witness: lock order reversal: 1st 0xffff80000150c2b0 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806fdd9690 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff834013ba -> 0xffffffff833759dd is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 soreceive+0x27d sys/kern/uipc_socket.c:878 #3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xa1 sys/dev/vnd.c:685 #7 vndioctl+0xdf9 sys/dev/vnd.c:486 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 sosplice+0x312 sys/kern/uipc_socket.c:1335 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1227 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #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:438 witness_checkorder(fffffd806fdd9690,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806fdd9678,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806fdd9678,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805cf84480,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd805cf84480,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c4368a0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c4368a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff80000150c0c8,fffffd806bc0f400,ffff80002a271a08) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff80000150c0c8,fffffd8065641c00,fffffd806bc0f400,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff80000150c0c8,fffffd806bc0f400,ffff80003c436b28,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a271a08,4,ffff80003c436ca8,e,ffff80003c436d60) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80002a271a08,ffff80003c436e10,ffff80003c436d60) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c436e10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c436e10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x13605f1e0a0, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c436510 rbx 0 rdx 0xffff8000014cf3c0 rcx 0xffff80002a271a08 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c4363f0 r9 0x8080808080808080 r10 0x2caf21116862d0b4 r11 0x10dfcd7eeae30671 r12 0xfffffd8003f41880 r13 0xfffffd8004729680 r14 0x3 r15 0xffffffff8340ae0e substchar+0x3fb2 rip 0xffffffff82f02855 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c436500 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=490661 pid=35475 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a270a78,0xffff80002a270fb8 process=0xffff8000ffff5818 user=0xffff80003c431000, vmspace=0xfffffd800d543b90 estcpu=31, cpticks=3, pctcpu=0.2, user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20251 314717 68259 0 2 0 syz-executor 20251 175752 68259 0 3 0x4000080 fsleep syz-executor 20251 325692 68259 0 3 0x4000080 fsleep syz-executor 41069 36741 52828 0 2 0 syz-executor 41069 390485 52828 0 2 0x4000000 syz-executor 56579 464888 76762 0 2 0 syz-executor 56579 315910 76762 0 3 0x4000080 fsleep syz-executor 74993 273844 3322 0 2 0 syz-executor 74993 18859 3322 0 2 0x4000000 syz-executor 23985 450894 40551 0 2 0 syz-executor 23985 294969 40551 0 3 0x4000080 fsleep syz-executor 29721 193018 23997 0 2 0 syz-executor 29721 236003 23997 0 3 0x4000080 fsleep syz-executor 29721 102018 23997 0 3 0x4000080 fsleep syz-executor 35475 488761 43239 0 2 0 syz-executor *35475 490661 43239 0 7 0x4000000 syz-executor 35475 194158 43239 0 3 0x4000080 fsleep syz-executor 43239 347027 69016 0 3 0x82 nanoslp syz-executor 76762 407090 69016 0 3 0x82 nanoslp syz-executor 40551 186267 69016 0 3 0x82 nanoslp syz-executor 44254 334989 1 0 3 0x100083 ttyopn getty 52828 410110 69016 0 3 0x82 nanoslp syz-executor 3322 21953 69016 0 3 0x82 nanoslp syz-executor 99989 198671 0 0 3 0x14200 acct acct 68259 352225 69016 0 3 0x82 nanoslp syz-executor 52133 437105 69016 0 3 0x82 wait syz-executor 23997 358918 69016 0 3 0x82 nanoslp syz-executor 69016 52370 12400 0 3 0x82 kqread syz-executor 12400 359140 1080 0 3 0x10008a sigsusp ksh 1080 489578 34026 0 3 0x98 kqread sshd-session 34026 385099 67454 0 3 0x92 kqread sshd-session 67454 256511 1 0 3 0x88 kqread sshd 18876 9591 37486 74 3 0x1100092 bpf pflogd 37486 110835 1 0 3 0x80 sbwait pflogd 35615 210464 78477 73 3 0x1100090 kqread syslogd 78477 423257 1 0 3 0x100082 sbwait syslogd 65805 121869 1 0 3 0x100080 kqread resolvd 82840 281108 97447 77 3 0x100092 kqread dhcpleased 70414 219401 97447 77 3 0x100092 kqread dhcpleased 97447 83673 1 0 3 0x80 kqread dhcpleased 33492 54946 0 0 3 0x14200 bored smr 36474 233532 0 0 2 0x14200 zerothread 53293 514314 0 0 3 0x14200 aiodoned aiodoned 55998 140796 0 0 3 0x14200 syncer update 32105 146541 0 0 3 0x14200 cleaner cleaner 62696 275472 0 0 3 0x14200 reaper reaper 84057 405091 0 0 3 0x14200 pgdaemon pagedaemon 85741 106210 0 0 3 0x14200 bored viomb 5823 512847 0 0 3 0x40014200 acpi0 acpi0 20242 395675 0 0 7 0x40014200 idle1 64257 81906 0 0 3 0x14200 bored softnet1 85186 256190 0 0 3 0x14200 bored softnet0 55728 81517 0 0 3 0x14200 bored systqmp 80841 85780 0 0 3 0x14200 bored systq 20390 220275 0 0 3 0x14200 tmoslp softclockmp 82656 456523 0 0 3 0x40014200 tmoslp softclock 6851 323453 0 0 3 0x40014200 idle0 1 384321 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 35475 (syz-executor) thread 0xffff80002a271a08 (490661) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83933048) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_connect+0x28c sys/kern/uipc_usrreq.c:872 #2 uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 #3 sosend+0x804 sys/kern/uipc_socket.c:-1 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff80000150c2b0) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 sosend+0x2e9 sys/kern/uipc_socket.c:639 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 11035K 11352K 166960K 13370 0 pcb 17 14K 16K 166960K 291 0 rtable 224 10K 10K 166960K 633 0 pf 37 18K 18K 166960K 139 0 ifaddr 40 7K 7K 166960K 114 0 ifgroup 62 2K 2K 166960K 172 0 sysctl 4 1K 9K 166960K 10 0 counters 70 37K 37K 166960K 198 0 ioctlops 0 0K 4K 166960K 1822 0 iov 0 0K 16K 166960K 48 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 93K 166960K 2603 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 17 10K 11K 166960K 46 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 1202 0 sigio 0 0K 0K 166960K 92 0 proc 72 115K 164K 166960K 784 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 110 0 in_multi 84 6K 7K 166960K 193 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 556 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 65 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 252 168K 198K 166960K 12538 0 UVM aobj 8 6K 6K 166960K 9 0 pinsyscall 43 86K 102K 166960K 2483 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 84 0 NDP 13 0K 2K 166960K 80 0 temp 75 8667K 8731K 166960K 59080 0 kqueue 14 22K 34K 166960K 254 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 120 110 0 107 1 0 1 1 0 8 0 rtentry 176 192 0 101 6 1 5 6 0 8 0 unpcb 144 829 0 809 10 9 1 6 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpcb 736 478 0 473 16 12 4 7 0 8 3 arp 136 31 0 13 1 0 1 1 0 8 0 inpcb 328 1501 0 1491 11 7 4 7 0 8 3 nd6 152 40 0 20 1 0 1 1 0 8 0 pkpcb 40 110 0 110 2 1 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 54 0 54 2 1 1 1 0 8 1 pppxif 1504 5 0 5 2 2 0 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 4 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 1 0 1 1 1 0 1 0 8 0 pfstitem 24 87 0 30 1 0 1 1 0 8 0 pfstkey 128 87 0 30 2 0 2 2 0 8 0 pfstate 448 87 0 30 7 0 7 7 0 8 0 pfrule 1344 24 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 847 0 470 35 9 26 31 0 8 2 art_table 40 851 0 470 6 1 5 5 0 8 1 art_node 32 192 0 109 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 14 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 39 0 24 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 3616 0 2098 96 0 96 96 0 8 0 ffsino 296 3616 0 2098 118 0 118 118 0 8 0 nchpl 144 5274 0 4713 64 39 25 64 0 8 1 rtmask 32 10 0 10 4 3 1 1 0 8 1 vnodes 216 4410 0 0 245 0 245 245 0 8 0 namei 1024 19130 0 19129 1 0 1 1 0 8 0 percpumem 16 114 0 64 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 2 0 0 1 0 1 1 0 8 0 kstatmem 264 112 0 82 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 28716 0 28716 11 9 2 8 1 8 2 plimitpl 152 238 0 220 1 0 1 1 0 8 0 sigapl 424 1509 0 1460 6 0 6 6 0 8 0 knotepl 120 817 0 0 25 0 25 25 0 8 0 kqueuepl 224 584 0 574 9 7 2 5 0 8 1 pipepl 344 341 0 310 10 7 3 9 0 8 0 fdescpl 528 1490 0 1458 3 0 3 3 0 8 0 filepl 160 10492 0 10259 20 5 15 18 0 8 1 lockfpl 104 405 0 402 1 0 1 1 0 8 0 lockfspl 48 186 0 183 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 1617 0 1604 1 0 1 1 0 8 0 zombiepl 144 1461 0 1460 1 0 1 1 0 8 0 processpl 1232 1509 0 1460 5 1 4 5 0 8 0 procpl 664 3188 0 3129 6 0 6 6 0 8 0 sosppl 176 8 0 8 3 2 1 1 0 8 1 sockpl 752 2651 0 2618 26 18 8 18 0 8 3 mcl64k 65536 5 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 1144 0 0 72 0 72 72 0 8 0 bufpl 280 10922 0 4785 439 0 439 439 0 8 0 anonpl 32 13142 0 0 106 0 106 106 0 246 0 amapchunkpl 152 42885 0 42361 46 20 26 37 0 158 4 amappl16 200 5078 0 5031 48 42 6 32 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 7 0 7 1 1 0 1 0 8 0 amappl13 176 489 0 487 1 0 1 1 0 8 0 amappl12 168 1895 0 1852 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 56 0 41 1 0 1 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 128 100 0 99 1 0 1 1 0 8 0 amappl6 120 342 0 329 1 0 1 1 0 8 0 amappl5 112 80 0 69 1 0 1 1 0 8 0 amappl4 104 457 0 428 1 0 1 1 0 8 0 amappl3 96 7285 0 7184 4 1 3 3 0 8 0 amappl2 88 1619 0 1539 2 0 2 2 0 8 0 amappl1 80 14603 0 14010 15 2 13 15 0 8 0 amappl 88 11526 0 11352 5 0 5 5 0 92 0 uvmvnodes 80 140 0 0 3 0 3 3 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 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 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1490 0 1458 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1490 0 1458 1 0 1 1 0 8 0 vmmpekpl 168 12957 0 12893 3 0 3 3 0 8 0 vmmpepl 168 100587 0 98600 112 19 93 112 0 357 1 vmsppl 488 1489 0 1458 5 0 5 5 0 8 0 rwobjpl 80 28822 0 27715 34 4 30 34 0 8 0 pdppl 4096 2992 0 2918 112 37 75 82 0 8 1 pvpl 32 20220 0 0 164 0 164 164 0 265 0 pmappl 256 1491 0 1458 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 379 0 65 10 0 10 10 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:438 witness_checkorder(fffffd806fdd9690,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806fdd9678,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806fdd9678,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805cf84480,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd805cf84480,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c4368a0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c4368a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff80000150c0c8,fffffd806bc0f400,ffff80002a271a08) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff80000150c0c8,fffffd8065641c00,fffffd806bc0f400,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff80000150c0c8,fffffd806bc0f400,ffff80003c436b28,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a271a08,4,ffff80003c436ca8,e,ffff80003c436d60) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80002a271a08,ffff80003c436e10,ffff80003c436d60) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c436e10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c436e10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x13605f1e0a0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5