dyj rPzicnj|,W沭xb`#ޔ(F}u6jKF~G/_ witness: lock order reversal: 1st 0xffff800000e48c40 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806f6fa708 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8292c146 -> 0xffffffff828d64a9 is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_enter+0xd1 #1 sblock+0x8a sys/kern/uipc_socket2.c:548 #2 soreceive+0x201 sys/kern/uipc_socket.c:876 #3 fifo_read+0xd2 sys/miscfs/fifofs/fifo_vnops.c:256 #4 VOP_READ+0xc3 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x10a #6 vndsetcred+0x86 sys/dev/vnd.c:684 #7 vndioctl+0xac1 sys/dev/vnd.c:485 #8 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x4a9 #11 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #11 syscall+0x8cf 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+0xd1 #1 sblock+0x8a sys/kern/uipc_socket2.c:548 #2 sosplice+0x2a7 sys/kern/uipc_socket.c:1385 #3 sys_setsockopt+0x1d7 sys/kern/uipc_syscalls.c:1231 #4 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #4 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806f6fa708,9,0) at witness_checkorder+0xc05 rw_enter(fffffd806f6fa6f8,1) at rw_enter+0xd1 rrw_enter(fffffd806f6fa6f8,1) at rrw_enter+0x91 sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805bb24450,2001) at VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 vn_lock(fffffd805bb24450,2001) at vn_lock+0x85 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002b0c52c8) at vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 namei(ffff80002b0c52c8) at namei+0x56a sys/kern/vfs_lookup.c:250 unp_connect(ffff800000e48a98,fffffd806eb37100,ffff800030b08040) at unp_connect+0x1ce sys/kern/uipc_usrreq.c:864 uipc_dgram_send(ffff800000e48a98,fffffd807f002200,fffffd806eb37100,0) at uipc_dgram_send+0xd7 sys/kern/uipc_usrreq.c:599 sosend(ffff800000e48a98,fffffd806eb37100,ffff80002b0c5558,0,0,0) at sosend+0x7aa sendit(ffff800030b08040,8,ffff80002b0c56d0,0,ffff80002b0c5790) at sendit+0x54c sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800030b08040,ffff80002b0c5840,ffff80002b0c5790) at sys_sendmsg+0x19b sys/kern/uipc_syscalls.c:604 syscall(ffff80002b0c5840) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002b0c5840) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48e4eb76850, count: -15 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80002b0c4f20 rbx 0xffffffff828e9404 pp_r600_decoded_lanes+0x2e88d rdx 0xffff800000dfedc0 rcx 0xffff800030b08040 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80002b0c4e00 r9 0x8080808080808080 r10 0x653dfb1a771c9c4b r11 0x3a9492d5de6c8358 r12 0xfffffd8003b24f20 r13 0xfffffd800333ddc0 r14 0x3 r15 0xffffffff rip 0xffffffff81cae62c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002b0c4f10 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) tid=362800 pid=83862 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800030b082d0,0xffff800030b08a90 process=0xffff80003353c918 user=0xffff80002b0c0000, vmspace=0xfffffd8069c32a68 estcpu=34, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53415 419717 54438 0 2 0x8000000 syz-executor.5 53415 220584 54438 0 3 0xc000080 fsleep syz-executor.5 22710 519798 39101 -1 2 0x8000010 syz-executor.4 22710 126316 39101 -1 3 0xc000090 netio syz-executor.4 83862 350067 13014 0 7 0x8000000 syz-executor.2 *83862 362800 13014 0 7 0xc000000 syz-executor.2 39740 223512 22046 0 3 0x8000082 nanoslp syz-executor.1 39101 254669 22046 0 3 0x8000082 nanoslp syz-executor.4 64330 147884 22046 0 3 0x8000082 wait syz-executor.0 2942 83400 0 0 3 0x14200 bored sosplice 15149 139424 0 0 3 0x14280 nfsidl nfsio 17432 335375 0 0 3 0x14280 nfsidl nfsio 75477 320361 0 0 3 0x14280 nfsidl nfsio 38515 520200 0 0 3 0x14280 nfsidl nfsio 47045 244718 0 0 3 0x14280 nfsidl nfsio 66101 376234 0 0 3 0x14280 nfsidl nfsio 93458 419415 0 0 3 0x14280 nfsidl nfsio 69533 494525 0 0 3 0x14280 nfsidl nfsio 44066 85077 0 0 3 0x14280 nfsidl nfsio 90606 51015 0 0 3 0x14280 nfsidl nfsio 38191 280742 0 0 3 0x14280 nfsidl nfsio 68086 235851 0 0 3 0x14280 nfsidl nfsio 39187 342464 0 0 3 0x14280 nfsidl nfsio 61823 194086 0 0 3 0x14280 nfsidl nfsio 1544 405112 0 0 3 0x14280 nfsidl nfsio 29987 508554 0 0 3 0x14280 nfsidl nfsio 4602 380573 0 0 3 0x14280 nfsidl nfsio 73625 473908 0 0 3 0x14280 nfsidl nfsio 31404 518670 0 0 3 0x14280 nfsidl nfsio 97034 316252 0 0 3 0x14280 nfsidl nfsio 22767 201156 0 0 3 0x14200 acct acct 13014 471899 22046 0 3 0x8000082 nanoslp syz-executor.2 27851 193775 22046 0 3 0x8000082 nanoslp syz-executor.3 34082 370659 22046 0 3 0x8000082 nanoslp syz-executor.6 54438 395737 22046 0 3 0x8000082 nanoslp syz-executor.5 99245 175992 22046 0 2 0x8000002 syz-executor.7 22046 265330 80651 0 3 0x1a000082 wait syz-fuzzer 22046 419013 80651 0 3 0x1e000082 nanoslp syz-fuzzer 22046 111943 80651 0 3 0x1e000082 wait syz-fuzzer 22046 230844 80651 0 3 0x1e000082 wait syz-fuzzer 22046 310973 80651 0 3 0x1e000082 wait syz-fuzzer 22046 229935 80651 0 3 0x1e000082 wait syz-fuzzer 22046 40541 80651 0 3 0x1e000082 thrsleep syz-fuzzer 22046 73710 80651 0 3 0x1e000082 thrsleep syz-fuzzer 22046 520452 80651 0 3 0x1e000082 thrsleep syz-fuzzer 22046 244020 80651 0 3 0x1e000082 wait syz-fuzzer 22046 177587 80651 0 3 0x1e000082 thrsleep syz-fuzzer 22046 141460 80651 0 3 0x1e000082 wait syz-fuzzer 22046 387877 80651 0 3 0x1e000082 wait syz-fuzzer 22046 295962 80651 0 3 0x1e000082 kqread syz-fuzzer 22046 176306 80651 0 3 0x1e000082 thrsleep syz-fuzzer 22046 3758 80651 0 3 0x1e000082 thrsleep syz-fuzzer 80651 23751 88514 0 3 0x810008a sigsusp ksh 88514 145626 7169 0 3 0x1800009a kqread sshd 7419 242390 1 0 3 0x18100083 ttyin getty 7169 390053 1 0 3 0x18000088 kqread sshd 55755 66534 91133 73 3 0x19100010 ffs_fsync syslogd 91133 246620 1 0 3 0x18100082 sbwait syslogd 73191 417616 1 0 3 0x18100080 kqread resolvd 60390 368826 42172 77 3 0x18100092 kqread dhcpleased 5272 15613 42172 77 3 0x18100092 kqread dhcpleased 42172 73381 1 0 3 0x18000080 kqread dhcpleased 8036 52249 0 0 3 0x14200 bored smr 64710 84682 0 0 2 0x14200 zerothread 89703 94974 0 0 3 0x14200 aiodoned aiodoned 48595 22999 0 0 3 0x14200 syncer update 75816 320833 0 0 3 0x14200 cleaner cleaner 62651 476044 0 0 3 0x14200 reaper reaper 12985 231299 0 0 3 0x14200 pgdaemon pagedaemon 17376 374357 0 0 3 0x14200 bored viomb 99320 56170 0 0 3 0x40014200 acpi0 acpi0 88224 299293 0 0 3 0x40014200 idle1 73300 470547 0 0 3 0x14200 bored softnet3 58519 52380 0 0 3 0x14200 bored softnet2 70832 167026 0 0 3 0x14200 bored softnet1 1933 68872 0 0 3 0x14200 bored softnet0 71701 519450 0 0 3 0x14200 bored systqmp 47946 431832 0 0 3 0x14200 bored systq 37487 51143 0 0 3 0x14200 tmoslp softclockmp 95567 453324 0 0 3 0x40014200 tmoslp softclock 27007 324701 0 0 3 0x40014200 idle0 1 269489 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 83862 (syz-executor.2) thread 0xffff800030b08040 (362800) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82dea520) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 unp_connect+0x1c6 sys/kern/uipc_usrreq.c:864 #2 uipc_dgram_send+0xd7 sys/kern/uipc_usrreq.c:599 #3 sosend+0x7aa #4 sendit+0x54c sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x19b sys/kern/uipc_syscalls.c:604 #6 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #6 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff800000e48c40) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 sblock+0x8a sys/kern/uipc_socket2.c:548 #3 sosend+0x259 sys/kern/uipc_socket.c:610 #4 sendit+0x54c sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x19b sys/kern/uipc_syscalls.c:604 #6 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #6 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 55755 (syslogd) thread 0xffff8000ffffcf70 (66534) exclusive rrwlock inode r = 0 (0xfffffd806e74b2c0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0xf1 sys/kern/vfs_syscalls.c:2931 #6 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #6 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 6480K 6942K 166960K 12268 0 pcb 17 12K 12K 166960K 110 0 rtable 205 8K 9K 166960K 545 0 pf 30 9K 10K 166960K 70 0 ifaddr 39 14K 15K 166960K 78 0 ifgroup 53 2K 2K 166960K 94 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 37K 166960K 92 0 ioctlops 0 0K 4K 166960K 1504 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1389 87K 88K 166960K 1886 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 53 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 85K 166960K 620 0 sigio 0 0K 0K 166960K 6 0 proc 58 79K 115K 166960K 629 0 subproc 104 6K 7K 166960K 156 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 81 0 in_multi 83 6K 7K 166960K 181 0 ether_multi 1 0K 0K 166960K 12 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 479 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 277 75K 94K 166960K 7696 0 UVM aobj 21 4K 4K 166960K 23 0 pinsyscall 35 70K 100K 166960K 1869 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 41 0 NDP 11 0K 1K 166960K 52 0 temp 62 6805K 6869K 166960K 19017 0 kqueue 12 18K 26K 166960K 105 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 83 0 80 1 0 1 1 0 8 0 rtentry 112 178 0 86 4 0 4 4 0 8 0 unpcb 144 480 0 463 2 1 1 2 0 8 0 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpqe 32 23 0 23 1 1 0 1 0 8 0 tcpcb 808 158 0 150 3 1 2 2 0 8 1 arp 120 28 0 14 1 0 1 1 0 8 0 inpcb 384 600 0 589 6 4 2 3 0 8 0 nd6 136 45 0 24 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 8 0 8 3 2 1 1 0 8 1 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 5 0 1 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 pfstitem 24 81 0 56 1 0 1 1 0 8 0 pfstkey 128 81 0 56 2 0 2 2 0 8 0 pfstate 376 81 0 56 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 714 0 300 33 3 30 30 0 8 3 art_table 32 715 0 300 4 0 4 4 0 8 0 art_node 16 175 0 91 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 5 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2417 0 895 96 0 96 96 0 8 0 ffsino 272 2417 0 895 102 0 102 102 0 8 0 nchpl 144 3416 0 1671 67 0 67 67 0 8 0 uvmvnodes 80 2895 0 0 60 0 60 60 0 8 0 vnodes 216 2895 0 0 161 0 161 161 0 8 0 namei 1024 11910 0 11909 3 2 1 2 0 8 0 percpumem 16 60 0 14 1 0 1 1 0 8 0 vmpool 696 1 0 1 1 0 1 1 0 8 1 kstatmem 264 50 0 28 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 19851 0 19850 11 9 2 8 1 8 1 plimitpl 152 135 0 119 1 0 1 1 0 8 0 sigapl 424 940 0 872 8 0 8 8 0 8 0 futexpl 64 9348 0 9347 1 0 1 1 0 8 0 knotepl 120 396 0 0 11 0 11 11 0 8 0 kqueuepl 216 205 0 196 1 0 1 1 0 8 0 pipepl 320 269 0 240 8 5 3 8 0 8 0 fdescpl 496 900 0 874 6 2 4 5 0 8 0 filepl 152 5493 0 5244 16 4 12 15 0 8 1 lockfpl 104 209 0 207 1 0 1 1 0 8 0 lockfspl 48 97 0 95 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 28 0 12 1 0 1 1 0 8 0 ucredpl 104 715 0 704 1 0 1 1 0 8 0 zombiepl 144 876 0 872 1 0 1 1 0 8 0 processpl 1144 940 0 872 6 0 6 6 0 8 0 procpl 656 1501 0 1415 9 0 9 9 0 8 0 srpgc 96 7 0 7 4 3 1 1 0 8 1 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 664 1169 0 1138 9 4 5 5 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 362 0 0 46 0 46 46 0 8 0 mtagpl 96 16 0 0 1 0 1 1 0 8 0 mbufpl 256 387 0 0 25 0 25 25 0 8 0 bufpl 280 7919 0 1663 447 0 447 447 0 8 0 anonpl 24 274094 0 268026 71 4 67 68 0 186 11 amapchunkpl 152 25939 0 25265 42 2 40 40 0 158 11 amappl16 200 6847 0 6720 21 9 12 20 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 167 0 156 2 1 1 2 0 8 0 amappl13 176 29 0 29 1 1 0 1 0 8 0 amappl12 168 1599 0 1571 2 0 2 2 0 8 0 amappl11 160 74 0 56 1 0 1 1 0 8 0 amappl10 152 57 0 55 1 0 1 1 0 8 0 amappl9 144 231 0 230 1 0 1 1 0 8 0 amappl8 136 140 0 105 2 0 2 2 0 8 0 amappl7 128 51 0 41 1 0 1 1 0 8 0 amappl6 120 368 0 354 2 1 1 2 0 8 0 amappl5 112 185 0 173 1 0 1 1 0 8 0 amappl4 104 550 0 515 2 1 1 2 0 8 0 amappl3 96 5194 0 5114 3 0 3 3 0 8 0 amappl2 88 1307 0 1238 5 3 2 5 0 8 0 amappl1 80 11352 0 10863 22 11 11 22 0 8 0 amappl 88 7091 0 6903 5 0 5 5 0 92 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 901 0 875 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 901 0 875 1 0 1 1 0 8 0 vmmpekpl 168 11235 0 11170 4 0 4 4 0 8 0 vmmpepl 168 76369 0 74565 115 27 88 115 0 357 1 vmsppl 440 900 0 875 4 0 4 4 0 8 0 rwobjpl 56 28925 0 24939 62 5 57 57 0 8 0 pdppl 4096 1809 0 1750 105 40 65 75 0 8 6 pvpl 32 49137 0 0 398 1 397 397 0 265 0 pmappl 248 900 0 875 4 2 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 430 0 52 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82c95ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82dea318) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dea318) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000359618e0,ffff800000069c00) at intr_handler+0xa4 sys/arch/amd64/amd64/intr.c:549 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff82dea318) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dea318) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800035961a40,ffff80000006bc00) at intr_handler+0xa4 sys/arch/amd64/amd64/intr.c:549 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7daab7a41d20, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806f6fa708,9,0) at witness_checkorder+0xc05 rw_enter(fffffd806f6fa6f8,1) at rw_enter+0xd1 rrw_enter(fffffd806f6fa6f8,1) at rrw_enter+0x91 sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805bb24450,2001) at VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 vn_lock(fffffd805bb24450,2001) at vn_lock+0x85 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002b0c52c8) at vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 namei(ffff80002b0c52c8) at namei+0x56a sys/kern/vfs_lookup.c:250 unp_connect(ffff800000e48a98,fffffd806eb37100,ffff800030b08040) at unp_connect+0x1ce sys/kern/uipc_usrreq.c:864 uipc_dgram_send(ffff800000e48a98,fffffd807f002200,fffffd806eb37100,0) at uipc_dgram_send+0xd7 sys/kern/uipc_usrreq.c:599 sosend(ffff800000e48a98,fffffd806eb37100,ffff80002b0c5558,0,0,0) at sosend+0x7aa sendit(ffff800030b08040,8,ffff80002b0c56d0,0,ffff80002b0c5790) at sendit+0x54c sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800030b08040,ffff80002b0c5840,ffff80002b0c5790) at sys_sendmsg+0x19b sys/kern/uipc_syscalls.c:604 syscall(ffff80002b0c5840) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002b0c5840) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48e4eb76850, count: -15