witness: lock order reversal: 1st 0xffff800010fde740 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd80709df2b8 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830a027e -> 0xffffffff8304f7ef 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+0x298 sys/kern/uipc_socket.c:877 #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:179 [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+0x3e3 sys/kern/uipc_socket.c:1386 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1231 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [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(fffffd80709df2b8,9,0) at witness_checkorder+0x1024 rw_enter(fffffd80709df2a8,1) at rw_enter+0x122 rrw_enter(fffffd80709df2a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80730b8db8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80730b8db8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800033da1f88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800033da1f88) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fde598,fffffd807e44b300,ffff8000fffe67d8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:862 uipc_dgram_send(ffff800010fde598,fffffd8073075200,fffffd807e44b300,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 sosend(ffff800010fde598,fffffd807e44b300,ffff800033da2218,0,0,0) at sosend+0xa43 sendit(ffff8000fffe67d8,3,ffff800033da2390,0,ffff800033da2450) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000fffe67d8,ffff800033da2500,ffff800033da2450) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800033da2500) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800033da2500) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcbfb99555b0, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800033da1be0 rbx 0xffffffff83061629 pp_r600_decoded_lanes+0x34594 rdx 0 rcx 0xffff8000fffe67d8 rax 0xffffffff8343eff0 cpu_info_full_primary+0x1ff0 r8 0xffff800033da1ac0 r9 0x8080808080808080 r10 0x11a9d6ca5c38762e r11 0x8aad7ee12fae27f2 r12 0xfffffd800429ff10 r13 0xfffffd8003ab7dc0 r14 0x3 r15 0xffffffff rip 0xffffffff816cefe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800033da1bd0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=83439 pid=21716 tcnt=3 stat=onproc flags process=8000000 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe7c18,0xffff8000fffe79a0 process=0xffff8000fffe9fa8 user=0xffff800033d9d000, vmspace=0xfffffd80689d3008 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96096 188031 82011 0 2 0x8000002 ndp 27678 148824 42711 0 2 0x8000490 syz-executor 27678 488003 42711 0 3 0xc000090 sbwait syz-executor 27678 168538 42711 0 3 0xc000090 fsleep syz-executor 27678 371384 42711 0 3 0xc000090 fsleep syz-executor 89446 319273 26327 0 2 0x8000000 syz-executor 89446 400587 26327 0 3 0xc000080 fsleep syz-executor 19539 250750 86470 60928 2 0x8000010 syz-executor 19539 382695 86470 60928 3 0xc000090 fsleep syz-executor 19539 139405 86470 60928 3 0xc000090 fsleep syz-executor 19539 251538 86470 60928 3 0xc000090 fsleep syz-executor 21716 146500 67372 0 2 0x8000000 syz-executor *21716 83439 67372 0 7 0xc000000 syz-executor 21716 162044 67372 0 3 0xc000080 fsleep syz-executor 82011 37732 29282 0 3 0x810008a sigsusp sh 26144 208300 85489 0 2 0x8000480 syz-executor 26144 113565 85489 0 3 0xc000080 kqsel syz-executor 29282 429684 4413 0 3 0x8000082 wait syz-executor 85489 430670 4413 0 2 0x8000482 syz-executor 67372 476299 4413 0 2 0x8000002 syz-executor 77258 179418 4413 0 3 0x8000082 piperd syz-executor 86470 347858 4413 0 3 0x8000082 nanoslp syz-executor 79425 196918 4413 0 2 0x8000482 syz-executor 26327 171421 4413 0 2 0x8000482 syz-executor 42711 371916 4413 0 3 0x8000082 nanoslp syz-executor 127 344534 0 0 3 0x14200 acct acct 76422 201924 0 0 3 0x14200 bored sosplice 4413 70716 59660 0 2 0x8000002 syz-executor 59660 354004 94777 0 3 0x810008a sigsusp ksh 94777 63068 65473 0 3 0x18000098 kqread sshd-session 65473 354325 16129 0 3 0x18000092 kqread sshd-session 13039 339336 1 0 3 0x18100083 ttyin getty 16129 143540 1 0 3 0x18000088 kqread sshd 80676 195808 30581 74 3 0x19100092 bpf pflogd 30581 411525 1 0 3 0x18000080 sbwait pflogd 78958 162593 2279 73 3 0x19100010 biowait syslogd 2279 372297 1 0 3 0x18100082 sbwait syslogd 21673 152510 1 0 3 0x18100080 kqread resolvd 64352 342675 1001 77 3 0x18100092 kqread dhcpleased 73650 480394 1001 77 3 0x18100092 kqread dhcpleased 1001 395325 1 0 3 0x18000080 kqread dhcpleased 26730 376870 0 0 3 0x14200 bored smr 18872 136611 0 0 2 0x14200 zerothread 18734 405284 0 0 3 0x14200 aiodoned aiodoned 83196 266739 0 0 3 0x14200 syncer update 96238 176865 0 0 3 0x14200 cleaner cleaner 28885 511999 0 0 7 0x14200 reaper 11570 455610 0 0 3 0x14200 pgdaemon pagedaemon 90115 442554 0 0 3 0x14200 bored viomb 69503 395982 0 0 3 0x40014200 acpi0 acpi0 55731 102447 0 0 3 0x40014200 idle1 78660 5782 0 0 3 0x14200 bored softnet3 93267 247990 0 0 3 0x14200 bored softnet2 97220 104091 0 0 3 0x14200 bored softnet1 64450 61377 0 0 2 0x14200 softnet0 13187 254897 0 0 3 0x14200 bored systqmp 77115 413469 0 0 3 0x14200 bored systq 8534 130713 0 0 3 0x14200 tmoslp softclockmp 57920 247624 0 0 3 0x40014200 tmoslp softclock 80742 98575 0 0 3 0x40014200 idle0 1 18455 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 21716 (syz-executor) thread 0xffff8000fffe67d8 (83439) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff834f5130) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 unp_connect+0x26c sys/kern/uipc_usrreq.c:862 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 #3 sosend+0xa43 #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:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff800010fde740) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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:611 #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:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 78958 (syslogd) thread 0xffff8000ffffdbe8 (162593) exclusive rrwlock inode r = 0 (0xfffffd806e4a31b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2931 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10404 11414K 11430K 166960K 12482 0 pcb 18 15K 17K 166960K 170 0 rtable 234 7K 7K 166960K 1636 0 pf 32 9K 10K 166960K 137 0 ifaddr 45 15K 16K 166960K 215 0 ifgroup 55 2K 2K 166960K 237 0 sysctl 1 0K 0K 166960K 1 0 counters 64 36K 36K 166960K 154 0 ioctlops 0 0K 4K 166960K 1536 0 iov 0 0K 20K 166960K 91 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1503 95K 95K 166960K 2377 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 93K 166960K 1078 0 sigio 0 0K 0K 166960K 6 0 proc 70 91K 128K 166960K 1668 0 subproc 104 6K 6K 166960K 611 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 53 0 in_multi 99 7K 7K 166960K 553 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 915 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 89K 125K 166960K 9305 0 UVM aobj 91 4K 4K 166960K 92 0 pinsyscall 42 84K 106K 166960K 3160 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 22 1K 2K 166960K 151 0 temp 49 6809K 6875K 166960K 18427 0 kqueue 13 20K 26K 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 120 147 0 143 1 0 1 1 0 8 0 rtentry 112 554 0 447 5 1 4 4 0 8 0 unpcb 144 548 0 526 7 6 1 6 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 237 0 233 8 7 1 8 0 8 0 arp 120 99 0 81 1 0 1 1 0 8 0 inpcb 384 1051 0 1041 28 26 2 15 0 8 0 nd6 136 144 0 121 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 2 0 1 0 8 0 kcovpl 48 47 0 39 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 2 1 0 1 1 0 482 0 pffrnode 88 4 0 2 1 0 1 1 0 8 0 pffrent 40 5 0 2 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 87 0 64 1 0 1 1 0 8 0 pfstkey 128 87 0 64 2 0 2 2 0 8 0 pfstate 376 87 0 64 5 2 3 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2207 0 1753 29 0 29 29 0 8 0 art_table 32 2208 0 1753 4 0 4 4 0 8 0 art_node 16 552 0 455 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 89 0 1 3 0 3 3 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2304 0 721 99 0 99 99 0 8 0 ffsino 272 2304 0 721 106 0 106 106 0 8 0 nchpl 144 3072 0 1330 65 0 65 65 0 8 0 uvmvnodes 80 3302 0 0 68 0 68 68 0 8 0 vnodes 216 3302 0 0 184 0 184 184 0 8 0 namei 1024 14661 0 14660 5 4 1 2 0 8 0 percpumem 16 91 0 45 1 0 1 1 0 8 0 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 696 3 0 2 1 0 1 1 0 8 0 kstatmem 264 114 0 90 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 23571 0 23570 12 11 1 8 1 8 0 plimitpl 152 305 0 288 1 0 1 1 0 8 0 sigapl 424 1320 0 1268 10 3 7 8 0 8 0 futexpl 64 7047 0 7040 6 5 1 1 0 8 0 knotepl 120 373 0 0 10 0 10 10 0 8 0 kqueuepl 216 148 0 137 1 0 1 1 0 8 0 pipepl 320 365 0 337 6 3 3 6 0 8 0 fdescpl 496 1280 0 1249 8 3 5 5 0 8 0 filepl 152 6980 0 6656 29 16 13 18 0 8 0 lockfpl 104 154 0 152 1 0 1 1 0 8 0 lockfspl 48 74 0 72 1 0 1 1 0 8 0 sessionpl 144 61 0 52 1 0 1 1 0 8 0 pgrppl 48 112 0 95 1 0 1 1 0 8 0 ucredpl 104 770 0 754 1 0 1 1 0 8 0 zombiepl 144 1269 0 1268 1 0 1 1 0 8 0 processpl 1152 1320 0 1268 6 2 4 6 0 8 0 procpl 648 2005 0 1943 10 4 6 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 5 0 5 2 2 0 1 0 8 0 sockpl 664 1760 0 1724 29 25 4 14 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 225 0 0 29 0 29 29 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 389 0 0 21 0 21 21 0 8 0 bufpl 280 7429 0 789 475 0 475 475 0 8 0 anonpl 24 244407 0 240963 79 4 75 75 0 185 48 amapchunkpl 152 29611 0 29122 45 3 42 42 0 158 20 amappl16 200 4844 0 4834 27 17 10 14 0 8 8 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 201 0 189 1 0 1 1 0 8 0 amappl13 176 34 0 34 1 1 0 1 0 8 0 amappl12 168 2538 0 2507 4 2 2 3 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 41 0 41 1 1 0 1 0 8 0 amappl9 144 162 0 162 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 202 0 188 1 0 1 1 0 8 0 amappl6 120 559 0 557 1 0 1 1 0 8 0 amappl5 112 291 0 279 1 0 1 1 0 8 0 amappl4 104 433 0 412 1 0 1 1 0 8 0 amappl3 96 5450 0 5337 5 1 4 4 0 8 1 amappl2 88 1155 0 1088 2 0 2 2 0 8 0 amappl1 80 12894 0 12282 18 4 14 15 0 8 0 amappl 88 8639 0 8468 6 1 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 91 0 1 2 0 2 2 0 8 0 uaddrrnd 24 1283 0 1251 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1283 0 1251 1 0 1 1 0 8 0 vmmpekpl 168 12775 0 12731 3 0 3 3 0 8 0 vmmpepl 168 86468 0 84597 105 12 93 96 0 357 4 vmsppl 440 1282 0 1250 6 2 4 5 0 8 0 rwobjpl 56 31074 0 26702 64 0 64 64 0 8 1 pdppl 4096 2573 0 2501 161 83 78 85 0 8 6 pvpl 32 31636 0 0 255 1 254 254 0 265 0 pmappl 248 1282 0 1250 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 471 0 99 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(fffffd80709df2b8,9,0) at witness_checkorder+0x1024 rw_enter(fffffd80709df2a8,1) at rw_enter+0x122 rrw_enter(fffffd80709df2a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80730b8db8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80730b8db8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800033da1f88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800033da1f88) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fde598,fffffd807e44b300,ffff8000fffe67d8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:862 uipc_dgram_send(ffff800010fde598,fffffd8073075200,fffffd807e44b300,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 sosend(ffff800010fde598,fffffd807e44b300,ffff800033da2218,0,0,0) at sosend+0xa43 sendit(ffff8000fffe67d8,3,ffff800033da2390,0,ffff800033da2450) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000fffe67d8,ffff800033da2500,ffff800033da2450) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800033da2500) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800033da2500) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcbfb99555b0, 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 __mp_lock(ffffffff834f4f28) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x192 sys/kern/kern_lock.c:144 uvm_unmap_detach(ffff800029fe53c0,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371 uvm_map_teardown(fffffd80689d3c10) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540 uvmspace_free(fffffd80689d3c10) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: -8