witness: lock order reversal: 1st 0xfffffd805f667da8 vmmaplk (&map->lock) 2nd 0xfffffd806be311f8 inode (&ip->i_lock) lock order [1] vmmaplk (&map->lock) -> [2] inode (&ip->i_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #2 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #3 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #4 vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 #5 vndstrategy+0x4ff sys/dev/vnd.c:342 #6 physio+0x2f6 sys/kern/kern_physio.c:162 #7 spec_read+0x155 sys/kern/spec_vnops.c:215 #8 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #9 vn_read+0x17b sys/kern/vfs_vnops.c:369 #10 dofilereadv+0x230 sys/kern/sys_generic.c:252 #11 sys_readv+0xd8 sys/kern/sys_generic.c:199 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 lock order [2] inode (&ip->i_lock) -> [1] vmmaplk (&map->lock) #0 rw_do_enter_read+0x9d sys/kern/kern_rwlock.c:352 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1864 #2 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:732 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #4 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #5 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x57 #8 ffs_read+0x422 sys/ufs/ffs/ffs_vnops.c:254 #9 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #10 vn_rdwr+0x15b #11 vmcmd_map_readvn+0x142 sys/kern/exec_subr.c:249 #12 exec_process_vmcmds+0xfb sys/kern/exec_subr.c:139 #13 sys_execve+0xbd4 sys/kern/kern_exec.c:468 #14 start_init+0x3c6 sys/kern/init_main.c:716 #15 proc_trampoline+0x10 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806be311f8,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806be311e0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806be311e0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806be4ade0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806be4ade0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_rdwr(0,fffffd806be4ade0,ffff800011a26480,c,0,1,a38dd7ef7a66c95b,0,ffff800000b2a000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd800a7d9378) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff814caab0,2902,8000,ffffffff813cd180,ffff80002a4b2a50) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80002a4b2840) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e7e1eb8,ffff80002a4b2a50,0,fffffd807f7d3750) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8064b09020,ffff80002a4b2a50,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff6538,3,ffff80002a4b2a50,0,ffff80002a4b2b10) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff6538,ffff80002a4b2bc0,ffff80002a4b2b10) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80002a4b2bc0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4b2bc0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x737ef721720, count: -16 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80002a4b2320 rbx 0xfffffd800433c680 rdx 0xffff8000012b55c0 rcx 0xffff8000ffff6538 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80002a4b2200 r9 0x8080808080808080 r10 0x208cad2df30de45b r11 0x5f2791aa6b9a222b r12 0 r13 0xfffffd8003b53f00 r14 0x3 r15 0xffffffff rip 0xffffffff8239cdf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a4b2310 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=262159 pid=49716 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff6f58,0xffff8000ffff6a58 process=0xffff800033559db8 user=0xffff80002a4ad000, vmspace=0xfffffd805f667ca8 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80394 502353 5789 0 2 0 syz-executor 80394 305700 5789 0 3 0x4000080 fsleep syz-executor 96883 3181 98996 0 2 0 syz-executor 96883 47640 98996 0 3 0x4000080 fsleep syz-executor 52400 229281 96440 0 2 0 syz-executor 52400 49938 96440 0 3 0x4000080 fsleep syz-executor 49716 47297 8074 0 2 0 syz-executor *49716 262159 8074 0 7 0x4000000 syz-executor 49716 30111 8074 0 3 0x4000080 fsleep syz-executor 66569 123722 47219 0 2 0x480 syz-executor 66569 325160 47219 0 3 0x4000080 pipewr syz-executor 66569 155891 47219 0 3 0x4000080 pipewr syz-executor 66569 475073 47219 0 3 0x4000080 fsleep syz-executor 760 325279 7710 0 2 0x480 syz-executor 760 301662 7710 0 3 0x4000080 kqread syz-executor 760 111795 7710 0 3 0x4000080 fsleep syz-executor 66183 358755 4146 0 3 0x80 nanoslp syz-executor 66183 488741 4146 0 3 0x4000080 fsleep syz-executor 66183 455905 4146 0 3 0x4000080 ttyout syz-executor 66183 293992 4146 0 3 0x4000080 fsleep syz-executor 26191 223259 0 0 3 0x14200 acct acct 28988 199260 41763 0 3 0x82 sbwait sshd-session 47219 218811 34757 0 3 0x82 nanoslp syz-executor 8074 224828 34757 0 3 0x82 nanoslp syz-executor 83012 108860 0 0 3 0x14200 bored sosplice 96440 41957 34757 0 2 0x482 syz-executor 5789 382504 34757 0 3 0x82 nanoslp syz-executor 30729 33579 34757 0 3 0x82 nanoslp syz-executor 4146 233520 34757 0 3 0x82 nanoslp syz-executor 7710 450847 34757 0 3 0x82 nanoslp syz-executor 98996 220886 34757 0 3 0x82 nanoslp syz-executor 34757 26221 77801 0 3 0x82 kqread syz-executor 77801 447830 15393 0 3 0x10008a sigsusp ksh 15393 494130 15564 0 3 0x98 kqread sshd-session 15564 437176 41763 0 3 0x92 kqread sshd-session 22055 430918 1 0 3 0x100083 ttyopn getty 41763 145792 1 0 3 0x88 kqread sshd 86990 424046 32248 74 3 0x1100092 bpf pflogd 32248 439642 1 0 3 0x80 sbwait pflogd 43382 425836 93413 73 3 0x1100090 kqread syslogd 93413 230420 1 0 3 0x100082 sbwait syslogd 47066 315673 1 0 3 0x100080 kqread resolvd 86171 444872 46154 77 3 0x100092 kqread dhcpleased 24369 140331 46154 77 3 0x100092 kqread dhcpleased 46154 325168 1 0 3 0x80 kqread dhcpleased 25939 520526 0 0 3 0x14200 bored smr 75029 512545 0 0 2 0x14200 zerothread 90447 58689 0 0 3 0x14200 aiodoned aiodoned 71775 498576 0 0 3 0x14200 syncer update 90401 480549 0 0 3 0x14200 cleaner cleaner 54268 284711 0 0 3 0x14200 reaper reaper 80969 191528 0 0 3 0x14200 pgdaemon pagedaemon 36348 405920 0 0 3 0x14200 bored viomb 70578 264218 0 0 3 0x40014200 acpi0 acpi0 87956 323580 0 0 7 0x40014200 idle1 9895 454934 0 0 3 0x14200 bored softnet3 63601 270953 0 0 3 0x14200 bored softnet2 22163 455849 0 0 3 0x14200 bored softnet1 25549 512190 0 0 3 0x14200 bored softnet0 3643 385793 0 0 3 0x14200 bored systqmp 5253 230948 0 0 3 0x14200 bored systq 47533 316952 0 0 3 0x14200 tmoslp softclockmp 23020 254273 0 0 2 0x40014200 softclock 91738 217987 0 0 3 0x40014200 idle0 1 382516 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49716 (syz-executor) thread 0xffff8000ffff6538 (262159) shared rwlock vmmaplk r = 0 (0xfffffd805f667da8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:172 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_read+0x155 sys/kern/spec_vnops.c:215 #5 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x230 sys/kern/sys_generic.c:252 #8 sys_readv+0xd8 sys/kern/sys_generic.c:199 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836710f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vn_read+0x56 sys/kern/vfs_vnops.c:351 #2 dofilereadv+0x230 sys/kern/sys_generic.c:252 #3 sys_readv+0xd8 sys/kern/sys_generic.c:199 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 11054K 11543K 166960K 12212 0 pcb 18 13K 13K 166960K 136 0 rtable 223 6K 7K 166960K 550 0 pf 35 17K 21K 166960K 143 0 ifaddr 40 6K 7K 166960K 68 0 ifgroup 58 2K 2K 166960K 87 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 36K 166960K 84 0 ioctlops 0 0K 4K 166960K 1582 0 iov 0 0K 16K 166960K 53 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1365 86K 86K 166960K 2063 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 33 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 906 0 sigio 0 0K 0K 166960K 11 0 proc 72 91K 128K 166960K 680 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 86 0 in_multi 93 6K 7K 166960K 165 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 4 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 552 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 74K 77K 166960K 10028 0 UVM aobj 23 4K 6K 166960K 29 0 pinsyscall 45 90K 102K 166960K 2132 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 43 0 NDP 12 0K 1K 166960K 46 0 temp 77 6900K 7156K 166960K 23255 0 kqueue 14 22K 32K 166960K 149 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 86 0 83 1 0 1 1 0 8 0 rtentry 112 161 0 58 4 0 4 4 0 8 0 unpcb 144 658 0 639 6 4 2 6 0 8 1 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 808 204 0 195 3 1 2 2 0 8 0 arp 120 28 0 13 1 0 1 1 0 8 0 inpcb 376 808 0 792 10 7 3 8 0 8 1 nd6 136 36 0 11 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1168 6 0 6 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 3 2 1 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 72 0 14 1 0 1 1 0 8 0 pfstkey 128 72 0 14 2 0 2 2 0 8 0 pfstate 376 72 0 14 6 0 6 6 0 8 0 pfrule 1344 25 0 18 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 659 0 221 30 2 28 29 0 8 0 art_table 32 661 0 221 4 0 4 4 0 8 0 art_node 16 158 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 26 0 6 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3047 0 1537 95 0 95 95 0 8 0 ffsino 280 3047 0 1537 109 0 109 109 0 8 0 nchpl 144 4292 0 2595 64 0 64 64 0 8 0 uvmvnodes 80 3480 0 0 72 0 72 72 0 8 0 vnodes 216 3480 0 0 194 0 194 194 0 8 0 namei 1024 14943 0 14943 2 1 1 1 0 8 1 percpumem 16 56 0 10 1 0 1 1 0 8 0 kstatmem 264 44 0 20 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 14694 0 14694 10 9 1 8 1 8 1 plimitpl 152 238 0 218 1 0 1 1 0 8 0 sigapl 424 1219 0 1166 8 1 7 7 0 8 1 futexpl 64 11413 0 11405 1 0 1 1 0 8 0 knotepl 120 553 0 0 17 0 17 17 0 8 0 kqueuepl 216 298 0 286 5 0 5 5 0 8 4 pipepl 328 181 0 150 3 0 3 3 0 8 0 fdescpl 504 1198 0 1165 5 0 5 5 0 8 0 filepl 152 7454 0 7211 20 6 14 16 0 8 2 lockfpl 104 287 0 284 1 0 1 1 0 8 0 lockfspl 48 114 0 111 1 0 1 1 0 8 0 sessionpl 144 31 0 21 1 0 1 1 0 8 0 pgrppl 48 46 0 28 1 0 1 1 0 8 0 ucredpl 104 1336 0 1322 1 0 1 1 0 8 0 zombiepl 144 1167 0 1166 1 0 1 1 0 8 0 processpl 1168 1219 0 1166 5 1 4 5 0 8 0 procpl 648 2490 0 2424 6 0 6 6 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sosppl 168 6 0 6 3 2 1 1 0 8 1 sockpl 688 1574 0 1536 21 15 6 16 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 43 0 0 5 0 5 5 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 233 0 0 15 0 15 15 0 8 0 bufpl 280 4886 0 131 340 0 340 340 0 8 0 anonpl 24 179313 0 175555 65 18 47 47 0 185 16 amapchunkpl 152 31675 0 31098 35 3 32 32 0 158 9 amappl16 200 3788 0 3749 30 16 14 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 130 0 117 1 0 1 1 0 8 0 amappl13 176 14 0 14 2 2 0 1 0 8 0 amappl12 168 1908 0 1875 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 248 0 247 1 0 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 121 0 108 1 0 1 1 0 8 0 amappl6 120 238 0 234 1 0 1 1 0 8 0 amappl5 112 141 0 131 1 0 1 1 0 8 0 amappl4 104 362 0 343 1 0 1 1 0 8 0 amappl3 96 6360 0 6225 4 0 4 4 0 8 0 amappl2 88 760 0 690 2 0 2 2 0 8 0 amappl1 80 11912 0 11254 17 1 16 16 0 8 1 amappl 88 9540 0 9345 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 28 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1198 0 1165 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1198 0 1165 1 0 1 1 0 8 0 vmmpekpl 168 11192 0 11139 3 0 3 3 0 8 0 vmmpepl 168 80054 0 77962 107 7 100 100 0 357 9 vmsppl 456 1197 0 1165 7 2 5 5 0 8 0 rwobjpl 64 27609 0 23036 77 3 74 74 0 8 0 pdppl 4096 2403 0 2330 125 52 73 85 0 8 0 pvpl 32 15038 0 0 123 1 122 122 0 265 0 pmappl 248 1197 0 1165 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 317 0 64 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806be311f8,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806be311e0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806be311e0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806be4ade0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806be4ade0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_rdwr(0,fffffd806be4ade0,ffff800011a26480,c,0,1,a38dd7ef7a66c95b,0,ffff800000b2a000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd800a7d9378) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff814caab0,2902,8000,ffffffff813cd180,ffff80002a4b2a50) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80002a4b2840) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e7e1eb8,ffff80002a4b2a50,0,fffffd807f7d3750) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8064b09020,ffff80002a4b2a50,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff6538,3,ffff80002a4b2a50,0,ffff80002a4b2b10) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff6538,ffff80002a4b2bc0,ffff80002a4b2b10) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80002a4b2bc0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4b2bc0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x737ef721720, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b5bff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b5bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5