panic: uvm_fault_unwire_locked: address not in map Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *451884 35971 32767 0x10 0x4000000 1 syz-executor.2 161938 93783 32767 0x10 0 0 syz-executor.7 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8286162d) at panic+0x17b sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire+0x43 sys/uvm/uvm_fault.c:1623 sys_sysctl(ffff80002125bd58,ffff800027b514c0,ffff800027b51510) at sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 syscall(ffff800027b51590) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b51590) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x323d295c2e0, count: 8 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: uvm_fault_unwire_locked: address not in map ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8286162d) at panic+0x17b sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire+0x43 sys/uvm/uvm_fault.c:1623 sys_sysctl(ffff80002125bd58,ffff800027b514c0,ffff800027b51510) at sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 syscall(ffff800027b51590) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b51590) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x323d295c2e0, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800027b51290 rbx 0xffff800020d49ba7 rdx 0 rcx 0xffff80002125bd58 rax 0xffff800020d48ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2f2c13f1eddc33dc r11 0xd5e27d44da704378 r12 0xffff800020d499a8 r13 0 r14 0 r15 0x1 rip 0xffffffff81be1a9c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800027b51280 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) tid=451884 pid=35971 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=36, usrpri=81, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002125b2b8,0xffff800021272ab0 process=0xffff8000212a50d8 user=0xffff800027b4c000, vmspace=0xfffffd807e449cd0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78140 483227 65102 32767 2 0x10 syz-executor.3 34916 421488 93783 32767 2 0x10 syz-executor.7 34916 375009 93783 32767 2 0x4000010 syz-executor.7 78165 83199 16837 32767 2 0x10 syz-executor.0 78165 2084 16837 32767 3 0x4000090 fsleep syz-executor.0 78165 287036 16837 32767 2 0x4000010 syz-executor.0 35971 180680 16114 32767 2 0x10 syz-executor.2 35971 217810 16114 32767 3 0x4000090 fsleep syz-executor.2 *35971 451884 16114 32767 7 0x4000010 syz-executor.2 21011 165211 26354 32767 2 0x10 syz-executor.1 21011 420614 26354 32767 3 0x4000090 fsleep syz-executor.1 70227 132159 56547 0 3 0x82 wait syz-executor.4 93783 161938 26802 32767 7 0x10 syz-executor.7 26802 87131 56547 0 3 0x82 wait syz-executor.7 16837 194254 4351 32767 3 0x90 nanoslp syz-executor.0 4351 191128 56547 0 3 0x82 wait syz-executor.0 26354 272373 47098 32767 3 0x90 nanoslp syz-executor.1 47098 156473 56547 0 3 0x82 wait syz-executor.1 12164 403541 28851 32767 2 0x10 syz-executor.5 28851 301270 56547 0 3 0x82 wait syz-executor.5 65102 191092 76457 32767 3 0x90 nanoslp syz-executor.3 76457 220516 56547 0 3 0x82 wait syz-executor.3 16114 213203 43118 32767 3 0x90 nanoslp syz-executor.2 43118 76006 56547 0 3 0x82 wait syz-executor.2 92207 261522 0 0 3 0x14200 bored sosplice 50754 453711 64033 32767 2 0x10 syz-executor.6 64033 297599 56547 0 3 0x82 wait syz-executor.6 56547 428950 71997 0 3 0x2000082 kqread syz-fuzzer 56547 331852 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 412296 71997 0 3 0x6000082 wait syz-fuzzer 56547 261875 71997 0 3 0x6000082 wait syz-fuzzer 56547 15218 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 9770 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 80715 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 56836 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 427684 71997 0 3 0x6000082 wait syz-fuzzer 56547 50609 71997 0 3 0x6000082 wait syz-fuzzer 56547 4789 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 335813 71997 0 3 0x6000082 thrsleep syz-fuzzer 56547 153522 71997 0 3 0x6000082 wait syz-fuzzer 56547 45620 71997 0 3 0x6000082 wait syz-fuzzer 56547 95737 71997 0 3 0x6000082 wait syz-fuzzer 56547 340945 71997 0 3 0x6000082 wait syz-fuzzer 71997 431506 78036 0 3 0x10008a sigsusp ksh 78036 384309 27769 0 3 0x9a kqread sshd 79075 341384 1 0 3 0x100083 ttyin getty 27769 173838 1 0 3 0x88 kqread sshd 12108 110928 13497 73 3 0x1100090 kqread syslogd 13497 254256 1 0 3 0x100082 netio syslogd 64339 477828 1 0 3 0x100080 kqread resolvd 92700 497436 29748 77 3 0x100092 kqread dhcpleased 92976 444115 29748 77 3 0x100092 kqread dhcpleased 29748 334962 1 0 3 0x80 kqread dhcpleased 15341 112867 0 0 3 0x14200 bored smr 60694 379317 0 0 2 0x14200 zerothread 81553 219460 0 0 3 0x14200 aiodoned aiodoned 74848 511748 0 0 3 0x14200 syncer update 13163 397689 0 0 3 0x14200 cleaner cleaner 28899 504785 0 0 3 0x14200 reaper reaper 87576 294355 0 0 3 0x14200 pgdaemon pagedaemon 48189 177512 0 0 3 0x14200 bored viomb 33470 48784 0 0 3 0x40014200 acpi0 acpi0 71658 223695 0 0 3 0x40014200 idle1 35915 69278 0 0 3 0x14200 bored softnet3 38347 133813 0 0 3 0x14200 bored softnet2 27398 392159 0 0 3 0x14200 bored softnet1 32982 310476 0 0 3 0x14200 bored softnet0 82597 231595 0 0 3 0x14200 bored systqmp 57633 40224 0 0 3 0x14200 bored systq 42901 466285 0 0 3 0x14200 tmoslp softclockmp 84940 266619 0 0 3 0x40014200 tmoslp softclock 28325 27514 0 0 3 0x40014200 idle0 1 336700 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 35971 (syz-executor.2) thread 0xffff80002125b2b8 (217810) exclusive rwlock amaplk r = 0 (0xfffffd807a69d588) #0 witness_lock+0x447 #1 amap_unref+0x2f sys/uvm/uvm_amap.c:1363 #2 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 #3 sys_munmap+0x22e sys/uvm/uvm_mmap.c:539 #4 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #4 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #5 Xsyscall+0x128 Process 35971 (syz-executor.2) thread 0xffff80002125bd58 (451884) shared rwlock vmmaplk r = 0 (0xfffffd807e449dc8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 uvm_fault_unwire+0x35 sys/uvm/uvm_fault.c:1622 #3 sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 #4 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #4 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d6c010) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46d sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 rw_enter+0x341 sys/kern/kern_rwlock.c:285 #5 uvm_fault_unwire+0x35 sys/uvm/uvm_fault.c:1622 #6 sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 #7 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #7 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #8 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff82c42200) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 sys_sysctl+0x1c3 sys/kern/kern_sysctl.c:238 #3 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #3 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10213 6412K 6420K 78643K 11403 0 pcb 13 16K 20K 78643K 19 0 rtable 252 7K 7K 78643K 21547 0 pf 29 8K 8K 78643K 103 0 ifaddr 44 15K 15K 78643K 198 0 ifgroup 50 2K 2K 78643K 198 0 sysctl 4 1K 1K 78643K 7 0 counters 60 35K 35K 78643K 134 0 ioctlops 0 0K 2K 78643K 455 0 iov 0 0K 32K 78643K 3268 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 5984 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 378 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 45 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 25360 0 sigio 0 0K 0K 78643K 2887 0 proc 56 78K 115K 78643K 2890 0 subproc 104 6K 6K 78643K 585 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1450 0 in_multi 99 7K 7K 78643K 768 0 ether_multi 1 0K 0K 78643K 45 0 mrt 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 217 970K 970K 78643K 217 0 exec 0 0K 1K 78643K 4237 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 484 94K 110K 78643K 253115 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 667 0 NDP 11 0K 2K 78643K 138 0 temp 74 5920K 6048K 78643K 65228 0 kqueue 12 18K 33K 78643K 2345 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 22216 0 22213 120 115 5 7 0 8 4 rtentry 112 558 0 439 4 0 4 4 0 8 0 unpcb 144 27040 0 27027 213 212 1 10 0 8 0 syncache 312 348 0 348 45 44 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 648 0 648 49 49 0 2 0 8 0 tcpcb 808 14188 0 14163 199 190 9 18 0 8 0 arp 120 98 0 80 1 0 1 1 0 8 0 ipq 40 44 0 43 13 12 1 1 0 8 0 ipqe 40 322 0 321 13 12 1 1 0 8 0 inpcb 368 24140 0 24112 247 238 9 23 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 136 169 0 136 3 1 2 2 0 8 0 kcovpl 48 45 0 37 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2201 0 1726 33 3 30 31 0 8 0 art_table 32 2202 0 1726 4 0 4 4 0 8 0 art_node 16 557 0 448 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 43 0 35 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 33899 0 32414 93 0 93 93 0 8 0 ffsino 272 33899 0 32414 100 0 100 100 0 8 0 nchpl 144 66540 0 64894 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 221306 0 221306 11 10 1 2 0 8 1 percpumem 16 80 0 37 1 0 1 1 0 8 0 kstatmem 264 96 0 74 2 0 2 2 0 8 0 scxspl 216 198947 0 198947 83 82 1 8 1 8 1 plimitpl 152 3681 0 3658 40 39 1 2 0 8 0 sigapl 424 25585 0 25532 7 0 7 7 0 8 0 futexpl 64 224156 0 224153 7 6 1 1 0 8 0 knotepl 120 1523 0 0 18 2 16 17 0 8 0 kqueuepl 216 5392 0 5384 101 100 1 8 0 8 0 pipepl 320 7163 0 7135 172 164 8 13 0 8 5 fdescpl 496 25566 0 25532 7 2 5 6 0 8 0 filepl 152 186708 0 186473 324 306 18 25 0 8 8 lockfpl 104 4548 0 4546 4 3 1 2 0 8 0 lockfspl 48 1178 0 1176 1 0 1 1 0 8 0 sessionpl 144 60 0 44 1 0 1 1 0 8 0 pgrppl 48 287 0 271 1 0 1 1 0 8 0 ucredpl 104 25068 0 25050 1 0 1 1 0 8 0 zombiepl 144 25533 0 25532 3 2 1 1 0 8 0 processpl 1072 25585 0 25532 5 1 4 5 0 8 0 procpl 680 72007 0 71933 42 34 8 8 0 8 1 srpgc 96 25 0 25 17 17 0 1 0 8 0 sosppl 168 375 0 374 23 22 1 1 0 8 0 sockpl 488 74790 0 74746 1123 1104 19 42 0 8 8 mcl64k 65536 49 0 0 5 2 3 3 0 8 0 mcl16k 16384 49 0 0 4 1 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 49 0 0 5 2 3 3 0 8 0 mcl4k 4096 84 0 0 4 1 3 3 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 626 0 0 38 19 19 33 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 20055 0 0 1225 0 1225 1225 0 8 0 bufpl 288 50251 0 43931 452 0 452 452 0 8 0 anonpl 24 2519918 0 2508288 282 185 97 103 0 186 0 amapchunkpl 152 808532 0 807695 180 142 38 51 0 158 1 amappl16 200 59566 0 59242 342 323 19 35 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 278 0 264 2 1 1 2 0 8 0 amappl13 176 13 0 13 3 3 0 1 0 8 0 amappl12 168 26774 0 26738 2 0 2 2 0 8 0 amappl11 160 58 0 47 1 0 1 1 0 8 0 amappl10 152 81 0 71 1 0 1 1 0 8 0 amappl9 144 370 0 370 43 42 1 1 0 8 1 amappl8 136 1425 0 1187 9 0 9 9 0 8 0 amappl7 128 407 0 379 2 0 2 2 0 8 0 amappl6 120 1146 0 1124 1 0 1 1 0 8 0 amappl5 112 604 0 596 1 0 1 1 0 8 0 amappl4 104 1133 0 1102 2 1 1 2 0 8 0 amappl3 96 155705 0 155612 15 12 3 4 0 8 0 amappl2 88 27484 0 27392 7 4 3 3 0 8 0 amappl1 80 98493 0 97965 22 9 13 22 0 8 0 amappl 88 251248 0 251003 10 3 7 7 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 25566 0 25532 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 25566 0 25532 1 0 1 1 0 8 0 vmmpekpl 168 204484 0 204421 4 0 4 4 0 8 0 vmmpepl 168 1495832 0 1493285 301 177 124 131 0 357 0 vmsppl 464 25565 0 25532 7 2 5 6 0 8 0 rwobjpl 56 375298 0 367718 118 7 111 112 0 8 0 pdppl 4096 51140 0 51064 828 746 82 94 0 8 6 pvpl 32 6967440 0 6949725 628 452 176 359 0 265 0 pmappl 248 25565 0 25532 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3338 0 1292 60 1 59 59 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c2cff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a sys/dev/kcov.c:158 __mp_lock(ffffffff82d6be08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6be08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800022ceb180) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022ceb180) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d064621a740, count: 8 ddb{0}> trace x86_ipi_db(ffffffff82c2cff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1a sys/dev/kcov.c:158 __mp_lock(ffffffff82d6be08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6be08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800022ceb180) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022ceb180) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d064621a740, count: -7 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8286162d) at panic+0x17b sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire+0x43 sys/uvm/uvm_fault.c:1623 sys_sysctl(ffff80002125bd58,ffff800027b514c0,ffff800027b51510) at sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 syscall(ffff800027b51590) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b51590) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x323d295c2e0, count: 8 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8286162d) at panic+0x17b sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd807e449cd0,20002000,20003000) at uvm_fault_unwire+0x43 sys/uvm/uvm_fault.c:1623 sys_sysctl(ffff80002125bd58,ffff800027b514c0,ffff800027b51510) at sys_sysctl+0x239 sys/kern/kern_sysctl.c:259 syscall(ffff800027b51590) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b51590) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x323d295c2e0, count: -7