uvm_fault(0xfffffd805adfc8e8, 0x8, 0, 2) -> e kernel: page fault trap, code=2 Stopped at softclock+0xd7: movq %rcx,0x8(%rax) TID PID UID PRFLAGS PFLAGS CPU COMMAND * 83102 30964 0 0 0x4000000 0K syz-executor.7 softclock(0) at softclock+0xd7 sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000de5c00) at ttyinput+0x3da ptcwrite(600,ffff80002e9c99f0,1) at ptcwrite+0x276 sys/kern/tty_pty.c:566 spec_write(ffff80002e9c97d0) at spec_write+0xde sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd80720dd060,ffff80002e9c99f0,1,fffffd807f7d77b8) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd8071700600,ffff80002e9c99f0,0) at vn_write+0x15c sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a17ed58,5,ffff80002e9c99f0,0,ffff80002e9c9ac0) at dofilewritev+0x1ac sys/kern/sys_generic.c:375 sys_writev(ffff80002a17ed58,ffff80002e9c9b60,ffff80002e9c9ac0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002e9c9b60) at syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e9c9b60) at syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x383819c3170, count: 3 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd805adfc8e8, 0x8, 0, 2) -> e ddb{0}> trace softclock(0) at softclock+0xd7 sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000de5c00) at ttyinput+0x3da ptcwrite(600,ffff80002e9c99f0,1) at ptcwrite+0x276 sys/kern/tty_pty.c:566 spec_write(ffff80002e9c97d0) at spec_write+0xde sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd80720dd060,ffff80002e9c99f0,1,fffffd807f7d77b8) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd8071700600,ffff80002e9c99f0,0) at vn_write+0x15c sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a17ed58,5,ffff80002e9c99f0,0,ffff80002e9c9ac0) at dofilewritev+0x1ac sys/kern/sys_generic.c:375 sys_writev(ffff80002a17ed58,ffff80002e9c9b60,ffff80002e9c9ac0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002e9c9b60) at syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e9c9b60) at syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x383819c3170, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e9c9450 rbx 0xffffffff82d7ce60 timeout_todo rdx 0 rcx 0xffffffff82d7ce60 timeout_todo rax 0 r8 0 r9 0 r10 0xbc9f2d0ee30222a7 r11 0x22f1ac81456473ba r12 0 r13 0xffffffff82cf9be0 update_loadavg.to r14 0 r15 0xfffffd8065423ce0 rip 0xffffffff81809b37 softclock+0xd7 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e9c9410 ss 0x10 softclock+0xd7: movq %rcx,0x8(%rax) ddb{0}> show proc PROC (syz-executor.7) tid=83102 pid=30964 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002bca3000,0xffff80002a17d030 process=0xffff800037380028 user=0xffff80002e9c4000, vmspace=0xfffffd805adfc8e8 estcpu=36, cpticks=12, pctcpu=0.0, user=0, sys=7, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84857 340078 78682 0 2 0 syz-executor.0 84857 150518 78682 0 3 0x4000080 netcon2 syz-executor.0 84857 318774 78682 0 3 0x4000080 fsleep syz-executor.0 30964 181157 58316 0 2 0 syz-executor.7 *30964 83102 58316 0 7 0x4000000 syz-executor.7 27329 87461 49999 0 2 0x480 syz-executor.1 27329 124280 49999 0 3 0x4000080 netcon2 syz-executor.1 27329 175031 49999 0 3 0x4000080 kqread syz-executor.1 20535 388209 11615 0 2 0x480 syz-executor.3 20535 224470 11615 0 3 0x4000080 lockf syz-executor.3 20535 277025 11615 0 3 0x4000080 lockf syz-executor.3 42669 370811 51289 0 2 0 syz-executor.2 42669 290464 51289 0 3 0x4000080 fsleep syz-executor.2 42669 143356 51289 0 3 0x4000080 fsleep syz-executor.2 48813 119734 87669 0 2 0 syz-executor.4 48813 302786 87669 0 3 0x4000080 fsleep syz-executor.4 49999 353494 71343 0 2 0x482 syz-executor.1 78682 372467 71343 0 2 0x482 syz-executor.0 88767 17080 71343 0 2 0x2 syz-executor.5 11615 258221 71343 0 2 0x482 syz-executor.3 50948 425564 71343 0 2 0x482 syz-executor.6 58316 365025 71343 0 2 0x482 syz-executor.7 51289 151793 71343 0 2 0x482 syz-executor.2 87669 230956 71343 0 2 0x482 syz-executor.4 60692 375132 1 0 3 0x18100083 ttyin getty 58256 159375 0 0 3 0x14280 nfsidl nfsio 1794 73824 0 0 3 0x14280 nfsidl nfsio 87459 228352 0 0 3 0x14280 nfsidl nfsio 23554 243768 0 0 3 0x14280 nfsidl nfsio 37129 105810 0 0 3 0x14280 nfsidl nfsio 25710 325389 0 0 3 0x14280 nfsidl nfsio 91786 229878 0 0 3 0x14280 nfsidl nfsio 73455 78066 0 0 3 0x14280 nfsidl nfsio 998 400531 0 0 3 0x14280 nfsidl nfsio 31720 128878 0 0 3 0x14280 nfsidl nfsio 81948 136881 0 0 3 0x14280 nfsidl nfsio 44203 189146 0 0 3 0x14280 nfsidl nfsio 64530 354876 0 0 3 0x14280 nfsidl nfsio 43506 490384 0 0 3 0x14280 nfsidl nfsio 56311 94649 0 0 3 0x14280 nfsidl nfsio 37788 45932 0 0 3 0x14280 nfsidl nfsio 60043 408436 0 0 3 0x14280 nfsidl nfsio 63782 239769 0 0 3 0x14280 nfsidl nfsio 57676 66341 0 0 3 0x14280 nfsidl nfsio 62532 466534 0 0 3 0x14280 nfsidl nfsio 23207 310814 0 0 3 0x14200 bored sosplice 71343 418314 27003 0 3 0x1a000082 wait syz-fuzzer 71343 339682 27003 0 2 0x1e000482 syz-fuzzer 71343 485944 27003 0 3 0x1e000082 wait syz-fuzzer 71343 57608 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 202396 27003 0 3 0x1e000082 wait syz-fuzzer 71343 36267 27003 0 3 0x1e000082 wait syz-fuzzer 71343 120389 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 147661 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 374552 27003 0 3 0x1e000082 kqread syz-fuzzer 71343 190816 27003 0 3 0x1e000082 wait syz-fuzzer 71343 300686 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 480859 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 311173 27003 0 3 0x1e000082 wait syz-fuzzer 71343 283814 27003 0 3 0x1e000082 wait syz-fuzzer 71343 314067 27003 0 3 0x1e000082 thrsleep syz-fuzzer 71343 220690 27003 0 3 0x1e000082 wait syz-fuzzer 71343 415529 27003 0 3 0x1e000082 thrsleep syz-fuzzer 27003 163819 72016 0 3 0x810008a sigsusp ksh 72016 57734 20372 0 3 0x1800009a kqread sshd 20372 272565 1 0 3 0x18000088 kqread sshd 95644 377996 87009 74 3 0x19100092 bpf pflogd 87009 100139 1 0 3 0x18000080 netio pflogd 89661 88967 9727 73 3 0x19100090 kqread syslogd 9727 17720 1 0 3 0x18100082 netio syslogd 11873 520749 1 0 3 0x18100080 kqread resolvd 10549 42501 83920 77 3 0x18100092 kqread dhcpleased 88691 77039 83920 77 3 0x18100092 kqread dhcpleased 83920 505113 1 0 3 0x18000080 kqread dhcpleased 21174 488086 0 0 3 0x14200 bored smr 19666 457029 0 0 2 0x14200 zerothread 32070 336155 0 0 3 0x14200 aiodoned aiodoned 90548 228028 0 0 3 0x14200 syncer update 55292 46039 0 0 3 0x14200 cleaner cleaner 32069 197619 0 0 3 0x14200 reaper reaper 23342 389436 0 0 3 0x14200 pgdaemon pagedaemon 76943 355885 0 0 3 0x14200 bored viomb 801 67082 0 0 3 0x40014200 acpi0 acpi0 59756 377547 0 0 7 0x40014200 idle1 69320 478013 0 0 3 0x14200 bored softnet3 60007 324587 0 0 3 0x14200 bored softnet2 83690 396589 0 0 3 0x14200 bored softnet1 56387 81884 0 0 3 0x14200 bored softnet0 54429 121399 0 0 2 0x14200 systqmp 61200 514107 0 0 3 0x14200 bored systq 6517 304027 0 0 2 0x14200 softclockmp 96532 385719 0 0 2 0x40014200 softclock 76069 242879 0 0 3 0x40014200 idle0 1 323460 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82cbd260) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 softclock+0x31 sys/kern/kern_timeout.c:746 #4 softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x27 #6 ttyinput+0x3da #7 ptcwrite+0x276 sys/kern/tty_pty.c:566 #8 spec_write+0xde sys/kern/spec_vnops.c:302 #9 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 #10 vn_write+0x15c sys/kern/vfs_vnops.c:408 #11 dofilewritev+0x1ac sys/kern/sys_generic.c:375 #12 sys_writev+0xab sys/kern/sys_generic.c:322 #13 syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] #13 syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 Process 30964 (syz-executor.7) thread 0xffff80002a17ed58 (83102) Process 88767 (syz-executor.5) thread 0xffff80002a209818 (17080) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 6515K 9692K 166960K 16292 0 pcb 15 22K 25K 166960K 3191 0 rtable 232 9K 10K 166960K 5672 0 pf 37 10K 11K 166960K 737 0 ifaddr 47 19K 21K 166960K 672 0 ifgroup 64 2K 3K 166960K 1159 0 sysctl 4 1K 3K 166960K 16 0 counters 68 36K 37K 166960K 712 0 ioctlops 0 0K 4K 166960K 2779 0 iov 0 0K 34K 166960K 4946 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1691 106K 106K 166960K 8773 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 337 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 3748 0 dirhash 12 2K 3K 166960K 276 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 77K 166960K 30853 0 sigio 0 0K 0K 166960K 942 0 proc 70 91K 128K 166960K 4311 0 subproc 104 6K 7K 166960K 1241 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2312 0 in_multi 91 6K 8K 166960K 1395 0 ether_multi 1 0K 0K 166960K 37 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 5146 0 pfkey data 0 0K 0K 166960K 92 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 663 1255K 1256K 166960K 293079 0 UVM aobj 131 8K 8K 166960K 139 0 pinsyscall 26 52K 108K 166960K 4193 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1044 0 NDP 14 0K 2K 166960K 528 0 temp 75 6812K 6940K 166960K 221075 0 kqueue 14 22K 29K 166960K 2569 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 2062 0 2059 24 23 1 3 0 8 0 rtentry 112 1839 0 1735 4 0 4 4 0 8 0 unpcb 144 25146 0 25124 223 217 6 10 0 8 5 syncache 336 161 0 161 37 37 0 1 0 8 0 tcpqe 32 261 0 261 29 29 0 1 0 8 0 tcpcb 808 7945 0 7861 201 192 9 10 0 8 0 arp 120 367 0 347 1 0 1 1 0 8 0 inpcb 392 22495 0 22376 386 373 13 17 0 8 0 nd6 136 314 0 292 2 1 1 2 0 8 0 pkpcb 40 211 0 211 24 24 0 1 0 8 0 kcovpl 48 94 0 86 1 0 1 1 0 8 0 ppxss 1168 123 0 123 30 30 0 1 0 8 0 pffrag 232 449 0 444 5 4 1 1 0 482 0 pffrnode 88 443 0 438 5 4 1 1 0 8 0 pffrent 40 1430 0 1424 5 4 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 24 872 0 844 1 0 1 1 0 8 0 pfstkey 128 874 0 846 4 3 1 2 0 8 0 pfstate 376 874 0 846 20 16 4 6 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 75 0 74 7 6 1 3 0 8 0 art_heap4 256 5745 0 5288 74 42 32 35 0 8 0 art_table 32 5820 0 5362 7 2 5 5 0 8 0 art_node 16 1726 0 1633 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 0 1 0 1 1 0 8 0 semapl 112 3746 0 3736 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 193 0 176 3 0 3 3 0 8 0 dino2pl 256 41238 0 39619 103 1 102 102 0 8 0 ffsino 272 41238 0 39619 109 0 109 109 0 8 0 nchpl 144 82257 0 80523 67 0 67 67 0 8 0 uvmvnodes 80 8061 0 0 165 0 165 165 0 8 0 vnodes 216 8061 0 0 448 0 448 448 0 8 0 namei 1024 277149 0 277148 10 9 1 2 0 8 0 percpumem 16 370 0 322 1 0 1 1 0 8 0 vcpupl 2048 283 0 1 36 0 36 36 0 8 0 vmpool 696 440 0 158 28 2 26 26 0 8 0 kstatmem 264 672 0 644 4 1 3 3 0 8 0 scxspl 216 262066 0 262066 67 66 1 8 1 8 1 plimitpl 152 4295 0 4277 1 0 1 1 0 8 0 sigapl 424 31025 0 30956 29 21 8 9 0 8 0 futexpl 64 254771 0 254767 9 8 1 1 0 8 0 knotepl 120 1294 0 0 19 0 19 19 0 8 0 kqueuepl 216 6083 0 6073 97 96 1 6 0 8 0 pipepl 320 4959 0 4930 141 134 7 8 0 8 4 fdescpl 496 30983 0 30954 27 22 5 5 0 8 1 filepl 152 180480 0 180112 262 247 15 23 0 8 0 lockfpl 104 7844 0 7839 13 12 1 2 0 8 0 lockfspl 48 2053 0 2050 1 0 1 1 0 8 0 sessionpl 144 111 0 94 1 0 1 1 0 8 0 pgrppl 48 355 0 338 1 0 1 1 0 8 0 ucredpl 104 22805 0 22792 1 0 1 1 0 8 0 zombiepl 144 30957 0 30956 3 2 1 1 0 8 0 processpl 1136 31025 0 30956 6 0 6 6 0 8 0 procpl 680 80495 0 80400 28 19 9 10 0 8 0 srpgc 96 137 0 137 38 38 0 1 0 8 0 sosppl 168 371 0 369 26 25 1 1 0 8 0 sockpl 584 49952 0 49808 395 382 13 25 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 29 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 27 0 0 4 1 3 3 0 8 0 mcl4k 4096 53 0 0 4 1 3 3 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 481 0 0 38 22 16 38 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 4535 0 0 256 0 256 256 0 8 0 bufpl 280 56076 0 47919 583 0 583 583 0 8 0 anonpl 24 3152007 0 3137325 268 148 120 166 0 186 0 amapchunkpl 152 934694 0 933729 213 171 42 69 0 158 0 amappl16 200 66544 0 65923 340 300 40 45 0 8 0 amappl15 192 118 0 117 1 0 1 1 0 8 0 amappl14 184 477 0 457 5 3 2 2 0 8 0 amappl13 176 55 0 54 1 0 1 1 0 8 0 amappl12 168 32956 0 32918 3 1 2 2 0 8 0 amappl11 160 103 0 88 1 0 1 1 0 8 0 amappl10 152 236 0 216 1 0 1 1 0 8 0 amappl9 144 423 0 423 49 49 0 1 0 8 0 amappl8 136 1393 0 1208 7 0 7 7 0 8 0 amappl7 128 170 0 153 1 0 1 1 0 8 0 amappl6 120 1674 0 1646 2 1 1 2 0 8 0 amappl5 112 1083 0 1068 1 0 1 1 0 8 0 amappl4 104 1822 0 1776 2 0 2 2 0 8 0 amappl3 96 180935 0 180838 3 0 3 3 0 8 0 amappl2 88 32770 0 32682 10 7 3 4 0 8 0 amappl1 80 122503 0 121962 22 9 13 22 0 8 0 amappl 88 290935 0 290591 13 4 9 9 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 128 253 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 31423 0 31112 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31423 0 31112 2 0 2 2 0 8 0 vmmpekpl 168 200681 0 200570 5 0 5 5 0 8 0 vmmpepl 168 1838257 0 1835267 657 492 165 173 0 357 5 vmsppl 448 31422 0 31112 38 3 35 35 0 8 0 rwobjpl 56 434303 0 424135 173 28 145 145 0 8 0 pdppl 4096 62853 0 62506 1110 759 351 353 0 8 4 pvpl 32 45160 0 0 366 1 365 365 0 265 0 pmappl 248 31422 0 31112 20 0 20 20 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2492 0 1506 29 0 29 29 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace softclock(0) at softclock+0xd7 sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000de5c00) at ttyinput+0x3da ptcwrite(600,ffff80002e9c99f0,1) at ptcwrite+0x276 sys/kern/tty_pty.c:566 spec_write(ffff80002e9c97d0) at spec_write+0xde sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd80720dd060,ffff80002e9c99f0,1,fffffd807f7d77b8) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd8071700600,ffff80002e9c99f0,0) at vn_write+0x15c sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a17ed58,5,ffff80002e9c99f0,0,ffff80002e9c9ac0) at dofilewritev+0x1ac sys/kern/sys_generic.c:375 sys_writev(ffff80002a17ed58,ffff80002e9c9b60,ffff80002e9c9ac0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002e9c9b60) at syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e9c9b60) at syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x383819c3170, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -5