witness: lock order reversal: 1st 0xffff800001290670 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806f284520 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(fffffd806f284520,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806f284508,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806f284508,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd8063490528,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8063490528,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c5ade58) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c5ade58) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012904b0,fffffd805cdafe00,ffff80002a44ca38) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012904b0,fffffd80680e0d00,fffffd805cdafe00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012904b0,fffffd805cdafe00,ffff80003c5ae0d8,0,0,0) at sosend+0x804 sendit(ffff80002a44ca38,5,ffff80003c5ae250,0,ffff80003c5ae310) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff80002a44ca38,ffff80003c5ae3c0,ffff80003c5ae310) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c5ae3c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5ae3c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4d846496c0, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c5adad0 rbx 0xfffffd800433b4f8 rdx 0xffff80000128da00 rcx 0xffff80002a44ca38 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c5ad9b0 r9 0x8080808080808080 r10 0x6851c44875a7608a r11 0xb5d7bc8dbc9cb4c2 r12 0 r13 0xfffffd8003b53f00 r14 0x3 r15 0xffffffff rip 0xffffffff8239cdf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c5adac0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=57905 pid=32513 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=0xffff80002a44d458,0xffffffff8367c150 process=0xffff80002a5034a0 user=0xffff80003c5a9000, vmspace=0xfffffd807eb8c000 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32513 328608 4246 0 2 0 syz-executor *32513 57905 4246 0 7 0x4000000 syz-executor 18536 151079 89335 -1 2 0x10 syz-executor 18536 307028 89335 -1 3 0x4000090 kqread syz-executor 39066 482797 81474 0 2 0x10 syz-executor 39066 367209 81474 0 3 0x4000090 fsleep syz-executor 85787 94491 28873 0 2 0 syz-executor 85787 482302 28873 0 3 0x4000080 fsleep syz-executor 85787 415493 28873 0 3 0x4000080 fsleep syz-executor 64559 237076 92423 0 2 0 syz-executor 64559 181274 92423 0 3 0x4000080 fsleep syz-executor 64559 73150 92423 0 3 0x4000080 sbwait syz-executor 64559 283022 92423 0 3 0x4000080 fsleep syz-executor 96910 379585 57804 60929 3 0x90 nanoslp syz-executor 96910 386481 57804 60929 3 0x4000090 ttyin syz-executor 62677 437049 5874 0 3 0x82 sbwait sshd-session 81474 492083 10478 0 3 0x82 nanoslp syz-executor 89335 289041 10478 0 3 0x82 nanoslp syz-executor 4246 361281 10478 0 3 0x82 nanoslp syz-executor 57170 79459 0 0 3 0x14280 nfsidl nfsio 41366 102772 0 0 3 0x14280 nfsidl nfsio 30239 441815 0 0 3 0x14280 nfsidl nfsio 35194 271021 0 0 3 0x14280 nfsidl nfsio 10281 234694 0 0 3 0x14280 nfsidl nfsio 64845 380112 0 0 3 0x14280 nfsidl nfsio 90538 264997 0 0 3 0x14280 nfsidl nfsio 10090 40184 0 0 3 0x14280 nfsidl nfsio 61256 43141 0 0 3 0x14280 nfsidl nfsio 10832 513603 0 0 3 0x14280 nfsidl nfsio 52653 483925 0 0 3 0x14280 nfsidl nfsio 39479 161204 0 0 3 0x14280 nfsidl nfsio 12860 100956 0 0 3 0x14280 nfsidl nfsio 39648 98968 0 0 3 0x14280 nfsidl nfsio 66859 430349 0 0 3 0x14280 nfsidl nfsio 39710 211516 0 0 3 0x14280 nfsidl nfsio 37098 343066 0 0 3 0x14280 nfsidl nfsio 49127 112923 0 0 3 0x14280 nfsidl nfsio 46160 240163 0 0 3 0x14280 nfsidl nfsio 36417 396738 0 0 3 0x14280 nfsidl nfsio 45897 178541 1 0 3 0x100083 ttyin getty 48709 95101 10478 0 2 0x2 syz-executor 92423 370185 10478 0 2 0x2 syz-executor 28873 246086 10478 0 7 0x3 syz-executor 64083 517541 0 0 3 0x14200 bored sosplice 57804 445747 10478 0 3 0x82 nanoslp syz-executor 40548 322317 10478 0 3 0x82 piperd syz-executor 10478 392185 96331 0 2 0x2 syz-executor 96331 439497 31246 0 3 0x10008a sigsusp ksh 31246 464799 51460 0 3 0x98 kqread sshd-session 51460 11241 5874 0 3 0x92 kqread sshd-session 5874 238973 1 0 3 0x88 kqread sshd 73533 223677 95692 74 3 0x1100092 bpf pflogd 95692 409238 1 0 3 0x80 sbwait pflogd 87763 96772 50175 73 3 0x1100090 kqread syslogd 50175 313533 1 0 3 0x100082 sbwait syslogd 64956 160983 1 0 3 0x100080 kqread resolvd 40346 417648 10741 77 3 0x100092 kqread dhcpleased 11879 128460 10741 77 3 0x100092 kqread dhcpleased 10741 262366 1 0 3 0x80 kqread dhcpleased 62111 522208 0 0 2 0x40014200 smr 15882 144591 0 0 2 0x14200 zerothread 50781 224474 0 0 3 0x14200 aiodoned aiodoned 88852 458156 0 0 3 0x14200 syncer update 76633 372668 0 0 3 0x14200 cleaner cleaner 93740 163405 0 0 3 0x14200 reaper reaper 96642 516403 0 0 3 0x14200 pgdaemon pagedaemon 74129 112828 0 0 3 0x14200 bored viomb 40464 490351 0 0 3 0x40014200 acpi0 acpi0 96758 133051 0 0 3 0x40014200 idle1 8109 497444 0 0 3 0x14200 bored softnet3 10125 327292 0 0 3 0x14200 bored softnet2 10312 430258 0 0 3 0x14200 bored softnet1 74077 291484 0 0 3 0x14200 bored softnet0 61032 81476 0 0 3 0x14200 bored systqmp 55100 425092 0 0 3 0x14200 bored systq 70060 475066 0 0 3 0x14200 tmoslp softclockmp 20182 394320 0 0 3 0x40014200 tmoslp softclock 90531 233367 0 0 3 0x40014200 idle0 1 41548 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32513 (syz-executor) thread 0xffff80002a44ca38 (57905) 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 (0xffff800001290670) #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 64559 (syz-executor) thread 0xffff80003c5b7708 (73150) exclusive rwlock sbufrcv r = 0 (0xffff80000142f698) #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 soreceive+0x28e sys/kern/uipc_socket.c:876 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10235 11045K 11717K 166960K 15846 0 pcb 18 18K 23K 166960K 1030 0 rtable 195 7K 8K 166960K 1065 0 pf 40 18K 26K 166960K 294 0 ifaddr 38 7K 8K 166960K 154 0 ifgroup 59 2K 2K 166960K 221 0 sysctl 4 1K 3K 166960K 15 0 counters 66 36K 37K 166960K 168 0 ioctlops 0 0K 4K 166960K 2019 0 iov 1 4K 22K 166960K 225 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1534 96K 97K 166960K 4756 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 28K 36K 166960K 65 0 VM map 2 1K 1K 166960K 2 0 sem 14 32K 32K 166960K 188 0 dirhash 12 2K 3K 166960K 105 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 3716 0 sigio 0 0K 0K 166960K 238 0 proc 72 91K 164K 166960K 1173 0 subproc 72 4K 4K 166960K 153 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 650 0 in_multi 78 6K 7K 166960K 374 0 ether_multi 1 0K 0K 166960K 19 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 1583 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 74K 92K 166960K 36226 0 UVM aobj 184 10K 12K 166960K 196 0 pinsyscall 44 88K 102K 166960K 5160 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 223 0 NDP 13 0K 2K 166960K 113 0 temp 82 6900K 6980K 166960K 206135 0 kqueue 16 24K 31K 166960K 639 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 120 402 0 399 4 1 3 3 0 8 2 rtentry 112 327 0 243 4 0 4 4 0 8 0 unpcb 144 2574 0 2552 18 12 6 6 0 8 5 syncache 336 28 0 28 10 9 1 1 0 8 1 tcpqe 32 3 0 3 3 2 1 1 0 8 1 tcpcb 808 1145 0 1137 28 21 7 7 0 8 6 arp 120 56 0 36 1 0 1 1 0 8 0 inpcb 376 4930 0 4910 68 60 8 15 0 8 5 nd6 136 72 0 53 1 0 1 1 0 8 0 pkpcb 40 81 0 81 6 5 1 1 0 8 1 kcovpl 48 17 0 9 1 0 1 1 0 8 0 ppxss 1168 29 0 29 7 6 1 1 0 8 1 pffrag 232 32 0 31 1 0 1 1 0 482 0 pffrnode 88 32 0 31 1 0 1 1 0 8 0 pffrent 40 109 0 108 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 4 0 3 4 3 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 6 0 3 4 3 1 1 0 8 0 pfstitem 24 201 0 114 1 0 1 1 0 8 0 pfstkey 128 205 0 118 3 0 3 3 0 8 0 pfstate 376 204 0 117 9 0 9 9 0 8 0 pfrule 1344 118 0 108 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1499 0 1066 38 10 28 31 0 8 0 art_table 32 1503 0 1066 4 0 4 4 0 8 0 art_node 16 313 0 237 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 16 1 0 1 1 0 8 0 semapl 112 181 0 169 1 0 1 1 0 8 0 shmpl 112 193 0 12 6 0 6 6 0 8 0 dirhash 1024 80 0 63 3 0 3 3 0 8 0 dino2pl 256 8183 0 6666 96 0 96 96 0 8 0 ffsino 280 8183 0 6666 109 0 109 109 0 8 0 nchpl 144 13499 0 12875 64 39 25 64 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 50332 0 50331 5 4 1 2 0 8 0 percpumem 16 98 0 51 1 0 1 1 0 8 0 kstatmem 264 128 0 102 3 0 3 3 0 8 1 scsiplug 72 14 0 14 9 8 1 1 0 8 1 scxspl 216 38447 0 38447 18 15 3 8 1 8 3 plimitpl 152 942 0 923 1 0 1 1 0 8 0 sigapl 424 4072 0 4001 12 3 9 9 0 8 0 futexpl 64 62277 0 62272 1 0 1 1 0 8 0 knotepl 120 865 0 0 24 0 24 24 0 8 0 kqueuepl 216 1239 0 1224 11 8 3 5 0 8 2 pipepl 328 746 0 718 17 9 8 8 0 8 5 fdescpl 504 4005 0 3973 5 0 5 5 0 8 0 filepl 152 29485 0 29245 48 28 20 20 0 8 7 lockfpl 104 1377 0 1375 2 0 2 2 0 8 1 lockfspl 48 529 0 527 1 0 1 1 0 8 0 sessionpl 144 58 0 48 1 0 1 1 0 8 0 pgrppl 48 257 0 239 1 0 1 1 0 8 0 ucredpl 104 5163 0 5146 1 0 1 1 0 8 0 zombiepl 144 4243 0 4242 2 1 1 1 0 8 0 processpl 1168 4072 0 4001 8 2 6 6 0 8 0 procpl 648 9723 0 9643 9 1 8 8 0 8 0 srpgc 96 27 0 27 6 5 1 1 0 8 1 sosppl 168 22 0 22 8 7 1 1 0 8 1 sockpl 688 8043 0 8000 82 69 13 19 0 8 8 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 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 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 51 0 0 6 0 6 6 0 8 0 mtagpl 96 27 0 0 1 0 1 1 0 8 0 mbufpl 256 1236 0 0 78 0 78 78 0 8 0 bufpl 280 10605 0 4439 441 0 441 441 0 8 0 anonpl 24 525503 0 507534 207 73 134 134 0 185 1 amapchunkpl 152 118969 0 118256 79 42 37 37 0 158 7 amappl16 200 12556 0 11804 101 48 53 53 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 183 0 170 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 4812 0 4780 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 39 0 38 1 0 1 1 0 8 0 amappl9 144 245 0 244 2 1 1 1 0 8 0 amappl8 136 49 0 46 1 0 1 1 0 8 0 amappl7 128 153 0 139 1 0 1 1 0 8 0 amappl6 120 302 0 296 1 0 1 1 0 8 0 amappl5 112 173 0 163 1 0 1 1 0 8 0 amappl4 104 463 0 442 1 0 1 1 0 8 0 amappl3 96 25021 0 24898 4 0 4 4 0 8 0 amappl2 88 1042 0 973 2 0 2 2 0 8 0 amappl1 80 25181 0 24527 19 3 16 16 0 8 0 amappl 88 35377 0 35183 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 260 0 260 5 5 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 195 0 12 4 0 4 4 0 8 0 uaddrrnd 24 4005 0 3973 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4005 0 3973 1 0 1 1 0 8 0 vmmpekpl 168 32501 0 32432 4 0 4 4 0 8 0 vmmpepl 168 254592 0 251833 191 43 148 148 0 357 17 vmsppl 456 4004 0 3973 7 2 5 5 0 8 0 rwobjpl 64 71904 0 64012 135 3 132 132 0 8 1 pdppl 4096 8017 0 7946 135 62 73 85 0 8 2 pvpl 32 31035 0 0 250 0 250 250 0 265 0 pmappl 248 4004 0 3973 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 449 0 121 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(fffffd806f284520,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806f284508,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806f284508,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd8063490528,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8063490528,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c5ade58) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80003c5ade58) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012904b0,fffffd805cdafe00,ffff80002a44ca38) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012904b0,fffffd80680e0d00,fffffd805cdafe00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012904b0,fffffd805cdafe00,ffff80003c5ae0d8,0,0,0) at sosend+0x804 sendit(ffff80002a44ca38,5,ffff80003c5ae250,0,ffff80003c5ae310) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff80002a44ca38,ffff80003c5ae3c0,ffff80003c5ae310) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80003c5ae3c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5ae3c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4d846496c0, 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 ktrsyscall(ffff80002a4b22b0,b,20,ffff80002b978450) at ktrsyscall+0x2b3 sys/kern/kern_ktrace.c:183 syscall(ffff80002b978450) at syscall+0x2e6 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002b978450) at syscall+0x2e6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x767002be8da0, count: -7