panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1270 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *381236 80907 0 0x14000 0x200 0K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82599183) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826118aa,ffffffff8258927d,4f6,ffffffff825bf82e) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd80069f8560) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd807a9f18b8,b08e8cda000,b08e8ed9000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807a9f18b8,fffffd806c6f1c88,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807a9f18b8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021142d28) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1270 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82599183) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826118aa,ffffffff8258927d,4f6,ffffffff825bf82e) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd80069f8560) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd807a9f18b8,b08e8cda000,b08e8ed9000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807a9f18b8,fffffd806c6f1c88,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807a9f18b8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021142d28) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800021149260 rbx 0xffffffff829d1c5f cpu_info_full_primary+0x2c5f rdx 0 rcx 0 rax 0xffff800021142d28 r8 0x101010101010101 r9 0x8080808080808080 r10 0x936fde138f3bdf38 r11 0x3942799516529858 r12 0xffffffff829d1a60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81043738 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021149250 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=381236 stat=onproc flags process=14000 proc=200 pri=83, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021142fc8,0xffff800021142a98 process=0xffff8000ffffe568 user=0xffff800021144000, vmspace=0xffffffff82a8af10 estcpu=36, cpticks=21, pctcpu=6.37 user=0, sys=369, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68245 331293 11481 0 2 0x482 syz-executor.0 35500 142167 0 0 3 0x14200 acct acct 51183 305030 11481 0 2 0x482 syz-executor.2 39754 390167 11481 0 3 0x82 wait syz-executor.6 24504 237155 11481 0 2 0x482 syz-executor.3 94456 335954 11481 0 3 0x82 wait syz-executor.7 43519 512613 11481 0 2 0x482 syz-executor.1 61236 2952 11481 0 3 0x82 piperd syz-executor.4 71424 510039 0 0 3 0x14280 nfsidl nfsio 81223 385000 0 0 3 0x14280 nfsidl nfsio 20468 350622 0 0 3 0x14280 nfsidl nfsio 42529 149550 0 0 3 0x14280 nfsidl nfsio 11551 392381 0 0 3 0x14280 nfsidl nfsio 54685 158139 0 0 3 0x14280 nfsidl nfsio 12064 404131 0 0 3 0x14280 nfsidl nfsio 8626 477725 0 0 3 0x14280 nfsidl nfsio 79814 292077 0 0 3 0x14280 nfsidl nfsio 43096 518954 0 0 3 0x14280 nfsidl nfsio 29030 73126 0 0 3 0x14280 nfsidl nfsio 28487 149991 0 0 3 0x14280 nfsidl nfsio 43782 496799 0 0 3 0x14280 nfsidl nfsio 51092 466808 0 0 3 0x14280 nfsidl nfsio 65962 488697 0 0 3 0x14280 nfsidl nfsio 47614 299132 0 0 3 0x14280 nfsidl nfsio 22648 492787 0 0 3 0x14280 nfsidl nfsio 22011 167920 0 0 3 0x14280 nfsidl nfsio 96522 169364 0 0 3 0x14280 nfsidl nfsio 92222 286438 0 0 3 0x14280 nfsidl nfsio 51723 247066 1 0 3 0x100083 ttyin getty 13582 232030 0 0 3 0x14200 bored sosplice 11481 18766 1326 0 2 0x482 syz-fuzzer 11481 129340 1326 0 2 0x4000482 syz-fuzzer 11481 305298 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 233448 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 447647 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 117269 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 384738 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 407940 1326 0 3 0x4000082 thrsleep syz-fuzzer 11481 172354 1326 0 3 0x4000082 thrsleep syz-fuzzer 1326 223065 55888 0 3 0x10008a sigsusp ksh 55888 492304 3183 0 3 0x9a kqread sshd 3183 12953 1 0 3 0x88 kqread sshd 30700 141298 19856 74 2 0x1100492 pflogd 19856 150835 1 0 3 0x80 netio pflogd 14900 446394 76949 73 2 0x1100090 syslogd 76949 313494 1 0 3 0x100082 netio syslogd 67313 103921 1 0 3 0x100080 kqread resolvd 59650 52599 62307 77 3 0x100092 kqread dhcpleased 67521 433067 62307 77 3 0x100092 kqread dhcpleased 62307 271455 1 0 3 0x80 kqread dhcpleased 32569 418697 0 0 3 0x14200 bored smr 61907 149981 0 0 2 0x14200 zerothread 69389 227960 0 0 3 0x14200 aiodoned aiodoned 95647 717 0 0 2 0x14600 update 26864 224493 0 0 3 0x14200 cleaner cleaner *80907 381236 0 0 7 0x14200 reaper 76328 250736 0 0 3 0x14200 pgdaemon pagedaemon 40958 466717 0 0 3 0x14200 bored viomb 89924 416566 0 0 3 0x40014200 acpi0 acpi0 9830 403716 0 0 7 0x40014200 idle1 83230 376640 0 0 3 0x14200 bored softnet 56461 446901 0 0 3 0x14200 bored softnet 33048 169060 0 0 3 0x14200 bored softnet 52196 444572 0 0 3 0x14200 bored softnet 5418 115500 0 0 2 0x14200 systqmp 54765 277479 0 0 2 0x14200 systq 1032 345599 0 0 2 0x40014200 softclock 44436 177818 0 0 3 0x40014200 idle0 1 466654 0 0 3 0x82 wait init 0 0 -1 0 2 0x10200 swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82b9a088) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x21e sys/uvm/uvm_fault.c:1671 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #7 reaper+0x19a sys/kern/kern_exit.c:454 #8 proc_trampoline+0x1c Process 80907 (reaper) thread 0xffff800021142d28 (381236) exclusive rwlock uobjlk r = 0 (0xfffffd805b1249b0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 uvm_fault_unwire_locked+0x1c6 sys/uvm/uvm_fault.c:1659 #3 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #4 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #4 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #5 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #6 reaper+0x19a sys/kern/kern_exit.c:454 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a8a510) #0 witness_lock+0x44d #1 uvm_unmap_kill_entry_withlock+0x4c sys/uvm/uvm_map.c:2134 #2 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #2 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #3 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #4 reaper+0x19a sys/kern/kern_exit.c:454 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82b9a088) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x21e sys/uvm/uvm_fault.c:1671 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #7 reaper+0x19a sys/kern/kern_exit.c:454 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6508K 10768K 78643K 43836 0 pcb 13 22K 27K 78643K 3585 0 rtable 230 21K 23K 78643K 4736 0 ifaddr 98 28K 34K 78643K 2910 0 sysctl 3 1K 3K 78643K 8 0 counters 54 35K 36K 78643K 566 0 ioctlops 0 0K 6K 78643K 11586 0 iov 0 0K 32K 78643K 3122 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1469 92K 92K 78643K 11414 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 188 0 VM map 2 1K 1K 78643K 2 0 sem 19 10K 20K 78643K 1305 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 9 29K 89K 78643K 19689 0 sigio 0 0K 0K 78643K 448 0 proc 72 91K 127K 78643K 3239 0 subproc 91 5K 6K 78643K 1001 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 15146 0 in_multi 74 5K 7K 78643K 1217 0 ether_multi 1 0K 0K 78643K 131 0 mrt 1 0K 0K 78643K 135 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 4345 0 pfkey data 0 0K 0K 78643K 12 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 608 1278K 1281K 78643K 110135 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 911 0 NDP 12 0K 2K 78643K 448 0 temp 177 4826K 21156K 78643K 190733 0 kqueue 12 18K 30K 78643K 1715 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 1701 0 1698 25 24 1 5 0 8 0 rtentry 112 1364 0 1289 4 0 4 4 0 8 0 unpcb 136 11094 0 11079 140 139 1 9 0 8 0 syncache 296 56 0 56 16 16 0 1 0 8 0 tcpqe 32 57 0 57 7 7 0 1 0 8 0 tcpcb 736 19955 0 19951 478 469 9 21 0 8 8 arp 120 215 0 201 1 0 1 1 0 8 0 inpcb 312 31804 0 31797 350 341 9 17 0 8 8 nd6 48 273 0 256 1 0 1 1 0 8 0 pkpcb 40 55 0 55 12 12 0 1 0 8 0 kcovpl 48 77 0 70 1 0 1 1 0 8 0 ppxss 1248 114 0 114 19 19 0 1 0 8 0 pfstscr 40 190 0 190 9 9 0 1 0 8 0 pffrag 232 165 0 163 8 7 1 1 0 482 0 pffrnode 88 165 0 163 8 7 1 1 0 8 0 pffrent 40 486 0 484 9 8 1 1 0 8 0 pfosfp 40 1495 0 1490 6 5 1 5 0 8 0 pfosfpen 112 1495 0 1483 23 22 1 22 0 8 0 pfrke_plain 168 8 0 8 1 1 0 1 0 8 0 pfrktable 1344 350 0 322 15 12 3 3 0 8 0 pftag 88 29 0 12 1 0 1 1 0 8 0 pfqueue 264 6 0 6 2 2 0 1 0 8 0 pfstitem 24 81 0 79 1 0 1 1 0 8 0 pfstkey 112 473 0 471 1 0 1 1 0 8 0 pfstate 336 275 0 273 3 2 1 3 0 8 0 pfsrctr 152 44 0 44 2 2 0 1 0 8 0 pfrule 1360 3848 0 3725 17 6 11 11 0 8 0 rttmr 64 38 0 38 11 11 0 1 0 8 0 art_heap8 4096 4 0 3 3 2 1 3 0 8 0 art_heap4 256 6468 0 6173 77 53 24 30 0 8 0 art_table 32 6472 0 6176 5 1 4 4 0 8 0 art_node 16 1289 0 1224 1 0 1 1 0 8 0 sysvmsgpl 40 72 0 70 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 1290 0 1273 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 26939 0 25428 95 0 95 95 0 8 0 ffsino 272 26939 0 25428 102 0 102 102 0 8 0 nchpl 144 52140 0 50504 63 0 63 63 0 8 0 rtmask 32 16 0 16 1 1 0 1 0 8 0 uvmvnodes 80 6270 0 0 128 0 128 128 0 8 0 vnodes 224 6270 0 0 369 0 369 369 0 8 0 namei 1024 197035 0 197035 8 7 1 2 0 8 1 percpumem 16 295 0 256 1 0 1 1 0 8 0 vcpupl 2048 209 0 0 27 0 27 27 0 8 0 vmpool 560 311 0 102 17 2 15 15 0 8 0 pfiaddrpl 120 168 0 105 9 7 2 2 0 8 0 kstatmem 264 536 0 512 4 2 2 3 0 8 0 scsiplug 72 13 0 13 4 4 0 1 0 8 0 scxspl 216 159045 0 159045 25 24 1 8 0 8 1 plimitpl 152 2860 0 2844 1 0 1 1 0 8 0 sigapl 424 19927 0 19859 13 5 8 8 0 8 0 futexpl 64 201896 0 201896 6 5 1 1 0 8 1 knotepl 120 1183 0 0 18 2 16 17 0 8 0 kqueuepl 216 5154 0 5146 95 94 1 8 0 8 0 pipepl 336 4053 0 4028 100 97 3 11 0 8 0 fdescpl 496 19844 0 19822 6 2 4 5 0 8 0 filepl 152 148031 0 147813 272 255 17 22 0 8 6 lockfpl 104 4625 0 4623 10 9 1 2 0 8 0 lockfspl 48 1348 0 1346 1 0 1 1 0 8 0 sessionpl 144 96 0 79 1 0 1 1 0 8 0 pgrppl 48 1777 0 1760 1 0 1 1 0 8 0 ucredpl 96 15292 0 15279 1 0 1 1 0 8 0 zombiepl 144 19866 0 19859 1 0 1 1 0 8 0 processpl 1064 19927 0 19859 6 1 5 5 0 8 0 procpl 672 50927 0 50843 38 30 8 9 0 8 0 srpgc 96 79 0 79 20 20 0 1 0 8 0 sosppl 168 134 0 134 30 30 0 1 0 8 0 sockpl 480 44672 0 44647 979 967 12 35 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 27 0 0 4 1 3 3 0 8 0 mcl4k 4096 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 377 0 0 21 0 21 21 0 8 0 mtagpl 96 1623 0 0 21 0 21 21 0 8 0 mbufpl 256 6949 0 0 389 0 389 389 0 8 0 bufpl 288 32480 0 25725 483 0 483 483 0 8 0 anonpl 24 3773439 0 3752633 392 245 147 147 0 186 0 amapchunkpl 152 330446 0 329328 114 69 45 50 0 158 0 amappl16 200 53649 0 53009 184 148 36 47 0 8 0 amappl15 192 3390 0 3388 3 2 1 1 0 8 0 amappl14 184 1072 0 1064 1 0 1 1 0 8 0 amappl13 176 1565 0 1561 1 0 1 1 0 8 0 amappl12 168 3361 0 3358 1 0 1 1 0 8 0 amappl11 160 1187 0 1166 1 0 1 1 0 8 0 amappl10 152 3387 0 3376 1 0 1 1 0 8 0 amappl9 144 2977 0 2967 1 0 1 1 0 8 0 amappl8 136 5860 0 5699 7 1 6 6 0 8 0 amappl7 128 4146 0 4119 1 0 1 1 0 8 0 amappl6 120 3141 0 3108 10 8 2 2 0 8 1 amappl5 112 19702 0 19681 1 0 1 1 0 8 0 amappl4 104 4164 0 4118 7 5 2 2 0 8 0 amappl3 96 60481 0 60420 2 0 2 2 0 8 0 amappl2 88 23416 0 23346 3 1 2 3 0 8 0 amappl1 80 464112 0 463411 24 9 15 20 0 8 0 amappl 88 107904 0 107610 8 1 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 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 20155 0 19918 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20155 0 19918 2 0 2 2 0 8 0 vmmpekpl 168 136856 0 136782 5 1 4 4 0 8 0 vmmpepl 168 1927726 0 1924441 501 346 155 190 0 357 1 vmsppl 368 20154 0 19917 26 4 22 22 0 8 0 rwobjpl 56 461692 0 453329 134 16 118 120 0 8 0 pdppl 4096 40317 0 40043 1164 888 276 278 0 8 2 pvpl 32 7672820 0 7650311 720 454 266 266 0 265 42 pmappl 248 20154 0 19917 16 1 15 15 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3360 0 1872 43 0 43 43 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82599183) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826118aa,ffffffff8258927d,4f6,ffffffff825bf82e) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd80069f8560) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd807a9f18b8,b08e8cda000,b08e8ed9000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807a9f18b8,fffffd806c6f1c88,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807a9f18b8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807a9f18b8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021142d28) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5