panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 144 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 31900 47558 0 0x8000002 0 0 syz-executor.4 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8292bfde) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e13f2,ffffffff8282f89d,90,ffffffff828e4a6a) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8005f35880,fffffd8060e69048,6c000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8060e69048,6c000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8060e69018,1b30221000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8060e69018,1b30221000,69352000,3,20) at pmap_enter+0x2b0 uvm_fault_lower_lookup(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0) at uvm_fault_lower_lookup+0x25a sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0,0) at uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8055ced840,1b30220000,0,1) at uvm_fault+0x22a sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002f52b0e0,1b30220000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002f52b0e0) at usertrap+0x20e sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b168a2698c0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 144 ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8292bfde) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e13f2,ffffffff8282f89d,90,ffffffff828e4a6a) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8005f35880,fffffd8060e69048,6c000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8060e69048,6c000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8060e69018,1b30221000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8060e69018,1b30221000,69352000,3,20) at pmap_enter+0x2b0 uvm_fault_lower_lookup(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0) at uvm_fault_lower_lookup+0x25a sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0,0) at uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8055ced840,1b30220000,0,1) at uvm_fault+0x22a sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002f52b0e0,1b30220000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002f52b0e0) at usertrap+0x20e sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b168a2698c0, count: -13 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002f52a9d0 rbx 0x6c000 acpi_pdirpa+0x57e71 rdx 0 rcx 0 rax 0xffff80002a6cef88 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf21af115665a83f9 r11 0xd87f83f7a57bc58c r12 0 r13 0x6c000 acpi_pdirpa+0x57e71 r14 0 r15 0x1 rip 0xffffffff821bdc7c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002f52a9c0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.4) tid=31900 pid=47558 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=32, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a6ce548,0xffff80002f55a568 process=0xffff80002d940888 user=0xffff80002f526000, vmspace=0xfffffd8055ced840 estcpu=35, cpticks=1, pctcpu=0.18, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89607 35156 56380 0 2 0x8000000 syz-executor.0 89607 434063 56380 0 3 0xc000080 fsleep syz-executor.0 84715 514706 51818 0 2 0x8000000 syz-executor.2 84715 477161 51818 0 3 0xc000080 fsleep syz-executor.2 12392 122895 46279 0 2 0x8000000 syz-executor.3 12392 113802 46279 0 3 0xc000080 fsleep syz-executor.3 94631 147094 74079 0 2 0x8000000 syz-executor.5 94631 410534 74079 0 3 0xc000080 netio syz-executor.5 59276 397088 19422 0 2 0x8000000 syz-executor.6 59276 140544 19422 0 3 0xc000080 fsleep syz-executor.6 67552 448088 33350 0 2 0x8000000 syz-executor.7 67552 429484 33350 0 3 0xc000080 fifor syz-executor.7 67552 226055 33350 0 3 0xc000080 fifor syz-executor.7 84373 452560 47558 0 2 0x8000480 syz-executor.4 84373 137358 47558 0 3 0xc000080 fifor syz-executor.4 84373 30293 47558 0 3 0xc000080 fsleep syz-executor.4 51818 418674 32058 0 2 0x8000482 syz-executor.2 *47558 31900 32058 0 7 0x8000002 syz-executor.4 33350 232902 32058 0 3 0x8000082 nanoslp syz-executor.7 19422 387504 32058 0 2 0x8000482 syz-executor.6 74079 393295 32058 0 2 0x8000482 syz-executor.5 68772 312454 0 0 3 0x14200 acct acct 46279 60705 32058 0 2 0x8000482 syz-executor.3 57671 345529 32058 0 3 0x8000002 biowait syz-executor.1 45801 421051 1 0 3 0x18100083 ttyin getty 56380 499403 32058 0 2 0x8000482 syz-executor.0 44672 340566 0 0 3 0x14280 nfsidl nfsio 36624 110869 0 0 3 0x14280 nfsidl nfsio 73282 186090 0 0 3 0x14280 nfsidl nfsio 72461 51155 0 0 3 0x14280 nfsidl nfsio 26584 78622 0 0 3 0x14280 nfsidl nfsio 83361 65701 0 0 3 0x14280 nfsidl nfsio 78577 275083 0 0 3 0x14280 nfsidl nfsio 66159 305123 0 0 3 0x14280 nfsidl nfsio 35848 71750 0 0 3 0x14280 nfsidl nfsio 30393 387920 0 0 3 0x14280 nfsidl nfsio 39778 343092 0 0 3 0x14280 nfsidl nfsio 36952 312976 0 0 3 0x14280 nfsidl nfsio 36356 405054 0 0 3 0x14280 nfsidl nfsio 88023 66037 0 0 3 0x14280 nfsidl nfsio 93864 299190 0 0 3 0x14280 nfsidl nfsio 70956 494747 0 0 3 0x14280 nfsidl nfsio 55953 230824 0 0 3 0x14280 nfsidl nfsio 32943 161902 0 0 3 0x14280 nfsidl nfsio 1782 405572 0 0 3 0x14280 nfsidl nfsio 48161 212422 0 0 3 0x14280 nfsidl nfsio 17696 365555 0 0 3 0x14200 bored sosplice 32058 253780 79434 0 3 0x1a000082 thrsleep syz-fuzzer 32058 203629 79434 0 2 0x1e000482 syz-fuzzer 32058 487496 79434 0 3 0x1e000082 thrsleep syz-fuzzer 32058 105336 79434 0 3 0x1e000082 thrsleep syz-fuzzer 32058 341143 79434 0 3 0x1e000082 wait syz-fuzzer 32058 431508 79434 0 3 0x1e000082 wait syz-fuzzer 32058 517400 79434 0 3 0x1e000082 wait syz-fuzzer 32058 153238 79434 0 3 0x1e000082 wait syz-fuzzer 32058 96784 79434 0 3 0x1e000082 kqread syz-fuzzer 32058 236173 79434 0 3 0x1e000082 thrsleep syz-fuzzer 32058 370075 79434 0 3 0x1e000082 wait syz-fuzzer 32058 96046 79434 0 3 0x1e000082 wait syz-fuzzer 32058 375989 79434 0 3 0x1e000082 wait syz-fuzzer 32058 395567 79434 0 3 0x1e000082 wait syz-fuzzer 32058 427463 79434 0 3 0x1e000082 thrsleep syz-fuzzer 79434 15759 17774 0 3 0x810008a sigsusp ksh 17774 23858 65440 0 3 0x1800009a kqread sshd 65440 91599 1 0 3 0x18000088 kqread sshd 13594 438032 5271 73 3 0x19100090 kqread syslogd 5271 91850 1 0 3 0x18100082 sbwait syslogd 91367 146041 1 0 3 0x18100080 kqread resolvd 8012 78221 17724 77 3 0x18100092 kqread dhcpleased 61705 84099 17724 77 3 0x18100092 kqread dhcpleased 17724 451330 1 0 3 0x18000080 kqread dhcpleased 96766 109731 0 0 3 0x14200 bored smr 75588 502028 0 0 2 0x14200 zerothread 83628 148319 0 0 3 0x14200 aiodoned aiodoned 21267 337091 0 0 3 0x14200 syncer update 4532 426851 0 0 3 0x14200 cleaner cleaner 30691 457956 0 0 3 0x14200 reaper reaper 85241 334471 0 0 3 0x14200 pgdaemon pagedaemon 33230 419742 0 0 3 0x14200 bored viomb 47567 210578 0 0 3 0x40014200 acpi0 acpi0 64944 273354 0 0 3 0x14200 bored softnet3 37495 374911 0 0 3 0x14200 bored softnet2 66489 354910 0 0 3 0x14200 bored softnet1 67955 51308 0 0 3 0x14200 bored softnet0 95617 332027 0 0 3 0x14200 bored systqmp 78677 407018 0 0 3 0x14200 bored systq 24205 229364 0 0 3 0x40014200 tmoslp softclock 72978 516075 0 0 3 0x40014200 idle0 1 235737 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 6440K 6925K 166960K 15794 0 pcb 18 22K 24K 166960K 2273 0 rtable 160 7K 9K 166960K 7736 0 pf 32 9K 10K 166960K 672 0 ifaddr 35 13K 15K 166960K 991 0 ifgroup 57 2K 2K 166960K 1237 0 sysctl 4 1K 3K 166960K 43 0 counters 31 17K 18K 166960K 329 0 ioctlops 0 0K 2K 166960K 792 0 iov 1 2K 22K 166960K 1135 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1519 95K 96K 166960K 7985 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 68K 84K 166960K 222 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 1308 0 dirhash 12 2K 3K 166960K 357 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 105K 166960K 15253 0 sigio 0 0K 0K 166960K 598 0 proc 58 59K 124K 166960K 6864 0 subproc 104 6K 8K 166960K 3006 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 3921 0 in_multi 57 4K 7K 166960K 3135 0 ether_multi 1 0K 0K 166960K 365 0 mrt 1 0K 0K 166960K 52 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 4786 0 pfkey data 0 0K 1K 166960K 14 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 336 204K 237K 166960K 127444 0 UVM aobj 646 16K 16K 166960K 675 0 pinsyscall 37 74K 101K 166960K 21937 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 904 0 NDP 12 0K 2K 166960K 733 0 temp 79 6812K 6942K 166960K 469330 0 kqueue 13 20K 30K 166960K 1265 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1600 0 1597 5 2 3 3 0 8 2 rtentry 112 2690 0 2625 3 0 3 3 0 8 0 unpcb 144 10969 0 10948 11 2 9 9 0 8 7 syncache 336 4 0 4 1 1 0 1 0 8 0 sackhl 24 3 17 3 1 1 0 1 0 8 0 tcpqe 32 32 2 32 1 1 0 1 0 8 0 tcpcb 808 5493 0 5488 24 15 9 15 0 8 8 arp 88 492 0 482 1 0 1 1 0 8 0 ipq 40 23 0 22 2 1 1 1 0 8 0 ipqe 40 55 0 54 2 1 1 1 0 8 0 inpcb 360 17626 0 17613 37 28 9 14 0 8 7 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 1 0 1 1 0 1 1 0 8 1 nd6 104 748 0 727 1 0 1 1 0 8 0 pkpcb 40 310 0 310 2 1 1 1 0 8 1 kcovpl 48 230 0 222 1 0 1 1 0 8 0 ppxss 1072 35 0 35 2 1 1 1 0 8 1 art_heap8 4096 9 0 7 4 1 3 3 0 8 1 art_heap4 256 10360 0 10079 129 102 27 27 0 8 2 art_table 32 10369 0 10086 5 1 4 4 0 8 0 art_node 16 2639 0 2583 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1304 0 1294 1 0 1 1 0 8 0 shmpl 112 672 0 29 19 0 19 19 0 8 0 dirhash 1024 247 0 230 3 0 3 3 0 8 0 dino2pl 256 21210 0 19612 101 0 101 101 0 8 0 ffsino 240 21210 0 19612 95 0 95 95 0 8 0 nchpl 144 40630 0 38910 66 0 66 66 0 8 0 uvmvnodes 80 11597 0 0 237 0 237 237 0 8 0 vnodes 216 11597 0 0 645 0 645 645 0 8 0 namei 1024 164129 0 164128 3 1 2 2 0 8 1 vcpupl 3904 31 0 3 4 0 4 4 0 8 0 vmpool 664 66 0 38 3 0 3 3 0 8 0 kstatmem 264 620 0 596 3 0 3 3 0 8 0 scsiplug 72 11 0 11 1 0 1 1 0 8 1 scxspl 216 194073 0 194072 10 7 3 8 1 8 2 plimitpl 152 2696 0 2681 1 0 1 1 0 8 0 sigapl 424 15146 0 15080 9 0 9 9 0 8 0 futexpl 64 190498 0 190493 1 0 1 1 0 8 0 knotepl 120 33951 0 33868 52 41 11 18 0 8 8 kqueuepl 184 4301 0 4289 7 3 4 4 0 8 3 pipepl 288 2673 0 2645 11 4 7 7 0 8 4 fdescpl 432 15095 0 15067 6 1 5 5 0 8 1 filepl 120 100636 0 100380 25 10 15 16 0 8 5 lockfpl 104 3242 0 3240 1 0 1 1 0 8 0 lockfspl 48 1104 0 1102 1 0 1 1 0 8 0 sessionpl 144 237 0 221 1 0 1 1 0 8 0 pgrppl 48 610 0 594 1 0 1 1 0 8 0 ucredpl 104 16589 0 16575 1 0 1 1 0 8 0 zombiepl 144 15080 0 15080 1 0 1 1 0 8 1 processpl 1072 15146 0 15080 6 0 6 6 0 8 0 procpl 656 31749 0 31660 10 1 9 9 0 8 0 sosppl 168 55 0 55 2 1 1 1 0 8 1 sockpl 504 30728 0 30691 263 251 12 30 0 8 7 mcl64k 65536 13 0 13 2 1 1 1 0 8 1 mcl12k 12288 17 0 17 2 1 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 232 0 231 2 1 1 1 0 8 0 mcl4k 4096 94 0 94 2 1 1 1 0 8 1 mcl2k2 2112 9 0 9 1 0 1 1 0 8 1 mcl2k 2048 120702 0 120591 55 34 21 43 0 8 5 mtagpl 96 309 0 309 5 4 1 4 0 8 1 mbufpl 256 415640 0 415433 421 391 30 218 0 8 8 bufpl 280 35769 0 24171 829 0 829 829 0 8 0 anonpl 24 1618748 0 1612470 122 24 98 98 0 188 33 amapchunkpl 152 401777 0 401066 64 15 49 49 0 158 19 amappl16 200 35872 0 35739 114 94 20 33 0 8 9 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 803 0 790 2 1 1 2 0 8 0 amappl13 176 42 0 42 2 1 1 1 0 8 1 amappl12 168 18981 0 18950 3 1 2 3 0 8 0 amappl11 160 56 0 45 1 0 1 1 0 8 0 amappl10 152 337 0 325 1 0 1 1 0 8 0 amappl9 144 198 0 198 1 1 0 1 0 8 0 amappl8 136 676 0 638 2 0 2 2 0 8 0 amappl7 128 69 0 54 1 0 1 1 0 8 0 amappl6 120 3309 0 3292 2 0 2 2 0 8 0 amappl5 112 989 0 977 1 0 1 1 0 8 0 amappl4 104 2042 0 2007 3 1 2 2 0 8 0 amappl3 96 76397 0 76311 3 0 3 3 0 8 0 amappl2 88 16056 0 15983 4 2 2 4 0 8 0 amappl1 80 68577 0 68077 22 9 13 22 0 8 0 amappl 88 124808 0 124581 6 0 6 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 72 674 0 29 12 0 12 12 0 8 0 uaddrrnd 24 15161 0 15105 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15161 0 15105 1 0 1 1 0 8 0 vmmpekpl 168 106182 0 106122 4 0 4 4 0 8 0 vmmpepl 168 934944 0 932995 134 26 108 114 0 357 10 vmsppl 344 15160 0 15105 7 1 6 6 0 8 0 rwobjpl 24 219674 0 206307 84 0 84 84 0 8 1 pdppl 4096 30328 0 30238 871 780 91 95 0 8 1 pvpl 32 4819590 0 4807106 531 274 257 391 0 265 118 pmappl 216 15160 0 15105 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1990 0 1585 16 0 16 16 0 8 3 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8292bfde) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e13f2,ffffffff8282f89d,90,ffffffff828e4a6a) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8005f35880,fffffd8060e69048,6c000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8060e69048,6c000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8060e69018,1b30221000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8060e69018,1b30221000,69352000,3,20) at pmap_enter+0x2b0 uvm_fault_lower_lookup(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0) at uvm_fault_lower_lookup+0x25a sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0,0) at uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8055ced840,1b30220000,0,1) at uvm_fault+0x22a sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002f52b0e0,1b30220000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002f52b0e0) at usertrap+0x20e sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b168a2698c0, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8292bfde) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e13f2,ffffffff8282f89d,90,ffffffff828e4a6a) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8005f35880,fffffd8060e69048,6c000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8060e69048,6c000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8060e69018,1b30221000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8060e69018,1b30221000,69352000,3,20) at pmap_enter+0x2b0 uvm_fault_lower_lookup(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0) at uvm_fault_lower_lookup+0x25a sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff80002f52af60,ffff80002f52af98,ffff80002f52aee0,0) at uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8055ced840,1b30220000,0,1) at uvm_fault+0x22a sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002f52b0e0,1b30220000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002f52b0e0) at usertrap+0x20e sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b168a2698c0, count: -13