uvm_fault(0xfffffd800b063988, 0xf, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81ac77d8 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff80003c408580 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81ac77d8 Starting stack trace... panic(ffffffff833d9e93) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4084d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ktrops(ffff8000fffdd798,ffffffffffffffff,0,af82c397,fffffd806c95ede0,fffffd80097fd618) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff8000fffdd798,ffffffffffffffff,0,af82c397,fffffd806c95ede0,fffffd80097fd618) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd806c95ede0,4,af82c397,ffffffff,ffff8000fffdd798) at doktrace+0x560 ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd806c95ede0,4,af82c397,ffffffff,ffff8000fffdd798) at doktrace+0x560 sys/kern/kern_ktrace.c:502 sys_ktrace(ffff8000fffdd798,ffff80003c4088f0,ffff80003c408840) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff80003c4088f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4088f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe9116995530, count: 249 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 90275 66622 0 0x2 0x1 0 syz-executor * 24214 12705 0 0x2 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bd674756860, 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(0xfffffd800b063988, 0xf, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bd674756860, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a354fa0 rbx 0 rdx 0 rcx 0xffff8000fffec2d0 rax 0x2a r8 0xffff80002a354ed0 r9 0x1 r10 0xc279987cf6d93ae8 r11 0x36f0cbc6dcc89c00 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81fe54c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a354f20 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=24214 pid=12705 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffed4f8,0xffff8000fffde2d8 process=0xffff8000fffe84f0 user=0xffff80002a34f000, vmspace=0xfffffd80687bf3f0 estcpu=36, cpticks=56, pctcpu=0.14, user=4, sys=51, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62363 9171 71458 0 2 0 syz-executor 62363 28628 71458 0 3 0x4000000 sbar syz-executor 58214 250491 7758 0 2 0xc80 syz-executor 58214 454606 7758 0 3 0x4000080 ttyout syz-executor 58214 201757 7758 0 3 0x4000080 fsleep syz-executor 58214 370581 7758 0 3 0x4000080 fsleep syz-executor 33986 285004 66622 0 2 0xc80 syz-executor 33986 111404 66622 0 3 0x4000080 kqsel syz-executor 33986 478651 66622 0 3 0x4000080 fsleep syz-executor 76648 287537 18200 0 2 0x2 syz-executor 90387 167918 0 0 3 0x14280 nfsidl nfsio 91233 461280 0 0 3 0x14280 nfsidl nfsio 43167 70559 0 0 3 0x14280 nfsidl nfsio 51351 328181 0 0 3 0x14280 nfsidl nfsio 99736 218936 0 0 3 0x14280 nfsidl nfsio 52289 401072 0 0 3 0x14280 nfsidl nfsio 67461 423047 0 0 3 0x14280 nfsidl nfsio 84975 328241 0 0 3 0x14280 nfsidl nfsio 26681 120875 0 0 3 0x14280 nfsidl nfsio 71518 106632 0 0 3 0x14280 nfsidl nfsio 97447 111931 0 0 3 0x14280 nfsidl nfsio 26674 283718 0 0 3 0x14280 nfsidl nfsio 16525 226463 0 0 3 0x14280 nfsidl nfsio 66842 400897 0 0 3 0x14280 nfsidl nfsio 26836 302169 0 0 3 0x14280 nfsidl nfsio 44389 441872 0 0 3 0x14280 nfsidl nfsio 75915 415518 18200 0 3 0x82 wait syz-executor 71458 510969 18200 0 2 0xc82 syz-executor 66622 90275 18200 0 7 0x3 syz-executor *12705 24214 18200 0 7 0x2 syz-executor 1974 124580 0 0 3 0x14280 nfsidl nfsio 95700 2066 0 0 3 0x14280 nfsidl nfsio 80022 191932 0 0 3 0x14280 nfsidl nfsio 52221 269364 0 0 3 0x14280 nfsidl nfsio 63217 372676 1 0 2 0x100083 getty 7758 124666 18200 0 2 0xc82 syz-executor 46637 171998 18200 0 3 0x82 wait syz-executor 41858 234665 18200 0 3 0x82 wait syz-executor 18200 40496 38428 0 2 0x3 syz-executor 38428 318345 34705 0 3 0x10008a sigsusp ksh 34705 265688 37205 0 3 0x98 kqread sshd-session 37205 146031 34153 0 3 0x92 kqread sshd-session 34153 345377 1 0 3 0x88 kqread sshd 57370 257261 23625 74 3 0x1100092 bpf pflogd 23625 357370 1 0 3 0x80 sbwait pflogd 67505 511237 69671 73 3 0x1100090 kqread syslogd 69671 96141 1 0 3 0x100082 sbwait syslogd 68229 276084 1 0 3 0x100080 kqread resolvd 96888 111584 10253 77 3 0x100092 kqread dhcpleased 48714 432796 10253 77 3 0x100092 kqread dhcpleased 10253 461214 1 0 3 0x80 kqread dhcpleased 97817 322579 0 0 3 0x14200 bored smr 11629 133666 0 0 2 0x14200 zerothread 88364 476187 0 0 3 0x14200 aiodoned aiodoned 79196 29820 0 0 3 0x14200 syncer update 84796 371806 0 0 3 0x14200 cleaner cleaner 99389 340903 0 0 3 0x14200 reaper reaper 48463 41945 0 0 3 0x14200 pgdaemon pagedaemon 58816 334119 0 0 3 0x14200 bored viomb 973 8573 0 0 3 0x40014200 acpi0 acpi0 81291 260442 0 0 3 0x40014200 idle1 93967 342556 0 0 3 0x14200 bored softnet1 35373 421483 0 0 3 0x14200 netlock softnet0 62186 30023 0 0 2 0x40014200 systqmp 39799 126674 0 0 3 0x14200 bored systq 4831 67329 0 0 2 0x14200 softclockmp 53371 68946 0 0 3 0x40014200 tmoslp softclock 60296 307955 0 0 3 0x40014200 idle0 1 1155 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 62363 (syz-executor) thread 0xffff8000fffdd798 (28628) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d1540) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 bwrite+0x2e7 sys/kern/vfs_bio.c:754 #5 ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 #6 ffs_truncate+0xc9b sys/ufs/ffs/ffs_inode.c:-1 #7 ufs_inactive+0x202 sys/ufs/ufs/ufs_inode.c:84 #8 VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 #9 vrele+0x129 sys/kern/vfs_subr.c:837 #10 ktrsettrace+0xe7 sys/kern/kern_ktrace.c:122 #11 ktrops+0x26c sys/kern/kern_ktrace.c:573 #12 doktrace+0x560 ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] #12 doktrace+0x560 sys/kern/kern_ktrace.c:502 #13 sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 #14 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #15 Xsyscall+0x128 Process 76648 (syz-executor) thread 0xffff8000ffffc2a0 (287537) exclusive rwlock vmmaplk r = 0 (0xfffffd800b0634d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5165 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3746 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd80687bfe78) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5165 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3737 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11079 12115K 12365K 166960K 14393 0 pcb 19 16K 24K 166960K 972 0 rtable 241 14K 14K 166960K 1089 0 pf 43 19K 83K 166960K 564 0 ifaddr 41 7K 8K 166960K 214 0 ifgroup 60 2K 3K 166960K 370 0 sysctl 4 1K 9K 166960K 88 0 counters 72 37K 38K 166960K 508 0 ioctlops 0 0K 5K 166960K 3132 0 iov 0 0K 36K 166960K 296 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 90K 166960K 3973 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 241 0 dirhash 12 2K 2K 166960K 60 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 3433 0 sigio 1 0K 0K 166960K 56 0 proc 73 115K 180K 166960K 1067 0 subproc 72 4K 4K 166960K 168 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 341 0 in_multi 84 6K 7K 166960K 315 0 ether_multi 1 0K 0K 166960K 19 0 mrt 2 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 978 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 168K 185K 166960K 32435 0 UVM aobj 133 10K 10K 166960K 137 0 pinsyscall 42 84K 103K 166960K 4874 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 200 0 NDP 13 0K 2K 166960K 158 0 temp 79 8688K 8946K 166960K 132124 0 kqueue 15 22K 32K 166960K 573 0 SYN cache 2 8K 16K 166960K 3 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 120 349 0 346 4 3 1 3 0 8 0 rtentry 176 289 0 201 6 1 5 6 0 8 0 unpcb 144 1569 0 1552 13 9 4 6 0 8 3 syncache 336 10 0 10 5 5 0 1 0 8 0 tcpqe 32 8 0 8 3 3 0 1 0 8 0 tcpcb 736 812 0 807 17 13 4 7 0 8 3 arp 136 48 0 31 1 0 1 1 0 8 0 inpcb 328 3132 0 3121 29 19 10 10 0 8 8 nd6 152 62 0 41 1 0 1 1 0 8 0 pkpcb 40 17 0 17 5 4 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1192 178 0 178 4 3 1 1 0 8 1 pppxif 1504 78 0 78 5 4 1 1 0 8 1 pfstscr 40 20 0 20 2 2 0 1 0 8 0 pffrag 232 29 0 11 2 0 2 2 0 482 0 pffrnode 88 25 0 8 1 0 1 1 0 8 0 pffrent 40 82 0 63 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 54 0 53 1 0 1 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 10 0 3 1 0 1 1 0 8 0 pfstitem 24 80 0 74 1 0 1 1 0 8 0 pfstkey 128 208 0 130 3 0 3 3 0 8 0 pfstate 448 104 0 101 1 0 1 1 0 8 0 pfrule 1360 139 0 52 8 0 8 8 0 8 0 rttmr 136 4 0 4 3 3 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1294 0 907 39 12 27 30 0 8 0 art_table 40 1299 0 907 5 0 5 5 0 8 0 art_node 32 284 0 211 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 236 0 226 1 0 1 1 0 8 0 shmpl 112 130 0 2 4 0 4 4 0 8 0 dirhash 1024 49 0 32 3 0 3 3 0 8 0 dino2pl 256 7306 0 5790 96 0 96 96 0 8 0 ffsino 296 7306 0 5790 119 1 118 118 0 8 0 nchpl 144 11712 0 9982 65 0 65 65 0 8 0 rtmask 32 23 0 23 6 6 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 39652 0 39652 10 9 1 2 0 8 1 percpumem 16 269 0 218 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 848 4 0 2 1 0 1 1 0 8 0 kstatmem 264 242 0 212 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 19 0 19 7 7 0 1 0 8 0 scxspl 216 127872 0 127872 12 11 1 6 1 8 1 plimitpl 152 776 0 758 1 0 1 1 0 8 0 sigapl 424 3755 0 3688 9 1 8 8 0 8 0 knotepl 120 581 0 0 17 0 17 17 0 8 0 kqueuepl 224 1307 0 1295 17 13 4 5 0 8 3 pipepl 344 503 0 476 9 6 3 9 0 8 0 fdescpl 528 3700 0 3669 3 0 3 3 0 8 0 filepl 160 21807 0 21578 35 21 14 18 0 8 1 lockfpl 104 1178 0 1176 2 1 1 2 0 8 0 lockfspl 48 455 0 453 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 136 0 119 1 0 1 1 0 8 0 ucredpl 104 3204 0 3190 1 0 1 1 0 8 0 zombiepl 144 4265 0 4262 2 1 1 1 0 8 0 processpl 1232 3755 0 3688 6 0 6 6 0 8 0 procpl 664 8804 0 8731 9 1 8 8 0 8 0 sosppl 176 17 0 17 6 5 1 1 0 8 1 sockpl 752 5187 0 5155 48 34 14 17 0 8 10 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 75 0 0 7 0 7 7 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 1828 0 0 114 0 114 114 0 8 0 bufpl 280 56556 0 50420 439 0 439 439 0 8 0 anonpl 32 15717 0 0 128 1 127 127 0 246 0 amapchunkpl 152 112122 0 111590 71 37 34 36 0 158 8 amappl16 200 17699 0 17657 121 99 22 40 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 11 0 11 1 1 0 1 0 8 0 amappl13 176 558 0 557 1 0 1 1 0 8 0 amappl12 168 4157 0 4115 4 1 3 3 0 8 0 amappl11 160 24 0 23 2 1 1 1 0 8 0 amappl10 152 51 0 36 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 99 0 96 1 0 1 1 0 8 0 amappl7 128 150 0 149 1 0 1 1 0 8 0 amappl6 120 439 0 425 1 0 1 1 0 8 0 amappl5 112 78 0 67 1 0 1 1 0 8 0 amappl4 104 523 0 493 1 0 1 1 0 8 0 amappl3 96 19709 0 19612 4 1 3 3 0 8 0 amappl2 88 3847 0 3770 2 0 2 2 0 8 0 amappl1 80 25162 0 24571 14 0 14 14 0 8 0 amappl 88 31033 0 30858 5 0 5 5 0 92 0 uvmvnodes 80 193 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 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 72 136 0 4 3 0 3 3 0 8 0 uaddrrnd 24 3700 0 3669 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3700 0 3669 1 0 1 1 0 8 0 vmmpekpl 168 28310 0 28257 3 0 3 3 0 8 0 vmmpepl 168 241250 0 239312 154 44 110 119 0 357 4 vmsppl 488 3699 0 3669 6 1 5 5 0 8 0 rwobjpl 80 65555 0 64270 40 3 37 37 0 8 0 pdppl 4096 7415 0 7344 128 55 73 83 0 8 2 pvpl 32 24240 0 0 196 0 196 196 0 265 0 pmappl 256 3703 0 3671 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 461 0 100 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83829ff0) 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(ffffffff838d0d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff8000fffde2c8,5b,0,ffff80002a35a100) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffde2c8,5b,0,ffff80002a35a100) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a35a1b0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a35a1b0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7692fb044260, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83829ff0) 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(ffffffff838d0d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff8000fffde2c8,5b,0,ffff80002a35a100) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffde2c8,5b,0,ffff80002a35a100) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a35a1b0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a35a1b0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7692fb044260, count: -11 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: 0x7bd674756860, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bd674756860, count: -1