witness: lock order reversal: 1st 0xffff8000014f6b80 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd8063cd1468 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff83404b47 -> 0xffffffff83373f99 is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 soreceive+0x27d sys/kern/uipc_socket.c:878 #3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xa1 sys/dev/vnd.c:685 #7 vndioctl+0xdfc sys/dev/vnd.c:486 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 sosplice+0x312 sys/kern/uipc_socket.c:1335 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1227 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #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:438 witness_checkorder(fffffd8063cd1468,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd8063cd1450,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd8063cd1450,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805d9788a0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805d9788a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c4375c0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c4375c0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014f6998,fffffd806d8c9f00,ffff80003b80bcb8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014f6998,fffffd8063a2f400,fffffd806d8c9f00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014f6998,fffffd806d8c9f00,ffff80003c437848,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003b80bcb8,8,ffff80003c4379c8,e,ffff80003c437a80) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003b80bcb8,ffff80003c437b30,ffff80003c437a80) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c437b30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c437b30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5b2bd76e80, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c437240 rbx 0 rdx 0xffff80000150e880 rcx 0xffff80003b80bcb8 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c437120 r9 0x8080808080808080 r10 0x8e16122d4b44c9c4 r11 0x1d167912c746af4c r12 0xfffffd8003f3b8c0 r13 0xfffffd8004723130 r14 0x3 r15 0xffffffff8341262b substchar+0x9d2b rip 0xffffffff8242b375 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c437230 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=46263 pid=10806 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=0xffff80003b80a560,0xffffffff838f53f0 process=0xffff80003c438028 user=0xffff80003c432000, vmspace=0xfffffd806cada208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10806 174793 83265 0 3 0x80 fsleep syz-executor *10806 46263 83265 0 7 0x4000000 syz-executor 10521 2632 52377 0 3 0x80 fsleep syz-executor 10521 507454 52377 0 3 0x4000080 pipewr syz-executor 63815 24462 98130 0 3 0x80 fsleep syz-executor 63815 399960 98130 0 3 0x4000080 ttyout syz-executor 82816 161971 60278 0 3 0x80 fsleep syz-executor 82816 122374 60278 0 3 0x4000080 fifor syz-executor 82816 512037 60278 0 3 0x4000080 fsleep syz-executor 25919 23973 84707 0 7 0 syz-executor 25919 314221 84707 0 3 0x4000080 fsleep syz-executor 25919 471903 84707 0 3 0x4000080 fsleep syz-executor 25919 90770 84707 0 3 0x4000080 fsleep syz-executor 25919 109912 84707 0 3 0x4000080 fsleep syz-executor 91602 10419 0 0 3 0x14280 nfsidl nfsio 87510 225759 0 0 3 0x14280 nfsidl nfsio 16844 367525 0 0 3 0x14280 nfsidl nfsio 98893 228020 0 0 3 0x14280 nfsidl nfsio 95643 103055 0 0 3 0x14280 nfsidl nfsio 83265 211263 56225 0 3 0x82 nanoslp syz-executor 9127 264023 0 0 3 0x14200 acct acct 65084 194635 1 0 3 0x100083 ttyopn getty 60278 502128 56225 0 3 0x82 nanoslp syz-executor 54232 330738 56225 0 3 0x82 wait syz-executor 42604 236300 56225 0 3 0x82 nanoslp syz-executor 98130 311731 56225 0 3 0x82 nanoslp syz-executor 52377 433544 56225 0 3 0x82 nanoslp syz-executor 84707 405037 56225 0 3 0x82 nanoslp syz-executor 7211 499142 56225 0 3 0x82 wait syz-executor 56225 261341 73851 0 3 0x82 kqread syz-executor 73851 316525 95493 0 3 0x10008a sigsusp ksh 95493 171457 79327 0 3 0x98 kqread sshd-session 79327 335262 42426 0 3 0x92 kqread sshd-session 42426 243117 1 0 3 0x88 kqread sshd 31422 398033 65757 74 3 0x1100092 bpf pflogd 65757 475812 1 0 3 0x80 sbwait pflogd 45741 522176 7696 73 3 0x1100090 kqread syslogd 7696 31647 1 0 3 0x100082 sbwait syslogd 73751 132646 1 0 3 0x100080 kqread resolvd 58502 342743 60615 77 3 0x100092 kqread dhcpleased 7453 17728 60615 77 3 0x100092 kqread dhcpleased 60615 54305 1 0 3 0x80 kqread dhcpleased 60058 250494 0 0 3 0x14200 bored smr 31399 286915 0 0 3 0x14200 pgzero zerothread 31267 119450 0 0 3 0x14200 aiodoned aiodoned 60754 165256 0 0 3 0x14200 syncer update 64526 307003 0 0 3 0x14200 cleaner cleaner 48688 426102 0 0 3 0x14200 reaper reaper 48909 309452 0 0 3 0x14200 pgdaemon pagedaemon 76476 68015 0 0 3 0x14200 bored viomb 88836 301378 0 0 3 0x40014200 acpi0 acpi0 20024 319417 0 0 3 0x40014200 idle1 55611 152466 0 0 3 0x14200 bored softnet1 58301 363860 0 0 3 0x14200 bored softnet0 41777 339980 0 0 3 0x14200 smrbar systqmp 7693 40580 0 0 3 0x14200 bored systq 38320 46171 0 0 3 0x14200 tmoslp softclockmp 92995 500293 0 0 3 0x40014200 tmoslp softclock 20443 397118 0 0 3 0x40014200 idle0 1 425556 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 10806 (syz-executor) thread 0xffff80003b80bcb8 (46263) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839cf8c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_connect+0x28c sys/kern/uipc_usrreq.c:872 #2 uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 #3 sosend+0x804 sys/kern/uipc_socket.c:-1 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000014f6b80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 sosend+0x2e9 sys/kern/uipc_socket.c:639 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 Process 25919 (syz-executor) thread 0xffff8000397fed20 (23973) exclusive rwlock uobjlk r = 0 (0xfffffd806cb52ec8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:655 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #4 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806f759a90) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 Process 41777 (systqmp) thread 0xffff8000ffffe7c8 (339980) shared rwlock systqmp r = 0 (0xffffffff83854488) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10252 11093K 11783K 166960K 13687 0 pcb 19 18K 29K 166960K 390 0 rtable 216 10K 10K 166960K 573 0 pf 39 18K 67485K 166960K 152 0 ifaddr 40 7K 7K 166960K 111 0 ifgroup 60 2K 2K 166960K 174 0 sysctl 4 1K 9K 166960K 17 0 counters 70 37K 38K 166960K 210 0 ioctlops 0 0K 8K 166960K 1782 0 iov 0 0K 16K 166960K 134 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1524 96K 96K 166960K 2806 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 81 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1289 0 sigio 1 0K 0K 166960K 127 0 proc 72 115K 164K 166960K 713 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 140 0 in_multi 79 5K 7K 166960K 163 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 564 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 270 163K 178K 166960K 13488 0 UVM aobj 35 12K 12K 166960K 40 0 pinsyscall 43 86K 106K 166960K 2519 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 88 0 NDP 13 0K 2K 166960K 76 0 temp 74 8674K 8740K 166960K 55137 0 kqueue 13 20K 30K 166960K 216 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 124 0 121 1 0 1 1 0 8 0 rtentry 176 172 0 85 6 0 6 6 0 8 0 unpcb 144 1100 0 1080 10 6 4 6 0 8 3 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 685 0 679 11 7 4 7 0 8 3 arp 136 26 0 8 1 0 1 1 0 8 0 inpcb 328 1967 0 1953 14 6 8 11 0 8 6 nd6 152 36 0 17 2 0 2 2 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 58 0 58 1 0 1 1 0 8 1 pppxif 1504 8 0 8 2 1 1 1 0 8 1 pfstscr 40 1 0 1 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 15 0 9 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 38 0 20 1 0 1 1 0 8 0 pfstkey 128 39 0 21 2 0 2 2 0 8 0 pfstate 448 39 0 21 5 0 5 5 0 8 0 pfrule 1344 29 0 23 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 739 0 390 32 9 23 31 0 8 1 art_table 40 740 0 390 5 0 5 5 0 8 0 art_node 32 168 0 89 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semapl 112 76 0 66 1 0 1 1 0 8 0 shmpl 112 30 0 3 1 0 1 1 0 8 0 dirhash 1024 36 0 19 3 0 3 3 0 8 0 dino2pl 256 3812 0 2293 96 0 96 96 0 8 0 ffsino 296 3812 0 2293 119 1 118 118 0 8 0 nchpl 144 5564 0 5004 64 32 32 64 0 8 8 rtmask 32 12 0 12 2 2 0 1 0 8 0 vnodes 216 4800 0 0 267 0 267 267 0 8 0 namei 1024 20239 0 20238 3 1 2 2 0 8 1 percpumem 16 120 0 70 1 0 1 1 0 8 0 vcpupl 3968 5 0 0 1 0 1 1 0 8 0 vmpool 840 7 0 2 1 0 1 1 0 8 0 kstatmem 264 112 0 82 4 1 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 29120 0 29120 11 10 1 8 1 8 1 plimitpl 152 444 0 423 1 0 1 1 0 8 0 sigapl 424 1592 0 1538 8 1 7 7 0 8 0 knotepl 120 538 0 0 17 0 17 17 0 8 0 kqueuepl 224 418 0 409 5 0 5 5 0 8 4 pipepl 344 326 0 298 9 6 3 9 0 8 0 fdescpl 528 1565 0 1533 3 0 3 3 0 8 0 filepl 160 11978 0 11743 20 7 13 18 0 8 0 lockfpl 104 732 0 729 3 2 1 2 0 8 0 lockfspl 48 263 0 260 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 1538 0 1524 1 0 1 1 0 8 0 zombiepl 144 1541 0 1538 1 0 1 1 0 8 0 processpl 1232 1592 0 1538 6 1 5 5 0 8 0 procpl 664 3512 0 3449 7 0 7 7 0 8 0 sosppl 176 8 0 8 3 2 1 1 0 8 1 sockpl 752 3390 0 3353 28 17 11 17 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 39 0 0 5 0 5 5 0 8 0 mtagpl 96 84 0 0 3 0 3 3 0 8 0 mbufpl 256 342 0 0 20 0 20 20 0 8 0 bufpl 280 11933 0 5796 439 0 439 439 0 8 0 anonpl 32 11013 0 0 89 0 89 89 0 246 0 amapchunkpl 152 46355 0 45641 46 11 35 35 0 158 5 amappl16 200 5337 0 5059 26 11 15 16 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 14 0 14 1 1 0 1 0 8 0 amappl13 176 468 0 467 1 0 1 1 0 8 0 amappl12 168 1969 0 1926 3 0 3 3 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 53 0 39 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 91 0 89 1 0 1 1 0 8 0 amappl6 120 327 0 312 1 0 1 1 0 8 0 amappl5 112 89 0 78 1 0 1 1 0 8 0 amappl4 104 477 0 446 1 0 1 1 0 8 0 amappl3 96 7897 0 7787 4 1 3 3 0 8 0 amappl2 88 1741 0 1661 2 0 2 2 0 8 0 amappl1 80 16126 0 15532 15 1 14 15 0 8 0 amappl 88 12462 0 12270 5 0 5 5 0 92 0 uvmvnodes 80 149 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 9 0 9 3 3 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 39 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1565 0 1533 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1565 0 1533 1 0 1 1 0 8 0 vmmpekpl 168 14895 0 14845 3 0 3 3 0 8 0 vmmpepl 168 107479 0 105217 110 7 103 103 0 357 0 vmsppl 488 1564 0 1533 6 1 5 5 0 8 0 rwobjpl 80 31333 0 29929 32 1 31 31 0 8 0 pdppl 4096 3152 0 3075 116 37 79 86 0 8 2 pvpl 32 18608 0 0 150 0 150 150 0 265 0 pmappl 256 1571 0 1535 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 323 0 60 8 0 8 8 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:438 witness_checkorder(fffffd8063cd1468,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd8063cd1450,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd8063cd1450,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805d9788a0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805d9788a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c4375c0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c4375c0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014f6998,fffffd806d8c9f00,ffff80003b80bcb8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014f6998,fffffd8063a2f400,fffffd806d8c9f00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014f6998,fffffd806d8c9f00,ffff80003c437848,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003b80bcb8,8,ffff80003c4379c8,e,ffff80003c437a80) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003b80bcb8,ffff80003c437b30,ffff80003c437a80) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c437b30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c437b30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5b2bd76e80, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 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(ffffffff839cf6b8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839cf6b8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806f759990,ff081272000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80002a34a500,ff081272000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a34a500) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7438ef9f8a40, count: -8