panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1275 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 48172 18234 0 0x14000 0x200 0K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82573ee9) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ebcc0,ffffffff8256a418,4fb,ffffffff825a04dc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007162100) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8055b2cbb0,30f554ed000,30f556ec000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1668 uvm_unmap_kill_entry_withlock(fffffd8055b2cbb0,fffffd806a8a9aa8,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8055b2cbb0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9260) at reaper+0x18b sys/kern/kern_exit.c:457 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 1275 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82573ee9) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ebcc0,ffffffff8256a418,4fb,ffffffff825a04dc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007162100) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8055b2cbb0,30f554ed000,30f556ec000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1668 uvm_unmap_kill_entry_withlock(fffffd8055b2cbb0,fffffd806a8a9aa8,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8055b2cbb0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9260) at reaper+0x18b sys/kern/kern_exit.c:457 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211356a0 rbx 0xffffffff828ebbff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff8000210f9260 r8 0x101010101010101 r9 0x8080808080808080 r10 0x28996675b0b92754 r11 0xc82e08a2f73d05d4 r12 0xffffffff828eba00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff82032a28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021135690 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=48172 stat=onproc flags process=14000 proc=200 pri=86, usrpri=85, nice=20 forw=0xffffffffffffffff, list=0xffff8000210f8d20,0xffff8000210f97b0 process=0xffff8000ffffd0a0 user=0xffff800021130000, vmspace=0xffffffff82b6b000 estcpu=35, cpticks=4, pctcpu=11.98 user=0, sys=4, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95475 460616 33844 0 2 0x482 syz-executor.0 2129 492454 33844 0 2 0x482 syz-executor.2 23025 347052 33844 0 2 0x482 syz-executor.3 38524 403649 1 0 3 0x100083 ttyin getty 57692 274431 33844 0 3 0x82 wait syz-executor.5 79124 143740 33844 0 3 0x82 wait syz-executor.4 14710 264488 33844 0 2 0x482 syz-executor.7 97943 197656 0 0 3 0x14280 nfsidl nfsio 69852 79925 0 0 3 0x14280 nfsidl nfsio 96321 416032 0 0 3 0x14280 nfsidl nfsio 43513 340683 0 0 3 0x14280 nfsidl nfsio 35494 45941 0 0 3 0x14280 nfsidl nfsio 74465 186269 0 0 3 0x14280 nfsidl nfsio 33802 5161 0 0 3 0x14280 nfsidl nfsio 82965 270209 0 0 3 0x14280 nfsidl nfsio 83939 55077 0 0 3 0x14280 nfsidl nfsio 51684 475511 0 0 3 0x14280 nfsidl nfsio 40926 448934 0 0 3 0x14280 nfsidl nfsio 3696 52147 0 0 3 0x14280 nfsidl nfsio 81547 41326 0 0 3 0x14280 nfsidl nfsio 52200 26805 0 0 3 0x14280 nfsidl nfsio 1109 227583 0 0 3 0x14280 nfsidl nfsio 95040 508780 0 0 3 0x14280 nfsidl nfsio 9601 458055 0 0 3 0x14280 nfsidl nfsio 47957 47951 0 0 3 0x14280 nfsidl nfsio 85636 489302 0 0 3 0x14280 nfsidl nfsio 23400 239092 0 0 3 0x14280 nfsidl nfsio 77482 377674 0 0 3 0x14200 bored sosplice 33844 466106 94037 0 3 0x82 thrsleep syz-fuzzer 33844 74631 94037 0 2 0x4000482 syz-fuzzer 33844 29013 94037 0 3 0x4000082 kqread syz-fuzzer 33844 410544 94037 0 3 0x4000082 thrsleep syz-fuzzer 33844 417608 94037 0 3 0x4000082 thrsleep syz-fuzzer 33844 379192 94037 0 3 0x4000082 wait syz-fuzzer 33844 401649 94037 0 3 0x4000082 thrsleep syz-fuzzer 33844 135844 94037 0 3 0x4000082 thrsleep syz-fuzzer 33844 426105 94037 0 3 0x4000082 thrsleep syz-fuzzer 94037 106014 28286 0 3 0x10008a sigsusp ksh 28286 69636 39997 0 3 0x9a kqread sshd 39997 360340 1 0 3 0x88 kqread sshd 74071 392920 4289 74 3 0x1100092 bpf pflogd 4289 379060 1 0 3 0x80 netio pflogd 20219 412026 47505 73 2 0x1100010 syslogd 47505 513082 1 0 3 0x100082 netio syslogd 39066 46560 1 0 3 0x100080 kqread resolvd 5490 160891 62864 77 3 0x100092 kqread dhcpleased 32747 423787 62864 77 3 0x100092 kqread dhcpleased 62864 343283 1 0 3 0x80 kqread dhcpleased 51669 401962 0 0 3 0x14200 bored smr 252 131509 0 0 2 0x14200 zerothread 30763 348911 0 0 3 0x14200 aiodoned aiodoned 59903 506944 0 0 3 0x14200 syncer update 19007 397543 0 0 3 0x14200 cleaner cleaner *18234 48172 0 0 7 0x14200 reaper 47979 436213 0 0 3 0x14200 pgdaemon pagedaemon 24367 342291 0 0 3 0x14200 bored viomb 93791 417086 0 0 3 0x40014200 acpi0 acpi0 25364 263873 0 0 7 0x40014200 idle1 99664 465883 0 0 3 0x14200 bored softnet 69141 440395 0 0 3 0x14200 bored systqmp 7836 96579 0 0 3 0x14200 bored systq 15899 68174 0 0 2 0x40014200 softclock 16723 214889 0 0 3 0x40014200 idle0 1 449505 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829c1218) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x243 sys/uvm/uvm_fault.c:1667 #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:3685 #7 reaper+0x18b sys/kern/kern_exit.c:457 #8 proc_trampoline+0x1c Process 20219 (syslogd) thread 0xffff8000ffff6d30 (412026) exclusive rrwlock inode r = 0 (0xfffffd806e736810) #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 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2924 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 18234 (reaper) thread 0xffff8000210f9260 (48172) exclusive rwlock uobjlk r = 0 (0xfffffd806801ce18) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1655 #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:3685 #6 reaper+0x18b sys/kern/kern_exit.c:457 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82aa8820) #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:3685 #4 reaper+0x18b sys/kern/kern_exit.c:457 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829c1218) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x243 sys/uvm/uvm_fault.c:1667 #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:3685 #7 reaper+0x18b sys/kern/kern_exit.c:457 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 6513K 10606K 78643K 45983 0 pcb 13 24K 28K 78643K 3630 0 rtable 186 16K 20K 78643K 5784 0 ifaddr 85 25K 31K 78643K 3154 0 sysctl 2 0K 2K 78643K 6 0 counters 54 35K 36K 78643K 598 0 ioctlops 0 0K 4K 78643K 9973 0 iov 0 0K 40K 78643K 2622 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1520 95K 96K 78643K 13063 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 205 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2530 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 8 25K 89K 78643K 23973 0 sigio 0 0K 0K 78643K 223 0 proc 72 87K 123K 78643K 3662 0 subproc 78 4K 6K 78643K 1037 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1195 0 in_multi 73 4K 7K 78643K 1773 0 ether_multi 1 0K 0K 78643K 311 0 mrt 1 0K 0K 78643K 102 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 4908 0 pfkey data 0 0K 1K 78643K 14 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 759 1698K 1703K 78643K 295192 0 UVM aobj 131 8K 8K 78643K 139 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1143 0 NDP 12 0K 2K 78643K 485 0 temp 553 5555K 8811K 78643K 255057 0 kqueue 12 18K 28K 78643K 1216 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 1516 0 1513 23 22 1 3 0 8 0 rtentry 112 1309 0 1236 4 0 4 4 0 8 0 unpcb 136 19479 0 19464 198 197 1 9 0 8 0 syncache 296 120 0 120 7 7 0 1 0 8 0 tcpqe 32 7 0 7 2 2 0 1 0 8 0 tcpcb 736 9570 0 9566 301 300 1 20 0 8 0 arp 120 194 0 180 1 0 1 1 0 8 0 inpcb 304 31813 0 31806 365 363 2 22 0 8 1 rttmr 72 26 0 26 7 7 0 1 0 8 0 nd6 48 314 0 297 1 0 1 1 0 8 0 pkpcb 40 133 0 133 15 15 0 1 0 8 0 kcovpl 48 79 0 73 1 0 1 1 0 8 0 ppxss 1248 88 0 88 17 17 0 1 0 8 0 pfstscr 40 40 0 40 7 7 0 1 0 8 0 pffrag 232 93 0 92 12 11 1 1 0 482 0 pffrnode 88 91 0 90 12 11 1 1 0 8 0 pffrent 40 405 0 404 12 11 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 809 0 804 14 13 1 1 0 8 0 pftag 88 23 0 10 1 0 1 1 0 8 0 pfqueue 264 15 0 15 5 5 0 1 0 8 0 pfstitem 24 44 0 42 1 0 1 1 0 8 0 pfstkey 112 360 0 358 1 0 1 1 0 8 0 pfstate 320 193 0 191 3 2 1 3 0 8 0 pfrule 1360 3118 0 3116 56 55 1 51 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 5806 0 5456 55 27 28 30 0 8 0 art_table 32 5808 0 5457 4 0 4 4 0 8 0 art_node 16 1230 0 1164 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 2521 0 2511 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 32183 0 30652 97 0 97 97 0 8 0 ffsino 272 32183 0 30652 103 0 103 103 0 8 0 nchpl 144 69138 0 67513 63 0 63 63 0 8 0 uvmvnodes 80 8014 0 0 164 0 164 164 0 8 0 vnodes 224 8014 0 0 472 0 472 472 0 8 0 namei 1024 245541 0 245541 16 15 1 2 0 8 1 percpumem 16 311 0 272 1 0 1 1 0 8 0 vcpupl 2048 315 0 0 40 0 40 40 0 8 0 vmpool 560 378 0 63 23 0 23 23 0 8 0 pfiaddrpl 120 230 0 228 13 12 1 1 0 8 0 scsiplug 72 10 0 10 3 3 0 1 0 8 0 scxspl 216 204607 0 204607 31 30 1 8 0 8 1 plimitpl 152 3014 0 2999 1 0 1 1 0 8 0 sigapl 424 24176 0 24112 8 0 8 8 0 8 0 futexpl 64 243738 0 243738 11 10 1 1 0 8 1 knotepl 120 622 0 0 11 1 10 11 0 8 0 kqueuepl 216 4976 0 4968 107 106 1 8 0 8 0 pipepl 336 5153 0 5129 124 121 3 8 0 8 0 fdescpl 496 24119 0 24098 7 3 4 5 0 8 0 filepl 152 192499 0 192298 286 276 10 22 0 8 0 lockfpl 104 6886 0 6884 22 21 1 4 0 8 0 lockfspl 48 1820 0 1818 2 1 1 2 0 8 0 sessionpl 144 99 0 83 1 0 1 1 0 8 0 pgrppl 48 1805 0 1788 1 0 1 1 0 8 0 ucredpl 96 18139 0 18120 1 0 1 1 0 8 0 zombiepl 144 24120 0 24112 1 0 1 1 0 8 0 processpl 1064 24176 0 24112 5 0 5 5 0 8 0 procpl 672 61839 0 61761 34 26 8 9 0 8 0 srpgc 96 78 0 78 19 18 1 1 0 8 1 sosppl 168 111 0 111 20 20 0 1 0 8 0 sockpl 480 53122 0 53097 1136 1128 8 37 0 8 4 mcl64k 65536 26 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 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 459 0 0 22 3 19 20 0 8 0 mtagpl 96 1159 0 0 15 1 14 15 0 8 0 mbufpl 256 9008 0 0 537 0 537 537 0 8 0 bufpl 288 44835 0 36737 579 0 579 579 0 8 0 anonpl 24 6679713 0 6657984 425 290 135 203 0 186 0 amapchunkpl 152 723705 0 722367 223 171 52 68 0 158 0 amappl16 200 58993 0 58306 210 172 38 50 0 8 1 amappl15 192 4190 0 4183 1 0 1 1 0 8 0 amappl14 184 3042 0 3036 1 0 1 1 0 8 0 amappl13 176 3991 0 3983 1 0 1 1 0 8 0 amappl12 168 2770 0 2768 2 1 1 1 0 8 0 amappl11 160 5517 0 5498 1 0 1 1 0 8 0 amappl10 152 2510 0 2499 1 0 1 1 0 8 0 amappl9 144 2333 0 2328 1 0 1 1 0 8 0 amappl8 136 4575 0 4393 7 0 7 7 0 8 0 amappl7 128 2511 0 2499 1 0 1 1 0 8 0 amappl6 120 2306 0 2270 5 3 2 2 0 8 0 amappl5 112 20321 0 20300 1 0 1 1 0 8 0 amappl4 104 12164 0 12124 2 0 2 2 0 8 0 amappl3 96 6531 0 6512 1 0 1 1 0 8 0 amappl2 88 6032 0 5969 3 1 2 3 0 8 0 amappl1 80 425554 0 424949 22 8 14 19 0 8 0 amappl 88 292789 0 292390 12 2 10 10 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 24497 0 24154 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 24497 0 24154 3 0 3 3 0 8 0 vmmpekpl 168 162856 0 162764 5 0 5 5 0 8 0 vmmpepl 168 2173463 0 2169919 581 387 194 194 0 357 25 vmsppl 368 24496 0 24153 35 3 32 32 0 8 0 rwobjpl 56 508452 0 498363 167 24 143 143 0 8 0 pdppl 4096 49001 0 48621 1375 995 380 384 0 8 0 pvpl 32 11376446 0 11352698 822 575 247 345 0 265 5 pmappl 248 24496 0 24153 22 0 22 22 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3360 0 1523 53 0 53 53 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:440 panic(ffffffff82573ee9) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825ebcc0,ffffffff8256a418,4fb,ffffffff825a04dc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007162100) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8055b2cbb0,30f554ed000,30f556ec000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1668 uvm_unmap_kill_entry_withlock(fffffd8055b2cbb0,fffffd806a8a9aa8,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8055b2cbb0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8055b2cbb0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9260) at reaper+0x18b sys/kern/kern_exit.c:457 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