panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: filepanic: kernel diagnostic assertion "((flags & PGO_LOCKED) != 0 && rw_lock_held(uobj->vmobjlock)) || (flags & PGO_LOCKED) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 954 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *258468 88841 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29 uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953 uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130 uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236 uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7daa2a663590, count: 5 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 *cpu0: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188 cpu1: kernel diagnostic assertion "((flags & PGO_LOCKED) != 0 && rw_lock_held(uobj->vmobjlock)) || (flags & PGO_LOCKED) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 954 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29 uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953 uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130 uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236 uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7daa2a663590, count: -10 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1305f0 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff80002ef83c10 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2753de198c56e9d2 r11 0xe3d8bf72b738d1b r12 0xffff800029b7cbc0 r13 0 r14 0xffffffff834c2bc0 cpu_info_full_primary+0x2bc0 r15 0x1 rip 0xffffffff82500785 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a1305e0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=258468 pid=88841 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002ef82a58,0xffff8000371baa60 process=0xffff8000371e5220 user=0xffff80002a12b000, vmspace=0xfffffd806ce31e18 estcpu=36, cpticks=7, pctcpu=0.0, user=2, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63774 254217 40389 0 2 0 syz-executor 63774 22086 40389 0 3 0x4000080 fsleep syz-executor 72516 114332 13172 0 2 0x10 syz-executor 72516 136061 13172 0 2 0x4000010 syz-executor *88841 258468 41376 0 7 0 syz-executor 88841 441084 41376 0 3 0x4000080 fsleep syz-executor 56476 522819 98918 0 2 0 syz-executor 56476 510700 98918 0 3 0x4000080 fsleep syz-executor 56476 405666 98918 0 3 0x4000080 fsleep syz-executor 86311 449955 45671 0 2 0 syz-executor 86311 445135 45671 0 3 0x4000080 fsleep syz-executor 86311 38267 45671 0 3 0x4000080 kqread syz-executor 86311 286936 45671 0 3 0x4000080 fsleep syz-executor 53078 331733 72074 0 2 0x2 syz-executor 13172 120237 72074 0 3 0x82 nanoslp syz-executor 44852 63890 72074 0 3 0x82 nanoslp syz-executor 11851 400170 0 0 3 0x14200 acct acct 41376 518350 72074 0 3 0x82 nanoslp syz-executor 98918 127930 72074 0 3 0x82 nanoslp syz-executor 40389 225426 72074 0 3 0x82 nanoslp syz-executor 99536 424876 0 0 3 0x14280 nfsidl nfsio 15339 163105 0 0 3 0x14280 nfsidl nfsio 10771 16990 0 0 3 0x14280 nfsidl nfsio 92087 104714 0 0 3 0x14280 nfsidl nfsio 52088 226522 0 0 3 0x14280 nfsidl nfsio 57764 386351 0 0 3 0x14280 nfsidl nfsio 15254 502922 0 0 3 0x14280 nfsidl nfsio 60421 375767 0 0 3 0x14280 nfsidl nfsio 31104 158288 0 0 3 0x14280 nfsidl nfsio 11701 6740 0 0 3 0x14280 nfsidl nfsio 9783 471908 0 0 3 0x14280 nfsidl nfsio 33223 295836 0 0 3 0x14280 nfsidl nfsio 44496 284890 0 0 3 0x14280 nfsidl nfsio 43576 517144 0 0 3 0x14280 nfsidl nfsio 82861 228571 0 0 3 0x14280 nfsidl nfsio 72499 459536 0 0 3 0x14280 nfsidl nfsio 61973 445627 0 0 3 0x14280 nfsidl nfsio 97847 298588 0 0 3 0x14280 nfsidl nfsio 20573 206453 0 0 3 0x14280 nfsidl nfsio 78984 352037 0 0 3 0x14280 nfsidl nfsio 51810 246856 0 0 3 0x14200 bored sosplice 2896 446922 58989 0 3 0x100082 sbwait ndp 58989 208201 1 0 3 0x10008a sigsusp sh 70981 90061 72074 0 3 0x82 wait syz-executor 45671 18086 72074 0 3 0x82 nanoslp syz-executor 72074 52190 23533 0 3 0x82 kqread syz-executor 23533 504595 12573 0 3 0x10008a sigsusp ksh 12573 492181 49795 0 3 0x98 kqread sshd-session 49795 475942 33493 0 3 0x92 kqread sshd-session 12315 434723 1 0 3 0x100083 ttyin getty 33493 321824 1 0 3 0x88 kqread sshd 63062 165774 69106 74 3 0x1100092 bpf pflogd 69106 221397 1 0 3 0x80 sbwait pflogd 65198 411786 65477 73 3 0x1100090 kqread syslogd 65477 196182 1 0 3 0x100082 sbwait syslogd 29604 370128 1 0 3 0x100080 kqread resolvd 61469 167125 6324 77 3 0x100092 kqread dhcpleased 37245 93228 6324 77 3 0x100092 kqread dhcpleased 6324 279190 1 0 3 0x80 kqread dhcpleased 46004 134105 0 0 3 0x14200 bored smr 70263 362910 0 0 3 0x14200 pgzero zerothread 12966 503977 0 0 3 0x14200 aiodoned aiodoned 84496 112284 0 0 3 0x14200 syncer update 27633 522081 0 0 3 0x14200 cleaner cleaner 11695 90398 0 0 2 0x14200 reaper 71083 486527 0 0 3 0x14200 pgdaemon pagedaemon 47148 296142 0 0 3 0x14200 bored viomb 20747 191853 0 0 3 0x40014200 acpi0 acpi0 59576 357255 0 0 3 0x40014200 idle1 78846 21898 0 0 3 0x14200 bored softnet3 1376 236738 0 0 3 0x14200 bored softnet2 52919 511592 0 0 3 0x14200 bored softnet1 31426 166868 0 0 3 0x14200 bored softnet0 63554 437035 0 0 3 0x14200 bored systqmp 27922 327716 0 0 3 0x14200 bored systq 46349 396441 0 0 3 0x14200 tmoslp softclockmp 52092 75429 0 0 3 0x40014200 tmoslp softclock 62683 13825 0 0 3 0x40014200 idle0 1 135300 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 56476 (syz-executor) thread 0xffff800029fd96d0 (510700) Process 11695 (reaper) thread 0xffff800029fd8cb0 (90398) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 11152K 12714K 166960K 20305 0 pcb 17 20K 25K 166960K 1397 0 rtable 125 5K 8K 166960K 961 0 pf 40 18K 26K 166960K 255 0 ifaddr 34 5K 8K 166960K 182 0 ifgroup 64 2K 2K 166960K 291 0 sysctl 4 1K 1K 166960K 15 0 counters 68 36K 37K 166960K 224 0 ioctlops 0 0K 4K 166960K 2197 0 iov 0 0K 24K 166960K 443 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1682 106K 106K 166960K 5982 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 78 0 VM map 2 1K 1K 166960K 2 0 sem 24 11K 11K 166960K 66 0 dirhash 12 2K 3K 166960K 135 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 89K 166960K 5118 0 sigio 0 0K 0K 166960K 358 0 proc 79 127K 128K 166960K 1265 0 subproc 117 7K 7K 166960K 196 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 815 0 in_multi 51 3K 7K 166960K 411 0 ether_multi 1 0K 0K 166960K 50 0 mrt 1 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 1379 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 8 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 285 74K 91K 166960K 49956 0 UVM aobj 50 4K 6K 166960K 60 0 pinsyscall 45 90K 107K 166960K 6429 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 361 0 NDP 14 0K 2K 166960K 133 0 temp 87 6828K 7084K 166960K 185117 0 kqueue 14 20K 32K 166960K 887 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 612 0 608 9 6 3 4 0 8 2 rtentry 112 295 0 246 4 1 3 4 0 8 0 unpcb 144 4343 0 4324 35 31 4 6 0 8 3 syncache 336 13 0 13 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 1862 0 1854 44 37 7 8 0 8 6 arp 120 56 0 48 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 7259 0 7247 93 84 9 21 0 8 7 nd6 136 62 0 52 1 0 1 1 0 8 0 pkpcb 40 92 0 92 16 15 1 1 0 8 1 kcovpl 48 15 0 6 1 0 1 1 0 8 0 ppxss 1168 50 0 50 11 10 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 30 0 26 1 0 1 1 0 482 0 pffrnode 88 27 0 24 1 0 1 1 0 8 0 pffrent 40 112 0 108 1 0 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 pfstitem 24 435 0 315 2 0 2 2 0 8 0 pfstkey 128 437 0 317 7 0 7 7 0 8 0 pfstate 376 435 0 316 20 0 20 20 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 4 0 1 3 0 3 3 0 8 0 art_heap4 256 1349 0 1077 34 16 18 31 0 8 0 art_table 32 1353 0 1078 4 1 3 4 0 8 0 art_node 16 280 0 238 1 0 1 1 0 8 0 sysvmsgpl 40 28 0 24 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 59 0 37 1 0 1 1 0 8 0 shmpl 112 57 0 10 2 0 2 2 0 8 0 dirhash 1024 100 0 83 3 0 3 3 0 8 0 dino2pl 256 10451 0 8926 96 0 96 96 0 8 0 ffsino 272 10451 0 8926 103 0 103 103 0 8 0 nchpl 144 17900 0 16198 64 0 64 64 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 65149 0 65148 7 5 2 2 0 8 1 percpumem 16 126 0 78 1 0 1 1 0 8 0 kstatmem 264 184 0 156 9 6 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 23 0 23 14 13 1 1 0 8 1 scxspl 216 52783 0 52783 25 24 1 8 1 8 1 plimitpl 152 1225 0 1207 1 0 1 1 0 8 0 sigapl 424 5444 0 5371 10 1 9 9 0 8 0 futexpl 64 79121 0 79114 1 0 1 1 0 8 0 knotepl 120 803 0 0 24 0 24 24 0 8 0 kqueuepl 216 1749 0 1739 18 17 1 5 0 8 0 pipepl 320 749 0 717 14 11 3 8 0 8 0 fdescpl 496 5397 0 5365 5 0 5 5 0 8 0 filepl 152 40021 0 39747 72 54 18 22 0 8 5 lockfpl 104 2392 0 2390 5 4 1 2 0 8 0 lockfspl 48 866 0 864 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 316 0 298 1 0 1 1 0 8 0 ucredpl 104 6974 0 6958 1 0 1 1 0 8 0 zombiepl 144 5766 0 5764 4 3 1 1 0 8 0 processpl 1160 5444 0 5371 6 0 6 6 0 8 0 procpl 648 13748 0 13666 10 2 8 8 0 8 0 srpgc 96 20 0 20 7 7 0 1 0 8 0 sosppl 168 37 0 37 13 13 0 1 0 8 0 sockpl 664 12381 0 12346 116 105 11 23 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 22 0 0 3 0 3 3 0 8 0 mcl4k 4096 156 0 0 19 1 18 19 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 47 0 0 5 0 5 5 0 8 0 mtagpl 96 102 0 0 3 0 3 3 0 8 0 mbufpl 256 1322 0 0 77 0 77 77 0 8 0 bufpl 280 15056 0 8882 442 0 442 442 0 8 0 anonpl 24 668109 0 662602 170 114 56 73 0 185 8 amapchunkpl 152 163850 0 163139 96 58 38 38 0 158 8 amappl16 200 16155 0 16116 154 142 12 28 0 8 6 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 152 0 139 1 0 1 1 0 8 0 amappl13 176 12 0 12 2 2 0 1 0 8 0 amappl12 168 6205 0 6171 3 1 2 2 0 8 0 amappl11 160 89 0 75 1 0 1 1 0 8 0 amappl10 152 15 0 15 2 2 0 1 0 8 0 amappl9 144 132 0 132 1 1 0 1 0 8 0 amappl8 136 47 0 44 1 0 1 1 0 8 0 amappl7 128 126 0 112 1 0 1 1 0 8 0 amappl6 120 246 0 243 1 0 1 1 0 8 0 amappl5 112 173 0 160 1 0 1 1 0 8 0 amappl4 104 385 0 361 1 0 1 1 0 8 0 amappl3 96 30422 0 30304 6 2 4 4 0 8 0 amappl2 88 5807 0 5718 3 0 3 3 0 8 0 amappl1 80 25523 0 24920 15 0 15 15 0 8 0 amappl 88 48964 0 48744 7 1 6 6 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma4096 4096 3 0 3 2 2 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 33 0 33 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 258 0 258 5 5 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 59 0 10 1 0 1 1 0 8 0 uaddrrnd 24 5397 0 5364 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5397 0 5364 1 0 1 1 0 8 0 vmmpekpl 168 40696 0 40635 3 0 3 3 0 8 0 vmmpepl 168 330753 0 328698 171 72 99 110 0 357 4 vmsppl 448 5396 0 5364 6 1 5 5 0 8 0 rwobjpl 56 86701 0 79654 112 9 103 106 0 8 0 pdppl 4096 10801 0 10728 171 96 75 83 0 8 2 pvpl 32 20110 0 0 163 1 162 162 0 265 0 pmappl 248 5396 0 5364 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 692 0 260 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834c1ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff835b1128) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835b1128) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(65) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff830956bf) at db_printf+0x9b panic(ffffffff830f6312) at panic+0x103 sys/kern/subr_prf.c:216 __assert(ffffffff830a7cd6,ffffffff8306202e,bc,ffffffff83024a05) at __assert+0x29 unveil_destroy(ffff8000371e68c8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000367b2f78,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 end trace frame: 0xffff80002d572b80, count: 0 ddb{0}> trace x86_ipi_db(ffffffff834c1ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff835b1128) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835b1128) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(65) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff830956bf) at db_printf+0x9b panic(ffffffff830f6312) at panic+0x103 sys/kern/subr_prf.c:216 __assert(ffffffff830a7cd6,ffffffff8306202e,bc,ffffffff83024a05) at __assert+0x29 unveil_destroy(ffff8000371e68c8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000367b2f78,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000367b2f78,ffff80002d572c60,ffff80002d572bb0) at sys_exit+0x1a syscall(ffff80002d572c60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002d572c60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e08f95b4a30, count: -17 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29 uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953 uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130 uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236 uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7daa2a663590, count: 5 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29 uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953 uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130 uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236 uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7daa2a663590, count: -10