witness: lock order reversal: 1st 0xffff80000136ade8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806dd87928 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830f39f6 -> 0xffffffff8306b4aa is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 soreceive+0x295 sys/kern/uipc_socket.c:945 #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+0xf6 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x67c #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 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(fffffd806dd87928,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806dd87918,1) at rw_enter+0x122 rrw_enter(fffffd806dd87918,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806dd412d0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806dd412d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_getcwd_common(fffffd806dd412d0,fffffd807227aa28,0,0,200,0,63862994ffc7a348) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806dd412d0,fffffd807227aa28,ffff8000371da7e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688 unp_externalize(fffffd8061bc8800,101,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094 soreceive(ffff80000136ad18,ffff800034192858,ffff800034192808,0,ffff800034192848,ffff8000341929cc,6212b726034b0ff3) at soreceive+0xd3e sys/kern/uipc_socket.c:1090 recvit(ffff8000371da7e0,5,ffff8000341929a0,0,ffff800034192990) at recvit+0x40a sys/kern/uipc_syscalls.c:1079 sys_recvmmsg(ffff8000371da7e0,ffff800034192b60,ffff800034192ab0) at sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 syscall(ffff800034192b60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800034192b60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb0218b1bde0, count: -14 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000341922b0 rbx 0xfffffd80042c20b8 rdx 0xffff8000012f8f40 rcx 0xffff8000371da7e0 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800034192190 r9 0x8080808080808080 r10 0xf12352101e312fc9 r11 0xaa6701df9c39de4b r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000341922a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=365329 pid=49670 tcnt=3 stat=onproc flags process=1000000 proc=4000000 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371dacf0,0xffff8000371db720 process=0xffff8000fffe5228 user=0xffff80003418d000, vmspace=0xfffffd806ce061d8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97460 281465 92940 0 2 0 syz-executor 97460 61104 92940 0 3 0x4000080 fsleep syz-executor 61310 453508 73343 0 2 0 syz-executor 61310 430743 73343 0 3 0x4000080 fsleep syz-executor 55671 86499 85612 0 2 0 syz-executor 55671 94146 85612 0 3 0x4000080 fsleep syz-executor 61462 236883 8813 0 2 0 syz-executor 61462 457941 8813 0 2 0x4000000 syz-executor 81862 358848 87616 0 2 0 syz-executor 81862 114776 87616 0 3 0x4000080 fifow syz-executor 81862 84171 87616 0 3 0x4000080 fsleep syz-executor 49670 471195 44494 0 2 0x1000000 syz-executor *49670 365329 44494 0 7 0x5000000 syz-executor 49670 499040 44494 0 2 0x5000000 syz-executor 34177 32141 19714 0 2 0 syz-executor 34177 361063 19714 0 3 0x4000080 fsleep syz-executor 34177 133646 19714 0 3 0x4000080 fsleep syz-executor 50402 504314 55134 0 2 0 syz-executor 50402 187846 55134 0 3 0x4000080 fsleep syz-executor 50402 157850 55134 0 3 0x4000080 fsleep syz-executor 50402 344781 55134 0 2 0x4000000 syz-executor 29258 462611 0 0 3 0x14280 nfsidl nfsio 92990 221582 0 0 3 0x14280 nfsidl nfsio 95587 249316 0 0 3 0x14280 nfsidl nfsio 17368 316102 0 0 3 0x14280 nfsidl nfsio 10781 143177 0 0 3 0x14280 nfsidl nfsio 48175 443411 0 0 3 0x14280 nfsidl nfsio 85499 449073 0 0 3 0x14280 nfsidl nfsio 42828 97269 0 0 3 0x14280 nfsidl nfsio 86100 420863 0 0 3 0x14280 nfsidl nfsio 3943 465907 0 0 3 0x14280 nfsidl nfsio 41021 165172 0 0 3 0x14280 nfsidl nfsio 83823 146806 0 0 3 0x14280 nfsidl nfsio 21816 180227 0 0 3 0x14280 nfsidl nfsio 35183 246842 0 0 3 0x14280 nfsidl nfsio 94834 211510 0 0 3 0x14280 nfsidl nfsio 21014 105415 0 0 3 0x14280 nfsidl nfsio 71328 71596 0 0 3 0x14280 nfsidl nfsio 30221 50408 0 0 3 0x14280 nfsidl nfsio 55867 59719 0 0 3 0x14280 nfsidl nfsio 24080 484630 0 0 3 0x14280 nfsidl nfsio 54252 494084 1 0 3 0x100083 ttyin getty 8813 220811 36155 0 3 0x82 nanoslp syz-executor 87616 183728 36155 0 3 0x82 nanoslp syz-executor 19714 351625 36155 0 3 0x82 nanoslp syz-executor 44494 88278 36155 0 3 0x82 nanoslp syz-executor 55134 490364 36155 0 3 0x82 nanoslp syz-executor 95276 465733 0 0 3 0x14200 bored sosplice 92940 323098 36155 0 3 0x82 nanoslp syz-executor 73343 102273 36155 0 3 0x82 nanoslp syz-executor 85612 379842 36155 0 3 0x82 nanoslp syz-executor 36155 33873 61599 0 3 0x82 kqread syz-executor 61599 375650 16308 0 3 0x10008a sigsusp ksh 16308 156381 25935 0 3 0x98 kqread sshd-session 25935 398608 3896 0 3 0x92 kqread sshd-session 3896 230398 1 0 3 0x88 kqread sshd 69252 264566 61617 74 3 0x1100092 bpf pflogd 61617 400317 1 0 3 0x80 sbwait pflogd 87600 256895 46946 73 3 0x1100090 kqread syslogd 46946 370859 1 0 3 0x100082 sbwait syslogd 20455 89543 1 0 3 0x100080 kqread resolvd 34887 205597 41545 77 3 0x100092 kqread dhcpleased 67524 173998 41545 77 3 0x100092 kqread dhcpleased 41545 134473 1 0 3 0x80 kqread dhcpleased 60764 192583 0 0 3 0x14200 bored smr 31193 23582 0 0 2 0x14200 zerothread 86021 330340 0 0 3 0x14200 aiodoned aiodoned 84669 237486 0 0 3 0x14200 syncer update 60692 98952 0 0 3 0x14200 cleaner cleaner 73552 295359 0 0 3 0x14200 reaper reaper 85242 341793 0 0 3 0x14200 pgdaemon pagedaemon 5461 443257 0 0 3 0x14200 bored viomb 24895 335231 0 0 3 0x40014200 acpi0 acpi0 65168 27181 0 0 7 0x40014200 idle1 17163 274499 0 0 3 0x14200 bored softnet3 88946 246197 0 0 3 0x14200 bored softnet2 34032 312951 0 0 3 0x14200 bored softnet1 16110 183424 0 0 3 0x14200 bored softnet0 20982 373811 0 0 3 0x14200 bored systqmp 43348 407250 0 0 3 0x14200 bored systq 37471 500565 0 0 3 0x14200 tmoslp softclockmp 6426 138491 0 0 3 0x40014200 tmoslp softclock 21862 310145 0 0 3 0x40014200 idle0 1 298317 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49670 (syz-executor) thread 0xffff8000371da7e0 (365329) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8359d538) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_externalize+0x14e #2 soreceive+0xd3e sys/kern/uipc_socket.c:1090 #3 recvit+0x40a sys/kern/uipc_syscalls.c:1079 #4 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff80000136ade8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sblock+0xb7 sys/kern/uipc_socket2.c:549 #3 soreceive+0x295 sys/kern/uipc_socket.c:945 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1079 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 11144K 11573K 166960K 15041 0 pcb 17 20K 22K 166960K 601 0 rtable 173 6K 8K 166960K 752 0 pf 39 18K 27K 166960K 164 0 ifaddr 35 5K 7K 166960K 121 0 ifgroup 55 2K 2K 166960K 191 0 sysctl 4 1K 2K 166960K 13 0 counters 64 36K 37K 166960K 154 0 ioctlops 0 0K 4K 166960K 1713 0 iov 0 0K 24K 166960K 152 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1582 99K 100K 166960K 3946 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 37 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 174 0 dirhash 12 2K 2K 166960K 72 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 81K 166960K 2614 0 sigio 0 0K 0K 166960K 65 0 proc 72 91K 128K 166960K 1015 0 subproc 104 6K 6K 166960K 196 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 545 0 in_multi 66 5K 7K 166960K 260 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 1091 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 268 74K 91K 166960K 26357 0 UVM aobj 14 4K 4K 166960K 15 0 pinsyscall 43 86K 98K 166960K 3932 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 256 0 NDP 12 0K 1K 166960K 91 0 temp 75 6828K 7084K 166960K 130991 0 kqueue 14 22K 28K 166960K 434 0 SYN cache 2 10K 18K 166960K 3 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 120 400 0 396 6 5 1 3 0 8 0 rtentry 112 231 0 158 4 0 4 4 0 8 0 unpcb 144 2147 0 2125 17 13 4 6 0 8 3 syncache 336 14 0 14 6 5 1 1 0 8 1 tcpqe 32 10 0 10 5 4 1 1 0 8 1 tcpcb 808 1040 0 1029 24 16 8 8 0 8 6 arp 120 42 0 27 1 0 1 1 0 8 0 inpcb 336 3986 0 3971 45 34 11 15 0 8 8 nd6 136 52 0 36 1 0 1 1 0 8 0 pkpcb 40 11 0 11 5 4 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1168 27 0 27 6 5 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 13 0 10 1 0 1 1 0 482 0 pffrnode 88 13 0 10 1 0 1 1 0 8 0 pffrent 40 28 0 25 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 202 0 97 1 0 1 1 0 8 0 pfstkey 128 206 0 102 4 0 4 4 0 8 0 pfstate 376 202 0 99 11 0 11 11 0 8 0 pfrule 1344 29 0 22 2 0 2 2 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 893 0 561 32 8 24 29 0 8 0 art_table 32 897 0 561 4 0 4 4 0 8 0 art_node 16 225 0 161 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 9 1 0 1 1 0 8 0 semapl 112 171 0 161 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 57 0 40 3 0 3 3 0 8 0 dino2pl 256 6272 0 4760 96 0 96 96 0 8 0 ffsino 272 6272 0 4760 102 0 102 102 0 8 0 nchpl 144 9916 0 8211 64 0 64 64 0 8 0 uvmvnodes 80 5927 0 0 121 0 121 121 0 8 0 vnodes 216 5927 0 0 330 0 330 330 0 8 0 namei 1024 39011 0 39011 4 3 1 2 0 8 1 percpumem 16 91 0 45 1 0 1 1 0 8 0 kstatmem 264 114 0 90 3 1 2 3 0 8 0 scsiplug 72 16 0 16 6 6 0 1 0 8 0 scxspl 216 35568 0 35568 19 17 2 8 1 8 2 plimitpl 152 613 0 595 1 0 1 1 0 8 0 sigapl 424 2960 0 2889 10 1 9 9 0 8 0 futexpl 64 38731 0 38723 1 0 1 1 0 8 0 knotepl 120 625 0 0 18 0 18 18 0 8 0 kqueuepl 216 912 0 902 7 4 3 5 0 8 2 pipepl 320 381 0 354 3 0 3 3 0 8 0 fdescpl 496 2894 0 2862 5 0 5 5 0 8 0 filepl 152 23072 0 22817 37 17 20 20 0 8 6 lockfpl 104 1357 0 1354 4 3 1 2 0 8 0 lockfspl 48 351 0 348 1 0 1 1 0 8 0 sessionpl 144 43 0 34 1 0 1 1 0 8 0 pgrppl 48 84 0 67 1 0 1 1 0 8 0 ucredpl 104 5388 0 5375 1 0 1 1 0 8 0 zombiepl 144 3764 0 3764 3 2 1 1 0 8 1 processpl 1160 2960 0 2889 7 1 6 6 0 8 0 procpl 648 6872 0 6788 10 2 8 8 0 8 0 srpgc 96 25 0 25 6 5 1 1 0 8 1 sosppl 168 20 0 20 5 4 1 1 0 8 1 sockpl 664 6612 0 6570 49 35 14 17 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 1 4 5 0 8 0 mtagpl 96 25 0 0 1 0 1 1 0 8 0 mbufpl 256 1249 0 0 75 0 75 75 0 8 0 bufpl 280 12547 0 6373 442 0 442 442 0 8 0 anonpl 24 462682 0 452253 167 80 87 87 0 185 7 amapchunkpl 152 87186 0 86488 55 26 29 35 0 158 2 amappl16 200 12138 0 11798 110 81 29 30 0 8 3 amappl15 192 26 0 26 1 1 0 1 0 8 0 amappl14 184 154 0 142 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 3664 0 3632 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 12 0 12 3 2 1 1 0 8 1 amappl9 144 137 0 135 1 0 1 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 202 0 189 1 0 1 1 0 8 0 amappl6 120 239 0 238 1 0 1 1 0 8 0 amappl5 112 176 0 164 1 0 1 1 0 8 0 amappl4 104 382 0 362 1 0 1 1 0 8 0 amappl3 96 16034 0 15921 3 0 3 3 0 8 0 amappl2 88 3306 0 3218 3 0 3 3 0 8 0 amappl1 80 18211 0 17650 15 1 14 14 0 8 0 amappl 88 25657 0 25450 5 0 5 5 0 92 0 dma32768 32768 4 0 4 3 3 0 1 0 8 0 dma16384 16384 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 128 256 0 256 4 3 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 2895 0 2863 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2895 0 2863 1 0 1 1 0 8 0 vmmpekpl 168 23640 0 23580 3 0 3 3 0 8 0 vmmpepl 168 185385 0 183123 143 36 107 107 0 357 3 vmsppl 448 2894 0 2863 5 1 4 4 0 8 0 rwobjpl 56 57859 0 50632 109 4 105 105 0 8 1 pdppl 4096 5797 0 5726 119 46 73 79 0 8 2 pvpl 32 20838 0 0 169 1 168 168 0 265 0 pmappl 248 2894 0 2863 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 552 0 125 13 0 13 13 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(fffffd806dd87928,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806dd87918,1) at rw_enter+0x122 rrw_enter(fffffd806dd87918,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806dd412d0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806dd412d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_getcwd_common(fffffd806dd412d0,fffffd807227aa28,0,0,200,0,63862994ffc7a348) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806dd412d0,fffffd807227aa28,ffff8000371da7e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688 unp_externalize(fffffd8061bc8800,101,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094 soreceive(ffff80000136ad18,ffff800034192858,ffff800034192808,0,ffff800034192848,ffff8000341929cc,6212b726034b0ff3) at soreceive+0xd3e sys/kern/uipc_socket.c:1090 recvit(ffff8000371da7e0,5,ffff8000341929a0,0,ffff800034192990) at recvit+0x40a sys/kern/uipc_syscalls.c:1079 sys_recvmmsg(ffff8000371da7e0,ffff800034192b60,ffff800034192ab0) at sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 syscall(ffff800034192b60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800034192b60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb0218b1bde0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b7bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5