panic: mtx 0xffffffff839b8d80: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 2303 64770 32767 0x10 0 0 syz-executor 391998 96833 0 0x14000 0x200 1 zerothread db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833315e1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b8d80) at mtx_enter_try+0x1da mtx_enter(ffffffff839b8d80) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fe6758) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80603f51e0,0,ffff8000374251f8,ffff8000374251dc,0,2,9d0c1453bf6292d2,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800037425410,ffff800037425448,ffff800037425290,ffff800037425278) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff800037425410,ffff800037425448,ffff800037425390) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a8f6ba0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000374255a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff8000374255a0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7bd0f2dbcdf0, 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 0xffffffff839b8d80: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833315e1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b8d80) at mtx_enter_try+0x1da mtx_enter(ffffffff839b8d80) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fe6758) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80603f51e0,0,ffff8000374251f8,ffff8000374251dc,0,2,9d0c1453bf6292d2,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800037425410,ffff800037425448,ffff800037425290,ffff800037425278) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff800037425410,ffff800037425448,ffff800037425390) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a8f6ba0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000374255a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff8000374255a0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7bd0f2dbcdf0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800037424f30 rbx 0xffffffff83851ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff800037427cb0 rax 0xffffffff83850ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf65e98b6b9b258c6 r11 0x8be3c1d509257142 r12 0xffffffff83851be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff810aca85 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037424f20 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=2303 pid=64770 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=0xffff800037426fb8,0xffff800037426800 process=0xffff800035814ed0 user=0xffff800037420000, vmspace=0xfffffd806a8f6ba0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20111 385910 18824 32767 2 0x10 syz-executor *64770 2303 4803 32767 7 0x10 syz-executor 64770 10529 4803 32767 3 0x4000090 fsleep syz-executor 64770 409215 4803 32767 3 0x4000010 biowait syz-executor 64770 144721 4803 32767 3 0x4000090 fsleep syz-executor 33505 56169 29662 32767 3 0x90 nanoslp syz-executor 33505 91196 29662 32767 3 0x4000090 fsleep syz-executor 73979 496707 92686 32767 2 0x10 syz-executor 73979 39281 92686 32767 3 0x4000090 fsleep syz-executor 4963 440032 41965 32767 3 0x90 nanoslp syz-executor 4963 45807 41965 32767 3 0x4000090 fifor syz-executor 4963 112810 41965 32767 3 0x4000090 fsleep syz-executor 4963 73546 41965 32767 3 0x4000090 fsleep syz-executor 28727 470074 89788 32767 3 0x90 nanoslp syz-executor 28727 195404 89788 32767 3 0x4000090 sbwait syz-executor 28727 127516 89788 32767 3 0x4000090 fsleep syz-executor 65738 109835 32909 32767 3 0x90 nanoslp syz-executor 65738 239696 32909 32767 3 0x4000090 fsleep syz-executor 65738 414560 32909 32767 3 0x4000090 pipewr syz-executor 49921 283704 0 0 3 0x14200 bored sosplice 4803 37184 81505 32767 3 0x90 nanoslp syz-executor 89788 389996 2511 32767 3 0x90 nanoslp syz-executor 30182 65727 73233 32767 3 0x90 nanoslp syz-executor 29662 451874 91236 32767 3 0x90 nanoslp syz-executor 32909 249241 79833 32767 3 0x90 nanoslp syz-executor 41965 224574 10844 32767 3 0x90 nanoslp syz-executor 92686 99074 46415 32767 3 0x90 nanoslp syz-executor 18824 411907 78384 32767 3 0x90 nanoslp syz-executor 81505 149255 89743 0 3 0x82 wait syz-executor 79833 358914 89743 0 3 0x82 wait syz-executor 10844 75568 89743 0 3 0x82 wait syz-executor 2511 214883 89743 0 3 0x82 wait syz-executor 46415 64327 89743 0 3 0x82 wait syz-executor 73233 486440 89743 0 3 0x82 wait syz-executor 78384 17486 89743 0 3 0x82 wait syz-executor 91236 473964 89743 0 3 0x82 wait syz-executor 89743 90933 59939 0 3 0x82 kqread syz-executor 59939 461086 59713 0 3 0x10008a sigsusp ksh 59713 478383 88372 0 3 0x98 kqread sshd-session 88372 114889 6581 0 3 0x92 kqread sshd-session 8512 418088 1 0 3 0x100083 ttyin getty 6581 127014 1 0 3 0x88 kqread sshd 32452 285691 61622 73 3 0x1100090 kqread syslogd 61622 485081 1 0 3 0x100082 sbwait syslogd 40462 457094 1 0 3 0x100080 kqread resolvd 38236 401810 76087 77 3 0x100092 kqread dhcpleased 99113 195279 76087 77 3 0x100092 kqread dhcpleased 76087 332968 1 0 3 0x80 kqread dhcpleased 93006 43337 0 0 3 0x14200 bored smr 96833 391998 0 0 7 0x14200 zerothread 23391 197072 0 0 3 0x14200 aiodoned aiodoned 10258 72868 0 0 3 0x14200 syncer update 24588 247111 0 0 3 0x14200 cleaner cleaner 7023 329760 0 0 3 0x14200 reaper reaper 47302 112456 0 0 3 0x14200 pgdaemon pagedaemon 85079 459841 0 0 3 0x14200 bored viomb 58216 256558 0 0 3 0x40014200 acpi0 acpi0 31588 10556 0 0 3 0x40014200 idle1 76661 154925 0 0 3 0x14200 bored softnet7 19366 333068 0 0 3 0x14200 bored softnet6 86821 192698 0 0 3 0x14200 bored softnet5 30015 386071 0 0 3 0x14200 bored softnet4 92776 220169 0 0 3 0x14200 bored softnet3 53017 364240 0 0 3 0x14200 bored softnet2 95205 216962 0 0 3 0x14200 bored softnet1 4926 25836 0 0 3 0x14200 bored softnet0 77568 38741 0 0 3 0x14200 bored systqmp 4235 165075 0 0 3 0x14200 bored systq 84806 119738 0 0 3 0x14200 tmoslp softclockmp 49593 202881 0 0 3 0x40014200 tmoslp softclock 16415 69900 0 0 3 0x40014200 idle0 1 364015 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 (0xffffffff839b8d90) #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 64770 (syz-executor) thread 0xffff800037427cb0 (2303) exclusive rwlock uobjlk r = 0 (0xfffffd806abc37f8) #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 (0xffffffff839b8d90) #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 64770 (syz-executor) thread 0xffff800037427a18 (409215) exclusive rrwlock inode r = 0 (0xfffffd806a3a9c68) #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 10195 10956K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 209 5K 6K 166960K 258 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 36K 166960K 76 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1362 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 14 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 257 0 sigio 0 0K 0K 166960K 4 0 proc 58 99K 131K 166960K 495 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 31 0 in_multi 99 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 350 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 258 160K 172K 166960K 3802 0 UVM aobj 38 2K 2K 166960K 38 0 pinsyscall 47 94K 110K 166960K 1262 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 11 0K 2K 166960K 27 0 temp 38 8642K 8706K 166960K 4118 0 kqueue 13 20K 32K 166960K 56 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 40 0 36 1 0 1 1 0 8 0 rtentry 176 97 0 1 5 0 5 5 0 8 0 unpcb 144 105 0 88 1 0 1 1 0 8 0 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 68 0 60 2 0 2 2 0 8 1 arp 128 11 0 0 1 0 1 1 0 8 0 inpcb 328 190 0 177 2 0 2 2 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 17 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 256 440 0 0 28 0 28 28 0 8 0 art_table 40 441 0 0 5 0 5 5 0 8 0 art_node 32 97 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 35 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1706 0 201 95 0 95 95 0 8 0 ffsino 296 1706 0 201 116 0 116 116 0 8 0 nchpl 144 2054 0 378 63 0 63 63 0 8 0 uvmvnodes 80 1787 0 0 37 0 37 37 0 8 0 vnodes 216 1787 0 0 100 0 100 100 0 8 0 namei 1024 6067 0 6067 2 0 2 2 0 8 2 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 7025 0 7023 3 2 1 2 1 8 0 plimitpl 152 59 0 34 2 0 2 2 0 8 0 sigapl 424 535 0 474 8 0 8 8 0 8 0 knotepl 120 352 0 0 11 0 11 11 0 8 0 kqueuepl 224 94 0 83 3 0 3 3 0 8 2 pipepl 344 107 0 79 3 0 3 3 0 8 0 fdescpl 528 512 0 474 3 0 3 3 0 8 0 filepl 160 1993 0 1770 11 0 11 11 0 8 1 lockfpl 104 21 0 18 1 0 1 1 0 8 0 lockfspl 48 12 0 9 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 36 0 12 1 0 1 1 0 8 0 ucredpl 104 283 0 264 1 0 1 1 0 8 0 zombiepl 144 475 0 474 1 0 1 1 0 8 0 processpl 1248 535 0 474 7 1 6 6 0 8 0 procpl 664 734 0 661 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 337 0 303 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 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 256 271 0 0 17 0 17 17 0 8 0 bufpl 280 2951 0 116 203 0 203 203 0 8 0 anonpl 32 7529 0 0 61 0 61 61 0 246 0 amapchunkpl 152 11851 0 11273 33 3 30 30 0 158 5 amappl16 200 2403 0 2377 15 0 15 15 0 8 12 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 111 0 101 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1108 0 1071 2 0 2 2 0 8 0 amappl11 160 78 0 67 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 135 0 124 1 0 1 1 0 8 0 amappl6 120 172 0 168 1 0 1 1 0 8 0 amappl5 112 113 0 107 1 0 1 1 0 8 0 amappl4 104 261 0 248 1 0 1 1 0 8 0 amappl3 96 1950 0 1815 4 0 4 4 0 8 0 amappl2 88 629 0 571 2 0 2 2 0 8 0 amappl1 80 8656 0 8079 15 0 15 15 0 8 0 amappl 88 3161 0 2968 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 37 0 0 1 0 1 1 0 8 0 uaddrrnd 24 512 0 474 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 512 0 474 1 0 1 1 0 8 0 vmmpekpl 168 5658 0 5626 2 0 2 2 0 8 0 vmmpepl 168 39493 0 37333 106 0 106 106 0 357 11 vmsppl 488 511 0 474 7 1 6 6 0 8 0 rwobjpl 80 15703 0 13023 59 0 59 59 0 8 2 pdppl 4096 1032 0 948 106 22 84 96 0 8 0 pvpl 32 16682 0 0 136 1 135 135 0 265 0 pmappl 256 511 0 474 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 25 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(ffffffff833315e1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839b8d80) at mtx_enter_try+0x1da mtx_enter(ffffffff839b8d80) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007fe6758) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007fe6758) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd80603f51e0,0,ffff8000374251f8,ffff8000374251dc,0,2,9d0c1453bf6292d2,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800037425410,ffff800037425448,ffff800037425290,ffff800037425278) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff800037425410,ffff800037425448,ffff800037425390) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a8f6ba0,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000374255a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff8000374255a0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7bd0f2dbcdf0, 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