kernel: page fault trap, code=10 Stopped at acpi_pdirpa+0xd55ea: uvm_fault(0xfffffd806ec291c0, 0xe9779, 0, 1) -> e kernel: page fault trap, code=0 Stopped at db_read_bytes+0x110: movzbl 0xffffffffffffffff(%r15),%eax TID PID UID PRFLAGS PFLAGS CPU COMMAND * 38154 60996 0 0 0x4000000 0K syz-executor 511531 28130 0 0x14000 0x200 1 reaper db_read_bytes(e9779,1,ffff800031789f24) at db_read_bytes+0x110 sys/arch/amd64/amd64/db_memrw.c:85 db_get_value(e9779,1,0) at db_get_value+0x59 db_disasm(e9779,0) at db_disasm+0x94 db_trap(6,10) at db_trap+0x181 sys/ddb/db_trap.c:71 db_ktrap(6,10,ffff80003178a1c0) at db_ktrap+0x303 sys/arch/amd64/amd64/db_interface.c:151 kerntrap(ffff80003178a1c0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b acpi_pdirpa() at acpi_pdirpa+0xd55ea rt_clone(ffff80003178a498,fffffd80707e4210,0) at rt_clone+0x98 sys/net/route.c:383 rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 rt_match sys/net/route.c:360 [inline] rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 sys/net/route.c:476 ip_output(fffffd8076608f00,fffffd805fcbbc00,fffffd80707e41f8,0,0,fffffd80707e4290,6626a170ac3d995f) at ip_output+0x4c7 sys/netinet/ip_output.c:189 udp_output(fffffd80707e4180,fffffd8076608f00,0,0) at udp_output+0x765 sys/netinet/udp_usrreq.c:1084 sosend(ffff8000012ffc90,0,ffff80003178a808,0,0,40a) at sosend+0xa40 sendit(ffff80002a09ece8,6,ffff80003178a900,40a,ffff80003178a9b0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 end trace frame: 0xffff80003178a980, count: 0 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(0xfffffd806ec291c0, 0xe9779, 0, 1) -> e ddb{0}> trace db_read_bytes(e9779,1,ffff800031789f24) at db_read_bytes+0x110 sys/arch/amd64/amd64/db_memrw.c:85 db_get_value(e9779,1,0) at db_get_value+0x59 db_disasm(e9779,0) at db_disasm+0x94 db_trap(6,10) at db_trap+0x181 sys/ddb/db_trap.c:71 db_ktrap(6,10,ffff80003178a1c0) at db_ktrap+0x303 sys/arch/amd64/amd64/db_interface.c:151 kerntrap(ffff80003178a1c0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b acpi_pdirpa() at acpi_pdirpa+0xd55ea rt_clone(ffff80003178a498,fffffd80707e4210,0) at rt_clone+0x98 sys/net/route.c:383 rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 rt_match sys/net/route.c:360 [inline] rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 sys/net/route.c:476 ip_output(fffffd8076608f00,fffffd805fcbbc00,fffffd80707e41f8,0,0,fffffd80707e4290,6626a170ac3d995f) at ip_output+0x4c7 sys/netinet/ip_output.c:189 udp_output(fffffd80707e4180,fffffd8076608f00,0,0) at udp_output+0x765 sys/netinet/udp_usrreq.c:1084 sosend(ffff8000012ffc90,0,ffff80003178a808,0,0,40a) at sosend+0xa40 sendit(ffff80002a09ece8,6,ffff80003178a900,40a,ffff80003178a9b0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendto(ffff80002a09ece8,ffff80003178aa60,ffff80003178a9b0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564 syscall(ffff80003178aa60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003178aa60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xff1f350b640, count: -17 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800031789f10 rbx 0x1 rdx 0xffff8000012b5f00 rcx 0xffff80002a09ece8 rax 0xffffffff83435ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003178a040 r9 0x8080808080808080 r10 0x4dcceca363dcc9a5 r11 0x509c93c73fdb7aa7 r12 0x1 r13 0x1 r14 0xffff800031789f25 r15 0xe977a acpi_pdirpa+0xd55eb rip 0xffffffff8186d3f0 db_read_bytes+0x110 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff800031789eb0 ss 0x10 db_read_bytes+0x110: movzbl 0xffffffffffffffff(%r15),%eax ddb{0}> show proc PROC (syz-executor) tid=38154 pid=60996 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a09f990,0xffff80002a09f718 process=0xffff8000ffff2d70 user=0xffff800031785000, vmspace=0xfffffd806ec291c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70935 70201 5047 0 3 0x80 fsleep syz-executor 70935 456591 5047 0 2 0x4000080 syz-executor 13391 134492 42913 0 3 0x80 fsleep syz-executor 13391 460140 42913 0 3 0x4000080 kqread syz-executor 60996 398647 61738 0 2 0 syz-executor *60996 38154 61738 0 7 0x4000000 syz-executor 53258 158163 53916 0 3 0x80 fsleep syz-executor 53258 45262 53916 0 3 0x4000080 pipewr syz-executor 42913 484234 2305 0 3 0x82 nanoslp syz-executor 7068 336566 2305 0 3 0x82 wait syz-executor 84425 153825 2305 0 2 0x2 syz-executor 53916 90111 2305 0 3 0x82 nanoslp syz-executor 80854 324259 2305 0 2 0x482 syz-executor 61738 136126 2305 0 2 0x482 syz-executor 5047 175249 2305 0 2 0x482 syz-executor 93627 500750 0 0 3 0x14280 nfsidl nfsio 72343 348523 0 0 3 0x14280 nfsidl nfsio 2948 54937 0 0 3 0x14280 nfsidl nfsio 21331 197800 0 0 3 0x14280 nfsidl nfsio 61448 173370 0 0 3 0x14280 nfsidl nfsio 32597 335701 0 0 3 0x14280 nfsidl nfsio 69286 111974 0 0 3 0x14280 nfsidl nfsio 8545 251265 0 0 3 0x14280 nfsidl nfsio 85651 470580 0 0 3 0x14280 nfsidl nfsio 90633 338234 0 0 3 0x14280 nfsidl nfsio 78165 276389 0 0 3 0x14280 nfsidl nfsio 86888 17334 0 0 3 0x14280 nfsidl nfsio 21872 261819 0 0 3 0x14280 nfsidl nfsio 20207 68407 0 0 3 0x14280 nfsidl nfsio 66570 445399 0 0 3 0x14280 nfsidl nfsio 47197 135940 0 0 3 0x14280 nfsidl nfsio 11593 313875 0 0 3 0x14280 nfsidl nfsio 8133 180168 0 0 3 0x14280 nfsidl nfsio 59848 455980 0 0 3 0x14280 nfsidl nfsio 81968 433782 0 0 3 0x14280 nfsidl nfsio 54966 211905 1 0 3 0x100083 ttyin getty 43157 229852 0 0 3 0x14200 bored sosplice 2305 196220 27482 0 3 0x82 wait syz-executor 27482 446811 40456 0 3 0x10008a sigsusp ksh 40456 515872 11472 0 3 0x98 kqread sshd-session 11472 190596 24682 0 3 0x92 kqread sshd-session 24682 322698 1 0 3 0x88 kqread sshd 74682 275417 42813 74 3 0x1100092 bpf pflogd 42813 67838 1 0 3 0x80 sbwait pflogd 16166 156862 17286 73 3 0x1100090 kqread syslogd 17286 57077 1 0 3 0x100082 sbwait syslogd 89654 24973 1 0 3 0x100080 kqread resolvd 5637 178101 32535 77 3 0x100092 kqread dhcpleased 67095 347361 32535 77 3 0x100092 kqread dhcpleased 32535 7286 1 0 3 0x80 kqread dhcpleased 17446 511529 0 0 3 0x14200 bored smr 52197 448790 0 0 2 0x14200 zerothread 89711 301385 0 0 3 0x14200 aiodoned aiodoned 11044 426243 0 0 3 0x14200 syncer update 1977 288175 0 0 3 0x14200 cleaner cleaner 28130 511531 0 0 7 0x14200 reaper 50205 419092 0 0 3 0x14200 pgdaemon pagedaemon 78553 13362 0 0 3 0x14200 bored viomb 89054 7196 0 0 3 0x40014200 acpi0 acpi0 74639 382381 0 0 3 0x40014200 idle1 49913 476887 0 0 3 0x14200 bored softnet3 69463 150662 0 0 3 0x14200 bored softnet2 52306 116476 0 0 3 0x14200 bored softnet1 85043 95736 0 0 2 0x14200 softnet0 55627 75813 0 0 3 0x14200 bored systqmp 63119 523005 0 0 3 0x14200 bored systq 99014 272068 0 0 3 0x14200 tmoslp softclockmp 98887 245697 0 0 2 0x40014200 softclock 47769 82443 0 0 3 0x40014200 idle0 1 387800 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex anonpl r = 0 (0xffffffff83532138) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0x9f sys/kern/subr_pool.c:797 #4 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #6 uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 #7 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #8 reaper+0x246 sys/kern/kern_exit.c:480 #9 proc_trampoline+0x10 Process 60996 (syz-executor) thread 0xffff80002a09ece8 (38154) Process 84425 (syz-executor) thread 0xffff80002a03f460 (153825) Process 28130 (reaper) thread 0xffff800029fd8f38 (511531) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11246K 11524K 166960K 12694 0 pcb 18 14K 16K 166960K 315 0 rtable 227 9K 9K 166960K 992 0 pf 38 18K 26K 166960K 183 0 ifaddr 42 7K 8K 166960K 162 0 ifgroup 55 2K 2K 166960K 224 0 sysctl 3 0K 1K 166960K 4 0 counters 64 36K 36K 166960K 156 0 ioctlops 0 0K 4K 166960K 1621 0 iov 0 0K 16K 166960K 92 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1417 89K 89K 166960K 2585 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 25 3K 3K 166960K 37 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 15 53K 97K 166960K 1330 0 sigio 0 0K 0K 166960K 78 0 proc 73 91K 152K 166960K 1388 0 subproc 104 6K 7K 166960K 507 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 116 0 in_multi 90 6K 7K 166960K 303 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 828 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 223 73K 89K 166960K 12536 0 UVM aobj 30 6K 6K 166960K 33 0 pinsyscall 40 80K 106K 166960K 3020 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 41 0 NDP 12 0K 1K 166960K 105 0 temp 75 6824K 6898K 166960K 52581 0 kqueue 14 22K 32K 166960K 175 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 120 113 0 110 1 0 1 1 0 8 0 rtentry 112 336 0 236 4 0 4 4 0 8 0 unpcb 144 1048 0 1029 14 13 1 6 0 8 0 syncache 336 13 0 13 5 5 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 808 627 0 620 12 10 2 8 0 8 0 arp 120 54 0 36 1 0 1 1 0 8 0 inpcb 336 1646 0 1633 16 13 3 13 0 8 0 nd6 136 80 0 58 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 39 0 31 1 0 1 1 0 8 0 ppxss 1168 10 0 10 4 3 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 10 0 2 1 0 1 1 0 482 0 pffrnode 88 10 0 2 1 0 1 1 0 8 0 pffrent 40 12 0 4 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 5 0 2 1 0 1 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstitem 24 83 0 49 1 0 1 1 0 8 0 pfstkey 128 84 0 50 2 0 2 2 0 8 0 pfstate 376 83 0 50 5 0 5 5 0 8 0 pfrule 1344 30 0 21 2 0 2 2 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1286 0 867 32 5 27 30 0 8 0 art_table 32 1287 0 867 4 0 4 4 0 8 0 art_node 16 316 0 228 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 2 1 1 1 0 8 0 semapl 112 29 0 6 1 0 1 1 0 8 0 shmpl 112 30 0 3 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3273 0 1728 97 0 97 97 0 8 0 ffsino 272 3273 0 1728 104 0 104 104 0 8 0 nchpl 144 4678 0 2952 65 0 65 65 0 8 0 uvmvnodes 80 4178 0 0 86 0 86 86 0 8 0 vnodes 216 4178 0 0 233 0 233 233 0 8 0 namei 1024 18145 0 18145 4 3 1 2 0 8 1 percpumem 16 92 0 46 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 116 0 92 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 22769 0 22769 10 9 1 8 1 8 1 plimitpl 152 316 0 299 1 0 1 1 0 8 0 sigapl 424 1595 0 1526 11 2 9 9 0 8 0 futexpl 64 14349 0 14346 3 2 1 1 0 8 0 knotepl 120 570 0 0 17 0 17 17 0 8 0 kqueuepl 216 368 0 358 6 5 1 6 0 8 0 pipepl 320 317 0 289 6 3 3 6 0 8 0 fdescpl 496 1556 0 1527 7 2 5 6 0 8 0 filepl 152 9528 0 9277 30 18 12 19 0 8 1 lockfpl 104 309 0 307 1 0 1 1 0 8 0 lockfspl 48 140 0 138 1 0 1 1 0 8 0 sessionpl 144 61 0 52 1 0 1 1 0 8 0 pgrppl 48 114 0 97 1 0 1 1 0 8 0 ucredpl 104 1547 0 1534 1 0 1 1 0 8 0 zombiepl 144 1529 0 1526 2 1 1 1 0 8 0 processpl 1160 1595 0 1526 7 1 6 6 0 8 0 procpl 648 3008 0 2935 9 2 7 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 664 2830 0 2795 38 34 4 16 0 8 0 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 139 0 0 18 0 18 18 0 8 0 mcl2k 2048 46 0 0 5 0 5 5 0 8 1 mtagpl 96 54 0 0 2 0 2 2 0 8 0 mbufpl 256 326 0 0 19 0 19 19 0 8 0 bufpl 280 9275 0 3101 442 0 442 442 0 8 0 anonpl 24 275143 0 269792 73 29 44 62 0 185 0 amapchunkpl 152 41393 0 40878 52 17 35 35 0 158 11 amappl16 200 6190 0 6123 27 22 5 17 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 189 0 177 1 0 1 1 0 8 0 amappl13 176 13 0 13 2 2 0 1 0 8 0 amappl12 168 2560 0 2530 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 17 0 17 1 1 0 1 0 8 0 amappl9 144 162 0 162 1 1 0 1 0 8 0 amappl8 136 28 0 24 1 0 1 1 0 8 0 amappl7 128 151 0 139 1 0 1 1 0 8 0 amappl6 120 415 0 413 1 0 1 1 0 8 0 amappl5 112 260 0 248 1 0 1 1 0 8 0 amappl4 104 384 0 363 1 0 1 1 0 8 0 amappl3 96 7996 0 7900 4 0 4 4 0 8 0 amappl2 88 1045 0 976 2 0 2 2 0 8 0 amappl1 80 13932 0 13375 15 1 14 14 0 8 0 amappl 88 11915 0 11755 5 0 5 5 0 92 0 dma8192 8192 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 32 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1556 0 1527 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1556 0 1527 1 0 1 1 0 8 0 vmmpekpl 168 14478 0 14420 3 0 3 3 0 8 0 vmmpepl 168 104395 0 102595 106 16 90 98 0 357 1 vmsppl 440 1555 0 1527 5 1 4 5 0 8 0 rwobjpl 56 35690 0 30531 77 3 74 74 0 8 0 pdppl 4096 3119 0 3054 149 76 73 87 0 8 8 pvpl 32 29669 0 0 239 0 239 239 0 265 0 pmappl 248 1555 0 1527 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 478 0 120 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_read_bytes(e9779,1,ffff800031789f24) at db_read_bytes+0x110 sys/arch/amd64/amd64/db_memrw.c:85 db_get_value(e9779,1,0) at db_get_value+0x59 db_disasm(e9779,0) at db_disasm+0x94 db_trap(6,10) at db_trap+0x181 sys/ddb/db_trap.c:71 db_ktrap(6,10,ffff80003178a1c0) at db_ktrap+0x303 sys/arch/amd64/amd64/db_interface.c:151 kerntrap(ffff80003178a1c0) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b acpi_pdirpa() at acpi_pdirpa+0xd55ea rt_clone(ffff80003178a498,fffffd80707e4210,0) at rt_clone+0x98 sys/net/route.c:383 rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 rt_match sys/net/route.c:360 [inline] rtalloc_mpath(fffffd80707e4210,fffffd80766087bc,0) at rtalloc_mpath+0xf2 sys/net/route.c:476 ip_output(fffffd8076608f00,fffffd805fcbbc00,fffffd80707e41f8,0,0,fffffd80707e4290,6626a170ac3d995f) at ip_output+0x4c7 sys/netinet/ip_output.c:189 udp_output(fffffd80707e4180,fffffd8076608f00,0,0) at udp_output+0x765 sys/netinet/udp_usrreq.c:1084 sosend(ffff8000012ffc90,0,ffff80003178a808,0,0,40a) at sosend+0xa40 sendit(ffff80002a09ece8,6,ffff80003178a900,40a,ffff80003178a9b0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendto(ffff80002a09ece8,ffff80003178aa60,ffff80003178a9b0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564 syscall(ffff80003178aa60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003178aa60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xff1f350b640, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835bd998) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:114 [inline] __mp_lock(ffffffff835bd998) at __mp_lock+0x190 sys/kern/kern_lock.c:144 reaper(ffff800029fd8f38) at reaper+0x24b sys/kern/kern_exit.c:481 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835bd998) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:114 [inline] __mp_lock(ffffffff835bd998) at __mp_lock+0x190 sys/kern/kern_lock.c:144 reaper(ffff800029fd8f38) at reaper+0x24b sys/kern/kern_exit.c:481 end trace frame: 0x0, count: -5