login: witness: lock order reversal: 1st 0xfffffd806c00d628 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd8079771a30 inode (&ip->i_lock) lock order [1] fdlock (&newfdp->fd_fd.fd_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830e2629 -> 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] fdlock (&newfdp->fd_fd.fd_lock) #0 rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 #1 unp_externalize+0x3e4 sys/kern/uipc_usrreq.c:1078 #2 soreceive+0xd3e sys/kern/uipc_socket.c:1090 #3 recvit+0x40a sys/kern/uipc_syscalls.c:1079 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:879 #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 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(fffffd8079771a30,9,0) at witness_checkorder+0x1047 rw_enter(fffffd8079771a20,1) at rw_enter+0x122 rrw_enter(fffffd8079771a20,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805fc871c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805fc871c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_closefile(fffffd807e242300,ffff8000371b36f0) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807e242300,ffff8000371b36f0) at vn_closefile+0x111 sys/kern/vfs_vnops.c:609 fdrop(fffffd807e242300,ffff8000371b36f0) at fdrop+0x126 sys/kern/kern_descrip.c:1274 knote_drop(fffffd80627dff00,ffff8000371b36f0) at knote_drop+0x1a1 sys/kern/kern_event.c:2142 knote_remove(ffff8000371b36f0,fffffd806eb2c0d8,fffffd806eb2c160,3,0) at knote_remove+0x239 sys/kern/kern_event.c:2025 knote_fdclose(ffff8000371b36f0,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2049 fdrelease(ffff8000371b36f0,3) at fdrelease+0xf6 sys/kern/kern_descrip.c:758 syscall(ffff8000371ec100) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371ec100) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x57a90fa2fe0, count: -14 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000371ebb80 rbx 0xfffffd80042c2250 rdx 0 rcx 0xffff8000371b36f0 rax 0xffffffff8349fff0 cpu_info_full_primary+0x1ff0 r8 0xffff8000371eba60 r9 0x8080808080808080 r10 0xdcd3c3aa17939f9b r11 0x7d8f3f46475a0f07 r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371ebb70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=203667 pid=99741 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=0xffff8000371b27c0,0xffff8000371b3478 process=0xffff800037281fb8 user=0xffff8000371e7000, vmspace=0xfffffd806bed1aa8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99741 290391 58232 60928 2 0x10 syz-executor *99741 203667 58232 60928 7 0x4000010 syz-executor 73824 67427 63375 60928 7 0x10 syz-executor 73824 339398 63375 60928 3 0x4000090 ttyopn syz-executor 73824 341129 63375 60928 3 0x4000090 ttyout syz-executor 70754 160970 27670 0 3 0x80 nanoslp syz-executor 70754 360862 27670 0 3 0x4000080 kqread syz-executor 70754 523517 27670 0 3 0x4000080 fsleep syz-executor 97566 410482 66784 0 3 0x80 nanoslp syz-executor 97566 147697 66784 0 3 0x4000080 ttyin syz-executor 97566 120199 66784 0 3 0x4000080 ttyin syz-executor 97566 293056 66784 0 3 0x4000080 fsleep syz-executor 5238 13214 82558 0 2 0 syz-executor 5238 275405 82558 0 3 0x4000080 kqread syz-executor 23423 115030 1 0 3 0x100083 ttyin getty 4114 284685 0 0 3 0x14200 acct acct 66928 282255 95985 0 3 0x82 nanoslp syz-executor 27670 127083 95985 0 3 0x82 nanoslp syz-executor 22684 349282 0 0 3 0x14280 nfsidl nfsio 88590 11586 0 0 3 0x14280 nfsidl nfsio 16225 23502 0 0 3 0x14280 nfsidl nfsio 54916 271028 0 0 3 0x14280 nfsidl nfsio 44872 499202 0 0 3 0x14280 nfsidl nfsio 65975 50845 0 0 3 0x14280 nfsidl nfsio 34263 75018 0 0 3 0x14280 nfsidl nfsio 98842 277917 0 0 3 0x14280 nfsidl nfsio 77709 111947 0 0 3 0x14280 nfsidl nfsio 88866 463061 0 0 3 0x14280 nfsidl nfsio 88875 394247 0 0 3 0x14280 nfsidl nfsio 52485 506782 0 0 3 0x14280 nfsidl nfsio 13191 162333 0 0 3 0x14280 nfsidl nfsio 6913 106342 0 0 3 0x14280 nfsidl nfsio 95727 378737 0 0 3 0x14280 nfsidl nfsio 48258 206680 0 0 3 0x14280 nfsidl nfsio 11182 160683 0 0 3 0x14280 nfsidl nfsio 16069 354563 0 0 3 0x14280 nfsidl nfsio 69470 445452 0 0 3 0x14280 nfsidl nfsio 66386 450178 0 0 3 0x14280 nfsidl nfsio 53106 116676 0 0 3 0x14200 bored sosplice 66784 408287 95985 0 3 0x82 nanoslp syz-executor 31429 8097 95985 0 3 0x82 piperd syz-executor 14798 487278 95985 0 3 0x82 piperd syz-executor 82558 362 95985 0 2 0x2 syz-executor 63375 509623 95985 0 3 0x82 nanoslp syz-executor 58232 385775 95985 0 3 0x82 nanoslp syz-executor 95985 152071 81053 0 2 0x2 syz-executor 81053 368798 91434 0 3 0x10008a sigsusp ksh 91434 493765 56669 0 3 0x98 kqread sshd-session 56669 312789 50139 0 3 0x92 kqread sshd-session 50139 48608 1 0 3 0x88 kqread sshd 54440 4252 31391 74 3 0x1100092 bpf pflogd 31391 131125 1 0 3 0x80 sbwait pflogd 98547 222164 34363 73 3 0x1100090 kqread syslogd 34363 163307 1 0 3 0x100082 sbwait syslogd 36608 503540 1 0 3 0x100080 kqread resolvd 41113 509291 64418 77 3 0x100092 kqread dhcpleased 61835 99237 64418 77 3 0x100092 kqread dhcpleased 64418 97631 1 0 3 0x80 kqread dhcpleased 714 301483 0 0 3 0x14200 bored smr 28191 218931 0 0 2 0x14200 zerothread 88958 104931 0 0 3 0x14200 aiodoned aiodoned 23931 364608 0 0 3 0x14200 syncer update 17459 48995 0 0 3 0x14200 cleaner cleaner 82711 409922 0 0 3 0x14200 reaper reaper 2800 94626 0 0 3 0x14200 pgdaemon pagedaemon 25031 518923 0 0 3 0x14200 bored viomb 89244 477810 0 0 3 0x40014200 acpi0 acpi0 21503 207223 0 0 3 0x40014200 idle1 1034 371863 0 0 3 0x14200 bored softnet3 21834 290324 0 0 3 0x14200 bored softnet2 69653 458349 0 0 3 0x14200 bored softnet1 30734 489855 0 0 3 0x14200 bored softnet0 27821 225058 0 0 3 0x14200 bored systqmp 42172 468521 0 0 3 0x14200 bored systq 24237 131374 0 0 3 0x14200 tmoslp softclockmp 32004 287373 0 0 3 0x40014200 tmoslp softclock 97384 212916 0 0 3 0x40014200 idle0 1 60585 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 99741 (syz-executor) thread 0xffff8000371b36f0 (203667) 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 vn_closefile+0x41 sys/kern/vfs_vnops.c:602 #2 fdrop+0x126 sys/kern/kern_descrip.c:1274 #3 knote_drop+0x1a1 sys/kern/kern_event.c:2142 #4 knote_remove+0x239 sys/kern/kern_event.c:2025 #5 knote_fdclose+0xf9 sys/kern/kern_event.c:2049 #6 fdrelease+0xf6 sys/kern/kern_descrip.c:758 #7 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #7 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd806c00d628) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_close+0xc4 sys/kern/kern_descrip.c:776 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11123K 11774K 166960K 13688 0 pcb 17 16K 18K 166960K 489 0 rtable 212 8K 9K 166960K 630 0 pf 38 18K 21K 166960K 127 0 ifaddr 40 7K 8K 166960K 89 0 ifgroup 55 2K 2K 166960K 145 0 sysctl 3 0K 0K 166960K 6 0 counters 64 36K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1720 0 iov 0 0K 16K 166960K 70 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 92K 166960K 2973 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 57 0 dirhash 12 2K 2K 166960K 60 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 85K 166960K 1433 0 sigio 0 0K 0K 166960K 34 0 proc 72 91K 128K 166960K 711 0 subproc 104 6K 6K 166960K 130 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 175 0 in_multi 86 6K 7K 166960K 170 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 598 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 233 72K 91K 166960K 15064 0 UVM aobj 78 3K 4K 166960K 90 0 pinsyscall 41 82K 100K 166960K 2602 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 72 0 NDP 12 0K 2K 166960K 61 0 temp 80 6827K 7082K 166960K 57684 0 kqueue 16 26K 30K 166960K 210 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 120 124 0 121 1 0 1 1 0 8 0 rtentry 112 174 0 81 4 0 4 4 0 8 0 unpcb 144 1044 0 1023 6 4 2 6 0 8 1 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 540 0 535 11 7 4 8 0 8 3 arp 120 31 0 14 1 0 1 1 0 8 0 inpcb 336 1982 0 1973 26 17 9 15 0 8 7 nd6 136 35 0 11 2 0 2 2 0 8 0 pkpcb 40 5 0 4 2 1 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 12 0 12 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 9 0 2 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 61 0 54 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 pfstitem 24 102 0 29 1 0 1 1 0 8 0 pfstkey 128 110 0 38 3 0 3 3 0 8 0 pfstate 376 105 0 34 8 0 8 8 0 8 0 pfrule 1344 29 0 22 2 0 2 2 0 8 0 art_heap8 4096 4 0 1 4 1 3 4 0 8 0 art_heap4 256 687 0 266 33 3 30 31 0 8 2 art_table 32 691 0 267 5 0 5 5 0 8 0 art_node 16 166 0 84 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 55 0 45 1 0 1 1 0 8 0 shmpl 112 87 0 12 3 0 3 3 0 8 0 dirhash 1024 49 0 32 3 0 3 3 0 8 0 dino2pl 256 4218 0 2713 95 0 95 95 0 8 0 ffsino 272 4218 0 2713 102 0 102 102 0 8 0 nchpl 144 6252 0 5706 63 36 27 63 0 8 3 uvmvnodes 80 5217 0 0 107 0 107 107 0 8 0 vnodes 216 5217 0 0 290 0 290 290 0 8 0 namei 1024 22477 0 22477 2 1 1 1 0 8 1 percpumem 16 72 0 26 1 0 1 1 0 8 0 kstatmem 264 76 0 52 3 1 2 3 0 8 0 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 17277 0 17277 10 8 2 8 1 8 2 plimitpl 152 527 0 507 1 0 1 1 0 8 0 sigapl 424 1761 0 1691 10 1 9 9 0 8 0 futexpl 64 20213 0 20211 1 0 1 1 0 8 0 knotepl 120 370 0 0 11 0 11 11 0 8 0 kqueuepl 216 446 0 434 7 4 3 3 0 8 2 pipepl 320 405 0 377 11 3 8 8 0 8 5 fdescpl 496 1719 0 1689 5 0 5 5 0 8 0 filepl 152 12010 0 11733 28 9 19 22 0 8 7 lockfpl 104 483 0 477 1 0 1 1 0 8 0 lockfspl 48 199 0 194 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 56 0 39 1 0 1 1 0 8 0 ucredpl 104 2576 0 2561 1 0 1 1 0 8 0 zombiepl 144 1692 0 1691 1 0 1 1 0 8 0 processpl 1160 1761 0 1691 6 0 6 6 0 8 0 procpl 648 3924 0 3845 8 0 8 8 0 8 0 srpgc 96 9 0 9 2 1 1 1 0 8 1 sosppl 168 14 0 14 2 1 1 1 0 8 1 sockpl 664 3184 0 3150 26 15 11 17 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 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 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 32 0 0 1 0 1 1 0 8 0 mbufpl 256 281 0 0 17 0 17 17 0 8 0 bufpl 280 4568 0 180 314 0 314 314 0 8 0 anonpl 24 259812 0 256276 64 17 47 47 0 185 12 amapchunkpl 152 49709 0 49218 35 5 30 31 0 158 7 amappl16 200 5561 0 5529 45 33 12 15 0 8 8 amappl15 192 60 0 60 1 1 0 1 0 8 0 amappl14 184 133 0 121 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2404 0 2374 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 146 0 146 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 122 0 109 1 0 1 1 0 8 0 amappl6 120 185 0 183 1 0 1 1 0 8 0 amappl5 112 152 0 140 1 0 1 1 0 8 0 amappl4 104 347 0 328 1 0 1 1 0 8 0 amappl3 96 9171 0 9076 3 0 3 3 0 8 0 amappl2 88 2078 0 1995 3 0 3 3 0 8 0 amappl1 80 13509 0 12947 15 1 14 14 0 8 0 amappl 88 14535 0 14364 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 4 0 3 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 256 0 256 3 2 1 1 0 8 1 dma64 64 7 0 7 2 2 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 89 0 12 2 0 2 2 0 8 0 uaddrrnd 24 1719 0 1689 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1719 0 1689 1 0 1 1 0 8 0 vmmpekpl 168 15719 0 15663 3 0 3 3 0 8 0 vmmpepl 168 112012 0 110190 102 8 94 94 0 357 5 vmsppl 448 1718 0 1689 6 2 4 5 0 8 0 rwobjpl 56 36735 0 30503 88 0 88 88 0 8 0 pdppl 4096 3445 0 3378 117 46 71 81 0 8 4 pvpl 32 14449 0 0 117 0 117 117 0 265 0 pmappl 248 1718 0 1689 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 446 0 81 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(fffffd8079771a30,9,0) at witness_checkorder+0x1047 rw_enter(fffffd8079771a20,1) at rw_enter+0x122 rrw_enter(fffffd8079771a20,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805fc871c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805fc871c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_closefile(fffffd807e242300,ffff8000371b36f0) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807e242300,ffff8000371b36f0) at vn_closefile+0x111 sys/kern/vfs_vnops.c:609 fdrop(fffffd807e242300,ffff8000371b36f0) at fdrop+0x126 sys/kern/kern_descrip.c:1274 knote_drop(fffffd80627dff00,ffff8000371b36f0) at knote_drop+0x1a1 sys/kern/kern_event.c:2142 knote_remove(ffff8000371b36f0,fffffd806eb2c0d8,fffffd806eb2c160,3,0) at knote_remove+0x239 sys/kern/kern_event.c:2025 knote_fdclose(ffff8000371b36f0,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2049 fdrelease(ffff8000371b36f0,3) at fdrelease+0xf6 sys/kern/kern_descrip.c:758 syscall(ffff8000371ec100) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371ec100) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x57a90fa2fe0, 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 __mp_lock(ffffffff8359d330) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a122420) at syscall+0x2cc mi_syscall sys/sys/syscall_mi.h:155 [inline] syscall(ffff80002a122420) at syscall+0x2cc sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fbe93695c90, count: -6