panic: uvm_fault_unwire_locked: address not in map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 67358 86030 0 0 0 0 syz-executor.5 *309792 86030 0 0 0x4000000 1K syz-executor.5 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff826555a5) at panic+0x177 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1651 uvm_fault_unwire(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1611 sys_sysctl(ffff800029624fc8,ffff80002e50a7a8,ffff80002e50a7f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 syscall(ffff80002e50a870) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e50a870) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1af7df65780, 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+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff826555a5) at panic+0x177 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1651 uvm_fault_unwire(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1611 sys_sysctl(ffff800029624fc8,ffff80002e50a7a8,ffff80002e50a7f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 syscall(ffff80002e50a870) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e50a870) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1af7df65780, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e50a570 rbx 0xffff800020dd9b8f rdx 0 rcx 0 rax 0xffff800029624fc8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf940de5f19931a7c r11 0x7ea2e953b815444e r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff820a1308 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e50a560 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=309792 stat=onproc flags process=0 proc=4000000 pri=36, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800029624a88,0xffff800029625278 process=0xffff8000fffedd38 user=0xffff80002e505000, vmspace=0xfffffd8069fca180 estcpu=29, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52110 171708 33141 0 2 0 syz-executor.4 84816 514794 38068 0 2 0 syz-executor.1 74750 118198 30358 0 3 0x80 nanoslp syz-executor.0 74750 159790 30358 0 2 0x4000000 syz-executor.0 74750 333759 30358 0 3 0x4000080 fsleep syz-executor.0 86030 67358 36994 0 7 0 syz-executor.5 *86030 309792 36994 0 7 0x4000000 syz-executor.5 86030 113160 36994 0 2 0x4000000 syz-executor.5 92383 378689 36639 0 2 0x4081000 syz-executor.2 92383 428271 36639 0 2 0x4081000 syz-executor.2 92383 159364 36639 0 3 0x4003000 suspend syz-executor.2 48509 290274 0 0 3 0x14280 nfsidl nfsio 29187 182657 0 0 3 0x14280 nfsidl nfsio 69899 47008 0 0 3 0x14280 nfsidl nfsio 5680 198942 0 0 3 0x14280 nfsidl nfsio 83113 166302 0 0 3 0x14280 nfsidl nfsio 57249 173977 0 0 3 0x14280 nfsidl nfsio 52591 59199 0 0 3 0x14280 nfsidl nfsio 70305 95772 0 0 3 0x14280 nfsidl nfsio 5616 508302 0 0 3 0x14280 nfsidl nfsio 53459 408722 0 0 3 0x14280 nfsidl nfsio 42662 409230 0 0 3 0x14280 nfsidl nfsio 98777 512675 0 0 3 0x14280 nfsidl nfsio 26911 175407 0 0 3 0x14280 nfsidl nfsio 35495 454670 0 0 3 0x14280 nfsidl nfsio 23159 166219 0 0 3 0x14280 nfsidl nfsio 56640 23366 0 0 3 0x14280 nfsidl nfsio 6800 139448 0 0 3 0x14280 nfsidl nfsio 6503 286586 0 0 3 0x14280 nfsidl nfsio 87436 139791 0 0 3 0x14280 nfsidl nfsio 84239 354723 0 0 3 0x14280 nfsidl nfsio 2439 88563 29164 0 3 0x82 nanoslp syz-executor.7 1802 451716 29164 0 2 0x2 syz-executor.6 36994 466131 29164 0 3 0x82 nanoslp syz-executor.5 33141 466452 29164 0 3 0x82 nanoslp syz-executor.4 80615 15619 29164 0 3 0x2 biowait syz-executor.3 36639 456957 29164 0 3 0x82 nanoslp syz-executor.2 38068 387403 29164 0 3 0x82 nanoslp syz-executor.1 30358 445351 29164 0 3 0x82 nanoslp syz-executor.0 29164 117857 48412 0 3 0x82 thrsleep syz-fuzzer 29164 244487 48412 0 3 0x4000082 nanoslp syz-fuzzer 29164 111935 48412 0 3 0x4000082 thrsleep syz-fuzzer 29164 203323 48412 0 3 0x4000082 wait syz-fuzzer 29164 398665 48412 0 3 0x4000082 wait syz-fuzzer 29164 94984 48412 0 3 0x4000082 thrsleep syz-fuzzer 29164 225958 48412 0 3 0x4000082 wait syz-fuzzer 29164 347395 48412 0 3 0x4000082 wait syz-fuzzer 29164 11865 48412 0 3 0x4000082 thrsleep syz-fuzzer 29164 187896 48412 0 3 0x4000082 wait syz-fuzzer 29164 168173 48412 0 3 0x4000082 wait syz-fuzzer 29164 156362 48412 0 3 0x4000082 wait syz-fuzzer 29164 449140 48412 0 3 0x4000082 thrsleep syz-fuzzer 29164 453333 48412 0 3 0x4000082 wait syz-fuzzer 29164 500802 48412 0 3 0x4000082 thrsleep syz-fuzzer 29164 92774 48412 0 3 0x4000082 kqread syz-fuzzer 48412 388268 37635 0 3 0x10008a sigsusp ksh 37635 12784 5001 0 3 0x9a kqread sshd 6080 97436 1 0 3 0x100083 ttyin getty 5001 337522 1 0 3 0x88 kqread sshd 16579 469727 16339 74 3 0x1100092 bpf pflogd 16339 177747 1 0 3 0x80 netio pflogd 41232 419652 98768 73 3 0x1100090 kqread syslogd 98768 231803 1 0 3 0x100082 netio syslogd 87179 264773 1 0 3 0x100080 kqread resolvd 13629 358230 10220 77 3 0x100092 kqread dhcpleased 66562 34141 10220 77 3 0x100092 kqread dhcpleased 10220 14107 1 0 3 0x80 kqread dhcpleased 54740 16767 0 0 3 0x14200 bored smr 70102 246001 0 0 2 0x14200 zerothread 22662 455702 0 0 3 0x14200 aiodoned aiodoned 12490 50746 0 0 3 0x14200 syncer update 40914 495515 0 0 3 0x14200 cleaner cleaner 94781 343165 0 0 3 0x14200 reaper reaper 4866 296243 0 0 3 0x14200 pgdaemon pagedaemon 91194 153537 0 0 3 0x14200 bored viomb 97337 508781 0 0 3 0x40014200 acpi0 acpi0 37000 219742 0 0 3 0x40014200 idle1 29333 233825 0 0 3 0x14200 bored softnet 92777 174683 0 0 3 0x14200 bored softnet 45337 202198 0 0 3 0x14200 bored softnet 31887 492935 0 0 3 0x14200 bored softnet 25209 440802 0 0 3 0x14200 bored systqmp 67754 47101 0 0 3 0x14200 bored systq 78025 138979 0 0 3 0x40014200 bored softclock 2625 46640 0 0 3 0x40014200 idle0 1 144010 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 86030 (syz-executor.5) thread 0xffff800029624fc8 (309792) shared rwlock vmmaplk r = 0 (0xfffffd8069fca228) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1610 #3 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 #4 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829ee7c0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:415 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1610 #6 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 #7 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #7 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #8 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff829c76d0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234 #3 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #4 Xsyscall+0x128 Process 80615 (syz-executor.3) thread 0xffff8000212fad30 (15619) exclusive rrwlock inode r = 0 (0xfffffd8076d2d2b8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e3711b0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 6491K 6523K 78643K 14439 0 pcb 13 12K 14K 78643K 3137 0 rtable 234 6K 6K 78643K 351 0 ifaddr 87 17K 17K 78643K 89 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 1776 0 iov 0 0K 4K 78643K 284 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1338 84K 84K 78643K 1620 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 160 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2314 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 85K 78643K 28839 0 sigio 0 0K 0K 78643K 1753 0 proc 67 91K 128K 78643K 519 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 6K 6K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 378 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 254 80K 82K 78643K 174200 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 1K 78643K 28 0 temp 129 4702K 4830K 78643K 62773 0 kqueue 12 18K 18K 78643K 22 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 35 0 32 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 25499 0 25484 79 77 2 11 0 8 1 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 46 0 46 1 1 0 1 0 8 0 tcpcb 776 312 0 308 4 3 1 4 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 3906 0 3899 43 42 1 7 0 8 0 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 20 1 0 1 1 0 8 0 semapl 112 2312 0 2302 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 30381 0 28943 91 0 91 91 0 8 0 ffsino 272 30381 0 28943 97 0 97 97 0 8 0 nchpl 144 61371 0 59692 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 153723 0 153722 2 1 1 2 0 8 0 percpumem 16 42 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 179327 0 179326 9 8 1 8 0 8 0 plimitpl 152 658 0 642 1 0 1 1 0 8 0 sigapl 424 29172 0 29106 9 1 8 8 0 8 0 futexpl 64 181703 0 181702 1 0 1 1 0 8 0 knotepl 120 106 0 0 4 0 4 4 0 8 0 kqueuepl 216 18 0 10 1 0 1 1 0 8 0 pipepl 320 132 0 104 3 0 3 3 0 8 0 fdescpl 496 29135 0 29107 5 0 5 5 0 8 0 filepl 152 91941 0 91701 98 87 11 20 0 8 1 lockfpl 104 4607 0 4605 2 1 1 2 0 8 0 lockfspl 48 934 0 932 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 1801 0 1784 1 0 1 1 0 8 0 ucredpl 104 249 0 237 1 0 1 1 0 8 0 zombiepl 144 29108 0 29106 1 0 1 1 0 8 0 processpl 1064 29172 0 29106 5 0 5 5 0 8 0 procpl 672 65141 0 65053 50 42 8 9 0 8 0 sockpl 488 29440 0 29415 332 324 8 36 0 8 4 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 38 0 0 2 0 2 2 0 8 0 mcl8k 8192 65 0 0 5 2 3 3 0 8 0 mcl4k 4096 49 0 0 3 0 3 3 0 8 0 mcl2k2 2112 28 0 0 2 0 2 2 0 8 0 mcl2k 2048 315 0 0 33 5 28 33 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1374 0 0 23 0 23 23 0 8 0 bufpl 288 32873 0 26542 453 0 453 453 0 8 0 anonpl 24 4692084 0 4683633 74 18 56 57 0 186 0 amapchunkpl 152 480900 0 480343 85 62 23 31 0 158 0 amappl16 200 28173 0 28006 15 5 10 10 0 8 1 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 139 0 126 2 1 1 2 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 443 0 440 1 0 1 1 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 39 0 27 1 0 1 1 0 8 0 amappl9 144 968 0 966 1 0 1 1 0 8 0 amappl8 136 338 0 268 3 0 3 3 0 8 0 amappl7 128 67 0 53 1 0 1 1 0 8 0 amappl6 120 326 0 309 2 1 1 2 0 8 0 amappl5 112 235 0 222 1 0 1 1 0 8 0 amappl4 104 752 0 725 2 1 1 2 0 8 0 amappl3 96 80113 0 80060 2 0 2 2 0 8 0 amappl2 88 30320 0 30247 3 1 2 3 0 8 0 amappl1 80 627150 0 626416 26 9 17 22 0 8 0 amappl 88 173526 0 173364 7 2 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 29136 0 29108 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 29136 0 29108 1 0 1 1 0 8 0 vmmpekpl 168 133154 0 133103 3 0 3 3 0 8 0 vmmpepl 168 2466223 0 2464004 295 187 108 111 0 357 1 vmsppl 368 29135 0 29108 4 0 4 4 0 8 0 rwobjpl 56 605396 0 598015 120 15 105 106 0 8 0 pdppl 4096 58279 0 58216 1427 1358 69 79 0 8 6 pvpl 32 9726581 0 9712527 370 241 129 274 0 265 0 pmappl 248 29135 0 29108 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2225 0 1412 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82984ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff829ee5b8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829ee5b8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000295f6d60,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x40 sys/dev/kcov.c:154 syscall(ffff8000295f6f40) at syscall+0x424 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000295f6f40) at syscall+0x424 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbc60, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82984ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff829ee5b8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829ee5b8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000295f6d60,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x40 sys/dev/kcov.c:154 syscall(ffff8000295f6f40) at syscall+0x424 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000295f6f40) at syscall+0x424 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbc60, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff826555a5) at panic+0x177 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1651 uvm_fault_unwire(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1611 sys_sysctl(ffff800029624fc8,ffff80002e50a7a8,ffff80002e50a7f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 syscall(ffff80002e50a870) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e50a870) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1af7df65780, count: 8 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff826555a5) at panic+0x177 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire_locked+0x321 sys/uvm/uvm_fault.c:1651 uvm_fault_unwire(fffffd8069fca180,20000000,20001000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1611 sys_sysctl(ffff800029624fc8,ffff80002e50a7a8,ffff80002e50a7f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255 syscall(ffff80002e50a870) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e50a870) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1af7df65780, count: -7