login: witness: lock order reversal: 1st 0xffff800001253ba0 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd807b50f810 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(fffffd807b50f810,9,0) at witness_checkorder+0x1047 rw_enter(fffffd807b50f800,1) at rw_enter+0x122 rrw_enter(fffffd807b50f800,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd8076bb36f0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8076bb36f0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800037217558) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800037217558) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012539f8,fffffd806b062600,ffff8000ffff7bf8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012539f8,fffffd806c54b700,fffffd806b062600,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012539f8,fffffd806b062600,ffff8000372177e8,0,0,0) at sosend+0xa40 sendit(ffff8000ffff7bf8,3,ffff800037217960,0,ffff800037217a20) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000ffff7bf8,ffff800037217ad0,ffff800037217a20) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800037217ad0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037217ad0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe111b95e10, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000372171b0 rbx 0xfffffd80042c7350 rdx 0 rcx 0xffff8000ffff7bf8 rax 0xffffffff834f2ff0 cpu_info_full_primary+0x1ff0 r8 0xffff800037217090 r9 0x8080808080808080 r10 0x5dfedd262c6c89e2 r11 0x5bff53844f670f3a r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81ac00e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000372171a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=268961 pid=85609 tcnt=3 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=0xffff8000ffff6530,0xffffffff836345a0 process=0xffff8000371f5b30 user=0xffff800037212000, vmspace=0xfffffd806bfae028 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85609 165481 14155 0 7 0 syz-executor 85609 313272 14155 0 2 0x4000000 syz-executor *85609 268961 14155 0 7 0x4000000 syz-executor 82799 415124 77224 0 3 0x80 nanoslp syz-executor 82799 40388 77224 0 3 0x4000080 kqsel syz-executor 7070 240134 50891 0 3 0x80 nanoslp syz-executor 7070 234540 50891 0 3 0x4000080 ttyout syz-executor 7070 65781 50891 0 3 0x4000080 fsleep syz-executor 50891 378168 90213 0 3 0x82 nanoslp syz-executor 82825 114220 1 0 3 0x80 nanoslp init 53601 292657 90213 0 3 0x82 wait syz-executor 36457 495309 90213 0 3 0x82 nanoslp syz-executor 9604 348213 0 0 3 0x14280 nfsidl nfsio 3369 320358 0 0 3 0x14280 nfsidl nfsio 86543 165783 0 0 3 0x14280 nfsidl nfsio 98755 106061 0 0 3 0x14280 nfsidl nfsio 4097 213836 0 0 3 0x14280 nfsidl nfsio 77306 505085 0 0 3 0x14280 nfsidl nfsio 14731 56639 0 0 3 0x14280 nfsidl nfsio 58192 313212 0 0 3 0x14280 nfsidl nfsio 44968 427751 0 0 3 0x14280 nfsidl nfsio 78987 392329 0 0 3 0x14280 nfsidl nfsio 95357 501401 0 0 3 0x14280 nfsidl nfsio 85788 23474 0 0 3 0x14280 nfsidl nfsio 2449 132176 0 0 3 0x14280 nfsidl nfsio 60440 265649 0 0 3 0x14280 nfsidl nfsio 32750 239219 0 0 3 0x14280 nfsidl nfsio 93349 281941 0 0 3 0x14280 nfsidl nfsio 92054 378472 0 0 3 0x14280 nfsidl nfsio 72799 364232 0 0 3 0x14280 nfsidl nfsio 8886 505276 0 0 3 0x14280 nfsidl nfsio 39078 204268 0 0 3 0x14280 nfsidl nfsio 40316 376560 0 0 3 0x14200 bored sosplice 92754 122490 97178 0 3 0x100082 sbwait arp 97178 98686 1 0 3 0x10008a sigsusp sh 7862 375861 90213 0 3 0x82 nanoslp syz-executor 43941 38931 90213 0 3 0x82 nanoslp syz-executor 77224 461377 90213 0 3 0x82 nanoslp syz-executor 14155 36646 90213 0 3 0x82 nanoslp syz-executor 71073 184527 90213 0 3 0x2 biowait syz-executor 90213 178189 5676 0 3 0x82 kqread syz-executor 5676 12856 72084 0 3 0x10008a sigsusp ksh 72084 511702 18333 0 3 0x98 kqread sshd-session 18333 269524 78931 0 3 0x92 kqread sshd-session 78931 488330 1 0 3 0x88 kqread sshd 37728 322143 54367 74 3 0x1100092 bpf pflogd 54367 231189 1 0 3 0x80 sbwait pflogd 9995 165570 75595 73 3 0x1100090 kqread syslogd 75595 431939 1 0 3 0x100082 sbwait syslogd 38953 203799 1 0 3 0x100080 kqread resolvd 737 110434 61460 77 3 0x100092 kqread dhcpleased 81810 37269 61460 77 3 0x100092 kqread dhcpleased 61460 404356 1 0 3 0x80 kqread dhcpleased 77991 125081 0 0 3 0x14200 bored smr 47933 197650 0 0 3 0x14200 pgzero zerothread 69595 109085 0 0 3 0x14200 aiodoned aiodoned 4661 461441 0 0 3 0x14200 syncer update 54315 260013 0 0 3 0x14200 cleaner cleaner 90992 519110 0 0 3 0x14200 reaper reaper 4319 440774 0 0 3 0x14200 pgdaemon pagedaemon 51858 75075 0 0 3 0x14200 bored viomb 94349 64858 0 0 3 0x40014200 acpi0 acpi0 53870 502963 0 0 3 0x40014200 idle1 73441 291778 0 0 3 0x14200 bored softnet3 60067 439546 0 0 3 0x14200 bored softnet2 69334 346869 0 0 3 0x14200 bored softnet1 84630 130869 0 0 3 0x14200 bored softnet0 19557 345791 0 0 3 0x14200 bored systqmp 2365 236721 0 0 3 0x14200 bored systq 62719 314700 0 0 3 0x14200 tmoslp softclockmp 90021 209100 0 0 3 0x40014200 tmoslp softclock 92495 255028 0 0 3 0x40014200 idle0 1 36639 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 85609 (syz-executor) thread 0xffff8000ffff7bf8 (268961) 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 (0xffff800001253ba0) #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 71073 (syz-executor) thread 0xffff8000ffffccb8 (184527) exclusive rrwlock inode r = 0 (0xfffffd807b50fb40) #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_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd520a8) #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11189K 12158K 166960K 13005 0 pcb 17 15K 16K 166960K 267 0 rtable 222 7K 7K 166960K 599 0 pf 36 18K 22K 166960K 153 0 ifaddr 42 7K 8K 166960K 80 0 ifgroup 55 2K 2K 166960K 120 0 sysctl 3 0K 2K 166960K 8 0 counters 64 36K 36K 166960K 104 0 ioctlops 0 0K 4K 166960K 1731 0 iov 0 0K 24K 166960K 66 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1474 93K 93K 166960K 2531 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 51 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 19 69K 93K 166960K 1334 0 sigio 0 0K 0K 166960K 88 0 proc 63 79K 127K 166960K 762 0 subproc 117 7K 7K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 231 0 in_multi 98 7K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 14 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 590 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 257 73K 78K 166960K 14175 0 UVM aobj 100 7K 7K 166960K 103 0 pinsyscall 44 88K 108K 166960K 2500 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 71 0 NDP 14 0K 1K 166960K 53 0 temp 73 6826K 6936K 166960K 51270 0 kqueue 13 20K 28K 166960K 207 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 120 129 0 125 1 0 1 1 0 8 0 rtentry 112 170 0 69 3 0 3 3 0 8 0 unpcb 144 854 0 834 6 5 1 4 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpcb 808 522 0 518 26 18 8 8 0 8 7 arp 120 33 0 15 1 0 1 1 0 8 0 inpcb 336 1562 0 1554 23 16 7 7 0 8 6 nd6 136 39 0 7 2 0 2 2 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 11 0 2 1 0 1 1 0 8 0 ppxss 1168 10 0 10 4 3 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 13 0 3 1 0 1 1 0 482 0 pffrnode 88 11 0 3 1 0 1 1 0 8 0 pffrent 40 25 0 15 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 1 0 0 1 0 1 1 0 8 0 pfstitem 24 103 0 37 1 0 1 1 0 8 0 pfstkey 128 104 0 38 3 0 3 3 0 8 0 pfstate 376 104 0 38 7 0 7 7 0 8 0 pfrule 1344 26 0 20 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 689 0 208 33 2 31 31 0 8 0 art_table 32 690 0 208 4 0 4 4 0 8 0 art_node 16 168 0 81 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 100 0 3 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3710 0 2204 95 0 95 95 0 8 0 ffsino 272 3710 0 2204 101 0 101 101 0 8 0 nchpl 144 5610 0 3918 64 0 64 64 0 8 0 uvmvnodes 80 4568 0 0 94 0 94 94 0 8 0 vnodes 216 4568 0 0 254 0 254 254 0 8 0 namei 1024 20225 0 20223 5 4 1 2 0 8 0 percpumem 16 66 0 20 1 0 1 1 0 8 0 kstatmem 264 64 0 40 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 17277 0 17276 15 13 2 8 1 8 1 plimitpl 152 348 0 331 1 0 1 1 0 8 0 sigapl 424 1657 0 1585 11 2 9 9 0 8 0 futexpl 64 18386 0 18385 1 0 1 1 0 8 0 knotepl 120 826 0 0 24 0 24 24 0 8 0 kqueuepl 216 296 0 283 1 0 1 1 0 8 0 pipepl 320 199 0 169 3 0 3 3 0 8 0 fdescpl 496 1615 0 1582 5 0 5 5 0 8 0 filepl 152 10701 0 10422 25 11 14 17 0 8 2 lockfpl 104 497 0 494 1 0 1 1 0 8 0 lockfspl 48 214 0 211 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 53 0 36 1 0 1 1 0 8 0 ucredpl 104 1937 0 1922 1 0 1 1 0 8 0 zombiepl 144 1784 0 1780 3 2 1 1 0 8 0 processpl 1160 1657 0 1585 6 0 6 6 0 8 0 procpl 648 3699 0 3622 9 1 8 8 0 8 0 srpgc 96 8 0 8 2 2 0 1 0 8 0 sosppl 168 7 0 7 3 3 0 1 0 8 0 sockpl 664 2574 0 2543 27 17 10 11 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 154 0 0 20 0 20 20 0 8 0 mcl2k 2048 42 0 0 4 0 4 4 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 394 0 0 24 0 24 24 0 8 0 bufpl 280 5619 0 102 395 0 395 395 0 8 0 anonpl 24 281710 0 276935 119 64 55 55 0 185 20 amapchunkpl 152 46200 0 45592 39 11 28 28 0 158 1 amappl16 200 7057 0 7026 59 48 11 18 0 8 8 amappl15 192 24 0 24 3 3 0 1 0 8 0 amappl14 184 137 0 125 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 2342 0 2308 4 2 2 3 0 8 0 amappl11 160 54 0 39 1 0 1 1 0 8 0 amappl10 152 12 0 12 2 2 0 1 0 8 0 amappl9 144 148 0 147 1 0 1 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 130 0 118 1 0 1 1 0 8 0 amappl6 120 195 0 192 1 0 1 1 0 8 0 amappl5 112 179 0 166 1 0 1 1 0 8 0 amappl4 104 332 0 313 1 0 1 1 0 8 0 amappl3 96 8554 0 8448 3 0 3 3 0 8 0 amappl2 88 1931 0 1845 3 0 3 3 0 8 0 amappl1 80 12126 0 11559 15 1 14 15 0 8 0 amappl 88 13685 0 13491 5 0 5 5 0 92 0 dma32768 32768 2 0 2 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 2 1 1 0 8 1 dma64 64 7 0 7 2 2 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 72 102 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1615 0 1582 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1615 0 1582 1 0 1 1 0 8 0 vmmpekpl 168 13946 0 13899 3 0 3 3 0 8 0 vmmpepl 168 106058 0 104125 127 29 98 99 0 357 10 vmsppl 448 1614 0 1582 6 2 4 5 0 8 0 rwobjpl 56 35772 0 30138 82 2 80 80 0 8 0 pdppl 4096 3237 0 3164 119 42 77 85 0 8 4 pvpl 32 15327 0 0 124 0 124 124 0 265 0 pmappl 248 1614 0 1582 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 474 0 92 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(fffffd807b50f810,9,0) at witness_checkorder+0x1047 rw_enter(fffffd807b50f800,1) at rw_enter+0x122 rrw_enter(fffffd807b50f800,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd8076bb36f0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8076bb36f0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800037217558) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800037217558) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012539f8,fffffd806b062600,ffff8000ffff7bf8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000012539f8,fffffd806c54b700,fffffd806b062600,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000012539f8,fffffd806b062600,ffff8000372177e8,0,0,0) at sosend+0xa40 sendit(ffff8000ffff7bf8,3,ffff800037217960,0,ffff800037217a20) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000ffff7bf8,ffff800037217ad0,ffff800037217a20) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff800037217ad0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037217ad0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe111b95e10, 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+0x190 __mp_lock_spin sys/kern/kern_lock.c:114 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x190 sys/kern/kern_lock.c:144 syscall(ffff800031f9ba70) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800031f9ba70) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x787da977a840, count: -6