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 *315531 28793 32767 0x10 0x4000000 1K syz-executor.0 148738 7673 32767 0x10 0x4000000 0 syz-executor.2 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82576769) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ea40b,ffffffff82549618,66b,ffffffff82558d47) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffee548,ffff80002af63398,ffff80002af633f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af63460) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af63460) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x96f960fd8f0, 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(ffffffff82576769) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ea40b,ffffffff82549618,66b,ffffffff82558d47) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffee548,ffff80002af63398,ffff80002af633f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af63460) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af63460) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x96f960fd8f0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002af63120 rbx 0xffff800020ce9bff rdx 0 rcx 0 rax 0xffff8000fffee548 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa4421ab1071d6c0d r11 0xcb453dec99f64bfc r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff82285cc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002af63110 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=315531 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=66, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffef508,0xffff8000ffff42b0 process=0xffff800028533a50 user=0xffff80002af5e000, vmspace=0xfffffd806c6e42f8 estcpu=33, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17508 239728 1168 32767 2 0x10 syz-executor.4 60362 472270 96532 32767 2 0x10 syz-executor.1 28793 32906 58281 32767 2 0x10 syz-executor.0 28793 342608 58281 32767 3 0x4000090 fsleep syz-executor.0 *28793 315531 58281 32767 7 0x4000010 syz-executor.0 28793 77792 58281 32767 2 0x4000010 syz-executor.0 7673 493873 34401 32767 2 0x10 syz-executor.2 7673 148738 34401 32767 7 0x4000010 syz-executor.2 93074 78397 70197 32767 2 0x10 syz-executor.5 93074 334271 70197 32767 2 0x4000010 syz-executor.5 16438 516607 51256 32767 2 0x10 syz-executor.7 16438 262918 51256 32767 3 0x4000090 fsleep syz-executor.7 90606 481619 15558 32767 2 0x10 syz-executor.3 58281 133505 71821 32767 3 0x90 nanoslp syz-executor.0 71821 513001 22970 0 3 0x82 wait syz-executor.0 79816 508505 0 0 3 0x14200 bored sosplice 92173 157780 78858 32767 3 0x90 nanoslp syz-executor.6 51256 238336 28218 32767 3 0x90 nanoslp syz-executor.7 15558 223108 58304 32767 2 0x10 syz-executor.3 70197 255587 43846 32767 3 0x90 nanoslp syz-executor.5 43846 91398 22970 0 3 0x82 wait syz-executor.5 1168 134730 13948 32767 3 0x90 nanoslp syz-executor.4 78858 122436 22970 0 3 0x82 wait syz-executor.6 28218 506561 22970 0 3 0x82 wait syz-executor.7 34401 24398 94530 32767 3 0x90 nanoslp syz-executor.2 13948 423555 22970 0 3 0x82 wait syz-executor.4 96532 116418 23426 32767 3 0x90 nanoslp syz-executor.1 94530 255234 22970 0 3 0x82 wait syz-executor.2 58304 477455 22970 0 3 0x82 wait syz-executor.3 23426 172538 22970 0 3 0x82 wait syz-executor.1 22970 304991 57572 0 3 0x82 thrsleep syz-fuzzer 22970 237670 57572 0 3 0x4000082 thrsleep syz-fuzzer 22970 465047 57572 0 3 0x4000082 thrsleep syz-fuzzer 22970 520334 57572 0 3 0x4000082 thrsleep syz-fuzzer 22970 354470 57572 0 3 0x4000082 kqread syz-fuzzer 22970 418247 57572 0 3 0x4000082 thrsleep syz-fuzzer 22970 219482 57572 0 3 0x4000082 thrsleep syz-fuzzer 22970 58267 57572 0 3 0x4000082 thrsleep syz-fuzzer 57572 459765 27573 0 3 0x10008a sigsusp ksh 27573 428697 75490 0 3 0x9a kqread sshd 59578 53335 1 0 3 0x100083 ttyin getty 75490 280319 1 0 3 0x88 kqread sshd 11400 148304 53211 73 3 0x1100090 kqread syslogd 53211 40644 1 0 3 0x100082 netio syslogd 69144 480570 1 0 3 0x100080 kqread resolvd 86301 234717 66042 77 3 0x100092 kqread dhcpleased 64215 401170 66042 77 3 0x100092 kqread dhcpleased 66042 414511 1 0 3 0x80 kqread dhcpleased 50514 18239 0 0 3 0x14200 bored smr 49991 490248 0 0 2 0x14200 zerothread 56803 68878 0 0 3 0x14200 aiodoned aiodoned 15429 422985 0 0 3 0x14200 syncer update 4533 58146 0 0 3 0x14200 cleaner cleaner 9225 288250 0 0 3 0x14200 reaper reaper 65087 295381 0 0 3 0x14200 pgdaemon pagedaemon 96723 281073 0 0 3 0x14200 bored viomb 42909 185692 0 0 3 0x40014200 acpi0 acpi0 3070 382310 0 0 3 0x40014200 idle1 69203 137533 0 0 3 0x14200 bored softnet 78932 72177 0 0 3 0x14200 bored systqmp 93038 317677 0 0 3 0x14200 bored systq 41647 273795 0 0 3 0x40014200 bored softclock 31928 382531 0 0 3 0x40014200 idle0 1 1620 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 28793 (syz-executor.0) thread 0xffff8000fffee548 (315531) exclusive rwlock amaplk r = 0 (0xfffffd80790213c8) #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 (0xfffffd806c6e4310) #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 (0xffffffff82a3b270) #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 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1752 #7 uvm_fault_check+0x603 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #7 uvm_fault_check+0x603 sys/uvm/uvm_fault.c:712 #8 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1580 #10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:240 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff828fe3f0) #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 7673 (syz-executor.2) thread 0xffff8000ffff5ce0 (148738) shared rwlock vmmaplk r = 0 (0xfffffd806c6e48d0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10176 6407K 6419K 78643K 11272 0 pcb 13 12K 14K 78643K 17 0 rtable 246 7K 7K 78643K 574 0 ifaddr 81 16K 16K 78643K 96 0 counters 56 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 41 0 iov 0 0K 24K 78643K 532 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1791 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 22 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 850 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 125K 78643K 2896 0 sigio 0 0K 0K 78643K 14 0 proc 56 74K 111K 78643K 663 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 504 0 in_multi 99 6K 6K 78643K 147 0 ether_multi 1 0K 0K 78643K 9 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 864 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 329 83K 98K 78643K 38548 0 UVM aobj 111 3K 3K 78643K 111 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 146 0 NDP 11 0K 2K 78643K 33 0 temp 125 4703K 4767K 78643K 10461 0 kqueue 12 18K 26K 78643K 253 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 120 374 0 371 7 6 1 3 0 8 0 rtentry 112 139 0 25 4 0 4 4 0 8 0 unpcb 136 2685 0 2672 14 13 1 6 0 8 0 syncache 296 26 0 26 7 7 0 1 0 8 0 tcpqe 32 200 0 200 4 4 0 1 0 8 0 tcpcb 736 3893 0 3878 64 56 8 16 0 8 5 arp 120 23 0 4 1 0 1 1 0 8 0 inpcb 304 4955 0 4942 36 32 4 14 0 8 2 ip6q 72 44 0 43 4 3 1 1 0 8 0 ip6af 40 91 0 90 4 3 1 1 0 8 0 nd6 48 35 0 8 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 548 0 90 29 0 29 29 0 8 0 art_table 32 549 0 90 4 0 4 4 0 8 0 art_node 16 138 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 72 0 67 1 0 1 1 0 8 0 semapl 112 848 0 838 1 0 1 1 0 8 0 shmpl 112 108 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5195 0 3749 91 0 91 91 0 8 0 ffsino 272 5195 0 3749 97 0 97 97 0 8 0 nchpl 144 9135 0 7513 62 0 62 62 0 8 0 uvmvnodes 80 5334 0 0 109 0 109 109 0 8 0 vnodes 224 5334 0 0 314 0 314 314 0 8 0 namei 1024 29380 0 29380 2 1 1 2 0 8 1 percpumem 16 42 0 2 1 0 1 1 0 8 0 scxspl 216 29994 0 29994 12 11 1 8 0 8 1 plimitpl 152 678 0 656 4 3 1 2 0 8 0 sigapl 424 3166 0 3114 7 0 7 7 0 8 0 futexpl 64 26505 0 26503 3 2 1 1 0 8 0 knotepl 120 423 0 0 12 1 11 11 0 8 0 kqueuepl 216 1075 0 1067 19 17 2 5 0 8 1 pipepl 336 968 0 940 19 16 3 8 0 8 0 fdescpl 496 3151 0 3115 7 1 6 6 0 8 0 filepl 152 23668 0 23434 41 29 12 20 0 8 2 lockfpl 104 748 0 746 3 2 1 2 0 8 0 lockfspl 48 214 0 212 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 35 0 19 1 0 1 1 0 8 0 ucredpl 96 2800 0 2782 1 0 1 1 0 8 0 zombiepl 144 3115 0 3114 1 0 1 1 0 8 0 processpl 1064 3166 0 3114 5 1 4 4 0 8 0 procpl 672 8653 0 8588 10 3 7 8 0 8 1 sosppl 168 35 0 35 4 3 1 1 0 8 1 sockpl 480 8096 0 8069 156 147 9 29 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 4 1 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 180 0 0 20 0 20 20 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 443 0 0 27 0 27 27 0 8 0 bufpl 288 8125 0 1790 453 0 453 453 0 8 0 anonpl 24 874486 0 860022 145 43 102 121 0 186 0 amapchunkpl 152 97143 0 96393 67 34 33 45 0 158 1 amappl16 200 8883 0 8450 66 42 24 36 0 8 0 amappl15 192 1084 0 1075 1 0 1 1 0 8 0 amappl14 184 726 0 717 1 0 1 1 0 8 0 amappl13 176 790 0 786 1 0 1 1 0 8 0 amappl12 168 28 0 23 1 0 1 1 0 8 0 amappl11 160 407 0 394 1 0 1 1 0 8 0 amappl10 152 49 0 45 1 0 1 1 0 8 0 amappl9 144 815 0 811 1 0 1 1 0 8 0 amappl8 136 694 0 627 3 0 3 3 0 8 0 amappl7 128 124 0 112 1 0 1 1 0 8 0 amappl6 120 564 0 540 2 1 1 2 0 8 0 amappl5 112 2757 0 2739 1 0 1 1 0 8 0 amappl4 104 1593 0 1563 2 0 2 2 0 8 0 amappl3 96 454 0 443 1 0 1 1 0 8 0 amappl2 88 1430 0 1384 3 1 2 3 0 8 0 amappl1 80 59610 0 59004 18 3 15 18 0 8 0 amappl 88 37976 0 37740 7 0 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 72 110 0 0 2 0 2 2 0 8 0 uaddrrnd 24 3151 0 3115 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3151 0 3115 1 0 1 1 0 8 0 vmmpekpl 168 29565 0 29507 4 0 4 4 0 8 0 vmmpepl 168 289861 0 287188 154 29 125 133 0 357 4 vmsppl 368 3150 0 3115 4 0 4 4 0 8 0 rwobjpl 56 76956 0 70150 96 0 96 96 0 8 0 pdppl 4096 6309 0 6230 151 70 81 95 0 8 2 pvpl 32 1571820 0 1552270 277 101 176 244 0 265 1 pmappl 248 3150 0 3115 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 976 0 146 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff828eaff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a3b068) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a3b068) at __mp_lock+0x133 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f witness_assert(fffffd806c6e48d0,2) at witness_assert+0x152 sys/kern/subr_witness.c:1944 rw_exit_read(fffffd806c6e48c0) at rw_exit_read+0x56 rw_assert_rdlock sys/kern/kern_rwlock.c:395 [inline] rw_exit_read(fffffd806c6e48c0) at rw_exit_read+0x56 sys/kern/kern_rwlock.c:137 uvm_fault_upper(ffff80002e37bc90,ffff80002e37bcc8,ffff80002e37bb90,0) at uvm_fault_upper+0x377 sys/uvm/uvm_fault.c:1095 uvm_fault(fffffd806c6e48b8,640c566f000,0,2) at uvm_fault+0x164 sys/uvm/uvm_fault.c:610 upageflttrap(ffff80002e37be00,640c566f608) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002e37be00) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6401eb581e0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff828eaff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a3b068) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a3b068) at __mp_lock+0x133 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f witness_assert(fffffd806c6e48d0,2) at witness_assert+0x152 sys/kern/subr_witness.c:1944 rw_exit_read(fffffd806c6e48c0) at rw_exit_read+0x56 rw_assert_rdlock sys/kern/kern_rwlock.c:395 [inline] rw_exit_read(fffffd806c6e48c0) at rw_exit_read+0x56 sys/kern/kern_rwlock.c:137 uvm_fault_upper(ffff80002e37bc90,ffff80002e37bcc8,ffff80002e37bb90,0) at uvm_fault_upper+0x377 sys/uvm/uvm_fault.c:1095 uvm_fault(fffffd806c6e48b8,640c566f000,0,2) at uvm_fault+0x164 sys/uvm/uvm_fault.c:610 upageflttrap(ffff80002e37be00,640c566f608) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002e37be00) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6401eb581e0, count: -14 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(ffffffff82576769) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ea40b,ffffffff82549618,66b,ffffffff82558d47) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffee548,ffff80002af63398,ffff80002af633f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af63460) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af63460) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x96f960fd8f0, count: 7 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82576769) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ea40b,ffffffff82549618,66b,ffffffff82558d47) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c6e42f8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000fffee548,ffff80002af63398,ffff80002af633f0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af63460) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af63460) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x96f960fd8f0, count: -8