witness: lock_object uninitialized: 0xffff800000ce5028 Starting stack trace... witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x133 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x133 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000ce5018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff80002413b620) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800022289a50,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800022289a50,ffff8000279a6fd0,ffff8000279a7030) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000279a70a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000279a70a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe63c0, count: 249 End of stack trace. Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000ce5018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff80002413b620) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800022289a50,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800022289a50,ffff8000279a6fd0,ffff8000279a7030) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000279a70a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000279a70a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe63c0, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000279a6d70 rbx 0x3 rdx 0 rcx 0 rax 0xffff800022289a50 r8 0xffff8000279a6d10 r9 0x8080808080808080 r10 0xbeaf437ab816eab6 r11 0x592c84849cd4f2aa r12 0xffff800000ce5001 r13 0xffff800000ce5028 r14 0 r15 0 rip 0xffffffff81410c88 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000279a6d60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=271268 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800022289510,0xffffffff8283e338 process=0xffff80002413b620 user=0xffff8000279a2000, vmspace=0xfffffd8066f14750 estcpu=36, cpticks=9, pctcpu=0.0 user=0, sys=8, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35034 409860 86443 0 2 0x2 syz-executor.3 33458 517304 86443 0 2 0x482 syz-executor.0 87483 498473 86443 0 2 0x482 syz-executor.1 97116 226185 86443 0 7 0x2 syz-executor.2 81057 327805 0 0 3 0x14200 bored sosplice 4078 77571 0 0 3 0x14280 nfsidl nfsio 21022 97014 0 0 3 0x14280 nfsidl nfsio 7422 482722 0 0 3 0x14280 nfsidl nfsio 8026 394792 0 0 3 0x14280 nfsidl nfsio 24669 118752 0 0 3 0x14280 nfsidl nfsio 60448 257481 0 0 3 0x14280 nfsidl nfsio 37796 166811 0 0 3 0x14280 nfsidl nfsio 5504 254931 0 0 3 0x14280 nfsidl nfsio 3984 469004 0 0 3 0x14280 nfsidl nfsio 55212 389225 0 0 3 0x14280 nfsidl nfsio 34966 93725 0 0 3 0x14280 nfsidl nfsio 19115 120329 0 0 3 0x14280 nfsidl nfsio 93763 420529 0 0 3 0x14280 nfsidl nfsio 85144 121193 0 0 3 0x14280 nfsidl nfsio 79643 48526 0 0 3 0x14280 nfsidl nfsio 12017 96300 0 0 3 0x14280 nfsidl nfsio 17704 224016 0 0 3 0x14280 nfsidl nfsio 21364 271278 0 0 3 0x14280 nfsidl nfsio 84180 106337 0 0 3 0x14280 nfsidl nfsio 59991 17994 0 0 3 0x14280 nfsidl nfsio 28429 158916 0 0 3 0x14200 acct acct 86443 489763 85886 0 3 0x82 thrsleep syz-fuzzer 86443 217023 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 395601 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 354030 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 400962 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 21604 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 330902 85886 0 3 0x4000082 thrsleep syz-fuzzer 86443 242629 85886 0 3 0x4000082 kqread syz-fuzzer 85886 266107 81073 0 3 0x10008a sigsusp ksh 81073 451525 83023 0 3 0x9a poll sshd 45016 260612 1 0 2 0x100083 getty 83023 216624 1 0 3 0x88 poll sshd 64315 285894 61902 74 3 0x100092 bpf pflogd 61902 137494 1 0 3 0x80 netio pflogd 27632 401749 14766 73 2 0x100090 syslogd 14766 109245 1 0 3 0x100082 netio syslogd 33245 502988 1 0 3 0x100080 kqread resolvd 42126 226316 62209 77 3 0x100092 kqread dhcpleased 85326 505788 62209 77 3 0x100092 kqread dhcpleased 62209 338571 1 0 3 0x80 kqread dhcpleased 66761 423948 0 0 3 0x14200 bored smr 45547 76275 0 0 2 0x14200 zerothread 64105 248885 0 0 3 0x14200 aiodoned aiodoned 69948 84098 0 0 3 0x14200 syncer update 70045 361733 0 0 3 0x14200 cleaner cleaner 41169 492059 0 0 2 0x14200 reaper 66198 399218 0 0 3 0x14200 pgdaemon pagedaemon 47255 260741 0 0 3 0x14200 bored viomb 30911 314520 0 0 3 0x40014200 acpi0 acpi0 68012 6249 0 0 3 0x40014200 idle1 34571 16891 0 0 3 0x14200 bored softnet 79250 52640 0 0 3 0x14200 bored systqmp 82400 295292 0 0 3 0x14200 bored systq 1721 377019 0 0 2 0x40014200 softclock 39518 159505 0 0 3 0x40014200 idle0 1 45821 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 35034 (syz-executor.3) thread 0xffff800022289510 (409860) exclusive rrwlock inode r = 0 (0xfffffd8072ce46f8) #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 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8064d03920) #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 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 97116 (syz-executor.2) thread 0xffff800022288a90 (226185) exclusive rwlock vmmaplk r = 0 (0xfffffd8066f145f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmspace_fork+0x103 sys/uvm/uvm_map.c:4110 #4 process_new+0x181 sys/kern/kern_fork.c:263 #5 fork1+0x30b sys/kern/kern_fork.c:382 #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 exclusive rwlock vmmaplk r = 0 (0xfffffd806ee4be80) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:4101 #4 process_new+0x181 sys/kern/kern_fork.c:263 #5 fork1+0x30b sys/kern/kern_fork.c:382 #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 41169 (reaper) thread 0xffff800021148d20 (492059) exclusive rwlock kmmaplk r = 0 (0xffffffff8298b1a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvm_unmap+0x78 sys/uvm/uvm_map.c:2068 #4 uvm_uarea_free+0x35 sys/uvm/uvm_glue.c:287 #5 reaper+0x158 sys/kern/kern_exit.c:451 #6 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 6480K 7204K 78643K 32186 0 pcb 13 20K 23K 78643K 1844 0 rtable 162 21K 22K 78643K 2946 0 ifaddr 83 23K 25K 78643K 1087 0 sysctl 2 0K 0K 78643K 2 0 counters 46 34K 35K 78643K 360 0 ioctlops 0 0K 4K 78643K 3510 0 iov 0 0K 32K 78643K 1097 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1390 87K 88K 78643K 8402 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 75 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 979 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 10790 0 sigio 0 0K 0K 78643K 189 0 proc 80 111K 136K 78643K 2078 0 subproc 52 3K 3K 78643K 689 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 618 0 in_multi 41 2K 4K 78643K 1145 0 ether_multi 1 0K 0K 78643K 144 0 mrt 1 0K 0K 78643K 24 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 2834 0 pfkey data 0 0K 0K 78643K 1 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 367 462K 469K 78643K 136727 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 567 0 NDP 8 0K 1K 78643K 317 0 temp 115 4235K 8307K 78643K 99431 0 kqueue 10 14K 26K 78643K 390 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 7702 0 7699 62 60 2 5 0 8 1 rtentry 112 761 0 712 3 1 2 3 0 8 0 unpcb 136 5653 0 5638 75 71 4 8 0 8 3 syncache 296 53 0 53 16 16 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 526 0 526 8 8 0 1 0 8 0 tcpcb 736 3240 0 3236 122 118 4 15 0 8 3 arp 120 116 0 107 1 0 1 1 0 8 0 inpcb 304 9469 0 9462 168 164 4 14 0 8 3 rttmr 72 7 0 7 3 3 0 1 0 8 0 nd6 48 217 0 207 1 0 1 1 0 8 0 pkpcb 40 68 0 68 10 10 0 1 0 8 0 kcovpl 48 53 0 49 1 0 1 1 0 8 0 ppxss 1248 57 0 57 10 10 0 1 0 8 0 pfstscr 40 60 0 60 6 6 0 1 0 8 0 pffrag 232 112 0 109 7 6 1 1 0 482 0 pffrnode 88 111 0 108 7 6 1 1 0 8 0 pffrent 40 717 0 714 7 6 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 250 0 233 10 8 2 2 0 8 0 pftag 88 9 0 7 2 1 1 1 0 8 0 pfstitem 24 189 0 187 1 0 1 1 0 8 0 pfstkey 112 286 0 284 2 1 1 2 0 8 0 pfstate 320 234 0 232 6 5 1 4 0 8 0 pfrule 1360 968 0 905 9 3 6 6 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3260 0 3043 32 15 17 21 0 8 0 art_table 32 3261 0 3043 6 3 3 3 0 8 0 art_node 16 760 0 719 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 977 0 967 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 15498 0 14045 92 0 92 92 0 8 0 ffsino 272 15498 0 14045 98 0 98 98 0 8 0 nchpl 144 29541 0 27944 61 0 61 61 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 103355 0 103355 2 1 1 1 0 8 1 percpumem 16 192 0 157 1 0 1 1 0 8 0 vcpupl 2048 28 0 0 4 0 4 4 0 8 0 vmpool 560 97 0 69 2 0 2 2 0 8 0 pfiaddrpl 120 97 0 70 4 3 1 1 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 88494 0 88494 32 31 1 8 0 8 1 plimitpl 152 1385 0 1374 1 0 1 1 0 8 0 sigapl 424 10903 0 10846 7 0 7 7 0 8 0 futexpl 64 83860 0 83860 1 0 1 1 0 8 1 knotepl 112 199 0 0 3 0 3 3 0 8 0 kqueuepl 216 2419 0 2413 54 51 3 5 0 8 2 pipepl 336 2441 0 2425 59 57 2 7 0 8 0 fdescpl 496 10867 0 10847 4 1 3 4 0 8 0 filepl 152 75738 0 75588 164 153 11 21 0 8 5 lockfpl 104 4679 0 4677 10 8 2 3 0 8 1 lockfspl 48 1123 0 1121 1 0 1 1 0 8 0 sessionpl 144 69 0 56 1 0 1 1 0 8 0 pgrppl 48 75 0 62 1 0 1 1 0 8 0 ucredpl 96 9075 0 9060 1 0 1 1 0 8 0 zombiepl 144 13105 0 13103 1 0 1 1 0 8 0 processpl 1064 10903 0 10845 4 0 4 4 0 8 0 procpl 672 30979 0 30913 10 3 7 8 0 8 0 srpgc 96 62 0 62 9 9 0 1 0 8 0 sosppl 168 56 0 56 11 11 0 1 0 8 0 sockpl 480 22971 0 22946 496 485 11 29 0 8 7 mcl64k 65536 37 0 0 4 1 3 3 0 8 0 mcl16k 16384 34 0 0 5 2 3 3 0 8 0 mcl12k 12288 27 0 0 3 1 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 4 1 3 3 0 8 0 mcl4k 4096 25 0 0 4 1 3 3 0 8 0 mcl2k2 2112 17 0 0 2 0 2 2 0 8 0 mcl2k 2048 353 0 0 26 5 21 26 0 8 0 mtagpl 96 742 0 0 18 1 17 18 0 8 0 mbufpl 256 3165 0 0 193 0 193 193 0 8 0 bufpl 288 21684 0 15340 454 0 454 454 0 8 0 anonpl 24 3069919 0 3050484 276 148 128 148 0 186 0 amapchunkpl 152 362511 0 361762 179 121 58 58 0 158 23 amappl16 200 28636 0 27975 147 109 38 47 0 8 2 amappl15 192 753 0 750 3 2 1 1 0 8 0 amappl14 184 2269 0 2268 7 6 1 1 0 8 0 amappl13 176 1173 0 1171 1 0 1 1 0 8 0 amappl12 168 420 0 419 1 0 1 1 0 8 0 amappl11 160 2772 0 2756 1 0 1 1 0 8 0 amappl10 152 1458 0 1450 1 0 1 1 0 8 0 amappl9 144 2286 0 2283 1 0 1 1 0 8 0 amappl8 136 1507 0 1409 4 0 4 4 0 8 0 amappl7 128 419 0 407 1 0 1 1 0 8 0 amappl6 120 2289 0 2265 1 0 1 1 0 8 0 amappl5 112 10257 0 10238 1 0 1 1 0 8 0 amappl4 104 5507 0 5475 1 0 1 1 0 8 0 amappl3 96 1886 0 1869 1 0 1 1 0 8 0 amappl2 88 2254 0 2200 3 1 2 2 0 8 0 amappl1 80 201153 0 200679 13 2 11 13 0 8 0 amappl 88 135371 0 135158 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 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 10964 0 10915 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10964 0 10915 1 0 1 1 0 8 0 vmmpekpl 168 82893 0 82844 3 0 3 3 0 8 0 vmmpepl 168 1010650 0 1008456 440 322 118 130 0 357 8 vmsppl 368 10963 0 10915 5 0 5 5 0 8 0 rwobjpl 56 246738 0 239102 122 12 110 111 0 8 0 pdppl 4096 21936 0 21858 136 54 82 82 0 8 4 pvpl 32 5114267 0 5093789 415 233 182 214 0 265 0 pmappl 248 10963 0 10915 4 0 4 4 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1256 0 260 29 0 29 29 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 witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000ce5028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000ce5018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000ce5000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff80002413b620) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800022289a50,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800022289a50,ffff8000279a6fd0,ffff8000279a7030) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000279a70a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000279a70a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe63c0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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(ffffffff82993700) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82993700) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82993700,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 yield() at yield+0x5a sys/kern/sched_bsd.c:291 pool_get(ffffffff829cccd0,1) at pool_get+0x199 sys/kern/subr_pool.c:591 uvm_mapent_alloc(fffffd8066f145e0,0) at uvm_mapent_alloc+0x2c9 sys/uvm/uvm_map.c:1779 uvm_map_mkentry(fffffd8066f145e0,fffffd80667eb8b8,fffffd80667eb8b8,9d480b79000,1000,0,3783e125fc5a03ee,1000) at uvm_map_mkentry+0x75 sys/uvm/uvm_map.c:1684 uvm_mapent_clone(fffffd8066f145e0,9d480b79000,1000,0,1,7,9825fbef17588d94,fffffd8067cea798,1000,fffffd8066f145e0) at uvm_mapent_clone+0x9b sys/uvm/uvm_map.c:3814 uvm_mapent_forkcopy(1,fffffd8066f145e0,fffffd806ee4be68,fffffd8067cea798,ffff8000234d8840) at uvm_mapent_forkcopy+0x60 sys/uvm/uvm_map.c:3915 uvmspace_fork(ffff8000211f1d28) at uvmspace_fork+0x23d process_new(ffff800022289270,ffff8000211f1d28,1) at process_new+0x181 sys/kern/kern_fork.c:263 fork1(ffff800022288a90,1,ffffffff818deaa0,0,ffff8000234d8a40,0) at fork1+0x30b sys/kern/kern_fork.c:382 syscall(ffff8000234d8ab0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234d8ab0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0d70, count: -17