witness: lock order reversal: 1st 0xffff800010fdfa00 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806f287638 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff83120c01 -> 0xffffffff830cf67f is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:537 #2 soreceive+0x28e sys/kern/uipc_socket.c:876 #3 fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b #6 vndsetcred+0xa1 sys/dev/vnd.c:684 #7 vndioctl+0xe6c sys/dev/vnd.c:485 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x5c3 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:537 #2 sosplice+0x40d sys/kern/uipc_socket.c:1358 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1221 #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 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(fffffd806f287638,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806f287620,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806f287620,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805aec31b0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805aec31b0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c670648) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c670648) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fdf840,fffffd805b9ea300,ffff8000ffff6cd0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fdf840,fffffd8068104900,fffffd805b9ea300,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fdf840,fffffd805b9ea300,ffff80003c6708c8,0,0,8) at sosend+0x804 sendit(ffff8000ffff6cd0,8,ffff80003c670a40,8,ffff80003c670b00) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffff6cd0,ffff80003c670bb0,ffff80003c670b00) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c670bb0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c670bb0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc8978d00160, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c6702c0 rbx 0xfffffd800433f0a8 rdx 0xffff8000012aa740 rcx 0xffff8000ffff6cd0 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c6701a0 r9 0x8080808080808080 r10 0x15d3564d83eeff7d r11 0x933569ca37b11877 r12 0 r13 0xfffffd8003b56f00 r14 0x3 r15 0xffffffff rip 0xffffffff82a6fbd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c6702b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=359656 pid=54383 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=61, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff76f0,0xffffffff8360c558 process=0xffff80003c5bf000 user=0xffff80003c66b000, vmspace=0xfffffd807eb8d558 estcpu=24, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54383 127503 57333 60928 2 0x10 syz-executor *54383 359656 57333 60928 7 0x4000010 syz-executor 33467 403592 80209 0 2 0 syz-executor 33467 21904 80209 0 3 0x4000080 sbwait syz-executor 99781 243777 85540 0 2 0 syz-executor 99781 311305 85540 0 3 0x4000080 bell syz-executor 88330 433668 22999 0 2 0 syz-executor 26873 226860 62370 0 2 0 syz-executor 18154 126692 8620 0 3 0x80 nanoslp syz-executor 18154 479533 8620 0 3 0x4000080 ttyout syz-executor 18154 423857 8620 0 3 0x4000080 fsleep syz-executor 18154 99528 8620 0 3 0x4000080 fsleep syz-executor 39659 303389 66114 0 2 0 syz-executor 39659 454317 66114 0 3 0x4000080 netacc syz-executor 39659 234219 66114 0 3 0x4000080 fsleep syz-executor 61731 499450 4750 0 3 0x80 nanoslp syz-executor 61731 30546 4750 0 3 0x4000080 fifor syz-executor 61731 223696 4750 0 3 0x4000080 fsleep syz-executor 35825 260166 1 0 3 0x80 nanoslp init 8620 233819 94992 0 3 0x82 nanoslp syz-executor 77178 297075 0 0 3 0x14200 acct acct 93695 99316 0 0 3 0x14200 bored sosplice 57333 8930 94992 0 3 0x82 nanoslp syz-executor 80209 518729 94992 0 3 0x82 nanoslp syz-executor 62370 62893 94992 0 3 0x82 nanoslp syz-executor 66114 364577 94992 0 3 0x82 nanoslp syz-executor 85540 7482 94992 0 3 0x82 nanoslp syz-executor 22999 71403 94992 0 3 0x82 nanoslp syz-executor 4750 400535 94992 0 3 0x82 nanoslp syz-executor 94992 115656 57804 0 3 0x82 kqread syz-executor 57804 108004 42479 0 3 0x10008a sigsusp ksh 42479 225820 32637 0 3 0x98 kqread sshd-session 32637 500487 44159 0 3 0x92 kqread sshd-session 44159 101024 1 0 3 0x88 kqread sshd 25802 187975 12868 74 3 0x1100092 bpf pflogd 12868 336952 1 0 3 0x80 sbwait pflogd 57009 26604 99126 73 3 0x1100090 kqread syslogd 99126 35090 1 0 3 0x100082 sbwait syslogd 83193 467553 1 0 3 0x100080 kqread resolvd 30898 68998 90865 77 3 0x100092 kqread dhcpleased 50478 230330 90865 77 3 0x100092 kqread dhcpleased 90865 429153 1 0 3 0x80 kqread dhcpleased 26812 344948 0 0 3 0x14200 bored smr 79297 501855 0 0 2 0x14200 zerothread 77950 508773 0 0 3 0x14200 aiodoned aiodoned 16279 115754 0 0 3 0x14200 syncer update 2402 46151 0 0 3 0x14200 cleaner cleaner 11916 149522 0 0 3 0x14200 reaper reaper 53804 518663 0 0 3 0x14200 pgdaemon pagedaemon 29910 14732 0 0 3 0x14200 bored viomb 1168 319599 0 0 3 0x40014200 acpi0 acpi0 18582 226023 0 0 7 0x40014200 idle1 28647 261900 0 0 3 0x14200 bored softnet3 53135 345792 0 0 3 0x14200 bored softnet2 34384 132592 0 0 3 0x14200 bored softnet1 26009 65877 0 0 3 0x14200 bored softnet0 89599 285227 0 0 3 0x14200 bored systqmp 66610 327585 0 0 3 0x14200 bored systq 3785 237625 0 0 3 0x14200 tmoslp softclockmp 41049 504213 0 0 3 0x40014200 tmoslp softclock 19576 95000 0 0 3 0x40014200 idle0 1 184903 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 54383 (syz-executor) thread 0xffff8000ffff6cd0 (359656) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8360db10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0x804 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff800010fdfa00) #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_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sblock+0xb7 sys/kern/uipc_socket2.c:537 #3 sosend+0x2e2 sys/kern/uipc_socket.c:625 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 33467 (syz-executor) thread 0xffff8000ffff76f0 (21904) exclusive rwlock sbufrcv r = 0 (0xffff800001334958) #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_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sblock+0xb7 sys/kern/uipc_socket2.c:537 #3 soreceive+0x28e sys/kern/uipc_socket.c:876 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 11044K 12013K 166960K 12347 0 pcb 19 14K 16K 166960K 211 0 rtable 156 5K 6K 166960K 484 0 pf 39 18K 21K 166960K 90 0 ifaddr 34 5K 7K 166960K 63 0 ifgroup 63 2K 2K 166960K 82 0 sysctl 3 1K 1K 166960K 5 0 counters 66 36K 36K 166960K 76 0 ioctlops 0 0K 4K 166960K 1555 0 iov 1 4K 32K 166960K 49 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1387 87K 88K 166960K 2145 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 25 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 89K 166960K 871 0 sigio 0 0K 0K 166960K 7 0 proc 63 79K 128K 166960K 645 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 123 0 in_multi 65 4K 7K 166960K 153 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 609 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 226 72K 87K 166960K 9615 0 UVM aobj 125 7K 7K 166960K 125 0 pinsyscall 42 84K 101K 166960K 2033 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 103 0 NDP 13 0K 2K 166960K 39 0 temp 55 6895K 7020K 166960K 23072 0 kqueue 15 24K 30K 166960K 144 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 94 0 91 1 0 1 1 0 8 0 rtentry 112 151 0 83 4 0 4 4 0 8 0 unpcb 144 541 0 515 4 0 4 4 0 8 2 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 808 345 0 339 7 3 4 7 0 8 2 arp 120 26 0 13 1 0 1 1 0 8 0 inpcb 376 1065 0 1051 14 9 5 14 0 8 3 nd6 136 29 0 12 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 3 1 0 1 1 0 8 0 pffrent 40 15 0 9 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 67 0 3 1 0 1 1 0 8 0 pfstkey 128 70 0 6 3 0 3 3 0 8 0 pfstate 376 69 0 5 7 0 7 7 0 8 0 pfrule 1344 27 0 20 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 643 0 326 29 2 27 29 0 8 4 art_table 32 645 0 326 4 0 4 4 0 8 0 art_node 16 148 0 88 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 4 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 21 0 11 1 0 1 1 0 8 0 shmpl 112 122 0 0 4 0 4 4 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3017 0 1516 95 0 95 95 0 8 0 ffsino 280 3017 0 1516 109 0 109 109 0 8 0 nchpl 144 4273 0 2582 64 0 64 64 0 8 0 uvmvnodes 80 3522 0 0 72 0 72 72 0 8 0 vnodes 216 3522 0 0 196 0 196 196 0 8 0 namei 1024 15021 0 15020 2 1 1 2 0 8 0 percpumem 16 52 0 5 1 0 1 1 0 8 0 kstatmem 264 36 0 10 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 11834 0 11834 10 2 8 8 1 8 8 plimitpl 152 189 0 172 1 0 1 1 0 8 0 sigapl 424 1207 0 1155 10 1 9 9 0 8 2 futexpl 64 11904 0 11900 1 0 1 1 0 8 0 knotepl 120 536 0 0 18 1 17 18 0 8 0 kqueuepl 216 234 0 222 1 0 1 1 0 8 0 pipepl 328 226 0 199 6 3 3 6 0 8 0 fdescpl 504 1166 0 1134 5 0 5 5 0 8 0 filepl 152 7450 0 7214 16 0 16 16 0 8 5 lockfpl 104 306 0 301 1 0 1 1 0 8 0 lockfspl 48 116 0 111 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 42 0 26 1 0 1 1 0 8 0 ucredpl 104 1457 0 1442 1 0 1 1 0 8 0 zombiepl 144 1155 0 1155 1 0 1 1 0 8 1 processpl 1168 1207 0 1155 6 0 6 6 0 8 1 procpl 648 2375 0 2313 9 1 8 8 0 8 1 srpgc 96 4 0 4 1 0 1 1 0 8 1 sosppl 168 9 0 9 1 0 1 1 0 8 1 sockpl 688 1713 0 1669 17 6 11 15 0 8 7 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 88 0 0 11 0 11 11 0 8 0 mtagpl 96 169 0 0 5 0 5 5 0 8 0 mbufpl 256 354 0 0 23 0 23 23 0 8 0 bufpl 280 3512 0 139 241 0 241 241 0 8 0 anonpl 24 176660 0 172924 61 7 54 58 0 185 18 amapchunkpl 152 30993 0 30478 31 1 30 30 0 158 7 amappl16 200 3698 0 3662 19 4 15 15 0 8 7 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 120 0 109 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 1845 0 1815 3 1 2 2 0 8 0 amappl11 160 54 0 38 1 0 1 1 0 8 0 amappl10 152 6 0 6 2 2 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 112 0 101 1 0 1 1 0 8 0 amappl6 120 197 0 193 1 0 1 1 0 8 0 amappl5 112 127 0 116 1 0 1 1 0 8 0 amappl4 104 340 0 318 1 0 1 1 0 8 0 amappl3 96 6201 0 6090 4 0 4 4 0 8 0 amappl2 88 696 0 634 2 0 2 2 0 8 0 amappl1 80 10692 0 10138 15 1 14 14 0 8 0 amappl 88 9160 0 8987 5 0 5 5 0 92 0 dma65536 65536 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 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 8 0 8 2 1 1 1 0 8 1 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 124 0 0 3 0 3 3 0 8 0 uaddrrnd 24 1166 0 1134 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1166 0 1134 1 0 1 1 0 8 0 vmmpekpl 168 10857 0 10815 3 0 3 3 0 8 0 vmmpepl 168 76389 0 74509 96 0 96 96 0 357 9 vmsppl 456 1165 0 1134 5 0 5 5 0 8 0 rwobjpl 64 26031 0 21472 77 0 77 77 0 8 2 pdppl 4096 2339 0 2268 109 38 71 85 0 8 0 pvpl 32 15705 0 0 127 0 127 127 0 265 0 pmappl 248 1165 0 1134 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 317 0 48 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(fffffd806f287638,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806f287620,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806f287620,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805aec31b0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805aec31b0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c670648) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c670648) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fdf840,fffffd805b9ea300,ffff8000ffff6cd0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fdf840,fffffd8068104900,fffffd805b9ea300,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fdf840,fffffd805b9ea300,ffff80003c6708c8,0,0,8) at sosend+0x804 sendit(ffff8000ffff6cd0,8,ffff80003c670a40,8,ffff80003c670b00) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffff6cd0,ffff80003c670bb0,ffff80003c670b00) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c670bb0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c670bb0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc8978d00160, count: -15 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