login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 246003 50984 0 0 0x4000000 0 syz-executor2761855390 *403270 50984 0 0 0x4000000 1K syz-executor2761855390 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258ed9d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8260416c,ffffffff8255d97a,66b,ffffffff8256c874) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff80002119d260,ffff800021245618,ffff800021245670) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000212456e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212456e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36121081db0, count: 7 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: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258ed9d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8260416c,ffffffff8255d97a,66b,ffffffff8256c874) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff80002119d260,ffff800021245618,ffff800021245670) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000212456e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212456e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36121081db0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212453a0 rbx 0xffff800020ce9bff rdx 0x3fd rcx 0 rax 0x9f r8 0x101010101010101 r9 0x8080808080808080 r10 0xde3d8e0dafd86e73 r11 0xfdbe11d988032413 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81f186c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021245390 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor2761855390) pid=403270 stat=onproc flags process=0 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021142a88,0xffff80002119ca90 process=0xffff8000ffff8430 user=0xffff800021240000, vmspace=0xfffffd806ce0db90 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14511 81761 68554 0 2 0 syz-executor2761855390 95571 270963 52824 0 2 0 syz-executor2761855390 50984 508519 13703 0 2 0 syz-executor2761855390 50984 246003 13703 0 7 0x4000000 syz-executor2761855390 *50984 403270 13703 0 7 0x4000000 syz-executor2761855390 7321 511557 76422 0 2 0 syz-executor2761855390 7321 315624 76422 0 3 0x4000080 fsleep syz-executor2761855390 7321 135117 76422 0 3 0x4000080 fsleep syz-executor2761855390 42824 228116 70205 0 2 0 syz-executor2761855390 42824 373253 70205 0 2 0x4000000 syz-executor2761855390 42824 35628 70205 0 2 0x4000000 syz-executor2761855390 70205 351593 68963 0 3 0x80 nanoslp syz-executor2761855390 13703 374445 68963 0 3 0x80 nanoslp syz-executor2761855390 68554 455811 68963 0 3 0x80 nanoslp syz-executor2761855390 76422 230031 68963 0 3 0x80 nanoslp syz-executor2761855390 52824 288564 68963 0 3 0x80 nanoslp syz-executor2761855390 3933 391692 68963 0 3 0x80 nanoslp syz-executor2761855390 62972 405974 68963 0 3 0 biowait syz-executor2761855390 33012 446110 68963 0 3 0x80 nanoslp syz-executor2761855390 68963 374781 78520 0 3 0x82 nanoslp syz-executor2761855390 78520 471934 84764 0 3 0x10008a sigsusp ksh 84764 331231 83994 0 3 0x9a kqread sshd 3039 301515 1 0 3 0x100083 ttyin getty 83994 496002 1 0 3 0x88 kqread sshd 20448 220590 37350 73 3 0x1100090 kqread syslogd 37350 146404 1 0 3 0x100082 netio syslogd 1632 243858 1 0 3 0x100080 kqread resolvd 80977 154047 25423 77 3 0x100092 kqread dhcpleased 60417 443742 25423 77 3 0x100092 kqread dhcpleased 25423 81880 1 0 3 0x80 kqread dhcpleased 7420 101092 0 0 3 0x14200 bored smr 54876 450097 0 0 2 0x14200 zerothread 1573 175049 0 0 3 0x14200 aiodoned aiodoned 97080 240872 0 0 3 0x14200 syncer update 30537 49411 0 0 3 0x14200 cleaner cleaner 14138 273664 0 0 3 0x14200 reaper reaper 40119 193304 0 0 3 0x14200 pgdaemon pagedaemon 78965 259517 0 0 3 0x14200 bored viomb 90076 278011 0 0 3 0x40014200 acpi0 acpi0 20886 310096 0 0 3 0x40014200 idle1 75634 105706 0 0 3 0x14200 bored softnet 81831 300244 0 0 3 0x14200 bored systqmp 18291 92867 0 0 3 0x14200 bored systq 81464 213391 0 0 3 0x40014200 bored softclock 26732 507230 0 0 3 0x40014200 idle0 1 172351 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 50984 (syz-executor2761855390) thread 0xffff800021142a88 (246003) exclusive rwlock futex r = 0 (0xffffffff828fc810) #0 witness_lock+0x44d #1 sys_futex+0x5c sys/kern/sys_futex.c:108 #2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 Process 50984 (syz-executor2761855390) thread 0xffff80002119d260 (403270) exclusive rwlock amaplk r = 0 (0xfffffd807ac87750) #0 witness_lock+0x44d #1 uvm_map_lock_entry+0x36 sys/uvm/uvm_map.c:508 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1655 #3 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 #4 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806ce0dba8) #0 witness_lock+0x44d #1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1600 #2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829fea58) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x198 sys/kern/kern_synch.c:437 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #6 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #7 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #8 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1580 #9 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:240 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff82981250) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:233 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 62972 (syz-executor2761855390) thread 0xffff8000ffff6a90 (405974) exclusive rrwlock inode r = 0 (0xfffffd806cf132c8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e424f80) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10143 6388K 6419K 78643K 11233 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 108 0 ifaddr 24 7K 7K 78643K 24 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 2K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1166 73K 73K 78643K 1179 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 55 74K 75K 78643K 226 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 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 2K 78643K 391 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 7 26K 26K 78643K 7 0 UVM amap 149 6K 7K 78643K 198243 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 19 4694K 4758K 78643K 35623 0 kqueue 11 16K 18K 78643K 24 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 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 136 33 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 312 25 0 19 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17699 0 16306 88 0 88 88 0 8 0 ffsino 272 17699 0 16306 93 0 93 93 0 8 0 nchpl 144 34149 0 32592 58 0 58 58 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 69244 0 69244 3 2 1 2 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 101707 0 101706 20 19 1 8 0 8 0 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 424 16576 0 16534 5 0 5 5 0 8 0 futexpl 64 39174 0 39171 1 0 1 1 0 8 0 knotepl 120 42 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 336 79 0 76 2 1 1 1 0 8 0 fdescpl 496 16562 0 16536 5 1 4 4 0 8 0 filepl 152 17279 0 17226 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 64 0 54 1 0 1 1 0 8 0 zombiepl 144 16536 0 16534 2 1 1 1 0 8 0 processpl 1064 16576 0 16534 3 0 3 3 0 8 0 procpl 672 48833 0 48785 5 0 5 5 0 8 1 sockpl 480 75 0 53 4 1 3 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 70 0 0 8 0 8 8 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 114 0 0 7 0 7 7 0 8 0 bufpl 288 18234 0 12014 445 0 445 445 0 8 0 anonpl 24 3103013 0 3099509 33 7 26 28 0 186 2 amapchunkpl 152 432863 0 432585 23 8 15 16 0 158 1 amappl16 200 7062 0 7052 3 2 1 2 0 8 0 amappl15 192 59 0 56 1 0 1 1 0 8 0 amappl14 184 2 0 1 1 0 1 1 0 8 0 amappl13 176 32 0 31 2 1 1 1 0 8 0 amappl12 168 8 0 8 2 2 0 1 0 8 0 amappl11 160 38 0 28 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 456 0 454 1 0 1 1 0 8 0 amappl8 136 360 0 348 1 0 1 1 0 8 0 amappl7 128 60 0 57 1 0 1 1 0 8 0 amappl6 120 107 0 94 1 0 1 1 0 8 0 amappl5 112 173 0 165 1 0 1 1 0 8 0 amappl4 104 16845 0 16821 1 0 1 1 0 8 0 amappl3 96 29028 0 29015 1 0 1 1 0 8 0 amappl2 88 336 0 300 1 0 1 1 0 8 0 amappl1 80 244527 0 244090 13 2 11 11 0 8 0 amappl 88 194352 0 194227 6 2 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 16562 0 16536 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 16562 0 16536 1 0 1 1 0 8 0 vmmpekpl 168 118427 0 118408 2 0 2 2 0 8 0 vmmpepl 168 1111414 0 1110163 81 17 64 68 0 357 6 vmsppl 368 16561 0 16536 3 0 3 3 0 8 0 rwobjpl 56 297005 0 290468 95 2 93 94 0 8 0 pdppl 4096 33131 0 33072 87 22 65 65 0 8 6 pvpl 32 4868857 0 4863012 76 21 55 59 0 265 3 pmappl 248 16561 0 16536 3 1 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 754 0 27 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff829afff0) 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(ffffffff829fe850) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829fe850) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021209440,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff829fe850) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829fe850) at __mp_lock+0x122 sys/kern/kern_lock.c:147 sleep_setup(ffff8000212095d0,ffff800021142a88,120,ffffffff82583965,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800021142a88,ffffffff828fc800,120,ffffffff82583965,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(361cb3cd2a0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021142a88,ffff800021209760,ffff8000212097c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff800021209830) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021209830) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3610e0cfcb0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff829afff0) 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(ffffffff829fe850) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829fe850) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021209440,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff829fe850) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829fe850) at __mp_lock+0x122 sys/kern/kern_lock.c:147 sleep_setup(ffff8000212095d0,ffff800021142a88,120,ffffffff82583965,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800021142a88,ffffffff828fc800,120,ffffffff82583965,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(361cb3cd2a0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021142a88,ffff800021209760,ffff8000212097c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff800021209830) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021209830) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3610e0cfcb0, count: -13 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:440 panic(ffffffff8258ed9d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8260416c,ffffffff8255d97a,66b,ffffffff8256c874) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff80002119d260,ffff800021245618,ffff800021245670) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000212456e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212456e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36121081db0, count: 7 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258ed9d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8260416c,ffffffff8255d97a,66b,ffffffff8256c874) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806ce0db90,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff80002119d260,ffff800021245618,ffff800021245670) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000212456e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212456e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36121081db0, count: -8 ddb{1}>