login: witness: lock order reversal: 1st 0xffff8000012f6a48 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806e5c1410 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8312c38c -> 0xffffffff830d64b2 is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:537 #2 soreceive+0x28e sys/kern/uipc_socket.c:876 #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+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x5c3 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 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_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:537 #2 sosplice+0x40d sys/kern/uipc_socket.c:1358 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1221 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 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(fffffd806e5c1410,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806e5c13f8,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806e5c13f8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd807c422448,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd807c422448,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c59c548) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c59c548) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012f6888,fffffd80689ff400,ffff8000ffff7468) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012f6888,fffffd80683da400,fffffd80689ff400,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012f6888,fffffd80689ff400,ffff80003c59c7c8,0,0,0) at sosend+0x804 sendit(ffff8000ffff7468,3,ffff80003c59c940,0,ffff80003c59ca00) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffff7468,ffff80003c59cab0,ffff80003c59ca00) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c59cab0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c59cab0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xba5192c53d0, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c59c1c0 rbx 0xfffffd800433c130 rdx 0xffff80000129d240 rcx 0xffff8000ffff7468 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c59c0a0 r9 0x8080808080808080 r10 0x5dbd176043fd9b1e r11 0xa44a0241ba51bde r12 0 r13 0xfffffd8003b53f00 r14 0x3 r15 0xffffffff rip 0xffffffff8239cdf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c59c1b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=489601 pid=75828 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=0xffff8000ffff7978,0xffff8000ffff7c10 process=0xffff80003c59fdc0 user=0xffff80003c597000, vmspace=0xfffffd80691e2910 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16533 366579 76808 0 2 0 syz-executor 75828 61720 86046 0 7 0 syz-executor *75828 489601 86046 0 7 0x4000000 syz-executor 79384 158718 31883 0 2 0 syz-executor 79384 170506 31883 0 2 0x4000000 syz-executor 16684 454209 9799 0 2 0 syz-executor 16684 389534 9799 0 3 0x4000080 fsleep syz-executor 82185 327120 405 0 3 0x80 nanoslp syz-executor 82185 11509 405 0 3 0x4000080 fifor syz-executor 82185 34199 405 0 3 0x4000080 fsleep syz-executor 85948 152649 20940 0 3 0x80 nanoslp syz-executor 85948 332069 20940 0 3 0x4000080 kqsel syz-executor 85948 137684 20940 0 3 0x4000080 fsleep syz-executor 11930 463550 59804 0 3 0x80 nanoslp syz-executor 11930 35897 59804 0 3 0x4000080 lockf syz-executor 11930 320818 59804 0 3 0x4000080 fsleep syz-executor 63738 139410 1 0 3 0x100083 ttyin getty 9799 486074 27371 0 3 0x82 nanoslp syz-executor 76808 290574 27371 0 3 0x82 nanoslp syz-executor 89229 83576 0 0 3 0x14200 acct acct 19338 264400 0 0 3 0x14200 bored sosplice 23091 158031 27371 0 3 0x2 biowait syz-executor 59804 453356 27371 0 3 0x82 nanoslp syz-executor 31883 501316 27371 0 3 0x82 nanoslp syz-executor 20940 313337 27371 0 3 0x82 nanoslp syz-executor 86046 516531 27371 0 3 0x82 nanoslp syz-executor 405 131950 27371 0 3 0x82 nanoslp syz-executor 27371 391839 51579 0 3 0x82 kqread syz-executor 51579 145406 79614 0 3 0x10008a sigsusp ksh 79614 127410 69111 0 3 0x98 kqread sshd-session 69111 149363 33838 0 3 0x92 kqread sshd-session 33838 386668 1 0 3 0x88 kqread sshd 45648 425941 46241 74 3 0x1100092 bpf pflogd 46241 423246 1 0 3 0x80 sbwait pflogd 79474 360857 47485 73 3 0x1100090 kqread syslogd 47485 49726 1 0 3 0x100082 sbwait syslogd 46934 140906 1 0 3 0x100080 kqread resolvd 86693 479454 6807 77 3 0x100092 kqread dhcpleased 73301 90770 6807 77 3 0x100092 kqread dhcpleased 6807 11799 1 0 3 0x80 kqread dhcpleased 23996 219365 0 0 3 0x14200 bored smr 47592 498399 0 0 2 0x14200 zerothread 23286 498542 0 0 3 0x14200 aiodoned aiodoned 42994 99106 0 0 3 0x14200 syncer update 33705 359053 0 0 3 0x14200 cleaner cleaner 87052 92416 0 0 3 0x14200 reaper reaper 33382 323298 0 0 3 0x14200 pgdaemon pagedaemon 87707 435869 0 0 3 0x14200 bored viomb 73 427658 0 0 3 0x40014200 acpi0 acpi0 44705 329464 0 0 3 0x40014200 idle1 31313 398941 0 0 3 0x14200 bored softnet3 28013 393443 0 0 3 0x14200 bored softnet2 9414 230005 0 0 3 0x14200 bored softnet1 83705 44706 0 0 3 0x14200 bored softnet0 40976 88221 0 0 3 0x14200 bored systqmp 1348 450074 0 0 3 0x14200 bored systq 68634 201131 0 0 3 0x14200 tmoslp softclockmp 40774 183574 0 0 3 0x40014200 tmoslp softclock 97319 380043 0 0 3 0x40014200 idle0 1 306967 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 75828 (syz-executor) thread 0xffff8000ffff7468 (489601) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836710f8) #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+0x804 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000012f6a48) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sblock+0xb7 sys/kern/uipc_socket2.c:537 #3 sosend+0x2e2 sys/kern/uipc_socket.c:625 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 23091 (syz-executor) thread 0xffff8000ffffd958 (158031) exclusive rrwlock inode r = 0 (0xfffffd806deb6628) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3102 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c43bab0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11166K 11427K 166960K 12650 0 pcb 18 15K 16K 166960K 321 0 rtable 230 8K 8K 166960K 495 0 pf 36 18K 20K 166960K 84 0 ifaddr 41 7K 7K 166960K 68 0 ifgroup 55 2K 2K 166960K 94 0 sysctl 3 1K 1K 166960K 9 0 counters 64 36K 36K 166960K 88 0 ioctlops 0 0K 4K 166960K 1577 0 iov 0 0K 16K 166960K 247 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 91K 91K 166960K 2217 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 30 5K 6K 166960K 145 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 1290 0 sigio 0 0K 0K 166960K 14 0 proc 72 91K 128K 166960K 756 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 262 0 in_multi 97 7K 7K 166960K 175 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 652 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 230 73K 77K 166960K 13571 0 UVM aobj 34 5K 5K 166960K 35 0 pinsyscall 42 84K 104K 166960K 2477 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 86 0 NDP 12 0K 2K 166960K 47 0 temp 77 6900K 7016K 166960K 53165 0 kqueue 14 22K 31K 166960K 217 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 96 0 93 1 0 1 1 0 8 0 rtentry 112 155 0 50 4 0 4 4 0 8 0 unpcb 144 1088 0 1063 8 2 6 6 0 8 5 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 491 0 484 6 2 4 4 0 8 2 arp 120 29 0 15 1 0 1 1 0 8 0 inpcb 376 1919 0 1903 15 5 10 11 0 8 7 nd6 136 32 0 6 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 2 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 6 0 6 2 1 1 1 0 8 1 pfstscr 40 2 0 2 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 12 0 6 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 86 0 19 1 0 1 1 0 8 0 pfstkey 128 87 0 20 3 0 3 3 0 8 0 pfstate 376 86 0 20 7 0 7 7 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 601 0 144 33 3 30 31 0 8 0 art_table 32 603 0 144 4 0 4 4 0 8 0 art_node 16 154 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 2 1 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 137 0 109 1 0 1 1 0 8 0 shmpl 112 32 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3687 0 2182 95 0 95 95 0 8 0 ffsino 280 3687 0 2182 109 0 109 109 0 8 0 nchpl 144 5594 0 3903 64 0 64 64 0 8 0 uvmvnodes 80 4264 0 0 88 0 88 88 0 8 0 vnodes 216 4264 0 0 237 0 237 237 0 8 0 namei 1024 19411 0 19409 1 0 1 1 0 8 0 percpumem 16 58 0 12 1 0 1 1 0 8 0 kstatmem 264 48 0 24 2 0 2 2 0 8 0 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 15920 0 15919 10 8 2 8 1 8 1 plimitpl 152 241 0 224 1 0 1 1 0 8 0 sigapl 424 1600 0 1549 8 1 7 7 0 8 0 futexpl 64 18120 0 18116 1 0 1 1 0 8 0 knotepl 120 607 0 0 19 0 19 19 0 8 0 kqueuepl 216 415 0 404 4 1 3 3 0 8 2 pipepl 328 231 0 204 6 1 5 6 0 8 2 fdescpl 504 1578 0 1547 5 0 5 5 0 8 0 filepl 152 10411 0 10180 17 1 16 16 0 8 4 lockfpl 104 549 0 545 2 1 1 2 0 8 0 lockfspl 48 170 0 167 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 1547 0 1534 1 0 1 1 0 8 0 zombiepl 144 1549 0 1549 1 0 1 1 0 8 1 processpl 1168 1600 0 1549 5 1 4 5 0 8 0 procpl 648 3478 0 3418 6 0 6 6 0 8 0 srpgc 96 4 0 4 1 1 0 1 0 8 0 sosppl 168 13 0 13 2 1 1 1 0 8 1 sockpl 688 3189 0 3145 17 1 16 16 0 8 10 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 82 0 0 2 0 2 2 0 8 0 mbufpl 256 1262 0 0 79 0 79 79 0 8 0 bufpl 280 4559 0 139 316 0 316 316 0 8 0 anonpl 24 205084 0 199698 88 5 83 83 0 185 36 amapchunkpl 152 43257 0 42679 37 7 30 34 0 158 5 amappl16 200 3670 0 3595 38 21 17 30 0 8 9 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 4 0 4 2 2 0 1 0 8 0 amappl12 168 2259 0 2229 3 1 2 2 0 8 0 amappl11 160 74 0 60 1 0 1 1 0 8 0 amappl10 152 27 0 27 1 1 0 1 0 8 0 amappl9 144 256 0 255 1 0 1 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 137 0 125 1 0 1 1 0 8 0 amappl6 120 204 0 200 1 0 1 1 0 8 0 amappl5 112 157 0 147 1 0 1 1 0 8 0 amappl4 104 355 0 335 1 0 1 1 0 8 0 amappl3 96 8942 0 8831 5 1 4 4 0 8 0 amappl2 88 761 0 698 2 0 2 2 0 8 0 amappl1 80 13658 0 13087 15 0 15 15 0 8 0 amappl 88 13063 0 12890 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 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 128 254 0 254 2 1 1 1 0 8 1 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 34 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1578 0 1547 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1578 0 1547 1 0 1 1 0 8 0 vmmpekpl 168 14595 0 14552 3 0 3 3 0 8 0 vmmpepl 168 101774 0 99855 109 2 107 107 0 357 11 vmsppl 456 1577 0 1547 6 1 5 5 0 8 0 rwobjpl 64 32529 0 27245 89 0 89 89 0 8 1 pdppl 4096 3163 0 3094 111 36 75 85 0 8 6 pvpl 32 21373 0 0 173 0 173 173 0 265 0 pmappl 248 1577 0 1547 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 370 0 47 10 0 10 10 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(fffffd806e5c1410,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806e5c13f8,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806e5c13f8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd807c422448,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd807c422448,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c59c548) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c59c548) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012f6888,fffffd80689ff400,ffff8000ffff7468) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012f6888,fffffd80683da400,fffffd80689ff400,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012f6888,fffffd80689ff400,ffff80003c59c7c8,0,0,0) at sosend+0x804 sendit(ffff8000ffff7468,3,ffff80003c59c940,0,ffff80003c59ca00) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffff7468,ffff80003c59cab0,ffff80003c59ca00) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c59cab0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c59cab0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xba5192c53d0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b5bff0) 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(ffffffff83670ef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83670ef0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003897e8a0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003897e8a0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75ccb4051870, count: -6