uvm_fault(0xfffffd800de62b90, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff814da100 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c463250 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff814da100 Starting stack trace... panic(ffffffff8333f802) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4631a0) at kerntrap+0x30b sys/arch/amd64/amd64/trap.c:486 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000b58000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a312038) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a312038) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c463350) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80724e6210,81,fffffd80097fb478,ffff80002a312038) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80721ad898,ffff80002a312038) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80721ad898,ffff80002a312038) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80721ad898,ffff80002a312038) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80721ad898,ffff80002a312038) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a312038) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a312038,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a312038,ffff80003c4636c0,ffff80003c463610) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4636c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4636c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72464b984cb0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 289153 93020 0 0 0 0 syz-executor *158424 19132 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e48a0c30c0, count: 14 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800de62b90, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e48a0c30c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002c003910 rbx 0 rdx 0 rcx 0xffff80002a34e560 rax 0x2a r8 0xffff80002c003840 r9 0x1 r10 0xdbf32598425a5bdc r11 0x7e06f77a3affaae8 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81ec94c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002c003890 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=158424 pid=19132 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=0xffff80002a34f750,0xffff80002a3134c8 process=0xffff800039809890 user=0xffff80002bffe000, vmspace=0xfffffd800de62020 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93020 289153 58239 0 7 0 syz-executor 68279 185548 42362 0 2 0 syz-executor 68279 197587 42362 0 2 0x4000000 syz-executor *19132 158424 16114 0 7 0 syz-executor 19132 328810 16114 0 3 0x4000080 fsleep syz-executor 67035 74059 31532 0 3 0x80 nanoslp syz-executor 67035 273155 31532 0 3 0x4000080 kqsel syz-executor 67035 100615 31532 0 3 0x4000000 smrbar syz-executor 95907 516478 1 0 3 0x100083 ttyin getty 25132 273969 0 0 3 0x14200 acct acct 13892 95724 0 0 3 0x14280 nfsidl nfsio 38462 474079 0 0 3 0x14280 nfsidl nfsio 47224 457115 0 0 3 0x14280 nfsidl nfsio 17302 178801 0 0 3 0x14280 nfsidl nfsio 93424 480466 0 0 3 0x14280 nfsidl nfsio 51889 444376 0 0 3 0x14280 nfsidl nfsio 42521 1152 0 0 3 0x14280 nfsidl nfsio 19183 67472 0 0 3 0x14280 nfsidl nfsio 25985 144181 0 0 3 0x14280 nfsidl nfsio 22171 399837 0 0 3 0x14280 nfsidl nfsio 25831 289561 0 0 3 0x14280 nfsidl nfsio 52224 242256 0 0 3 0x14280 nfsidl nfsio 55939 485012 0 0 3 0x14280 nfsidl nfsio 38266 424826 0 0 3 0x14280 nfsidl nfsio 64754 157612 0 0 3 0x14280 nfsidl nfsio 93512 307589 0 0 3 0x14280 nfsidl nfsio 35511 258904 0 0 3 0x14280 nfsidl nfsio 53822 360918 0 0 3 0x14280 nfsidl nfsio 22261 285604 0 0 3 0x14280 nfsidl nfsio 39650 50476 0 0 3 0x14280 nfsidl nfsio 83893 420880 84438 0 3 0x82 nanoslp syz-executor 41625 75023 84438 0 3 0x82 nanoslp syz-executor 75126 446625 84438 0 3 0x82 nanoslp syz-executor 63966 74986 0 0 3 0x14200 bored sosplice 58239 120131 84438 0 3 0x82 nanoslp syz-executor 46688 74697 84438 0 3 0x82 nanoslp syz-executor 16114 60134 84438 0 3 0x82 nanoslp syz-executor 42362 126222 84438 0 3 0x82 nanoslp syz-executor 31532 370057 84438 0 3 0x82 nanoslp syz-executor 84438 482305 67815 0 3 0x82 kqread syz-executor 67815 485760 19826 0 3 0x10008a sigsusp ksh 19826 463132 60339 0 3 0x98 kqread sshd-session 60339 488159 56593 0 3 0x92 kqread sshd-session 56593 391191 1 0 3 0x88 kqread sshd 47994 460608 34479 74 3 0x1100092 bpf pflogd 34479 228016 1 0 3 0x80 sbwait pflogd 35029 352636 45158 73 3 0x1100090 kqread syslogd 45158 251015 1 0 3 0x100082 sbwait syslogd 9843 308171 1 0 3 0x100080 kqread resolvd 85052 447423 64681 77 3 0x100092 kqread dhcpleased 58845 467195 64681 77 3 0x100092 kqread dhcpleased 64681 363163 1 0 3 0x80 kqread dhcpleased 31826 506400 0 0 3 0x14200 bored smr 87352 172800 0 0 3 0x14200 pgzero zerothread 72056 380874 0 0 3 0x14200 aiodoned aiodoned 62615 437350 0 0 3 0x14200 syncer update 67851 408509 0 0 3 0x14200 cleaner cleaner 264 384686 0 0 3 0x14200 reaper reaper 37956 438926 0 0 3 0x14200 pgdaemon pagedaemon 91493 70931 0 0 3 0x14200 bored viomb 10947 56410 0 0 3 0x40014200 acpi0 acpi0 68849 512641 0 0 3 0x40014200 idle1 84176 486856 0 0 3 0x14200 bored softnet7 81219 273966 0 0 3 0x14200 bored softnet6 50247 321505 0 0 3 0x14200 bored softnet5 53539 509086 0 0 3 0x14200 bored softnet4 45050 514319 0 0 3 0x14200 bored softnet3 6831 223241 0 0 3 0x14200 bored softnet2 91359 68882 0 0 3 0x14200 bored softnet1 80578 396068 0 0 3 0x14200 netlock softnet0 8309 179648 0 0 2 0x40014200 systqmp 53066 255654 0 0 3 0x14200 bored systq 23557 294600 0 0 3 0x14200 tmoslp softclockmp 4998 353889 0 0 3 0x40014200 tmoslp softclock 31828 23420 0 0 3 0x40014200 idle0 1 401992 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 67035 (syz-executor) thread 0xffff80002a34efa0 (100615) exclusive rwlock clonelk r = 0 (0xffffffff8380a688) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x5c5 sys/net/if.c:-1 #4 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10259 11193K 11481K 166960K 13158 0 pcb 19 14K 15K 166960K 265 0 rtable 206 10K 11K 166960K 447 0 pf 41 18K 82K 166960K 141 0 ifaddr 45 8K 8K 166960K 103 0 ifgroup 64 2K 2K 166960K 148 0 sysctl 3 1K 9K 166960K 8 0 counters 74 37K 37K 166960K 160 0 ioctlops 0 0K 4K 166960K 1676 0 iov 0 0K 20K 166960K 159 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1432 90K 91K 166960K 2484 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 34 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 1130 0 sigio 1 0K 0K 166960K 24 0 proc 72 115K 147K 166960K 758 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 178 0 in_multi 94 6K 7K 166960K 178 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 535 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 247 160K 172K 166960K 11801 0 UVM aobj 26 6K 6K 166960K 28 0 pinsyscall 43 86K 102K 166960K 2368 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 14 0K 1K 166960K 69 0 temp 80 8684K 8756K 166960K 54596 0 kqueue 14 22K 35K 166960K 211 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 91 0 85 1 0 1 1 0 8 0 rtentry 176 152 0 73 5 0 5 5 0 8 0 unpcb 144 615 0 594 7 5 2 4 0 8 1 syncache 336 11 0 11 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 356 0 350 11 10 1 7 0 8 0 arp 128 17 0 7 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 328 1141 0 1065 17 6 11 11 0 8 4 nd6 144 25 0 9 1 0 1 1 0 8 0 pkpcb 40 11 0 11 1 1 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 37 0 35 2 1 1 1 0 8 0 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 6 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 13 0 3 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 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 67 0 26 1 0 1 1 0 8 0 pfstkey 128 69 0 28 2 0 2 2 0 8 0 pfstate 384 67 0 27 5 0 5 5 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 754 0 358 29 4 25 28 0 8 0 art_table 40 756 0 358 5 0 5 5 0 8 0 art_node 32 151 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 25 0 2 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3402 0 1889 96 0 96 96 0 8 0 ffsino 296 3402 0 1889 118 0 118 118 0 8 0 nchpl 144 4965 0 4410 64 35 29 64 0 8 4 rtmask 32 5 0 5 2 2 0 1 0 8 0 uvmvnodes 80 4208 0 0 86 0 86 86 0 8 0 vnodes 216 4208 0 0 234 0 234 234 0 8 0 namei 1024 17219 0 17219 2 1 1 1 0 8 1 percpumem 16 95 0 43 1 0 1 1 0 8 0 kstatmem 264 96 0 64 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 22464 0 22464 13 10 3 8 1 8 3 plimitpl 152 281 0 263 1 0 1 1 0 8 0 sigapl 424 1470 0 1394 9 0 9 9 0 8 0 knotepl 120 594 0 0 18 0 18 18 0 8 0 kqueuepl 224 407 0 396 7 2 5 5 0 8 4 pipepl 344 249 0 221 3 0 3 3 0 8 0 fdescpl 528 1424 0 1392 3 0 3 3 0 8 0 filepl 160 8506 0 8214 23 8 15 16 0 8 0 lockfpl 104 678 0 676 2 1 1 2 0 8 0 lockfspl 48 266 0 264 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 71 0 54 1 0 1 1 0 8 0 ucredpl 104 1081 0 1066 1 0 1 1 0 8 0 zombiepl 144 1398 0 1394 1 0 1 1 0 8 0 processpl 1248 1470 0 1394 7 0 7 7 0 8 0 procpl 656 3164 0 3084 9 1 8 8 0 8 0 sosppl 168 8 0 8 1 0 1 1 0 8 1 sockpl 752 1880 0 1777 23 8 15 15 0 8 4 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 36 0 0 4 0 4 4 0 8 0 mtagpl 96 98 0 0 3 0 3 3 0 8 0 mbufpl 256 395 0 0 24 0 24 24 0 8 0 bufpl 280 8493 0 2351 439 0 439 439 0 8 0 anonpl 32 9671 0 0 78 0 78 78 0 246 0 amapchunkpl 152 40298 0 39721 44 15 29 29 0 158 2 amappl16 200 4840 0 4770 35 19 16 16 0 8 3 amappl15 192 6 0 6 2 2 0 1 0 8 0 amappl14 184 137 0 125 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2139 0 2108 4 2 2 3 0 8 0 amappl11 160 68 0 54 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 142 0 129 1 0 1 1 0 8 0 amappl6 120 237 0 234 1 0 1 1 0 8 0 amappl5 112 148 0 138 1 0 1 1 0 8 0 amappl4 104 354 0 334 1 0 1 1 0 8 0 amappl3 96 7848 0 7734 5 1 4 4 0 8 0 amappl2 88 778 0 714 2 0 2 2 0 8 0 amappl1 80 14811 0 14205 15 0 15 15 0 8 0 amappl 88 10838 0 10662 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 27 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1424 0 1392 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1424 0 1392 1 0 1 1 0 8 0 vmmpekpl 168 13310 0 13253 4 1 3 3 0 8 0 vmmpepl 168 97303 0 95224 109 7 102 102 0 357 0 vmsppl 488 1423 0 1392 5 0 5 5 0 8 0 rwobjpl 80 31961 0 26740 110 1 109 109 0 8 0 pdppl 4096 2855 0 2784 135 64 71 85 0 8 0 pvpl 32 16818 0 0 136 0 136 136 0 265 0 pmappl 256 1423 0 1392 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 335 0 86 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 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(ffffffff838d4eb8) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:135 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x190 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvm_fault(fffffd800de625d8,48116401000,0,2) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002bff1960,48116401000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 end trace frame: 0xffff80002bff1950, count: 0 ddb{0}> trace x86_ipi_db(ffffffff838b9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 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(ffffffff838d4eb8) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:135 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x190 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d4eb8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvm_fault(fffffd800de625d8,48116401000,0,2) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002bff1960,48116401000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002bff1960) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74f848809830, count: -16 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e48a0c30c0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e48a0c30c0, count: -1