uvm_fault(0xfffffd80761b07b8, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at rn_add_radix_mask+0x296: movzbl 0(%r12),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *385761 40846 0 0 0x4000000 0K syz-executor rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 rn_refines sys/net/radix.c:163 [inline] rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 sys/net/radix.c:620 rn_addroute(ffff80003c4c6f98,ffff80003c4c6fa8,ffff80000148e000,ffff80003c4c6e98,8) at rn_addroute+0x1da sys/net/radix.c:807 pipex_link_session(ffff80003c4c6e98,ffff80000147a000,ffff80000147a000) at pipex_link_session+0x3af sys/net/pipex.c:-1 pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 pppac_add_session sys/net/if_pppx.c:1381 [inline] pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 sys/net/if_pppx.c:1214 VOP_IOCTL(fffffd8060995630,82907003,ffff800001703000,1,fffffd80097fd4e0,ffff80003c45ad30) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806d9742a0,82907003,ffff800001703000,ffff80003c45ad30) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c45ad30,ffff80003c4efe40,ffff80003c4efd90) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4efe40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4efe40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6c44daf0bc0, count: 6 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(0xfffffd80761b07b8, 0x0, 0, 1) -> e ddb{0}> trace rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 rn_refines sys/net/radix.c:163 [inline] rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 sys/net/radix.c:620 rn_addroute(ffff80003c4c6f98,ffff80003c4c6fa8,ffff80000148e000,ffff80003c4c6e98,8) at rn_addroute+0x1da sys/net/radix.c:807 pipex_link_session(ffff80003c4c6e98,ffff80000147a000,ffff80000147a000) at pipex_link_session+0x3af sys/net/pipex.c:-1 pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 pppac_add_session sys/net/if_pppx.c:1381 [inline] pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 sys/net/if_pppx.c:1214 VOP_IOCTL(fffffd8060995630,82907003,ffff800001703000,1,fffffd80097fd4e0,ffff80003c45ad30) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806d9742a0,82907003,ffff800001703000,ffff80003c45ad30) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c45ad30,ffff80003c4efe40,ffff80003c4efd90) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4efe40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4efe40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6c44daf0bc0, count: -9 ddb{0}> show registers rdi 0xffff80002ffd7000 rsi 0x497 rbp 0xffff80003c4ef900 rbx 0xffff80000148e040 rdx 0xffff80002ffd7000 rcx 0x496 rax 0xffff80003c4c52c8 r8 0x90 r9 0xffff80003c45ad30 r10 0x60a914d97a8b48e4 r11 0x9ffb8e52bee95b9 r12 0 r13 0xffff80003c4c6e98 r14 0 r15 0xffff800010fcab60 rip 0xffffffff818e7956 rn_add_radix_mask+0x296 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c4ef840 ss 0x10 rn_add_radix_mask+0x296: movzbl 0(%r12),%ebx ddb{0}> show proc PROC (syz-executor) tid=385761 pid=40846 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=0xffff80003c45bcc0,0xffffffff839b9030 process=0xffff80003c420e90 user=0xffff80003c4ea000, vmspace=0xfffffd80761b07b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40846 41362 62934 0 2 0 syz-executor *40846 385761 62934 0 7 0x4000000 syz-executor 92748 15416 45542 0 2 0 syz-executor 92748 418106 45542 0 2 0x4000000 syz-executor 83842 141599 93787 0 2 0x100002 sh 86277 246464 44922 0 2 0x100002 sh 3116 10399 0 0 3 0x14200 acct acct 43252 200465 91304 0 2 0 syz-executor 43252 350023 91304 0 3 0x4000080 kqsel syz-executor 45032 498638 39275 -1 2 0x10 syz-executor 45032 65230 39275 -1 3 0x4000090 fsleep syz-executor 37737 356985 63818 0 2 0 syz-executor 37737 59812 63818 0 3 0x4000080 fsleep syz-executor 44922 329319 72586 0 3 0x82 wait syz-executor 93787 178262 72586 0 3 0x82 wait syz-executor 16811 139833 12142 0 3 0x80 nanoslp syz-executor 16811 512231 12142 0 3 0x4000000 biowait syz-executor 16811 222802 12142 0 3 0x4000000 inode syz-executor 16811 491304 12142 0 3 0x4000080 fsleep syz-executor 62934 418534 72586 0 3 0x82 nanoslp syz-executor 12142 262459 72586 0 3 0x82 nanoslp syz-executor 39275 425698 72586 0 3 0x82 nanoslp syz-executor 63818 330716 72586 0 3 0x82 nanoslp syz-executor 6270 506952 31242 0 3 0x100082 sbwait arp 31242 382875 1 0 3 0x10008a sigsusp sh 45542 461640 72586 0 3 0x82 nanoslp syz-executor 91304 500731 72586 0 3 0x82 nanoslp syz-executor 72586 54570 62034 0 2 0x2 syz-executor 62034 519073 42521 0 3 0x10008a sigsusp ksh 42521 443835 36282 0 3 0x98 kqread sshd-session 36282 33116 37322 0 3 0x92 kqread sshd-session 68997 238269 1 0 3 0x100083 ttyopn getty 37322 137498 1 0 3 0x88 kqread sshd 8305 256664 96890 74 3 0x1100092 bpf pflogd 96890 159340 1 0 3 0x80 sbwait pflogd 48091 311540 85773 73 3 0x1100090 kqread syslogd 85773 7886 1 0 3 0x100082 sbwait syslogd 38197 374221 1 0 3 0x100080 kqread resolvd 41700 255393 14173 77 3 0x100092 kqread dhcpleased 75073 437876 14173 77 3 0x100092 kqread dhcpleased 14173 120827 1 0 3 0x80 kqread dhcpleased 82935 425206 0 0 3 0x14200 bored smr 78141 208767 0 0 2 0x14200 zerothread 63552 359348 0 0 3 0x14200 aiodoned aiodoned 42941 142420 0 0 3 0x14200 syncer update 64035 473862 0 0 3 0x14200 cleaner cleaner 36826 175256 0 0 3 0x14200 reaper reaper 76268 77578 0 0 3 0x14200 pgdaemon pagedaemon 29930 451021 0 0 3 0x14200 bored viomb 82154 166656 0 0 3 0x40014200 acpi0 acpi0 55564 412211 0 0 7 0x40014200 idle1 72924 417124 0 0 3 0x14200 bored softnet1 73051 283772 0 0 3 0x14200 bored softnet0 32691 286234 0 0 3 0x14200 bored systqmp 76743 449398 0 0 3 0x14200 bored systq 39895 461490 0 0 3 0x14200 tmoslp softclockmp 40064 330114 0 0 3 0x40014200 tmoslp softclock 51637 474338 0 0 3 0x40014200 idle0 1 36571 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff838772b0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pipex_link_session+0x49 sys/net/pipex.c:388 #4 pppacioctl+0x224 pppac_add_session sys/net/if_pppx.c:1381 [inline] #4 pppacioctl+0x224 sys/net/if_pppx.c:1214 #5 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #6 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #7 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 40846 (syz-executor) thread 0xffff80003c45ad30 (385761) Process 16811 (syz-executor) thread 0xffff80003c45b4f8 (512231) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10248 11188K 12448K 166960K 15485 0 pcb 18 16K 18K 166960K 655 0 rtable 210 12K 12K 166960K 822 0 pf 40 18K 82K 166960K 299 0 ifaddr 38 7K 7K 166960K 172 0 ifgroup 57 2K 2K 166960K 312 0 sysctl 4 1K 9K 166960K 17 0 counters 72 37K 38K 166960K 326 0 ioctlops 1 1K 4K 166960K 1905 0 iov 0 0K 20K 166960K 117 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1494 94K 95K 166960K 3866 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 33 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 137 0 dirhash 63 11K 14K 166960K 1602 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 114K 166960K 2343 0 sigio 0 0K 0K 166960K 66 0 proc 74 115K 180K 166960K 921 0 subproc 81 5K 5K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 394 0 in_multi 75 5K 6K 166960K 249 0 ether_multi 1 0K 0K 166960K 27 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 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 812 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 248 170K 194K 166960K 21846 0 UVM aobj 28 14K 14K 166960K 30 0 pinsyscall 46 92K 106K 166960K 3697 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 220 0 NDP 13 0K 1K 166960K 127 0 temp 83 8676K 8921K 166960K 116952 0 kqueue 15 24K 32K 166960K 394 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 120 256 0 252 3 2 1 3 0 8 0 rtentry 176 247 0 170 5 1 4 5 0 8 0 unpcb 144 1427 0 1410 15 11 4 4 0 8 3 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 736 891 0 884 25 24 1 10 0 8 0 arp 136 43 0 31 1 0 1 1 0 8 0 inpcb 328 3123 0 3109 37 27 10 13 0 8 8 nd6 152 49 0 30 1 0 1 1 0 8 0 pkpcb 40 16 0 16 6 5 1 1 0 8 1 kcovpl 48 18 0 9 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 2 1 1 0 8 1 ppxss 1192 94 0 92 2 1 1 1 0 8 0 pppxif 1504 8 0 8 3 2 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 12 0 7 1 0 1 1 0 482 0 pffrnode 88 11 0 6 1 0 1 1 0 8 0 pffrent 40 24 0 19 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 3 0 3 3 3 0 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 40 0 31 1 0 1 1 0 8 0 pfstkey 128 44 0 35 2 1 1 2 0 8 0 pfstate 448 39 0 33 4 1 3 4 0 8 0 pfrule 1344 31 0 25 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 961 0 605 34 10 24 27 0 8 1 art_table 40 964 0 605 5 1 4 5 0 8 0 art_node 32 245 0 178 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 13 2 1 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 134 0 124 1 0 1 1 0 8 0 shmpl 112 20 0 1 1 0 1 1 0 8 0 dirhash 1024 554 0 520 5 0 5 5 0 8 0 dino2pl 256 5888 0 4371 96 0 96 96 0 8 0 ffsino 296 5888 0 4371 117 0 117 117 0 8 0 nchpl 144 9107 0 8477 64 35 29 64 0 8 5 rtmask 32 22 0 21 4 3 1 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 33588 0 33588 4 2 2 2 0 8 2 percpumem 16 178 0 127 1 0 1 1 0 8 0 vcpupl 3968 7 0 1 1 0 1 1 0 8 0 vmpool 840 7 0 1 1 0 1 1 0 8 0 kstatmem 264 196 0 166 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 12 0 12 6 5 1 1 0 8 1 scxspl 216 59670 0 59669 13 11 2 8 1 8 1 plimitpl 152 570 0 551 1 0 1 1 0 8 0 sigapl 424 2656 0 2605 10 3 7 9 0 8 0 knotepl 120 684 0 0 20 0 20 20 0 8 0 kqueuepl 224 1023 0 1008 13 10 3 5 0 8 2 pipepl 344 432 0 402 13 8 5 9 0 8 1 fdescpl 528 2614 0 2580 3 0 3 3 0 8 0 filepl 160 19883 0 19647 35 16 19 19 0 8 8 lockfpl 104 1353 0 1350 4 2 2 2 0 8 1 lockfspl 48 476 0 473 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 88 0 70 1 0 1 1 0 8 0 ucredpl 104 3932 0 3918 1 0 1 1 0 8 0 zombiepl 144 2605 0 2605 1 0 1 1 0 8 1 processpl 1232 2656 0 2605 6 0 6 6 0 8 0 procpl 664 5830 0 5771 8 0 8 8 0 8 0 sosppl 176 27 0 27 6 5 1 1 0 8 1 sockpl 752 4881 0 4846 59 47 12 24 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 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 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 76 0 0 7 1 6 6 0 8 0 mtagpl 96 276 0 0 6 0 6 6 0 8 0 mbufpl 256 2007 0 0 123 0 123 123 0 8 0 bufpl 280 23528 0 17391 439 0 439 439 0 8 0 anonpl 32 15502 0 0 126 1 125 125 0 246 0 amapchunkpl 152 76406 0 75871 49 15 34 34 0 158 7 amappl16 200 12210 0 11844 93 66 27 40 0 8 3 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 4 0 4 2 2 0 1 0 8 0 amappl13 176 519 0 515 1 0 1 1 0 8 0 amappl12 168 3034 0 2990 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 46 0 32 1 0 1 1 0 8 0 amappl9 144 254 0 253 2 1 1 1 0 8 0 amappl8 136 31 0 27 1 0 1 1 0 8 0 amappl7 128 115 0 113 1 0 1 1 0 8 0 amappl6 120 381 0 364 1 0 1 1 0 8 0 amappl5 112 83 0 72 1 0 1 1 0 8 0 amappl4 104 479 0 448 1 0 1 1 0 8 0 amappl3 96 13307 0 13216 4 1 3 3 0 8 0 amappl2 88 2741 0 2661 2 0 2 2 0 8 0 amappl1 80 20518 0 19895 16 1 15 15 0 8 0 amappl 88 20623 0 20458 5 0 5 5 0 92 0 uvmvnodes 80 161 0 0 4 0 4 4 0 8 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 2 0 1 1 0 1 1 0 8 0 dma256 256 8 0 8 2 1 1 1 0 8 1 dma128 128 256 0 256 3 2 1 1 0 8 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 29 0 2 1 0 1 1 0 8 0 uaddrrnd 24 2614 0 2580 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2614 0 2580 1 0 1 1 0 8 0 vmmpekpl 168 20487 0 20426 4 1 3 3 0 8 0 vmmpepl 168 172640 0 170319 148 33 115 118 0 357 5 vmsppl 488 2613 0 2580 5 0 5 5 0 8 0 rwobjpl 80 47577 0 46076 49 15 34 38 0 8 0 pdppl 4096 5250 0 5168 115 33 82 86 0 8 0 pvpl 32 23966 0 0 193 0 193 193 0 265 0 pmappl 256 2620 0 2581 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 452 0 80 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 rn_refines sys/net/radix.c:163 [inline] rn_add_radix_mask(ffff80003c4c6e98,0) at rn_add_radix_mask+0x296 sys/net/radix.c:620 rn_addroute(ffff80003c4c6f98,ffff80003c4c6fa8,ffff80000148e000,ffff80003c4c6e98,8) at rn_addroute+0x1da sys/net/radix.c:807 pipex_link_session(ffff80003c4c6e98,ffff80000147a000,ffff80000147a000) at pipex_link_session+0x3af sys/net/pipex.c:-1 pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 pppac_add_session sys/net/if_pppx.c:1381 [inline] pppacioctl(637d,82907003,ffff800001703000,1,ffff80003c45ad30) at pppacioctl+0x224 sys/net/if_pppx.c:1214 VOP_IOCTL(fffffd8060995630,82907003,ffff800001703000,1,fffffd80097fd4e0,ffff80003c45ad30) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806d9742a0,82907003,ffff800001703000,ffff80003c45ad30) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c45ad30,ffff80003c4efe40,ffff80003c4efd90) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4efe40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4efe40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6c44daf0bc0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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: 10 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