witness: lock order reversal: 1st 0xffff800010fc4b08 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806ea2dcb0 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff833f0cbb -> 0xffffffff833676f0 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+0xdfb 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(fffffd806ea2dcb0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ea2dc98,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ea2dc98,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805fdc67f0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805fdc67f0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80002a339be0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80002a339be0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fc4920,fffffd8061868200,ffff80003c43a2c8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff800010fc4920,fffffd8061868000,fffffd8061868200,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff800010fc4920,fffffd8061868200,ffff80002a339e68,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c43a2c8,3,ffff80002a339fe8,e,ffff80002a33a0a0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003c43a2c8,ffff80002a33a150,ffff80002a33a0a0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80002a33a150) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a33a150) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b86fcef170, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80002a339860 rbx 0 rdx 0xffff80000146f680 rcx 0xffff80003c43a2c8 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80002a339740 r9 0x8080808080808080 r10 0x19e025952803e05e r11 0xac7b6947a8f202ca r12 0xfffffd8003f2c680 r13 0xfffffd8004714790 r14 0x3 r15 0xffffffff834049f1 substchar+0xa39c rip 0xffffffff81027c95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a339850 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=96110 pid=36298 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=0xffff80003c43b258,0xffff8000fffeed20 process=0xffff80002a3cdcf8 user=0xffff80002a335000, vmspace=0xfffffd80684e2218 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83558 297714 17157 0 2 0 syz-executor 58185 215733 76895 0 2 0 syz-executor 58185 33974 76895 0 3 0x4000080 fsleep syz-executor 36298 17212 38463 0 7 0 syz-executor *36298 96110 38463 0 7 0x4000000 syz-executor 31187 245194 60826 60928 3 0x90 nanoslp syz-executor 31187 447640 60826 60928 3 0x4000090 lockf syz-executor 31187 1272 60826 60928 3 0x4000090 fsleep syz-executor 58493 259837 52262 0 3 0x80 nanoslp syz-executor 58493 18467 52262 0 3 0x4000080 lockf syz-executor 58493 312153 52262 0 3 0x4000080 fsleep syz-executor 59825 164870 58510 60928 3 0x90 nanoslp syz-executor 59825 464531 58510 60928 3 0x4000090 lockf syz-executor 59825 240442 58510 60928 3 0x4000090 netcon syz-executor 59825 305144 58510 60928 3 0x4000090 fsleep syz-executor 72575 432686 39136 0 3 0x80 nanoslp syz-executor 72575 431888 39136 0 3 0x4000080 fsleep syz-executor 72575 396387 39136 0 3 0x4000080 fsleep syz-executor 72575 82760 39136 0 3 0x4000080 lockf syz-executor 72575 3642 39136 0 3 0x4000080 fsleep syz-executor 58510 514558 79964 0 3 0x82 nanoslp syz-executor 38463 302691 79964 0 3 0x82 nanoslp syz-executor 81040 366670 79964 0 3 0x82 nanoslp syz-executor 97977 413159 0 0 3 0x14200 acct acct 1482 116865 1 0 3 0x100083 ttyopn getty 39136 438107 79964 0 3 0x82 nanoslp syz-executor 76895 419559 79964 0 3 0x82 nanoslp syz-executor 52262 296457 79964 0 3 0x82 nanoslp syz-executor 17157 18886 79964 0 3 0x82 nanoslp syz-executor 60826 446342 79964 0 3 0x82 nanoslp syz-executor 79964 104444 82651 0 3 0x82 kqread syz-executor 82651 101087 63234 0 3 0x10008a sigsusp ksh 63234 364221 9030 0 3 0x98 kqread sshd-session 9030 219964 91427 0 3 0x92 kqread sshd-session 91427 340966 1 0 3 0x88 kqread sshd 42668 371867 18102 74 3 0x1100092 bpf pflogd 18102 209876 1 0 3 0x80 sbwait pflogd 22159 26728 13599 73 3 0x1100090 kqread syslogd 13599 32872 1 0 3 0x100082 sbwait syslogd 79113 47017 1 0 3 0x100080 kqread resolvd 64981 157122 93564 77 3 0x100092 kqread dhcpleased 28733 494645 93564 77 3 0x100092 kqread dhcpleased 93564 162944 1 0 3 0x80 kqread dhcpleased 62790 274926 0 0 3 0x14200 bored smr 17364 254660 0 0 3 0x14200 pgzero zerothread 13399 510787 0 0 3 0x14200 aiodoned aiodoned 99190 20749 0 0 3 0x14200 syncer update 11985 326834 0 0 3 0x14200 cleaner cleaner 55122 75327 0 0 3 0x14200 reaper reaper 68114 345644 0 0 3 0x14200 pgdaemon pagedaemon 83742 490250 0 0 3 0x14200 bored viomb 81700 103812 0 0 3 0x40014200 acpi0 acpi0 11559 193999 0 0 3 0x40014200 idle1 49473 214142 0 0 3 0x14200 bored softnet1 54533 256825 0 0 3 0x14200 bored softnet0 3285 305422 0 0 3 0x14200 bored systqmp 66061 107678 0 0 3 0x14200 bored systq 25865 15426 0 0 3 0x14200 tmoslp softclockmp 83771 158468 0 0 3 0x40014200 tmoslp softclock 87066 95753 0 0 3 0x40014200 idle0 1 194652 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 36298 (syz-executor) thread 0xffff80003c43a2c8 (96110) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8389d228) #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 (0xffff800010fc4b08) #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 10232 11035K 11286K 166960K 12300 0 pcb 21 17K 18K 166960K 253 0 rtable 226 12K 12K 166960K 609 0 pf 41 18K 82K 166960K 223 0 ifaddr 43 8K 9K 166960K 136 0 ifgroup 62 2K 2K 166960K 252 0 sysctl 4 1K 9K 166960K 14 0 counters 72 37K 38K 166960K 286 0 ioctlops 0 0K 4K 166960K 1697 0 iov 0 0K 16K 166960K 94 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1391 87K 88K 166960K 2330 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 1353 0 sigio 0 0K 0K 166960K 29 0 proc 75 131K 164K 166960K 781 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 197 0 in_multi 83 6K 7K 166960K 200 0 ether_multi 1 0K 0K 166960K 20 0 mrt 3 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 671 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 161K 183K 166960K 14150 0 UVM aobj 37 2K 2K 166960K 39 0 pinsyscall 43 86K 101K 166960K 2593 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 84 0 NDP 14 0K 1K 166960K 96 0 temp 78 8660K 8728K 166960K 60996 0 kqueue 13 20K 32K 166960K 255 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 120 172 0 169 2 1 1 2 0 8 0 rtentry 176 171 0 84 6 0 6 6 0 8 0 unpcb 144 1205 0 1184 13 12 1 6 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 519 0 513 16 9 7 7 0 8 5 arp 136 28 0 11 1 0 1 1 0 8 0 inpcb 328 1857 0 1844 27 20 7 12 0 8 4 nd6 152 35 0 15 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 81 0 80 2 1 1 1 0 8 0 pppxif 1504 10 0 10 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 8 0 2 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 11 0 11 3 3 0 1 0 8 0 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pfstitem 24 105 0 29 1 0 1 1 0 8 0 pfstkey 128 109 0 32 3 0 3 3 0 8 0 pfstate 384 106 0 31 8 0 8 8 0 8 0 pfrule 1344 28 0 22 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 724 0 329 31 4 27 29 0 8 2 art_table 40 727 0 329 5 0 5 5 0 8 0 art_node 32 171 0 94 1 0 1 1 0 8 0 sysvmsgpl 40 116 0 80 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 46 0 36 1 0 1 1 0 8 0 shmpl 112 36 0 2 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3978 0 2469 95 0 95 95 0 8 0 ffsino 296 3978 0 2469 117 0 117 117 0 8 0 nchpl 144 5849 0 4131 64 0 64 64 0 8 0 rtmask 32 18 0 18 3 2 1 1 0 8 1 vnodes 216 4430 0 0 247 0 247 247 0 8 0 namei 1024 19839 0 19838 2 1 1 1 0 8 0 percpumem 16 158 0 107 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 152 0 120 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 23662 0 23662 12 11 1 8 1 8 1 plimitpl 152 420 0 403 1 0 1 1 0 8 0 sigapl 424 1677 0 1628 8 0 8 8 0 8 0 knotepl 120 539 0 0 16 0 16 16 0 8 0 kqueuepl 224 576 0 562 7 6 1 5 0 8 0 pipepl 344 326 0 299 12 6 6 9 0 8 3 fdescpl 528 1640 0 1608 3 0 3 3 0 8 0 filepl 160 11258 0 11028 29 16 13 18 0 8 2 lockfpl 104 439 0 424 1 0 1 1 0 8 0 lockfspl 48 169 0 159 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 71 0 54 1 0 1 1 0 8 0 ucredpl 104 2091 0 2076 1 0 1 1 0 8 0 zombiepl 144 1629 0 1628 2 1 1 1 0 8 0 processpl 1232 1677 0 1628 6 0 6 6 0 8 0 procpl 664 3818 0 3756 8 1 7 8 0 8 1 sosppl 176 11 0 11 2 1 1 1 0 8 1 sockpl 752 3268 0 3231 47 36 11 24 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 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 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 4494 0 0 281 0 281 281 0 8 0 bufpl 280 8146 0 2009 439 0 439 439 0 8 0 anonpl 32 10288 0 0 83 0 83 83 0 246 0 amapchunkpl 152 48506 0 47963 48 16 32 34 0 158 9 amappl16 200 4817 0 4546 33 18 15 15 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 31 0 30 1 0 1 1 0 8 0 amappl13 176 471 0 470 1 0 1 1 0 8 0 amappl12 168 2065 0 2023 3 0 3 3 0 8 0 amappl11 160 10 0 10 2 2 0 1 0 8 0 amappl10 152 67 0 52 1 0 1 1 0 8 0 amappl9 144 269 0 268 1 0 1 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 96 0 95 1 0 1 1 0 8 0 amappl6 120 337 0 324 1 0 1 1 0 8 0 amappl5 112 75 0 64 1 0 1 1 0 8 0 amappl4 104 454 0 424 1 0 1 1 0 8 0 amappl3 96 8365 0 8268 4 1 3 3 0 8 0 amappl2 88 1761 0 1684 2 0 2 2 0 8 0 amappl1 80 15103 0 14505 16 2 14 15 0 8 0 amappl 88 13112 0 12932 5 0 5 5 0 92 0 uvmvnodes 80 4430 0 0 91 0 91 91 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 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 128 255 0 255 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 38 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1640 0 1608 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1640 0 1608 1 0 1 1 0 8 0 vmmpekpl 168 15421 0 15378 3 0 3 3 0 8 0 vmmpepl 168 108997 0 106770 117 18 99 101 0 357 0 vmsppl 488 1639 0 1608 7 2 5 5 0 8 0 rwobjpl 80 34351 0 28700 118 2 116 116 0 8 0 pdppl 4096 3288 0 3216 122 50 72 84 0 8 0 pvpl 32 18308 0 0 149 1 148 148 0 265 0 pmappl 256 1639 0 1608 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 586 0 70 15 0 15 15 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(fffffd806ea2dcb0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ea2dc98,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ea2dc98,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805fdc67f0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805fdc67f0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80002a339be0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80002a339be0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fc4920,fffffd8061868200,ffff80003c43a2c8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff800010fc4920,fffffd8061868000,fffffd8061868200,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff800010fc4920,fffffd8061868200,ffff80002a339e68,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c43a2c8,3,ffff80002a339fe8,e,ffff80002a33a0a0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003c43a2c8,ffff80002a33a150,ffff80002a33a0a0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80002a33a150) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a33a150) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b86fcef170, 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 __mp_lock(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c453640) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c453640) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ab1570da350, count: -6