panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1269 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 484238 11159 0 0x2 0x4000000 0 syz-fuzzer * 82777 72018 0 0x14000 0x200 1K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825a77c6) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff8261e5e2,ffffffff8259afda,4f5,ffffffff825d1a3c) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8007b177a0) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd807de3ed10,2bf4b7cb000,2bf4b9ca000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1682 uvm_unmap_kill_entry_withlock(fffffd807de3ed10,fffffd8069fa26c0,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2567 uvmspace_free(fffffd807de3ed10) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 reaper(ffff8000212327e8) at reaper+0x19a sys/kern/kern_exit.c:448 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1269 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825a77c6) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff8261e5e2,ffffffff8259afda,4f5,ffffffff825d1a3c) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8007b177a0) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd807de3ed10,2bf4b7cb000,2bf4b9ca000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1682 uvm_unmap_kill_entry_withlock(fffffd807de3ed10,fffffd8069fa26c0,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2567 uvmspace_free(fffffd807de3ed10) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 reaper(ffff8000212327e8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021239a20 rbx 0xffff800020dd9b8f rdx 0 rcx 0 rax 0xffff8000212327e8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd679a1e22ec33a76 r11 0x61040d40ec28ec2b r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff81b84df8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021239a10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=82777 stat=onproc flags process=14000 proc=200 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021232d28,0xffff800021232018 process=0xffff8000ffffedb8 user=0xffff800021234000, vmspace=0xffffffff82b86ce0 estcpu=36, cpticks=471, pctcpu=6.18 user=0, sys=110, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55138 496787 92545 0 3 0x3000 suspend syz-executor.5 55138 19968 92545 0 2 0x4081000 syz-executor.5 48664 471269 11159 0 3 0x82 wait syz-executor.2 55209 14888 11159 0 3 0x82 wait syz-executor.4 13250 29508 11159 0 3 0x82 wait syz-executor.1 92545 25214 11159 0 3 0x82 wait syz-executor.5 2334 50787 11159 0 3 0x82 wait syz-executor.3 70875 176132 0 0 3 0x14280 nfsidl nfsio 40766 178351 0 0 3 0x14280 nfsidl nfsio 42418 469914 0 0 3 0x14280 nfsidl nfsio 60620 286239 0 0 3 0x14280 nfsidl nfsio 85843 494903 0 0 3 0x14280 nfsidl nfsio 20481 35458 0 0 3 0x14280 nfsidl nfsio 28114 85796 0 0 3 0x14280 nfsidl nfsio 74112 267928 0 0 3 0x14280 nfsidl nfsio 74034 310585 0 0 3 0x14280 nfsidl nfsio 72643 135380 0 0 3 0x14280 nfsidl nfsio 27792 326663 0 0 3 0x14280 nfsidl nfsio 47339 374371 0 0 3 0x14280 nfsidl nfsio 18205 452470 0 0 3 0x14280 nfsidl nfsio 36294 283185 0 0 3 0x14280 nfsidl nfsio 9611 25039 0 0 3 0x14280 nfsidl nfsio 73064 422142 0 0 3 0x14280 nfsidl nfsio 28199 474961 0 0 3 0x14280 nfsidl nfsio 40640 230271 0 0 3 0x14280 nfsidl nfsio 18846 474869 0 0 3 0x14280 nfsidl nfsio 217 101254 0 0 3 0x14280 nfsidl nfsio 36097 164033 0 0 3 0x14200 bored sosplice 49165 76333 11159 0 3 0x82 wait syz-executor.6 54666 497866 11159 0 3 0x82 wait syz-executor.0 11159 133883 33171 0 3 0x82 thrsleep syz-fuzzer 11159 461210 33171 0 3 0x4000082 nanoslp syz-fuzzer 11159 52932 33171 0 3 0x4000082 wait syz-fuzzer 11159 311919 33171 0 3 0x4000082 thrsleep syz-fuzzer 11159 443156 33171 0 3 0x4000082 thrsleep syz-fuzzer 11159 283715 33171 0 3 0x4000082 thrsleep syz-fuzzer 11159 83283 33171 0 3 0x4000082 wait syz-fuzzer 11159 270017 33171 0 3 0x4000082 wait syz-fuzzer 11159 365642 33171 0 3 0x4000082 thrsleep syz-fuzzer 11159 255637 33171 0 3 0x4000082 wait syz-fuzzer 11159 484238 33171 0 7 0x4000002 syz-fuzzer 11159 148085 33171 0 2 0x4000002 syz-fuzzer 11159 383288 33171 0 3 0x4000082 wait syz-fuzzer 11159 29474 33171 0 3 0x4000082 wait syz-fuzzer 11159 65720 33171 0 3 0x4000082 wait syz-fuzzer 11159 340359 33171 0 3 0x4000082 thrsleep syz-fuzzer 33171 463457 92049 0 3 0x10008a sigsusp ksh 92049 144292 79079 0 3 0x9a kqread sshd 84644 123679 1 0 3 0x100083 ttyin getty 79079 272531 1 0 3 0x88 kqread sshd 6983 58990 41853 74 3 0x1100092 bpf pflogd 41853 273273 1 0 3 0x80 netio pflogd 93554 350184 54119 73 2 0x1100010 syslogd 54119 336309 1 0 3 0x100082 netio syslogd 79551 77507 1 0 3 0x100080 kqread resolvd 29797 417693 6756 77 3 0x100092 kqread dhcpleased 53881 456110 6756 77 3 0x100092 kqread dhcpleased 6756 239733 1 0 3 0x80 kqread dhcpleased 60718 112424 0 0 2 0x40014200 smr 82296 499760 0 0 2 0x14200 zerothread 92526 372640 0 0 3 0x14200 aiodoned aiodoned 39731 364866 0 0 3 0x14200 syncer update 21832 107107 0 0 3 0x14200 cleaner cleaner *72018 82777 0 0 7 0x14200 reaper 77198 87330 0 0 3 0x14200 pgdaemon pagedaemon 68385 432875 0 0 3 0x14200 bored viomb 49208 451940 0 0 3 0x40014200 acpi0 acpi0 50784 173653 0 0 3 0x40014200 idle1 36747 458182 0 0 3 0x14200 bored softnet 56745 29061 0 0 3 0x14200 bored softnet 6433 102436 0 0 3 0x14200 bored softnet 14250 488494 0 0 3 0x14200 bored softnet 33061 271523 0 0 3 0x14200 bored systqmp 35965 405965 0 0 3 0x14200 bored systq 2234 217893 0 0 3 0x40014200 bored softclock 57159 522812 0 0 3 0x40014200 idle0 1 167593 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829eb6e8) #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:1681 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 #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:2567 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 #7 reaper+0x19a sys/kern/kern_exit.c:448 #8 proc_trampoline+0x1c Process 93554 (syslogd) thread 0xffff8000ffff7cf0 (350184) exclusive rrwlock inode r = 0 (0xfffffd806e7440a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2935 #6 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 72018 (reaper) thread 0xffff8000212327e8 (82777) exclusive rwlock uobjlk r = 0 (0xfffffd806490d400) #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:1669 #3 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 #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:2567 #5 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 #6 reaper+0x19a sys/kern/kern_exit.c:448 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829f0ef0) #0 witness_lock+0x44d #1 uvm_unmap_kill_entry_withlock+0x4c sys/uvm/uvm_map.c:1911 #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:2567 #3 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 #4 reaper+0x19a sys/kern/kern_exit.c:448 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829eb6e8) #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:1681 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 #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:2567 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 #7 reaper+0x19a sys/kern/kern_exit.c:448 #8 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 6538K 6867K 78643K 16314 0 pcb 13 14K 16K 78643K 518 0 rtable 214 17K 21K 78643K 1968 0 ifaddr 105 23K 25K 78643K 626 0 sysctl 3 1K 1K 78643K 3 0 counters 52 35K 36K 78643K 182 0 ioctlops 0 0K 4K 78643K 2786 0 iov 0 0K 24K 78643K 457 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1331 83K 84K 78643K 2900 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 18 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4812 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 93K 78643K 4803 0 sigio 0 0K 0K 78643K 104 0 proc 70 91K 128K 78643K 1055 0 subproc 91 5K 6K 78643K 286 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 273 0 in_multi 77 5K 6K 78643K 348 0 ether_multi 1 0K 0K 78643K 31 0 mrt 1 0K 0K 78643K 14 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 229 1023K 1023K 78643K 229 0 exec 0 0K 1K 78643K 936 0 pfkey data 0 0K 0K 78643K 7 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 8 62K 64K 78643K 10 0 UVM amap 383 290K 290K 78643K 34442 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 117 0 NDP 11 0K 1K 78643K 106 0 temp 125 4734K 5758K 78643K 33939 0 kqueue 12 18K 28K 78643K 611 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 1137 0 1134 10 9 1 3 0 8 0 rtentry 112 306 0 216 4 0 4 4 0 8 0 unpcb 144 3962 0 3947 49 43 6 8 0 8 5 syncache 296 30 0 30 9 9 0 1 0 8 0 tcpqe 32 65 0 65 5 5 0 1 0 8 0 tcpcb 768 881 0 873 38 30 8 12 0 8 6 arp 120 50 0 35 1 0 1 1 0 8 0 inpcb 368 2536 0 2523 39 33 6 10 0 8 4 nd6 48 71 0 53 1 0 1 1 0 8 0 pkpcb 40 39 0 39 2 2 0 1 0 8 0 kcovpl 48 22 0 15 1 0 1 1 0 8 0 mppekey 1024 4 0 4 1 1 0 1 0 8 0 ppxss 1256 34 0 34 6 6 0 1 0 8 0 pppxif 1704 7 0 7 1 1 0 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 7 0 6 1 0 1 1 0 482 0 pffrnode 88 7 0 6 1 0 1 1 0 8 0 pffrent 40 34 0 33 2 1 1 1 0 8 0 pfosfp 40 1432 0 1432 5 5 0 5 0 8 0 pfosfpen 112 1432 0 1432 21 21 0 21 0 8 0 pfrktable 1344 30 0 26 1 0 1 1 0 8 0 pfanchor 1280 137 0 2 12 0 12 12 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 153 0 136 1 0 1 1 0 8 0 pfstkey 120 157 0 140 2 0 2 2 0 8 0 pfstate 336 154 0 137 4 0 4 4 0 8 0 pfrule 1360 504 0 486 3 1 2 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 2 3 1 2 2 0 8 1 art_heap4 256 1307 0 931 35 5 30 30 0 8 2 art_table 32 1310 0 933 4 0 4 4 0 8 0 art_node 16 305 0 224 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 8 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 4810 0 4800 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7249 0 5796 92 0 92 92 0 8 0 ffsino 272 7249 0 5796 98 0 98 98 0 8 0 nchpl 144 13112 0 11477 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 43339 0 43339 4 3 1 2 0 8 1 percpumem 16 103 0 65 1 0 1 1 0 8 0 vcpupl 2048 14 0 0 2 0 2 2 0 8 0 vmpool 568 18 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 8 0 6 1 0 1 1 0 8 0 kstatmem 264 118 0 96 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 42592 0 42592 17 16 1 8 0 8 1 plimitpl 152 330 0 313 1 0 1 1 0 8 0 sigapl 424 5104 0 5036 10 2 8 8 0 8 0 futexpl 64 44305 0 44305 1 0 1 1 0 8 1 knotepl 120 585 0 0 17 0 17 17 0 8 0 kqueuepl 216 1018 0 1010 5 4 1 5 0 8 0 pipepl 320 3080 0 3055 60 57 3 13 0 8 0 fdescpl 496 5066 0 5043 5 1 4 5 0 8 0 filepl 152 30958 0 30739 77 62 15 20 0 8 5 lockfpl 104 539 0 537 1 0 1 1 0 8 0 lockfspl 48 252 0 250 1 0 1 1 0 8 0 sessionpl 144 38 0 21 1 0 1 1 0 8 0 pgrppl 48 130 0 113 1 0 1 1 0 8 0 ucredpl 104 3048 0 3034 1 0 1 1 0 8 0 zombiepl 144 5043 0 5036 2 1 1 1 0 8 0 processpl 1064 5104 0 5036 5 0 5 5 0 8 0 procpl 672 13949 0 13858 14 5 9 10 0 8 1 srpgc 96 18 0 18 4 3 1 1 0 8 1 sosppl 168 32 0 31 6 5 1 1 0 8 0 sockpl 488 7682 0 7653 186 173 13 37 0 8 8 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 19 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 474 0 0 59 0 59 59 0 8 0 mtagpl 96 267 0 0 6 0 6 6 0 8 0 mbufpl 256 1414 0 0 76 0 76 76 0 8 0 bufpl 288 12659 0 6328 453 0 453 453 0 8 0 anonpl 24 992041 0 967220 227 77 150 150 0 186 0 amapchunkpl 152 95454 0 94120 79 27 52 52 0 158 0 amappl16 200 9417 0 8856 83 52 31 43 0 8 0 amappl15 192 11 0 10 1 0 1 1 0 8 0 amappl14 184 176 0 164 2 1 1 2 0 8 0 amappl13 176 2 0 1 1 0 1 1 0 8 0 amappl12 168 577 0 574 1 0 1 1 0 8 0 amappl11 160 46 0 32 1 0 1 1 0 8 0 amappl10 152 38 0 27 1 0 1 1 0 8 0 amappl9 144 991 0 988 1 0 1 1 0 8 0 amappl8 136 319 0 229 4 0 4 4 0 8 0 amappl7 128 69 0 53 1 0 1 1 0 8 0 amappl6 120 442 0 417 2 0 2 2 0 8 0 amappl5 112 150 0 139 1 0 1 1 0 8 0 amappl4 104 712 0 680 2 1 1 2 0 8 0 amappl3 96 14679 0 14611 2 0 2 2 0 8 0 amappl2 88 5766 0 5689 3 1 2 3 0 8 0 amappl1 80 116723 0 115927 26 8 18 22 0 8 1 amappl 88 33933 0 33696 8 2 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 5085 0 5042 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5085 0 5042 1 0 1 1 0 8 0 vmmpekpl 168 51669 0 51605 4 0 4 4 0 8 0 vmmpepl 168 466284 0 463364 196 55 141 141 0 357 9 vmsppl 368 5084 0 5041 5 0 5 5 0 8 0 rwobjpl 56 129487 0 121579 120 7 113 115 0 8 1 pdppl 4096 10177 0 10096 319 238 81 83 0 8 0 pvpl 32 2031740 0 1998222 457 177 280 280 0 265 7 pmappl 248 5084 0 5041 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1217 0 291 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82960ff0) 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(ffffffff829f0ce8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f0ce8) 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 end of kernel end trace frame: 0x286e3beb0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff82960ff0) 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(ffffffff829f0ce8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f0ce8) 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 end of kernel end trace frame: 0x286e3beb0, count: -6 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:437 panic(ffffffff825a77c6) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff8261e5e2,ffffffff8259afda,4f5,ffffffff825d1a3c) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8007b177a0) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd807de3ed10,2bf4b7cb000,2bf4b9ca000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1682 uvm_unmap_kill_entry_withlock(fffffd807de3ed10,fffffd8069fa26c0,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2567 uvmspace_free(fffffd807de3ed10) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 reaper(ffff8000212327e8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825a77c6) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff8261e5e2,ffffffff8259afda,4f5,ffffffff825d1a3c) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8007b177a0) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd807de3ed10,2bf4b7cb000,2bf4b9ca000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1682 uvm_unmap_kill_entry_withlock(fffffd807de3ed10,fffffd8069fa26c0,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1913 uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807de3ed10) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2567 uvmspace_free(fffffd807de3ed10) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3491 reaper(ffff8000212327e8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -9