*cpu1: uvm_fault(0xfffffd806cafd9a0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7a8338bbcba0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c466c50 rbx 0 rdx 0 rcx 0xffff8000fffd5a28 rax 0x2a r8 0xffff80003c466b80 r9 0 r10 0x1aebb8a1a60c8673 r11 0xe42d95103ed3a180 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff821ec4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c466bd0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=387663 pid=26121 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffd5260,0xffff8000fffd5508 process=0xffff8000fffd1d08 user=0xffff80003c461000, vmspace=0xfffffd806cafd3e8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *26121 387663 50213 0 7 0 syz-executor 72614 418194 44497 0 2 0 syz-executor 72614 270153 44497 0 3 0x4000080 fsleep syz-executor 64107 403447 55561 0 2 0 syz-executor 64107 225751 55561 0 2 0x4000000 syz-executor 64107 485435 55561 0 2 0x4000000 syz-executor 64107 202607 55561 0 7 0x4000000 syz-executor 68711 93433 85663 0 2 0 syz-executor 68711 413388 85663 0 3 0x4000080 kqsel syz-executor 68711 375777 85663 0 3 0x4000080 fsleep syz-executor 68711 2993 85663 0 3 0x4000080 fsleep syz-executor 59742 64433 28299 0 2 0 syz-executor 59742 173347 28299 0 3 0x4000080 fsleep syz-executor 59742 486347 28299 0 3 0x4000080 fsleep syz-executor 40542 333020 27329 0 2 0 syz-executor 40542 394502 27329 0 3 0x4000080 fsleep syz-executor 28512 66620 0 0 3 0x14280 nfsidl nfsio 49331 514232 0 0 3 0x14280 nfsidl nfsio 49285 257823 0 0 3 0x14280 nfsidl nfsio 32408 356241 0 0 3 0x14280 nfsidl nfsio 31524 401546 0 0 3 0x14280 nfsidl nfsio 27447 335425 0 0 3 0x14280 nfsidl nfsio 48131 457081 0 0 3 0x14280 nfsidl nfsio 88931 124680 0 0 3 0x14280 nfsidl nfsio 29974 364800 0 0 3 0x14280 nfsidl nfsio 68395 13340 0 0 3 0x14280 nfsidl nfsio 6516 341330 0 0 3 0x14280 nfsidl nfsio 42924 197734 0 0 3 0x14280 nfsidl nfsio 54535 259796 0 0 3 0x14280 nfsidl nfsio 94270 285974 0 0 3 0x14280 nfsidl nfsio 23109 417990 0 0 3 0x14280 nfsidl nfsio 76522 139354 0 0 3 0x14280 nfsidl nfsio 71339 66696 0 0 3 0x14280 nfsidl nfsio 59256 495145 0 0 3 0x14280 nfsidl nfsio 6436 432847 0 0 3 0x14280 nfsidl nfsio 19804 66525 0 0 3 0x14280 nfsidl nfsio 57039 115981 23008 0 3 0x100082 sbwait arp 23008 478529 42934 0 3 0x10008a sigsusp sh 50213 199346 27950 0 3 0x82 nanoslp syz-executor 33866 214073 27950 0 2 0x2 syz-executor 28299 171980 27950 0 3 0x82 nanoslp syz-executor 27329 199624 27950 0 3 0x82 nanoslp syz-executor 85663 425756 27950 0 3 0x82 nanoslp syz-executor 44497 299367 27950 0 3 0x82 nanoslp syz-executor 55561 299236 27950 0 3 0x82 nanoslp syz-executor 42934 494417 27950 0 3 0x82 wait syz-executor 27950 296676 34807 0 3 0x82 kqread syz-executor 34807 168898 15170 0 3 0x10008a sigsusp ksh 15170 433724 37390 0 3 0x98 kqread sshd-session 37390 221747 16924 0 3 0x92 kqread sshd-session 80519 361078 1 0 3 0x100083 ttyopn getty 16924 153932 1 0 3 0x88 kqread sshd 30849 25778 99236 74 3 0x1100092 bpf pflogd 99236 517392 1 0 3 0x80 sbwait pflogd 18926 123745 89627 73 3 0x1100090 kqread syslogd 89627 19763 1 0 3 0x100082 sbwait syslogd 67105 245130 1 0 3 0x100080 kqread resolvd 13612 133408 83688 77 3 0x100092 kqread dhcpleased 36012 176784 83688 77 3 0x100092 kqread dhcpleased 83688 320190 1 0 3 0x80 kqread dhcpleased 4911 249136 0 0 3 0x14200 bored smr 11389 340731 0 0 2 0x14200 zerothread 11047 237177 0 0 3 0x14200 aiodoned aiodoned 37535 148100 0 0 3 0x14200 syncer update 82613 173580 0 0 3 0x14200 cleaner cleaner 99533 469893 0 0 3 0x14200 reaper reaper 11041 377985 0 0 3 0x14200 pgdaemon pagedaemon 45047 73320 0 0 3 0x14200 bored viomb 47890 494014 0 0 3 0x40014200 acpi0 acpi0 46174 387743 0 0 3 0x40014200 idle1 77637 374601 0 0 3 0x14200 bored softnet1 89363 180772 0 0 3 0x14200 bored softnet0 23442 227336 0 0 3 0x14200 bored systqmp 11286 351294 0 0 3 0x14200 bored systq 1603 419721 0 0 3 0x14200 tmoslp softclockmp 89262 35145 0 0 3 0x40014200 tmoslp softclock 25470 75266 0 0 3 0x40014200 idle0 1 521189 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806ca84510) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 26121 (syz-executor) thread 0xffff8000fffd5a28 (387663) exclusive rwlock amaplk r = 0 (0xfffffd806cfefce8) #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 uvm_fault_check+0x8bb sys/uvm/uvm_fault.c:840 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806cafd4e8) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806ca84510) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 64107 (syz-executor) thread 0xffff8000fffd4d30 (202607) exclusive rwlock dtlk r = 0 (0xffffffff837c6078) #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 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:572 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:325 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d76a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #4 Xsyscall+0x128 Process 33866 (syz-executor) thread 0xffff80002a271240 (214073) exclusive rwlock vmmaplk r = 0 (0xfffffd806cafde70) #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:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741 #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 (0xfffffd806f7b2108) #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:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 11054K 15147K 166960K 12576 0 pcb 17 16K 18K 166960K 189 0 rtable 253 9K 10K 166960K 435 0 pf 34 17K 21K 166960K 79 0 ifaddr 41 7K 7K 166960K 60 0 ifgroup 55 2K 2K 166960K 85 0 sysctl 2 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 118 0 ioctlops 0 0K 4K 166960K 1624 0 iov 0 0K 28K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1359 86K 86K 166960K 1982 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 53 0 dirhash 51 9K 11K 166960K 771 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 93K 166960K 767 0 sigio 0 0K 0K 166960K 6 0 proc 73 115K 164K 166960K 583 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 79 0 in_multi 89 6K 6K 166960K 104 0 ether_multi 1 0K 0K 166960K 6 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 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 658 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 169K 183K 166960K 9106 0 UVM aobj 22 16K 16K 166960K 26 0 pinsyscall 45 90K 109K 166960K 1892 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 38 0 NDP 12 0K 1K 166960K 40 0 temp 56 8675K 8744K 166960K 31299 0 kqueue 14 22K 28K 166960K 123 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 141 0 137 1 0 1 1 0 8 0 rtentry 176 125 0 16 6 0 6 6 0 8 0 unpcb 144 471 0 453 6 5 1 6 0 8 0 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 736 209 0 204 5 3 2 4 0 8 1 arp 136 23 0 5 1 0 1 1 0 8 0 inpcb 328 867 0 855 8 1 7 7 0 8 5 nd6 152 24 0 0 1 0 1 1 0 8 0 pkpcb 40 5 0 5 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 24 0 24 1 0 1 1 0 8 1 pffrag 232 8 0 2 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 53 0 47 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 2 0 2 1 1 0 1 0 8 0 pfstitem 24 62 0 14 1 0 1 1 0 8 0 pfstkey 128 62 0 14 2 0 2 2 0 8 0 pfstate 448 62 0 14 7 0 7 7 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 473 0 53 29 1 28 29 0 8 1 art_table 40 475 0 53 5 0 5 5 0 8 0 art_node 32 125 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 18 0 4 1 0 1 1 0 8 0 dirhash 1024 271 0 241 5 0 5 5 0 8 0 dino2pl 256 2838 0 1341 95 0 95 95 0 8 0 ffsino 296 2838 0 1341 117 0 117 117 0 8 0 nchpl 144 3965 0 2265 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 vnodes 216 3231 0 0 180 0 180 180 0 8 0 namei 1024 13424 0 13424 1 0 1 1 0 8 1 percpumem 16 74 0 25 1 0 1 1 0 8 0 vcpupl 3968 5 0 0 1 0 1 1 0 8 0 vmpool 840 5 0 0 1 0 1 1 0 8 0 kstatmem 264 54 0 28 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 21939 0 21939 10 9 1 8 1 8 1 plimitpl 152 361 0 343 1 0 1 1 0 8 0 sigapl 424 1098 0 1029 8 0 8 8 0 8 0 knotepl 120 511 0 0 16 0 16 16 0 8 0 kqueuepl 224 363 0 351 8 6 2 5 0 8 1 pipepl 344 165 0 138 3 0 3 3 0 8 0 fdescpl 528 1061 0 1028 3 0 3 3 0 8 0 filepl 160 6401 0 6177 21 8 13 16 0 8 1 lockfpl 104 184 0 182 1 0 1 1 0 8 0 lockfspl 48 86 0 84 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 1131 0 1118 1 0 1 1 0 8 0 zombiepl 144 1427 0 1427 2 1 1 1 0 8 1 processpl 1232 1098 0 1029 6 0 6 6 0 8 0 procpl 664 2279 0 2200 8 0 8 8 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 1505 0 1470 18 7 11 17 0 8 6 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 53 0 0 2 0 2 2 0 8 0 mbufpl 256 215 0 0 13 0 13 13 0 8 0 bufpl 280 8615 0 2478 439 0 439 439 0 8 0 anonpl 32 9581 0 0 78 0 78 78 0 246 0 amapchunkpl 152 29599 0 29117 37 8 29 33 0 158 7 amappl16 200 3455 0 3424 24 12 12 19 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 8 0 7 1 0 1 1 0 8 0 amappl13 176 438 0 436 1 0 1 1 0 8 0 amappl12 168 1466 0 1422 3 0 3 3 0 8 0 amappl11 160 20 0 20 1 1 0 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 82 0 81 1 0 1 1 0 8 0 amappl6 120 301 0 286 1 0 1 1 0 8 0 amappl5 112 84 0 72 1 0 1 1 0 8 0 amappl4 104 436 0 403 1 0 1 1 0 8 0 amappl3 96 5166 0 5078 4 1 3 3 0 8 0 amappl2 88 1184 0 1107 2 0 2 2 0 8 0 amappl1 80 12188 0 11574 15 0 15 15 0 8 0 amappl 88 8292 0 8127 5 0 5 5 0 92 0 uvmvnodes 80 121 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 25 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1061 0 1028 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1061 0 1028 1 0 1 1 0 8 0 vmmpekpl 168 10293 0 10255 3 0 3 3 0 8 0 vmmpepl 168 74314 0 72327 109 6 103 103 0 357 8 vmsppl 488 1060 0 1028 5 0 5 5 0 8 0 rwobjpl 80 22422 0 21316 32 2 30 30 0 8 1 pdppl 4096 2139 0 2061 104 26 78 85 0 8 0 pvpl 32 19331 0 0 156 0 156 156 0 265 0 pmappl 256 1065 0 1028 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 34 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7a8338bbcba0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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_1(800,20) at x86_bus_space_io_read_1 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334b8ae) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e862) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c41fa70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c41fa70) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c41fdb0,81,ffff8000fffd4d30) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 end trace frame: 0xffff80003c41fc90, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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_1(800,20) at x86_bus_space_io_read_1 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334b8ae) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e862) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c41fa70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c41fa70) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c41fdb0,81,ffff8000fffd4d30) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd806abb6128,80044403,ffff80003c41fdb0,81,fffffd80097fd5b0,ffff8000fffd4d30) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c795cf8,80044403,ffff80003c41fdb0,ffff8000fffd4d30) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000fffd4d30,ffff80003c41ff90,ffff80003c41fee0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c41ff90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ff90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27cfaae4c60, count: -19