witness: lock order reversal: 1st 0xffff80000131a1c0 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd80687e32c8 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830be9a1 -> 0xffffffff8306b4aa is missing lock order [2] inode (&ip->i_lock) -> [3] 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 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 sosplice+0x3f4 sys/kern/uipc_socket.c:1454 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1228 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 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(fffffd80687e32c8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd80687e32b8,1) at rw_enter+0x122 rrw_enter(fffffd80687e32b8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806a3fb5f8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806a3fb5f8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000335919d8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000335919d8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000131a018,fffffd806ee0b500,ffff8000371ff1f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000131a018,fffffd8069c5e200,fffffd806ee0b500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000131a018,fffffd806ee0b500,ffff800033591c68,0,0,0) at sosend+0xa40 sendit(ffff8000371ff1f0,4,ffff800033591de0,0,ffff800033591ea0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371ff1f0,ffff800033591f50,ffff800033591ea0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800033591f50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800033591f50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x965bd5f8270, count: -15 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff800033591630 rbx 0xfffffd80042c32c8 rdx 0xffff800001290980 rcx 0xffff8000371ff1f0 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800033591510 r9 0x8080808080808080 r10 0x11ef4b9a21a96962 r11 0x1c97c6371f272b61 r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800033591620 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=303860 pid=54253 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371fea58,0xffffffff835f1e20 process=0xffff8000ffff0000 user=0xffff80003358d000, vmspace=0xfffffd806bf803a0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54253 135649 11162 0 2 0x10 syz-executor *54253 303860 11162 0 7 0x4000010 syz-executor 1109 251413 48674 0 3 0x80 nanoslp syz-executor 1109 518507 48674 0 3 0x4000080 sbwait syz-executor 1109 206570 48674 0 3 0x4000080 fsleep syz-executor 48026 28195 71978 0 3 0x80 nanoslp syz-executor 48026 466741 71978 0 3 0x4000080 kqsel syz-executor 48026 364547 71978 0 3 0x4000080 fsleep syz-executor 33311 227295 7636 0 3 0x80 nanoslp syz-executor 33311 379216 7636 0 3 0x4000080 pipewr syz-executor 33311 108115 7636 0 3 0x4000080 fsleep syz-executor 16705 86386 29383 60929 3 0x90 nanoslp syz-executor 16705 23435 29383 60929 3 0x4000090 kqsel syz-executor 16705 504397 29383 60929 3 0x4000090 fsleep syz-executor 16705 363171 29383 60929 3 0x4000090 fsleep syz-executor 25639 368190 90801 0 3 0x80 nanoslp syz-executor 25639 150299 90801 0 3 0x4000080 sbwait syz-executor 25639 261830 90801 0 3 0x4000080 fsleep syz-executor 57008 181584 0 0 3 0x14200 bored sosplice 24012 79113 0 0 3 0x14280 nfsidl nfsio 4421 245997 0 0 3 0x14280 nfsidl nfsio 75399 267030 0 0 3 0x14280 nfsidl nfsio 65760 309497 0 0 3 0x14280 nfsidl nfsio 37061 460842 0 0 3 0x14280 nfsidl nfsio 64368 110285 0 0 3 0x14280 nfsidl nfsio 62378 117057 0 0 3 0x14280 nfsidl nfsio 17321 412317 0 0 3 0x14280 nfsidl nfsio 62227 447985 0 0 3 0x14280 nfsidl nfsio 969 348569 0 0 3 0x14280 nfsidl nfsio 75456 78383 0 0 3 0x14280 nfsidl nfsio 65072 387779 0 0 3 0x14280 nfsidl nfsio 33639 404707 0 0 3 0x14280 nfsidl nfsio 66240 215621 0 0 3 0x14280 nfsidl nfsio 56459 321753 0 0 3 0x14280 nfsidl nfsio 2872 266889 0 0 3 0x14280 nfsidl nfsio 65684 333767 0 0 3 0x14280 nfsidl nfsio 55194 133242 0 0 3 0x14280 nfsidl nfsio 96142 48058 0 0 3 0x14280 nfsidl nfsio 43458 381663 0 0 3 0x14280 nfsidl nfsio 90801 255924 43112 0 3 0x82 nanoslp syz-executor 29383 447674 43112 0 3 0x82 nanoslp syz-executor 71978 192439 43112 0 3 0x82 nanoslp syz-executor 58384 102872 43112 0 3 0x82 nanoslp syz-executor 7636 151112 43112 0 3 0x82 nanoslp syz-executor 48674 157611 43112 0 3 0x82 nanoslp syz-executor 39975 236391 43112 0 3 0x82 nanoslp syz-executor 11162 3241 43112 0 3 0x82 nanoslp syz-executor 43112 370878 5837 0 3 0x82 kqread syz-executor 5837 522277 73463 0 3 0x10008a sigsusp ksh 73463 411132 89468 0 3 0x98 kqread sshd-session 89468 404438 64383 0 3 0x92 kqread sshd-session 85915 434516 1 0 3 0x100083 ttyin getty 64383 230547 1 0 3 0x88 kqread sshd 22711 192447 67442 74 3 0x1100092 bpf pflogd 67442 149126 1 0 3 0x80 sbwait pflogd 84355 57188 49272 73 3 0x1100090 kqread syslogd 49272 417426 1 0 3 0x100082 sbwait syslogd 66534 65548 1 0 3 0x100080 kqread resolvd 89880 374607 44390 77 3 0x100092 kqread dhcpleased 92060 191057 44390 77 3 0x100092 kqread dhcpleased 44390 284845 1 0 3 0x80 kqread dhcpleased 18788 435431 0 0 3 0x14200 bored smr 2631 4047 0 0 3 0x14200 pgzero zerothread 75368 201341 0 0 3 0x14200 aiodoned aiodoned 70034 507005 0 0 3 0x14200 syncer update 8978 108293 0 0 3 0x14200 cleaner cleaner 45258 206725 0 0 3 0x14200 reaper reaper 99927 31294 0 0 3 0x14200 pgdaemon pagedaemon 29275 311021 0 0 3 0x14200 bored viomb 96064 295710 0 0 3 0x40014200 acpi0 acpi0 90016 139570 0 0 7 0x40014200 idle1 12163 424422 0 0 3 0x14200 bored softnet3 28894 221652 0 0 3 0x14200 bored softnet2 28567 376693 0 0 3 0x14200 bored softnet1 69657 251546 0 0 3 0x14200 bored softnet0 69932 377203 0 0 3 0x14200 bored systqmp 53044 438634 0 0 3 0x14200 bored systq 18762 32256 0 0 3 0x14200 tmoslp softclockmp 4246 387782 0 0 3 0x40014200 tmoslp softclock 3051 245977 0 0 3 0x40014200 idle0 1 442200 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 54253 (syz-executor) thread 0xffff8000371ff1f0 (303860) 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_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0xa40 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #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 exclusive rwlock sbufsnd r = 0 (0xffff80000131a1c0) #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 sosend+0x2ff sys/kern/uipc_socket.c:681 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #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 10258 11190K 11699K 166960K 11919 0 pcb 18 12K 12K 166960K 72 0 rtable 169 5K 6K 166960K 392 0 pf 30 16K 19K 166960K 58 0 ifaddr 34 5K 7K 166960K 50 0 ifgroup 47 2K 2K 166960K 64 0 counters 60 35K 36K 166960K 70 0 ioctlops 0 0K 4K 166960K 1513 0 iov 0 0K 17K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1362 86K 86K 166960K 1604 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 459 0 sigio 0 0K 0K 166960K 7 0 proc 72 91K 140K 166960K 575 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 37 0 in_multi 76 5K 7K 166960K 117 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 403 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 73K 88K 166960K 5975 0 UVM aobj 16 2K 2K 166960K 17 0 pinsyscall 43 86K 104K 166960K 1548 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 10 0K 2K 166960K 31 0 temp 47 6820K 6946K 166960K 13416 0 kqueue 14 22K 31K 166960K 87 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 58 0 54 1 0 1 1 0 8 0 rtentry 112 121 0 45 4 0 4 4 0 8 0 unpcb 144 220 0 191 2 0 2 2 0 8 0 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 219 0 210 14 12 2 7 0 8 0 arp 120 22 0 9 1 0 1 1 0 8 0 inpcb 336 651 0 635 18 11 7 7 0 8 5 nd6 136 25 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 1 0 1 0 8 0 pffrag 232 4 0 1 2 1 1 1 0 482 0 pffrnode 88 4 0 1 2 1 1 1 0 8 0 pffrent 40 50 0 47 3 2 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 pfstitem 24 42 0 14 1 0 1 1 0 8 0 pfstkey 128 42 0 14 2 0 2 2 0 8 0 pfstate 376 42 0 14 4 0 4 4 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 499 0 173 29 1 28 29 0 8 2 art_table 32 501 0 173 4 0 4 4 0 8 0 art_node 16 120 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 3 2 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 14 0 1 1 0 1 1 0 8 0 dirhash 1024 24 0 7 3 0 3 3 0 8 0 dino2pl 256 2138 0 640 95 0 95 95 0 8 0 ffsino 272 2138 0 640 102 1 101 102 0 8 0 nchpl 144 2810 0 1122 63 0 63 63 0 8 0 uvmvnodes 80 2389 0 0 49 0 49 49 0 8 0 vnodes 216 2389 0 0 133 0 133 133 0 8 0 namei 1024 9627 0 9626 4 3 1 2 0 8 0 percpumem 16 49 0 5 1 0 1 1 0 8 0 kstatmem 264 30 0 10 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 15625 0 15625 10 3 7 8 1 8 7 plimitpl 152 143 0 126 1 0 1 1 0 8 0 sigapl 424 783 0 712 10 1 9 9 0 8 0 futexpl 64 5276 0 5270 2 1 1 1 0 8 0 knotepl 120 591 0 0 18 0 18 18 0 8 0 kqueuepl 216 166 0 154 3 0 3 3 0 8 2 pipepl 320 152 0 124 3 0 3 3 0 8 0 fdescpl 496 743 0 711 6 1 5 5 0 8 0 filepl 152 4028 0 3756 20 6 14 14 0 8 3 lockfpl 104 123 0 121 1 0 1 1 0 8 0 lockfspl 48 50 0 48 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 426 0 410 1 0 1 1 0 8 0 zombiepl 144 714 0 712 2 1 1 1 0 8 0 processpl 1160 783 0 712 6 0 6 6 0 8 0 procpl 648 1341 0 1258 8 0 8 8 0 8 0 srpgc 96 7 0 7 2 1 1 1 0 8 1 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 664 940 0 891 19 10 9 9 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 37 0 0 4 0 4 4 0 8 1 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 327 0 0 21 0 21 21 0 8 0 bufpl 280 5212 0 99 366 0 366 366 0 8 0 anonpl 24 199196 0 195634 71 22 49 49 0 185 20 amapchunkpl 152 19975 0 19407 36 5 31 35 0 158 8 amappl16 200 5182 0 5150 26 16 10 14 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 84 0 84 1 1 0 1 0 8 0 amappl12 168 1395 0 1363 3 1 2 2 0 8 0 amappl11 160 89 0 75 1 0 1 1 0 8 0 amappl10 152 34 0 34 1 1 0 1 0 8 0 amappl9 144 143 0 142 1 0 1 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 111 0 98 1 0 1 1 0 8 0 amappl6 120 166 0 165 1 0 1 1 0 8 0 amappl5 112 138 0 126 1 0 1 1 0 8 0 amappl4 104 318 0 301 1 0 1 1 0 8 0 amappl3 96 3593 0 3484 3 0 3 3 0 8 0 amappl2 88 1118 0 1034 4 1 3 3 0 8 0 amappl1 80 9418 0 8854 18 4 14 14 0 8 0 amappl 88 5557 0 5362 5 0 5 5 0 92 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 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 743 0 711 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 743 0 711 1 0 1 1 0 8 0 vmmpekpl 168 7734 0 7692 4 1 3 3 0 8 0 vmmpepl 168 55606 0 53672 107 14 93 94 0 357 5 vmsppl 448 742 0 711 6 2 4 5 0 8 0 rwobjpl 56 22347 0 18991 50 2 48 48 0 8 0 pdppl 4096 1493 0 1422 109 36 73 85 0 8 2 pvpl 32 27056 0 0 221 2 219 219 0 265 0 pmappl 248 742 0 711 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 433 0 71 11 0 11 11 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(fffffd80687e32c8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd80687e32b8,1) at rw_enter+0x122 rrw_enter(fffffd80687e32b8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806a3fb5f8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806a3fb5f8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000335919d8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000335919d8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000131a018,fffffd806ee0b500,ffff8000371ff1f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000131a018,fffffd8069c5e200,fffffd806ee0b500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000131a018,fffffd806ee0b500,ffff800033591c68,0,0,0) at sosend+0xa40 sendit(ffff8000371ff1f0,4,ffff800033591de0,0,ffff800033591ea0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371ff1f0,ffff800033591f50,ffff800033591ea0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800033591f50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800033591f50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x965bd5f8270, count: -15 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