witness: lock order reversal: 1st 0xffff800001319818 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806bce2960 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(fffffd806bce2960,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806bce2948,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806bce2948,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806a8587e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806a8587e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff8000311606e8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000311606e8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001319658,fffffd8062054b00,ffff8000ffffa298) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001319658,fffffd806204bd00,fffffd8062054b00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001319658,fffffd8062054b00,ffff800031160968,0,0,0) at sosend+0x804 sendit(ffff8000ffffa298,3,ffff800031160ae0,0,ffff800031160ba0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffffa298,ffff800031160c50,ffff800031160ba0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff800031160c50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031160c50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x21b9c551d10, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff800031160360 rbx 0xfffffd800433e1c8 rdx 0xffff80000129f7c0 rcx 0xffff8000ffffa298 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff800031160240 r9 0x8080808080808080 r10 0x25414c63effbe8e1 r11 0xd6cafdee2920679 r12 0 r13 0xfffffd8003b56f00 r14 0x3 r15 0xffffffff rip 0xffffffff82a6fbd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800031160350 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=412413 pid=31028 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=0xffff80002a43c020,0xffff80002a43ccd8 process=0xffff80003c653910 user=0xffff80003115b000, vmspace=0xfffffd806bfb71e0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4896 374825 38898 0 7 0 syz-executor 15066 274250 55284 0 2 0 syz-executor 15066 157245 55284 0 2 0x4000080 syz-executor 18067 132371 61788 0 2 0 syz-executor 62832 122895 88287 0 2 0 syz-executor 62832 278009 88287 0 3 0x4000080 ttyout syz-executor 69352 136753 34623 0 2 0 syz-executor 31028 110313 79841 0 2 0 syz-executor *31028 412413 79841 0 7 0x4000000 syz-executor 59632 138064 36156 0 2 0x10 syz-executor 59632 264024 36156 0 3 0x4000090 fsleep syz-executor 30271 155237 1 0 3 0x100083 ttyin getty 61788 434841 57484 0 2 0x2 syz-executor 34938 404135 0 0 3 0x14200 acct acct 88408 456456 0 0 3 0x14280 nfsidl nfsio 51577 268863 0 0 3 0x14280 nfsidl nfsio 45133 494167 0 0 3 0x14280 nfsidl nfsio 74353 277581 0 0 3 0x14280 nfsidl nfsio 58572 321182 0 0 3 0x14280 nfsidl nfsio 71371 395680 0 0 3 0x14280 nfsidl nfsio 67704 283501 0 0 3 0x14280 nfsidl nfsio 80531 252677 0 0 3 0x14280 nfsidl nfsio 8914 496045 0 0 3 0x14280 nfsidl nfsio 20979 269582 0 0 3 0x14280 nfsidl nfsio 8692 456772 0 0 3 0x14280 nfsidl nfsio 42858 104566 0 0 3 0x14280 nfsidl nfsio 11201 64792 0 0 3 0x14280 nfsidl nfsio 92380 319618 0 0 3 0x14280 nfsidl nfsio 79189 92736 0 0 3 0x14280 nfsidl nfsio 63868 19573 0 0 3 0x14280 nfsidl nfsio 12592 303622 0 0 3 0x14280 nfsidl nfsio 5250 385386 0 0 3 0x14280 nfsidl nfsio 23125 501271 0 0 3 0x14280 nfsidl nfsio 16263 472461 0 0 3 0x14280 nfsidl nfsio 58965 206950 0 0 3 0x14200 bored sosplice 88287 127358 57484 0 3 0x82 nanoslp syz-executor 55284 116549 57484 0 3 0x82 nanoslp syz-executor 36156 459233 57484 0 3 0x82 nanoslp syz-executor 34623 454027 57484 0 2 0x2 syz-executor 79841 403179 57484 0 3 0x82 nanoslp syz-executor 74327 122626 57484 0 3 0x2 biowait syz-executor 38898 38755 57484 0 3 0x82 nanoslp syz-executor 57484 368691 88071 0 3 0x82 kqread syz-executor 88071 236339 93521 0 3 0x10008a sigsusp ksh 93521 301284 38302 0 3 0x98 kqread sshd-session 38302 448645 21672 0 3 0x92 kqread sshd-session 21672 318000 1 0 3 0x88 kqread sshd 50524 156941 98549 74 3 0x1100092 bpf pflogd 98549 493634 1 0 3 0x80 sbwait pflogd 62050 94182 33510 73 3 0x1100090 kqread syslogd 33510 161868 1 0 3 0x100082 sbwait syslogd 77318 52736 1 0 3 0x100080 kqread resolvd 24746 410821 17100 77 3 0x100092 kqread dhcpleased 45602 295455 17100 77 3 0x100092 kqread dhcpleased 17100 86915 1 0 3 0x80 kqread dhcpleased 68809 121077 0 0 3 0x14200 bored smr 12241 71559 0 0 2 0x14200 zerothread 94401 63513 0 0 3 0x14200 aiodoned aiodoned 16345 57554 0 0 3 0x14200 syncer update 37511 297094 0 0 3 0x14200 cleaner cleaner 37233 253399 0 0 3 0x14200 reaper reaper 70744 347094 0 0 3 0x14200 pgdaemon pagedaemon 62886 120969 0 0 3 0x14200 bored viomb 10481 380414 0 0 3 0x40014200 acpi0 acpi0 58537 225512 0 0 3 0x40014200 idle1 43726 266409 0 0 3 0x14200 bored softnet3 46444 480210 0 0 3 0x14200 bored softnet2 3732 484656 0 0 3 0x14200 bored softnet1 66387 269530 0 0 3 0x14200 bored softnet0 59097 372109 0 0 3 0x14200 bored systqmp 70789 10657 0 0 3 0x14200 bored systq 8915 357444 0 0 3 0x14200 tmoslp softclockmp 29024 309573 0 0 3 0x40014200 tmoslp softclock 52306 96209 0 0 3 0x40014200 idle0 1 57722 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 31028 (syz-executor) thread 0xffff8000ffffa298 (412413) 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 (0xffff800001319818) #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 74327 (syz-executor) thread 0xffff80002a438f48 (122626) exclusive rrwlock inode r = 0 (0xfffffd806bce2848) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f285408) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #12 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11124K 11577K 166960K 14526 0 pcb 17 16K 18K 166960K 529 0 rtable 197 7K 9K 166960K 574 0 pf 37 18K 25K 166960K 166 0 ifaddr 38 6K 7K 166960K 94 0 ifgroup 59 2K 2K 166960K 137 0 sysctl 3 1K 1K 166960K 3 0 counters 66 36K 36K 166960K 122 0 ioctlops 0 0K 4K 166960K 1698 0 iov 0 0K 28K 166960K 191 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1492 94K 94K 166960K 3354 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 35 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 145 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 2131 0 sigio 0 0K 0K 166960K 41 0 proc 72 91K 128K 166960K 784 0 subproc 72 4K 4K 166960K 84 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 244 0 in_multi 76 5K 7K 166960K 233 0 ether_multi 1 0K 0K 166960K 15 0 mrt 2 0K 0K 166960K 6 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 609 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 204 72K 87K 166960K 21755 0 UVM aobj 95 7K 7K 166960K 102 0 pinsyscall 42 84K 107K 166960K 3322 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 106 0 NDP 13 0K 2K 166960K 69 0 temp 80 6900K 7028K 166960K 76969 0 kqueue 13 20K 30K 166960K 337 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 120 290 0 287 5 4 1 3 0 8 0 rtentry 112 176 0 89 4 0 4 4 0 8 0 unpcb 144 1499 0 1477 13 9 4 5 0 8 2 syncache 336 18 0 18 4 3 1 1 0 8 1 tcpqe 32 9 0 9 4 3 1 1 0 8 1 tcpcb 808 932 0 919 19 11 8 8 0 8 5 arp 120 24 0 9 1 0 1 1 0 8 0 inpcb 376 2754 0 2734 36 23 13 19 0 8 9 nd6 136 42 0 23 1 0 1 1 0 8 0 pkpcb 40 4 0 4 3 3 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 21 0 21 5 4 1 1 0 8 1 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 13 0 7 1 0 1 1 0 482 0 pffrnode 88 13 0 7 1 0 1 1 0 8 0 pffrent 40 27 0 21 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 4 0 0 1 0 1 1 0 8 0 pfstitem 24 136 0 35 1 0 1 1 0 8 0 pfstkey 128 138 0 37 4 0 4 4 0 8 0 pfstate 376 138 0 37 11 0 11 11 0 8 0 pfrule 1344 32 0 24 2 0 2 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 834 0 446 31 6 25 31 0 8 0 art_table 32 838 0 446 4 0 4 4 0 8 0 art_node 16 171 0 91 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 139 0 129 1 0 1 1 0 8 0 shmpl 112 99 0 7 3 0 3 3 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 5284 0 3774 95 0 95 95 0 8 0 ffsino 280 5284 0 3774 109 0 109 109 0 8 0 nchpl 144 8379 0 6688 63 0 63 63 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 28290 0 28289 5 4 1 2 0 8 0 percpumem 16 75 0 28 1 0 1 1 0 8 0 kstatmem 264 82 0 56 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 5 4 1 1 0 8 1 scxspl 216 24317 0 24315 12 10 2 8 1 8 1 plimitpl 152 486 0 468 1 0 1 1 0 8 0 sigapl 424 2469 0 2398 9 0 9 9 0 8 0 futexpl 64 33771 0 33770 1 0 1 1 0 8 0 knotepl 120 557 0 0 17 0 17 17 0 8 0 kqueuepl 216 572 0 563 4 3 1 3 0 8 0 pipepl 328 362 0 335 6 3 3 6 0 8 0 fdescpl 504 2427 0 2396 5 0 5 5 0 8 0 filepl 152 16095 0 15866 31 15 16 16 0 8 4 lockfpl 104 1172 0 1170 5 4 1 3 0 8 0 lockfspl 48 463 0 461 1 0 1 1 0 8 0 sessionpl 144 40 0 31 1 0 1 1 0 8 0 pgrppl 48 78 0 61 1 0 1 1 0 8 0 ucredpl 104 2845 0 2831 1 0 1 1 0 8 0 zombiepl 144 2398 0 2398 1 0 1 1 0 8 1 processpl 1168 2469 0 2398 6 0 6 6 0 8 0 procpl 648 5842 0 5767 8 0 8 8 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 12 0 11 3 2 1 1 0 8 0 sockpl 688 4606 0 4563 36 22 14 19 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 57 0 0 6 1 5 6 0 8 0 mtagpl 96 256 0 0 7 0 7 7 0 8 0 mbufpl 256 4615 0 0 289 0 289 289 0 8 0 bufpl 280 7589 0 1423 441 0 441 441 0 8 0 anonpl 24 315560 0 309946 122 61 61 61 0 185 17 amapchunkpl 152 70263 0 69787 41 14 27 30 0 158 3 amappl16 200 6561 0 6455 61 42 19 19 0 8 8 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 145 0 133 1 0 1 1 0 8 0 amappl13 176 16 0 15 1 0 1 1 0 8 0 amappl12 168 3096 0 3068 4 2 2 3 0 8 0 amappl11 160 133 0 119 1 0 1 1 0 8 0 amappl10 152 7 0 7 3 2 1 1 0 8 1 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 129 0 117 1 0 1 1 0 8 0 amappl6 120 207 0 203 1 0 1 1 0 8 0 amappl5 112 132 0 122 1 0 1 1 0 8 0 amappl4 104 424 0 406 1 0 1 1 0 8 0 amappl3 96 14810 0 14714 4 0 4 4 0 8 0 amappl2 88 811 0 746 2 0 2 2 0 8 0 amappl1 80 17658 0 17095 16 2 14 16 0 8 0 amappl 88 21144 0 20995 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 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 2 1 1 0 8 1 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 72 101 0 7 2 0 2 2 0 8 0 uaddrrnd 24 2428 0 2397 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2428 0 2397 1 0 1 1 0 8 0 vmmpekpl 168 21881 0 21838 4 1 3 3 0 8 0 vmmpepl 168 155088 0 153192 123 24 99 107 0 357 6 vmsppl 456 2427 0 2397 6 1 5 5 0 8 0 rwobjpl 64 47297 0 40293 119 1 118 118 0 8 2 pdppl 4096 4863 0 4794 119 48 71 85 0 8 2 pvpl 32 17608 0 0 142 0 142 142 0 265 0 pmappl 248 2427 0 2397 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 614 0 81 16 0 16 16 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(fffffd806bce2960,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806bce2948,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806bce2948,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806a8587e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806a8587e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff8000311606e8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000311606e8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001319658,fffffd8062054b00,ffff8000ffffa298) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001319658,fffffd806204bd00,fffffd8062054b00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001319658,fffffd8062054b00,ffff800031160968,0,0,0) at sosend+0x804 sendit(ffff8000ffffa298,3,ffff800031160ae0,0,ffff800031160ba0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000ffffa298,ffff800031160c50,ffff800031160ba0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff800031160c50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031160c50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x21b9c551d10, 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+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8360d908) at __mp_lock+0x199 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: -4