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 356742 835 32767 0x10 0x4000000 0 syz-executor.3 *173208 87045 32767 0x10 0x4000000 1K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82587927) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb397,ffffffff82557384,66b,ffffffff82566b58) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffecd30,ffff80002e3aa658,ffff80002e3aa6b0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3aa720) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3aa720) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fdc36eb480, 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(ffffffff82587927) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb397,ffffffff82557384,66b,ffffffff82566b58) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffecd30,ffff80002e3aa658,ffff80002e3aa6b0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3aa720) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3aa720) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fdc36eb480, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e3aa3e0 rbx 0xffff800020ce9bff rdx 0 rcx 0 rax 0xffff8000fffecd30 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe1b3a3df0187a743 r11 0x6b5957807181e127 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81b0e478 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e3aa3d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=173208 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffec010,0xffff8000fffefcf8 process=0xffff8000ffff2dd0 user=0xffff80002e3a5000, vmspace=0xfffffd8067ecd2f8 estcpu=30, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 835 365362 92763 32767 2 0x10 syz-executor.3 835 240256 92763 32767 2 0x4000010 syz-executor.3 835 356742 92763 32767 7 0x4000010 syz-executor.3 835 70781 92763 32767 3 0x4000090 fsleep syz-executor.3 50722 390034 26577 32767 2 0x10 syz-executor.7 50722 180623 26577 32767 2 0x4000010 syz-executor.7 65926 225778 14452 32767 2 0x10 syz-executor.6 65926 457574 14452 32767 3 0x4000090 fsleep syz-executor.6 87045 204464 17007 32767 2 0x10 syz-executor.1 87045 467503 17007 32767 3 0x4000090 fsleep syz-executor.1 *87045 173208 17007 32767 7 0x4000010 syz-executor.1 48 390024 66308 32767 2 0x10 syz-executor.2 48 269460 66308 32767 3 0x4000090 fsleep syz-executor.2 56266 134290 28825 32767 2 0x10 syz-executor.0 56266 311039 28825 32767 2 0x4000010 syz-executor.0 4121 376332 86175 32767 2 0x10 syz-executor.5 4121 291080 86175 32767 3 0x4000090 fsleep syz-executor.5 4121 70116 86175 32767 3 0x4000090 fsleep syz-executor.5 66308 180480 63646 32767 3 0x90 nanoslp syz-executor.2 63646 91993 75692 0 3 0x82 wait syz-executor.2 92763 329135 99482 32767 3 0x90 nanoslp syz-executor.3 99482 84858 75692 0 3 0x82 wait syz-executor.3 28825 99808 15658 32767 3 0x90 nanoslp syz-executor.0 15658 294230 75692 0 3 0x82 wait syz-executor.0 86175 396197 43641 32767 3 0x90 nanoslp syz-executor.5 43641 215596 75692 0 3 0x82 wait syz-executor.5 74045 167205 0 0 3 0x14200 bored sosplice 26577 135127 41586 32767 3 0x90 nanoslp syz-executor.7 36623 5135 46731 32767 3 0x90 nanoslp syz-executor.4 41586 49620 75692 0 3 0x82 wait syz-executor.7 14452 362383 470 32767 3 0x90 nanoslp syz-executor.6 46731 73200 75692 0 3 0x82 wait syz-executor.4 470 261266 75692 0 3 0x82 wait syz-executor.6 17007 113018 95091 32767 3 0x90 nanoslp syz-executor.1 95091 123839 75692 0 3 0x82 wait syz-executor.1 75692 57471 39327 0 3 0x82 kqread syz-fuzzer 75692 140960 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 51536 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 491602 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 282916 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 49001 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 232165 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 401648 39327 0 3 0x4000082 thrsleep syz-fuzzer 75692 498875 39327 0 3 0x4000082 thrsleep syz-fuzzer 39327 175414 20408 0 3 0x10008a sigsusp ksh 20408 380034 10134 0 3 0x9a kqread sshd 4203 65385 1 0 3 0x100083 ttyin getty 10134 381115 1 0 3 0x88 kqread sshd 70999 490519 82043 73 3 0x1100090 kqread syslogd 82043 518239 1 0 3 0x100082 netio syslogd 67538 518929 1 0 3 0x100080 kqread resolvd 60886 19883 31410 77 3 0x100092 kqread dhcpleased 24064 29484 31410 77 3 0x100092 kqread dhcpleased 31410 269872 1 0 3 0x80 kqread dhcpleased 39976 505670 0 0 3 0x14200 bored smr 86284 93580 0 0 2 0x14200 zerothread 14248 439480 0 0 3 0x14200 aiodoned aiodoned 77998 64061 0 0 3 0x14200 syncer update 92072 441741 0 0 3 0x14200 cleaner cleaner 59479 387872 0 0 3 0x14200 reaper reaper 68612 195900 0 0 3 0x14200 pgdaemon pagedaemon 62130 241818 0 0 3 0x14200 bored viomb 22167 176795 0 0 3 0x40014200 acpi0 acpi0 70605 440120 0 0 3 0x40014200 idle1 50640 459045 0 0 3 0x14200 bored softnet 89251 487805 0 0 3 0x14200 bored systqmp 44130 7864 0 0 3 0x14200 bored systq 26843 93521 0 0 3 0x40014200 bored softclock 24699 427225 0 0 3 0x40014200 idle0 1 392192 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 835 (syz-executor.3) thread 0xffff8000ffff5ce0 (356742) shared rwlock vmmaplk r = 0 (0xfffffd8067ecd8d0) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 87045 (syz-executor.1) thread 0xffff8000fffecd30 (173208) exclusive rwlock amaplk r = 0 (0xfffffd80792107f8) #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 (0xfffffd8067ecd310) #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 (0xffffffff829bfed8) #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 ip6_sysctl+0x249 sys/netinet6/ip6_input.c:1470 #6 sys_sysctl+0x209 sys/kern/kern_sysctl.c:249 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff82992030) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 6410K 6419K 78643K 11310 0 pcb 13 12K 14K 78643K 17 0 rtable 272 7K 8K 78643K 1500 0 ifaddr 81 17K 17K 78643K 139 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 72 0 ioctlops 0 0K 2K 78643K 156 0 iov 0 0K 36K 78643K 1756 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 3542 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 96 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2518 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 117K 78643K 11851 0 sigio 0 0K 0K 78643K 203 0 proc 56 74K 111K 78643K 1413 0 subproc 104 6K 6K 78643K 208 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 1K 78643K 9140 0 in_multi 99 6K 7K 78643K 3844 0 ether_multi 1 0K 0K 78643K 64 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 187 837K 837K 78643K 187 0 exec 0 0K 2K 78643K 2684 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 461 97K 111K 78643K 154777 0 UVM aobj 131 8K 8K 78643K 138 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 340 0 NDP 11 0K 2K 78643K 51 0 temp 125 4707K 4771K 78643K 31106 0 kqueue 12 18K 30K 78643K 989 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 1199 0 1196 15 12 3 3 0 8 2 rtentry 112 237 0 110 4 0 4 4 0 8 0 unpcb 136 6968 0 6955 73 70 3 9 0 8 2 syncache 296 111 0 111 21 21 0 1 0 8 0 tcpqe 32 404 0 404 12 12 0 1 0 8 0 tcpcb 736 5956 0 5947 188 178 10 21 0 8 8 arp 120 35 0 17 1 0 1 1 0 8 0 ipq 40 22 0 22 9 8 1 1 0 8 1 ipqe 40 53 0 53 9 8 1 1 0 8 1 inpcb 304 18439 0 18429 185 175 10 16 0 8 8 rttmr 72 77 0 74 1 0 1 1 0 8 0 ip6q 72 70 0 68 8 7 1 1 0 8 0 ip6af 40 138 0 136 8 7 1 1 0 8 0 nd6 48 81 0 43 1 0 1 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1068 0 487 40 3 37 37 0 8 0 art_table 32 1069 0 487 5 0 5 5 0 8 0 art_node 16 236 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2516 0 2506 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17372 0 15907 92 0 92 92 0 8 0 ffsino 272 17372 0 15907 98 0 98 98 0 8 0 nchpl 144 33212 0 31586 62 0 62 62 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 109166 0 109166 3 2 1 2 0 8 1 percpumem 16 48 0 8 1 0 1 1 0 8 0 scxspl 216 100933 0 100933 31 30 1 8 0 8 1 plimitpl 152 2857 0 2835 9 8 1 2 0 8 0 sigapl 424 12108 0 12056 7 1 6 7 0 8 0 futexpl 64 107263 0 107257 2 1 1 1 0 8 0 knotepl 120 877 0 0 17 0 17 17 0 8 0 kqueuepl 216 4200 0 4190 65 60 5 6 0 8 4 pipepl 336 2160 0 2132 58 50 8 13 0 8 5 fdescpl 496 12093 0 12057 7 2 5 6 0 8 0 filepl 152 81524 0 81286 143 126 17 20 0 8 7 lockfpl 104 1912 0 1910 4 3 1 2 0 8 0 lockfspl 48 472 0 470 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 1161 0 1145 1 0 1 1 0 8 0 ucredpl 96 14062 0 14044 1 0 1 1 0 8 0 zombiepl 144 12057 0 12056 1 0 1 1 0 8 0 processpl 1064 12108 0 12056 5 1 4 4 0 8 0 procpl 672 35282 0 35211 24 16 8 8 0 8 1 sosppl 168 164 0 164 18 18 0 1 0 8 0 sockpl 480 26937 0 26911 496 484 12 35 0 8 8 mcl64k 65536 49 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 3 1 2 2 0 8 0 mcl9k 9216 32 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 31 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 319 0 0 22 3 19 22 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 3934 0 0 235 0 235 235 0 8 0 bufpl 288 22125 0 15790 453 0 453 453 0 8 0 anonpl 24 3466820 0 3451969 286 176 110 116 0 186 5 amapchunkpl 152 376048 0 375213 119 84 35 47 0 158 0 amappl16 200 34882 0 34469 201 171 30 36 0 8 8 amappl15 192 3062 0 3054 1 0 1 1 0 8 0 amappl14 184 29 0 22 1 0 1 1 0 8 0 amappl13 176 1620 0 1616 1 0 1 1 0 8 0 amappl12 168 1871 0 1859 1 0 1 1 0 8 0 amappl11 160 887 0 876 1 0 1 1 0 8 0 amappl10 152 70 0 63 1 0 1 1 0 8 0 amappl9 144 4069 0 4056 1 0 1 1 0 8 0 amappl8 136 2297 0 2127 7 1 6 6 0 8 0 amappl7 128 1075 0 1063 1 0 1 1 0 8 0 amappl6 120 3814 0 3788 2 1 1 2 0 8 0 amappl5 112 10249 0 10226 1 0 1 1 0 8 0 amappl4 104 2811 0 2780 2 1 1 2 0 8 0 amappl3 96 4484 0 4465 1 0 1 1 0 8 0 amappl2 88 2800 0 2745 3 1 2 3 0 8 0 amappl1 80 220378 0 219731 25 10 15 18 0 8 0 amappl 88 153611 0 153317 9 1 8 8 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 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 12093 0 12057 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12093 0 12057 1 0 1 1 0 8 0 vmmpekpl 168 96490 0 96429 4 0 4 4 0 8 0 vmmpepl 168 1106752 0 1103845 257 125 132 139 0 357 1 vmsppl 368 12092 0 12057 4 0 4 4 0 8 0 rwobjpl 56 276598 0 269046 126 16 110 110 0 8 0 pdppl 4096 24193 0 24114 301 220 81 91 0 8 2 pvpl 32 5704565 0 5684100 555 360 195 254 0 265 15 pmappl 248 12092 0 12057 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1513 0 458 31 0 31 31 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82989ff0) 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(ffffffff829bfcd0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829bfcd0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff829bfcd0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829bfcd0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff80002e3b65a0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002e3b65a0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb0715c5f80, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82989ff0) 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(ffffffff829bfcd0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829bfcd0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff829bfcd0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829bfcd0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff80002e3b65a0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002e3b65a0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb0715c5f80, 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:440 panic(ffffffff82587927) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb397,ffffffff82557384,66b,ffffffff82566b58) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffecd30,ffff80002e3aa658,ffff80002e3aa6b0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3aa720) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3aa720) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fdc36eb480, count: 7 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82587927) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb397,ffffffff82557384,66b,ffffffff82566b58) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067ecd2f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffecd30,ffff80002e3aa658,ffff80002e3aa6b0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3aa720) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3aa720) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fdc36eb480, count: -8