 144 608 0 607 1 0 1 1 0 8 0 processpl 1192 658 0 607 5 0 5 5 0 8 0 procpl 656 1010 0 956 7 1 6 6 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 728 721 0 687 21 6 15 15 0 8 11 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1170 0 0 74 0 74 74 0 8 0 bufpl 280 2889 0 112 199 0 199 199 0 8 0 anonpl 32 5477 0 0 45 0 45 45 0 246 0 amapchunkpl 152 15397 0 14977 28 1 27 28 0 158 7 amappl16 200 1693 0 1673 5 3 2 5 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 112 0 101 1 0 1 1 0 8 0 amappl13 176 5 0 5 2 2 0 1 0 8 0 amappl12 168 1236 0 1206 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 78 0 77 1 0 1 1 0 8 0 amappl7 128 98 0 87 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 123 0 116 1 0 1 1 0 8 0 amappl4 104 284 0 267 1 0 1 1 0 8 0 amappl3 96 2684 0 2585 4 0 4 4 0 8 0 amappl2 88 635 0 572 2 0 2 2 0 8 0 amappl1 80 9331 0 8689 15 1 14 15 0 8 0 amappl 88 4198 0 4053 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 639 0 607 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 639 0 607 1 0 1 1 0 8 0 vmmpekpl 168 7286 0 7240 3 0 3 3 0 8 0 vmmpepl 168 46494 0 44536 101 5 96 101 0 357 2 vmsppl 480 638 0 607 6 0 6 6 0 8 0 rwobjpl 72 16774 0 13737 59 2 57 57 0 8 1 pdppl 4096 1285 0 1214 119 40 79 95 0 8 8 pvpl 32 12080 0 0 99 1 98 99 0 265 0 pmappl 256 638 0 607 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 469 0 43 13 0 13 13 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(ffffffff833dc301) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83987ea0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83987ea0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008264f90) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008264f90) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8073697858,1000,ffff80003c45daf8,ffff80003c45dad4,0,2,9e9dc129c4c7d8fa,ffff80003c45dd50) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45db80,ffff80003c45db88) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c45dd18,ffff80003c45dd50,ffff80003c45dc90) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bea4988,200000001000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45dea0,200000001080) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c45dea0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x737041e6f5c0, 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 pagezero() at pagezero+0x1c end trace frame: 0x0, count: 11 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 pagezero() at pagezero+0x1c end trace frame: 0x0, count: -4