witness: lock order reversal: 1st 0xffff80000134bbc0 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806be96700 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(fffffd806be96700,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806be966f0,1) at rw_enter+0x122 rrw_enter(fffffd806be966f0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80682b26c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80682b26c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002a148098) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002a148098) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000134ba18,fffffd805e12bc00,ffff80002a03e2a8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000134ba18,fffffd8060203900,fffffd805e12bc00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000134ba18,fffffd805e12bc00,ffff80002a148328,0,0,8) at sosend+0xa40 sendit(ffff80002a03e2a8,5,ffff80002a1484a0,8,ffff80002a148560) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff80002a03e2a8,ffff80002a148610,ffff80002a148560) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff80002a148610) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a148610) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38aba139a80, count: -15 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80002a147cf0 rbx 0xfffffd80042c75f8 rdx 0xffff8000012a1500 rcx 0xffff80002a03e2a8 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80002a147bd0 r9 0x8080808080808080 r10 0xa6bdf64d655d176a r11 0x7be5477d4bb611ec r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81ac00e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a147ce0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=109181 pid=74066 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=0xffff80002a03e530,0xffff80002a03f980 process=0xffff8000371ba8e8 user=0xffff80002a143000, vmspace=0xfffffd8069f81aa8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74066 96974 78961 0 2 0 syz-executor *74066 109181 78961 0 7 0x4000000 syz-executor 29995 436119 25235 0 2 0 syz-executor 29995 224395 25235 0 3 0x4000080 fsleep syz-executor 15180 513576 20969 0 2 0 syz-executor 15180 173508 20969 0 3 0x4000080 fsleep syz-executor 15180 424739 20969 0 3 0x4000080 fsleep syz-executor 51278 146307 32335 0 2 0 syz-executor 51278 56966 32335 0 3 0x4000000 biowait syz-executor 91455 66762 53384 0 2 0 syz-executor 91455 500319 53384 0 3 0x4000080 fsleep syz-executor 14018 98178 29589 0 2 0 syz-executor 14018 171534 29589 0 3 0x4000080 fsleep syz-executor 62625 420018 30609 0 2 0 syz-executor 62625 500717 30609 0 3 0x4000080 ttyout syz-executor 93804 451462 50732 0 3 0x80 nanoslp syz-executor 93804 471401 50732 0 3 0x4000080 fsleep syz-executor 93804 299483 50732 0 3 0x4000080 lockf syz-executor 93804 149318 50732 0 3 0x4000080 fsleep syz-executor 63143 288302 1 0 3 0x80 nanoslp init 30609 491553 24805 0 3 0x82 nanoslp syz-executor 43154 438294 0 0 3 0x14200 bored sosplice 25235 451337 24805 0 3 0x82 nanoslp syz-executor 78961 334724 24805 0 3 0x82 nanoslp syz-executor 53384 319361 24805 0 7 0x3 syz-executor 29589 225332 24805 0 2 0x2 syz-executor 50732 461316 24805 0 3 0x82 nanoslp syz-executor 20969 276762 24805 0 3 0x82 nanoslp syz-executor 32335 429598 24805 0 3 0x82 nanoslp syz-executor 24805 360864 94822 0 2 0x2 syz-executor 94822 135231 50409 0 3 0x10008a sigsusp ksh 50409 421919 17991 0 3 0x98 kqread sshd-session 17991 248393 2974 0 3 0x92 kqread sshd-session 2974 101037 1 0 3 0x88 kqread sshd 63170 62919 77722 74 3 0x1100092 bpf pflogd 77722 428413 1 0 3 0x80 sbwait pflogd 15057 278344 28598 73 3 0x1100090 kqread syslogd 28598 482802 1 0 3 0x100082 sbwait syslogd 22797 487121 1 0 3 0x100080 kqread resolvd 2433 496824 35382 77 3 0x100092 kqread dhcpleased 63786 202706 35382 77 3 0x100092 kqread dhcpleased 35382 252929 1 0 3 0x80 kqread dhcpleased 73088 46920 0 0 3 0x14200 bored smr 68806 364242 0 0 2 0x14200 zerothread 25373 201899 0 0 3 0x14200 aiodoned aiodoned 54582 377117 0 0 3 0x14200 syncer update 9887 387242 0 0 3 0x14200 cleaner cleaner 35067 424777 0 0 3 0x14200 reaper reaper 58356 219689 0 0 3 0x14200 pgdaemon pagedaemon 94229 434382 0 0 3 0x14200 bored viomb 43400 391106 0 0 3 0x40014200 acpi0 acpi0 26709 93421 0 0 3 0x40014200 idle1 43481 341431 0 0 3 0x14200 bored softnet3 77981 283241 0 0 3 0x14200 bored softnet2 31952 5844 0 0 3 0x14200 bored softnet1 40459 32209 0 0 3 0x14200 bored softnet0 37850 282577 0 0 3 0x14200 bored systqmp 25076 429223 0 0 3 0x14200 bored systq 25431 333006 0 0 3 0x14200 tmoslp softclockmp 34036 413105 0 0 3 0x40014200 tmoslp softclock 58371 63027 0 0 3 0x40014200 idle0 1 57800 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 74066 (syz-executor) thread 0xffff80002a03e2a8 (109181) 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 unp_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0xa40 #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 exclusive rwlock sbufsnd r = 0 (0xffff80000134bbc0) #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 51278 (syz-executor) thread 0xffff80002a03f970 (56966) exclusive rrwlock inode r = 0 (0xfffffd806be96a30) #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 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #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_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xff sys/kern/vfs_vops.c:103 #10 vn_open+0x491 sys/kern/vfs_vnops.c:116 #11 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f1fab40) #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 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 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f4 sys/kern/vfs_vnops.c:107 #8 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #9 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #9 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 11276K 11528K 166960K 12740 0 pcb 84 18K 18K 166960K 290 0 rtable 234 8K 8K 166960K 583 0 pf 36 17K 19K 166960K 94 0 ifaddr 45 8K 8K 166960K 72 0 ifgroup 59 2K 2K 166960K 113 0 sysctl 3 0K 0K 166960K 3 0 counters 66 36K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1556 0 iov 0 0K 16K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1488 94K 94K 166960K 2370 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 1170 0 sigio 0 0K 0K 166960K 22 0 proc 63 79K 140K 166960K 705 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 261 0 in_multi 99 7K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 644 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 74K 88K 166960K 12667 0 UVM aobj 36 4K 4K 166960K 39 0 pinsyscall 42 84K 104K 166960K 2317 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 65 0 NDP 13 0K 2K 166960K 49 0 temp 76 6828K 7083K 166960K 63571 0 kqueue 13 20K 30K 166960K 218 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 120 109 0 106 1 0 1 1 0 8 0 rtentry 112 145 0 38 4 0 4 4 0 8 0 unpcb 144 708 0 689 4 1 3 3 0 8 2 syncache 336 12 0 12 3 3 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 261 0 254 2 0 2 2 0 8 1 arp 120 26 0 5 1 0 1 1 0 8 0 inpcb 336 1388 0 1309 7 0 7 7 0 8 0 nd6 136 31 0 4 1 0 1 1 0 8 0 pkpcb 40 13 0 13 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 9 0 9 3 2 1 1 0 8 1 pffrag 232 6 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 3 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 22 1 0 1 1 0 8 0 pfstkey 128 87 0 22 3 0 3 3 0 8 0 pfstate 376 87 0 22 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 571 0 149 31 4 27 29 0 8 0 art_table 32 573 0 149 4 0 4 4 0 8 0 art_node 16 142 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 79 0 74 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 47 0 37 1 0 1 1 0 8 0 shmpl 112 36 0 3 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3563 0 2058 95 0 95 95 0 8 0 ffsino 272 3563 0 2058 101 0 101 101 0 8 0 nchpl 144 5417 0 4874 63 39 24 63 0 8 0 uvmvnodes 80 4237 0 0 87 0 87 87 0 8 0 vnodes 216 4237 0 0 236 0 236 236 0 8 0 namei 1024 18387 0 18385 2 1 1 2 0 8 0 percpumem 16 64 0 17 1 0 1 1 0 8 0 kstatmem 264 60 0 34 3 1 2 3 0 8 0 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 15134 0 15133 11 9 2 8 1 8 1 plimitpl 152 310 0 293 1 0 1 1 0 8 0 sigapl 424 1502 0 1451 10 3 7 9 0 8 0 futexpl 64 16311 0 16304 1 0 1 1 0 8 0 knotepl 120 556 0 0 17 0 17 17 0 8 0 kqueuepl 216 423 0 414 7 6 1 5 0 8 0 pipepl 320 286 0 259 5 0 5 5 0 8 2 fdescpl 496 1460 0 1428 5 0 5 5 0 8 0 filepl 152 9569 0 9250 16 2 14 16 0 8 1 lockfpl 104 591 0 587 2 1 1 2 0 8 0 lockfspl 48 157 0 154 1 0 1 1 0 8 0 sessionpl 144 33 0 25 1 0 1 1 0 8 0 pgrppl 48 56 0 40 1 0 1 1 0 8 0 ucredpl 104 1971 0 1958 1 0 1 1 0 8 0 zombiepl 144 1451 0 1451 1 0 1 1 0 8 1 processpl 1160 1502 0 1451 7 3 4 6 0 8 0 procpl 648 3232 0 3170 8 2 6 8 0 8 0 srpgc 96 5 0 5 3 3 0 1 0 8 0 sosppl 168 10 0 10 1 1 0 1 0 8 0 sockpl 664 2237 0 2137 11 2 9 9 0 8 0 mcl64k 65536 4 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 144 0 0 18 0 18 18 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 324 0 0 20 0 20 20 0 8 0 bufpl 280 5490 0 99 386 0 386 386 0 8 0 anonpl 24 261318 0 255668 71 12 59 59 0 185 13 amapchunkpl 152 41998 0 41359 35 3 32 33 0 158 6 amappl16 200 6548 0 6478 42 26 16 16 0 8 7 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 140 0 129 1 0 1 1 0 8 0 amappl13 176 13 0 13 3 2 1 1 0 8 1 amappl12 168 2130 0 2098 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 172 0 172 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 124 0 113 1 0 1 1 0 8 0 amappl6 120 179 0 177 1 0 1 1 0 8 0 amappl5 112 161 0 148 1 0 1 1 0 8 0 amappl4 104 359 0 339 1 0 1 1 0 8 0 amappl3 96 7612 0 7510 3 0 3 3 0 8 0 amappl2 88 1824 0 1741 4 1 3 3 0 8 0 amappl1 80 13094 0 12548 15 1 14 15 0 8 0 amappl 88 12164 0 11969 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 128 255 0 255 3 3 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 3 1 0 1 1 0 8 0 uaddrrnd 24 1460 0 1428 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1460 0 1428 1 0 1 1 0 8 0 vmmpekpl 168 13651 0 13608 3 0 3 3 0 8 0 vmmpepl 168 98343 0 96403 106 11 95 97 0 357 1 vmsppl 448 1459 0 1428 6 2 4 5 0 8 0 rwobjpl 56 34176 0 28941 78 2 76 76 0 8 0 pdppl 4096 2927 0 2856 123 52 71 87 0 8 0 pvpl 32 15530 0 0 125 0 125 125 0 265 0 pmappl 248 1459 0 1428 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 426 0 66 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(fffffd806be96700,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806be966f0,1) at rw_enter+0x122 rrw_enter(fffffd806be966f0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80682b26c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80682b26c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002a148098) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002a148098) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff80000134ba18,fffffd805e12bc00,ffff80002a03e2a8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff80000134ba18,fffffd8060203900,fffffd805e12bc00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff80000134ba18,fffffd805e12bc00,ffff80002a148328,0,0,8) at sosend+0xa40 sendit(ffff80002a03e2a8,5,ffff80002a1484a0,8,ffff80002a148560) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff80002a03e2a8,ffff80002a148610,ffff80002a148560) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff80002a148610) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a148610) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38aba139a80, 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 ktrstruct(ffff80002a0416e0,ffffffff8300a617,ffff80002a1145f0,10) at ktrstruct+0xe2 sys/kern/kern_ktrace.c:307 sys_nanosleep(ffff80002a0416e0,ffff80002a114730,ffff80002a114680) at sys_nanosleep+0x109 sys/kern/kern_time.c:294 syscall(ffff80002a114730) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a114730) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79ab157b61f0, count: -8