*cpu0: uvm_fault(0xfffffd806bd723e0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7381a4de3a90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002f3e6d90 rbx 0 rdx 0 rcx 0xffff8000ffff19c0 rax 0x2a r8 0xffff80002f3e6cc0 r9 0x4 r10 0x8c743204a845583e r11 0xe61dab1b0edd4c95 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81fd44c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002f3e6d10 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=100439 pid=81366 tcnt=1 stat=onproc flags process=0 proc=0 runpri=78, usrpri=78, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2ff740,0xffff8000ffff1220 process=0xffff800039003800 user=0xffff80002f3e1000, vmspace=0xfffffd806bd72020 estcpu=28, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71821 267124 87605 0 2 0 syz-executor 71821 16241 87605 0 3 0x4000080 fsleep syz-executor 72348 76496 91588 0 2 0 syz-executor 72348 261121 91588 0 2 0x4000000 syz-executor 72348 230947 91588 0 7 0x4000000 syz-executor *81366 100439 38828 0 7 0 syz-executor 48960 426651 39746 0 3 0x3000 suspend syz-executor 48960 272902 39746 0 2 0x4081000 syz-executor 48960 449880 39746 0 3 0x4081000 inode syz-executor 48960 172051 39746 0 3 0x4081000 inode syz-executor 5691 241091 1 0 3 0x100083 ttyin getty 89038 93905 32694 0 2 0x10000482 syz-executor 30929 425563 44116 0 3 0x82 sbwait sshd-session 62969 269415 0 0 3 0x14200 bored sosplice 10494 300213 32694 0 2 0x10000002 syz-executor 21809 164702 32694 0 2 0x2 syz-executor 87605 276625 32694 0 2 0x482 syz-executor 39746 99169 32694 0 3 0x82 wait syz-executor 38828 452380 32694 0 3 0x82 nanoslp syz-executor 91588 88071 32694 0 3 0x82 nanoslp syz-executor 33775 278601 32694 0 2 0x10000002 syz-executor 32694 359628 8468 0 3 0x82 kqread syz-executor 8468 73354 63402 0 3 0x10008a sigsusp ksh 63402 376592 92401 0 3 0x98 kqread sshd-session 92401 128934 44116 0 3 0x92 kqread sshd-session 44116 281499 1 0 3 0x88 kqread sshd 63807 272335 4791 74 3 0x1100092 bpf pflogd 4791 503348 1 0 3 0x80 sbwait pflogd 31690 392821 94183 73 3 0x1100090 kqread syslogd 94183 329150 1 0 3 0x100082 sbwait syslogd 97242 377928 1 0 3 0x100080 kqread resolvd 73083 120953 38421 77 3 0x100092 kqread dhcpleased 59526 180581 38421 77 3 0x100092 kqread dhcpleased 38421 202264 1 0 3 0x80 kqread dhcpleased 17581 408153 0 0 3 0x14200 bored smr 96461 298086 0 0 2 0x14200 zerothread 16111 280470 0 0 3 0x14200 aiodoned aiodoned 58422 294213 0 0 3 0x14200 syncer update 11144 307355 0 0 3 0x14200 cleaner cleaner 21191 139356 0 0 3 0x14200 reaper reaper 80356 498906 0 0 3 0x14200 pgdaemon pagedaemon 19848 477532 0 0 3 0x14200 bored viomb 77923 397689 0 0 3 0x40014200 acpi0 acpi0 63258 181158 0 0 3 0x40014200 idle1 52062 509382 0 0 3 0x14200 bored softnet3 80300 272306 0 0 3 0x14200 bored softnet2 983 417026 0 0 3 0x14200 bored softnet1 12339 352158 0 0 3 0x14200 bored softnet0 26198 301475 0 0 3 0x14200 bored systqmp 39854 424084 0 0 3 0x14200 bored systq 15220 118796 0 0 3 0x14200 tmoslp softclockmp 86665 95871 0 0 2 0x40014200 softclock 88434 427274 0 0 3 0x40014200 idle0 1 477166 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83914d28) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower+0x224 sys/uvm/uvm_fault.c:-1 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 72348 (syz-executor) thread 0xffff8000ffff0cf0 (230947) exclusive rwlock dtlk r = 0 (0xffffffff837bca88) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:318 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8396cd30) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 81366 (syz-executor) thread 0xffff8000ffff19c0 (100439) exclusive rwlock uobjlk r = 0 (0xfffffd806cf08408) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1173 #3 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bd72120) #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_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1860 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:730 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:666 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83914d28) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower+0x224 sys/uvm/uvm_fault.c:-1 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 48960 (syz-executor) thread 0xffff8000fffe8548 (272902) exclusive rrwlock inode r = 0 (0xfffffd806e6ca9c8) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 48960 (syz-executor) thread 0xffff80002a2fe7e0 (449880) exclusive rrwlock inode r = 0 (0xfffffd806e6ca8a8) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x13f sys/kern/vfs_vnops.c:140 #8 sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 #9 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 21809 (syz-executor) thread 0xffff8000ffffd9a8 (164702) exclusive rrwlock inode r = 0 (0xfffffd8075ce4ad0) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c58ad38) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11097K 11501K 166960K 12771 0 pcb 20 13K 14K 166960K 151 0 rtable 203 7K 8K 166960K 456 0 pf 33 17K 22K 166960K 103 0 ifaddr 39 7K 8K 166960K 82 0 ifgroup 51 2K 2K 166960K 130 0 sysctl 3 1K 1K 166960K 3 0 counters 62 36K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1623 0 iov 0 0K 24K 166960K 41 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1400 88K 89K 166960K 2337 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 10K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 89K 166960K 872 0 sigio 1 0K 0K 166960K 11 0 proc 72 91K 128K 166960K 658 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 133 0 in_multi 88 6K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 6 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 538 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 220 169K 183K 166960K 9465 0 UVM aobj 25 4K 4K 166960K 29 0 pinsyscall 41 82K 103K 166960K 2000 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 32 0 NDP 11 0K 2K 166960K 53 0 temp 75 8692K 8768K 166960K 20007 0 kqueue 13 20K 30K 166960K 148 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 84 0 81 1 0 1 1 0 8 0 rtentry 176 142 0 52 6 0 6 6 0 8 0 unpcb 144 593 0 574 7 3 4 4 0 8 3 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 808 190 0 184 4 2 2 2 0 8 1 arp 128 23 0 8 1 0 1 1 0 8 0 inpcb 384 843 0 830 12 10 2 9 0 8 0 nd6 144 31 0 8 2 0 2 2 0 8 0 pkpcb 40 7 0 7 4 3 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 18 0 18 3 2 1 1 0 8 1 pppxif 1504 7 0 7 2 2 0 1 0 8 0 pffrag 232 9 0 2 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 13 0 6 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 48 0 14 1 0 1 1 0 8 0 pfstkey 128 48 0 14 2 0 2 2 0 8 0 pfstate 384 47 0 14 5 0 5 5 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 575 0 169 29 1 28 29 0 8 0 art_table 32 576 0 169 4 0 4 4 0 8 0 art_node 16 138 0 57 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 27 0 17 1 0 1 1 0 8 0 shmpl 112 26 0 4 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3265 0 1764 95 0 95 95 0 8 0 ffsino 288 3265 0 1764 109 0 109 109 0 8 0 nchpl 144 4488 0 3947 64 39 25 64 0 8 0 uvmvnodes 80 3788 0 0 78 0 78 78 0 8 0 vnodes 216 3788 0 0 211 0 211 211 0 8 0 namei 1024 14471 0 14469 3 2 1 2 0 8 0 percpumem 16 76 0 31 1 0 1 1 0 8 0 kstatmem 264 68 0 46 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 14628 0 14628 11 9 2 8 1 8 2 plimitpl 152 323 0 303 1 0 1 1 0 8 0 sigapl 424 1177 0 1126 7 1 6 7 0 8 0 futexpl 64 12787 0 12786 1 0 1 1 0 8 0 knotepl 120 549 0 0 17 0 17 17 0 8 0 kqueuepl 224 233 0 224 4 2 2 2 0 8 1 pipepl 336 253 0 226 8 5 3 6 0 8 0 fdescpl 520 1156 0 1127 3 0 3 3 0 8 0 filepl 160 7007 0 6784 22 9 13 19 0 8 3 lockfpl 104 362 0 360 2 1 1 2 0 8 0 lockfspl 48 166 0 164 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 23 1 0 1 1 0 8 0 ucredpl 104 1562 0 1548 1 0 1 1 0 8 0 zombiepl 144 1130 0 1126 2 1 1 1 0 8 0 processpl 1192 1177 0 1126 5 0 5 5 0 8 0 procpl 656 2357 0 2300 7 0 7 7 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sosppl 168 8 0 8 2 2 0 1 0 8 0 sockpl 728 1537 0 1502 22 11 11 13 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 40 0 0 1 0 1 1 0 8 0 mbufpl 256 209 0 0 13 0 13 13 0 8 0 bufpl 280 5470 0 125 382 0 382 382 0 8 0 anonpl 24 180892 0 175088 68 32 36 47 0 184 0 amapchunkpl 152 30480 0 30077 32 10 22 27 0 158 1 amappl16 200 3570 0 3384 31 21 10 15 0 8 0 amappl15 192 10 0 10 2 2 0 1 0 8 0 amappl14 184 121 0 108 1 0 1 1 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 1823 0 1795 4 2 2 3 0 8 0 amappl11 160 85 0 71 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 110 0 97 1 0 1 1 0 8 0 amappl6 120 190 0 185 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 344 0 324 1 0 1 1 0 8 0 amappl3 96 6145 0 6050 4 0 4 4 0 8 0 amappl2 88 671 0 600 2 0 2 2 0 8 0 amappl1 80 11712 0 11047 15 0 15 15 0 8 0 amappl 88 8595 0 8455 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 128 255 0 255 3 3 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 28 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1156 0 1127 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1156 0 1127 1 0 1 1 0 8 0 vmmpekpl 168 10941 0 10892 3 0 3 3 0 8 0 vmmpepl 168 77452 0 75335 115 13 102 105 0 357 0 vmsppl 480 1155 0 1127 6 1 5 5 0 8 0 rwobjpl 72 25727 0 20757 91 0 91 91 0 8 0 pdppl 4096 2319 0 2254 115 42 73 85 0 8 8 pvpl 32 15554 0 0 126 0 126 126 0 265 0 pmappl 256 1155 0 1127 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 410 0 56 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83883ff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833f6e71) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8339deb2) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff800031fec870,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff800031fec870) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff800031fec950, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83883ff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833f6e71) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8339deb2) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff800031fec870,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff800031fec870) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001495000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtioctl(11e5f,80044403,ffff800031fecbb0,81,ffff8000ffff0cf0) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd800cfcab08,80044403,ffff800031fecbb0,81,fffffd807f7d34e0,ffff8000ffff0cf0) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806be56e00,80044403,ffff800031fecbb0,ffff8000ffff0cf0) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff0cf0,ffff800031fecd90,ffff800031fecce0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff800031fecd90) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031fecd90) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8cc605f73d0, count: -21 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7381a4de3a90, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7381a4de3a90, count: -1