witness: lock order reversal: 1st 0xffff800010fe0740 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806b9f0770 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff83120c01 -> 0xffffffff830cf67f 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(fffffd806b9f0770,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806b9f0758,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806b9f0758,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f083548,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f083548,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80002ed63e48) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002ed63e48) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fe0580,fffffd806cb9de00,ffff80003c65f1f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fe0580,fffffd806b736700,fffffd806cb9de00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fe0580,fffffd806cb9de00,ffff80002ed640c8,0,0,0) at sosend+0x804 sendit(ffff80003c65f1f0,3,ffff80002ed64240,0,ffff80002ed64300) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff80003c65f1f0,ffff80002ed643b0,ffff80002ed64300) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80002ed643b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ed643b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4eb6c8f9240, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002ed63ac0 rbx 0xfffffd800433ee88 rdx 0 rcx 0xffff80003c65f1f0 rax 0xffffffff834ccff0 cpu_info_full_primary+0x1ff0 r8 0xffff80002ed639a0 r9 0x8080808080808080 r10 0xe269c7cb8fe4d27f r11 0x3fbdb65070547121 r12 0 r13 0xfffffd8003b56f00 r14 0x3 r15 0xffffffff rip 0xffffffff82a6fbd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002ed63ab0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=15116 pid=60869 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c65ece0,0xffffffff8360c558 process=0xffff80003c654ff0 user=0xffff80002ed5f000, vmspace=0xfffffd806bf8b018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60869 517326 83017 0 2 0 syz-executor 60869 514490 83017 0 3 0x4000080 fsleep syz-executor 60869 347892 83017 0 3 0x4000080 fsleep syz-executor *60869 15116 83017 0 7 0x4000000 syz-executor 58328 34293 92380 0 2 0 syz-executor 58328 202813 92380 0 3 0x4000080 fsleep syz-executor 58328 499245 92380 0 3 0x4000080 fsleep syz-executor 58328 487973 92380 0 3 0x4000080 fsleep syz-executor 12665 185250 43956 0 2 0 syz-executor 12665 373847 43956 0 3 0x4000080 fsleep syz-executor 96468 523094 75358 0 3 0x80 nanoslp syz-executor 96468 484562 75358 0 3 0x4000080 bell syz-executor 96468 514 75358 0 3 0x4000080 fsleep syz-executor 22628 488923 3614 0 7 0 syz-executor 22628 379427 3614 0 3 0x4000080 fsleep syz-executor 22628 111993 3614 0 3 0x4000080 fsleep syz-executor 22628 145734 3614 0 3 0x4000080 kqpoll syz-executor 66348 410238 0 0 3 0x14200 acct acct 76579 115467 92829 0 3 0x80 nanoslp syz-executor 76579 125075 92829 0 3 0x4000080 msgwait syz-executor 76579 455369 92829 0 3 0x4000080 fsleep syz-executor 89937 3893 0 0 3 0x14280 nfsidl nfsio 6607 479854 0 0 3 0x14280 nfsidl nfsio 12746 83554 0 0 3 0x14280 nfsidl nfsio 18443 227891 0 0 3 0x14280 nfsidl nfsio 6088 274089 0 0 3 0x14280 nfsidl nfsio 16776 457923 0 0 3 0x14280 nfsidl nfsio 75420 5004 0 0 3 0x14280 nfsidl nfsio 72581 241334 0 0 3 0x14280 nfsidl nfsio 39555 324409 0 0 3 0x14280 nfsidl nfsio 64948 354770 0 0 3 0x14280 nfsidl nfsio 79975 209414 0 0 3 0x14280 nfsidl nfsio 47475 161561 0 0 3 0x14280 nfsidl nfsio 24168 377441 0 0 3 0x14280 nfsidl nfsio 99682 268001 0 0 3 0x14280 nfsidl nfsio 34536 49565 0 0 3 0x14280 nfsidl nfsio 27942 209172 0 0 3 0x14280 nfsidl nfsio 3469 76800 0 0 3 0x14280 nfsidl nfsio 68662 77864 0 0 3 0x14280 nfsidl nfsio 83283 129978 0 0 3 0x14280 nfsidl nfsio 9947 122333 0 0 3 0x14280 nfsidl nfsio 29736 439672 0 0 3 0x14200 bored sosplice 75358 429654 85100 0 3 0x82 nanoslp syz-executor 92829 354719 85100 0 3 0x82 nanoslp syz-executor 43956 508008 85100 0 3 0x82 nanoslp syz-executor 89910 329226 85100 0 3 0x82 nanoslp syz-executor 92380 350541 85100 0 3 0x82 nanoslp syz-executor 22061 324828 85100 0 3 0x82 nanoslp syz-executor 83017 81865 85100 0 3 0x82 nanoslp syz-executor 3614 243223 85100 0 3 0x82 nanoslp syz-executor 85100 154608 61511 0 3 0x82 kqread syz-executor 61511 163104 39580 0 3 0x10008a sigsusp ksh 39580 275075 26364 0 3 0x98 kqread sshd-session 26364 163353 82094 0 3 0x92 kqread sshd-session 80013 235931 1 0 3 0x100083 ttyin getty 82094 192625 1 0 3 0x88 kqread sshd 1143 191343 75684 74 3 0x1100092 bpf pflogd 75684 250650 1 0 3 0x80 sbwait pflogd 84915 428709 50419 73 3 0x1100090 kqread syslogd 50419 503295 1 0 3 0x100082 sbwait syslogd 35382 242310 1 0 3 0x100080 kqread resolvd 5475 173076 23768 77 3 0x100092 kqread dhcpleased 8478 342859 23768 77 3 0x100092 kqread dhcpleased 23768 209719 1 0 3 0x80 kqread dhcpleased 28392 109129 0 0 3 0x14200 bored smr 54702 386343 0 0 2 0x14200 zerothread 42118 211106 0 0 3 0x14200 aiodoned aiodoned 23994 171464 0 0 3 0x14200 syncer update 94455 39194 0 0 3 0x14200 cleaner cleaner 32799 80364 0 0 3 0x14200 reaper reaper 44878 510676 0 0 3 0x14200 pgdaemon pagedaemon 76989 518802 0 0 3 0x14200 bored viomb 7496 278 0 0 3 0x40014200 acpi0 acpi0 41352 90398 0 0 3 0x40014200 idle1 73859 220980 0 0 3 0x14200 bored softnet3 83380 469298 0 0 3 0x14200 bored softnet2 13443 321246 0 0 3 0x14200 bored softnet1 60863 434753 0 0 3 0x14200 bored softnet0 91812 370398 0 0 3 0x14200 bored systqmp 56733 204090 0 0 3 0x14200 bored systq 33919 253050 0 0 3 0x14200 tmoslp softclockmp 99886 466092 0 0 3 0x40014200 tmoslp softclock 27866 430836 0 0 3 0x40014200 idle0 1 25308 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 60869 (syz-executor) thread 0xffff80003c65f1f0 (15116) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8360db10) #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 (0xffff800010fe0740) #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 22628 (syz-executor) thread 0xffff80003c5b67c8 (488923) exclusive rwlock uobjlk r = 0 (0xfffffd806cfd9f60) #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 uvm_fault+0x1e9 sys/uvm/uvm_fault.c:690 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bf8b4a8) #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_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1864 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:732 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 11111K 11927K 166960K 11694 0 pcb 17 12K 12K 166960K 54 0 rtable 209 7K 8K 166960K 372 0 pf 38 18K 21K 166960K 63 0 ifaddr 42 6K 7K 166960K 51 0 ifgroup 58 2K 2K 166960K 66 0 sysctl 4 1K 1K 166960K 4 0 counters 66 36K 36K 166960K 72 0 ioctlops 0 0K 4K 166960K 1501 0 iov 0 0K 12K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1463 92K 92K 166960K 1644 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 343 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 140K 166960K 550 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 19 0 in_multi 87 6K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 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 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 376 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 251 73K 76K 166960K 4663 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 43 86K 104K 166960K 1421 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 13 0K 2K 166960K 32 0 temp 42 6891K 6968K 166960K 5351 0 kqueue 13 20K 24K 166960K 53 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 120 120 0 117 2 0 2 2 0 8 1 rtentry 112 112 0 16 4 0 4 4 0 8 0 unpcb 144 217 0 195 5 1 4 4 0 8 3 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 58 0 54 1 0 1 1 0 8 0 arp 120 18 0 4 1 0 1 1 0 8 0 inpcb 376 237 0 227 2 0 2 2 0 8 0 nd6 136 24 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 3 0 2 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 29 0 0 1 0 1 1 0 8 0 pfstkey 128 29 0 0 1 0 1 1 0 8 0 pfstate 376 29 0 0 3 0 3 3 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 459 0 48 29 0 29 29 0 8 0 art_table 32 461 0 48 4 0 4 4 0 8 0 art_node 16 111 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 1936 0 430 95 0 95 95 0 8 0 ffsino 280 1936 0 430 109 1 108 109 0 8 0 nchpl 144 2402 0 707 63 0 63 63 0 8 0 uvmvnodes 80 2246 0 0 46 0 46 46 0 8 0 vnodes 216 2246 0 0 125 0 125 125 0 8 0 namei 1024 7548 0 7547 2 1 1 2 0 8 0 percpumem 16 50 0 3 1 0 1 1 0 8 0 kstatmem 264 32 0 6 2 0 2 2 0 8 0 scxspl 216 7274 0 7273 9 2 7 8 1 8 6 plimitpl 152 54 0 37 1 0 1 1 0 8 0 sigapl 424 663 0 591 9 0 9 9 0 8 0 futexpl 64 3373 0 3363 1 0 1 1 0 8 0 knotepl 120 299 0 0 10 0 10 10 0 8 0 kqueuepl 216 111 0 101 3 0 3 3 0 8 2 pipepl 328 184 0 157 8 0 8 8 0 8 5 fdescpl 504 623 0 591 5 0 5 5 0 8 0 filepl 152 2973 0 2746 14 0 14 14 0 8 2 lockfpl 104 62 0 60 1 0 1 1 0 8 0 lockfspl 48 29 0 27 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 286 0 273 1 0 1 1 0 8 0 zombiepl 144 593 0 591 1 0 1 1 0 8 0 processpl 1168 663 0 591 6 0 6 6 0 8 0 procpl 648 1011 0 925 8 0 8 8 0 8 0 srpgc 96 3 0 3 2 1 1 1 0 8 1 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 688 579 0 544 9 0 9 9 0 8 4 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 154 0 0 10 0 10 10 0 8 0 bufpl 280 2628 0 129 179 0 179 179 0 8 0 anonpl 24 116413 0 112896 49 2 47 47 0 185 9 amapchunkpl 152 14347 0 13769 23 0 23 23 0 158 0 amappl16 200 2342 0 2307 18 3 15 15 0 8 9 amappl15 192 11 0 11 2 2 0 1 0 8 0 amappl14 184 147 0 135 1 0 1 1 0 8 0 amappl13 176 35 0 34 1 0 1 1 0 8 0 amappl12 168 1264 0 1231 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 10 0 9 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 104 0 92 1 0 1 1 0 8 0 amappl6 120 174 0 171 1 0 1 1 0 8 0 amappl5 112 119 0 109 1 0 1 1 0 8 0 amappl4 104 304 0 285 1 0 1 1 0 8 0 amappl3 96 2623 0 2491 4 0 4 4 0 8 0 amappl2 88 629 0 567 2 0 2 2 0 8 0 amappl1 80 8310 0 7734 14 0 14 14 0 8 1 amappl 88 4280 0 4085 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 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 128 253 0 253 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 623 0 591 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 623 0 591 1 0 1 1 0 8 0 vmmpekpl 168 6880 0 6844 3 0 3 3 0 8 0 vmmpepl 168 43864 0 41914 95 0 95 95 0 357 5 vmsppl 456 622 0 591 5 1 4 5 0 8 0 rwobjpl 64 17149 0 13920 53 0 53 53 0 8 0 pdppl 4096 1253 0 1182 101 30 71 85 0 8 0 pvpl 32 14578 0 0 120 1 119 119 0 265 1 pmappl 248 622 0 591 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 281 0 35 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:437 witness_checkorder(fffffd806b9f0770,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806b9f0758,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806b9f0758,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f083548,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f083548,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80002ed63e48) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002ed63e48) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fe0580,fffffd806cb9de00,ffff80003c65f1f0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fe0580,fffffd806b736700,fffffd806cb9de00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fe0580,fffffd806cb9de00,ffff80002ed640c8,0,0,0) at sosend+0x804 sendit(ffff80003c65f1f0,3,ffff80002ed64240,0,ffff80002ed64300) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff80003c65f1f0,ffff80002ed643b0,ffff80002ed64300) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff80002ed643b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ed643b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4eb6c8f9240, 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(ffffffff8360d908) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8360d908) at __mp_lock+0x192 sys/kern/kern_lock.c:144 uvm_fault(fffffd806bf8b3a8,5c1e6b7a000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691 upageflttrap(ffff80003897cb20,5c1e6b7a000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003897cb20) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c3215ee69f0, count: -8