witness: lock order reversal: 1st 0xffff800001253e38 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806bc0bc50 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830bd238 -> 0xffffffff8306e212 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(fffffd806bc0bc50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bc0bc40,1) at rw_enter+0x122 rrw_enter(fffffd806bc0bc40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805e87d538,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e87d538,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371d3118) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371d3118) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001253c90,fffffd806cd01400,ffff8000371d7c10) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001253c90,fffffd8070fd4700,fffffd806cd01400,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001253c90,fffffd806cd01400,ffff8000371d33a8,0,0,8) at sosend+0xa40 sendit(ffff8000371d7c10,3,ffff8000371d3520,8,ffff8000371d35e0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371d7c10,ffff8000371d3690,ffff8000371d35e0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371d3690) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d3690) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa0fceb69bf0, count: -15 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371d2d70 rbx 0xfffffd80042c6690 rdx 0xffff8000012a73c0 rcx 0xffff8000371d7c10 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371d2c50 r9 0x8080808080808080 r10 0x19cf5fc70e2a9dac r11 0x59bd56fc99fed08d r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81ac00e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371d2d60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=234389 pid=78012 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371d7700,0xffff8000371d6048 process=0xffff8000371da440 user=0xffff8000371ce000, vmspace=0xfffffd806c8841d8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57561 32846 68301 0 2 0 syz-executor 25123 96757 81115 0 2 0 syz-executor 25123 47699 81115 0 3 0x4000080 fsleep syz-executor 78012 337684 908 0 2 0 syz-executor *78012 234389 908 0 7 0x4000000 syz-executor 22602 240782 94429 0 2 0x10 syz-executor 22602 127303 94429 0 2 0x4000010 syz-executor 22602 207092 94429 0 3 0x4000090 fsleep syz-executor 82340 162183 18330 0 2 0 syz-executor 82340 10610 18330 0 3 0x4000080 netcon syz-executor 49068 226206 24531 0 7 0 syz-executor 49068 292562 24531 0 3 0x4000080 fsleep syz-executor 93307 28916 25187 0 2 0 syz-executor 93307 211735 25187 0 3 0x4000080 rest syz-executor 93307 155624 25187 0 2 0x4000000 syz-executor 93307 365620 25187 0 3 0x4000080 fsleep syz-executor 24531 356979 40982 0 3 0x82 nanoslp syz-executor 11930 153514 1 0 3 0x100083 ttyin getty 16597 508754 0 0 3 0x14200 bored sosplice 27058 83096 0 0 3 0x14280 nfsidl nfsio 62887 125870 0 0 3 0x14280 nfsidl nfsio 7171 348798 0 0 3 0x14280 nfsidl nfsio 84925 355310 0 0 3 0x14280 nfsidl nfsio 622 369909 0 0 3 0x14280 nfsidl nfsio 34649 256381 0 0 3 0x14280 nfsidl nfsio 11581 469192 0 0 3 0x14280 nfsidl nfsio 19286 484539 0 0 3 0x14280 nfsidl nfsio 15485 401961 0 0 3 0x14280 nfsidl nfsio 81988 504389 0 0 3 0x14280 nfsidl nfsio 60928 490162 0 0 3 0x14280 nfsidl nfsio 59264 33128 0 0 3 0x14280 nfsidl nfsio 98897 286343 0 0 3 0x14280 nfsidl nfsio 17295 477940 0 0 3 0x14280 nfsidl nfsio 22092 364181 0 0 3 0x14280 nfsidl nfsio 69459 234305 0 0 3 0x14280 nfsidl nfsio 67606 510904 0 0 3 0x14280 nfsidl nfsio 29814 443936 0 0 3 0x14280 nfsidl nfsio 79612 161778 0 0 3 0x14280 nfsidl nfsio 36021 264041 0 0 3 0x14280 nfsidl nfsio 68301 467163 40982 0 3 0x82 nanoslp syz-executor 81115 55478 40982 0 3 0x82 nanoslp syz-executor 908 447414 40982 0 3 0x82 nanoslp syz-executor 18330 266751 40982 0 3 0x82 nanoslp syz-executor 94429 325257 40982 0 3 0x82 nanoslp syz-executor 43465 295634 40982 0 2 0x2 syz-executor 25187 24194 40982 0 3 0x82 nanoslp syz-executor 40982 481169 97122 0 3 0x82 kqread syz-executor 97122 199279 50120 0 3 0x10008a sigsusp ksh 50120 280494 12812 0 3 0x98 kqread sshd-session 12812 104542 3418 0 3 0x92 kqread sshd-session 3418 82702 1 0 3 0x88 kqread sshd 27415 507771 76684 74 3 0x1100092 bpf pflogd 76684 338543 1 0 3 0x80 sbwait pflogd 20276 507341 38139 73 3 0x1100090 kqread syslogd 38139 173522 1 0 3 0x100082 sbwait syslogd 96076 293575 1 0 3 0x100080 kqread resolvd 24757 172127 11915 77 3 0x100092 kqread dhcpleased 16707 321021 11915 77 3 0x100092 kqread dhcpleased 11915 476296 1 0 3 0x80 kqread dhcpleased 49778 317947 0 0 3 0x14200 bored smr 88630 512246 0 0 3 0x14200 pgzero zerothread 44264 111141 0 0 3 0x14200 aiodoned aiodoned 53209 389466 0 0 3 0x14200 syncer update 65210 212111 0 0 3 0x14200 cleaner cleaner 27619 359617 0 0 3 0x14200 reaper reaper 3627 374352 0 0 3 0x14200 pgdaemon pagedaemon 39161 393669 0 0 3 0x14200 bored viomb 5489 121047 0 0 3 0x40014200 acpi0 acpi0 90443 305194 0 0 3 0x40014200 idle1 52739 486133 0 0 3 0x14200 bored softnet3 5921 418892 0 0 3 0x14200 bored softnet2 18347 382008 0 0 3 0x14200 bored softnet1 75044 370165 0 0 3 0x14200 bored softnet0 61595 148728 0 0 3 0x14200 bored systqmp 44246 503298 0 0 3 0x14200 bored systq 17067 259136 0 0 3 0x14200 tmoslp softclockmp 72496 373554 0 0 3 0x40014200 tmoslp softclock 46600 251644 0 0 3 0x40014200 idle0 1 454792 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 78012 (syz-executor) thread 0xffff8000371d7c10 (234389) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835a0b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 pool_get+0x242 sys/kern/subr_pool.c:589 #5 namei+0xdf sys/kern/vfs_lookup.c:145 #6 unp_connect+0x27d sys/kern/uipc_usrreq.c:868 #7 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #8 sosend+0xa40 #9 sendit+0x721 sys/kern/uipc_syscalls.c:786 #10 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #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 exclusive rwlock sbufsnd r = 0 (0xffff800001253e38) #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 Process 22602 (syz-executor) thread 0xffff8000371d7478 (127303) exclusive rwlock futex r = 0 (0xffffffff834f4610) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #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 Process 93307 (syz-executor) thread 0xffff8000371c8538 (155624) exclusive rwlock fdlock r = 0 (0xfffffd80093fb628) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 doopenat+0x173 #2 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 11315K 11577K 166960K 12374 0 pcb 17 12K 12K 166960K 129 0 rtable 228 7K 8K 166960K 485 0 pf 35 17K 25K 166960K 81 0 ifaddr 42 7K 7K 166960K 63 0 ifgroup 55 2K 2K 166960K 83 0 sysctl 3 0K 0K 166960K 5 0 counters 64 36K 36K 166960K 84 0 ioctlops 0 0K 4K 166960K 1708 0 iov 0 0K 16K 166960K 41 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1478 93K 93K 166960K 2234 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 75 0 dirhash 15 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 870 0 sigio 0 0K 0K 166960K 17 0 proc 72 91K 128K 166960K 643 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 77 0 in_multi 96 7K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 1 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 472 0 fusefs mount 1 32K 32K 166960K 1 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 241 73K 78K 166960K 9895 0 UVM aobj 34 4K 4K 166960K 37 0 pinsyscall 42 84K 102K 166960K 1994 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 12 0K 1K 166960K 42 0 temp 78 6828K 6894K 166960K 34868 0 kqueue 14 22K 28K 166960K 143 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 120 190 0 187 3 2 1 3 0 8 0 rtentry 112 147 0 44 3 0 3 3 0 8 0 unpcb 144 639 0 617 7 6 1 4 0 8 0 syncache 336 8 0 8 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 224 0 218 5 3 2 5 0 8 0 arp 120 26 0 7 1 0 1 1 0 8 0 inpcb 336 949 0 938 13 6 7 7 0 8 5 nd6 136 32 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 7 0 7 3 2 1 1 0 8 1 pffrag 232 37 0 33 1 0 1 1 0 482 0 pffrnode 88 37 0 33 1 0 1 1 0 8 0 pffrent 40 72 0 68 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 75 0 22 1 0 1 1 0 8 0 pfstkey 128 75 0 22 2 0 2 2 0 8 0 pfstate 376 73 0 21 6 0 6 6 0 8 0 pfrule 1344 27 0 20 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 597 0 166 31 3 28 30 0 8 0 art_table 32 599 0 166 4 0 4 4 0 8 0 art_node 16 144 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 34 0 3 1 0 1 1 0 8 0 dirhash 1024 32 0 13 3 0 3 3 0 8 0 dino2pl 256 3015 0 1515 95 0 95 95 0 8 0 ffsino 272 3015 0 1515 101 0 101 101 0 8 0 nchpl 144 4230 0 2540 64 0 64 64 0 8 0 uvmvnodes 80 3617 0 0 74 0 74 74 0 8 0 vnodes 216 3617 0 0 201 0 201 201 0 8 0 namei 1024 13955 0 13954 3 2 1 1 0 8 0 percpumem 16 56 0 10 1 0 1 1 0 8 0 kstatmem 264 44 0 20 2 0 2 2 0 8 0 scsiplug 72 6 0 6 3 3 0 1 0 8 0 scxspl 216 14287 0 14287 10 9 1 8 1 8 1 plimitpl 152 236 0 219 1 0 1 1 0 8 0 sigapl 424 1193 0 1123 9 0 9 9 0 8 0 futexpl 64 11660 0 11655 1 0 1 1 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 216 212 0 202 1 0 1 1 0 8 0 pipepl 320 276 0 249 11 3 8 8 0 8 5 fdescpl 496 1154 0 1123 5 0 5 5 0 8 0 filepl 152 7233 0 6973 21 6 15 15 0 8 4 lockfpl 104 399 0 396 2 1 1 2 0 8 0 lockfspl 48 113 0 110 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 111 0 94 1 0 1 1 0 8 0 ucredpl 104 1363 0 1349 1 0 1 1 0 8 0 zombiepl 144 1171 0 1171 1 0 1 1 0 8 1 processpl 1160 1193 0 1123 6 0 6 6 0 8 0 procpl 648 2443 0 2363 8 0 8 8 0 8 0 srpgc 96 6 0 6 3 3 0 1 0 8 0 sosppl 168 6 0 6 4 3 1 1 0 8 1 sockpl 664 1799 0 1763 21 12 9 9 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 169 0 0 22 0 22 22 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 26 0 0 1 0 1 1 0 8 0 mbufpl 256 1201 0 0 74 0 74 74 0 8 0 bufpl 280 4869 0 99 341 0 341 341 0 8 0 anonpl 24 242022 0 238391 92 60 32 71 0 185 0 amapchunkpl 152 32052 0 31535 34 10 24 28 0 158 1 amappl16 200 6581 0 6552 42 38 4 26 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 13 0 13 3 3 0 1 0 8 0 amappl12 168 1820 0 1789 4 1 3 3 0 8 0 amappl11 160 96 0 82 1 0 1 1 0 8 0 amappl10 152 16 0 16 1 1 0 1 0 8 0 amappl9 144 140 0 140 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 119 0 107 1 0 1 1 0 8 0 amappl6 120 180 0 178 1 0 1 1 0 8 0 amappl5 112 151 0 139 1 0 1 1 0 8 0 amappl4 104 328 0 310 1 0 1 1 0 8 0 amappl3 96 6000 0 5899 3 0 3 3 0 8 0 amappl2 88 1479 0 1395 3 0 3 3 0 8 0 amappl1 80 11058 0 10481 14 0 14 14 0 8 0 amappl 88 9417 0 9239 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 128 254 0 254 2 2 0 1 0 8 0 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 36 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1154 0 1123 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1154 0 1123 1 0 1 1 0 8 0 vmmpekpl 168 11280 0 11234 3 0 3 3 0 8 0 vmmpepl 168 80245 0 78365 112 24 88 104 0 357 0 vmsppl 448 1153 0 1123 6 2 4 5 0 8 0 rwobjpl 56 29817 0 25216 68 2 66 66 0 8 0 pdppl 4096 2315 0 2246 115 44 71 85 0 8 2 pvpl 32 17746 0 0 146 2 144 144 0 265 0 pmappl 248 1153 0 1123 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 484 0 67 12 0 12 12 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(fffffd806bc0bc50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bc0bc40,1) at rw_enter+0x122 rrw_enter(fffffd806bc0bc40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805e87d538,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e87d538,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371d3118) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371d3118) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001253c90,fffffd806cd01400,ffff8000371d7c10) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001253c90,fffffd8070fd4700,fffffd806cd01400,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001253c90,fffffd806cd01400,ffff8000371d33a8,0,0,8) at sosend+0xa40 sendit(ffff8000371d7c10,3,ffff8000371d3520,8,ffff8000371d35e0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371d7c10,ffff8000371d3690,ffff8000371d35e0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371d3690) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d3690) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa0fceb69bf0, 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(ffffffff835a0960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002dd7a990) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002dd7a990) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79fc37918680, count: -6