panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1252 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 54250 86792 0 0x2 0 0 syz-fuzzer *126685 64090 0 0x14000 0x200 1K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259e677) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8261552b,ffffffff8258bb1b,4e4,ffffffff825c23bc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e6ec00) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1252 uvm_fault_unwire_locked(fffffd807e25fcf0,73243d29000,73243f28000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807e25fcf0,fffffd807e50f778,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807e25fcf0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133268) 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{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 1252 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259e677) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8261552b,ffffffff8258bb1b,4e4,ffffffff825c23bc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e6ec00) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1252 uvm_fault_unwire_locked(fffffd807e25fcf0,73243d29000,73243f28000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807e25fcf0,fffffd807e50f778,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807e25fcf0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133268) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021139240 rbx 0xffff800020cd9c5f rdx 0 rcx 0 rax 0xffff800021133268 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4c5287a16d768046 r11 0x208581438294e9cf r12 0xffff800020cd9a60 r13 0 r14 0 r15 0x1 rip 0xffffffff8209a0c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021139230 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=126685 stat=onproc flags process=14000 proc=200 pri=79, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211337a8,0xffff800021132fd8 process=0xffff8000ffffedb8 user=0xffff800021134000, vmspace=0xffffffff829fe4b8 estcpu=36, cpticks=112, pctcpu=13.69 user=0, sys=112, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6118 338329 86792 0 2 0x482 syz-executor.1 20853 298197 86792 0 2 0x482 syz-executor.7 85965 403963 86792 0 2 0x482 syz-executor.5 78325 478626 86792 0 2 0x482 syz-executor.4 67074 358417 0 0 3 0x14280 nfsidl nfsio 94088 443690 0 0 3 0x14280 nfsidl nfsio 77559 309081 0 0 3 0x14280 nfsidl nfsio 65427 309682 0 0 3 0x14280 nfsidl nfsio 93977 270491 0 0 3 0x14280 nfsidl nfsio 40290 431096 0 0 3 0x14280 nfsidl nfsio 77820 16344 0 0 3 0x14280 nfsidl nfsio 95562 481972 0 0 3 0x14280 nfsidl nfsio 86955 184386 0 0 3 0x14280 nfsidl nfsio 94886 103547 0 0 3 0x14280 nfsidl nfsio 54153 371026 0 0 3 0x14280 nfsidl nfsio 66268 510686 0 0 3 0x14280 nfsidl nfsio 67565 369637 0 0 3 0x14280 nfsidl nfsio 19808 229112 0 0 3 0x14280 nfsidl nfsio 4681 344493 0 0 3 0x14280 nfsidl nfsio 16369 523367 0 0 3 0x14280 nfsidl nfsio 1162 259440 0 0 3 0x14280 nfsidl nfsio 24033 255089 0 0 3 0x14280 nfsidl nfsio 89437 395677 0 0 3 0x14280 nfsidl nfsio 80150 191973 0 0 3 0x14280 nfsidl nfsio 8677 401871 0 0 3 0x14200 bored sosplice 25917 76832 86792 0 2 0x482 syz-executor.6 87160 144337 86792 0 3 0x82 wait syz-executor.2 63390 393186 86792 0 2 0x482 syz-executor.0 86792 54250 79724 0 7 0x2 syz-fuzzer 86792 316819 79724 0 2 0x4000482 syz-fuzzer 86792 310928 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 160976 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 144623 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 232492 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 300668 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 524100 79724 0 3 0x4000082 thrsleep syz-fuzzer 86792 77671 79724 0 3 0x4000082 thrsleep syz-fuzzer 79724 17531 31258 0 3 0x10008a sigsusp ksh 31258 304767 819 0 3 0x9a kqread sshd 1367 121070 1 0 3 0x100083 ttyin getty 819 182681 1 0 3 0x88 kqread sshd 46614 421103 41929 74 3 0x1100092 bpf pflogd 41929 303708 1 0 3 0x80 netio pflogd 40342 351668 70044 73 2 0x1100010 syslogd 70044 436229 1 0 3 0x100082 netio syslogd 52283 511485 1 0 3 0x100080 kqread resolvd 80754 243434 31975 77 3 0x100092 kqread dhcpleased 43883 201627 31975 77 3 0x100092 kqread dhcpleased 31975 383908 1 0 3 0x80 kqread dhcpleased 12261 274423 0 0 3 0x14200 bored smr 62020 47638 0 0 2 0x14200 zerothread 2825 272791 0 0 3 0x14200 aiodoned aiodoned 77487 428607 0 0 3 0x14200 syncer update 86098 176315 0 0 3 0x14200 cleaner cleaner *64090 126685 0 0 7 0x14200 reaper 689 98731 0 0 3 0x14200 pgdaemon pagedaemon 68219 49556 0 0 3 0x14200 bored viomb 70676 426090 0 0 3 0x40014200 acpi0 acpi0 82812 293218 0 0 3 0x40014200 idle1 25298 138187 0 0 3 0x14200 bored softnet 75735 403197 0 0 3 0x14200 bored softnet 60175 393773 0 0 3 0x14200 bored softnet 89137 85221 0 0 3 0x14200 bored softnet 35090 116569 0 0 3 0x14200 bored systqmp 61150 319966 0 0 3 0x14200 bored systq 16768 431215 0 0 3 0x40014200 bored softclock 9014 94582 0 0 3 0x40014200 idle0 1 288383 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 (0xffffffff829df3c8) #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 40342 (syslogd) thread 0xffff8000ffff7270 (351668) exclusive rrwlock inode r = 0 (0xfffffd806e7da2c0) #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:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2939 #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 64090 (reaper) thread 0xffff800021133268 (126685) exclusive rwlock uobjlk r = 0 (0xfffffd8064092e10) #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 (0xffffffff829e1078) #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 (0xffffffff829df3c8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 6510K 7420K 78643K 37683 0 pcb 13 16K 18K 78643K 411 0 rtable 193 15K 17K 78643K 1687 0 ifaddr 93 20K 23K 78643K 2101 0 counters 54 35K 35K 78643K 180 0 ioctlops 0 0K 8K 78643K 5247 0 iov 0 0K 24K 78643K 383 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1530 96K 96K 78643K 7883 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 44 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 869 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 9 29K 93K 78643K 7326 0 sigio 0 0K 0K 78643K 129 0 proc 72 91K 115K 78643K 864 0 subproc 91 5K 6K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 982 0 in_multi 72 4K 7K 78643K 240 0 ether_multi 1 0K 0K 78643K 20 0 mrt 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 1430 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 357 291K 305K 78643K 44149 0 UVM aobj 128 3K 3K 78643K 133 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 139 0 NDP 13 0K 2K 78643K 110 0 temp 142 4752K 5784K 78643K 41947 0 kqueue 12 18K 24K 78643K 400 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 120 307 0 304 5 4 1 3 0 8 0 rtentry 112 249 0 175 4 0 4 4 0 8 0 unpcb 136 2331 0 2316 36 30 6 6 0 8 5 syncache 296 23 0 23 7 7 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 243 0 243 6 6 0 2 0 8 0 tcpcb 736 2465 0 2461 89 82 7 14 0 8 6 arp 120 37 0 26 1 0 1 1 0 8 0 inpcb 312 5167 0 5160 98 92 6 16 0 8 5 nd6 48 53 0 34 1 0 1 1 0 8 0 pkpcb 40 36 0 36 1 1 0 1 0 8 0 kcovpl 48 15 0 8 1 0 1 1 0 8 0 ppxss 1248 15 0 15 5 5 0 1 0 8 0 pfstscr 40 12 0 12 3 3 0 1 0 8 0 pffrag 232 9 0 9 4 4 0 1 0 482 0 pffrnode 88 9 0 9 4 4 0 1 0 8 0 pffrent 40 27 0 27 5 5 0 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 454 0 444 5 4 1 2 0 8 0 pftag 88 8 0 2 1 0 1 1 0 8 0 pfstitem 24 31 0 29 1 0 1 1 0 8 0 pfstkey 112 39 0 37 1 0 1 1 0 8 0 pfstate 336 33 0 31 3 2 1 3 0 8 0 pfsrctr 152 66 0 63 1 0 1 1 0 8 0 pfrule 1360 1443 0 1420 8 6 2 5 0 8 0 rttmr 64 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 961 0 564 35 7 28 30 0 8 0 art_table 32 962 0 564 4 0 4 4 0 8 0 art_node 16 240 0 176 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 12 1 1 0 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 867 0 857 1 0 1 1 0 8 0 shmpl 112 130 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10304 0 8853 92 0 92 92 0 8 0 ffsino 272 10304 0 8853 98 0 98 98 0 8 0 nchpl 144 21494 0 19860 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 68242 0 68242 5 4 1 2 0 8 1 percpumem 16 102 0 63 1 0 1 1 0 8 0 vcpupl 2048 15 0 1 2 0 2 2 0 8 0 vmpool 560 44 0 30 2 0 2 2 0 8 0 pfiaddrpl 120 535 0 523 3 2 1 1 0 8 0 kstatmem 264 152 0 126 2 0 2 2 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 59324 0 59324 16 15 1 8 0 8 1 plimitpl 152 649 0 633 1 0 1 1 0 8 0 sigapl 424 7640 0 7572 9 1 8 8 0 8 0 futexpl 64 67850 0 67850 3 2 1 1 0 8 1 knotepl 120 344 0 0 7 0 7 7 0 8 0 kqueuepl 216 1786 0 1778 30 29 1 5 0 8 0 pipepl 336 1038 0 1013 34 31 3 8 0 8 0 fdescpl 496 7600 0 7578 5 1 4 5 0 8 0 filepl 152 40913 0 40695 95 78 17 19 0 8 7 lockfpl 104 8858 0 8856 17 16 1 3 0 8 0 lockfspl 48 4059 0 4057 2 1 1 2 0 8 0 sessionpl 144 31 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 96 7209 0 7195 1 0 1 1 0 8 0 zombiepl 144 7580 0 7572 2 1 1 1 0 8 0 processpl 1064 7640 0 7572 5 0 5 5 0 8 0 procpl 672 21144 0 21054 19 11 8 10 0 8 0 srpgc 96 14 0 14 5 5 0 1 0 8 0 sosppl 168 14 0 14 5 5 0 1 0 8 0 sockpl 480 7841 0 7816 230 202 28 28 0 8 24 mcl64k 65536 25 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 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 4 1 3 3 0 8 0 mcl4k 4096 28 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 332 0 0 33 3 30 33 0 8 0 mtagpl 96 1498 0 0 37 0 37 37 0 8 0 mbufpl 256 1850 0 0 115 0 115 115 0 8 0 bufpl 288 13087 0 6753 453 0 453 453 0 8 0 anonpl 24 1417729 0 1397245 206 71 135 135 0 186 0 amapchunkpl 152 126061 0 125089 72 33 39 39 0 158 0 amappl16 200 18943 0 18296 87 52 35 47 0 8 0 amappl15 192 1429 0 1427 3 2 1 1 0 8 0 amappl14 184 2195 0 2190 1 0 1 1 0 8 0 amappl13 176 723 0 718 1 0 1 1 0 8 0 amappl12 168 2112 0 2108 2 1 1 1 0 8 0 amappl11 160 542 0 521 1 0 1 1 0 8 0 amappl10 152 519 0 510 1 0 1 1 0 8 0 amappl9 144 872 0 869 1 0 1 1 0 8 0 amappl8 136 1265 0 1171 4 0 4 4 0 8 0 amappl7 128 584 0 570 1 0 1 1 0 8 0 amappl6 120 648 0 631 2 1 1 2 0 8 0 amappl5 112 5554 0 5535 1 0 1 1 0 8 0 amappl4 104 2395 0 2366 2 1 1 2 0 8 0 amappl3 96 24831 0 24764 2 0 2 2 0 8 0 amappl2 88 9768 0 9702 4 2 2 3 0 8 0 amappl1 80 182890 0 182170 22 7 15 20 0 8 0 amappl 88 43419 0 43208 5 0 5 5 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 72 132 0 5 3 0 3 3 0 8 0 uaddrrnd 24 7644 0 7601 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7644 0 7601 1 0 1 1 0 8 0 vmmpekpl 168 59786 0 59733 3 0 3 3 0 8 0 vmmpepl 168 731324 0 728418 192 65 127 134 0 357 0 vmsppl 368 7643 0 7600 8 3 5 5 0 8 0 rwobjpl 56 185399 0 177546 117 5 112 113 0 8 0 pdppl 4096 15295 0 15214 325 244 81 84 0 8 0 pvpl 32 2877838 0 2855546 417 169 248 254 0 265 22 pmappl 248 7643 0 7600 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1419 0 478 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82942ff0) 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+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff829e0e70) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e0e70) at __mp_lock+0x133 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(ffffffff829e0e70) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e0e70) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff8000211ce240) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000211ce240) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc030, count: 5 ddb{0}> trace x86_ipi_db(ffffffff82942ff0) 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+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff829e0e70) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e0e70) at __mp_lock+0x133 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(ffffffff829e0e70) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e0e70) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff8000211ce240) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000211ce240) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc030, count: -10 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(ffffffff8259e677) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8261552b,ffffffff8258bb1b,4e4,ffffffff825c23bc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e6ec00) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1252 uvm_fault_unwire_locked(fffffd807e25fcf0,73243d29000,73243f28000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807e25fcf0,fffffd807e50f778,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807e25fcf0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133268) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259e677) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff8261552b,ffffffff8258bb1b,4e4,ffffffff825c23bc) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e6ec00) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1252 uvm_fault_unwire_locked(fffffd807e25fcf0,73243d29000,73243f28000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd807e25fcf0,fffffd807e50f778,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807e25fcf0) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd807e25fcf0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133268) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9