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 493545 99230 32767 0x10 0x4000000 0 syz-executor.0 * 79269 99230 32767 0x10 0x4000000 1K syz-executor.0 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(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212127f0,ffff80002e3f7d38,ffff80002e3f7d90) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3f7e00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7e00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d266b3940, 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(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212127f0,ffff80002e3f7d38,ffff80002e3f7d90) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3f7e00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7e00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d266b3940, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e3f7ac0 rbx 0xffff800020ce9bff rdx 0 rcx 0 rax 0xffff8000212127f0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xec424fe112369ee7 r11 0x763e11570e5633c r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81f186c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e3f7ab0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=79269 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021212fd0,0xffff800021212020 process=0xffff8000ffff8858 user=0xffff80002e3f2000, vmspace=0xfffffd8068f295d8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96466 425382 58184 32767 2 0x10 syz-executor.7 96466 137341 58184 32767 3 0x4000090 fsleep syz-executor.7 96466 47161 58184 32767 3 0x4000090 fsleep syz-executor.7 4647 360503 99186 32767 2 0x10 syz-executor.2 4647 486857 99186 32767 2 0x4000010 syz-executor.2 6943 246736 45058 32767 2 0x10 syz-executor.4 6943 305973 45058 32767 2 0x4000010 syz-executor.4 99230 388130 52784 32767 2 0x10 syz-executor.0 99230 493545 52784 32767 7 0x4000010 syz-executor.0 *99230 79269 52784 32767 7 0x4000010 syz-executor.0 99230 134179 52784 32767 2 0x4000010 syz-executor.0 58237 279512 19640 32767 2 0x10 syz-executor.1 58237 138803 19640 32767 3 0x4000090 fsleep syz-executor.1 58237 67673 19640 32767 3 0x4000090 fsleep syz-executor.1 30933 92013 72400 32767 2 0x10 syz-executor.3 30933 270655 72400 32767 3 0x4000090 fsleep syz-executor.3 75944 44207 31681 32767 2 0x10 syz-executor.6 60344 184406 21669 32767 3 0x90 nanoslp syz-executor.5 60344 336838 21669 32767 3 0x4000090 kqread syz-executor.5 31681 281661 68282 32767 3 0x90 nanoslp syz-executor.6 68282 7532 26928 0 3 0x82 wait syz-executor.6 45058 318589 28395 32767 3 0x90 nanoslp syz-executor.4 28395 298884 26928 0 3 0x82 wait syz-executor.4 99186 262588 70887 32767 3 0x90 nanoslp syz-executor.2 70887 338685 26928 0 3 0x82 wait syz-executor.2 43258 461027 0 0 3 0x14200 bored sosplice 58184 273640 98764 32767 3 0x90 nanoslp syz-executor.7 21669 451917 58778 32767 3 0x90 nanoslp syz-executor.5 98764 251022 26928 0 3 0x82 wait syz-executor.7 72400 513753 357 32767 3 0x90 nanoslp syz-executor.3 58778 367525 26928 0 3 0x82 wait syz-executor.5 357 484072 26928 0 3 0x82 wait syz-executor.3 19640 96117 26643 32767 3 0x90 nanoslp syz-executor.1 26643 18957 26928 0 3 0x82 wait syz-executor.1 52784 299350 22972 32767 3 0x90 nanoslp syz-executor.0 22972 181677 26928 0 3 0x82 wait syz-executor.0 26928 458455 93873 0 3 0x82 kqread syz-fuzzer 26928 142931 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 268218 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 237507 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 7946 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 447250 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 55686 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 480346 93873 0 3 0x4000082 thrsleep syz-fuzzer 26928 57884 93873 0 3 0x4000082 thrsleep syz-fuzzer 93873 303324 97029 0 3 0x10008a sigsusp ksh 97029 390770 29987 0 3 0x9a kqread sshd 96942 419984 1 0 3 0x100083 ttyin getty 29987 118321 1 0 3 0x88 kqread sshd 55244 108672 79131 73 3 0x1100090 kqread syslogd 79131 464859 1 0 3 0x100082 netio syslogd 95886 309523 1 0 3 0x100080 kqread resolvd 90278 402057 91402 77 3 0x100092 kqread dhcpleased 1778 14348 91402 77 3 0x100092 kqread dhcpleased 91402 18408 1 0 3 0x80 kqread dhcpleased 80359 215354 0 0 3 0x14200 bored smr 9539 422623 0 0 2 0x14200 zerothread 58850 254393 0 0 3 0x14200 aiodoned aiodoned 20331 77447 0 0 3 0x14200 syncer update 24163 353798 0 0 3 0x14200 cleaner cleaner 88801 307322 0 0 3 0x14200 reaper reaper 74523 215531 0 0 3 0x14200 pgdaemon pagedaemon 80873 135511 0 0 3 0x14200 bored viomb 72446 465722 0 0 3 0x40014200 acpi0 acpi0 59342 458240 0 0 3 0x40014200 idle1 40786 271944 0 0 3 0x14200 bored softnet 17310 139222 0 0 3 0x14200 bored systqmp 82354 247398 0 0 3 0x14200 bored systq 16026 223518 0 0 3 0x40014200 bored softclock 79990 340257 0 0 3 0x40014200 idle0 1 3025 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 99230 (syz-executor.0) thread 0xffff800021212fd0 (493545) 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 99230 (syz-executor.0) thread 0xffff8000212127f0 (79269) exclusive rwlock amaplk r = 0 (0xfffffd80669ed160) #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 (0xfffffd8068f295f0) #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 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 (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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 6412K 6419K 78643K 11319 0 pcb 13 16K 18K 78643K 19 0 rtable 282 8K 8K 78643K 2061 0 ifaddr 81 17K 17K 78643K 125 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 68 0 ioctlops 0 0K 2K 78643K 281 0 iov 0 0K 40K 78643K 3342 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 4117 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 184 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 5947 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 26 97K 113K 78643K 18942 0 sigio 0 0K 0K 78643K 358 0 proc 56 74K 99K 78643K 1652 0 subproc 104 6K 6K 78643K 182 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1441 0 in_multi 99 6K 7K 78643K 468 0 ether_multi 1 0K 0K 78643K 91 0 mrt 3 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 271 1208K 1208K 78643K 271 0 exec 0 0K 2K 78643K 4248 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 459 92K 108K 78643K 248625 0 UVM aobj 131 4K 4K 78643K 138 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 608 0 NDP 11 0K 2K 78643K 45 0 temp 126 4711K 4791K 78643K 47321 0 kqueue 13 20K 26K 78643K 1526 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 1706 0 1703 19 18 1 5 0 8 0 rtentry 112 222 0 90 4 0 4 4 0 8 0 unpcb 136 18947 0 18932 151 148 3 8 0 8 2 syncache 296 212 0 212 38 37 1 1 0 8 1 tcpqe 32 111 0 111 23 23 0 1 0 8 0 tcpcb 736 8443 0 8433 220 212 8 15 0 8 6 arp 120 32 0 14 1 0 1 1 0 8 0 ipq 40 117 0 117 11 10 1 1 0 8 1 ipqe 40 326 0 326 11 10 1 1 0 8 1 inpcb 312 57503 0 57493 504 497 7 26 0 8 6 rttmr 72 11 0 8 1 0 1 1 0 8 0 ip6q 72 22 0 22 6 6 0 1 0 8 0 ip6af 40 35 0 35 6 6 0 1 0 8 0 nd6 48 82 0 39 1 0 1 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1093 0 385 46 1 45 45 0 8 0 art_table 32 1094 0 385 6 0 6 6 0 8 0 art_node 16 221 0 99 1 0 1 1 0 8 0 sysvmsgpl 40 82 0 82 3 3 0 1 0 8 0 semapl 112 5945 0 5935 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 25909 0 24454 92 0 92 92 0 8 0 ffsino 272 25909 0 24454 98 0 98 98 0 8 0 nchpl 144 50599 0 48976 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 171765 0 171765 7 6 1 2 0 8 1 percpumem 16 46 0 6 1 0 1 1 0 8 0 scxspl 216 162728 0 162728 57 56 1 8 0 8 1 plimitpl 152 4417 0 4395 14 13 1 2 0 8 0 sigapl 424 19214 0 19162 7 0 7 7 0 8 0 futexpl 64 184139 0 184133 5 4 1 1 0 8 0 knotepl 120 1053 0 0 21 4 17 17 0 8 0 kqueuepl 216 6588 0 6579 113 112 1 8 0 8 0 pipepl 336 4717 0 4689 128 125 3 11 0 8 0 fdescpl 496 19199 0 19162 6 1 5 6 0 8 0 filepl 152 167274 0 166972 272 260 12 26 0 8 0 lockfpl 104 3112 0 3110 2 1 1 2 0 8 0 lockfspl 48 863 0 861 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 106 0 90 1 0 1 1 0 8 0 ucredpl 96 20044 0 20026 1 0 1 1 0 8 0 zombiepl 144 19162 0 19162 1 0 1 1 0 8 1 processpl 1064 19214 0 19162 4 0 4 4 0 8 0 procpl 672 57825 0 57754 33 26 7 8 0 8 1 sosppl 168 294 0 293 27 26 1 1 0 8 0 sockpl 480 79123 0 79095 1531 1519 12 45 0 8 8 mcl64k 65536 63 0 0 3 0 3 3 0 8 0 mcl16k 16384 37 0 0 4 1 3 3 0 8 1 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 57 0 0 3 1 2 2 0 8 0 mcl8k 8192 49 0 0 6 2 4 6 0 8 0 mcl4k 4096 41 0 0 3 0 3 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 355 0 0 19 4 15 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1425 0 0 48 0 48 48 0 8 0 bufpl 288 36034 0 29700 453 0 453 453 0 8 0 anonpl 24 5656288 0 5641061 291 179 112 123 0 186 0 amapchunkpl 152 634793 0 633951 249 202 47 48 0 158 10 amappl16 200 61537 0 61138 327 297 30 36 0 8 7 amappl15 192 2448 0 2441 1 0 1 1 0 8 0 amappl14 184 1244 0 1239 2 1 1 1 0 8 0 amappl13 176 3088 0 3083 1 0 1 1 0 8 0 amappl12 168 5127 0 5119 1 0 1 1 0 8 0 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 2404 0 2398 1 0 1 1 0 8 0 amappl9 144 4222 0 4214 1 0 1 1 0 8 0 amappl8 136 2483 0 2302 7 0 7 7 0 8 0 amappl7 128 1162 0 1149 1 0 1 1 0 8 0 amappl6 120 3970 0 3942 2 1 1 2 0 8 0 amappl5 112 21222 0 21197 1 0 1 1 0 8 0 amappl4 104 1352 0 1325 2 1 1 2 0 8 0 amappl3 96 6580 0 6563 1 0 1 1 0 8 0 amappl2 88 5962 0 5913 3 1 2 3 0 8 0 amappl1 80 346109 0 345440 18 3 15 18 0 8 0 amappl 88 247141 0 246853 12 4 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 19199 0 19162 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 19199 0 19162 1 0 1 1 0 8 0 vmmpekpl 168 164222 0 164174 3 0 3 3 0 8 0 vmmpepl 168 1759062 0 1756127 351 215 136 141 0 357 5 vmsppl 368 19198 0 19162 4 0 4 4 0 8 0 rwobjpl 56 439333 0 431779 144 35 109 111 0 8 0 pdppl 4096 38405 0 38324 365 284 81 89 0 8 0 pvpl 32 9239409 0 9218377 635 437 198 243 0 265 8 pmappl 248 19198 0 19162 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2007 0 1134 27 1 26 26 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __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(ffff80002e3f1020,ffff800021212fd0,120,ffffffff82583965,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800021212fd0,ffffffff828fc800,120,ffffffff82583965,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(47d7aaee390,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021212fd0,ffff80002e3f11b0,ffff80002e3f1210) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3f1280) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f1280) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d46722990, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __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(ffff80002e3f1020,ffff800021212fd0,120,ffffffff82583965,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800021212fd0,ffffffff828fc800,120,ffffffff82583965,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(47d7aaee390,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021212fd0,ffff80002e3f11b0,ffff80002e3f1210) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3f1280) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f1280) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d46722990, 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(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212127f0,ffff80002e3f7d38,ffff80002e3f7d90) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3f7e00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7e00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d266b3940, 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(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8068f295d8,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212127f0,ffff80002e3f7d38,ffff80002e3f7d90) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3f7e00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7e00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d266b3940, count: -8