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 219053 40939 0 0x2 0x4000000 0 syz-fuzzer *232928 74632 0 0x14000 0x200 1K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8256eb5a) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e7f2d,ffffffff82562cf8,4fb,ffffffff82599013) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007262c40) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8067f7c8a0,477038d4000,47703ad3000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1654 uvm_unmap_kill_entry_withlock(fffffd8067f7c8a0,fffffd807e455d70,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8067f7c8a0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f97a0) at reaper+0x18b sys/kern/kern_exit.c:462 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 1275 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8256eb5a) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e7f2d,ffffffff82562cf8,4fb,ffffffff82599013) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007262c40) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8067f7c8a0,477038d4000,47703ad3000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1654 uvm_unmap_kill_entry_withlock(fffffd8067f7c8a0,fffffd807e455d70,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8067f7c8a0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f97a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021135100 rbx 0xffff800020ce9bff rdx 0 rcx 0 rax 0xffff8000210f97a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe9fbdc8f8a418548 r11 0xe7d74f4c11398aa9 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff8189f228 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211350f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=232928 stat=onproc flags process=14000 proc=200 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000210f9500,0xffff8000210f9cf0 process=0xffff8000ffffd0a0 user=0xffff800021130000, vmspace=0xffffffff82b67ef8 estcpu=36, cpticks=397, pctcpu=15.79 user=0, sys=361, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74014 67367 40939 0 3 0x82 nanoslp syz-executor.3 40141 435810 40939 0 3 0x82 wait syz-executor.0 11057 265682 40939 0 3 0x82 nanoslp syz-executor.1 92508 187793 0 0 3 0x14200 acct acct 17892 283184 0 0 3 0x14280 nfsidl nfsio 40442 72181 0 0 3 0x14280 nfsidl nfsio 17080 408613 0 0 3 0x14280 nfsidl nfsio 85934 48956 0 0 3 0x14280 nfsidl nfsio 45071 346725 0 0 3 0x14280 nfsidl nfsio 70654 90933 0 0 3 0x14280 nfsidl nfsio 47008 51386 0 0 3 0x14280 nfsidl nfsio 76864 199377 0 0 3 0x14280 nfsidl nfsio 24147 114912 0 0 3 0x14280 nfsidl nfsio 68701 108217 0 0 3 0x14280 nfsidl nfsio 81263 202699 0 0 3 0x14280 nfsidl nfsio 65385 14039 0 0 3 0x14280 nfsidl nfsio 70270 374959 0 0 3 0x14280 nfsidl nfsio 45122 69601 0 0 3 0x14280 nfsidl nfsio 70764 229763 0 0 3 0x14280 nfsidl nfsio 38736 271758 0 0 3 0x14280 nfsidl nfsio 12991 256492 0 0 3 0x14280 nfsidl nfsio 62123 353463 0 0 3 0x14280 nfsidl nfsio 46477 478731 0 0 3 0x14280 nfsidl nfsio 13000 504827 0 0 3 0x14280 nfsidl nfsio 24222 251298 40939 0 3 0x82 wait syz-executor.7 83530 107133 40939 0 3 0x82 wait syz-executor.5 35881 200307 40939 0 3 0x82 wait syz-executor.4 53147 502825 40939 0 3 0x82 wait syz-executor.6 68547 471072 0 0 3 0x14200 bored sosplice 40939 85816 55254 0 3 0x82 kqread syz-fuzzer 40939 145197 55254 0 3 0x4000082 nanoslp syz-fuzzer 40939 408892 55254 0 3 0x4000082 thrsleep syz-fuzzer 40939 9277 55254 0 3 0x4000082 thrsleep syz-fuzzer 40939 219053 55254 0 7 0x4000002 syz-fuzzer 40939 475124 55254 0 3 0x4000082 thrsleep syz-fuzzer 40939 466499 55254 0 3 0x4000082 thrsleep syz-fuzzer 40939 149873 55254 0 3 0x4000082 thrsleep syz-fuzzer 40939 374636 55254 0 3 0x4000082 thrsleep syz-fuzzer 55254 262134 15289 0 3 0x10008a sigsusp ksh 15289 484845 59105 0 3 0x9a poll sshd 65597 73768 1 0 3 0x100083 ttyin getty 59105 261343 1 0 3 0x88 poll sshd 54793 380362 67578 74 3 0x100092 bpf pflogd 67578 354451 1 0 3 0x80 netio pflogd 68999 33902 84170 73 2 0x100010 syslogd 84170 307892 1 0 3 0x100082 netio syslogd 19042 384204 1 0 3 0x100080 kqread resolvd 53092 175208 49471 77 3 0x100092 kqread dhcpleased 15132 186709 49471 77 3 0x100092 kqread dhcpleased 49471 336825 1 0 3 0x80 kqread dhcpleased 27798 379493 0 0 2 0x14200 smr 44029 347895 0 0 2 0x14200 zerothread 40473 258457 0 0 3 0x14200 aiodoned aiodoned 64188 133090 0 0 3 0x14200 syncer update 97974 240040 0 0 3 0x14200 cleaner cleaner *74632 232928 0 0 7 0x14200 reaper 10464 212312 0 0 3 0x14200 pgdaemon pagedaemon 33863 128148 0 0 3 0x14200 bored viomb 315 193110 0 0 3 0x40014200 acpi0 acpi0 59118 131440 0 0 3 0x40014200 idle1 12555 311908 0 0 3 0x14200 bored softnet 46769 1810 0 0 3 0x14200 bored systqmp 20338 169840 0 0 3 0x14200 bored systq 10655 333988 0 0 3 0x40014200 bored softclock 16759 114456 0 0 3 0x40014200 idle0 1 358156 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 (0xffffffff82aafee0) #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:1653 #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:462 #8 proc_trampoline+0x1c Process 68999 (syslogd) thread 0xffff8000ffff7a50 (33902) exclusive rrwlock inode r = 0 (0xfffffd806e737810) #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:2923 #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 74632 (reaper) thread 0xffff8000210f97a0 (232928) exclusive rwlock uobjlk r = 0 (0xfffffd8072bf1980) #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:1641 #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:462 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b03f90) #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:462 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82aafee0) #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:1653 #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:462 #8 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10336 6710K 7292K 78643K 39807 0 pcb 13 22K 24K 78643K 1303 0 rtable 222 13K 16K 78643K 2898 0 ifaddr 87 22K 25K 78643K 1271 0 sysctl 2 0K 0K 78643K 4 0 counters 54 35K 36K 78643K 342 0 ioctlops 0 0K 4K 78643K 3097 0 iov 0 0K 16K 78643K 996 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1439 90K 90K 78643K 10037 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 82 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1440 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 85K 78643K 8995 0 sigio 0 0K 0K 78643K 94 0 proc 72 87K 112K 78643K 1547 0 subproc 91 5K 6K 78643K 442 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2707 0 in_multi 76 5K 6K 78643K 770 0 ether_multi 1 0K 0K 78643K 109 0 mrt 1 0K 0K 78643K 34 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 2693 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 464 470K 667K 78643K 117312 0 UVM aobj 131 6K 6K 78643K 143 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 537 0 NDP 11 0K 1K 78643K 258 0 temp 142 4731K 4796K 78643K 63519 0 kqueue 10 14K 22K 78643K 353 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 120 639 0 636 12 11 1 3 0 8 0 rtentry 112 547 0 462 4 0 4 4 0 8 0 unpcb 136 4572 0 4557 57 56 1 10 0 8 0 syncache 296 46 0 46 13 13 0 1 0 8 0 tcpqe 32 776 61 776 2 2 0 1 0 8 0 tcpcb 736 3898 0 3890 125 121 4 16 0 8 2 arp 120 90 0 74 1 0 1 1 0 8 0 inpcb 304 19338 0 19314 131 127 4 17 0 8 0 rttmr 72 7 0 6 2 1 1 1 0 8 0 nd6 48 153 0 132 1 0 1 1 0 8 0 pkpcb 40 19 0 19 4 4 0 1 0 8 0 kcovpl 48 34 0 27 1 0 1 1 0 8 0 ppxss 1248 58 0 58 7 7 0 1 0 8 0 pfstscr 40 33 0 33 6 6 0 1 0 8 0 pffrag 232 34 0 33 2 1 1 1 0 482 0 pffrnode 88 34 0 33 2 1 1 1 0 8 0 pffrent 40 414 0 413 3 2 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 613 0 600 10 8 2 2 0 8 0 pftag 88 7 0 1 1 0 1 1 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 27 0 25 1 0 1 1 0 8 0 pfstkey 112 63 0 61 1 0 1 1 0 8 0 pfstate 320 42 0 40 2 1 1 2 0 8 0 pfrule 1360 406 0 346 11 5 6 6 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2138 0 1720 43 11 32 32 0 8 2 art_table 32 2139 0 1720 5 0 5 5 0 8 0 art_node 16 542 0 466 1 0 1 1 0 8 0 sysvmsgpl 40 34 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 1438 0 1428 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 13156 0 11702 92 0 92 92 0 8 0 ffsino 272 13156 0 11702 98 0 98 98 0 8 0 nchpl 144 24849 0 23231 63 0 63 63 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 91318 0 91318 5 4 1 2 0 8 1 percpumem 16 183 0 144 1 0 1 1 0 8 0 vcpupl 2048 91 0 0 12 0 12 12 0 8 0 vmpool 560 169 0 78 7 0 7 7 0 8 0 pfiaddrpl 120 173 0 161 2 1 1 1 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 70407 0 70407 33 32 1 8 0 8 1 plimitpl 152 1211 0 1196 1 0 1 1 0 8 0 sigapl 424 9270 0 9212 9 1 8 8 0 8 0 futexpl 64 87518 0 87518 2 1 1 1 0 8 1 knotepl 112 143 0 0 3 0 3 3 0 8 0 kqueuepl 216 2212 0 2206 44 43 1 5 0 8 0 pipepl 336 7412 0 7387 103 100 3 9 0 8 0 fdescpl 496 9231 0 9209 6 2 4 5 0 8 0 filepl 152 81680 0 81462 127 114 13 22 0 8 1 lockfpl 104 2686 0 2684 5 4 1 2 0 8 0 lockfspl 48 758 0 756 1 0 1 1 0 8 0 sessionpl 144 50 0 33 1 0 1 1 0 8 0 pgrppl 48 150 0 133 1 0 1 1 0 8 0 ucredpl 96 7045 0 7029 1 0 1 1 0 8 0 zombiepl 144 9212 0 9204 3 2 1 1 0 8 0 processpl 1064 9270 0 9204 5 0 5 5 0 8 0 procpl 672 27514 0 27431 27 19 8 9 0 8 1 srpgc 96 32 0 32 6 6 0 1 0 8 0 sosppl 168 97 0 97 16 16 0 1 0 8 0 sockpl 480 24575 0 24533 412 401 11 47 0 8 4 mcl64k 65536 34 0 0 3 0 3 3 0 8 0 mcl16k 16384 22 0 0 3 1 2 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 5 2 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 309 0 0 22 0 22 22 0 8 0 mtagpl 96 1522 0 0 31 0 31 31 0 8 0 mbufpl 256 3114 0 0 174 1 173 173 0 8 0 bufpl 288 17260 0 10924 453 0 453 453 0 8 0 anonpl 24 2685758 0 2654254 306 109 197 197 0 186 1 amapchunkpl 152 404570 0 402943 759 694 65 669 0 158 0 amappl16 200 24702 0 24023 117 80 37 49 0 8 0 amappl15 192 2988 0 2977 1 0 1 1 0 8 0 amappl14 184 1469 0 1466 1 0 1 1 0 8 0 amappl13 176 983 0 979 1 0 1 1 0 8 0 amappl12 168 1275 0 1272 2 1 1 1 0 8 0 amappl11 160 946 0 930 1 0 1 1 0 8 0 amappl10 152 886 0 877 1 0 1 1 0 8 0 amappl9 144 1060 0 1057 1 0 1 1 0 8 0 amappl8 136 2558 0 2451 4 0 4 4 0 8 0 amappl7 128 1525 0 1511 1 0 1 1 0 8 0 amappl6 120 885 0 854 2 1 1 2 0 8 0 amappl5 112 7269 0 7252 1 0 1 1 0 8 0 amappl4 104 4510 0 4478 2 0 2 2 0 8 0 amappl3 96 2637 0 2623 1 0 1 1 0 8 0 amappl2 88 2038 0 1982 3 1 2 3 0 8 0 amappl1 80 173233 0 172646 22 8 14 19 0 8 0 amappl 88 116126 0 115824 8 0 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 72 142 0 12 3 0 3 3 0 8 0 uaddrrnd 24 9400 0 9280 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9400 0 9280 1 0 1 1 0 8 0 vmmpekpl 168 98519 0 98435 5 0 5 5 0 8 0 vmmpepl 168 857268 0 854190 297 156 141 151 0 357 0 vmsppl 368 9399 0 9279 15 3 12 12 0 8 0 rwobjpl 56 215402 0 207571 126 14 112 115 0 8 0 pdppl 4096 18807 0 18649 545 385 160 160 0 8 2 pvpl 32 4487000 0 4453569 543 212 331 333 0 265 28 pmappl 248 9399 0 9279 9 1 8 8 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1719 0 635 32 0 32 32 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82991ff0) 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(ffffffff82b03d88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b03d88) 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 __mp_lock(ffffffff82b03d88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b03d88) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000211eae10) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000211eae10) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x24c7c2090, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82991ff0) 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(ffffffff82b03d88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b03d88) 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 __mp_lock(ffffffff82b03d88) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b03d88) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000211eae10) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000211eae10) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x24c7c2090, count: -9 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(ffffffff8256eb5a) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e7f2d,ffffffff82562cf8,4fb,ffffffff82599013) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007262c40) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8067f7c8a0,477038d4000,47703ad3000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1654 uvm_unmap_kill_entry_withlock(fffffd8067f7c8a0,fffffd807e455d70,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8067f7c8a0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f97a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8256eb5a) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e7f2d,ffffffff82562cf8,4fb,ffffffff82599013) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007262c40) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1275 uvm_fault_unwire_locked(fffffd8067f7c8a0,477038d4000,47703ad3000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1654 uvm_unmap_kill_entry_withlock(fffffd8067f7c8a0,fffffd807e455d70,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8067f7c8a0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8067f7c8a0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f97a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -9